EP0282079A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coating composition with improved rust-preventing properties for use in preparing lubricated steel products
Assignee: NOF Corp
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Filing: 1988-03-11
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Granted: —
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Expires: 2008-03-11
Abstract
Abstract A coating composition based on an acrylic resin which is useful for preparing lubricated steel products such as steel sheets or tubes is disclosed. The coating composition contains as additives a rust preventive which is a mixture of a sulfonamidecarboxylic acid and a cyclic amine and a water repellent. It exhibits improved rust-preventing properties when lubricated steel products having a coating film formed from the coating composition are stored for a prolonged period under coiled or stacked conditions.
Inventors
- 👤 Hiroki Hanabata
- 👤 Hideo Kawaguchi
- 👤 Hiroshi Fukudome
- 👤 Ryoichi Noumi
- 👤 Hiromi Izaiku
- 👤 Koichi Komai
- 👤 Kisuke Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 19:21
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M169/044; C09; C09D; C09D5/00; C09D5/08; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064; C10M107/00; C10M107/20; C10M107/22; C10M107/28; C10M129/00; C10M129/02; C10M129/26; C10M129/28; C10M129/38; C10M129/40; C10M129/68; C10M129/70; C10M129/72; C10M129/74; C10M133/00; C10M133/02; C10M133/38; C10M133/40; C10M135/00; C10M135/08; C10M135/10; C10M143/00; C10M143/02; C10M147/00; C10M147/02; C10M2203/00; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/14; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/126; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/0845; C10M2209/086; C10M2209/0863; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/015; C10N2050/02; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A coating composition with improved rust-preventing properties suitable for use in preparing lubricated steel products, which comprises from 75 to 97.7% by weight of an acrylic resin having an acid value of from 20 to 160 and a glass transition temperature of from 5 to 100°C; from 0.3 to 5% by weight of a rust preventive consisting of a mixture of a sulfonamidecarboxylic acid and a cyclic amine; and from 2 to 20% by weight of a water repellent, based on the total solids content of the composition.
Claim 2
Dependent Claim
88 words
A coating composition with improved rust-preventing properties suitable for use in preparing lubricated steel products, which comprises from 75 to 97.7% by weight of an acrylic resin having an acid value of from 20 to 160 and a glass transition temperature of from 5 to 100°C; from 0.3 to 5% by weight of a rust preventive consisting of a mixture of a sulfonamidecarboxylic acid and a cyclic amine; and from 2 to 20% by weight of a water repellent, based on the total solids content of the composition.
Claim 3
Dependent Claim
28 words
A coating composition according to Claim 1, wherein the water repellent is selected from carboxylic acid esters, metallic soaps, polyethylene fine powder, and fine powder of fluorinated resins.
Claim 4
Dependent Claim
32 words
A coating composition according to Claim 1 or 2, wherein the acrylic resin has an acid value of from 40 to 120 and a glass transition temperature of from 10 to 85°C.
Claim 5
Dependent Claim
50 words
A coating composition according to any one of Claims 1 to 3, wherein the rust preventive is a mixture of a sulfonamidecarboxylic acid and a cyclic amine in which from 0.5 to 2.5 equivalent weights of the cyclic amine are present relative to each equivalent weight of the sulfonamidecarboxylic acid.
Claim 6
Dependent Claim
45 words
A coating composition according to any one of Claims 1 to 4 which comprises from 82 to 96.5% by weight of the acrylic resin, from 0.5 to 3% by weight of the rust preventive, and from 3 to 15% by weight of the water repellent.
Claim 7
Dependent Claim
34 words
A lubricated steel product with improved rust-preventing properties, which has on at least one surface thereof a dry coating film formed from a coating composition according to any one of Claims 1 to 5.
Claim 8
Dependent Claim
20 words
A lubricated steel product according to Claim 6, wherein the product is in the form of a sheet or tube.
Claim 9
Dependent Claim
24 words
A lubricated steel product according to Claim 6 or 7, wherein the dry coating film has a weight of from 0.2 to 6.0 g/m².
Claim 10
Dependent Claim
24 words
A lubricated steel product according to Claim 6 or 7, wherein the dry coating film has a weight of from 0.5 to 3.0 g/m².
References Cited (Backward Citations)
No citation records indexed.
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