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. 22, 1982
Filed:
Mar. 26, 1981
Frank E Lordi, West Chester, PA (US);
Jacob Triplett, West Chester, PA (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
A molding composition having advantageous toughness and impact resistance is prepared by polymerizing a mixture of styrene and maleic anhydride in the presence of and adapted to incorporate from about 5 to about 25% of a high impact polystyrene containing from about 4 to about 16% rubber, said high impact polystyrene having an average molecular weight which is significantly higher than the average molecular weight of the completed molding composition. The composition is especially useful in molding fiber-reinforced articles. The composition has outstanding toughness when green. That is, hot and freshly molded articles can be removed from the mold with minimized breakage, thus decreasing the amount of scrap arising from the breakage of a green molded item at the time of being ejected and/or removed from a mold. Moreover, the composition is moldable throughout a wide range of conditions and is less sensitive to changes in molding conditions.