Novel aromatic polyester polyol mixtures made from polyethylene

Details Novel aromatic polyester polyol mixtures made from polyethylene Novel aromatic polyester polyol mixtures made from polyethylene

1982-11-22

1984-03-27

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, 521172, 521173, 528297, 5283081, 560 93, C08G 1814

Patent

active

044395493

ABSTRACT:
Mixtures of aromatic polyols containing ester functionalities suitable for use in rigid polyurethane and polyisocyanurate foams are described. The mixtures are prepared by reacting a polyethylene terephthalate (PET) residue with an alkylene oxide in the presence of a basic catalyst. These novel polyol mixtures may be blended with conventional polyols to yield rigid foams with better flammability resistance as compared with foams made from conventional polyols alone.

REFERENCES:
patent: 3641112 (1972-02-01), Ichikawa et al.
patent: 4394286 (1983-07-01), Millick

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