Patent ID: 7897704
Filing Date: 2011-03-01
Classification: C08G,C09D,Y10T

Abstract:
1. A protective crosslinkable coating composition comprising modified epoxy resin and crosslinker, the modified epoxy resin being the reaction product of i) from 80 to 99.9 parts of di-epoxy resin of epoxy equivalent weight from 500 to 5000 and formed from the reaction of bisphenol A diglycidyl ether and bisphenol ii) from 0.1 to 20 parts by weight of a reactive material characterised in that a) the di-epoxy resin contains minor amounts of resin components of molecular weight less than 1000 Daltons and the reactive material comprises b) a mono-functional organic material of molecular weight at least 100 Daltons having one moiety capable of reacting with the epoxy moieties of the di-epoxy resin and c) a dicarboxylic acid of molecular weight less than 300 Daltons having two moieties capable of reacting with the epoxy moieties of the di-epoxy resin and where the ratio of mono-functional organic material to dicarboxylic acid calculated on a molar basis is from 3:1 to 12:1.