CURABLE COMPOSITION AND SEALING METHOD

• US 20090025870A1
• Filed: 06/30/2006
• Published: 01/29/2009
• Est. Priority Date: 06/30/2005
• Status: Active Grant

• Current Assignee: Threebond Fine Chemical Co., Ltd.
• Original Assignee: ThreeBond Co., Ltd.
• Inventors: Tanaka, Masayuki
• Granted Patent: US 8,038,832 B2
• Time in Patent Office: Days
• US Class Current: 156/273.300
• CPC Class Codes: C08F 220/20 of polyhydric alcohols or phenols , e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
• CPC Class Codes: C08F 220/26 Esters containing oxygen in addition to the carboxy oxygen
• CPC Class Codes: C08F 230/085 the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes
• CPC Class Codes: C08F 265/04 on to polymers of esters
• CPC Class Codes: C08F 265/06 Polymerisation of acrylate or methacrylate esters on to polymers thereof
• CPC Class Codes: C08F 290/04 Polymers provided for in subclasses C08C or C08F
• CPC Class Codes: C08F 290/06 Polymers provided for in subclass C08G
• CPC Class Codes: C08F 292/00 Macromolecular compounds obtained by polymerising monomers on to inorganic materials
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C09D 151/10 grafted on to inorganic materials
• CPC Class Codes: C09J 151/10 grafted on to inorganic materials
• CPC Class Codes: C09K 2200/0247 Silica
• CPC Class Codes: C09K 2200/0625 Polyacrylic esters or derivatives thereof
• CPC Class Codes: C09K 3/10 Materials in mouldable or extrudable form for sealing or packing joints or covers filling pastes C09D5/34

Abstract

An object of the present invention is to provide a curable composition excellent in on-site formability, excellent in heat resistance, chemical resistance and oil resistance, and low in compression set. The invention relates to a curable composition comprising (a) a vinyl-based polymer containing at least one (meth)acryloyl group in a molecule thereof and having a number average molecular weight of 500 to 1,000,000, (b) an ethylenic unsaturated group-containing compound, (c) a thixotropic property-imparting agent, (d) fumed silica surface-treated with a (meth)acryloyl group-containing silane and (e) a photopolymerization initiator.

Claims

1. A curable composition comprising (a) a vinyl-based polymer containing at least one (meth)acryloyl group in a molecule thereof and having a number average molecular weight of 500 to 1,000,000, (b) an ethylenic unsaturated group-containing compound, (c) a thixotropic property-imparting agent, (d) fumed silica surface-treated with a (meth)acryloyl group-containing silane and (e) a photopolymerization initiator.

2. The curable composition according to claim 1, wherein component (a) is one produced by a living radical polymerization method.

3. A sealing method comprising the steps of applying a curable composition comprising (a) a vinyl-based polymer containing at least one (meth)acryloyl group in a molecule thereof and having a number average molecular weight of 500 to 1,000,000, (b) an ethylenic unsaturated group-containing compound, (c) a thixotropic property-imparting agent, (d) fumed silica surface-treated with a (meth)acryloyl group-containing silane and (e) a photopolymerization initiator to at least one side of an article to be sealed, curing the composition by light irradiation, and then, contacting another article to be sealed to the cured composition with pressure.