Multi-coat polymer photonic crystal films
AssigneeColorado State University Research Foundation
InventorsRyan Michael Pearson, Matthew David Ryan, Garret Miyake
Life of this patent
Estimating the term…
Abstract
Polymer composite photonic crystal materials are disclosed as coatings with topcoats having high reflection (>30%) in a specific range of the electromagnetic spectrum, such as ultraviolet (<400 nm), visible (Vis, 400 nm-700 nm), or near-infrared radiation range (NIR, 700-2000 nm), and optionally a relatively low reflection (<20% reflection) in a second, different range of the electromagnetic spectrum. Surprisingly, it was found that through a multi-layer coating approach, the optical properties of polymer composite photonic crystal films can be selectively modified from a variety of different coating methods, including spray deposition.
Claims10
A multilayer coating comprising:
- a) a first layer of a photonic crystal film comprising an additive and brush block copolymer (BBCP) of Formula IA or Formula IB:
- wherein
- Rx is —(C2-C6)alkyl-OC(═O)G1 wherein G1 comprises polyacrylate, polymethacrylate or polylactic acid;
- or
- —(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;
- Ry is —(C2-C6)alkyl-OC(═O) G1 wherein G1 comprises polyacrylate, polymethacrylate or polylactic acid;
- or
- —(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;
- each G is each independently CH2 or C═O;
- each J1 is independently CH2, C═O, or O;
- each J2 is independently CH2, C═O, or O;
- each Q is independently alkyl, cycloalkyl, heterocycloalkyl, carbonyl, silyl, 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.
Dependencies are inferred from the claim text.