Patent GB-961569-A (GB)
Title: Novel polymeric compounds and hydrocarbon oil compositions containing them
Inventor: KIRBY PETER
IPC: C08F28/00
Filed: 1961-08-29
Abstract: An oil-soluble polymeric compound comprises a polysubstituted long chain alkane containing, attached to a plurality of carbon atoms of the alkane chain, a plurality of alkoxy-carbonyl radicals, and to different carbon atoms of the alkane chain a plurality of carbamate or thiocarbamate radicals. Preferred polymers are those containing monomer units of the formulae: <FORM:0961569/C3/1> <FORM:0961569/C3/2> wherein R1 stands for hydrogen or an alkyl group, R2 stands for an alkylene group which may be substituted with alkyl groups, R may be R2 or an alkylidyne group having attached an alkoxy-carbonyl radical, R3 stands for an alkyl group, R4 stands for hydrogen or a hydrocarbon group which may optionally contain a polar substituent, X stands for oxygen or sulphur and n is O or an integer. The polymers may be prepared by copolymerizing esters, e.g. lauryl acrylate and methacrylate, methyl methacrylate, dilauryl maleate, ethyl stearyl maleate or octyl crotonate, with an allyl, crotyl, oleyl or allyl carbinol ester of carbamic or thiocarbamic acid or N-substituted derivative thereof. The reaction may be carried out in solution, e.g. in xylene, toluene or hexane, and in the presence of a catalyst, e.g. benzoyl peroxide, di-t-butyl peroxide or azobisisobutyronitrile. Monomer and catalyst may be added during the course of the copolymerization. The examples describe the preparation of copolymers of: (1) allyl carbamate and lauryl methacrylate; and (2) allyl N-methylol carbamate and lauryl peroxide.ALSO:Oil compositions comprise a hydrocarbon base oil and a minor proportion of an oil-soluble polymeric compound which comprises a poly-substituted long chain alkane containing attached to a plurality of carbon atoms of the alkane chain, a plurality of alkoxy carbonyl radicals, and to different atoms of the alkane chain a plurality of carbamate or thiocarbamate chains, e.g. copolymers of (a) lauryl acrylate or methacrylate, methyl methacrylate, dilauryl maleate, ethyl stearyl maleate or octyl crotonate with (b) an allyl, crotyl, oleyl or allyl carbinol ester of carbamic or thiocarbamic acid. Specified copolymers are those of lauryl methacrylate with allyl carbamate or N-methylol carbamate. The hydrocarbon oil may be a fuel or a lubricating oil.  In addition to the polymeric additive, the oil compositions may contain castor or lard oil, copolymers of alkylene oxides and glycols, di-(2-ethylhexyl) sebacate, dioctylphthalate, polytetrahydrofurane, dimethyl silicone polymer, polymers of methacrylic esters, isobutylene and alkyl stipenes, coconut fatty acids, wax-naphthalene condensation products, sodium, lithium, diisopropylammonium and dicyclohexylammonium nitrites, tri-chloroethyl phosphite, tricresyl phosphate, " Di-Lorol " (Registered Trade Mark) phosphate, phosphorus pentasulphide-terpene reaction products, calcium and zinc dicyclohexyl-thiophosphates and methylcyclohexyl - thiophosphates, wax disulphides, ethylene bistolyl sulphide, octadecylamine, 2,6 - ditert. - butyl - 4 - methyl phenol, 2,21 - methylene bis - (4 - methyl - 6 - tert.-butylphenol) sodium, calcium and barium petroleum sulphonates, sodium, calcium, barium and zinc cetylphenates, and calcium, barium and zinc salts of octylphenol-formaldehyde condensation products.  The examples describe the addition to a mineral lubricating oil of lauryl methacrylate - allylcarbamate and lauryl methacrylateallyl N-methylol carbamate copolymers.