Organosiloxane compositions

Patent metadata

Field	Value
Publication number	US-2018291299-A1
Application number	US-201816001650-A
Country	US
Kind code	A1
Filing date	Jun 6, 2018
Priority date	Nov 20, 2013
Publication date	Oct 11, 2018
Grant date	—

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.

First claim

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.

Assignees

• Dow Silicones Corp

Inventors

• Deklippel Lorry
• Ferritto Michael Salvatore
• Kleyer Don Lee
• Stammer Andreas
• Stoegbauer Herbert
• Weber Vesna

Classifications

• C10N2030/10

  Inhibition of oxidation, e.g. anti-oxidants · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2040/04

  Oil-bath; Gear-boxes; Automatic transmissions; Traction drives · CPC title

• C10N2040/02

  Bearings · CPC title