Low free toluene diisocyanate polyurethanes

Details Low free toluene diisocyanate polyurethanes Low free toluene diisocyanate polyurethanes

1989-11-01

1991-12-31

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...

528 65, 528 67, C08G 1812

Patent

active

050773712

ABSTRACT:
A low-free toluene diisocyanate prepolymer is formed by reaction of a blend of the dimer of 2,4-toluene diisocyanate and an organic diisocyanate, preferably isomers of toluene diisocyanate, with high molecular weight polyols and optional low molecular weight polyols. The prepolymer can be further reacted with conventional organic diamines or organic polyol curatives to form elastomeric polyurethane/ureas or polyurethanes.

REFERENCES:
patent: 3998794 (1976-12-01), Muller
Sint. Nov. Modif. Elastomerov pp. 76-82, Belov et al., English Abstract Only (Russian) 1983.
Semendua et al., Kauch. Rezina (7) 24-26, English Abstract Only (Russian) 1985.

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