Catalyst for curing epoxides

Details Catalyst for curing epoxides Catalyst for curing epoxides

2008-06-06

2011-11-08

Wu, David W (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

C525S403000, C525S408000, C525S410000, C525S461000, C525S523000, C528S403000, C528S405000, C528S418000, C528S421000, C528S423000, C548S335100

Reexamination Certificate

active

08053546

ABSTRACT:
The use of 1,3-substituted imidazolium salts of the formula Iin whichR1 and R3 independently of one another are an organic radical having 1 to 20 C atoms,R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring,X is an anion having a pKbof less than 13 (measured at 25° C., 1 bar in water or dimethyl sulfoxide), andn is 1, 2 or 3,with the exception as imidazolium salts of 1-ethyl-2,3-dimethylimidazolium acetate and 1-ethyl-2,3-dimethylimidazolium acetate-acetic acid complex,as latent catalysts for curing compositions comprising epoxy compounds.

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