C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
44/19, 402/352,
C08G 65/48 (2006.01) C08G 65/38 (2006.01) C08G 75/14 (2006.01) C10L 1/24 (2006.01) C10M 151/04 (2006.01)
Patent
CA 1335923
Additives for improving the low temperature flow properties and oxidative stability of hydrocarbon oils are disclosed, which comprise the condensation reaction product of alkylated phenol and sulfurizing agent, wherein: (a) the polymer composition has a number average molecular weight of at least about 3,000 and a molecular weight distribution of at least about 1.5; (b) in the alkylated phenol reactant the alkyl groups (i) are essentially linear; (ii) have between 6 and 50 carbon atoms; and (iii) have an average number of carbon atoms between about 12 and 26; and (c) not more than about 10 mole percent of the alkyl groups on the alkylated phenol have less than 12 carbon atoms and not more than about 10 mole percent of the alkyl groups on the alkylated phenol have more than 26 carbon atoms. The additives may also be produced in a branched backbone form in which monomer reactants are copolymerized with certain tri- or tetrafunctional comonomers. Blends of these additives with various hydrocarbon oils, and particularly various middle distillates and lubricating oil compositions, whose low temperature flow properties and oxidative stability are significantly improved thereby, are also disclosed.
577265
Jaruzelski John Jan
Martella David John
Borden Ladner Gervais Llp
Exxon Chemical Patents Inc.
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