Organopolysiloxane resin, production method thereof, and curable

Details Organopolysiloxane resin, production method thereof, and curable Organopolysiloxane resin, production method thereof, and curable

1997-11-05

1998-12-01

Glass, Margaret W.

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

Synthetic resins

From silicon reactant having at least one...

556459, 528 10, 528 32, 528 38, 528 40, 528 41, 528 42, 524837, C08G 7706, C08G 7716

Patent

active

058440607

ABSTRACT:
Provided are an organopolysiloxane resin having a number average molecular weight of at least 500 and a silanol group content of at least 5 weight %, and comprising units of formula R.sup.1 SiO.sub.3/2, wherein R.sup.1 is a hydrogen atom or a monovalent substituted or unsubstituted hydrocarbon group having 1 to 18 carbon atoms, in a proportion of 30 to 100 mole %, the units of formula R.sup.1 SiO.sub.3/2 including 30-80 mole % of one silanol group-containing units of formula R.sup.1 Si(OH)O.sub.2/2 ; a production method of the aforesaid organopolysiloxane resin; and a curable organopolysiloxane resin composition comprising the aforesaid organopolysiloxane resin.

REFERENCES:
patent: 2508196 (1950-05-01), Seidel et al.
patent: 2842522 (1958-07-01), Frye
patent: 3361688 (1968-01-01), Bonitz et al.
patent: 3489782 (1970-01-01), Pruvost et al.
patent: 3705205 (1972-12-01), Antonen

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