Patent ID: 11897995
Assignee: BASF SE
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. The copolymer according to claim 1, wherein the at least one isocyanate (A) comprising at least one allophanate group and at least one active double bond is obtained by reacting at least one polyisocyanate (A1) with at least one compound of formula (A2),, wherein Z is selected from the group consisting of —O—, —NR5— and —S—;
R1 and R2 are independently of each other selected from the group consisting of H or CH3, linear or branched, substituted or unsubstituted C1-C30 alkyl, linear or branched, substituted or unsubstituted C2-C30 alkenyl, and substituted or unsubstituted phenyl;
G is selected from the group consisting of —(CH2)k—OH, —(CH2—CH2—O)mH, —(—CH(R3)—CH(R4)—O—)n—H, —CH2—CH(OH)—CH2—O—C(═O)—C(CH3)═CH2 and —CH2—CH(OH)—CH2—O—C(═O)—CH═CH2;
k, m and n are independently of each other an integer in the range of ≥1 to ≤20;
R3 and R4 are independently of each other selected from the group consisting of H, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl and tert-butyl; and
R5 is selected from the group consisting of H, linear or branched, substituted or unsubstituted C1s-C30 alkyl, linear or branched, substituted or unsubstituted C2-C30 alkenyl, and substituted or unsubstituted phenyl.