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:
May. 10, 1994
Filed:
Mar. 01, 1993
Applicant:
Inventors:
Wilhelm Weber, Leverkusen, DE;
Karl-Heinz Sockel, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 14 ; 528 23 ; 528 34 ; 556467 ; 556469 ;
Abstract
In the production of a triorganylsily or organodiorganylsilyl end-terminated poly-(diorganosiloxane) by reacting an .alpha.,.omega.-dihydroxypoly(diorganosiloxane) with a tetraorganyloxysilane or organotriorganyloxysilane in the presence of at least one alkali hydroxide, alkali alkoxide or alkali silanolate as a catalyst, the improvement which comprises effecting the reaction also in the presence of additionally at least one alkali metal salt which is soluble in the reactive system.