초록 ▼

An improved silicone emulsifier composition is disclosed which is particularly useful for preparing thermally stable, solids-free invert emulsions for the deep well-drilling art. The emulsifier composition comprises a surface active polydiorganosiloxane bearing one or more polyoxyalkylene radicals a

An improved silicone emulsifier composition is disclosed which is particularly useful for preparing thermally stable, solids-free invert emulsions for the deep well-drilling art. The emulsifier composition comprises a surface active polydiorganosiloxane bearing one or more polyoxyalkylene radicals and one or more hydrocarbon radicals having from 6 to 18 carbon atoms and a resin component comprising (CH3)3SiO½siloxane units and SiO4/2 siloxane units. Improved invert emulsions and a method for their preparation are also disclosed. The invert emulsions comprise the improved silicone emulsifier of this invention as well as a brine discontinuous phase and a liquid hydrocarbon continuous phase.

대표청구항 ▼

An emulsifier composition consisting essentially of (a) from 30 to 90 percent by weight of a polydiorganosiloxane having the formula Z3SiO{(CH3)2SiO}x{(CH3)(R)SiO}y{(CH3)(Q)SiO}zSiZ3 wherein Q denotes a polyoxyalkylene radical having the formula －R′O(CH2CH2O)p(CH2CHCH3O)qR″, R denotes a monovalent h

An emulsifier composition consisting essentially of (a) from 30 to 90 percent by weight of a polydiorganosiloxane having the formula Z3SiO{(CH3)2SiO}x{(CH3)(R)SiO}y{(CH3)(Q)SiO}zSiZ3 wherein Q denotes a polyoxyalkylene radical having the formula －R′O(CH2CH2O)p(CH2CHCH3O)qR″, R denotes a monovalent hydrocarbon radical having from 6 to 18 carbon atoms, inclusive, R′denotes a divalent organic radical bonded to a silicon atom by a silicon-carbon bond, R″denotes a monovalent radical selected from the group consisting of hydrogen, alkyl, cycloaliphatic, aryl, arylalkyl and acyl radicals, Z denotes a monovalent hydrocarbon radical having from 1 to 5 carbon atoms, inclusive, or a Q radical, or an R radical, x has an average value of from 0 to 400, y has an average value of from 0 to 400, z has an average value of from 0 to 5, x+y+z has an average value of from 30 to 400, p has an average value equal to or greater than the average value of q and p+q has an average value sufficient to provide a formula weight of from 600 to 3500 for the －(CH2CH2O)p(CH2CHCH3O)q－portion of the Q radical, there being an average of at least one Q radical and an average of at least one R radical per molecule of the polydiorganosiloxane, and (b) from 10 to 70 percent by weight of a solid, benzene-soluble organopolysiloxane resin copolymer consisting essentially of (CH3)3SiO½siloxane units and SiO4/2 siloxane units, there being from 0.6 to 0.9, inclusive, of said (CH3)3SiO½siloxane units for every SiO4/2 siloxane unit. An emulsion composition comprising (A) 40 to 75 parts by volume of a brine as a discontinuous phase, (B) 25 to 60 parts by volume of a liquid hydrocarbon selected from the group consisting of paraffins having a flash point of at least 100°F., kerosene, diesel oil, crude oil, turbine fuel, mineral oil and gas oil as a continuous phase, (A) and (B) totaling 100 parts by volume and 100 parts by weight, (C) 1.0 to 10 parts by weight, for every 100 parts by weight of brine plus liquid hydrocarbon, of an emulsifier composition consisting essentially of (a) from 30 to 90 percent by weight of a polydiorganosiloxane having the formula Z3SiO{(CH3)2SiO}x{(CH3)(R)SiO}y{(CH3)(Q)SiO}zSiZ3 wherein Q denotes a polyoxyalkylene radical having the formula －R′O(CH2CH2O)p(CH2CHCH3O)qR″, R denotes a monovalent hydrocarbon radical having from 6 to 18 carbon atoms, inclusive, R′denotes a divalent organic radical bonded to a silicon atom by a silicon-carbon bond, R″denotes a monovalent radical selected from the group consisting of hydrogen, alkyl, cycloaliphatic, aryl, arylalkyl and acyl radicals, Z denotes a monovalent hydrocarbon radical having from 1 to 5 carbon atoms, inclusive, or a Q radical, or an R radical, x has an average value of from 0 to 400, y has an average value of from 0 to 400, z has an average value of from 0 to 5, x+y+z has an average value of from 30 to 400, p has an average value equal to or greater than the average value of q and p+q has an average value sufficient to provide a formula weight of from 600 to 3500 for the －(CH2CH2O)p(CH2CHCH3O)q－portion of the Q radical, there being an average of at least one Q radical and an average of at least one R radical per molecule of the polydiorganosiloxane, and (b) from 10 to 70 percent by weight of a solid, benzene-soluble organopolysiloxane resin copolymer consisting essentially of (CH3)3SiO½siloxane units and SiO4/2 siloxane units, there being from 0.6 to 0.9, inclusive, of said (CH3)3SiO½siloxane units for every SiO4/2 siloxane unit.