Patent ID: 11891466
Assignee: TRINSEO EUROPE GMBH
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 4:
5. An acrylic copolymer comprising, as polymerized monomers:
a) from 0.2 to 20 weight percent of monomer units comprising at least one of tert-butyl cyclohexyl methacrylate; 3,3,5-trimethylcyclohexyl(meth)acrylate; tetrahydrofurfuryl methacrylate or a mixture thereof;
b) from 80 to 99.8 weight percent (meth)acrylate monomer units;
wherein said acrylic copolymer has:
i) a Tg of from 116° C. to 145° C.;
ii) a weight average molecular weight (Mw) of at least 110,000; and
iii) a residual monomer level of less than 1.2 weight percent;, wherein a composition comprising the acrylic copolymer is optically clear and has less than 5% sagging at 1,000 hours in an 85° C./85% RH test.