EP0565044A2
Expired / Lapsed
EP
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Ultraviolet-curing covering composition with hardwearing properties
Assignee: Mitsubishi Chemical Corp
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Filing: 1993-04-06
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Granted: —
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Expires: 2013-04-06
Abstract
Abstract An ultraviolet-curing covering composition comprising Component A which is obtained by reacting a hydroxyl group-containing polyfunctional acrylate with a silane coupling agent containing an isocyanate group(s), Component B of a polyfunctional acrylate having 3 or more acryloyl groups in the molecule, Component C of a silica sol in an orgnic solvent, and Component D of a photopolymerization initiator. This composition forms a coating film shows excellent hardwearing properties and adhesion to plastic substrates after ultraviolet-curing. By blending Component E of an acrylic resin and Component F of a solvent to the composition forms a coating film which can be processed before curing.
Inventors
- 👤 Noritaka c/o Mitsubishi Petrochem Co. Hosokawa
- 👤 Kazuhide c/o Mitsubishi Petrochem. Co. Hayama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 15:33
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F290/00; C08F290/08; C08F290/14; C08F290/147; C08F290/148
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
An ultraviolet-curing covering composition with hardwearing properties comprising: Component A: a compound which is obtained by reacting a hydroxyl group-containing polyfunctional acrylate having a hydroxyl group(s) and 3 or more acryloyl groups in the molecule with a silane coupling agent containing an isocyanate group(s) of the following general formula (1): ( wherein R¹ and R² are the same or different monovalent hydrocarbon groups, R³ is a divalent hydrocarbon group having from 2 to 8 carbon atoms; and a is an integer of 2 to 3, b is an integer of 0 to 1, and c is an integer of 1 or 2 which is equal to 4- a- b) ; Component B: a polyfunctional acrylate having 3 or more acryloyl groups in the molecule; Component C: a silica sol in an organic solvent as a dispersing medium; and Component D: a photopolymerization initiator.
Claim 2
Dependent Claim
46 words
The composition as claimed in claim 1 wherein the weight ratios of Component A / Conponent B are from 0.1 to 10, and the weight ratio of the silica sol solid content of Component C / [Component A + Component B] are from 0.1 to 5.
Claim 3
Dependent Claim
32 words
An ultraviolet-curing covering composition with hardwearing properties comprising following Component E and Component F in addition to the Components of claim 1: Component E: an acrylic resin; Component F: an organic solvent.
Claim 4
Dependent Claim
72 words
The composition as claimed in claim 3 wherein the ratios of Component A, Component B, the silica sol solid content of Component C and Component E relative to the total weight thereof are as follows: Component A + Component B 25-60% by weight Silica sol solid content of Component C 20-70% by weight Component E 5-35% by weight, and the weight ratio of Component A / Component B is 0.2 or more.
Claim 5
Dependent Claim
72 words
The composition as claimed in claim 3 wherein said acrylic resin of Component E is selected from the group consisting of the following Compounds (a) to (d): Compound (a): Polymers or copolymers of (meth)acrylic acid esters; compound (b): Polymers or copolymers of (meth)acrylic acid esters having (meth)acryloyl groups at their side chains; Compound (c): Acrylic silicone resins having alkoxysilyl groups; and Compound (d): Acrylic silicone resins having alkoxysilyl groups and polyorganosiloxane units.
Claim 6
Dependent Claim
42 words
The composition as claimed in claim 1 or 3 wherein said silane-coupling agent containing an isocyanate group(s) is selected from the group consisting of 3-isocyanatopropyl trimethoxysilane, 2-isocyanatoethyl trimethoxysilane, 3-isocyanatopropyl triethoxysilane, 2-isocyanatoethyl triethoxysilane, 3-isocyanatopropyl methyldimethoxysilane, 2-isocyanatoethyl methyl dimethoxysilane, 3-isocyanatopropyl methyldiethoxysilane and 2-isocyanatoethylmethyl diethoxysilane.
Claim 7
Dependent Claim
46 words
The composition as claimed in claim 1 or 3 wherein said hydroxyl group-containing polyfunctional acrylate having a hydroxyl group(s) and 3 or more acryloyl groups in the molecule of Component B is selected from the group consisting of dipentaerythritol hexacrylate, dipentaerythritol pentacrylate, and a mixture thereof.
Claim 8
Dependent Claim
26 words
The composition as claimed in claim 3 wherein a part of Component B is replaced by urethane-acrylate having 2 or more acryloyl groups in the molecule.
References Cited (Backward Citations)
No citation records indexed.
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