Organosiloxane resin compositions and glass laminates impregnated therewith

Claim 1

A COMPOSITION OF MATTER COMPRISING A MIXTURE OF FROM 5 TO 95% BY WEIGHT OF (1) A SILOXANE COMPOSED ESSENTIALLY OF FROM 4.5 TO 17 MOL PERCENT DIPHENYLSILOXANE UNITS, FROM 22 TO 55 MOL PERCENT MONOMETHYLSILOXANE UNITS, FROM 25 TO 65 MOL PERCENT MONONETHYLSILOXANE UNITS AND UP TO 38 MOL PERCENT PHENYLMETHYLSILOXANE UNITS AND FROM 5 TO 95% BY WEIGHT OF (2) A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF (A) A SILICON COMPOUND, COMPATIBLE WITH (1), HAVING A VISCOSITY OF AT LEAST 500 CS. AT 25*C. AND HAVING PER SILICON ATOM AN AVERAGE OF AT LEAST 1.5 HYDROCARBON RADICALS SELECTED FROM THE GROUP CONSISTING OF THE PHENYL, VINYL AND METHYL RADICALS SUCH THAT THE PHENYL TO SILICON RATIO IS AT LEAST 0.7:1, VINYL TO SILICON RATIO RANGES FROM 0.3:1 TO 1:1 AND EACH VINYL GROUP IS ATTACHED TO A SILOXY-SILICON ATOM, THE SILICON ATOMS OF (A) BEING JOINED BY SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF OXYGEN ATOMS, PHENYLENE RADICALS AND ALKYLENE READICALS OF LESS THAN FOUR CARBON ATOMS, AND (B) A SILICON COMPOUND, COMPATIBLE WITH (1) AND (A), HAVING A VISCOSITY OF LESS THAN 500 CS. AT 25*C. AND HAVING AT LEAST TWO SILOXY-SILICONBONDED VINYL GROUPS PER MOLECULE, THE RAMINING SILICON VALENCES OF (B) BEING SATISFIED WITH SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF OXYGEN ATOMS, PHENYL RADICALS, METHYL RADICALS, PHENYLENE RADICALS AND ALKYLENE RADICALS OF LESS THAN FOUR CARBON ATOMS, SAID COMPOUND (B) BEING PRESENT IN AN AMOUNT NO GREATER THAN 50% BY WEIGHT OF THE CUMULATIVE WEIGHT OF COMPONENTS ( ) AND (2).