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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.:

US 10174190 B1

PDFFull Text
Date of Patent:
Jan. 08, 2019

Filed:

Mar. 26, 2015

Composite particles, method for producing composite particles, and use thereof

Applicant:

Sekisui Plastics Co., Ltd., Osaka-shi, JP;

Inventors:

Mayumi Ando, Tenri, JP;

Toshiki Takenaka, Koka, JP;

Akiyoshi Kusaka, Tenri, JP;

Takashi Goto, Koka, JP;

Assignee:

SEKISUI PLASTICS CO., LTD., Osaka, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Robert S Jones

Int. Cl.
CPC ...
C08L 33/12 (2006.01); C08F 2/18 (2006.01); C09D 201/00 (2006.01); C08L 101/00 (2006.01); C08L 1/28 (2006.01); C09D 101/28 (2006.01); C09D 133/12 (2006.01); G02B 1/04 (2006.01); C08G 18/62 (2006.01); C08F 212/08 (2006.01); C08F 220/14 (2006.01); C08F 265/04 (2006.01); C08F 265/06 (2006.01); C09D 175/04 (2006.01); C09D 7/40 (2018.01);
U.S. Cl.
CPC ...
C08L 33/12 (2013.01); C08F 2/18 (2013.01); C08F 212/08 (2013.01); C08F 220/14 (2013.01); C08F 265/04 (2013.01); C08F 265/06 (2013.01); C08G 18/6225 (2013.01); C08L 1/284 (2013.01); C08L 101/00 (2013.01); C09D 7/40 (2018.01); C09D 101/284 (2013.01); C09D 133/12 (2013.01); C09D 175/04 (2013.01); C09D 201/00 (2013.01); G02B 1/04 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01);
Abstract

There are provided a method for producing particles by suspension polymerization which ensures an excellent dispersion stability of the monomer and a simpler washing step, composite particles obtainable by this production method, and use of the composite particles. The method for producing composite particles includes a polymerization step of subjecting a monomer mixture which contains a polymerizable vinyl monomer to aqueous suspension polymerization in a presence of small polymer particles having a volume-average particle size of 20 to 500 nm, with a water-soluble cellulose compound adsorbing on surfaces of the small polymer particles, and thereby obtaining composite particles which contain the small polymer particles and large polymer particles greater than the small polymer particles.

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