Production of polyether polyol compositions

Details Production of polyether polyol compositions Production of polyether polyol compositions

1976-12-16

1979-08-28

Brown, Johnnie R.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

568620, 521174, 536 1, 536120, C07H 1508, C07C 4100

Patent

active

041661729

ABSTRACT:
An improved method for the production of polyether polyol compositions is disclosed wherein a polyhydric initiator is oxyalkylated with alkylene epoxides at lower temperatures in the presence of an aqueous ammonia solution. The polyether polyol compositions produced have desirable hydroxyl numbers and low viscosities and are particularly useful in the production of excellent rigid polyurethane foams. In addition to catalyzing the reaction, the nitrogen containing moiety itself undergoes oxyalkylation during the process such that the polyether polyol compositions produced contain, admixed therewith, various alkoxyalkanol amines. The alkoxyalkanol amines having reactive hydroxyl groups and acting as a mild catalyst for the polyolisocyanate reaction need not be removed from the polyether polyol composition. In addition, the alkoxyalkanol amines increase the blending compatibility of the polyether polyol compositions.

REFERENCES:
patent: 3317508 (1967-05-01), Winquist et al.
patent: 3332934 (1967-07-01), Booth et al.
patent: 3346557 (1967-10-01), Patton, Jr. et al.
patent: 3357970 (1967-12-01), Ulyatt
patent: 3391196 (1968-07-01), Earing et al.
patent: 3445525 (1969-05-01), Bormann et al.
patent: 3748201 (1973-07-01), Jordan

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