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Synthèse de polysiloxanes téléchéliques, 1. Synthèse de diols et diépoxydes

✍ Scribed by Boutevin, Bernard ;Youssef, Boulos

Publisher
Wiley (John Wiley & Sons)
Year
1989
Weight
346 KB
Volume
190
Category
Article
ISSN
0025-116X

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✦ Synopsis

Telechelic poly(dimethy1siloxane)s (4, 5, 6) with acetoxy, hydroxyl or 2,3-epoxypropoxy functions as end groups were synthesized. As starting materials chloro-3-acetoxy-[or 3-(2,3epoxypropoxyl-propyldimethylsilanes (2 and 3) were prepared by hydrosilylation of the corresponding allylic derivatives with chlorodimethylsilane, and subsequently condensed with a-hydro-w-hydroxyoligo-(or poly-) dimethylsiloxanes (1 b -d) in the presence of pyridine. The hydroxyl derivatives 5 a -d were obtained by hydrolysis of the acetoxy derivatives, and the 3-(2,3-epoxypropoxy)propyl derivatives 6a, b by reaction of the diols with 1 -chloro-2,3epoxypropane.

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