US 11,912,886 B2
Multi-coat polymer photonic crystal films
Ryan Michael Pearson, Berkeley, CA (US); Matthew David Ryan, Berkeley, CA (US); and Garret Miyake, Fort Collins, CO (US)
Assigned to Colorado State University Research Foundation, Fort Collins, CO (US)
Appl. No. 16/964,463
Filed by Colorado State University Research Foundation, Fort Collins, CO (US)
PCT Filed Jan. 30, 2020, PCT No. PCT/US2020/015928
§ 371(c)(1), (2) Date Jul. 23, 2020,
PCT Pub. No. WO2020/160299, PCT Pub. Date Aug. 6, 2020.
Claims priority of provisional application 62/799,945, filed on Feb. 1, 2019.
Prior Publication US 2021/0230444 A1, Jul. 29, 2021
Int. Cl. C09D 133/10 (2006.01); C09D 155/00 (2006.01); C09D 7/61 (2018.01); C09D 7/41 (2018.01); C09D 4/00 (2006.01); C09D 5/00 (2006.01); C09D 175/14 (2006.01); C09D 181/02 (2006.01); G02B 1/00 (2006.01); B29D 11/00 (2006.01); C08F 299/04 (2006.01); C09D 153/00 (2006.01)
CPC C09D 155/005 (2013.01) [B29D 11/00865 (2013.01); C08F 299/0485 (2013.01); C09D 4/00 (2013.01); C09D 5/002 (2013.01); C09D 7/41 (2018.01); C09D 7/61 (2018.01); C09D 133/10 (2013.01); C09D 153/00 (2013.01); C09D 175/14 (2013.01); C09D 181/02 (2013.01); G02B 1/005 (2013.01); Y10T 428/2848 (2015.01)] 19 Claims
 
1. A multilayer coating comprising:
a) a first layer of a photonic crystal film comprising a pigment and brush block copolymer (BBCP) of Formula IA or Formula IB:

OG Complex Work Unit Chemistry
wherein
Rx is —(C2-C6)alkyl-OC(═O)G1 wherein G1 comprises polyacrylate, polymethacrylate or polylactic acid;
Ry is —(C1-C8)alkyl-G2-G3 wherein G2 is —C(═O)O— or a nitrogen heterocycle and G3 comprises polystyrene, polyacrylate, polydimethylsiloxane, polyether, polymethacrylate, or polylactic acid;
R1 is unbranched alkyl;
R2 is branched alkyl;
J1 and G are each independently CH2 or C═O;
each J2 is independently CH2 or C═O;
each Q is independently alkyl, cycloalkyl, heterocycloalkyl, aryl, or heteroaryl;
a and b are each independently 0 to about 1000; and
x and y are each independently 1 to about 1000;
wherein blocks a, b, x and y are in any order, the ratio of x:a is 1:0 to about 1:3, and the ratio of y:b is 1:0 to about 1:3; and
b) a second layer comprising a topcoat wherein the topcoat is an optical adhesive or ultraviolet curable resin;
wherein the first layer and second layer form a multilayer film and the multilayer coating comprises one or more multilayer films.