QUATERNARY AMMONIUM CARBOXYLATE INTERNAL SALT COMPOSITION AS CATALYST WITH CONTROLLED ACTIVITY FOR PRODUCTION OF POLYURETHANE FOAM

摘要

Prepn. comprises reacting a polyisocyanate and a polyol in the presence of a blowing agent, cell stabiliser and a catalyst compsn., with a quat., ammonium carboxylate inner salt of formula R2-R1-N(+)-R3-R'4-CO2(-) (I), where R1, R2 and R3 are 1-12C alkyl, 5-8C cycloalkyl, 6-10C aryl or an alkyl, cycloalkyl or aryl contg. a heteroatom, alternately R1 and R2 or R1, R2 and R3 form a ring system with N atom, and R4 is divalent R1. Pref. R1, R2 and R3 can be methyl, ethyl, propyl, butyl, lauryl, N,N-dimethylaminoethyl, N,N-dimethylaminopropyl, cyclopentyl, cyclohexyl, phenyl or p-tolyl; R1 and R2 can form piperidine, morpholine or imidazole with a N atom; or R1, R2 and R3 can form triethylenediamine, 3-quinuclidinol or 1,8-diazabicyclo(5,4,0)undec-7-ene with an N atom; and R4 is methylene, ethylene, propylene or phenylene.