Structural colorants that do not exhibit iridescence

Patent metadata

Field	Value
Publication number	US-2017369730-A1
Application number	US-201715632421-A
Country	US
Kind code	A1
Filing date	Jun 26, 2017
Priority date	Jun 27, 2016
Publication date	Dec 28, 2017
Grant date	—

Abstract

According to some embodiments, a structural colorant is provided including a semi-continuous structure formed by multiple layers of a first polymer. In some embodiments, air gaps are interspersed between the layers of the first polymer. In some embodiments, a second polymer is interspersed between the layers of the first polymer. In some embodiments, the semi-continuous structure has a center and at least two planes of symmetry through its center.

First claim

I claim:

1 . A structural colorant comprising:
a semi-continuous structure formed by multiple layers of a first polymer and air gaps interspersed between the layers of the first polymer, the semi-continuous structure having a center and at least two planes of symmetry through the center.

2 . The structural colorant of claim 1 , wherein the semi-continuous structure includes a multi-layer inner cylinder and a plurality of multi-layer partial cylinders surrounding the inner cylinder.

3 . The structural colorant of claim 1 , wherein the partial cylinders are semi-cylinders.

4 . The structural colorant of claim 1 , wherein the first polymer is selected from the group consisting of: poly(pentabromobenzyl methacrylate), poly(pentabromophenyl methacrylate), poly(pentabromobenzyl acrylate), poly(p-xylylene), poly(2,6-dichlorostyrene), poly(2-chlorostyrene), and the like.

5 . The structural colorant of claim 1 , wherein the first polymer has a refractive index from about 1.5 to about 1.8.

6 . The structural colorant of claim 1 , wherein the structural colorant has a maximum diameter from about 1 micron to about 50 microns.

7 . The structural colorant of claim 1 , wherein each of the layers of the first polymer has a thickness from about 50 nm to about 500 nm, and wherein each of the air gaps has a thickness from about 50 nm to about 500 nm.

8 . A structural colorant comprising:
a semi-continuous structure formed by multiple layers of a first polymer and multiple layers of a second polymer interspersed between the layers of the first polymer, the semi-continuous structure having a center and at least two planes of symmetry through the center.

9 . The structural colorant of claim 8 , wherein the semi-continuous structure includes a multi-layer inner cylinder and a plurality of multi-layer partial cylinders surrounding the inner cylinder.

10 . The structural colorant of claim 8 , wherein the partial cylinders are semi-cylinders.

11 . The structural colorant of claim 8 , wherein the first polymer is selected from the group consisting of: poly(pentabromobenzyl methacrylate), poly(pentabromophenyl methacrylate), poly(pentabromobenzyl acrylate), poly(p-xylylene), poly(2,6-dichlorostyrene), poly(2-chlorostyrene), and the like

12 . The structural colorant of claim 8 , wherein the second polymer is selected from the group consisting of: poly(hexafluoropropylene oxide), poly(pentadecafluorooctyl acrylate), poly(tetrafluoro-3-(heptafluoropropoxy)propyl acrylate), poly(tetrafluoroethylene), poly(nonafluoropentyl acrylate), poly(2,2,3,3,4,4,4-heptafluorobutyl acrylate), and the like.

13 . The structural colorant of claim 8 , wherein the first polymer has a refractive index from about 1.5 to about 1.8, and wherein the second polymer has a refractive index from about 1.2 to about 1.45.

14 . The structural colorant of claim 13 , wherein a difference between the refractive index of the first polymer and the refractive index of the second polymer is from about 0.1 to about 0.6.

Assignees

• Sherwin Williams Co

Inventors

• Hsiung Bor-Kai

Classifications

• C09D127/18 Primary

  Homopolymers or copolymers of tetrafluoroethene · CPC title

• C09D125/18

  Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen · CPC title

• C09D7/61

  inorganic · CPC title

• C09D133/10 Primary

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• B32B27/08

  of synthetic resin · CPC title