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:
Nov. 03, 1987
Filed:
Oct. 27, 1986
Applicant:
Inventor:
Peter Lamont, Midland, MI (US);
Assignee:
Dow Corning Corporation, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 18 ; 556464 ; 556466 ; 528 32 ; 528 37 ;
Abstract
A method of reducing the reaction between polydiorganosiloxane gum and reinforcing silica, which causes 'creping', has been discovered. The method mixes crude polydiorganocyclosiloxane with a carbonate or bicarbonate salt of potassium or cesium, heats the mixture, then filters to remove the salt. The treated material can be further purified by stripping this filtered material to give a polydiorganocyclosiloxane having a hydroxyl content of less than 1 part per million of polydiorganocyclosiloxane.