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:
Mar. 14, 2023
Filed:
Dec. 13, 2019
Daikin Industries, Ltd., Osaka, JP;
Daikin America, Inc., Orangeburg, NY (US);
Kozue Komazawa, Osaka, JP;
Kyle Brundin, Orangeburg, NY (US);
Yuuki Kuwajima, Osaka, JP;
Yosuke Nishimura, Osaka, JP;
Steve Mariconti, Orangeburg, NY (US);
Takeshi Inaba, Orangeburg, NY (US);
DAIKIN INDUSTRIES, LTD., Osaka, JP;
DAIKIN AMERICA, INC., Orangeburg, NY (US);
Abstract
Adding silica particles having specified collective characteristics to a fluororubber formulation enhances direct adhesion between the fluororubber formulation and a copolymer upon curing. Specifically, as measured before being mixed into the fluororubber formulation, the silica particles have an average value of the product '(particle size)×(circularity)' that is 17.5 nm or higher and 500 μm or lower. The silica particles may also have an average particle size of between 25.0 nm inclusive and 500 μm inclusive, and an average circularity of 0.80 or higher. Alternatively, as measured after being incorporated into the fluororubber formulation and then cured, the silica particles have an apparent average value of the product '(particle size)×(circularity)' that is 32.0 nm or higher and 500 μm or lower. The silica particles may also have an apparent average particle size of between 40.0 nm inclusive and 500 μm inclusive as measured after being incorporated into the fluororubber formulation and then cured.