Patent GB-1039922-A (GB)
Title: Organosilicon lubricant compositions
IPC: C08G77/00
Filed: 1963-01-22
Abstract: A lubricant composition comprises 0.01-10 parts by weight of a copolymer comprising (1) at least one siloxane block comprising at least two siloxane groups of formula <FORM:1039922/C4-C5/1> where R is a monovalent hydrocarbon radical, a halogen substituted monovalent hydrocarbon radical or divalent hydrocarbon radical and b is 1, 2 or 3 said siloxane block having at least one divalent hydrocarbon radical represented by R and (2) at least one polyoxyalkylene block comprising at least two oxyalkylene groups of formula [-R1O-], where R1 is an alkylene radical, each siloxane block being linked to each polyoxyalkylene block by divalent radical R, and 100 parts by weight of a silicon-free liquid lubricant base selected from (a) polyoxyalkylene compounds of formula G111(OG11)nG111, where G111 is a hydrogen atom or monovalent hydrocarbon radical free of aliphatic unsaturation, G11 is an alkylene radical containing at least two carbon atoms and n is an integer having a value of at least 4 or (b) dialkyl esters of aliphatic dicarboxylic acids or (c) hydrocarbon lubricating oils.  The siloxane block may also contain at least one group of formula <FORM:1039922/C4-C5/2> where R is as above, e is 0, 1 or 2, f is 1 or 2 and (e+f) is 1, 2 or 3.  The composition may include 0.1-5 parts by weight of an amino-organo (hydrocarbonoxy) silane or an amino-organosiloxane where the organo group is a divalent hydrocarbon radical containing at least 3 carbon atoms and the amino group is connected to silicon through at least three successive carbon atoms of the organo group; an alkali metal salt of a carboxy-alkylsiloxane where the alkyl group contains at least 2 carbon atoms and the carboxy group is linked to silicon through at least two successive carbon atoms of the alkyl group; an alkenyl succinic acid, or anhydride thereof; a dialkyl acid phosphate; sorbitan mono-oleate, butyl stearate, butyl naphthenate or aluminium stearate.  The composition may also include alkylamine salts of acid alkyl esters of phosphoric acid in which the amine salt constitutes at least 25% by weight, neutral aryl and alkyl aryl phosphates, quinizarin, alizarin, purpurxanthrene, anthrarufing, chrysazin, di-alkyl selenides, amino antioxidants, e.g. N-phenyl naphthylamines and N,N1 - bis - dinaphthyl - para - phenylene diamine, hydroxy substituted aromatic compounds, e.g. 2,6-di-tert-butyl - meta - cresol, aryloxy - substituted phenols such as 2-tert-butyl-4-phenoxy phenol, trihydric phenols such as pyrogallol, dihydric phenols such as 4-phenyl catechol and 2,5-di(tert-butyl) hydroquinone, di-(hydroxyphenol) alkanes such as bis-(2-hydroxy-3-tert-butyl-methyl phenol) methane, dihydric naphthols, hydroxyl-substituted aryl amines, aralkoxy-substituted phenols such as hydroquinone monobenzyl ether and dialkoxy substituted aromatic compounds such as hydroquinone dimethyl ether.  Greases may be prepared by adding thickeners, e.g. fumed silica, silica aerogel, alumina, titanic, iron oxide and lithium stearate, hydroxy stearate, myristate or octoate.ALSO:A lubricant composition comprises 0.01-10 parts by weight of a copolymer comprising (1) at least one siloxane block comprising at least two siloxane groups of formula <FORM:1039922/C3/1> where R is a monovalent hydrocarbon radical, a halogen substituted monovalent hydrocarbon radical or divalent hydrocarbon radicals and b is 1, 2 or 3 said siloxane block having at least one divalent hydrocarbon radical represented by R and 100 parts of (2) at least one polyoxyalkylene block comprising at least two oxyalkylene groups of formula [-R1O-] where R1 is an alkylene radical, each siloxane block being linked to each polyoxyalkylene block by divalent radical R, and 100 parts by weight of polyoxyalkylene compounds of formula G111(OG11)nG111, where G111 is a hydrogen atom or monovalent hydrocarbon radical free of aliphatic unsaturation, G11 is an alkylene radical containing at least two carbon atoms and n is an integer having a value of at least 4. The siloxane block may also contain at least one group of formula <FORM:1039922/C3/2> where R is as above, e is 0, 1 or 2, f is 1 or 2 and (e + f) is 1, 2 or 3.  The composition may include 0.1-5 parts by weight of an aminoorgano (hydrocarbonoxy) silane or an aminoorganosiloxane where the cyano group is a divalent hydrocarbon radical containing at least 3 carbon atoms and the amino group is connected to silicon through at least three successive carbon atoms of the organo group; an alkali metal salt of a carboxyalkysiloxane where the alkyl group contains at least 2 carbon atoms and the carboxy group is linked to silicon through at least two successive carbon atoms of the alkyl group; an alkenyl succinic acid, or anhydride thereof; a dialkyl acid phosphate; sorbitan mono-oleate, butyl stearate, butyl naphthenate or aluminium stearate.  The composition may also include alkylamine salts of acid alkyl esters of phosphoric acid in which the amine salt constitutes at least 25% by weight, neutral aryl and alkyl aryl phosphates, quinezarin, alizarin, purpurscanthene, anthrarufin, chrysazin, dialkyl selenides, amino antioxidants, e.g. N-phenyl naphthylamines and N,N1 - bis - dinaphthyl - para - phenylene diamine, hydroxy substituted aromatic compounds, e.g. 2,6-di-tert-butyl-metal-cresol, aryloxy-substituted phenols such as 2-tert-butyl-4-phenoxy phenol, trihydric phenols such as pyrogallol, dihydric phenols such as 4-phenyl catechol and 2,5-di-(tert-butyl) hydroquinone, di-(hydroxyphenol) alkanes such as bis-(2-hydroxy - 3 - tert - butyl - methyl phenol) methane, dihydric naphthols, hydroxyl-substituted aryl amines aralkoxy-substituted phenols such as hydroquinone monobenzyl ether and dialkoxy substituted aromatic compounds such as hydroquinone dimethyl ether. Greases may be prepared by adding thickeners, e.g. fumed silica, silica aerogel, alumina, titania, iron oxide and lithium stearate, hydroxy stearate, myristate or octoate.