Manufacture of polyols and rigid polyurethane foam using thiodia

Details Manufacture of polyols and rigid polyurethane foam using thiodia Manufacture of polyols and rigid polyurethane foam using thiodia

1984-07-18

1985-08-20

Cockeram, Herbert S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252182, 521173, 560 87, C08G 1814, C08G 1842, C09K 300

Patent

active

045365229

ABSTRACT:
The present invention is directed to the manufacture of polyols and polyurethanes using thiodialkylene glycols. More particularly, the present invention is directed to the manufacture of rigid polyurethane foam using novel polyols prepared by forming a condensation product of a polyethylene terephthalate with a low molecular weight glycol having a molecular weight of about 500 or less and a thiodialkylene glycol such as thiodiethylene glycol. The present invention is also directed to the use of thiodialkylene glycols as cross linking agents in the preparation of polyurethane foam from condensation products prepared by digesting a polyethylene terephthalate with a polyol having a molecular weight of about 500 or less such as a glycol or a triol.

REFERENCES:
patent: 2729618 (1956-01-01), Mueller et al.
patent: 4048104 (1977-09-01), Svoboda et al.
patent: 4065410 (1977-12-01), Schaefer et al.
patent: 4223068 (1980-09-01), Carlstrom et al.
patent: 4371687 (1983-02-01), Robinson
patent: 4373084 (1983-02-01), Robinson
patent: 4417001 (1983-11-01), Svoboda et al.
patent: 4469824 (1984-09-01), Grigsby, Jr. et al.

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