Room-temperature-cured polyurethanes and polyureas

Details Room-temperature-cured polyurethanes and polyureas Room-temperature-cured polyurethanes and polyureas

1988-06-17

1989-10-17

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

4273855, 4273881, 4273897, 427393, 4273936, C08G 1818

Patent

active

048748315

ABSTRACT:
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 coatings 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.

REFERENCES:
patent: 4513133 (1985-04-01), Dominquez
patent: 4578446 (1986-03-01), House et al.
patent: 4584362 (1986-04-01), Leckart et al.
patent: 4663201 (1987-05-01), House et al.
patent: 4709003 (1987-11-01), Scott et al.
patent: 4714512 (1987-12-01), House et al.

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