Silalactones and methods for their preparation and use
US4788313A · kind A · utility
2Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1983 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Dec 23, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/1896
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 novel 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 halide salt catalyst, such as tetrabutylammonium bromide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.