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...
Patent
1988-11-21
1990-01-09
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 64, 528 76, 528 83, C08G 1810
Patent
active
048929204
ABSTRACT:
This invention relates to a polyisocyanate prepolymer for polyurethane and polyurethane/urea elastomer synthesis and to the resulting elastomer. The prepolymer is formed by reacting a cyclohexanediisocyanate with a long chain polyol under conditions such that essentially a 2:1 adduct is formed. Excess cyclohexanediisocyanate is removed prior to forming the elastomer.
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Wong, et al., "Reactivity Studies and Cast Elastomers Based on Transcyclohexane 1,4-Diisocyanate and 1,4 Phenylene Diisocyanate," pp. 75-92.
Casey Jeremiah P.
Quay Jeffrey R.
Air Products and Chemicals Inc.
Brewer Russell L.
Marsh William F.
Simmons James C.
Welsh Maurice J.
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