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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 10781321 B1

PDFFull Text
Date of Patent:
Sep. 22, 2020

Filed:

Feb. 10, 2016

Coating agent for oil seal

Applicant:

Nok Corporation, Tokyo, JP;

Inventors:

Natsumi Kimura, Kanagawa, JP;

Katsumi Abe, Kanagawa, JP;

Assignee:

NOK CORPORATION, Tokyo, JP;

Attorney:
Primary Examiner:

Cheng Yuan Huang

Int. Cl.
CPC ...
C09D 7/40 (2018.01); F16J 15/3284 (2016.01); F16J 15/3204 (2016.01); C09D 153/00 (2006.01); C09D 7/65 (2018.01); C09D 109/00 (2006.01); C09D 7/61 (2018.01); F16J 15/32 (2016.01); C08L 27/00 (2006.01); C08L 27/18 (2006.01); C08L 69/00 (2006.01); C08L 83/04 (2006.01); C08K 3/36 (2006.01);
U.S. Cl.
CPC ...
C09D 7/65 (2018.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01); C09D 7/68 (2018.01); C09D 7/69 (2018.01); C09D 109/00 (2013.01); C09D 153/00 (2013.01); F16J 15/3204 (2013.01); F16J 15/3284 (2013.01); C08K 3/36 (2013.01); C08L 27/00 (2013.01); C08L 27/18 (2013.01); C08L 69/00 (2013.01); C08L 83/04 (2013.01); F16J 15/32 (2013.01);
Abstract

A coating agent for oil seal comprising 10 to 160 parts by weight of a filler having a particle size of 0.5 to 30 □m based on 100 parts by weight of isocyanate group-containing 1,2-polybutadiene and being prepared as an organic solvent solution, wherein a contact angle between a substrate surface coated with the coating agent and engine oil is less than 35°. The coating agent can improve wettability with oil and reduce dynamic friction coefficient in oil, while increasing the roughness of the coating surface. Thus, low torque characteristics can be achieved, while maintaining excellent seal performance inherent in oil seal.

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