| 摘要 |
1492919 Coating compositions from modified epoxy resins BAYER AG 26 July 1976 [30 July 1975] 31025/76 Headings C3B and C3P A coating composition comprises, as binder, the product obtained by reacting: (I) one epoxide equivalent of a polyepoxide containing more than one epoxy group per molecule; (II) 0À01-0À5 NH-equivalents of ammonia, a (cyclo)-aliphatic primary or secondary amine or an aminocarboxylic acid (or mixtures thereof); and subsequently (III) 0À4-0À9 carboxyl equivalents of (meth)acrylic acid (or mixtures thereof); and finally (IV) 0À09-0À50 carboxyl equivalents of a saturated (cyclo)aliphatic acid or aromatic acid (or mixtures thereof). At least 80% of the epoxide equivalents of I are reacted during the above reaction sequence. I may be a diglycidyl ether of bisphenol A. Examples of reactants II are hexamethylene diamine and #-aminocaproic acid. IV may be acetic acid ethylhexanoic acid, adipic acid or hexahydrobenzoic acid. From 0À001-0À1% by wt. (based on the binder) of a polymerization inhibitor or antioxidant may be present, typical examples being benzoin derivatives disclosed in German Offenlegungsschrift No. 1,769,854. One or more ethylenically unsaturated monomers may also be present, e.g. acrylic acid, 1,4-butane diol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate and trimethylol propane triacrylate. Inert solvents may also be present. The coating compositions may be cured by ultraviolet radiation, electron beams or free radical catalysts. Specification 1,456,486 is referred to. |
