The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 1986
Filed:
Jan. 29, 1985
Michael J Green, Hull, GB;
Gerhard A Kleiner, London, GB;
BP Chemicals Limited, London, GB;
Abstract
A process for the transetherification of silyl ethers comprises reacting the silyl ether with a hydroxyl containing compound in the presence of a Lewis base containing catalyst. Preferably, the Lewis base containing catalyst is (1) an amidine, (2) a Lewis base in the presence of an epoxide or (3) a trivalent organophosphorus compound in the presence of an activated alkene or alkyne. The Lewis base containing catalyst can either be used in a homogeneous form, soluble in the reactants, or in a heterogeneous form, insoluble in the reactants, having the Lewis base containing catalyst supported on an inert solid. An application of the catalysts is in the production of polydimethylsiloxane polyether block copolymers by reaction of a polydimethylsiloxane silyl ether with a polyether monol.