Abstract:
Phenyl-containing organopolysiloxane fluids characterized by the formula, ##STR1## wherein Ph is phenyl, R is hydrogen, trimethylsilyl or mixtures thereof and wherein x and y have a value sufficient to provide a phenyl content of from about 7 weight percent to about 80 weight percent are provided. Also provided are polycarbonate compositions comprising these novel phenyl containing organopolysiloxane fluids.
Abstract:
There is provided a stable one-package silicone electronic junction coating composition comprised of a heat curable polyorganosiloxane composition which exhibits improved adhesion and catalyzed work-life and which is comprised of the reaction product of an olefinorganopolysiloxane, and an organohydrogenpolysiloxane, which is catalyzed by platinum metal and which is inhibited by a combination of agents comprised of ethylenically unsaturated isocyanurates and dialkylacetylenedicarboxylates.
Abstract:
The present invention provides a silicone hydraulic fluid which is particularly useful as an automotive brake fluid which is comprised of a polysiloxane base fluid having specified amounts of mono-, di-, and tri- functionality; which is combined with a hydrocarbonoxy functional silicone additive which provides advantageous low temperature characteristics. Other optional brake fluid additives can also be utilized.
Abstract:
There is provided by the present invention, a silicone fluid useful as a hydraulic fluid and more particularly useful as a brake fluid for vehicles.This silicone fluid comprises generally a linear diorganopolysiloxane having a viscosity at 25.degree. C of 20 to 500 centistokes. Various materials and additives can be added to such a silicone fluid so as to improve its properties as a hydraulic fluid.
Abstract:
A silicone polymer fluid useful as a brake fluid comprising a polymer or monomer having 0 to 100 mole percent of polymeric or monomeric units selected from P.sub.2 Si(OM).sub.2 units, ##EQU1## units and R.sub.2 SiO units. 0 to 100 mole percent of polymeric and monomeric units selected from RSi(OM).sub.3 units.Units. ##EQU2## units, ##EQU3## units, and RSiO.sub.3/2 units. 0 to 10 mole percent of units selected from the class consisting of (MO).sub.3 SiO.sub.1/2 units. (MO).sub.2 SiO units. (MO)SiO.sub.3/2 units and SiO.sub.2 units and 0 to 5 mole percent of units selected from R.sub.3 SiO.sub.1/2 units wherein the viscosity of the polymer may vary from 2 to 400 centistones at 25.degree.C. R is a monovalent hydrocarbon radical, M is selected from alkyl, alkoxy, alkylene, alkoxyalkyleneoxyalkylene and alkyl polyether substituent radicals, wherein the preferred substituent for M is 2-methoxy-2-ethoxy-ethylene or higher and R is preferably methyl.
Abstract:
SILYLORGANOMETALLOCENES SELECTED FROM THE CLASS OF (A) POLYMERS OF THE FORMULA,
(C5Q5)M(C5Q4)-CO-NH-R"-SI(-(R)A)-O((3-A)/2)
(B) COPOLYMERS HAVING UNITS OF THE FORMULA,
(R)B-SI-O((4-B)/2)
AND AT LEAST ONE UNIT OF (A), AND (C) DISILOXANES OF THE FORMULA,
((C5Q6)M(C5Q4)-CO-NH-R"-SI(-R)2)2-O
WHERE R IS A MONOVALENT HYDROCARBON RADICAL, R" IS A DIVALENT HYDROCARBON RADICAL, AND(C5Q4)M(C5Q5) IS AN ORGANOMETALLOCENE, WHERE Q IS SELECTED FROM HYDROGEN, AN ELECTRON DONATING ORGANIC RADICAL, AND AN ELECTRON WITHDRAWING ORGANIC RADICAL AND M IS A TRANSITION METAL, A IS A WHOLE NUMBER EQUAL FROM 0 TO 2 AND B IS A WHOLE NUMBER EQUAL FROM 0 TO 3. THESE SILYLORGANOMETALLOCENES ARE USEFUL AS ANTIOXIDANTS FOR ORGANOPOLYSILOXANE FLUIDS UNDER EXTREME OXIDATION CONDITIONS.
Abstract:
An improved preformulated internal green tire lubricant and bag release composition is disclosed which comprises a silicone fluid; an alkylene oxide polyol; a particulate solid for providing air bleed channels between the expanding pressure core and the green tire, the amounts of silicone fluid and polyol combined being present at a weight ratio of at least 0.6:1 with respect to the particulate solid; an organic hydrocarbon solvent; a thickening agent; a small effective amount of unsaturated fatty acid to improve lubricity and wet-out and sufficient suspension agents to provide a stabilized, non-settling suspension. A process for decreasing friction in the bag molding of tires using such a composition is also disclosed.
Abstract:
There is provided by the present invention, a silicone fluid useful as a hydraulic fluid and more particularly useful as a brake fluid for vehicles.This silicone fluid comprises generally a linear diorganopolysiloxane having a viscosity at 25.degree.C of 20 to 500 centistokes in combination with carboxylic acid anhydrides as water tolerance additives. Various materials and additives can be added to such a silicone fluid so as to improve its properties as a hydraulic fluid.
Abstract:
A silicone polymer fluid useful as a brake fluid comprising a polymer or monomer having 0 to 100 mole percent of polymeric or monomeric units selected from R.sub.2 Si(OM).sub.2 units, ##STR1## AND R.sub.2 SiO units, 0 to 100 mole percent of polymeric and monomeric units selected from RSi(OM).sub.3 units, ##STR2## AND RSiO.sub.3/2 units, 0 to 10 mole percent of units selected from the class consisting of (MO).sub.3 SiO.sub.1/2 units, (MO).sub.2 SiO units, (MO)SiO.sub.3/2 units and SiO.sub.2 units and 0 to 5 mole percent of units selected from R.sub.3 SiO.sub.1/2 units wherein the viscosity of the polymer may vary from 2 to 400 centistokes at 25.degree. R is a monovalent hydrocarbon radical, M is selected from alkyl, alkoxy, alkylene, alkoxyalkyleneoxyalkylene and alkyl polyether substituent radicals, wherein the preferred substituent for M is 2-methoxy-2-ethoxy-ethylene or higher and R is preferably methyl.
Abstract:
Phenyl-containing organopolysiloxane fluids characterized by the formula, ##STR1## wherein Ph is phenyl, R is hydrogen, trimethylsilyl or mixtures thereof and wherein x and y have a value sufficient to provide a phenyl content of from about 7 weight percent to about 80 weight percent are provided. Also provided are polycarbonate compositions comprising these novel phenyl containing organopolysiloxane fluids.