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US 4,014,771 AGranted
Highly reactive resin compositions hardenable by UV-light
AssigneeBayer Aktiengesellschaft
InventorsHans Jurgen Rosenkranz, Hans Rudolph, Artur Haus
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Abstract
A mixture which is hardenable by UV-light in an extremely short time comprising A. 30 - 95 % by weight of a reaction product of a polyepoxide and acrylic or methacrylic acid; B. 5 - 70 % by weight of a tri- to hexa-acrylic or methacrylic acid ester of a tri- to hexahydric alcohol or their mixtures and C. 0.2 - 10 % by weight, based on the sum of (A) and (B), of a conventional photoinitiator. The mixture is preferred used as binder for printing inks.
Claims3
A mixture hardenable by UV light comprising
- A. 30-95% by weight of the reaction product of at least one epoxide having more than one epoxide group per molecule and acrylic acid, said reaction product containing about 0.6 to 1 mol of carboxyl groups per epoxide group;
- B. 5-70% by weight of at least one tris-, tetra-, penta- or hexaacrylic or tris-, tetra-, penta- or hexamethacrylic acid ester of at least one trihydric, tetrahydric, pentahydric or hexahydric alcohol and
- C. 0.2-10% by weight, based on the weight of (A) and (B), of a photoinitiator of the formula ##STR3## wherein Ar is phenyl or said phenyl mono-substituted by alkyl, alkoxy or halogen;
- R.sub.1 is alkyl having from 1 to 12 carbon atoms, cyclohexyl, tetrahydropyranyl or 1-methoxyethyl and R.sub.2 is allyl, benzyl, halobenzyl or --CH.sub.2 --CH.sub.2 --X wherein X is CN, CONH.sub.2, or COOR.sub.3 wherein R.sub.3 is hydrogen or alkyl having 1 to 10 carbon atoms.
1 more element
Dependencies are inferred from the claim text.