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. 23, 2022
Filed:
Apr. 18, 2019
Nippon Shokubai Co., Ltd., Osaka, JP;
Ryo Nakamura, Hyogo, JP;
Yasutaka Nakatani, Hyogo, JP;
Yoichi Igawa, Hyogo, JP;
Erina Hanai, Hyogo, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
Provided are vinyl polymer microparticle which can reduce an average volume of the microparticles dropping off from a film surface while reducing the friction of the film. The vinyl polymer microparticles satisfy the following (1) to (3): (1) a coefficient of variation of particle sizes is 30% or more on a volume basis; (2) a proportion of vinyl polymer microparticles having a particle size of 1.7 times or more and 2.5 times or less a volume average particle size is 0.040% or less on a number basis; and (3) a volume average particle size is 3.7 μm or more.