Dupont-mitsui Fluorochemicals Company, Ltd.

E.i. Dupont De Nemours and Company

The Chemours Company Fc, LLC

Yuqing Liu

Yuji Mochizuki

Osamu Hayakawa

The present invention provides a polymer particle comprising a polymer and a filler contained therein, wherein the polymer is soluble in an organic solvent and is also water insoluble, and wherein the polymer particle contains from 5 to 500 parts by weight of filler per 100 parts by weight of polymer, and a mean particle size of 75 &#x3bc;m or less. The invention also provides an aqueous dispersion including this particle; an aqueous fluororesin coating composition that uses this aqueous dispersion; and a fluororesin laminate or layered coating having a layer obtained from this fluororesin coating composition.

Polymer particle, aqueous dispersion including the same, and fluororesin coating composition using the same

The present invention provides for a substrate coated with a multi-layer non-stick coating which resists abrasion force and corrosion. The coating comprises a pre-primer base coat layer and at least two further coating layers, wherein at least two of said further coating layers comprise one or more fluoropolymer. The pre-primer base coat layer is substantially free of fluoropolymer, and comprises a heat resistant non-fluoropolymer polymer binder composition and inorganic filler particles, wherein greater than 50% of the inorganic filler particles are titanium dioxide, and wherein at least 10 weight % of said inorganic filler particles are large ceramic particles having an average particle size of at least 14 micrometers, and wherein some or all of the large ceramic particles extend from the pre-primer base coat layer at least into the next adjacent layer. The heat resistant non-fluoropolymer binder is preferably selected from the group consisting of polyimide (PI), polyamideimide (PAI), polyether sulfone (PES), polyphenylene sulfide (PPS) and a mixture thereof.

Non-stick coating having improved abrasion resistance, hardness and corrosion on a substrate

A functionalized fluoropolymer, preferably with phosphate functionality, can be coated on a metal oxide containing rubber substrate, which coating, after heating, results in a fluoropolymer-rubber substrate laminate without degradation of the rubber, and with good adhesion between the fluoropolymer and the rubber.

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Shizuoka, Japan

Yuqing Liu