Nova Patents
CA2308448C

Polymeric compositions, and the preparation and use thereof

Abstract

A substantially non-gelled polymeric composition is disclosed and comprises the reaction product of an A polymer which is anaddition polymer having 3.5 or more reactive functional groups per polymer chain and a B polymer having about 2 to about 3 functionalgroups per polymer chain that are co-reactive with the reactive functional group of the A polymer. Also disclosed is a process for preparingsuch polymeric compositions, powder coatings and 100 % solids ink resins prepared with such polymeric compositions, and a method fordeglossing a powder coating using such polymeric compositions.

CA2308448C, drawing sheet 1
Sheet 1 of 7

Term

Term ended

Expired 12 November 2018, 7.9 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

50 claims: 10 independent, 40 dependent

  1. 1
    CA 02308448 2003-08-25 * 42 What is claimed is:1. A polymeric composition comprising the reaction product of an A polymer winch is an addition polymer having 3.5 or more reactive functional groups per polymer chain and a B polymer having about 2 to about 3 functional groups per polymer chain that are co-reactive with said reactive functional groups of the A polymer, wherein substantially, all of the co-reactive functional groups of the B polymer have been co-readed and a molar ratio of A polymer to B polymer is about 3:1 to about 2:1.7, said polymeric composition being essentially non-gelled.
  2. 2
    A polymeric composition according to daim 1, wherein the B polymer has about 2 functional groups per polymer chain and the molar ratio of A polymer to B polymer i$ about 2:1 to about 2:1.7.
  3. 3
    A polymeric composition according to daim 1, wherein the B polymer has about 3 functional groups per polymer chain and the molar ratio of A polymer to B polymer is about 3:1.
  4. 5
    A polymeric composition according to any one of daims 2 or 3, wherein said B polymer is a condensation polymer selected from the group consisting of polyamide, polyester, epoxy, polyurethane, polyorganosiloxane and poly(ether).
  5. 6
    A polymeric composition according to daim 5, wherein said co-reactive functional groups of said B polymer are hydroxyl, carboxyl, epoxy, oxazolinyl, ester, amino, isocyanato or mixtures thereof. CA 02308448 2003-08-25
  6. 11
    A process for preparing a polymeric composition, said process comprising the step of reacting au A polymer which is an addition polymer having 3.5 or more reactive functional groups per polymer chain with a B polymer having about 2 to about 3 functional groups per polymer chain that are co-reactive with the reactive functional groups of the A polymer al a temperature and for a time sufficient to form the substantially non-gelled B polymer have been co-reacted and a molar ratio of A polymer to B polymer is about 3:1 to about 2:1.7, said polymeric composition being substantially non-gelled. 12, A process according to claim 11, wherein the B polymer has about 2 functional groups per polymer chain and the molar ratio of A polymer to B polymer is about 2:1 to about 2:1.7
  7. 21
    22. A powder coating composition comprising:(i) a substantially non-gelled polymeric composition that is the reaction product of an A polymer which is an addition polymer having 3.5 or more reactive functional groups per polymer chain and a B polymer having about 2 to about 3 functional groups per polymer chain that are co-reactive with said reactive functional groups of the A polymer;(ii) optionally a cross-linking agent;(iii) optionally a colorant;and (iv) optionally an epoxy resin, wherein substantially ail of the corcactive functional groups of the B polymer have been co-reacted and a molar ratio of A polymer to B polymer is about 3:1 to about 2:1.7.
  8. 23
    24. A powder coating composition according to daim 22, wherein the B polymer has about 3 functional groups per polymer chain and the molar ratio of A polymer to B polymer is about 3:1.
  9. 31
    32. A100% solids resin ink composition comprising:(i) a substantially nongelled polymeric composition that is the reaction product of an A polymer which is an addition polymer having 3.5 or more reactive functional groups per polymer chain and a B polymer having about 2 to about 3 functional groups per polymer chain that are co-reactive with said reactive functional groups of the A polymer;and (ii) a colorant, wherein substantially all of the co-reactive functional groups of the B polymer have been co-reacted and a molar ratio of A polymer to B polymer is about 3:1 to about 2:1.7.
  10. 41
    42. A method of preparing a reduced gloss acrylic epoxy hybrid powder coating comprising the step of mixing (a) a polymeric composition comprising a substantially nongelled polymeric composition that is the reaction product of an A polymer which is an addition polymer having 3.5 or more reactive functional groups per polymer chain and a B CA 02308448 2003-08-25 - 48 polymer having about 2 to about 3 functional groups per polymer chain that are co-reactive with said reactive functional groups of the A polymer; (ii) an epoxy resin and 0ii) an acrylic resin, wherein substantially all of the co-reactive functional groups of the B polymer have been co-reacled and a molar ratio of A polymer to B polymer is about 3:1 to about 2:1.7.
Independent claims10