Antiadhesive coating with improved scratch resistance

Details Antiadhesive coating with improved scratch resistance Antiadhesive coating with improved scratch resistance

2001-09-12

2003-07-22

Zacharia, Ramsey (Department: 1773)

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

C428S335000, C428S411100, C428S473500, C428S474400, C428S422000, C427S202000, C427S282000, C427S374200, C427S385500, C427S388100, C427S409000, C427S470000

Reexamination Certificate

active

06596380

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a non-stick coating with improved scratch resistance.
Non-stick coatings applied to cookware are known. Such coatings are also known to be prone to scratching.
Such coatings are routinely applied to a hard undercoat of alumina, enamel, stainless steel or polyamide-imide (PAI) to improve their scratch resistance.
In principle, that undercoat forms a barrier that prevents scratches from reaching the surface of the substrate.
SUMMARY OF THE INVENTION
The present invention aims to provide a non-stick coating with a scratch resistance that is improved over known coatings, while retaining excellent non-stick properties.
The invention provides a non-stick coating with improved scratch resistance, comprising an undercoat applied to a substrate, coated with a primary coat comprising a fluorocarbon resin and one or more fluorocarbon resin-based outer coats.


REFERENCES:
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patent: 5536583 (1996-07-01), Roberts et al.
patent: 5846645 (1998-12-01), Yokota et al.
patent: 6382545 (2002-05-01), Yeh
patent: 0100889 (1984-02-01), None
patent: 0343282 (1989-11-01), None
patent: 0367884 (1990-05-01), None
patent: 0786290 (1997-07-01), None
patent: WO 89/00757 (1989-01-01), None

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