Abstract:
A lubricant comprises (1) a liquid polymeric organopolysiloxane having an average of 1,98-2,25 organic groups per silicon atom and (2) a minor proportion of a compound of formula : wherein m is O or a number up to 2 and R and R1 are aliphatic, alicyclic, aryl, aralkyl, alkaryl or heterocyclic radicles which may carry substituents such as halogen atoms. In examples, bis (trimethylsiloxy) dimethyl stannane is added to a methylchlorophenylpolysiloxane chain-stopped with trimethylsilyl groups and having inter-condensed dimethyl-siloxy groups and chlorinated phenyl-siloxy groups. The bis (trimethylsiloxy) dimethyl stannane is prepared by first reacting hexamethyl disiloxane with ammonium fluoride and sulphuric acid to give trimethyl fluorosilane and hydrolysing this to the corresponding silanol. The silanol is reacted with sodium to give trimethyl sodium silanolate which, on reaction with dimethyl tin dichloride, gives the bis (trimethyl siloxy) dimethyl stannane. Specification 586,187, 586,956 and 709,920 are referred to.ALSO:A lubricant, suitable for use under heavy load at elevated temperatures, comprises (1) a liquid polymeric organopolysiloxane having an average of 1.98-2.25 organic groups per silicon atom and (2) a minor proportion of a compound of formula: wherein m is 0 or a number up to 2 and R and R1 are aliphatic, alicyclic, aryl, aralkyl, alkaryl or heterocyclic radicles which may carry substituents such as halogen atoms. In examples, bis-(trimethylsiloxy) dimethyl stannane is added to organopolysiloxanes.
Abstract:
ORGANOPOLYSILOXANE COPOLYMERS ARE PREPARED BY THE PARTIAL HYDROLYSIS AND CONDENSATION OF A SILANOL CHAINSTOPPED POLYDIORGANOSILOXANE, AN AMINOALKYLTRIALKOXYSILANE, AND AN AMINOALKOXYALKYLTRIALKOXYSILANE. THESE COPOLYMERS ARE CONVERTED TO PARTIAL SALTS BY REACTION WITH WITH ALIPHATIC CARBOXYLIC ACIDS AND THE PARTIAL SALTS ARE USED IN DETERGENT RESISTANT POLISH FORMULATIONS OF IMPROVED RUB-OUT AND GLOSS.
Abstract:
1,154,479. Organosilicon polymers. GENERAL ELECTRIC CO. 14 Oct., 1966 [23 Dec., 1965], No. 46014/66. Headings C3S and C3T. Organosilicon polymers of the formula wherein M is Na or K, R is an alkyl radical of 1 to 3 C atoms, R 1 is a monovalent h.c. radical free of aliphatic unsaturation having not more than 7 C atoms, R 11 is H or R 1 , a = 3 to 8, x = 1 to 10, y = 0 to 150 and z = 0 to 150, can be made by reacting a sila-oxacycloalkane of the formula with from 0À5 to 1À1 moles per mole of silaoxacycloalkane of conc.H 2 SO 4 or oleum, with subsequent neutralization of the reaction product with a Na or K base. If desired, a diorganopolysiloxane may be added as a coreactant. The first step of the reaction is effected at 0‹ to 100‹ C., and the neutralization is effected in an aqueous medium, preferably at room temperature, after which water is removed and the polymer is obtained by solvent extraction. Examples describe the above preparation of the polymers, and in Example (1) there is also obtained a disiloxane of the formula Uses: as cosmetic and general surfactants, and as self-emulsifying organosilicon materials.
Abstract:
A lubricant comprises a liquid lubricating material and a minor proportion of a compound of formula wherein n is a number up to 1000 and R and R1 are aliphatic, alicyclic, aryl, aralkyl, alkaryl or heterocyclic radicles, which may carry substituents such as halogen atoms. The lubricating material may be a mineral or vegetable oil or a synthetic lubricant such as a polysiloxane. In examples, bischloromethyltetramethyldisiloxane is converted to the corresponding di-Grignard reagent by reaction with magnesium and diethyl ether, and this Grignard reagent is reacted with dimethyl tin dichloride. The reaction product is employed as an additive for mineral oil, polysiloxanes or di (2-ethylhexyl) sebacate (together with thiodiphenylamine as rust inhibitor and a methyl silicone oil as foam inhibitor). Specifications 586,187, 586,956 and 709,920 are referred to.ALSO:A lubricant, especially suitable for use under heavy load at high temperatures, comprises a liquid lubricating material and a minor proportion of a compound of formula: wherein n is a number up to 1000 and R and R1 are aliphatic, alicyclic, aryl, aralkyl, alkaryl or heterocyclic radicles, which may carry substituents such as halogen atoms. The lubricating material may be a mineral or vegetable oil or a synthetic lubricant such as a polysiloxane. In examples, bischloromethyltetramethyldisiloxane is converted to the corresponding di-Grignard reagent by reaction with magnesium and diethyl ether, and this Grignard reagent is reacted with dimethyl tin dichloride. The reaction product is employed as an additive for mineral oil, polysiloxanes or di(2-ethylhexyl) sebacate (together with thiodiphenylamine as rust inhibitor and a methyl silicone oil as foam inhibitor). Specifications 586,187, 586,956 and 709,920 are referred to.