Room temperature vulcanizable silicone rubber composition

Claim 2

THE PROCESS FOR OBTAINING SILICONE RUBBER COMPOSITIONS

Claim 3

PROCESS FOR THE MANUFACTURE OF THERMOSETTING SYNTHETIC RESINS WITH URETHANE GROUPS, WHICH CONTAIN CARBOXYL GROUPS WHICH ARE CURED AT ROOM TEMPERATURES TO THE SOLID, ELASTIC STATE COMPRISING MIXING A. A LINER HIGH MOLECULAR WEIGHT FLUID ORGANOPOLYSILOXANE CONTAINING TERMINAL SILICON-BONED HYDROXY GROUPS AND HAVING A VISCOSITY OF 3 X 10**6 TO 2 X 10**8 CENTIPOISE AT 25*C WHERE THE ORGANO GROUPS ARE MONOVALENT HYDROCARBON RADICALS WITH 1-100% BY WEIGHT OF HIGH MOLECULAR WEIGHT DIORGANOPOLYSILOXANE OF A LOW MOLECULAR WEIGHT LINEAR FLUID DIORGANOPOLYSILOXANE CONTAINING TERMINAL SILICONBONDED HYDROXY GROUPS AND HAVING A VISCOSITY OF 100 TO 3.0 X 10**5 CENTIPOISE AT 25*C WHERE THE ORGANO GROUPS REPRESENT MONOVALENT HYDROCARBON GROUPS, B. DISPERSING INTO THE ORGANOPOLYSILOXANE MIXTURE 10-50 PERCENT BY WEIGHT OF FILLER BASED ON THE WEIGHT OF ORGANOPOLYSILOXANE MIXTURE, C. MIXING IN THE ABOVE MIXTURE AND ALKYL SILICATE SELECTED FROM THE CLASS CONSISTING OF (1) A MONOMERIC ORGANO-SILICATE CORRESPONDING TO THE GENERAL FORMULA,

Claim 4

PROCESS FOR THE MANUFACTURE OF THERMOSETTING SYNTHETIC RESINS WITH URETHANE GROUPS, WHICH CONTAIN CARBOXYL GROUPS WHICH ARE CURED AT ROOM TEMPERATURES TO THE SOLID, ELASTIC STATE COMPRISING MIXING A. A LINER HIGH MOLECULAR WEIGHT FLUID ORGANOPOLYSILOXANE CONTAINING TERMINAL SILICON-BONED HYDROXY GROUPS AND HAVING A VISCOSITY OF 3 X 10**6 TO 2 X 10**8 CENTIPOISE AT 25*C WHERE THE ORGANO GROUPS ARE MONOVALENT HYDROCARBON RADICALS WITH 1-100% BY WEIGHT OF HIGH MOLECULAR WEIGHT DIORGANOPOLYSILOXANE OF A LOW MOLECULAR WEIGHT LINEAR FLUID DIORGANOPOLYSILOXANE CONTAINING TERMINAL SILICONBONDED HYDROXY GROUPS AND HAVING A VISCOSITY OF 100 TO 3.0 X 10**5 CENTIPOISE AT 25*C WHERE THE ORGANO GROUPS REPRESENT MONOVALENT HYDROCARBON GROUPS, B. DISPERSING INTO THE ORGANOPOLYSILOXANE MIXTURE 10-50 PERCENT BY WEIGHT OF FILLER BASED ON THE WEIGHT OF ORGANOPOLYSILOXANE MIXTURE, C. MIXING IN THE ABOVE MIXTURE AND ALKYL SILICATE SELECTED FROM THE CLASS CONSISTING OF (1) A MONOMERIC ORGANO-SILICATE CORRESPONDING TO THE GENERAL FORMULA,

Claim 5

The process of claim 1 wherein the organo groups attached to said diorganopolysiloxanes are methyl groups.

Claim 6

The process of claim 2 wherein the alkyl silicate is polyethylsilicate and is present in an amount of 0.1 to 15 percent by weight of said high molecular weight and low molecular weight organopolysiloxanes.

Claim 7

The process of claim 3 wherein the metallic salt is used in the concentration of 0.1 to 5 percent by weight of the high molecular weight and low molecular weight diorganopolysiloxanes and said metallic salt is dibutyl tin dilaurate.

Claim 8

The process of claim 4 wherein the high molecular weight organopolysiloxane has a viscosity of 3 X 106 to 4.5 X 106 centipoise at 25*C.

Claim 9

The process of claim 4 wherein the blend of the low molecular weight organopolysiloxane and high molecular weight organopolysiloxane has a viscosity of 3 X 106 to 4.5 X 106 centipoise at 25*C and wherein the mixture of organopolysiloxanes with said filler has a viscosity of 15 X 106 to 25 X 106 centipoise at 25*C.