Patent EP0177791A2 successfully refreshed from Google Patents.
EP0177791A2
Expired / Lapsed
EP
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Radiation curable primer coating compositions
Assignee: Nippon Paint Co Ltd
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Filing: 1985-09-12
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Granted: —
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Expires: 2005-09-12
Abstract
Abstract @ A radiation curable primer coating composition is provided comprising (a) a reaction product of an epoxide compound and an ethylenically unsaturated monocarboxylic acid, (b) a compound of the formula: or wherein R is hydrogen atom or methyl, A is a C 2 -C 4 alkylene group, and n is 0, 1 or 2; and (c) a compound having at least one epoxy group per molecule. The composition may be applied onto a steel substrate and cured by the irradiation of an actinic radiation for improving properties of subsequently applied polyolefin coatings thereon.
Inventors
- 👤 Koichi Yamada
- 👤 Iwao Sumiyoshi
- 👤 Ryoji Ishihara.
- 👤 Masakazu Ohkita
- 👤 Tetsuzo Arai
- 👤 Masanori Yoshiiwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
C; C09; C09J; C09J4/00; C08; C08F; C08F299/00; C08F299/02; C08F299/026; C08F299/028; C09D; C09D4/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
100 words
A radiation curable primer coating composition for use in forming polyolefin coating on a steel substrate comprising: (a) a reaction product of an epoxide compound and an ethylenically unsaturated monocarboxylic acid; (b) a compound of the formula: or wherein R is hydrogen atom or methyl, A is a C 2 -C 4 alkylene group, and n is 0, 1 or 2; and (c) a compound having at least one epoxy group per molecule; the composition containing said components (a), (b) and (c) in a preselected proportion to give a cured coating film having a glass transition temperature higher than 45°C.
Claim 2
Dependent Claim
100 words
A radiation curable primer coating composition for use in forming polyolefin coating on a steel substrate comprising: (a) a reaction product of an epoxide compound and an ethylenically unsaturated monocarboxylic acid; (b) a compound of the formula: or wherein R is hydrogen atom or methyl, A is a C 2 -C 4 alkylene group, and n is 0, 1 or 2; and (c) a compound having at least one epoxy group per molecule; the composition containing said components (a), (b) and (c) in a preselected proportion to give a cured coating film having a glass transition temperature higher than 45°C.
Claim 3
Dependent Claim
19 words
The radiation curable primer coating composition according to Claim 1 further comprising a radiation polymerizable liquid monomer and/or oligomer.
Claim 4
Dependent Claim
24 words
The radiation curable primer coating composition according to Claim 1, wherein the ratio of said component (a):component (b):component (c) is 40-80:20-60:1-15 on weight basis.
Claim 5
Dependent Claim
37 words
The radiation curable primer coating composition according to Claim 2, wherein the combined amount of said component (b) and said monomer and/or oligomer is less than 60 parts per 100 parts by weight of the entire composition.
Claim 6
Dependent Claim
28 words
The radiation curable primer coating composition according to Claim 1, wherein said component (a) is a reaction product of an epoxy resin and acrylic acid or methacrylic acid.
Claim 7
Dependent Claim
34 words
The radiation curable primer coating composition according to Claim 5, wherein said component (b) is dicyclopentenyl acrylate, dicyclopentyl acrylate, dicyclopentenyloxyethyl acrylate, dicyclopentyloxyethyl acrylate, dicyclopentenyloxyethoxyethyl acrylate, dicyclopentyloxy- ethoxyethyl acrylate or corresponding esters of methacrylic acid.
Claim 8
Dependent Claim
18 words
The radiation curable primer coating composition according to Claim 6, wherein said component (c) is an epoxy resin.
Claim 9
Dependent Claim
14 words
The radiation curable primer coating composition according to Claim 1 further comprising a photosensitizer.
Claim 10
Independent Claim
60 words
A method of forming a polyolefin protective coating on a steel substrate comprising the steps of extrusion coating the substrate with a modified polyolefin layer and then with a polyolefin protective layer successively, the improvement wherein said substrate is given a primer coating by applying the radiation curable composition of claims 1 - 8 and then irradiating an actinic radiation.
Claim 11
Dependent Claim
27 words
1 0 . The method according to Claim 9, wherein said actinic radiation is ultraviolet light, and wherein the radiation curable composition of Claim 8 is employed.
Claim 12
Dependent Claim
26 words
The method according to Claim 9 further comprising the step of applying a conversion coating onto the substrate prior to the application of said primer coating.
Claim 13
Dependent Claim
17 words
The method according to Claim 9, wherein said substrate is a steel pipe or a steel sheet.
References Cited (Backward Citations)
No citation records indexed.
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