Aromatic polyester polycarbonate polyols derived from polyethyle

Details Aromatic polyester polycarbonate polyols derived from polyethyle Aromatic polyester polycarbonate polyols derived from polyethyle

1983-05-05

1984-08-14

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

260463, 528271, 528272, 528361, 528370, 528371, 528405, C08G 1814

Patent

active

044657935

ABSTRACT:
A novel class of aromatic polyester polycarbonate polyols is described. The polycarbonate polyols are made by reacting an alkylene carbonate with a residue from polyethylene terephthalate (PET) manufacture over a polycarbonate formation catalyst such as potassium stannate. Use of a PET waste stream helps keep the cost of the polycarbonate polyols low. These materials can be used to replace the polyol portion in the preparation of polyisocyanurate foams.

REFERENCES:
patent: 3248414 (1966-04-01), Stevens
patent: 4267120 (1981-05-01), Cuscurida et al.

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