Good feeling coating body

The present invention relates to a coated body having a pleasant feel such as a moist feeling and a silky feeling, and an elastic feeling.

As a method for enhancing the texture of vehicle interior materials, interior building materials, etc., for example, a method of flocking on the surface of a base material such as an interior material or attaching a backskin is known. However, these methods increase costs, man-hours, etc., and do not provide excellent tactile sensation and appearance.

Therefore, for example, the following method has been proposed in order to form a coated body having a pleasant feel. That is, a resin-based treatment agent containing microcapsules is gravure-printed on the surface of a sheet made of a thermoplastic resin, and this is heated to expand the microcapsules and soften the resin to form fine irregularities on the sheet surface. The method is known (see, for example, Patent Document 1). Further, the microcapsules are dispersed in the vinyl chloride resin paste, the paste is printed on the backing material by gravure printing or the like, and this is heated to gel the paste and at the same time the microcapsules are expanded to give a suede-like appearance. A method for obtaining a decorative sheet exhibiting the above is known (see, for example, Patent Document 2). Further, an undercoat paint containing microcapsules is applied onto the base material, the paint is cured, and then the topcoat paint is further applied, and then the microcapsules are expanded by heating to form a coating film having an uneven pattern. A method is known (see, for example, Patent Document 3). Acrylic-epoxy water-based emulsion paints and urethane water-based emulsion paints are preferable undercoat paints that can be easily cured at a temperature lower than the expansion temperature of the microcapsules and do not contain a solvent that may damage the outer shell of the microcapsules. , Acrylic-based ultraviolet curable paints are exemplified, and melamine-alkyd-based, acrylic-based and other enamel paints are mentioned as preferable topcoat paints in terms of appearance.

<patcit num="1"><text>Japanese Unexamined Patent Publication No. 2-76735</text></patcit><patcit num="2"><text>Japanese Unexamined Patent Publication No. 62-28481</text></patcit><patcit num="3"><text>Japanese Unexamined Patent Publication No. 2-303573</text></patcit>

<p> However, in the method disclosed in Japanese Patent Application Laid-Open No. 2-76735 (Patent Document 1), the expansion of the microcapsules and the softening of the thermoplastic resin as the base material are simultaneously promoted by heating, so that the expansion of the microcapsules causes the microcapsules to expand. The softened resin is attracted to form irregularities, and its appearance and feel become hard. Further, in the method disclosed in Japanese Patent Application Laid-Open No. 62-28481 (Patent Document 2), since the layer containing the expanded microcapsules is the surface layer of the sheet, the microcapsules fall off from the sheet surface during actual use. I have something to do. In addition, since the surface of the sheet is not slippery, a part of the microcapsules may be damaged when it is rubbed in contact with other articles. Further, since the paste containing the microcapsules is printed on the backing material, clogging is likely to occur in the printing machine, and unevenness may occur on the printed surface, and repairing the clogging requires a great deal of time and effort. Further, in the method disclosed in Japanese Patent Application Laid-Open No. 2-303573 (Patent Document 3), although damage and shedding of microcapsules can be suppressed by topcoat coating, the surface is not slippery, so that microcapsules are rubbed against other articles. The capsule may be damaged or fall off.</p><p> The present invention solves the problems of the conventionally known technique and stably and surely expresses a good feel such as a moist feeling and a silky feeling and a good elastic feeling on a base material of any kind and shape. The purpose is to provide a painted body.</p>

<p> In order to achieve the above object, the present invention is characterized in that an undercoat silicone gel elastic layer and an overcoat elastic layer are formed on a base material, and the average deviation of the surface average friction coefficient is 0.0025 to 0.0100. It is a painted body.</p><p> Further, the present invention is a tactile coating body in which an undercoat silicone gel elastic layer and an overcoat elastic layer are formed on a base material, and the average deviation of the surface average friction coefficient is 0.0025 to 0.0100. The tactile coating material is a topcoat polyurethane elastic layer formed by applying and reacting a two-component flexible polyurethane paint composition for topcoat containing an active hydrogen compound, an organic polyisocyanate, and a filler. Is.</p><p> Further, the present invention is a tactile coating body in which an undercoat silicone gel elastic layer and a topcoat elastic layer are formed on a base material, and the average deviation of the surface average friction coefficient is 0.0025 to 0.0100. The above-mentioned feel-sensitive coating material is a topcoat silicone elastic layer formed by applying and reacting a water-based soft silicone coating composition for topcoat containing a silicone emulsion and a filler.</p><p> Further, in the present invention, the undercoat silicone gel elastic layer is formed by applying and reacting a soft silicone coating composition for undercoat containing a vinyl group-containing organopolysiloxane and hydrogenpolysiloxane. It is each of the above-mentioned feel-sensitive coating bodies.</p>

<p> For the first time in the present invention, it has become possible to provide a coated body that stably and surely expresses a good touch feeling such as a moist feeling and a silky feeling and a good elastic feeling on a base material of any kind and shape. ..</p>

Hereinafter, the present invention will be described in detail. The undercoat silicone gel elastic layer in the tactile coating body of the present invention is formed by applying and reacting a soft silicone coating composition for undercoating containing a vinyl group-containing organopolysiloxane and hydrogenpolysiloxane on a substrate. Is preferable. In the present invention, the silicone gel means a cured silicone product having a degree of needle insertion in the range of 0 to 200, which is measured using a 1/4 scale cone by the method specified in ASTM D-1403.

The soft silicone paint composition for undercoating that forms a silicone gel is (A) R (CH).₃) SiO unit 90 ~ 97mol%, RSiO_1.5Unit 0.1-2.5 mol%, especially 0.3-1.0 mol%, CH₃R (CH₂= CH) Si_0.5Unit 0.1 ~ 4.0 mol%, R (CH₃)₂SiO_0.5Unit 1-10 mol% [where R is a methyl group, a phenyl group and CF₃CH₂CH₂-Selected from the groups represented by groups, and among the R groups, phenyl group and CF₃CH₂CH₂-The total number of groups is 0.5-10 mol% of the total R groups, especially 3-8 mol%. ] Vinyl group-containing organopolysiloxane, (B) Hydogen polysiloxane containing at least one hydrogen atom bonded to a silicon atom per molecule: (A) Vinyl group bonded to a silicon atom in a vinyl group-containing organopolysiloxane It is more preferable that the number of hydrogen atoms bonded to the silicon atom per atom is 0.5 to 1.5, and if necessary, a platinum-based catalyst is contained.

The most preferable example of this (A) vinyl group-containing organopolysiloxane is (CH).₃)₂(CH₂= CH) SiO_0.5Unit: 2.5 mol%, (C₆H₅) (CH₃) SiO unit: 5.0 mol%, (CH₃)₂SiO unit: 92.0 mol%, (CH₃) SiO_1.5Unit: A vinyl group-containing organopolysiloxane having a viscosity of about 1000 cP at 25 ° C, consisting of 0.5 mol%.

(A) Vinyl group-containing organopolysiloxanes include cyclic siloxanes such as hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane and RSiO._1.5Compound containing unit, CH₃R (CH₂= CH) SiOSiCH₃R (CH₂= CH), R (CH)₃)₂SiOSiR (CH₃)₂Can be produced by mixing potassium hydroxide, quaternary ammonium hydroxide, quaternary phosphonium hydroxide, or a silicate compound thereof as a catalyst and reacting at 100 to 200 ° C.

(B) Hydrogen polysiloxane is a cross-linking agent that reacts with (A) vinyl group-containing organopolysiloxane. As long as one molecule contains at least one hydrogen atom bonded to a silicon atom, preferably two or three hydrogen atoms, the molecular structure is not particularly limited, and any of linear, cyclic, and branched hydrogenpolys can be used. Siloxane can also be used. The groups other than hydrogen bonded to the silicon atom of this compound include alkyl groups such as methyl group, ethyl group, propyl group and butyl group, aryl groups such as phenyl group, trill group and naphthyl group, benzyl group and phenylethyl group. Aralkyl group, CF₃CH₂CH₂-Group, C₈F₁₇CH₂CH₂-Group, C₂H₅-(-OCH₂CH₂-)-Substituted or unsubstituted monovalent hydrocarbon groups having 1 to 10 carbon atoms such as groups, as well as methyl, phenyl and CF.₃CH₂CH₂A group selected from the groups represented by-is preferable. The content of these substituents is arbitrary as long as the number of hydrogen atoms bonded to the silicon atom satisfies the above conditions. Specific examples of the hydrogen polysiloxane include the following compounds.

<chemistry num="1"><img file="JP2005296697A_D0001.tif" /></chemistry>

The amount of (B) hydrogen polysiloxane is the number of hydrogen atoms bonded to silicon atoms in (B) hydrogen polysiloxane per vinyl group contained in (A) vinyl group-containing organopolysiloxane. The amount is preferably 0.5 to 1.5, and more preferably 0.8 to 1.2. If the number of hydrogen atoms is less than 0.5, the crosslink density of the resulting silicone gel will be too low. If the number of hydrogen atoms is more than 1.5, foaming may occur due to the dehydrogenation reaction with (A) vinyl group-containing organopolysiloxane.

(B) Hydrogen polysiloxane can be a terminal group with, for example, tetrahydrotetramethylcyclotetrasiloxane and / or octamethylcyclotetrasiloxane (CH).₃)₃SiO_1/2Unit or H (CH)₃)₂SiO_1/2Disiloxane containing units or (CH₃)₃SiO (Si (CH)₃)₂O)₃Si (CH₃)₃It can be obtained by equilibrating an organosiloxane oligomer such as sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid or the like at a temperature of about -10 to + 40 ° C. in the presence of a catalyst such as sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid or the like.

The platinum-based catalyst is a catalyst for accelerating the addition reaction (hydrosylation) between the (A) vinyl group-containing organopolysiloxane and (B) hydrogen polysiloxane, and any known catalyst is used. be able to. Examples thereof include platinum black, chloroplatinic acid, alcohol-modified products of chloroplatinic acid, and complexes of chloroplatinic acid with olefins, aldehydes, vinylsiloxanes, acetylene alcohols, and the like. Of these, a complex of chloroplatinic acid and vinylsiloxane is preferable.

The amount of the platinum-based catalyst to be blended may be appropriately increased or decreased according to the desired curing rate, but the amount of platinum is preferably 0.1 to 500 ppm, more preferably 1 to 200 ppm with respect to (A) vinyl group-containing organopolysiloxane. However, when it is necessary to increase the light transmittance of the obtained silicone gel, a small amount is preferable, and specifically, about 1 to 50 ppm is appropriate.

The curing rate adjusting agent and the storage stability adjusting agent can be further added to the soft silicone coating composition for undercoating, if necessary. Examples of these include vinyl group-containing organopolysiloxanes such as methylvinylcyclotetrasiloxane, triallyl isocyanurates, alkylmalates, acetylene alcohols and modifications thereof with silanes or siloxanes, hydroperoxides, tetramethylethylenediamines, benzos. Examples thereof include inhibitors selected from triazole and the like. The blending amount of these is preferably in the range of 0.01 to 100,000 ppm with respect to (A) vinyl group-containing organopolysiloxane.

As the topcoat elastic layer in the tactile coating body of the present invention, a polyurethane elastic layer and a silicone elastic layer are preferable, and a polyurethane elastic layer is more preferable.

The two-component flexible polyurethane coating composition for forming the topcoat polyurethane elastic layer preferably contains an active hydrogen compound, an organic polyisocyanate, and a filler. Examples of the active hydrogen compound include high molecular weight polyols, high molecular weight polyamines, low molecular weight polyols, low molecular weight polyamines, amino alcohols, and any mixture of two or more of these. Of these, the polymer polyol alone, a mixture of the polymer polyol and a low molecular weight polyol, a polyamine or an amino alcohol is preferable, and the polymer polyol is more preferable. Examples of the polymer polyol include polyester polyol, polyamide ester polyol, polycarbonate polyol, polyether polyol, polyether ester polyol, polyolefin polyol, acrylic polyol, and any mixture of two or more of these. preferred polyester polyols arbitrariness.

Polyester polyols are generally obtained by polycondensation of polyols with polybasic acids. Examples of this polyol include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, and diethylene glycol. , Dipropylene glycol, hexylene glycol, dimethylol heptane, polyethylene glycol, polypropylene glycol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, tricyclodecanediol, tricyclodecanedimethanol, hydride bisphenol A Diols such as diols such as trimethylolethane, trimethylolpropane, glycerin, triols such as tris-2-hydroxyethylisocyanurate, and tetraols such as pentaerythritol can be mentioned. Examples of the polybasic acid include aliphatic dicarboxylic acids such as succinic acid, adipic acid, sebacic acid, azelaic acid and dimer acid, aliphatic unsaturated dicarboxylic acids such as fumaric acid, maleic acid, itaconic acid and citraconic acid, and tetrahydro. Alicyclic dicarboxylic acids such as phthalic acid, hexahydrophthalic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, endomethylenetetrahydrophthalic acid, phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, Examples thereof include aromatic polyvalent carboxylic acids such as pyromellitic acid and tris-2-carboxyethyl isocyanurate. All of these can be used alone or in combination of two or more.

Examples of the low molecular weight polyol include diol, triol, tetraol and the like used in the synthesis of the polyester polyol. Examples of low-molecular-weight polyamines include ethylenediamine, hexamethylenediamine, isophoronediamine, 4,4'-diphenylmethanediamine, 4,4'-diaminodiphenylsulfone, methylylenediamine, and piperazine. Examples of the low molecular weight amino alcohol include monoalkanolamines such as monoethanolamine, monopropanolamine, diethanolamine and dipropanolamine, and dialkanolamines. All of these can be used alone or in combination of two or more.

Examples of the organic polyisocyanate include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, xylene-1,4-diisocyanate, xylene-1,3-diisocyanate, 4,4'-diphenylmethane diisocyanate, 2 , 4'-diphenylmethane diisocyanate, 4,4'-diphenyl ether diisocyanate, 2-nitrodiphenyl-4,4'-diisocyanate, 2,2'-diphenylpropane-4,4'-diisocyanate, 3,3'-dimethyldiphenylmethane- 4,4'-diisocyanate, 4,4'-diphenylpropane diisocyanate, m-phenylenediisocyanate, p-phenylenediisocyanate, naphthylene-1,4-diisocyanate, naphthylene-1,5-diisocyanate, 3,3'-dimethoxydiphenyl- Aromatic diisocyanates such as 4,4'-diisocyanate, aromatic polyisocyanates such as polyphenylene polymethylene polyisocyanate and crude tolylene diisocyanate, aliphatic diisocyanates such as tetramethylene diisocyanate, hexamethylene diisocyanate, decamethylene diisocyanate and lysine diisocyanate, isophorone Organic diisocyanates such as diisocyanates, hydrogenated tolylene diisocyanates, hydrogenated xylene diisocyanates, hydrogenated diphenylmethane diisocyanates, alicyclic diisocyanates such as tetramethylxylene diisocyanates, and biuret-modified, uretdione-modified, and carbodiimide-modified versions of the organic diisocyanates. Examples include isocyanurate modified products, uretonimine modified products, and mixed modified products thereof. Of these, an aliphatic diisocyanate is preferable because it has excellent weather resistance. These can be used alone or in admixture of two or more.

The blending ratio of the active hydrogen compound and the organic polyisocyanate is preferably in the range of isocyanate group / active hydrogen (group) = 0.8 to 1.2 / 1.0, and further 0.9 to 1.1 / 1.0 (molar ratio). In order to promote the reaction between the active hydrogen compound and the organic polyisocyanate, the two-component flexible polyurethane coating composition is reacted with a tin compound such as dibutyltin dilaurate or an amine compound such as triethylamine, if necessary. Can be used together as a catalyst. In addition, a solvent can be used in combination, and examples of such an organic solvent include acetone, methyl ethyl ketone, tetrahydrofuran, dimethylformamide, dioxane, dimethyl sulfoxide, and N-methyl-2-pyrrolidone.

The filler is used to give the coating layer an elastic feel such as a moist feeling and a silky feeling. As the filler, powder granules having an average particle size of 50 μm or less, more preferably 1 to 30 μm, and microcapsules having an average particle size of 1 to 1000 μm and further 5 to 500 μm are preferable. Examples of the powder granules include mica, kaolin, zeolite, graphite, diatomaceous earth, white clay, clay, talc, slate powder, silicic anhydride, quartz fine powder, aluminum powder, zinc powder, silica such as precipitated silica, and carbonic acid. Inorganic powder granules such as calcium, magnesium carbonate, alumina, calcium oxide, magnesium oxide, or those whose surface is treated with organic substances such as fatty acids, wood flour, walnut flour, rice husk flour, pulp flour, cotton chips, acrylic Examples thereof include organic powder granules such as resin, polyurethane resin, polyethylene resin, cellulose, polyamide, silicone rubber, wool and collagen, and organic powder granules are particularly preferable. Materials for microcapsules include inorganic materials such as glass and silica, polyvinylidene chloride-acrylicnitrile copolymer, methylmethacrylate-acrylonitrile-methacrylonitrile copolymer, polyvinylidene chloride, polyvinylidene chloride, etc. Examples thereof include organic materials such as polyvinylidene nitrile and composite materials of inorganic and organic materials, but organic materials that easily obtain an elastic tactile sensation are preferable. These can be used alone or in combination of two or more.

The filler can be used by blending with both an active hydrogen compound and an organic polyisocyanate, or can be blended with either one.

In the two-component flexible polyurethane coating composition, the filler is 0.1 to 100 parts by mass and 1 to 50 parts by mass with respect to 100 parts by mass of the total amount (as solid content) of the active hydrogen compound and the organic polyisocyanate. Is preferable.

The water-based soft silicone coating composition for forming the topcoat silicone elastic layer preferably contains a silicone emulsion and the filler. This silicone emulsion is preferably composed of (a) an organopolysiloxane containing two or more alkenyl groups and (b) an organohydrogenpolysiloxane containing two or more Si-H bonds, and by removing water. It cures easily to form a uniform rubber film without foaming. This film has excellent strength and flexibility, and also has good adhesiveness to various substrates. The composition ratio of this silicone emulsion is as follows: (a) 100 parts by mass of an organopolysiloxane containing two or more alkenyl groups, and (b) an organohydrogenpolysiloxane containing two or more Si-H bonds. It is preferably 0.05 to 20 parts by mass.

(B) The organopolysiloxane containing two or more alkenyl groups is preferably an organopolysiloxane containing two or more alkenyl groups in one molecule represented by the following general formula.

<chemistry num="2"><img file="JP2005296697A_D0002.tif" /></chemistry>[In the formula, R is the same or different alkyl group having 1 to 20 carbon atoms or the aryl group having 6 to 20 carbon atoms, X is the same or different alkyl group having 1 to 20 carbon atoms, and the aryl group having 6 to 20 carbon atoms. Group, alkoxy group with 1 to 20 carbon atoms, hydroxyl group or alkenyl group with 1 to 20 carbon atoms, Y is X or (OSiX₂)_CThe same or heterogeneous group represented by X, a is a positive number from 0 to 1,000, preferably 0 to 100, b is a positive number from 100 to 10,000, preferably 1,000 to 5,000, and c is a positive number from 1 to 1,000. .. ]

Here, R is specifically a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a tetradecyl group, an octadecyl group, a phenyl group, a trill group, Examples thereof include a naphthyl group, but a methyl group is preferable. Specifically, in addition to the hydroxyl group, X is a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a tetradecyl group, an octadecyl group, a phenyl group, a trill group and a naphthyl group. , Methoxy group, ethoxy group, propoxy group, butoxy group, hexyloxy group, heptyloxy group, octyloxy group, decyloxy group, tetradecyloxy group, octadecyloxy group, vinyl group, allyl group and the like.

(B) The organopolysiloxane preferably contains at least two alkenyl groups in one molecule from the viewpoint of crosslinkability of (b) organohydrogenpolysiloxane with the Si-H bond, and the content thereof is 1. × 10^-6~1×10^-4The mol / g range is preferred. Examples of such an organopolysiloxane include those represented by the following general formulas.

<chemistry num="3"><img file="JP2005296697A_D0003.tif" /></chemistry>

<chemistry num="4"><img file="JP2005296697A_D0004.tif" /></chemistry>

Such organopolysiloxanes are, for example, cyclic siloxanes such as octamethylcyclotetrasiloxane and 2,4,6,8-tetramethyl-2 as vinyl raw materials in the presence of catalysts such as alkali metal hydroxides. , 4,6,8-Tetravinyl Cyclotetrasiloxane, 1,1,3,3-Tetramethyl-1,3-divinyldisiloxane, Hexavinyldisiloxane and other vinyl group-containing siloxane oligomers, trimethoxyvinylsilane, dimethoxymethyl Vinyl group-containing silanes such as vinylsilane, and other raw materials such as hexamethyldisiloxane, α, ω-dihydroxysiloxane oligomers, dimethoxydimethylsilane, diethoxydimethylsilane, trimethoxymethylsilane, triethoxymethylsilane, triethoxyphenylsilane, etc. It is obtained by subjecting a compound selected from the above to an equilibrium reaction.

Further, since (a) organopolysiloxane is used in the form of an emulsion, this may be made into an emulsion by a known emulsion polymerization method. Therefore, this is a cyclic siloxane, a vinyl group-containing siloxane oligomer or a vinyl group as a vinyl raw material in advance. After emulsifying and dispersing the contained silane, siloxane oligomer, alkoxysilane, etc. as other raw materials in water using an anionic surfactant or cationic surfactant, a catalyst such as an acid or an alkaline substance is added as necessary. It can be easily synthesized by carrying out a polymerization reaction.

(B) Organohydrogenpolysiloxane containing two Si-H bonds in the molecule is (a) a cross-linking agent for organopolysiloxane, which is preferably represented by the following general formula.

<chemistry num="5"><img file="JP2005296697A_D0005.tif" /></chemistry>[In the formula, R is the same as above, Q is R or a hydrogen atom, d is a positive number from 1 to 1,000, e is a positive number from 1 to 1,000, where at least one of Q is a hydrogen atom when e = 1. Is. ]

From the viewpoint of crosslinkability, this compound is preferably (a) containing at least 3 SiH bonds in one molecule when there are two alkenyl groups in the organosiloxane. Further, it is permissible to include a branching unit in this siloxane skeleton.

Specific examples of such an organohydrogenpolysiloxane include those represented by the following general formulas.

<chemistry num="6"><img file="JP2005296697A_D0006.tif" /></chemistry> Similar to (a) organopolysiloxane, these can also be synthesized by equilibration reaction or emulsion polymerization of Si-H bond-containing cyclic siloxane and hexamethyldisiloxane or 1,1,3,3-tetramethyldisiloxane. .. It can also be synthesized by a co-hydrolysis condensation reaction of methyldichlorosilane, trimethylchlorosilane, dimethylchlorosilane and the like.

(B) Organohydrogenpolysiloxane is also used in the form of an emulsion, but the blending amount is (a) 100 parts by mass of organopolysiloxane, and if it is less than 0.05 parts by mass, the crosslinkability becomes insufficient and silicone. As the strength of the rubber film decreases, the effect of improving adhesiveness and flame retardancy decreases, and if it exceeds 20 parts by mass, the film becomes too hard and the flexibility decreases. Depending on the molar ratio of (b) Si-H bond in organohydrogenpolysiloxane and (b) Si-Vi bond in organopolysiloxane, the compounding ratio of both (a) and (b) components is Si-H / It is preferable that Si-Vi = 0.01 to 1.0.

Further, an addition reaction catalyst can be used as necessary to carry out an addition reaction between (a) an organopolysiloxane containing an alkenyl group and (b) an organohydrogenpolysiloxane containing a SiH bond. Examples of this addition reaction catalyst include platinum compounds and rhodium compounds. Examples of the platinum compound include chloroplatinic acid, alcohol-modified chloroplatinic acid, and chloroplatinic acid-vinylsiloxane complex. Among these platinum compounds, a complex of vinylsiloxane and platinum compound, which is further modified with alcohol, is preferable, and in particular, platinum chloride acid or vinylsiloxane and platinum chloride acid described in Japanese Patent Publication No. 33-9969. Complexes are preferred. As the rhodium compound, RhCl (Ph) described in Japanese Patent Application Laid-Open No. 4-352793₃P)₃And so on. It is desirable that these catalysts be diluted with an organopolysiloxane containing an alkenyl group in advance and emulsified and dispersed in water using a surfactant to form an emulsion. If the amount of the addition reaction catalyst is less than 0.0001 parts by mass with respect to 100 parts by mass, there is no catalytic effect of the addition reaction, and if it exceeds 1 part by mass, there is no advantage and it is uneconomical. The amount is preferably 0.005 to 0.1 parts by mass, and more preferably 0.005 to 0.1 parts by mass.

In the silicone emulsion, the above-mentioned components (a) and (b) and an addition reaction catalyst are blended as necessary, and a surfactant is used to form these in the form of an emulsion. The surfactant is not particularly limited, but for example, anionic surfactants such as alkyl sulfates, alkylbenzene sulfonates and alkyl phosphates, polyoxyethylene alkyl ethers, polyoshikiethylene alkylphenyl ethers and polyoxyethylene fatty acids. Examples thereof include nonionic surfactants such as esters, cationic surfactants such as quaternary ammonium salts and alkylamine acetates, and amphoteric surfactants such as alkylbetaine and alkylimidazolin.

In the water-based soft silicone coating composition, the filler is preferably used in an amount of 0.1 to 100 parts by mass and further 0.5 to 30 parts by mass with respect to 100 parts by mass of the silicone emulsion (as a solid content). If necessary, the silicone emulsion further contains components to be added and blended with an addition reaction control agent, a water-based paint, or a fiber treatment agent, for example, a thickener, an inorganic powder, a penetrant, an antistatic agent, and a preservative. can do.

The undercoat or topcoat coating composition in the present invention further includes a coloring pigment, a dye, a dispersion stabilizer, a viscosity modifier, an ultraviolet absorber, an antioxidant, a light stabilizer, a fluorescent whitening agent, a leveling agent, and an antifoaming agent. , Curing catalyst, film-forming aid, organic solvent, texture agent and other additives can be blended and used.

The tactile coating body of the present invention is formed by forming an undercoat silicone gel elastic layer and a topcoat elastic layer on a base material, and the average deviation of the average friction coefficient of the surface thereof is 0.0025 to 0.0100. The elastic feeling of the undercoat silicone gel elastic layer can be expressed numerically by the hardness of the dry coating film (universal hardness value HUk) and the elastic deformation ratio. The elastic deformation ratio of the undercoat silicone gel elastic layer in the present invention is preferably 40% or more, and when the elastic deformation ratio is less than 40%, there is a tendency that only softness and no repulsive elasticity can be obtained. Coating film hardness is 0.5N / mm²Since the above results in a hard coating film without a feeling of elasticity, the coating film hardness of the undercoat silicone gel elastic layer in the present invention is 0.5 N / mm.²It is preferably less than. The moist and silky feel of the topcoat elastic layer is the average friction coefficient (μ) of the dry coating film and its fluctuation deviation (μ)._MD) And can be expressed numerically. The average deviation of the average friction coefficient of the good-feeling coated body in the present invention is 0.0025 to 0.0100, and if the average deviation of the average friction coefficient is less than 0.0025, the texture becomes smooth, and if it exceeds 0.0100, the texture becomes rough, which is not preferable. The good-feeling coated body in the present invention preferably has an average friction coefficient of 0.2 or less in order to obtain a moist feeling, and preferably has an average friction coefficient of more than 0.2 in order to obtain a smooth feeling.

The base material is not limited to any type and shape, but the undercoat silicone gel elastic layer of the tactile coating material of the present invention does not necessarily have to be formed by heat curing or thermal expansion. A synthetic resin base material that is sensitive to heating can also be suitably used as the base material in the present invention. Further, the surface of the base material may be smooth, or may be preliminarily textured or the like. Further, the base material may be a single layer or may be composed of a plurality of layers of two or more layers. When composed of two or more layers, each layer may be made of the same material or may be made of a different material. Further, each layer may be bonded by an adhesive.

The application of the soft silicone coating composition for undercoating or the two-component flexible polyurethane coating composition for topcoating or the water-based soft silicone coating composition to the base material is a doctor blade, reverse roll, gravure roll, spinner coat, extruder, spray coat, etc. It can be performed by a known method such as dip coating, flow coating, and wire coating. The coating amount is 1 to 300 g / m when converted to 100% by mass of solid content.², Especially 1 ~ 200g / m²Is preferable. After coating, the coating film is cured by leaving it at 100 ° C or lower, further 20 to 80 ° C, within 1 hour, and further for 5 to 30 minutes to preferably form an undercoat silicone gel elastic layer and a topcoat elastic layer. Can be done.

The undercoat silicone gel elastic layer of the tactile coating body of the present invention formed in this manner has a thickness of 100 to 5000 μm in a dry state, particularly 200 to 1000 μm, and the topcoat elastic layer has a thickness of 10 to 10 to a dry state. It is preferably 100 μm, particularly 20 to 50 μm. Further, in the tactile coating body of the present invention, the undercoat silicone gel elastic layer and the topcoat elastic layer may each consist of one layer, or may each consist of two or more layers.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not construed as being limited thereto. In the examples and comparative examples, "%" represents "mass%" excluding the elastic deformation ratio.

[Formation of undercoat silicone gel elastic layer and topcoat elastic layer]<u style="single">Example 1</u> Vinyl group-containing organopolysiloxane (manufactured by Shin-Etsu Chemical Co., Ltd., X32-2254-A, solid content 100%) 50 g and hydrogen polysiloxane (manufactured by Shin-Etsu Chemical Co., Ltd., X32-2254-B, solid content 100) %) 50 g was mixed with a high-speed stirrer to prepare a soft silicone coating composition for undercoating. Each of these coating compositions was applied onto an ABS resin substrate using an air spray with a wet film thickness of 300 μm, left at 80 ° C. for 30 minutes for reaction and drying to form an undercoat silicone gel elastic layer. Next, 100 g of polyester polyol (manufactured by Sumika Bayer Urethane Co., Ltd., desmophen 670BA, solid content 80%), 30 g of acrylic beads (manufactured by Sekisui Kasei Kogyo Co., Ltd., average particle size 8 μm) and 35 g of toluene were used in a high-speed stirrer. Hexamethylene polyisocyanate (manufactured by Asahi Kasei Chemicals Co., Ltd., Duranate E-402-90T, solid content 90%) was added to the mixture and mixed with a high-speed stirrer. The composition was prepared. This coating composition was applied onto the undercoat silicone gel elastic layer using an air spray so that the dry film thickness was about 50 μm, left at room temperature of 80 ° C for 30 minutes, reacted, dried, and the overcoat polyurethane elastic layer was dried. Was formed. The following tactile test 1 and tactile test 2 were performed on the obtained dry coating film. The results are shown in Table 1.

<u style="single">Comparative example 1</u> In Example 1, when the topcoat elastic layer was formed, the topcoat polyurethane elastic layer was formed in the same manner except that acrylic beads were not used in the topcoat flexible polyurethane coating composition, and a dry coating film was formed. The following tactile test 1 and tactile test 2 were performed on the obtained dry coating film. The results are shown in Table 1.

<u style="single">Example 2</u> Vinyl group-containing organopolysiloxane (manufactured by Shin-Etsu Chemical Co., Ltd., X32-2254-A, solid content 100%) 50 g and hydrogen polysiloxane (manufactured by Shin-Etsu Chemical Co., Ltd., X32-2254-B, solid content 100) %) 50 g was mixed with a high-speed stirrer to prepare a soft silicone coating composition for undercoating. Each of these soft silicone paint compositions for undercoating is applied onto an ABS resin substrate using an air spray with a wet film thickness of 300 μm, left at 80 ° C for 30 minutes for reaction and drying, and then the undercoat silicone gel elastic layer is formed. Was formed. Next, 75.5 g of silicone emulsion (manufactured by Shin-Etsu Chemical Co., Ltd., Shin-Etsu Silicone M Coat 56, solid content 53%), 2.0 g of talc-silica mixture, 1.0 g of carbon, 1.5 g of leveling agent / ultraviolet absorber mixture, and film formation. Auxiliary agent and 20.0 g of water were mixed with a high-speed stirrer to prepare a water-based soft silicone paint composition for topcoating. This coating composition was applied onto the undercoat silicone gel elastic layer using an air spray so that the dry film thickness was about 50 μm, left at room temperature of 80 ° C for 30 minutes, reacted, dried, and the topcoat silicone elastic layer was dried. Was formed. The following tactile test 1 and tactile test 2 were performed on the obtained dry coating film. The results are shown in Table 1.

<u style="single">Comparative example 2</u> In Example 2, when forming the topcoat elastic layer, the topcoat silicone elastic layer is formed in the same manner except that the talc / silica mixture, carbon, leveling agent, ultraviolet absorber mixture, film forming aid, and water are not used. , A dry coating film was formed. The following tactile test 1 and tactile test 2 were performed on the obtained dry coating film. The results are shown in Table 1.

[Tactile test 1] The elasticity of the obtained dry coating film was measured by measuring the coating film hardness (universal hardness value HUk) using an ultra-fine hardness tester (Fisher Scope H-100, manufactured by Fisher Instrument Co., Ltd.). The deformation ratio was determined, and the elastic tactile sensation was determined. Criteria for elastic tactile sensation; : Hardness HUk0.500N / mm²Elasticity with resilience of less than 40% and elastic deformation ratio of 40% or more. ×: Hardness HUk 0.500N / mm²A feeling of elasticity without resilience of more than or less than 40% of elastic deformation.

[Tactile test 2] The surface of the obtained dry coating film was measured using a friction tester (friction: fingerprint type sensor) (KES-SE, manufactured by Kato Tech Co., Ltd.), and the average friction coefficient and its average deviation were measured. Asked. In addition, the tactile sensation was determined by the touch of the surface of the dry coating film. Criteria for tactile sensation; : There is a silky or moist feeling, and the tactile sensation is good. ×: There is no silky or moist feeling, and the tactile sensation is poor.

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