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:
Mar. 15, 1994
Filed:
Feb. 11, 1992
Applicant:
Inventors:
Ambrogio Magni, Milan, IT;
Attilio Sioli, Milan, IT;
Claudia Andena, Milan, IT;
Mario Ponzinibbi, Milan, IT;
Assignee:
Enichem Anic S.R.L., Palermo, IT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528488 ; 528499 ;
Abstract
A procedure is described for the preparation of colorless hydrocarbon resins having a higher thermal stability than similar products in the known art. The procedure involves the treatment of polymeric mixtures deriving from the (co)polymerization by means of Friedel-Crafts catalysts of hydrocarbons or mixtures of ethylenically unsaturated hydrocarbons, with an organometallic compound of Magnesium and/or Lithium, the separation of the inorganic residues and the final removal of the volatile organic products.