Liquid phase polyols which are alkylene oxide adducts of terepht

Details Liquid phase polyols which are alkylene oxide adducts of terepht Liquid phase polyols which are alkylene oxide adducts of terepht

1983-09-26

1984-11-27

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252182, 521 48, 521173, 528297, 5283081, 560 93, C08G 1814

Patent

active

044851960

ABSTRACT:
A mixture of aromatic polyester polyols useful in preparing rigid foams is described. The polyols are made by first reacting recycled polyethylene terephthalate (PET) scrap with an alkylene glycol to form a reaction product which is then reacted with an alkylene oxide, such as propylene oxide. The resultant mixture of aromatic polyester polyols is a homogeneous liquid which does not precipitate solids upon standing, as do some prior art PET-derived polyols.

REFERENCES:
patent: 4048104 (1977-09-01), Svoboda et al.
patent: 4223068 (1980-09-01), Carlstrom et al.
patent: 4246365 (1981-01-01), Wiedermann et al.
patent: 4439549 (1984-03-01), Brennan

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