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US 2026/0275044 A1Published application
Cobalt catalyzed hydroformylation of vinyl-functional polyorganosiloxanes
OwnerMichael Tulchinsky, Jason Fiskinventors
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Abstract
A process for preparing a propanal-functional polyorganosiloxane includes contacting carbon monoxide and hydrogen gas and a vinyl-functional polyorganosiloxane with at least 4 siloxane units per molecule in the presence of a cobalt carbonyl catalyst with heating at less than 90° C. and pressure of greater than 150 psi to 700 psi.
Claims14
A process for preparing a propanal-functional polyorganosiloxane, said process comprising:
- 1) combining starting materials comprising
- (A) a gas comprising hydrogen and carbon monoxide,
- (B) an vinyl-functional polyorganosiloxane with at least 4 siloxane units per molecule, and
- (C) a cobalt carbonyl catalyst in an amount sufficient to provide at least 142 ppm of cobalt metal, and
- (D) a solvent;
- wherein step 1) is performed
- at a temperature of 50° C. to <90° C.;
- at a pressure of >150 psi to 700 psi;
- and
- for a time of at least 30 minutes;
- thereby preparing a reaction fluid comprising the propanal-functional polyorganosiloxane.
8 more elements
Dependencies are inferred from the claim text.