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. 17, 1987
Filed:
May. 06, 1986
Applicant:
Inventors:
Raymond J Ehrig, Pittsburgh, PA (US);
Richard C Weil, Monroeville Borough, PA (US);
Assignee:
Aristech Chemical Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525387 ; 5253338 ;
Abstract
Small amounts of peroxides which do not decompose to TBA and which have a half-life in the range of about 1.0 to 10 hrs. at 128.degree. C. are incorporated in polypropylene by thermal mechanical melting in an extruder. Control of molecular weight and molecular weight distribution is achieved as a function of the amount of peroxide added. The peroxides of choice are 2,2 di(t-amyl) peroxy propane and 3,6,6,9,9 pentamethyl-3 n-propyl-1,2,4,5 tetraoxacyclononane.