Organosiloxane compositions

Abstract

A copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane obtainable by reacting a dispersion of ingredient (i) an alkylfluoroalkyl siloxane and ingredient (ii) one or more polyalkylphenyl siloxane(s) in the presence of ingredient (iii) a basic catalyst at a temperature of between 40° C. to 300° C.

1 . A copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane, the copolymer prepared by reacting a dispersion of:
 ingredient (i) an alkylfluoroalkyl siloxane comprising units of the following structure;   
       
         
           
           
               
               
           
         
       
       where each R is independently selected from an alkyl group having from 1 to 6 carbon atoms, n is an integer, x is zero or an integer from 1 to 6, and R 1  is a perfluoroalkyl group which is either linear or branched; and
 ingredient (ii) one or more polyalkylphenyl siloxane(s) comprising units of the following structure; 
 
       
         
           
           
               
               
           
         
       
       where each R 2  is independently selected from an alkyl group having from 1 to 6 carbon atoms and t is an integer; 
       in the presence of ingredient (iii) a basic catalyst at a temperature of between 40° C. to 300° C.;
 wherein ingredient (ii) comprises a trialkylsilyl terminated siloxane. 
 
     
     
         2 . (canceled) 
     
     
         3 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 1 , wherein the alkylfluoroalkyl siloxane is linear or branched and has viscosity of from 100 cst to 100,000 cst (100 mm 2 s −1  to 100,000 mm 2 s −1 ) at 25° C. with a capillary viscometer according to ASTM D445-06. 
     
     
         4 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 1 , wherein the alkylfluoroalkyl siloxane is cyclic and n is from 3 to 15. 
     
     
         5 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 1 , wherein R 1  is a perfluoroalkyl group which is either linear or branched and contains from 1 to 12 carbon atoms. 
     
     
         6 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 5 , wherein the perfluoroalkyl group is selected from perfluoromethyl, perfluoroethyl, perfluoro-n-propyl, perfluoro-iso-propyl, perfluoro-n-butyl, perfluoro-iso-butyl, perfluoro-tert-butyl, perfluoro-n-pentyl, perfluoro-isopentyl, perfluoroneo-pentyl, perfluorohexyl, perfluoroheptyl, perfluorooctyl, perfluorononyl, perfluorodecyl, perfluoroundecyl and perfluorododecyl or a mixture thereof. 
     
     
         7 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 1 , wherein the polyalkylphenyl siloxane has a viscosity of from 250 cst to 50,000 cst (250 mm 2 s −1  to 50,000 mm 2 s −1 ) at 25° C. with a capillary viscometer according to ASTM D445-06. 
     
     
         8 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 1 , wherein ingredient (i) and ingredient (ii) are intermixed in a ratio of from 10 weight % of ingredient (i):90 weight % of ingredient (ii) to 90 weight % of ingredient (i):10 weight % of ingredient (ii) based on the total weight of ingredient (i) and ingredient (ii) being 100 weight %. 
     
     
         9 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 1 , wherein ingredient (ii) is a mixture of polyalkylphenyl siloxanes including the trialkylsilyl terminated siloxane. 
     
     
         10 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 1 , wherein the basic catalyst is selected from one or more alkali metal hydroxides, alkali metal alkoxides or complexes of alkali metal hydroxides and an alcohol, alkali metal silanolates, tetra-alkyl phosphonium hydroxides and tetra-alkyl phosphonium silanolates, phosphonitrile halides, phosphazene bases and the catalyst derived by the reaction of a tetra-alkyl ammonium hydroxide and a siloxane tetramer. 
     
     
         11 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 10 , wherein the basic catalyst is potassium hydroxide. 
     
     
         12 . A lubricant consisting of the copolymer in accordance with  claim 1  and at least one additive. 
     
     
         13 . A lubricant comprising:
 the copolymer in accordance with  claim 1 ; and   one or more additives selected from friction modifiers, anti-wear additives, extreme pressure additives, seal swelling agents, rust and corrosion inhibitors, thickeners, Viscosity Index improvers, pour point depressants, anti-oxidants, free-radical scavengers, hydroperoxide decomposers, metal passivators, surface active agents, emulsifiers, demulsifiers, defoamants, compatibilizers, dispersants, and mixtures thereof and/or deposit control additives, film forming additives, tackifiers, antimicrobials, additives for biodegradable lubricants, haze inhibitors, chromophores, and limited slip additives.   
     
     
         14 . The lubricant in accordance with  claim 13 , comprising from 0.1 to 10 weight % of the additive(s) and 90 to 99.9 weight % of the copolymer. 
     
     
         15 . A lubricant grease comprising:
 0 to 10 weight % of one or more additives (excluding thickeners);   1 to 55 weight % of thickeners; and   the remainder being the copolymer in accordance with  claim 1 .   
     
     
         16 - 25 . (canceled) 
     
     
         26 . A method for making a lubricant comprising mixing the copolymer in accordance with  claim 1  and one or more additives selected from friction modifiers, anti-wear additives, extreme pressure additives, seal swelling agents, rust and corrosion inhibitors, thickeners, Viscosity Index improvers, pour point depressants, anti-oxidants, free-radical scavengers, hydroperoxide decomposers, metal passivators, surface active agents, emulsifiers, demulsifiers, defoamants, compatibilizers, dispersants, and mixtures thereof and/or deposit control additives, film forming additives, tackifiers, antimicrobials, additives for biodegradable lubricants, haze inhibitors, chromophores, and limited slip additives. 
     
     
         27 . (canceled) 
     
     
         28 . A method to lubricate metal-metal or plastic-plastic surfaces comprising:
 obtaining the lubricant composition in accordance with  claim 13 ; and   lubricating the surface with the lubricant composition.   
     
     
         29 - 30 . (canceled) 
     
     
         31 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 9 , wherein ingredient (ii) comprises the trialkylsilyl terminated siloxane and a dialkylhydroxy terminated siloxane. 
     
     
         32 . The copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane in accordance with  claim 1 , wherein the copolymer is further prepared by stirring ingredients i) and ii) to form the dispersion and at least one of:
 heating the dispersion and holding the temperature between 100° C. and 300° C. during reaction;   sweeping the dispersion with nitrogen during reaction;   cooling the dispersion after reaction;   neutralizing the basic catalyst; and   stripping the dispersion after reaction.