Patent ID: 11859082
Assignee: ROHM AND HAAS ELECTRONIC MATERIALS LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 0:
1. A copolymer comprising:
first polymerized units of the formula (1):, wherein: R1 is H or a substituted or unsubstituted C1-C6 alkyl group; and R2 is a substituted or unsubstituted C3-C20 alkyl group that optionally includes one or more of —O—, —S—, —N—, —C(O)—, or —C(O)O—, —N—C(O)—, —C(O)—NR—; where R is H or a substituted or unsubstituted C1-C6 alkyl group; wherein R2 has a branched structure; and
second polymerized units of the formula (2):, wherein: R3 is a substituted or unsubstituted C1-C6 alkylene group that optionally includes one or more of —O—, —N—, —S—, —C(O)—, or —C(O)O—;
wherein the first polymerized units and the second polymerized units are chemically different, and the copolymer is free of fluorine; and wherein the first polymerized units of the formula (1) are present in the copolymer in an amount of greater than 60 mol %, based on the total number of moles in the copolymer.