Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic -co- compound
Patent
1995-08-09
1999-09-07
Diamond, Alan
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic -co- compound
252 68, 558266, 558276, 558265, C10M10726, C09K 504
Patent
active
RE0362930
ABSTRACT:
The present invention provides lubricant oil compositions comprising a polyalkylene glycol carbonate. 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 carbonate 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.
REFERENCES:
patent: 1845356 (1932-02-01), Sorensen
patent: 2379252 (1945-06-01), Muskat et al.
patent: 2385932 (1945-10-01), Muskat et al.
patent: 2387934 (1945-10-01), Muskat et al.
patent: 3627810 (1971-12-01), Chang
patent: 3657310 (1972-04-01), Frevel
patent: 3725455 (1973-04-01), D'Angelo et al.
patent: 4072704 (1978-02-01), Langdon
patent: 4146522 (1979-03-01), Heckles
patent: 4217298 (1980-08-01), Shikata et al.
patent: 4293503 (1981-10-01), Young
patent: 4512930 (1985-04-01), Romano et al.
patent: 4755316 (1988-07-01), Magid et al.
patent: 4948525 (1990-08-01), Sasaki et al.
patent: 5114605 (1992-05-01), Mizui et al.
patent: 5238590 (1993-08-01), Mizui et al.
patent: 5294356 (1994-03-01), Tanaka et al.
patent: 5326486 (1994-07-01), Mizui et al.
patent: 5384056 (1995-01-01), Tanaka et al.
Chemical Abstract in vol. 9, bridging pp. 2251-2252, Zemplen et al., Jun. 1915.
Chemical Abstract No. 54:10872g, Jun. 1960.
Chemical Abstract No. 56:14378c, Jun. 1962.
Dang et al, "Advantages of Fluoroformates as Carboxylating Reagents for Polar Reactants," The Journal of Organic Chemistry, 55(6), 1851-4, Mar. 16, 1990.
Hayashi Tetsuo
Kiso Yoshihisa
Mizui Kinya
Tanaka Masahide
Diamond Alan
Mitsui Chemicals Inc.
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