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:
May. 19, 1992
Filed:
Aug. 14, 1991
Polyplastics Co., Ltd., Osaka, JP;
Abstract
Polyester resin molding compositions exhibiting exceptional low temperature physical properties (i.e., flexibility and toughness) and satisfactory mold-release properties include a melt-blend of a polyester base resin (preferably one which predominantly contains polybutylene terephthalate units), a polyester elastomer (preferably a copolyester having hard and soft segments), and a mold-release effective amount of a sorbitan ester (preferably an ester reaction product of a sorbitan with fatty acid having at least 12 carbon atoms). The sorbitan ester most preferably has a hydroxyl value of between 50 to 400, exclusive, so that blooming during injection molding operations (e.g., a predrying stage) is minimized (if not eliminated entirely). Molded articles formed of the compositions of this invention may be used in a variety of applications, for example, as parts for the automotive and/or electronics industries.