0421298-A2 is referenced by 12 patents and cites 2 patents.

The present invention provides lubricant oil compositions comprising a polyalkylene glycol polycarbonate. The lubricant oil compositions are useful for industrial gear oil, automotive gear oil, and lubricant oil for refrigerators, rolling installations and fibers, which are excellent in lubricating properties and detergency. The present invention also relates to lubricant oil compositions which comprise a polyalkylene glycol polycarbonate having mutual solubility with an ozone layer-nondestructive Freon such as Freon R-134a, and which are accordingly especially suited for refrigerators using hydrogenated fluorocarbon as a refrigerant. A polyalkylene glycol polycarbonate according to the invention comprises a polyoxypropylene group in the molecular chain and an alkyl group and an alkyloxyalkylene group at the molecular terminals.; This invention provides a process for preparing said polyalkylene glycol polycarbonate wherein a polypropylene glycol and a carbonate are allowed to react, said reaction including condensation polymerization. The invention also provides a process without condensation polymerization for preparing a polyalkylene glycol polyol wherein a polyol and a carbonate is allowed to react in the presence of a basic catalyst while a produced alcohol is being distilled off, the catalyst is removed then, and the unreacted carbonate is eliminated.

Lubricant oil compositions.
Application Number
EP19900118684 19900928
Publication Number
0421298 (A2)
Application Date
September 28, 1990
Publication Date
April 10, 1991
Tanaka Masahide C O Mitsui Pet
Hayashi Tetsuo C O Mitsui Petr
Kiso Yoshihisa C O Mitsui Petr
Mizui Kinya C O Mitsui Petroch
Mitsui Petrochemical
C10M 107/34
C08G 64/18
C10M 171/00
C10M 107/00
C10M 105/00
C09K 05/00
C08G 64/00
C07C 67/00
C10M 171/00
C10M 107/32
C10M 105/48
C09K 05/04
C08G 64/18
C07C 67/00
C10M 107/20
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