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:
Jun. 15, 1976
Filed:
Nov. 06, 1972
King Lau Howe, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A composition consisting essentially of (A) 65 to 99 percent by weight of a polymer consisting essentially of 76 to 85 percent by weight acrylonitrile polymerized units and 24 to 15 percent by weight polymerized units of at least one aromatic olefin containing 8 to 14 carbon atoms, said polymer having a melt viscosity of 10.sup.4 to 10.sup.6 poises at 220.degree.C. and an inherent viscosity of from 0.3 to 1.0 deciliter per gram and (B) 1 to 35 percent by weight of grafted rubber, said grafted rubber consisting essentially of 30 to 50 percent by weight of a graft polymer consisting essentially of 61 to 85 percent by weight acrylonitrile polymerized units and 39 to 15 percent by weight polymerized units of at least one aromatic olefin containing 8 to 14 carbon atoms, and 50 to 70 percent by weight rubber; said composition having a carbon dioxide permeability of less than 0.045 barrer; and shaped articles made therefrom.