Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2207/00—Foams characterised by their intended use
  • C08J2207/02—Adhesive
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
  • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
  • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical

Definitions

• a crosslinked structure containing the component (c) is formed.
• the term "monomer for crosslinking" in the component (b) means a monomer which enables forming a crosslinked structure through a moiety derived from the monomer for crosslinking when incorporated into the copolymer.
• the crosslink contained in the crosslinked structure is formed, for example, by covalent bonding, acid-base interaction or a combination thereof. This crosslinked structure enhances foamability of the curable composition and even when the amount of the foaming adjuvant is small compared with the conventional composition, a foam having a desired content of air bubbles can be formed by inhibiting defoaming during molding and curing steps.
• the copolymer as the component (cl) is a crosslinked copolymer having a crosslink produced by the copolymerization reaction of the component (a) and the component (bl) (i.e., a crosslink through a covalent bond) (hereinafter, as concerns the first embodiment, the copolymer as the component (cl) is sometimes referred to as a crosslinked copolymer), and this crosslinked copolymer is present as a crosslinked structure in the curable composition.
• a crosslinked structure enhances foamability of the curable composition and even when the amount of the foaming adjuvant is small compared with the conventional composition, a foam having a desired content of air bubbles can be formed by inhibiting defoaming during molding and curing steps.
• the curing step can be carried out by irradiating the foamed curable composition with radiation such as ultraviolet light or an electron beam when a photopolymerization initiator is used.
• radiation such as ultraviolet light or an electron beam
• the curing step can be carried out by heating the foamed curable composition. Since curing is carried out at low temperature within a comparatively short time, the foamed curable composition is preferably cured by irradiating with ultraviolet light. In this case, since oxygen in the air tends to inhibit ultraviolet polymerization, the curing step is preferably carried out in an inert gas such as nitrogen, argon or carbon dioxide.
• a crosslinked structure in which the component (c2) is crosslinked through the component (b2) in the component (c2) and the thermally conductive filler is formed in the curable composition.
• a plurality of copolymer molecules are attracted to the thermally conductive filler through an acid-base interaction brought about between the carboxyl group derived from the component (b2) contained in the component (c2) and the basic group present on the particle surface of the thermally conductive filler, as a result, a crosslink is formed among the plurality of copolymer molecules.
• Ten sheets thus obtained were laminated and cut into a size measuring 15 mm x 15 mm to obtain a measuring sample.
• the load required for the measuring sample to compress to 75% of an initial thickness per unit area in a thickness direction (25% compressive load) was measured.
• the sample was compressed at a rate of 0.5 mm/min using TENSILON and a maximum value when the thickness was compressed by 25% was measured.
• the measurement was carried out using two samples and the average was taken as a compressive stress. As the compressive load value becomes smaller, it is possible to satisfactorily adhere to the adherend under a low contact pressure.
• the content of the copolymer in the partial polymer was determined in the following manner. 1.0 g of the resulting partial polymer was weighed in a stainless steel plate (a diameter of the bottom: 4.0 cm) and then dried under a nitrogen atmosphere at 13O 0 C for 2 hours to obtain a solid (copolymer). The solid was weighed and the content
• the viscosity of the partial polymer obtained from the components in the item A and the viscosity of a mixture of the partial polymer obtained from the components in the item A with the components in the item B are shown in Table 7. Also, in Table 7, the content of the copolymer contained in the partial polymer is shown by a weight percentage based on the weight of the partial polymer.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Adhesive Tapes (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (6)

Cited By (8)

Families Citing this family (17)

Family Cites Families (8)

• 2008
  • 2008-04-25 JP JP2008116163A patent/JP2009263542A/ja active Pending
• 2009
  • 2009-04-20 JP JP2011506373A patent/JP2011518920A/ja not_active Withdrawn
  • 2009-04-20 CN CN2009801146243A patent/CN102015948A/zh active Pending
  • 2009-04-20 WO PCT/US2009/041066 patent/WO2009131920A2/en not_active Ceased
  • 2009-04-20 US US12/988,084 patent/US20110031435A1/en not_active Abandoned
  • 2009-04-20 KR KR1020107026308A patent/KR20110005290A/ko not_active Withdrawn
  • 2009-04-24 TW TW098113785A patent/TW200948924A/zh unknown

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