Polymer polyols from liquid terephthalic polyester polyols

Details Polymer polyols from liquid terephthalic polyester polyols Polymer polyols from liquid terephthalic polyester polyols

1984-10-09

1986-02-04

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524761, 252182, 528 48, 528 66, 528 76, C08L 7506

Patent

active

045687170

ABSTRACT:
Polymer polyols made by reacting a liquid terephthalic polyester polyol with an organic polyisocyanate in the presence of a polyether polyol solvent are described. The liquid terephthalic polyester polyol may be made by reacting residue or scrap polyethylene terephthalate (PET) with an oxyalkylene glycol. The oxyalkylene glycol is preferably either diethylene glycol alone or a mixture of diethylene glycol and at least one other oxyalkylene glycol. The liquid terephthalic polyester polyol is preferably distilled to remove ethylene glycol. The polymer polyols of this invention are useful in the reaction with polyisocyanates to make polyurethane elastomers and flexible foams.

REFERENCES:
patent: 4442237 (1984-04-01), Zimmerman et al.
patent: 4469824 (1984-09-01), Grigsby et al.

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