Method for silalactone preparation and use

Details Method for silalactone preparation and use Method for silalactone preparation and use

1985-05-17

1986-08-05

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556438, 556442, C07F 708, C07F 718

Patent

active

046044787

ABSTRACT:
Carboxyalkyl-substituted organopolysiloxanes are prepared by hydrolysis of a silalactone composition having the formula ##STR1## where n has an average value greater than zero, R and Q are hydrocarbon and X is Cl or Br. Silicon-containing compounds having the formula R.sub.a Z.sub.b SiO.sub.(4-a-b)/2, where Z is a hydrolyzable radical, can be cohydrolyzed therewith. The silalactone composition is prepared by gently heating a mixture of an ester having the formula X.sub.2 R SiQCO.sub.2 R' and a catalyst, such as N,N-dimethylbenzylamine.

REFERENCES:
patent: 2589446 (1952-03-01), Sommer
patent: 2635109 (1953-04-01), Sommer
patent: 2963500 (1960-12-01), Sommer
patent: 3395677 (1968-07-01), Saam
patent: 4329483 (1982-05-01), Speier

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