초록 ▼

The polyurethanes and polyureas resulting from ambient-temperature-curing isocyanate-terminated urethane prepolymers with N-alkyl-substituted aromatic polyamines and, optionally, with an added polyol, but primary amine-free, in the presence of a combination catalyst comprising an aliphatic carboxyli

The polyurethanes and polyureas resulting from ambient-temperature-curing isocyanate-terminated urethane prepolymers with N-alkyl-substituted aromatic polyamines and, optionally, with an added polyol, but primary amine-free, in the presence of a combination catalyst comprising an aliphatic carboxylic acid, e.g., adipic, stearic, oleic acids, and an organometallic catalyst containing, e.g., tin, mercury, bismuth, etc. are broadly useful as coating on the surface of objects made of metal, wood, glass, plastic or masonry materials such as concrete, bricks, etc. or as castings cured in situ. One-shot and quasi-prepolymer systems are also disclosed. The diamine N,N′-di-(sec-butyl)-4,4′-methylenedianiline is a particularly useful diamine.

대표청구항 ▼

A method for coating or patching pavement with a polyurethane or polyurea composition comprising applying to said pavement or cavity therein a coating composition comprising a backbone polyol or polyamine, a polyisocyanate and a primary amine-free curing composition comprising an aromatic alkyl-subs

A method for coating or patching pavement with a polyurethane or polyurea composition comprising applying to said pavement or cavity therein a coating composition comprising a backbone polyol or polyamine, a polyisocyanate and a primary amine-free curing composition comprising an aromatic alkyl-substituted secondary polyamine having a structure selected from the group consisting of [Figure] (1) [Figure] (2) [Figure] (3) [Figure] where R, R′, R1, R2 and R3 may be independently selected and are alkyl groups containing from 1 to about 20 carbon atoms, provided further that R2 may be H and one of R1 or R3 may, additionally, be H and n is an integer from 1 to about 10, in the presence of a catalytic composition comprising an organometallic catalytic compound, whereby the components of said coating composition will react at ambient conditions to form said polyurethane or polyurea composition.