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. 31, 2021
Filed:
Jun. 02, 2016
Nippon Shokubai Co., Ltd., Osaka, JP;
Hiroko Okochi, Hyogo, JP;
Tomonari Takata, Hyogo, JP;
Kazuaki Matsumoto, Osaka, JP;
Yasutaka Nakatani, Hyogo, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
The purpose of the present invention is to provide an organic polymer fine particle which can be hardly fallen off from a film when used as an anti-blocking agent for a film. The organic polymer fine particle according to the present invention is characterized in comprising a (meth)acrylate polymer crosslinked by a bifunctional crosslinkable monomer and a hindered phenol antioxidant or a component derived therefrom, wherein a ratio of a structure unit composed of the bifunctional crosslinkable monomer in the (meth)acrylate polymer crosslinked by the bifunctional crosslinkable monomer is 5 mass % or more and 35 mass % or less, the sedimentation start time is 16 seconds or more, an amount of Al measured by a high-frequency inductively coupled plasma emission spectrometric analysis method is 1 ppm or less, and an amount of a sulfur atom measured by a high-frequency inductively coupled plasma emission spectrometric analysis method is 300 ppm or less in the organic polymer fine particle.