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:
Feb. 16, 1988
Filed:
Jun. 16, 1986
Applicant:
Inventor:
Jurgen Burkhardt, Winhoring, DE;
Assignee:
Wacker-Chemie GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
524789 ; 524493 ; 524864 ; 524869 ; 528 21 ; 528 22 ; 528 23 ; 528 33 ; 556467 ;
Abstract
Linear triorganosiloxy-terminated organopolysiloxanes are prepared by the condensation of linear organopolysiloxanes having one Si-bonded hydroxyl group in each teminal unit in the presence of phosphonitrilic chloride, and after the organopolysiloxane has reached the desired average viscosity and while still containing the phosphonitrilic chloride, the organopolysiloxane is reacted with from 0.05 to 1 weight percent of hexaorganodisilazane, based on the weight of the starting organopolysiloxane, with the proviso that a filler having a BET surface area of at least 50 m.sup.2 /g does not exceed 1 weight percent, based on the weight of the starting organopolysiloxane.