Highly reactive sulphur-containing coating agents hardening under UV-light
AssigneeBayer Aktiengesellschaft
InventorsKarl Ernst Schuster, Hans Jurgen Rosenkranz, Hans Rudolph
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Abstract
An air-drying coating composition comprising a reaction product of a polyepoxide with more than one 1,2-epoxide group per molecule, at least 60% of whose epoxide groups have been reacted A. with 0.01 to 0.6 SH-equivalents, based on one epoxide equivalent of hydrogen sulphide, an aliphatic or cycloaliphatic, aromatic or araliphatic dithiol or polythiol or with a mixture thereof, and subsequently B. with 0.99 to 0.4 carboxyl equivalents, based on one epoxide equivalent, of acrylic or methacrylic acid or of a mixture thereof.
Claims2
A process for the production of a reaction product of a polyepoxide and an .alpha.,.beta.-monoolefinically unsaturated carboxylic acid, wherein at least 60% of the epoxide groups of a polyepoxide with more than one 1,2-epoxide group per molecule are reacted
- a. with 0.01 to 0.6 SH-equivalents, based on one epoxide equivalent, of hydrogen sulphide, an aliphatic cycloaliphatic aromatic or araliphatic dithiol or polythiol or with a mixture thereof, and subsequently
- b. with 0.99 to 0.4 carboxyl equivalents, based on one epoxide equivalent, of acrylic or methacrylic acid or of a mixture thereof.
An air-drying coating composition comprising a reaction product of a polyepoxide with more than one 1,2-epoxide group per molecule, at least 60% of whose epoxide groups have been reacted
- a. with 0.01 to 0.6 SH-equivalents, based on one epoxide equivalent, of hydrogen sulphide, an aliphatic or cycloaliphatic, aromatic or araliphatic dithiol or polythiol or with a mixture thereof, and subsequently
- b. with 0.99 to 0.4 carboxyl equivalents, based on one epoxide equivalent, of acrylic or methacrylic acid or of a mixture thereof.
Dependencies are inferred from the claim text.