| abstract |
This invention describes a polycyclosiloxane of the formulan where R a , R b and R c are independently monovalent radicals; x is an integer equal to or greater than 3, y is equal to or greater than 0 and x plus y is greater than 3. A process for the production of the polycyclosiloxane above consisting essentially of (A) adding a solvent solution of 1,1-dichlorosilacyclobutane and, optionally, dichlorodiÂorganosilane, to a mixture of water and solvent with rapid stirring at room temperature at a rate which does not cause the mixture to raise in temperature, (B) washing with water, (C) drying with MgSOâ‚„, (D) filtering and (E) removing the solvent. Methods of using the polycyclosiloxane of silacyclobutane as an ingredient in a silicone composition which cures on exposure to moisture to give an elastomer is claimed, as is the composition produced. |