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, 1989
Filed:
Mar. 09, 1988
Applicant:
Inventor:
Harmen Z Coster, Amsterdam, NL;
Assignee:
Borg-Warner Chemicals, Inc., Parkersburg, WV (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
525 86 ; 525 87 ; 525234 ;
Abstract
Moulded articles of uniform wall thickness are prepared by vacuum-forming or thermoforming a composition comprising a uniform blend of, as base resin, a moulding grade resin having a continuous phase of a first copolymer of a styrenic monomer and an ethylenically unsaturated nitrile and a minor proportion of, as additive resin, a second copolymer of a styrenic monomer and an ethylenically unsaturated nitrile having an ultra high molecular weight, the forming operation being carried out at least 50.degree. C. above the glass transition temperature of the base resin and at a stress level of at most 1 MPa.