C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
402/267, 260/479
C07C 69/74 (2006.01) C07C 69/54 (2006.01) C07F 9/535 (2006.01) C07F 9/54 (2006.01) C08G 59/42 (2006.01) C08G 59/68 (2006.01)
Patent
CA 1091690
ABSTRACT This invention concerns a process comprising reaction of a vicinal epoxide with a phenolic com- pound, a carboxylic acid, or a carboxylic acid an- hydride in presence of a catalyst corresponding to the formula Image wherein each R is a C1-20 hydrocarbyl radical, and R' is Image , where R1 is H or a C1-20 hydrocarbyl radical, R2 is H or C1-20 alkyl, R3 represents hydrogen, C1-20 alkyl, carboxy, or C1-20 alkoxycarbonyl; n is ? to 20 and A.THETA. is an anion. The invention also concerns a composition comprising an epoxy resin containing an average of more than one vicinal epoxy group per molecule and a catalyst as defined above. These catalysts are effective for selectively promoting the desired reactions to give high yields of products having excellent color. However, the catalysts are substantially unreactive with epoxy resins at ambient temperatures and are thus useful for the pre- paration of precatalyzed epoxy resin compositions.
245314
Cornell Martin C.
Doorakian George A.
Schmidt Dennis L.
Smart & Biggar
The Dow Chemical Company
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