Patent ID: 8101279
Filing Date: 2012-01-24
Classification: B29C,B60C,C08G,C08J,C08L,Y10T

Abstract:
1. A composition comprising: (a) at least one nonreactive linear polyorganosiloxane oil having lubricating properties, having a dynamic viscosity of the order of 5×10 consisting along each chain: of units of formula R of units of formula (R and blocked at each chain end with a unit of formula (R where the radicals R 2 and R 3 have the following definitions: the radicals R the radicals R where at least 1%, in numerical terms, of the substituents R (a′) at least one reactive linear polyorganosiloxane oil having at least two OH groups per molecule and having a dynamic viscosity ranging from 5×10 (b) at least one polyorganosiloxane resin carrying condensable hydroxyl substituents and having at least two different siloxyl units selected from those of the formula (R (c) at least one crosslinking agent which is soluble in the silicone phase comprising at least two functional groups capable of reacting with the polyorganosiloxane resin (b); (d) at least one condensation catalyst capable of catalyzing the reaction of the constituent (b) with the constituent (c); (e) at least one surfactant; and (f) water, the quantities of surfactant(s) and of water being sufficient for producing an oil-in-water emulsion, the constituent (a)/constituent (a′) weight ratio being within the range from 2 to 5, and the constituents (a), (a′), (b) and (c) being mixed with each other before emulsification, said composition being in the form of an oil-in-water emulsion which does not emit hydrogen and said composition having a lower coefficient of friction and increased durability relative to a composition having an a/a′ ratio outside the claimed range.