Color stable urethane prepolymer

Details Color stable urethane prepolymer Color stable urethane prepolymer

1988-02-18

1989-03-21

Hoke, Veronica P.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

524101, 524109, 524114, 528 48, 528 53, C09K 300, C08K 515

Patent

active

048141038

ABSTRACT:
The present invention is directed to the stabilization of a prepolymer based on methylene diphenyl isocyanate rich in the 2,4'-isomer. It was surprisingly found that the color stability, viscosity and aging characteristics of the prepolymer are improved markedly upon the incorporation therewith of a combination of a certain epoxide compound and a hindered phenol.

REFERENCES:
patent: 2885420 (1959-05-01), Spiegler
patent: 2915496 (1959-12-01), Swart
patent: 2950307 (1960-08-01), France et al.
patent: 3226411 (1965-12-01), Smith
patent: 3707527 (1972-12-01), Budnowski et al.
patent: 3715381 (1973-02-01), Spaunburgh et al.
patent: 3828005 (1974-08-01), Pittman
patent: 4064157 (1977-12-01), Nafziger et al.
patent: 4076764 (1978-02-01), Bauer
patent: 4677154 (1987-06-01), Narayan et al.

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