Abstract 1. A CURABLE ORGANOPOLYSILOXANE RESIN CONSISTINNG ESSENTIALLY OF (A) AN ORGANOPOLYSILOXANE BASE COPOLYMER CONSISTING ESSENTIALLY OF (1) 50 TO 100 PARTS BY WEIGHT OF A RANDOM ORGANOPOLYSILOXANE CONSISTING ESSENTIALLY OF 15 TO 60 MOL PERCENT RVISIO UNITS, 0 TO 85 MOL PERCENT R2SIO UNITS, AND 0 TO 50 MOL PERCENT RSIO1.5 UNITS, IN WHICH R IS METHYL OR PHENYL, VI IS VINYL; THE PHENYL TO SILICON RATIO BEING IN THE RANGE OF 0.85:1.0 TO 1.75:1.0, THE VINYL TO SILICON RATIO BEING IN THE RANGE OF 0.15:1.0 TO 0.6:1.0; AND (2) 0 TO 50 PARTS BY WEIGHT OF A BLOCK ORGANOPOLYSILOXANE CONSISTING ESSENTIALLY OF (A) POLYMER BLOCKS OF THE AVERAGE STRUCTURE (R2SIO)X(RVISIO)Y(RSIO1.5)Z IN WHICH R AND VI ARE DEFINED ABOVE, THE SUM OF X+Y+Z HAS AN AVERAGE VALUE OF FROM 5 TO 180 INCLUSIVE, AT LEAST 30 PERCENT OF BLOCK (A) BEING (CH3)2SIO UNITS, Y HAS A VALUE UP TO 30 MOL PERCENT OF (A), Z HAS A VALUE UP TO 10 MOL PERCENT OF (A), AND (B) POLYMER BLOCKS OF THE AVERAGE UNIT FORMULA (H5C6)M-SI(-CH3)N-O(4-M-N/2) IN WHICH M HAS AN AVERAGE VALUE FORM 1 TO 1.1 INCLUSIVE, N HAS AN AVERAGE VALUE FROM 1 TO 0.1 INCLUSIVE, THE SILOXANE UNITS IN (A) BEING FROM 10 TO 75 MOL PERCENT OF BLOCK COPOLYMER (2), POLYSILOXANES (1) AND (2) HAVING BEEN SEPARATELY RENDERED ESSENTIALLY FREE OF HYDROXYL GROUPS; AND (B) A HYDROGEN-FUNCTIONAL ORGANOPOLYSILOXANE OF THE FORMULA (C6H5-)A-SI(-O-SI(-R)(-CH3)-H)(4-A) IN WHICH R IS DEFINED ABOVE, A IS 0 TO 3 INCLUSIVE, AT LEAST ONE SILICON ATOM IN (B) BEING ATTACHED TO A PHENYL GROUP, POLYSILOXANE (B) BEING PRESENT IN SUCH AN AMOUNT THAT THE RATIO OF HYDROGEN ATOMS IN (B) TO VINYL GROUPS IN (A) IS IN THE RANGE OF 0.8:10 TO 1.5:1.0, AND (C) AT LEAST 0.1 PART BY WEIGHT PLATINUM PER MILLION PARTS BY WEIGHT OF THE COMBINED TOTAL WEIGHT OF SILOXANES (A) AND (B).
A CURABLE ORGANOPOLYSILOXANE RESIN CONSISTINNG ESSENTIALLY OF (A) AN ORGANOPOLYSILOXANE BASE COPOLYMER CONSISTING ESSENTIALLY OF (1) 50 TO 100 PARTS BY WEIGHT OF A RANDOM ORGANOPOLYSILOXANE CONSISTING ESSENTIALLY OF 15 TO 60 MOL PERCENT RVISIO UNITS, 0 TO 85 MOL PERCENT R2SIO UNITS, AND 0 TO 50 MOL PERCENT RSIO1.5 UNITS, IN WHICH R IS METHYL OR PHENYL, VI IS VINYL; THE PHENYL TO SILICON RATIO BEING IN THE RANGE OF 0.85:1.0 TO 1.75:1.0, THE VINYL TO SILICON RATIO BEING IN THE RANGE OF 0.15:1.0 TO 0.6:1.0; AND (2) 0 TO 50 PARTS BY WEIGHT OF A BLOCK ORGANOPOLYSILOXANE CONSISTING ESSENTIALLY OF (A) POLYMER BLOCKS OF THE AVERAGE STRUCTURE (R2SIO)X(RVISIO)Y(RSIO1.5)Z IN WHICH R AND VI ARE DEFINED ABOVE, THE SUM OF X+Y+Z HAS AN AVERAGE VALUE OF FROM 5 TO 180 INCLUSIVE, AT LEAST 30 PERCENT OF BLOCK (A) BEING (CH3)2SIO UNITS, Y HAS A VALUE UP TO 30 MOL PERCENT OF (A), Z HAS A VALUE UP TO 10 MOL PERCENT OF (A), AND (B) POLYMER BLOCKS OF THE AVERAGE UNIT FORMULA
Claim 2
Dependent Claim
173 words
A CURABLE ORGANOPOLYSILOXANE RESIN CONSISTINNG ESSENTIALLY OF (A) AN ORGANOPOLYSILOXANE BASE COPOLYMER CONSISTING ESSENTIALLY OF (1) 50 TO 100 PARTS BY WEIGHT OF A RANDOM ORGANOPOLYSILOXANE CONSISTING ESSENTIALLY OF 15 TO 60 MOL PERCENT RVISIO UNITS, 0 TO 85 MOL PERCENT R2SIO UNITS, AND 0 TO 50 MOL PERCENT RSIO1.5 UNITS, IN WHICH R IS METHYL OR PHENYL, VI IS VINYL; THE PHENYL TO SILICON RATIO BEING IN THE RANGE OF 0.85:1.0 TO 1.75:1.0, THE VINYL TO SILICON RATIO BEING IN THE RANGE OF 0.15:1.0 TO 0.6:1.0; AND (2) 0 TO 50 PARTS BY WEIGHT OF A BLOCK ORGANOPOLYSILOXANE CONSISTING ESSENTIALLY OF (A) POLYMER BLOCKS OF THE AVERAGE STRUCTURE (R2SIO)X(RVISIO)Y(RSIO1.5)Z IN WHICH R AND VI ARE DEFINED ABOVE, THE SUM OF X+Y+Z HAS AN AVERAGE VALUE OF FROM 5 TO 180 INCLUSIVE, AT LEAST 30 PERCENT OF BLOCK (A) BEING (CH3)2SIO UNITS, Y HAS A VALUE UP TO 30 MOL PERCENT OF (A), Z HAS A VALUE UP TO 10 MOL PERCENT OF (A), AND (B) POLYMER BLOCKS OF THE AVERAGE UNIT FORMULA