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. 19, 1993
Filed:
Jul. 10, 1992
Applicant:
Inventors:
Mark A Buese, Upper Darby, PA (US);
Sejal Patel, Philadelphia, PA (US);
Assignee:
Temple University of the Commonwealth System of Higher Education, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 14 ; 528 19 ; 528 31 ; 556459 ; 556462 ; 556467 ;
Abstract
The molecular weight distribution of polydimethylsiloxane-.alpha., .omega.-diol fluids is reduced by contacting the fluid with an alkaline earth metal hydride or hydroxide. Molecular weight distributions lower than Poisson distributions may be obtained. The resulting monodispersed polydimethylsiloxane.alpha., .omega.-diol fluids may be substituted by reaction with common silanating reagents to prepare telechelic polydimethylsiloxanes which are nearly monodispersed.