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:
Aug. 05, 1997
Filed:
Jul. 11, 1996
Applicant:
Inventors:
Stephen Havriliak, Jr, Huntingdon Valley, PA (US);
Nazir Ahmed Memon, Yardley, PA (US);
Choung-Houng Lai, Hsin-Chu Hsien, TW;
Assignee:
Rohm and Haas Company, Philadelphia, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
525 98 ; 525 70 ; 525 71 ;
Abstract
Syndiotactic polystyrene can be impact-modified by a blend of (a) polystyrene-hydrogenated polybutadiene block copolymers and (b) one or more core/shell modifiers based on a lightly or non-crosslinked rubber core, and with at least one shell or intermediate shell stage which is predominantly polystyrene, to produce a material of higher impact strength than the better value of either additive singly at the same total impact modifier level.