Fusible elastomers from mixtures of polysiloxanes containing methyl, vinyl and hydrogen groups with boron modified siloxanes and peroxides

Claim 1

A COMPOSITION COMPRISING (A) 100 PARTS BY WEIGHT OF A METHYLVINYLPOLYSILOXANE HAVING FROM 1.98 TO 2.01 ORGANO GROUPS PER SILICON ATOM, AND HAVING AN AVERAGE MOLECULAR WEIGHT NOT LESS THAN 2X10**5, (B) A LINEAR METHYLHYDROGENPOLYSILOXANE HAVING NOT LESS THAN 0.50 SILICONBONDED HYDROGEN ATOMS PER SILICON-ATOM AND OF AVERAGE MOLECULAR WEIGHT NOT GREATER THAN 20,000 IN AN AMOUNT OF UP TO 20 PARTS BY WEIGHT, (C) FROM 5 TO 60 PARTS BY WEIGHT OF THE PRODUCT OBTAINED BY REACTING DIMETHYLPOLYSILOXANE AND A BORON COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND BORIC OXIDE AT ABOUT 100 TO 250*C., (D) 15 TO 100 PARTS BY WEIGHT OF A FILLER SETTLED FROM THE GROUP CONSISTING OF REINFORCING FILLERS AND SEMIREINFORCING FILLERS AND (E) 0.5 TO 10 PARTS BY WEIGHT OF A PEROXIDE CURING AGENT.