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:
Jul. 22, 2014
Filed:
Jun. 17, 2010
Taro Kiguchi, Osaka, JP;
Taro Kiguchi, Osaka, JP;
Kaneka Corporation, Osaka, JP;
Abstract
The present invention provides pre-expanded polypropylene resin beads comprising (A) a glycerin monoester of a Cto Cfatty acid and/or a polyglycerin monoester of a Cto Cfatty acid and (B) a glycerin diester of a Cto Cfatty acid(s) and/or a polyglycerin diester of a Cto Cfatty acid(s), in such a manner that a weight ratio [=(A)/(B)] between (A) and (B) in the polypropylene resin particles is 1.3 or more but 10 or less, and a total content [=(A)+(B)] is 0.3 parts by weight or more but 5 parts by weight or less with respect to 100 parts by weight of the polypropylene resin. The resin particles can be excellently used in in-mold foaming, without requiring washing with a chemical like nitric acid or metaphosphate soda, and can provide a polypropylene resin in-mold foamed product with good antistatic properties.