Silicone elastomer

Claim 1

A COMPOSITION OF MATTER STORED SUBSTANTIALLY FREE OF MOISTURE CONSISTING ESSENTIALLY OF (1) AT LEAST ONE HYDROXY-ENDBLOCKED ESSENTIALLY LINEAR DIORGANOSILOXANE POLYMER HAVING AN AVERAGE OF AT LEAST 5 SILICON ATOMS PER MOLECULE AND A VISCOSITY NOT EXCEEDING 5X10**6 CS. AT 25*C., HAVING AN ORGANIC SUBSTITUENT/SILICON RATIO OF FROM 1.95/1 TO 2.00/1, AND WHEREIN THE ORGANIC SUBSTITUENTS BONDED TO SILICON BY C-SI BONDING ARE MONOVALENT HYDROCARBON RADICALS, (2) AT LEAST ONE CROSS-LINKING AGENT SELECTED FROM THE GROUP CONSISTING OF ACYLOXY SILANES OF THE FORMULA RMSI(OOCR'')4-M WHEREIN EACH R IS A MONOVALENT ORGANIC SUBSTITUENT BONDED TO SILICON BY C-SI BONDING AND SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS, HALOGENOHYDROCARBON RADICALS AND CYANOALKYL RADICALS, M HAS A VALUE FROM 0 TO 1 INCLUSIVE, AND EACH R'' IS A MONOVALENT SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF HYDROGEN ATOMS AND HYDROCARBON RADICALS FREE OF ALIPHATIC UNSATURATION CONTAINING FROM 1 TO 18 CARBON ATOMS AN ACYLOXY SILOXANES OF THE GENERAL FORMULA (R''COO)3-7RMSIO(R2SIO)PSIRM(OOCR'')3-M WHERE R, R'' AND M ARE AS ABOVE DEFINED AND P HAS A VALUE FROM 0 TO 20,000 INCLUSIVE, AND (3) 0.1 TO 5.0 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SILOXANE POLYMER (1) OF AN ANHYDRIDE OF SATURATED ALIPHATIC CARBOXYLIC ACIDS CONTAINING FROM 3 TO 6 INCLUSIVE CARBON ATOMS PER ANHYDRIDE MOLECULE.