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US 12,312,429 B2Granted
Acid-functionalized copolymers of methyl methacrylate and acrylic resin compositions based thereon
AssigneeTrinseo Europe GmbH
InventorsJiaxin Jason Ge, Noah E. Macy, Florence Mehlmann, Estelle Meurice Pierrat
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Abstract
Acid-functionalized copolymers of methyl methacrylate having relatively high glass transition temperatures and molecular weights may be employed to manufacture articles having high light transmission values, low haze, high heat resistance, and high environmental stability, which are useful as optical protection films, zero-zero optical retardation films, and compensation films as well as lighting pipes and optical imaging lenses.
Claims14
An acrylic resin composition comprising:
- a copolymer of methyl methacrylate and methacrylic acid, the copolymer having a weight average molecular weight of at least 60,000 g/mole and a glass transition temperature of at least 115° C., wherein methyl methacrylate comprises from 70 to 99 weight % of the copolymer;
- a polymer of
- methyl methacrylate,
- methacrylic acid,
- ethyl acrylate or n-butyl acrylate, and
- styrene or α-methylstyrene;
- the polymer having a weight average molecular weight of at least 60,000 g/mole and a glass transition temperature of at least 115° C.;
- and
- an additional polymer of methyl methacrylate and one or more C1-C4 alkyl esters of acrylic acid, wherein the additional polymer has a weight average molecular weight of at least 130,000 g/mole.
6 more elements
Dependencies are inferred from the claim text.