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. 25, 1977
Filed:
Apr. 11, 1975
Sergio Arrighetti, San Donato Milanese, IT;
Sebastiano Cesca, San Donato Milanese, IT;
Giuseppe Ghetti, San Donato Milanese, IT;
Eugenio Vajna, San Donato Milanese, IT;
Snam Progetti S.p.A., San Donato Milanese, Milan, IT;
Abstract
A method is described whereby olefin terpolymers, consisting of ethylene, an alpha olefin and a polyene having in the molecule, in addition to the double bond participating in the formation of the macromolecule, at least one conjugated double bond system, are stabilized against oxidative aging without destroying their characteristic high vulcanization rate by reacting them with a dienophilic agent represented by one of the following formulae: ##STR1## wherein R and R.sub.6 may be an alkyl, alkenyl, cycloalkyl, aryl or aralkyl radical having up to 8 carbon atoms, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be hydrogen or alkyl, aryl, cycloalkyl or aralkyl radicals having up to 8 carbon atoms, the R.sub.1 -R.sub.2 and R -R pairs may be divalent radicals forming condensed rings.