Silicone resin

Details Silicone resin Silicone resin

1981-12-16

1983-06-14

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525478, 528 10, 528 12, 528 14, 528 24, C08F28300

Patent

active

043884490

ABSTRACT:
The invention relates to a novel thermoplastic monoorganopolysiloxane resin comprising units of the formula RSiO.sub.1.5 and R.sub.1 R.sub.2 R.sub.3 SiO.sub.0.5 wherein R,R.sub.1,R.sub.2 and R.sub.3 are hydrogen, or organic groups which may be the same or different, at least 85% of the R groups in the RSiO.sub.1.5 being organic groups, and at least two of the groups R.sub.1, R.sub.2 and R.sub.3 in each R.sub.1 R.sub.2 R.sub.3 SiO.sub.0.5 unit being organic groups, and in which the ratio RSiO.sub.1.5 units to R.sub.1 R.sub.2 R.sub.3 SiO.sub.0.5 units is from 1:0.005 to 1:0.03 on a molar basis. Such resins are useful as electrical insulation material and as hold out agents for heat recoverable materials.

REFERENCES:
patent: 3318844 (1967-05-01), Krantz
patent: 3489782 (1970-01-01), Pruvost et al.
patent: 3634321 (1972-01-01), Nugent
patent: 3832420 (1974-08-01), Clark
patent: 3929704 (1975-12-01), Horning
Ezrin, Polymer Molecular Weight Methods, Advances in Chemistry Series, No. 125, pp. 98-107, (1973), American Chemical Society, Washington, D.C.

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