Process for the preparation of polyester polyols and/or polyeste

Details Process for the preparation of polyester polyols and/or polyeste Process for the preparation of polyester polyols and/or polyeste

1982-12-23

1984-06-05

Hollrah, Glennon H.

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

Organic compounds

Carboxylic acid esters

560 91, 560 93, 568 46, C07C 6726

Patent

active

044529970

ABSTRACT:
Polyester polyols and/or polyester-polyether polyols are prepared by reacting polyols preferably di- to hexafunctional polyether polyols with hydroxyl numbers of 30 to 200 with at least one carboxylic anhydride, preferably glutaric anhydride, resulting in a carboxylic acid half ester which is subsequently oxyalkylated with at least one alkylene oxide, preferably ethylene oxide in the presence of at least 1 thiodialkylene glycol, preferably thiodiethylene and/or thiodipropylene glycol.

REFERENCES:
patent: 3459733 (1969-08-01), Byrd et al.
patent: 3494605 (1970-02-01), Rehfuss
patent: 3585185 (1971-06-01), Levis et al.
patent: 4144395 (1979-03-01), Murphy et al.

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