Back to results
US 6,143,912 AGranted
Process for preparing methylhydrogenpolysiloxanes having trimethylsilyl end groups
AssigneeWacker Chemie AG
InventorsTassilo Lindner, Gilbert Geisberger, Bernd Pachaly
Life of this patent
Estimating the term…
Abstract
A process for preparing methylhydrogenpolysiloxanes having trimethylsilyl end groups wherein, in a first step, methyldichlorosilane and trimethylchlorosilane are reacted with at most 0.5 mol of water per mole of hydrolyzable chlorine to give a partial hydrolysate and gaseous hydrogen chloride and, in a second step, the partial hydrolysate, to remove the SiCl groups still present, is treated with water, forming hydrochloric acid.
Claims11
A process for preparing methylhydrogenpolysiloxanes having trimethylsilyl end groups, said process comprising:
- in a first step, reacting methyldichlorosilane and trimethylchlorosilane with at most 0.5 mol of water per mole of hydrolyzable chlorine to give a partial hydrolysate and gaseous hydrogen chloride, and
- in a second step, treating the partial hydrolysate with water to remove the SiCl groups still present, forming hydrochloric acid.
Dependencies are inferred from the claim text.