Method of making lactone-epoxide copolymer polyols

Details Method of making lactone-epoxide copolymer polyols Method of making lactone-epoxide copolymer polyols

1979-03-14

1981-09-22

Nielsen, Earl A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528354, 560185, 560186, C08G 6308, C08G 6310

Patent

active

042911559

ABSTRACT:
The invention concerns a method for the manufacture of polyols, principally utilizable in the synthesis of polyurethanes, which are ester/ether copolymers with hydroxylated terminal groups obtained by the direct copolymerization of a lactone and a vicinal epoxide in the presence of a chain initiator possessing at least two labile hydrogen atoms per mole and of an alkaline catalyst.

REFERENCES:
patent: 2962524 (1960-11-01), Hostettler et al.
patent: 3689531 (1972-09-01), Critchfield et al.
patent: 3726887 (1973-04-01), Pohl et al.
patent: 3795701 (1974-03-01), Jenkins et al.
Yamashita et al., "Anionic Copolymerization of .beta.-Lactones", Die Makromolekulare Chemie 113, pp. 139-146 (1968).

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