Patent ID: 11964906
Assignee: COVESTRO (NETHERLANDS) B.V.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 18:
19. The composition according to claim 13, wherein the Norrish Type I photoinitiator comprises an acylgermanium compound possessing a structure in accordance with the following formula (I):, in which Ar1 is an aromatic group, either unsubstituted or further substituted in any position by one or more alkyl radicals, ethers, sulfides, silyl groups, halogens, carboxyl groups, vinyl groups, additional aromatic or heterocyclic groups, alkyl radicals, or aromatic or heterocyclic groups interrupted by one or more ether, sulfide, silyl, carboxyl, or vinyl groups, and in which R1, R2, and R3 independently may be an acyl, aryl, alkyl, or carbonyl group, either unsubstituted or further substituted one or more alkyl radicals, ethers, sulfides, silyl groups, halogens, carboxyl groups, vinyl groups, additional aromatic or heterocyclic groups, alkyl radicals, or aromatic or heterocyclic groups interrupted by one or more ether, sulfide, silyl, carboxyl, or vinyl groups;
further wherein one of the following conditions is satisfied:
(a) each of R1-R3 is an aryl-substituted or aromatic acyl group; or
(b) if exactly two of R1-R3 are an aryl-substituted or aromatic acyl group, the remaining substituted groups are a C1-C10 alkyl; or
(c) if exactly one of R1-R3 is an aryl-substituted or aromatic acyl group, the remaining two substituted groups are a C1-C10 alkyl; or
(d) each of R1-R3 is a C1-C10 alkyl.