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:
Apr. 25, 1995
Filed:
May. 03, 1993
Applicant:
Inventors:
Catia Bastioli, Novara, IT;
Vittorio Bellotti, Novara, IT;
Gianfranco Del Tredici, Sesto Calende, IT;
Assignee:
Butterfly S.r.l., Ravenna, IT;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ; C08K / ; C08K / ;
U.S. Cl.
CPC ...
524 53 ; 524 52 ; 524312 ; 524377 ; 524387 ;
Abstract
Biodegradable compositions comprising destructured starch and an ethylene-vinyl acetate copolymer are prepared by mixing the starch and the copolymer in an extruder heated to a temperature of between 80.degree. and 180.degree. C. and bringing the water content to below 6% and any ammonia content to below 0.2% by weight. The composition fed to the extruder may optionally include up to 40% by weight of an ethylene-vinyl alcohol polymer, as well as a starch destructuring agent and a high boiling plasticizer.