High optical purity copolymer film
AssigneeArkema France
InventorsBrian Edgecombe, Florence Mehlmann, Ryan Dirkx, Manuel Garcia
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Abstract
The invention relates to a high optical purity toughened copolymer film or coating. The copolymer is a graft or block copolymer, preferably acrylic, preferably produced by a controlled radical polymerization having an extremely low degree of particulate contamination and excellent optical properties. The film or coating is preferably formed by solvent-casting on a temporary substrate or solvent-coating on a permanent substrate.
Claims19
A high optical purity toughened copolymer film or coating comprising a block or graft copolymer having hard and soft blocks, wherein said film or coating contains less than 0.5 visible defects per square foot.
A process for forming a toughened acrylic copolymer-based film or coating comprising the steps of:
- a) forming a block or graft copolymer by a controlled radical polymerization, having hard and soft blocks;
- b) forming a stable polymer/solvent admixture of said block or graft copolymer in a solvent;
- c) coating said polymer/solvent admixture onto a substrate;
- d) evaporating said solvent to form a film or coating.
Dependencies are inferred from the claim text.