Process for preparing polysiloxane-polyoxyalkylene mixed block p

Details Process for preparing polysiloxane-polyoxyalkylene mixed block p Process for preparing polysiloxane-polyoxyalkylene mixed block p

1977-08-03

1979-01-23

Ivy, C. Warren

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252351, 521112, 521174, C08G 1814, C08K 554

Patent

active

041362390

ABSTRACT:
This invention relates to a process for preparing polysiloxane-polyoxyalkylene block copolymerizates at whose polysiloxane block are laterally bonded at least two polyoxyalkylene blocks, and which contain at least two structural units having the formula ##STR1## WHEREIN R.sup.1 is an alkylene group, R.sup.2 is a monovalent hydrocarbon group and/or a trialkylsilyloxy group, OR.sup.6 is a polyoxyalkylene block derived from an alcohol R.sup.6 OH, and p = 1 or 2, which comprises adding onto polysiloxanes with SiH groups silanes having the formula ##STR2## WHEREIN R.sup.3 is an alkenyl group and X a halogen or an alkoxy group, and reacting this intermediate product with a polyoxyalkylene monool. The invention also relates to novel compounds produced by the process.

REFERENCES:
patent: 3532732 (1970-10-01), Rossmy

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