EP0254523A2
Expired / Lapsed
EP
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Primer compositions
Assignee: NOF Corp
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Filing: 1987-07-20
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Granted: —
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Expires: 2007-07-20
Abstract
Abstract A primer composition usable for steel sheet and plastic sheet in vehicle bodies consists essentially of a component A composed of a resin obtained by graft-polymerizing a styrene-butadiene-styrene block copolymer or its hydrogenated polymer with alpha , beta -unsaturated carboxylic acid or its anhydride, a component B of a crosslinking agent and a component C of an epoxy compound, and has particular weight ratios as solid content of component A to component B and components A+B to component C.
Inventors
- 👤 Shosaku Yamamoto
- 👤 Fumio Sodeyama
- 👤 Kazuo Kakinuma
- 👤 Junji Mayumi
- 👤 Richiro Maruta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 06:25
CPC Classifications
C; C09; C09D; C09D163/00; C09D151/00; C09D151/006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A primer composition consisting essentially of a resin obtained by graft-polymerizing a styrene-butadiene-styrene block copolymer or its hydrogenated polymer with α,β-unsaturated carboxylic acid or its anhydride (component A), a crosslinking agent (component B) and an epoxy compound (component C), and having a weight ratio as solid content of component A to component B within a range of 99/l∼60/40 and a weight ratio as solid content of components A+B to component C within a range of l00/l∼l00/50.
Claim 2
Dependent Claim
76 words
A primer composition consisting essentially of a resin obtained by graft-polymerizing a styrene-butadiene-styrene block copolymer or its hydrogenated polymer with α,β-unsaturated carboxylic acid or its anhydride (component A), a crosslinking agent (component B) and an epoxy compound (component C), and having a weight ratio as solid content of component A to component B within a range of 99/l∼60/40 and a weight ratio as solid content of components A+B to component C within a range of l00/l∼l00/50.
Claim 3
Dependent Claim
30 words
The primer composition according to claim l, wherein said α,β-unsaturated carboxylic acid is selected from acrylic acid, methacrylic acid, maleic acid, itaconic acid, citraconic acid, crotonic acid and fumaric acid.
Claim 4
Dependent Claim
17 words
The primer composition according to claim l, wherein said anhydride of α,β-unsaturated carboxylic acid is maleic anhydride.
Claim 5
Dependent Claim
28 words
The primer composition according to claim l, wherein said α,β-unsaturated carboxylic acid or its anhydride is contained in said component A in an amount of 0.05∼l0% by weight.
Claim 6
Dependent Claim
30 words
The primer composition according to claim l, wherein said component B is selected from modified amino resins, polymerizable unsaturated group containing compounds, acrylic resins, polyisocyanate compounds and blocked isocyanate compounds.
Claim 7
Dependent Claim
27 words
The primer composition according to claim l, wherein said component C is selected from epoxy compounds containing at least one epoxy group in molecule and mixtures thereof.
Claim 8
Dependent Claim
28 words
The primer composition according to claim l, wherein said primer composition further contains a pigment at a ratio of pigment to components A+B+C of not more than 2.0.
Claim 9
Dependent Claim
20 words
The primer composition according to claim l, wherein said primer composition further contains 50∼98% by weight of an organic solvent.
References Cited (Backward Citations)
No citation records indexed.
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