Sulfur-modified polypropylene ether glycols, a method for prepar

Details Sulfur-modified polypropylene ether glycols, a method for prepar Sulfur-modified polypropylene ether glycols, a method for prepar

1981-07-07

1983-02-08

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

Patent

active

043730841

ABSTRACT:
Polypropylene ether glycol is modified so that it contains 1-25%, by weight of .beta.,.beta.'-dihydroxyalkyl sulfide moieties.
These modified polypropylene ether glycols have enhanced resistance to degradation by heat and oxygen.
The invention also relates to a method of making the modified PPG's, to their use as stabilizers against the degradation of the polyether chain, and to polyurethanes made with them.

REFERENCES:
patent: 2582605 (1952-01-01), Richter et al.
patent: 2900368 (1959-08-01), Stilmar
patent: 2998413 (1961-08-01), Holtschmidt et al.
patent: 3005803 (1961-10-01), Holtschmidt et al.

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