Nova Patents
EP1940971B2

Multilayer effect pigment

Abstract

This record has no abstract on file.

Term

Term ended

Expired 10 February 2026, 0.6 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

8 claims: 8 independent, 0 dependent

  1. 1
    A multilayer effect pigment consisting of:a transparent substrate having a layer of titanium dioxide thereon;a layer of silicon dioxide on said titanium dioxide layer;and an outermost titanium dioxide layer placed on said silicon dioxide layer, wherein said inner titanium dioxide layer, said silicon dioxide layer, and the outermost titanium dioxide layer have optical thicknesses of 203 ± 12 nm, 117 ± 8 nm and 203 ± 12 nm respectively;or 203 ± 12 nm, 58 ± 8 nm and 227 ± 12 nm respectively;or 203 ± 12 nm, 114 ± 8 nm and 205 ± 12 nm respectively;or 203 ± 12 nm, 111 ± 8 nm and 208 ± 12 nm respectively;or 203 ± 12 nm, 108 ± 8 nm and 208 ± 12 nm respectively;or 203 ± 12 nm, 105 ± 8 nm and 210 ± 12 nm respectively;or 203 ± 12 nm, 102 ± 8 nm and 212 ± 12 nm respectively;or 203 ± 12 nm, 99 ± 8 nm and 212 ± 12 nm respectively;or 203 ± 12 nm, 96 ± 8 nm and 215 ± 12 nm respectively;said pigment being yellow, wherein the transparent substrate is a 1 micron thick natural or synthetic mica platelet substrate, 1 micron thick kaolin platelet substrate or 1 micron thick glass flake substrate.
  2. 2
    A multilayer effect pigment comprising:a transparent substrate having a layer of titanium dioxide thereon;a layer of silicon dioxide on said titanium dioxide layer;and an outermost titanium dioxide layer placed on said silicon dioxide layer wherein said inner titanium dioxide layer has an optical thickness of 243 +- 12 nm, said silicon dioxide layer has an optical thickness of 58 +- 8 nm, and said outermost titanium dioxide layer has an optical thickness of 243 +- 12 nm, said pigment being orange.
  3. 3
    A multilayer effect pigment consisting of:a transparent substrate having a layer of titanium dioxide thereon;a layer of silicon dioxide on said titanium dioxide layer;and an outermost titanium dioxide layer placed on said silicon dioxide layer wherein said inner titanium dioxide layer, said silicon dioxide layer, and said outermost titanium dioxide layer have optical thicknesses of 243 ± 12 nm, 58 ± 8 nm and 267 ± 12 nm respectively;or 243 ± 12 nm, 117 ± 8 nm and 248 ± 12 nm respectively;said pigment being red, wherein the transparent substrate is a 1 micron thick natural or synthetic mica platelet substrate, 1 micron thick kaolin platelet substrate or 1 micron thick glass flake substrate.
  4. 4
    A multilayer effect pigment consisting of:a transparent substrate having a layer of titanium dioxide thereon;a layer of silicon dioxide on said titanium dioxide layer;and an outermost titanium dioxide layer placed on said silicon dioxide layer wherein said inner titanium dioxide layer, said silicon dioxide layer, and the outermost titanium dioxide layer have optical thicknesses of 372 ± 12 nm, 58 ± 8 nm and 67 ± 12 nm respectively;or 143 ± 12 nm, 58 ± 8 nm and 45 ± 12 nm respectively;or 95 ± 12 nm, 58 ± 8 nm and 72 ± 12 nm respectively;or 107 ± 12 nm, 58 ± 8 nm and 64 ± 12 nm respectively;or 265 ± 12 nm, 117 ± 8 nm and 265 ± 12 nm respectively;said pigment being violet, wherein the transparent substrate is a 1 micron thick natural or synthetic mica platelet substrate, 1 micron thick kaolin platelet substrate or 1 micron thick glass flake substrate.
  5. 5
    A multilayer effect pigment consisting of:a transparent substrate having a layer of titanium dioxide thereon;a layer of silicon dioxide on said titanium dioxide layer;and an outermost titanium dioxide layer placed on said silicon dioxide layer wherein said inner titanium dioxide layer, said silicon dioxide layer, and the outermost titanium dioxide layer have optical thicknesses of 143 ± 12 nm, 58 ± 8 nm and 72 ± 12 nm respectively;or 119 ± 12 nm, 58 ± 8 nm and 86 ± 12 nm respectively;or 131 ± 12 nm, 58 ± 8 nm and 79 ± 12 nm respectively;said pigment being blue, wherein the transparent substrate is a 1 micron thick natural or synthetic mica platelet substrate, 1 micron thick kaolin platelet substrate or 1 micron thick glass flake substrate.
  6. 6
    A multilayer effect pigment comprising:a transparent substrate having a layer of titanium dioxide thereon, said layer having a optical thickness of 489 +- 12 nm;a layer of silicon dioxide on said titanium dioxide layer, said silicon dioxide layer having an optical thickness of 117 +- 8 nm;and an outermost titanium dioxide layer placed on said silicon dioxide layer and having an optical thickness of 489 +- 12 nm, said pigment being red.
  7. 7
    The multilayer effect pigment of any preceding claim, wherein said transparent substrate is glass flake.
  8. 8
    A cosmetic comprising liquid or powder and said multilayer effect pigment of any of claims 1 to 5.
Independent claims8