Isocyanate functional phase-stable MDI/polydiene urethane prepol

Details Isocyanate functional phase-stable MDI/polydiene urethane prepol Isocyanate functional phase-stable MDI/polydiene urethane prepol

1993-08-12

1996-06-25

Seidleck, James 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...

528 65, 528 67, 528 75, 528 85, C08G 1862

Patent

active

055300855

ABSTRACT:
Non-pearlescent, single phase, low viscosity, solvent-free isocyanate functional urethane prepolymer compositions from hydroxy-terminated diene polymers and excess diphenylmethane diisocyanate are obtained at reaction temperatures of 100.degree. C. or less when the diphenylmethane diisocyanate used in the composition includes at least 20% of the isomer 2.4'-diphenylmethane diisocyanate.

REFERENCES:
patent: 2877212 (1959-03-01), Seligman
patent: 3338861 (1967-08-01), Mastin et al.
patent: 3714110 (1973-01-01), Verdol et al.
patent: 4234714 (1980-11-01), Earing et al.
patent: 5077349 (1991-12-01), Fehlbier et al.
patent: 5212275 (1993-05-01), Slack et al.

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