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US 5,356,971 AGranted
Thermosetting powder coating material
AssigneeNof Corporation
InventorsChiaki Sagawa, Manabu Katagiri, Toru Kurashina
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AssigneeNof Corporation
InventorsChiaki Sagawa, Manabu Katagiri, Toru Kurashina
Estimating the term…
A thermosetting powder coating composition which contains a resin composition containing (a) 60 to 97 weight % of a fluororesin having reactive group for crosslinking in the molecule which contains 10 weight % or more of fluorine and has glass transition temperature in the range from 35.degree. to 120.degree. C., (b) 3 to 40 weight % of a hardener which can form crosslinking by reaction with the reactive group for crosslinking in the fluororesin (a), (c) 0.01 to 10 weight parts of a synthetic wax or a natural wax based on 100 weight parts of the resin composition and (d) 0.001 to 1.0 weight parts of a material as a coupling agent based on 100 weight parts of the resin composition, forms a coating layer which has the same degree of water repellency and slipping property as those formed from polytetrafluoroethylene powder while the excellent weatherability, acid resistance and adhesion to substrates are retained. A coating layer having excellent adhesive property and impact resistance can be formed therewith on a stainless steel substrate without chemical pretreatment or coating with a primer.
A thermosetting powder coating composition comprising a resin composition containing (a) 60 to 97 weight % of a flouroresin having reactive group for crosslinking in the molecule which contains 10 weight % or more of fluorine and has glass transition temperature in the range from 35.degree. to 120.degree. C., (b) 3 to 40 weight % of a hardener which can form crosslinking by reaction with the reactive group for crosslinking in the flouroresin (a), (c) 0.01 to 10 weight parts of a synthetic wax or a natural wax based on 100 weight parts of the resin composition and (d) 0.001 to 1.0 weight parts of a material as a coupling agent based on 100 weight parts of the resin composition.
A thermosetting powder coating composition comprising a resin composition containing (a) 60 to 97 weight % of a component comprising (i) a fluororesin and (ii) a resin for thermosetting powder coating material, wherein the fluororesin has a reactive group for crosslinking in the molecule, contains 10 weight % or more of fluorine, has glass transition temperature in the range from 35.degree. to 120.degree. C. and is present in an amount of 99 to 50 weight % based on the total of (i) and (ii) and the resin has a reactive group and is present in an amount of 1 to 50 weight % based on the total of (i) and (ii), (b) 3 to 40 weight % of a hardener which can form crosslinking by reaction with the reactive group for crosslinking in the fluororesin (i) of (a), (c) 0.01 to 10 weight parts of a synthetic wax or a natural wax based on 100 weight parts of the resin composition and (d) 0.001 to 1.0 weight parts of a material as a coupling agent based on 100 weight parts of the resin composition.
A thermosetting powder coating composition comprising a resin composition containing (a) 60 to 97 weight % of a component comprising (i) a fluororesin and (ii) a thermoplastic resin, wherein the fluororesin has a reactive group for crosslinking in the molecule, contains 10 weight % or more of fluorine, has a glass transition temperature in the range from 35.degree. to 120.degree. C. and is present in an amount of 99 to 50 weight % based on the total of (i) and (ii) and the thermoplastic resin is present in an amount of 1 to 50 weight % based on the total of (i) and (ii), (b) 3 to 40 weight % of a hardener which can form crosslinking by reaction with the reactive group for crosslinking in the fluororesin of (a), (c) 0.01 to 10 weight parts of a synthetic wax or a natural wax based on 100 weight parts of the resin composition and (d) 0.001 to 1.0 weight parts of a material as a coupling agent based on 100 weight parts of the resin composition.
Dependencies are inferred from the claim text.