E.i. Dupont De Nemours and Company

The Chemours Company Fc, LLC

Philippe Andre Fernand Thomas

Clay Woodward Jones

Robert John Cavanaugh

Feng Dong

Theodore Arthur Treat

Kazuo Konabe

Daniel N Levy

Wim Marie-Thérèse Jacques Beatse

Xuepu Mao

Nelson Leonardo Giani Cardoso

Theodore A Treat

A substrate coated with a non-stick fluoropolymer coating is provided, the coating having excellent abrasion and scratch resistance. The coating contains: i.) a continuous primer layer adhered to the substrate containing a polymer binder, a first fluoropolymer and first inorganic film hardner particles, ii.) a discontinuous midcoat layer containing aggregate particles adhered to the primer layer and distributed discontinuously across the surface of the primer layer so as to reveal exposed areas of the surface of the primer layer, wherein a portion of the aggregate particles are in clusters, and wherein the aggregate particles contain second fluoropolymer and second inorganic film hardner particles, and iii.) a topcoat layer containing a third fluoropolymer adhered to the midcoat layer and the exposed areas of the surface of the primer layer at points where there is no midcoat layer.

Substrate coated with non-stick coating resistant to abrasion and scratching

An article includes a scratch resistant non-stick finish adhered to a substrate. The scratch resistant non-stick finish includes a primer layer, a midcoat layer, and a topcoat layer. The primer layer is adhered to the substrate and includes a first polymer binder and large ceramic particles, the midcoat layer includes a first fluoropolymer composition and inorganic whiskers, and the topcoat layer includes a second fluoropolymer composition.

Article with non-stick finish and improved scratch resistance

An aqueous dispersion composition of about 30 to about 70 weight % non-melt-processible fluoropolymer particles having a standard specific gravity (SSG) of less than 2.225 and about 2 to about 11 weight % surfactant based on the weight of said fluoropolymer comprising a compound or mixture of compounds of the formula:R(OCHCH)OHwherein R is a branched alkyl, branched alkenyl, cycloalkyl, or cycloalkenyl hydrocarbon group having 8-18 carbon atoms and n is an average value of 5 to 18. The fluoropolymer particles of the dispersion comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. Preferably, the aqueous dispersion composition comprises about 45 to about 65 weight % non-melt-processible fluoropolymer particles.

Concentrated fluoropolymer dispersions

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Helecine, Belgium

Philippe Andre Fernand Thomas