Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1986-11-17
1989-03-28
Pertilla, Theodore E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
521159, 525452, 525459, 525460, 528 59, 528 61, 528 65, 528 76, 528 80, 558276, C08F28302
Patent
active
048165298
ABSTRACT:
Ester-modified poly(alkylene carbonate) polyahls comprising the residues of at least one polyahl, polyalkyleneoxy moieties, poly(alkylene carbonate) moieties, the residues of at least one ester of a carboxylic acid, and a plurality of active hydrogen end group are disclosed. The ester-modified poly(alkylene carbonate) polyahl has a number average molecular weight higher than the number average molecular weight of any known poly(alkylene carbonate) polyahl comprising the same monomeric components. Also disclosed are isocyanate-functional prepolymers of these ester-modified poly(alkylene carbonate) polyahls formed by reactions of the ester-modified poly(alkylene carbonate) polyahls of this invention with excess organic polyisocyanates. Urethane/urea polymers formed by the reactions of the isocyanate-functional prepolymers with polyahls are also disclosed. Also disclosed are urethane/urea polymers comprising the residue of at least one ester-modified poly(alkylene carbonate) polyahl of this invention, the residue of a polyisocyanate and the residue of at least one other polyahl selected from the group consisting of polyamines, polymercaptans and polyfunctional hydroxyl compounds. The novel compositions of this invention are useful in urethane/urea polymer applications such as foams, elastomers, plastics, adhesives, coatings and the like.
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Pertilla Theodore E.
The Dow Chemical Company
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