| abstract |
1. A ROOM TEMPERATURE VULCANIZABLE SILICONE RUBBER COMPOSITION SUITABLE FOR MOLDING APPLICATIONS WITH DEEP SECTION CURE AND KNOTTY TEAR COMPRISING: (A) A BASE LINEAR FLUID ORGANOPOLYSILOXANE CONTAINING TERMINAL SILICON-BONDED HYDROXY GROUPS AND HAVING A VISCOSITY OF 1000 TO 10,000,000 CENTIPOISE WHEN ,EASURED AT 25* C., THE ORGANIC GROUPS OD SAID ORGANOPOLYSILOXANE BEING SELECTED FROM THE CLASS CONSISTING OF (I) A MONOMERIC ORGANO SILICATE CORREGENATED MONOVALENT HYDROCARBON RADICALS, AND CYANOALKYL RADICALS, (B) FROM 1 TO 15% BY WEIGHT OF A SILICATE BASED ON THE LINEAR ORGANOPOLYSILOXANE SELECTED FROM THE CLASS CONTAINING OF (I) A MONOMERIC ORGANO SILICATE CORRESPONDING TO THE GENERAL FORMULA, (R5O)3SIR6 WHERE R5 IS SELECTED FROM MONOVALENT HYDROCARBON RADICALS AND HALOGENATED MONOVALENT HYDROCARBON RADICALS AND Y IS SELECTED FROM HYDROGEN AND R5 RADICALS. >N-Y WHEREIN THE ABOVE ADDITIVES ARE SIMULTANEOUSLY CONTACTED WITH SAID FILLER AT A TEMPERATURE IN THE RANGE OF 100 TO 180* C. AND (II) REMOVING RESIDUAL AMOUNTS OF SAID ADDITIVES FROM THE FILLER, WHEN R1 IS SELECTED FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBON RADICALS, R2, R3 AND R4 ARE ALL SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, ,ONOVALENT HYDROCARBON RADICALS AND HALOGENATED, MONOVALENT HYDROCARBON RADICALS, N VARIES FROM 3 TO 4, A IS A WHOLE NUMBER THAT VARIES FROM 1 TO 2, X IS SELECTED FROM THE CLASS CONSISTING OF -NR2Y, -ONR2**5, AND (R2**4SI)AX WHEREIN THE ABOVE ADDITIVES ARE SIMULTANEOUSLY CON(3) FROM 1 TO 20 PARTS OF A SILYL NITROGEN COMPOUND OF THE FORMULA, (R2**3SIO)N (2) FROM 2 TO 25 PARTS OF A CYCLIC SILOXANE OF THE FORMULA, R1-N(-R2)-OH WHERE R5 IS A RADICAL SELECTED FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBON RADICALS AND CYANOALKYL MONOVALENT HYDROCARBON RADICALS AND CYANOALKYL RADICALS, R6 IS SELECTED FROM THE CLASS CONSISTING OF ALKYL, HALOALKYL, ARYL HALOARYL, ALKENYL CYCLOALKYL, CYCLOALKENYL CYANOALKYL, ALKOXY AND ARYLOXY RADICALS AND (II) A LIQUID PARTIAL HYDROLYSIS PRODUCT OF THE AFOREMENTIONED ORGANOSILICATE, (C) FROM 0.1 TO 5% BY WEIGHT BASED ON THE LINEAR ORGANOPOLYSILOXANE OF A CATALYST WHICH IS A METALLIC SALT OF AN ORGANIC MONOCARBOXYLIC OR DICARBOXYLIC ACID IN WHICH THE METAL ION IS SELECTED FROM THE CLASS CONSISTING OF LEAD, TIN, ZIRCONIUM, ANTIMONY, IRON, CADMIUM, BARIUM, CALCIUM, TITANIUM, BISMUTH AND MANGANESE, AND (D) FROM 5% TO 300% BY WEIGHT BASED ON THE LINEAR ORGANOPOLYSILOXANE OF A TREATED SILICA FILLER PRODUCT PREPARED BY INTIMATELY CONTACTING PER 100 PARTS OF SAID SILICA FILLER HAVING A SURFACE AREA OF AT LEAST 20 SQUAR METERS PER GRAM AND CONTAINING FROM 0.2 TO 2.0% BY WEIGHT OF MOIETIES SELECTED FROM THE CLASS CONSISTING OF HYDROXYL GROUPS, WATER AND MIXTURES THEREOF WITH (1) FROM 1/2 PART TO 5 PARTS OF A HYDROXYL AMINE HAVING THE FORMULA, |