Abstract A process for packaging and mixing the first portion and second portion of a two-part room temperature vulcanizable silicone rubber composition comprising placing said first portion in a first plastic bag and sealing the bag, placing said second portion and said sealed first plastic bag in a second plastic bag and sealing said second bag, kneading said first plastic bag so as to break it and mixing in said second plastic bag the first portion and the second portion of said room temperature vulcanizable silicone rubber composition, said second portion of the room temperature vulcanizable silicone rubber composition comprising (a) a linear organopolysiloxane containing terminal silicon-bonded hydroxy groups and having a viscosity of 3 X 106 to 2 X 108 centipoise at 25*C., (b) 1-100% by weight of said linear organopolysiloxane of an organopolysiloxane having terminal silicon-bonded hydroxyl groups and having a viscosity of 100 to 3.0 X 105 centipoise at 25*C., and (c) a filler, and said first portion of the room temperature vulcanizable silicone rubber composition comprising (d) an alkyl silicate and (e) a metallic salt of an organic monocarboxylic or dicarboxylic acid.
A PROCESS FOR PACKAGING AND MIXING THE FIRST PORTION AND THE SECOND PORTION OF A TWO-PART TEMPERATURE VULCANIZABLE SILICONE RUBBER COMPOSITION COMPRISING PLACING SAID FIRST PORTION IN A FIRST PLASTIC BAS AND SEALING THE BAG, PLACING SAID SECOND PORTION AND SAID SEALED FRIST PLASTIC BAS IN A SECOND PLASTIC BAG AND SEALING SAID SECOND PLASTIC BAG, KNEADING SAID FIRST PLASTIC BAG SO AS TO BREAK IT AND MIXING IN SAID SECOND PLASTIC BAG THE FIRST PORTION AND THE SECOND PORTION OF SAID ROOM TEMPERATURE VULCANIZABLE SILICONE RUBBER COMPOSITION, WHEREIN SAID SECOND PORTION OF SAID ROOM TEMPERATURE VULCANIZABLE SILICON RUBBER COMPOSITION COMPRISES (A) A LINEAR, HIGH MOLECULAR WEIGHT FLUID ORGANOPOLYSILOXANE CONTAINING TERMINAL SILICON-BONDED HYDROXY GROUPS AND HAVING A VISCOSITY OF 3 X10**-6 2X10**-8 CENTIPOISE WHEN MEASURED AT 25*C, THE ORGANIC GROUPS OF THE AFORESAID ORGANOPOLYSILOXANE REPRESENTING MONOVALENT HYDROCARBON RADICALS; (B) 1-100% BY WEIGHT OF SAID HIGH MOLECULAR WEIGHT ORGANOPOLYSILOXANE OF A LOW MOLECULAR WEIHT FLUID ORGANOPOLYSILOXANE CONTAINING TERMINAL SILICON BONED HYDROXY GROUPS AND HAVING VISCOSITY WITHIN THE RANGE OF 100 TO 3.0X10**-5 CENTRIPOSIE AT 25*C, WHEREIN THE ORGANIC GROUPS OF THE LOW MOLECULAR WEIGHT ORGANOPOLYSILOXANE REPRESENT MONOVALENT HYDROCARBON RADICALS SUCH THAT THE BLEND OF THE HIGH MOLECULAR WEIGHT ORGANOPOLYSILOXLOW MOLECULAR WEIGHT ORGANOPOLYSILOXANE HAS A VISCOSITY IN THE RANGE OF 3X10**-6 TO 25X10**-6 CENTIPOISE AT 25*C; AND (C) A FILLER, AND SAID FIRST PORTION OF SAID ROOM TEMPERATURE VULCANIZABLE SILICONE RUBBER COMPOSITION COMPRISES (D) AND ALKYL SILICATE SELECTED FROM THE CLASS CONSISTING OF (1) A MONOMERIC ORGANOSILICATE CORRSPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
250 words
A PROCESS FOR PACKAGING AND MIXING THE FIRST PORTION AND THE SECOND PORTION OF A TWO-PART TEMPERATURE VULCANIZABLE SILICONE RUBBER COMPOSITION COMPRISING PLACING SAID FIRST PORTION IN A FIRST PLASTIC BAS AND SEALING THE BAG, PLACING SAID SECOND PORTION AND SAID SEALED FRIST PLASTIC BAS IN A SECOND PLASTIC BAG AND SEALING SAID SECOND PLASTIC BAG, KNEADING SAID FIRST PLASTIC BAG SO AS TO BREAK IT AND MIXING IN SAID SECOND PLASTIC BAG THE FIRST PORTION AND THE SECOND PORTION OF SAID ROOM TEMPERATURE VULCANIZABLE SILICONE RUBBER COMPOSITION, WHEREIN SAID SECOND PORTION OF SAID ROOM TEMPERATURE VULCANIZABLE SILICON RUBBER COMPOSITION COMPRISES (A) A LINEAR, HIGH MOLECULAR WEIGHT FLUID ORGANOPOLYSILOXANE CONTAINING TERMINAL SILICON-BONDED HYDROXY GROUPS AND HAVING A VISCOSITY OF 3 X10**-6 2X10**-8 CENTIPOISE WHEN MEASURED AT 25*C, THE ORGANIC GROUPS OF THE AFORESAID ORGANOPOLYSILOXANE REPRESENTING MONOVALENT HYDROCARBON RADICALS; (B) 1-100% BY WEIGHT OF SAID HIGH MOLECULAR WEIGHT ORGANOPOLYSILOXANE OF A LOW MOLECULAR WEIHT FLUID ORGANOPOLYSILOXANE CONTAINING TERMINAL SILICON BONED HYDROXY GROUPS AND HAVING VISCOSITY WITHIN THE RANGE OF 100 TO 3.0X10**-5 CENTRIPOSIE AT 25*C, WHEREIN THE ORGANIC GROUPS OF THE LOW MOLECULAR WEIGHT ORGANOPOLYSILOXANE REPRESENT MONOVALENT HYDROCARBON RADICALS SUCH THAT THE BLEND OF THE HIGH MOLECULAR WEIGHT ORGANOPOLYSILOXLOW MOLECULAR WEIGHT ORGANOPOLYSILOXANE HAS A VISCOSITY IN THE RANGE OF 3X10**-6 TO 25X10**-6 CENTIPOISE AT 25*C; AND (C) A FILLER, AND SAID FIRST PORTION OF SAID ROOM TEMPERATURE VULCANIZABLE SILICONE RUBBER COMPOSITION COMPRISES (D) AND ALKYL SILICATE SELECTED FROM THE CLASS CONSISTING OF (1) A MONOMERIC ORGANOSILICATE CORRSPONDING TO THE GENERAL FORMULA