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:
Feb. 17, 1976
Filed:
Apr. 27, 1972
John A Powell, Willingboro, NJ (US);
Alan Williams, Richboro, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
Polymers having low permeability to gases and vapors and yet high heat stability and creep resistance are prepared by a novel method of polymerizing acrylonitrile, a vinylidene aromatic monomer such as styrene and an olefinic ester such as methyl methacrylate. Conjugated diene-based impact modifiers for said polymers are disclosed, as well as impact-resistant blends of said polymers and said impact modifiers. The blends are useful for packaging materials in applications wherein high thermoformability and processability, as well as excellent barrier properties and heat stability, color stability, and creep resistance are desired.