High molecular weight maleic copolymer adduct

摘要

A lubricating oil composition comprises a major proportion of a mineral lubricating oil and a minor proportion, e.g. 0.1-15%, of a maleic adduct. A fuel composition comprises an hydrocarbon base fuel and the maleic adduct, e.g. 0.0005-1.0%. The maleic adduct is the adduct of the copolymer of (A) one or more a -olefines of from 2-20 carbon atoms and (B) one or more diolefines of from 5-20 carbon atoms and having a terminal double bond, the mole ratio of (A):(B) being from 1:1 to 400:1, the copolymer having a molecular weight of from 10,000-1,000,000 and being of the Ziegler type, i.e. prepared in the presence of a catalyst comprising a mixture of a reducing and a reducible metal compound. A lubricating oil concentrate comprises a lubricating oil and up to 75% of the maleic adduct. The lubricating oil may be a paraffinic or naphthenic base oil or may be a synthetic oil, e.g. polymers of propylene and/or ethylene oxide, di-(2-ethylhexyl)-sebacate, tricresylphosphate, tetra-(2-ethyl-hexyl) - orthosilicate or hexa - (2 - ethyl butoxy) - disiloxane. The lubricant compositions may also contain 0.1-10% of a calcium (C12- 15 alkyl phenate, the reaction products of pinene or polybutene and P2S5, zinc butyl amyl dithiophosphate, zinc di-(tetradecylphenyl) dithiophosphate, calcium petroleum sulphonates and/or calcium naphthenates. The hydrocarbon fuel may be a distillate of b.p. 300-750 DEG F. or a gasoline of b.p. 50-435 DEG F. and may contain an alkylphenyl polyglycol ether, ethylene glycol monomethyl ether or glycerin as anti-icing agents and dinonyl naphthalene ammonium sulphonates as rust inhibitors.ALSO:A maleic adduct of the copolymer of (A) one or more a -olefines of from 2-20 carbon atoms and (B) one or more diolefines of from 5-20 carbon atoms and having a terminal double bond, the mole ratio of (A): (B) being from 1:1 to 400:1, the copolymer having a molecular weight of from 10,000-1,000,000 and being of the Ziegler type, i.e. prepared in the presence of a catalyst comprising a mixture of a reducing and a reducible metal compound. The copolymer may contain (A) units of formula -RCH-CH2-where R is H, a C1- 18 aliphatic hydrocarbon radical or its mixture and (B) units of formula where U is a C3- 18 unsaturated aliphatic hydrocarbon radical. The maleic adducting agent may be maleic anhydride or acid or their monochloro-substitution products. The a -olefine may be 1-dodecene and the diolefine may be 1,9-octadecadiene, or both olefines may be a mixture of cracked waxxolefines containing 10-20 carbon atoms and prepared by the thermal cracking of paraffin waxes. In an example, a mixture of cracked wax olefines containing 90% straight chain a -olefines and 6% of diolefines (i.e. 15:1 mole ratio) was copolymerized in a mixture of heptane and xylene using as catalyst the reaction product of TiCl3 and tri-isobutyl aluminium and the polymerization was stopped by addition of isopropyl alcohol.