Agents curable by ultraviolet radiation
AssigneeBASF SE
InventorsGerd Rehmer, Andreas Boettcher
Life of this patent
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Abstract
Agents which are curable by ultraviolet radiation are based on a binder formulation of (1) from 99.0 to 20% by weight of a copolymer, (2) from 1.0 to 80% by weight of monoolefinically unsaturated compounds and (3) from 0.0 to 20% by weight of polyolefinically unsaturated compounds. The agents contain copolymers (1) which are obtainable by subjecting a mixture of (A) from 80 to 99.9% by weight of olefinically unsaturated monomers, (B) from 0 to 10% by weight of a copolymerizable olefinically unsaturated photoinitiator and (C) from 0 to 10% by weight of a polymerization-regulating photoinitiator to free radical polymerization, the sum of (B) and (C) being not less than 0.1% by weight and the stated percentages by weight being based on the sum of the weights of (A)+(B)+(C).
Claims13
A composition which is curable by ultraviolet radiation and is based on a binder formulation of:
- 1) from 99.0 to 20% by weight of a copolymer,
- 2) from 1.0 to 80% by weight of monoolefinically unsaturated compounds, and
- 3) from 0 to 20% by weight of polyolefinically unsaturated compounds,
- wherein the composition contains a copolymer (1) which is obtainable by subjecting to a free-radical-initiated polymerization a mixture of:
- (A) from 20 to 99.9% by weight of olefinically unsaturated monomers,
- (B) from 0 to 10% by weight of a copolymerizable olefinically unsaturated photoinitiator,
- (C) from 0.1 to 10% by weight of a polymerizationregulating initiator selected from the group consisting of 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropane-1-one, isopropyl thioxanthone, 4-isopropylbenzophenone, ethyl2,4,6-trimethylbenzo-ylphenylphosphinate, isopropyl benzoin ether, 2,2-diethoxyacetophenone and ethyl benzoin ether;
- which initiator reduces the degree of polymerization of the copolymer (1) during the free-radical-initiated polymerization, the sum of (B) and (C) being not less than 0.1% by weight and the stated percentages being based on the sum of the weights of (A)+(B)+(C).
Dependencies are inferred from the claim text.