US Patent No: 4,967,029

Number of patents in Portfolio can not be more than 2000

Liquid lubricants from alpha-olefin and styrene copolymers

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Abstract

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Alpha-olefins such as 1-decene are copolymerized with vinylaromatic monomers, especially styrene or the alkylstyrenes, to produce liquid lubricant oligomers having a broad range of viscosities, high viscosity index(VI), improved thermal stability and additive solubility characteristics. The lubricant oligomers are random copolymers containing recurring units of 1-alkene and vinyl aromatic monomer in mole ratios between 2:1 and 500:1, but preferably between 5:1 and 100:1 and more preferably from about 10:1 to 50:1. The recurring 1-alkene units of the copolymer have a branch ratio of less than 0.19, indicative of a poly 1-alkene segment of the copolymer chain or backbone that is essentially linear. The copolymerization catalyst is a reduced Group VIB metal catalyst on porous support, preferably reduced chromium oxide on a silica support.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MOBIL OIL CORPORATIONNEW YORK, NY5053

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wu, Margaret M Skillman, NJ 99 1601

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Chevron Research Company (2)
4,211,665 Electrical apparatus insulated with a high fire point synthetic alkylaromatic fluid 29 1978
4,238,343 High fire point alkylaromatic insulating fluid 33 1978
 
Mobil Oil Corporation (2)
4,827,064 High viscosity index synthetic lubricant compositions 170 1988
4,827,073 Process for manufacturing olefinic oligomers having lubricating properties 128 1988
 
Du Pont Canada Inc. (1)
4,547,473 Process for the preparation of polymers of alpha-olefins at high temperatures 9 1983
 
National Starch and Chemical Corporation (1)
4,604,491 Synthetic oils 47 1984
 
Nippon Oil Co., Ltd. (1)
4,714,794 Synthetic oils 27 1987
 
Phillips Petroleum Company (1)
4,681,866 Polymerization catalyst, method of making and use therefor 17 1986
 
STAMICARBON B.V. (1)
4,504,592 Polymerization catalyst for the preparation of ethylene polymer 5 1983

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
The Procter & Gamble Company (7)
6,221,817 Conditioning shampoo composition 14 1996
6,007,802 Conditioning shampoo composition 7 1996
5,935,561 Conditioning shampoo compositions containing select hair conditioning agents 30 1996
5,932,202 Conditioning shampoo composition 9 1996
5,932,203 Conditioning shampoo compositions containing select hair conditioning esters 21 1996
5,756,436 Conditioning shampoo compositions containing select cationic conditioning polymers 40 1996
6,627,184 Conditioning shampoo compositions containing polyalphaolefin conditioner 5 2003
 
HUNTSMAN PETROCHEMCIAL CORPORATION (3)
5,169,550 Synthetic lubricant base stocks having an improved viscosity 3 1990
5,202,040 Synthetic lubricant base stocks by co-reaction of olefins and anisole compounds 17 1990
5,180,866 Process for preparing synthetic lubricant base stocks having improved viscosity from vinylcyclohexene and long-chain olefins 1 1991
 
HUNTSMAN CORPORATION (2)
5,030,791 Process for co-oligomerizing 1,3-di-isopropenyl benzene and alpha-olefins to prepare synthetic lubricant base stocks having improved properties 3 1990
5,171,904 Synthetic lubricant base stocks having an improved pour point 3 1990
 
BASELL POLYOLEFINE GMBH (1)
6,608,151 Method for producing supported chrome catalysts and the use thereof for the polymerization of olefins 2 2002
 
EXXONMOBIL OIL CORPORATION (1)
6,872,692 Synthetic hydrocarbon fluid 1 2002
 
MITSUI CHEMICALS, INC. (1)
6,214,779 Lubricating oil or lubricating oil composition and fuel oil composition 2 1998
 
Mobil Oil Corporation (1)
5,602,086 Lubricant compositions of polyalphaolefin and alkylated aromatic fluids 43 1996
 
TEXACO CHEMICAL COMPANY (1)
H001407 Synthetic lubricant base stocks by co-reaction of vinylcyclohexene and long-chain olefins 0 1990
 
Other [Check patent profile for assignment information] (1)
H1407 Synthetic lubricant base stocks by co-reaction of vinylcyclohexene and long-chain olefins 0 1990