Sulfur-modified copolyether glycols, a method for preparing them

Details Sulfur-modified copolyether glycols, a method for preparing them Sulfur-modified copolyether glycols, a method for preparing them

1981-07-07

1983-02-22

Cockeram, H. S.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

521174, 521177, 521914, 252182, 528 76, 568 46, 568 47, 568580, 568581, 568617, C08G 1852, C09K 300

Patent

active

043749704

ABSTRACT:
Copolyether glycols are modified so that they contain 1-25%, by weight of .beta.,.beta.'-dihydroxyalkyl sulfide moieties.
These modified copolyether glycols have enhanced resistance to degradation by heat and oxygen.
The invention also relates to a method of making the modified copolyether glycols, to their use as stabilizers against the degradation of the polyether chains, and to polyurethanes made with them.

REFERENCES:
patent: 2582605 (1952-01-01), Richter et al.
patent: 2900368 (1979-08-01), Stilmar
patent: 2998413 (1961-08-01), Holtschmidt et al.
patent: 3005803 (1961-10-01), Holtschmidt et al.
patent: 3425999 (1969-02-01), Axelrood et al.
patent: 4127513 (1978-11-01), Bellis

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