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:
Sep. 16, 2003
Filed:
Feb. 20, 2002
Applicant:
Inventors:
Denis Bertin, Morreville, FR;
Patrice Robert, Serquigny, FR;
Assignee:
Atofina, Puteaux, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F 8/50 ; C08F 1/006 ; C08F / ;
U.S. Cl.
CPC ...
C08F 8/50 ; C08F 1/006 ; C08F / ;
Abstract
This process for the production of a controlled-rheology resin of a propylene homopolymer or copolymer or a composition that comprises a propylene homopolymer or copolymer in the absence of a functional monomer, whereby said process brings about an increase of the fluidity index of the resin by cuts of the chains, is characterized by the fact that at least one stable free radical is incorporated into said resin in the viscous state, since a solid product that has an increased fluidity index is formed. In particular, the stable free radical or radicals is or are selected from among nitroxyl radicals, comprising at least one ═N—O′ group.