Pasty organopolysiloxane compositions thermosetting into elastom

Details Pasty organopolysiloxane compositions thermosetting into elastom Pasty organopolysiloxane compositions thermosetting into elastom

1982-01-07

1983-05-17

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

523220, 524588, 524847, 524730, C08K 334

Patent

active

043840680

ABSTRACT:
Pasty organopolysiloxane compositions having a penetration of from 80 to 400 and which can be thermoset into elastomers having good mechanical properties, are comprised of an intimate admixture of (i) 100 parts by weight of a diorganopolysiloxane oil having a viscosity of from 500 to 300,000 mPa.multidot.s at 25.degree. C., (ii) 7 to 85 parts by weight of reinforcing silicas having a specific surface area of at least 50 m.sup.2 /g, said reinforcing silicas comprising from 55 to 95% precipitated silica and 5 to 45% pyrogenic silica, (iii) 1 to 20 parts by weight of a structuring inhibitor, and (iv) 0.1 to 4 parts by weight of an organic peroxide cross-linking agent.

REFERENCES:
patent: 3865778 (1975-02-01), Christie
patent: 4033924 (1977-01-01), Mine et al.
patent: 4230820 (1980-10-01), Maschberger

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