Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1990-01-19
1991-09-17
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 32, 528 33, 528 34, 528901, 528 38, C08G 7706
Patent
active
050496352
ABSTRACT:
A room temperature-curable organopolysiloxane composition is proposed which is capable of giving a cured silicone rubber having a low elastic modulus and low hardness. The composition comprises, in addition to a silanol-terminated diorganopolysiloxane as the base component (a), (b) an organosilicon compound represented by the general formula R.sup.1 R.sup.2 Si(--OCMe.dbd.CHCOOR.sup.3).sub.2, in which Me is a methyl group, R.sup.1 is a methyl, vinyl, 3,3,3-trifluoropropyl or phenyl group, R.sup.2 is a group selected from the class consisting of methyl, vinyl, trimethyl siloxy, vinyl dimethyl siloxy, divinyl methyl siloxy, trivinyl siloxy and 3,3,3-trifluoropropyl dimethyl siloxy groups and R.sup.3 is a methyl or ethyl group, (c) an organosilane or organosiloxane compound having, in a molecule, at least three groups selected from the class consisting of alkoxy groups, iminoxy groups and alkenyloxy groups bonded to the silicon atom or atoms, and (d) an organosiliane or organosiloxane compound having, in a molecule, at least one guanidino group represented by the general formula (R.sup.4.sub.2 N).sub.2 C.dbd.N--, in which R.sup.4 is a hydrogen atom or a monovalent hydrocarbon group.
REFERENCES:
patent: 4720531 (1988-01-01), Chung et al.
patent: 4734479 (1988-03-01), Inoue et al.
patent: 4788254 (1988-11-01), Kawakubo et al.
Marquis Melvyn I.
Shin-Etsu Chemical Co. , Ltd.
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