Poly(silethynylenedisiloxane) and method for the manufacture the

Details Poly(silethynylenedisiloxane) and method for the manufacture the Poly(silethynylenedisiloxane) and method for the manufacture the

1993-01-25

1994-02-22

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 35, 528 14, 528 15, 528 17, 528 18, 528 21, C08G 7704

Patent

active

052888320

ABSTRACT:
Silethynylenedisiloxane polymers are described with repeating units represented by --R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 OSiR.sup.5 R.sup.6 O-- where R.sup.1 -R.sup.6 independently represent hydrogen atoms, alkyl groups, aryl groups, or alkenyl groups. The polymers are prepared by reacting a disilylacetylene compound represented by the formula X.sup.1 R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 X.sup.1 and a silane compound represented by the formula X.sup.2.sub.2 SiR.sup.5 R.sup.6 where X.sup.1 and X.sup.2 represent H, OH, OM, or a hydrolyzable group. X.sup.1 and X.sup.2 are not identical and are selected so that they undergo a condensation reaction to form a siloxane bond.

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patent: 3699140 (1972-10-01), Chandra et al.
patent: 5102968 (1992-04-01), Bortolin et al.

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