JP2005232320A - Thermally disappearing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermally disappearing material which hardly undergoes deterioration or decomposition at an ordinary service temperature while disappears in a short time by heating at a relatively low temperature. <P>SOLUTION: The thermally disappearing material comprises a copolymer (A), which is obtained by polymerizing a polymerizable monomer represented by general formula (1) (wherein R1, R2, R3 and R4 are each a functional group selected from among hydrogen and alkyl groups; and R1, R2, R3 and R4 may be the same functional group or a combination of different functional groups, and in the case that they are an alkyl group, they may arbitrarily bear a functional group other than the alkyl group) with other polymerizable monomers and has at least a polyoxyalkylene structure in any moiety of a side chain, an end and a main chain where the side chain or the end bears a crosslinkable functional group, and a crosslinking agent (B), and gives by crosslinking and curing a cured product which disappears by heat. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat extinguishing material that hardly deteriorates or decomposes at a normal use temperature and disappears in a short time by heating at a relatively low temperature.

  Conventionally, in order to protect parts that are easily damaged during processing and transportation, as well as applications that are temporarily fixed in place when joining parts to each other in the assembly process, parts and housing, parts and board, Adhesive tape is stuck on the surface. However, when sticky adhesive tape is used for temporary fixing or surface protection, it may be difficult to peel off, or the adherend may be damaged or adhesive residue may be left at the time of peeling. was there.

In recent years, recycling of vehicles, home appliances, and building materials has been carried out, and it has been urged to recycle bonding members using adhesives.
In addition, a transfer sheet using an adhesive sheet is used as an efficient transfer method because a plurality of components arranged on the sheet can be transferred at a time. Furthermore, the adhesive sheet can also be used as a reinforcing material for the parts to be transferred. For example, fragile parts such as ultra-thin semiconductor wafers and semiconductor chips can be transferred without damage. Here, the transfer sheet is required to have a high adhesive force to the adherend before transfer and to be easily peeled off during transfer.
As described above, an adhesive sheet or the like that has a high adhesive force as long as necessary and easily peels when peeled is required in many applications.

  As such an adhesive sheet, for example, an adhesive sheet capable of reducing the adhesive force by stimulating the adhesive such as a heat-foaming adhesive sheet, a thermosetting adhesive sheet, and a photocurable adhesive sheet is known. It was. However, there is a limit to the adhesive force that can be reduced using these adhesive sheets. In reality, it does not have a sufficiently high adhesive force before transfer, or the adhesive force is sufficiently reduced during transfer. It was not.

  Patent Document 1 discloses a heat extinguishing adhesive sheet in which the sheet mass disappears by 95% or more by heat treatment at about 700 ° C. for 30 minutes or less. According to the disclosure in Patent Document 1, if this heat extinguishing adhesive sheet is used, the sheet itself can be extinguished by heating, and the heat extinguishing adhesive sheet can withstand the explosion-proof treatment of the cathode ray tube. However, when heated at such a high temperature, it was considered that the adherend also deteriorated or denatured.

  Furthermore, Patent Document 2 discloses a ceramic molding binder comprising a water-soluble polyalkylene glycol, a novel comb-shaped hydrophobic diol, and a polyisocyanate, which has a slow heat generation during degreasing, a low heat generation amount, and a low residual carbon ratio. It is disclosed. However, since the binder resin disclosed in Patent Document 2 is a urethane resin obtained by the reaction of a diol and an isocyanate, there is a problem that a yellowing residue that seems to be an oxide derived from a urethane bond remains although there are few decomposition residues. there were. Therefore, it may be difficult to obtain a clean surface.

JP 11-293207 A JP 2000-355618 A

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a heat extinguishing material that hardly deteriorates or decomposes at a normal use temperature and disappears in a short time by heating at a relatively low temperature.

That is, the present invention is as follows.
(1) Obtained by polymerizing a polymerizable monomer represented by the following general formula (1) and another polymerizable monomer,
A copolymer (A) having at least a polyoxyalkylene structure at any one of the side chain, terminal and main chain and having a crosslinkable functional group at the side chain or terminal; and a crosslinking agent (B). A heat extinguishing material characterized in that a cured product containing, cross-linked and cured is extinguished by heat.

(Wherein R1, R2, R3 and R4 each represent a functional group selected from hydrogen and an alkyl group, and R1, R2, R3 and R4 may be the same functional group or different functional groups. (In the case of an alkyl group, a functional group different from the alkyl group may be optionally substituted.)

(2) The cured product obtained by crosslinking and curing has a property that 95% by mass or more of the total mass of the cured product disappears within 10 minutes in a temperature atmosphere of 200 to 500 ° C. (1) Heat extinguishing material.
(3) The crosslinkable functional group is at least one selected from a hydrolyzable silyl group, an isocyanate group, an epoxy group, an oxetanyl group, an acid anhydride group, a carboxyl group, a hydroxyl group, and a polymerizable unsaturated hydrocarbon group. The heat extinguishing material according to (1) or (2) above, wherein (4) The heat extinguishing material according to any one of (1) to (3), wherein the copolymer (A) contains 20 to 70% by mass of a polyoxyalkylene structure.
(5) The copolymer (A) is a (meth) acrylic acid alkyl ester, a (meth) acrylic acid ester having polyoxyalkylene as an ester residue, and a (meth) acrylic acid ester having a crosslinkable functional group. The heat extinguishing material according to any one of (1) to (4) above,
(6) The heat-extinguishing material according to (5), wherein the homopolymer of the alkyl (meth) acrylate has a glass transition temperature (Tg) of 20 ° C. or lower.
(7) The heat extinguishing material according to any one of (1) to (6) above, wherein the copolymer (A) has a number average molecular weight of 5,000 to 5,000,000.

(8) The heat extinguishing material according to any one of (1) to (7), wherein the heat extinguishing material contains a decomposition accelerator.
(9) The heat extinguishing material according to (8), wherein the decomposition accelerator is a peroxide. (10) The heat extinguishing material according to (8), wherein the decomposition accelerator is an azo compound.
(11) The heat extinguishing material according to (8), wherein the decomposition accelerator is tin oxide. (12) The heat extinguishing material according to any one of (1) to (7), wherein the heat extinguishing material contains a decomposition retarder.
(13) The heat extinguishing material according to (12), wherein the decomposition retarder is any one of a mercapto compound, an amine compound, organic tin, and organic boron.

(14) The heat extinguishing material according to any one of (1) to (7), wherein the heat extinguishing material contains 30% by mass or less of a compound having a polymerizable unsaturated group.
(15) The heat-extinguishing material according to any one of (1) to (14), wherein the viscosity at 20 ° C. is 1 to 5 million mPa · s.

(16) Viscosity at 20 ° C. of 1 to 100 mPa · s (15)
Heat extinguishing material.
(17) Viscosity at 20 ° C. is 500 to 100,000 mPa · s (1)
5) Heat extinguishing material.
(18) Viscosity at 20 ° C. is 20 to 1000 mPa · s (1)
5) Heat extinguishing material.

(19) The heat extinguishing material according to (7), wherein the copolymer (A) has a number average molecular weight of 5,000 to 5,000,000.
(20) The heat extinguishing material according to (1), wherein the cured product is extinguished by heating to a predetermined temperature of 200 to 400 ° C. in an atmosphere containing oxygen.
(21) The heat extinguishing material according to (1), wherein the cured product disappears by heating to a predetermined temperature in 350 to 500 ° C. in an anaerobic atmosphere.
(22) The heat extinguishing material according to (1), wherein the cured product is extinguished by heating to a predetermined temperature of 200 to 500 ° C. within 5 minutes under reduced pressure.
(23) The heat extinguishing material according to (1) above, wherein the cured product disappears in a temperature atmosphere of 200 to 300 ° C.
(24) The heat extinguishing material according to (1), wherein the cured product disappears in a temperature atmosphere of 300 to 400 ° C.
(25) The heat extinguishing material according to (1) above, wherein the cured product disappears in a temperature atmosphere of 400 to 500 ° C.
(26) A heat extinguishing material, characterized in that the heat extinguishing material according to any one of (1) to (25) is a cured product obtained by crosslinking and curing.

  The heat extinguishing material (1) of the present invention hardly deteriorates or decomposes at room temperature, crosslinks with light or the like to become a cured product, and the cured product is heated at a relatively low temperature within a short time. Can be extinguished. Specifically, 95% by mass or more of the total mass of the cured product can be eliminated within 10 minutes in a temperature atmosphere of 200 to 500 ° C.

The heat extinguishing material (3) of the present invention includes a hydrolyzable silyl group, an isocyanate group, an epoxy group, an oxetanyl group, an acid anhydride group as a crosslinkable functional group of the copolymer (A).
By applying at least one selected from a carboxyl group, a hydroxyl group, and a polymerizable unsaturated hydrocarbon group, known crosslinking reaction conditions can be selected, so that the crosslinking reaction can be easily controlled.

That is, in the case of a hydrolyzable silyl group, a Lewis acid such as organotin, organoaluminum, or organoboron, an inorganic acid such as hydrochloric acid, or a known crosslinking agent such as triethylamine / ammonia / sodium hydroxide can be used.
In the case of an isocyanate group, a known crosslinking agent such as a polyhydric alcohol, a polyvalent amine, organic tin, or a compound having a plurality of acid anhydride structures in one molecule can be used.
In the case of an epoxy group, known compounds such as a compound having a plurality of primary amino groups, a tertiary amine, a compound having a plurality of carboxyl groups, a photoacid generator, a photoamine generator, and a compound having a plurality of acid anhydride structures in one molecule. The crosslinking agent can be used.
In the case of an oxetanyl group, a known crosslinking agent such as a photoacid generator can be used.

In the case of an acid anhydride group, a known crosslinking agent such as a polyhydric alcohol or a compound having a plurality of primary amino groups can be used.
In the case of a carboxyl group, a known crosslinking agent such as a compound having a plurality of epoxy groups or a compound having a plurality of hydroxyl groups can be used.
In the case of a hydroxyl group, a known crosslinking agent such as a compound having a plurality of isocyanate groups can be used.
In the case of a polymerizable unsaturated hydrocarbon group, a known crosslinking agent such as an organic peroxide, a polyvalent mercaptan, or a compound having a plurality of primary amino groups can be used.

Further, the heat extinguishing material (4) of the present invention contains 10 to 70% by mass of a polyoxyalkylene structure in the copolymer (A) under an atmosphere of 200 to 500 ° C. In some cases, 95% by mass or more of the total mass of the cured product can be easily eliminated in a time shorter than a minute.
In addition, in the heat extinguishing material (5) of the present invention, the copolymer (A) is composed of (meth) acrylic acid alkyl ester and (meth) acrylic acid ester having polyoxyalkylene as an ester residue. , By copolymerization with a (meth) acrylic acid ester having a crosslinkable functional group, the crosslinkable functional group is cross-linked to form a strong film, or the side chain alkyl (meth) acrylate ester ( By selecting R4) in Formula 1, it becomes possible to easily obtain a cohesive force according to the usage.
Further, the heat extinguishing material (6) of the present invention has a glass transition temperature (Tg) of the homopolymer of the above (meth) acrylic acid alkyl ester of 20 ° C. or less, so that the heat extinguishing property of the present invention. A sticky feeling comes out to the material, and the temporary fixability and temporary fixability of the heat extinguishing material are easily developed.
In addition, the crosslinkable resin composition (7) of the present invention has a number average molecular weight of 5 to 5 million because the copolymer (A) does not become too volatile and the present invention disappears. The material can be handled more stably, and quick disappearance is more certain.

Moreover, the crosslinkable resin composition (8) of the present invention can be extinguished at a lower temperature or in a shorter time by including a decomposition accelerator.
In the heat extinguishing material (9) of the present invention, the decomposition accelerator based on the decomposition accelerator can keep the decomposition residue based on the peroxide low.
Further, the heat extinguishing material according to (10) of the present invention is a decomposition product because the decomposition accelerator is an azo compound, so that the decomposition of the azo compound is caused simultaneously with the acceleration of the decomposition by the accelerator. Can promote the volatility.
In addition, the heat extinguishing material (12) of the present invention includes a decomposition retarder, whereby the extinction time and temperature can be controlled to be suitable for each application.
Further, the heat extinguishing material according to (13) of the present invention constitutes the heat extinguishing material of the present invention when the decomposition retarder is any one of a mercapto compound, an amine compound, organic tin, and organic boron. The decomposition of polyoxyalkylene can be delayed.

In addition, the heat extinguishing material (14) of the present invention contains 30% by mass or less of a compound having a polymerizable unsaturated group, so that the characteristics of the heat extinguishing material of the present invention can be maintained and further increased. Curability can be obtained.
In addition, the heat extinguishing material (15) of the present invention has a viscosity of 1 to 5 million mPa · s at 20 ° C., so that it does not easily deteriorate or decompose at normal operating temperatures and maintains the paste form. be able to.
Further, the heat extinguishing material (16) of the present invention has a viscosity of 1 to 100 mPa · s at 20 ° C., so that it is uniformly formed in a desired region by a spin coating method, a pulling method, a dipping method, or the like. can do.
The heat extinguishing material (17) of the present invention can be formed in a desired region by a brush coating method or the like when the viscosity at 20 ° C. is 500 to 100,000 mPa · s.
In addition, the heat extinguishing material (18) of the present invention has a viscosity at 20 ° C. of 20 to 1000 mPa · s, so that it can be formed in a desired pattern by a screen printing method or the like.
The heating extinguishing material of the invention described above (19), by the number average molecular weight of the co-polymer (A) is from 5,000 to 5,000,000, even before curing, preferably sheet form at room temperature It is possible to maintain the shape of the solid matter such as.

In the heat extinguishing material (20) of the present invention, the cured product has an increased decomposition rate under an oxygen-containing atmosphere, and can be decomposed at a lower temperature and reduce residue residue. Can do. Utilizing this property, this heat extinguishing material can be extinguished by heating to a predetermined temperature of 200 to 400 ° C. in an oxygen-containing atmosphere that cannot be heated to the original decomposition temperature. Application in various fields becomes possible.
Further, in the heat extinguishing material (21) of the present invention, the decomposition rate of the cured product decreases in an anaerobic atmosphere. For this reason, when used for forming a fine pattern, a highly accurate pattern can be formed. In addition, the decomposition temperature can be increased in an anaerobic atmosphere. In addition, by heating to a predetermined temperature of 350 to 500 ° C. in an anaerobic atmosphere and extinguishing it, it can be prevented from decomposing at the original decomposition temperature, and the application range can be widened.
That is, the heating temperature can be lowered by increasing the oxygen concentration in the atmosphere. Further, if the oxygen concentration in the atmosphere is lowered, the decomposition can be started at a higher temperature without being decomposed at the heating temperature in the atmosphere. Therefore, the decomposition temperature of the heat extinguishing material can be adjusted in a wide range depending on the oxygen concentration in the atmosphere.
Further, the heat extinguishing material (22) of the present invention can reduce the residue of the cured product because the product becomes more volatile by decomposition under reduced pressure. In addition, since the heating time can be reduced by disappearing by heating to a predetermined temperature of 200 to 500 ° C. under reduced pressure for 5 minutes or less, it can be applied to materials that are easily damaged by heating. .

In the heat extinguishing material (23) of the present invention, the cured product disappears in a temperature atmosphere of 200 to 300 ° C., thereby temporarily fixing optical components and mounting a semiconductor device using low-temperature solder. Since it can be extinguished, etc., it can be used for temporary fixing or applied to various purposes.
In addition, the heat extinguishing material (24) of the present invention is extinguished in a semiconductor device mounting process using lead-free solder, etc., when the cured product disappears in a temperature atmosphere of 300 to 400 ° C. Therefore, it can be used for temporary fixing or applied to various purposes.
The heat extinguishing material (25) of the present invention is also applicable to the case where a porous thin film is formed on an aluminum wiring when the cured product disappears in a temperature atmosphere of 400 to 500 ° C. It is possible and can be applied to various uses.

  The heat extinguishing material of the present invention hardly deteriorates or decomposes at a normal use temperature, and the cured product can be extinguished in a short time by heating at a relatively low temperature.

The present invention is described in detail below.
The heat extinguishing material of the present invention is obtained by polymerizing a polymerizable monomer represented by the following general formula (1) and another polymerizable monomer, and is any one of a side chain, a terminal, and a main chain. It contains a copolymer (A) having at least a polyoxyalkylene structure at a site and having a crosslinkable functional group at its side chain or terminal, and a crosslinking agent (B).

(Wherein R1, R2, R3 and R4 each represent a functional group selected from hydrogen and an alkyl group, and R1, R2, R3 and R4 may be the same functional group or different functional groups. (In the case of an alkyl group, a functional group different from the alkyl group may be optionally substituted.)

  The polymerizable monomer represented by the general formula (1) is not particularly limited, but is methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, tert-butyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl methacrylate. , N-octyl methacrylate, isooctyl methacrylate, octadecyl methacrylate, isononyl methacrylate, isomyristyl methacrylate, lauryl methacrylate, stearyl methacrylate, isobornyl methacrylate, ethyl-α-methyl acrylate, ethyl-α-ethyl acrylate, ethyl-α- Examples include butyl acrylate.

Although it does not specifically limit as another polymerizable monomer polymerized with the polymerizable monomer shown by the said General formula (1), Methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, tert-butyl acrylate , Cyclohexyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate, isooctyl acrylate, isononyl acrylate, isomyristyl acrylate, stearyl acrylate, isobornyl acrylate, benzyl (meth) acrylate, 2-butoxyethyl (meth) acrylate 2-phenoxyethyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, poly Ethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol di (meth) acrylate, Pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, epoxy acrylate, polyester acrylate, urethane acrylate, pentaerythritol tri (meth) acrylate, styrene, indene, α-methylstyrene , P-methylstyrene, p-chlorostyrene, p-chloromethylstyrene, p-methoxystyrene, pt Examples thereof include ert-butoxystyrene, divinylbenzene, maleic anhydride, N-cyclohexylmaleimide, N-phenylmaleimide, N-benzylmaleimide, N-laurylmaleimide and the like.

  Although it does not specifically limit as a polyoxyalkylene structure of the said copolymer (A), For example, a polyoxypropylene structure, a polyoxyethylene structure, a polyoxytetramethylene structure etc. are mentioned. Especially, it is preferable to use as a mixed structure of a polyoxypropylene structure and a polyoxyethylene structure and / or a polyoxytetramethylene structure, and the content of the polyoxypropylene structure in the mixed structure is 50% by mass or more. Is more preferable. If such a mixed structure is used, the temperature at which it disappears and the time until it disappears can be adjusted by adjusting the mixing ratio of the polyoxyalkylene structure. In addition, when used as a mixed structure with solid polyoxyethylene and / or polyoxytetramethylene, there is no tackiness, and the properties can be varied widely from hot melt type heat extinguishing materials to tacky heat extinguishing materials. preferable.

  The polyoxyalkylene structure means a structure having two or more repeating units represented by the following general formula (2).

In the formula (2), n represents an integer of 1 or more, and R ¹ⁿ and R ²ⁿ are n-th substituents, and are hydrogen, alkyl group, aryl group, alkenyl group, hydroxyl group, carboxyl group, epoxy group, amino group. The substituent obtained by combining 1 or more types selected from the group which consists of group, an amide group, an ether group, and ester group is represented.

In addition, when the repeating unit represented by the general formula (2) is one, it becomes difficult to completely extinguish the heat extinguishing material of the present invention by heating. Even if the structure having two or more repeating units represented by the general formula (2) is a gel-like resin having no crosslinking point and crosslinked by another structure, the polyoxy When an alkylene structure exists, it can be used for the heat extinguishing material of the present invention. Furthermore, the copolymer containing the polyoxyalkylene structure may be linked in a chain using a chain extender.

  The polyoxyalkylene structure is not particularly limited, and includes, for example, polymethylene glycol (polyacetal), polyethylene glycol, polypropylene glycol, polytrimethylene glycol, polytetramethylene glycol, polybutylene glycol, and a plurality of these segments Etc. Moreover, the polyurethane, polyester, polyamide, polyimide etc. which are obtained from this are mentioned. Examples of the structure include a (meth) acrylic polymer having a polyalkylene glycol segment in a graft chain and a vinyl polymer such as polystyrene. A combination of these structures may be used.

  The polyoxyalkylene structure has at least one polyalkylene glycol segment selected from at least a polyoxymethylene structure, a polyoxyethylene structure, a polyoxymethylethylene structure, a polyoxyethylethylene structure, and a polyoxybutylene structure. preferable.

  Moreover, it is although it does not specifically limit as content of the polyoxyalkylene structure in the said copolymer (A), 20-70 mass% is preferable, 30-65 mass% is more preferable, 35-60 mass% is further more preferable. .

  Although it does not specifically limit as a crosslinkable functional group which the said copolymer (A) has, For example, a hydrolysable silyl group, an isocyanate group, an epoxy group, an oxetanyl group, an acid anhydride group, a carboxyl group, a hydroxyl group, polymerizability An unsaturated hydrocarbon group etc. are mentioned. Among them, it is preferably at least one selected from a hydrolyzable silyl group, an isocyanate group, an epoxy group, an oxetanyl group, an acid anhydride group, a carboxyl group, a hydroxyl group, and a polymerizable unsaturated hydrocarbon group. It is more preferably at least one selected from a reactive silyl group, an epoxy group, and an oxetanyl group, and a hydrolyzable silyl group is more preferable. These crosslinkable functional groups may be used alone or in combination of two or more.

Various methods for obtaining the copolymer (A) can be considered, and examples thereof include the following methods. The method of use is selected depending on the usage and desired properties, but is not particularly limited as long as the copolymer (A) can be obtained.
In order to obtain the copolymer (A), for example, the compound of formula (C) having the structure of the monomer of formula 1, a copolymerizable functional group showing copolymerizability with the monomer of formula 1, and the formula 2, The copolymer (A) of the present invention can be obtained by copolymerizing a copolymerizable functional group showing copolymerizability with the monomer of Formula 1 and a compound (D) having a crosslinkable functional group.
As another example of obtaining the copolymer (A), for example, a compound having a structure of the monomer of formula 1 and a copolymerizable functional group showing copolymerizability with the monomer of formula 1 and the structure of formula 2 ( C), a chain transfer agent having a crosslinkable functional group, a polymerization initiator having a crosslinkable functional group, and a polymerization terminator having a crosslinkable functional group, and the copolymer (A) of the present invention. Can be obtained.

As another example of obtaining the copolymer (A), for example, a compound having a structure of the monomer of formula 1 and a copolymerizable functional group showing copolymerizability with the monomer of formula 1 and the structure of formula 2 ( C), a compound (D) having a crosslinkable functional group and a copolymerizable functional group that exhibits copolymerizability with the monomer of formula 1, a chain transfer agent having a crosslinkable functional group or a crosslinkable functional group The copolymer (A) of the present invention can be obtained by copolymerization in the presence of a polymerization initiator and a polymerization terminator having a crosslinkable functional group.
As another example of obtaining the copolymer (A), for example, a compound having a structure of the monomer of formula 1 and a copolymerizable functional group showing copolymerizability with the monomer of formula 1 and the structure of formula 2 ( C), obtained by copolymerizing a compound (E) having a functional group that forms a bond with a compound having a crosslinkable functional group and a copolymerizable functional group showing copolymerizability with the monomer of formula 1. The copolymer (A) of the present invention can be obtained by reacting the cross-linked functional group with a compound (F) having a cross-linkable functional group that forms a bond with the functional group derived from the compound (E). it can.

  As a method for obtaining the copolymer (A) or the polymer according to the above, a known method can be used. Examples of known methods include free radical polymerization, living radical polymerization, iniferter polymerization, anion polymerization, and living anion polymerization.

  In addition, the compound (C) which has the structure of the copolymerizable functional group which shows the copolymerizability with the monomer of Formula 1, and Formula 2 is illustrated below.

Moreover, as a compound (D) which has a copolymerizable functional group and a crosslinkable functional group which show the copolymerizability with the monomer of Formula 1, 3-methacryloyloxypropyl trimethoxysilane, 3-methacryloyloxypropyl Examples include dimethoxysilane, glycidyl methacrylate, and 3-methacryloyloxypropyl isocyanate.
As the compound (E), 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2-hydroxybutyl (meth) Acrylate, 5-hydroxypentyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 3-hydroxy-3-methylbutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, 2-[(meta ) Acryloyloxy] ethyl-2-hydroxyethyl-phthalic acid, 2-[(meth) acryloyloxy] ethyl-2-hydroxypropyl-phthalic acid, and the like.

  Examples of the compound (F) include 3- (trimethoxysilyl) propyl isocyanate and 3- (triethoxysilyl) propyl isocyanate maleic anhydride when the functional group of the compound (E) is a hydroxyl group. Moreover, when the functional group of a compound (E) is a carboxyl group, glycidyl (meth) acrylate, bisphenol A type epoxy resin, bisphenol F type epoxy resin, hydrogenated bisphenol A type epoxy resin, etc. are mentioned.

Although it does not specifically limit as a number average molecular weight of the said copolymer (A), The range of 500-5 million is preferable. When the number average molecular weight is lower than 500, the volatility becomes strong and it may be difficult to stably handle the heat extinguishing material of the present invention. On the other hand, if it exceeds 5 million, the cohesive force is excellent, but it may be difficult to quickly disappear due to the entanglement effect. In addition, if the number average molecular weight is in the range of 500 to 5,000, the heat extinguishing material of the present invention can maintain the shape of a paste having a viscosity of 1 to 5 million mPa · s at 20 ° C.
On the other hand, when the number average molecular weight exceeds 5,000, the viscosity becomes high, that is, the fluidity becomes low, and a solid form is formed at room temperature.
Specifically, the number average molecular weight is appropriately selected according to the intended use and usage form of the heat extinguishing material of the present invention.

Below, the crosslinking agent (B) contained in the heat extinction material of this invention is demonstrated.
As a crosslinking agent (B) contained in the crosslinkable resin composition of the invention, for example, it reacts with the crosslinkable functional group of the copolymer (A) and is itself incorporated into the structure of the crosslinked body. One having a function (hereinafter also referred to as a crosslinking agent (B1)) and one having a function as a catalyst for reacting the crosslinkable functional groups of the copolymer (A) (hereinafter referred to as a crosslinking agent (B2)) Also called).
Moreover, there exists a crosslinking agent (B3) which has an effect | action of both said crosslinking agent (B1) and crosslinking agent (B2).

Although it does not specifically limit as a crosslinking agent (B1), Specifically, the following are mentioned.
A crosslinking agent that crosslinks the copolymer (A) having the oxetanyl group, for example, a photocationic initiator or a thermal cation initiator that generates an acid by ultraviolet rays or visible light.

  Examples of the crosslinking agent for crosslinking the isocyanate group-containing copolymer (A) include a compound having a plurality of active hydrogens such as a compound having a plurality of hydroxyl groups and a compound having a plurality of amino groups. Examples of the compound having a plurality of hydroxyl groups include ethylene glycol, butylene glycol, glycerin, neopentyl glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, pentaerythritol, and polyester polyol. Examples of the compound having a plurality of amino groups include hexamethylene diamine, tetramethylene diamine, and α, ω-diaminopropylene glycol.

Although it does not specifically limit as a crosslinking agent (B2), Specifically, the following are mentioned.
Examples of the crosslinking agent that crosslinks the hydrolyzable silyl group include a photoreactive catalyst having a functional group represented by the following formula (3), a photocationic initiator that generates an acid by ultraviolet light or visible light, and an organometallic compound. Amine compounds, acidic phosphates, tetraalkylammonium halides (halides: fluoride, chloride, bromide, iodide), organic acids such as carboxyl groups, inorganic acids such as hydrochloric acid, sulfuric acid and nitric acid. Especially, the photoreactive catalyst which has a functional group represented by following formula (3) is suitable.

In the formula (3), m represents an integer of 2 to 5, Y (m) represents an atom of group IVB, VB or VIB of the periodic table, Z represents a hydrogen group, a hydrocarbon group, a mercapto group, amino Represents a group, a halogen group, an alkoxyl group, an alkylthio group, a carbonyloxy group or an oxo group.

The photoreaction catalyst having a functional group represented by the above formula (3) may have a plurality of different functional groups represented by the above formula (3).
Examples of the functional group represented by the general formula (3) include two carbonyl groups bonded to an atom represented by Y (m) selected from the group consisting of oxygen, sulfur, nitrogen, phosphorus and carbon. And a compound having a hydrocarbon group or an oxide group represented by Z according to the valence of the atom represented by Y (m).

  Examples of the hydrocarbon group include an aliphatic hydrocarbon group, an unsaturated aliphatic hydrocarbon group, and an aromatic hydrocarbon group. These hydrocarbon groups have a substituent such as an amino group, a hydroxyl group, an ether group, an epoxy group, a polymerizable unsaturated group, a urethane group, a urea group, an imide group, and an ester group as long as the object of the present invention is not impaired. You may do it. Further, different hydrocarbon groups may be used in combination.

  A cyclic compound may be sufficient as the photoreaction catalyst which has a functional group represented by the said General formula (3). Examples of such a cyclic compound include compounds having one or two or more of the same or different functional groups represented by the general formula (3) in the cyclic chain. Furthermore, a compound in which a plurality of the same or different cyclic compounds are bonded with an appropriate organic group, a bicyclic compound containing at least one or more of the same or different cyclic compounds as a unit, and the like can also be used. .

As the photoreaction catalyst having the functional group represented by the general formula (3), when the atom represented by Y (m) is an oxygen atom, for example, acetic anhydride, propionic anhydride, butyric acid Anhydride, isobutyric acid anhydride, valeric acid anhydride, 2-methylbutyric acid anhydride, trimethylacetic acid anhydride, hexanoic acid anhydride, heptanoic acid anhydride, decanoic acid anhydride, lauric acid anhydride, myristic acid anhydride, Palmitic anhydride, stearyl anhydride, docosanoic anhydride, crotonic anhydride, acrylic anhydride, methacrylic anhydride, oleic anhydride, linoleic anhydride, chloroacetic anhydride, iodoacetic anhydride, Dichloroacetic anhydride, trifluoroacetic anhydride, chlorodifluoroacetic anhydride, trichloroacetic anhydride, pentafluoropropionic anhydride, heptafluoro Tyric anhydride, succinic anhydride, methyl succinic anhydride, 2,2-dimethyl succinic anhydride, isobutyl succinic anhydride, 1,2-cyclohexanedicarboxylic anhydride, hexahydro-4-methylphthalic anhydride, Itaconic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, maleic anhydride, 2-methylmaleic anhydride, 2,3- Dimethylmaleic acid anhydride, 1-cyclopentene-1,2-dicarboxylic acid anhydride, glutaric acid anhydride, 1-naphthyl acetic acid anhydride, benzoic acid anhydride, phenylsuccinic acid anhydride, phenylmaleic acid anhydride, 2, 3-diphenylmaleic anhydride, phthalic anhydride, 4-methylphthalic anhydride, 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride 4,4 '-(hexafluoropropylidene) diphthalic anhydride, 1,2,4,5-benzenetetracarboxylic anhydride, 1,8-naphthalenedicarboxylic anhydride, 1,4,5,8 -Naphthalenetetracarboxylic acid anhydride and the like; As a copolymer of maleic acid anhydride and a compound having a radical polymerizable double bond, for example, maleic acid anhydride and (meth) acrylate copolymer, maleic acid anhydride and Examples include styrene copolymers and copolymers of maleic anhydride and vinyl ether. Among these, commercially available products include, for example, Adeka Hardner EH-700, Adeka Hardner EH-703, Adeka Hardner EH-705A manufactured by Asahi Denka Co., Ltd., Rikacid TH, Ricacid HT-1, Ricacid HH, manufactured by Shin Nippon Chemical Co., Ltd. RIKACID MH-700, RIKACID MH-700H, RIKACID MH, RIKACID SH, RIKARESIN TMEG; Hitachi Chemical's HN-5000, HN-2000; Yuka Shell Epoxy's EpiCure 134A, EpiCure YH306, EpiCure YH307, EpiCure YH308H A Sumicure MS manufactured by Sumitomo Chemical Co., Ltd.

As a photoreaction catalyst having a functional group represented by the general formula (3), when the atom represented by Y (m) is a nitrogen atom, for example, succinimide, N-methylsuccinimide, α , Α-dimethyl-β-methyl succinimide, α-methyl-α-propyl succinimide, maleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-tert-butylmaleimide, N-laurylmaleimide N-cyclohexylmaleimide, N-phenylmaleimide, N- (2-chlorophenyl) maleimide, N-benzylmaleimide, N- (1-pyrenyl) maleimide, 3-methyl-N-phenylmaleimide, N, N′-1, 2-phenylene dimaleimide, N, N′-1,3-phenylene dimaleimide, N, N′-1,4-phenylene dimale N, N ′-(4-methyl-1,3-phenylene) bismaleimide, 1,1 ′-(methylenedi-1,4-phenylene) bismaleimide, phthalimide, N-methylphthalimide, N-ethylphthalimide, N-propyl phthalimide, N-phenyl phthalimide, N-benzyl phthalimide, pyromellitic acid diimide and the like can be mentioned.

As the photoreaction catalyst having the functional group represented by the general formula (3), when the atom represented by Y (m) is a phosphorus atom, for example, bis (2,6-dimethoxybenzoyl) -2 , 4,4-trimethyl-pentylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, and the like.

As the photoreaction catalyst having the functional group represented by the general formula (3), when the atom represented by Y (m) is a carbon atom, for example, 2,4-pentanedione, 3-methyl- 2,4-pentanedione, 3-ethyl-2,4-pentanedione, 3-chloro-2,4-pentanedione, 1,1,1-trifluoro-2,4-pentanedione, 1,1,1 , 5,5,5-hexafluoro-2,4-pentanedione, 2,2,6,6-tetramethyl-3,5-heptanedione, 1-benzoylacetone, dibenzoylmethane, and other diketones; dimethylmalo Acid ester, diethyl malonate, dimethyl methyl malonate, polycarboxylic acid esters such as tetraethyl 1,1,2,2-ethanetetracarboxylic acid; methyl acetylacetonate, ethylacetylacetonate α- carbonyl such as methyl propionylacetate - acetic acid esters and the like.

  Among the photoreaction catalysts having the functional group represented by the general formula (3), diacylphosphine oxide or a derivative thereof is particularly preferably used because the residue after disappearance is extremely small.

  As a preferable usage-amount of the compounding quantity of the photoreaction catalyst which has a functional group represented by the said General formula (3), it is 0.01 with respect to 100 weight part of the said copolymer (A) which has a hydrolysable silyl group. Part by weight, the preferred upper limit is 30 parts by weight. When the amount is less than 0.01 parts by weight, the photoreactivity may not be exhibited. When the amount exceeds 30 parts by weight, the light transmittance of the composition containing the copolymer (A) having a hydrolyzable silyl group may be reduced. Even if light is irradiated, only the surface may be crosslinked and cured, and the deep part may not be crosslinked or cured. A more preferred lower limit is 0.1 parts by weight, and a more preferred upper limit is 20 parts by weight.

  Examples of the organometallic compound include dibutyltin dilaurate, dibutyltin oxide, dibutyltin diacetate, dibutyltin phthalate, bis (dibutyltin laurate) oxide, dibutyltin bisacetylacetonate, and dibutyltin bis (monoester maleate). And tin compounds such as tin octylate, dibutyltin octoate and dioctyltin oxide, and alkyloxytitanates such as tetra-n-butoxy titanate and tetraisopropoxy titanate.

  Examples of the crosslinking agent that crosslinks the copolymer (A) having a polymerizable unsaturated group include, for example, thermal radical initiators such as peroxides and azo compounds; photoradical initiators by ultraviolet rays and visible light; Examples include an initiator system formed by combining a photo radical initiator and a compound having a plurality of mercapto groups.

Examples of the thermal radical initiator include diisopropylbenzene hydroperoxide, 1,1,3,3-tetramethylbutyl hydroperoxide, cumene hydroperoxide, tert-hexyl hydroperoxide, tert-butyl hydroperoxide, and the like. Hydroperoxides, α, α′-bis (tert-butylperoxy-m-isopropyl) benzene, dicumyl peroxide, 2,5-dimethyl-2,5-bis (tert-butylperoxy) hexane, dialkyl peroxides such as tert-butyl cumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-bis (tert-butylperoxy) hexyne-3; ketone peroxides, Oxyketer , Organic peroxides such as diacyl peroxides, peroxydicarbonates, peroxyesters, or 2,2′-azobisisobutyronitrile, 1,1 ′-(cyclohexane-1-carbonitrile ), 2,2′-azobis (2-cyclopropylpropionitrile), 2,2′-azobis (2,4-dimethylvaleronitrile), and the like.

Examples of the photo radical initiator include 4- (2-hydroxyethoxy) phenyl (2-hydroxy-2-propyl) ketone, α-hydroxy-α, α'-dimethylacetophenone, methoxyacetophenone, and 2,2-dimethoxy. 2-acetophenone derivative compounds such as 2-phenylacetophenone; benzoin ether compounds such as benzoin ethyl ether and benzoin propyl ether; ketal derivative compounds such as benzyldimethyl ketal; halogenated ketones; acyl phosphine oxides; acyl phosphonates; Methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-N, N-dimethylamino-1- (4-morpholinophenyl) -1-butanone; Bis (2,4,6-trimethyl Benzoyl) -phenylphosphine oxide bis- (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide; bis (η5-cyclopentadienyl) -bis (pentafluorophenyl) -titanium, bis (Η5-Cyclopentadienyl) -bis [2,6-difluoro-3- (1H
-Pyrid-1-yl) phenyl] -titanium; anthracene, perylene, coronene, tetracene, benzanthracene, phenothiazine, flavin, acridine, ketocoumarin, thioxanthone derivatives, benzophenone, acetophenone, 2-chlorothioxanthone, 2,4-dimethyl Examples include thioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, isopropylthioxanthone and the like. These may be used alone or in combination of two or more.

  Examples of the cross-linking agent that cross-links the copolymer (A) having an epoxy group include, for example, a photocation initiator that generates an acid by ultraviolet light or visible light, a thermal cation initiator, an amine compound-based curing agent, and an amide-based curing agent. , Acid anhydride curing agents, mercapto curing agents, thermal latent curing agents such as ketimine and DICY, and photoamine generators having a carbamoyloxyimino group.

Examples of the photocation catalyst include iron-allene complex compounds, aromatic diazonium salts, aromatic iodonium salts, aromatic sulfonium salts, pyridinium salts, aluminum complexes / silanol salts, and trichloromethyltriazine derivatives. Among these, as anions of onium salts and pyridinium salts, for example, SbF ₆ ⁻ , PF ₆ ⁻ , AsF ₆ ⁻ ,
Examples thereof include BF ₄ ⁻ , tetrakis (pentafluoro) borate, trifluoromethane sulfonate, methane sulfonate, trifluoroacetate, acetate, sulfonate, tosylate, and nitrate. Among these photocationic catalysts that are commercially available, for example, Irgacure 261 (manufactured by Ciba Geigy), Optmer SP-150 (manufactured by Asahi Denka Kogyo), Optmer SP-151 (manufactured by Asahi Denka Kogyo), Optomer SP-170 (Asahi Denka Kogyo), Optomer SP-171 (Asahi Denka Kogyo), UVE-1014 (General Electronics), CD-1012 (Sartomer), Sun-Aid SI-60L (Sanshin) Chemical Industry Co., Ltd.), Sun Aid SI-80L (manufactured by Sanshin Chemical Industry Co., Ltd.), Sun Aid SI-100L (manufactured by Sanshin Chemical Industry Co., Ltd.), CI-2064 (manufactured by Nippon Soda Co., Ltd.), CI-2639 (manufactured by Nippon Soda Co., Ltd.) ), CI-2624 (Nippon Soda Co., Ltd.), CI-2481 (Nippon Soda Co., Ltd.), RHODORSIL PHOTOINITIATOR 2074 (manufactured by Rhone-Poulenc), UVI-6990 (manufactured by Union Carbide), BBI-103 (manufactured by Midori Chemical), MPI-103 (manufactured by Midori Chemical), TPS-103 (manufactured by Midori Chemical), MDS -103 (made by Midori Chemical), DTS-103 (made by Midori Chemical), NAT-103 (made by Midori Chemical), NDS-103 (made by Midori Chemical), etc. are mentioned. These photocationic catalysts may be used alone or in combination of two or more.

Examples of the thermal cation curing agent include ammonium salts having at least one alkyl group, sulfonium salts, iodonium salts, diazonium salts, boron trifluoride / triethylamine complexes, and the like. As counter anions of these salts, for example, SbF ₆ ⁻
, PF ₆ ⁻ , AsF ₆ ⁻ , BF ₄ ⁻ , tetrakis (pentafluoro) borate, trifluoromethanesulfonate, methanesulfonate, trifluoroacetate, acetate, sulfonate, tosylate, nitrate and the like.

  Examples of the photoamine generator include a compound having a carbamoyloxyimino group, a cobaltamine complex, carbamate-o-nitrobenzyl, o-acyloxime, and the like.

  Although it does not specifically limit as a crosslinking agent (B3), (alpha), omega-diamino polyoxypropylene etc. are mentioned.

In addition, by including a decomposition accelerator or a decomposition retarder in the heat extinguishing material of the present invention, the decomposition rate and decomposition temperature can be appropriately controlled according to the intended use and form of use.
Although it does not specifically limit as a decomposition accelerator, Heavy metal compounds, such as azo compounds, such as azodicarbonamide, iron sulfate, sodium nitrate, cobalt naphthenate; Carboxylic acids, such as oxalic acid, linolenic acid, ascorbic acid; Hydroquinone, peroxidation Products, tin oxide and the like.
The peroxide is not particularly limited, and may be an inorganic peroxide or an organic peroxide. Specific examples of the inorganic peroxide include potassium persulfate, sodium persulfate, ammonium persulfate, potassium perchlorate, sodium perchlorate, ammonium perchlorate, and potassium periodate.

Although it does not specifically limit as an organic peroxide, When storage stability is required for the heat extinction material of this invention, the thing whose 10-hour half-life temperature is 100 degreeC or more is suitable. Examples of the organic peroxide having a 10-hour half-life temperature of 100 ° C. or more include P-menthane hydroxy peroxide, diisopropylbenzene hydroxy peroxide, 1,1,3,3-tetramethylbutyl hydroxy peroxide, cumene hydroxyperoxide. Hydroxyl peroxides such as oxide, t-hexyl hydroxy peroxide, t-butyl hydroxy peroxide; dicumyl peroxide, α, α'-bis (t-butylperoxy-m-isopropylbenzene), 2,5-dimethyl -2,5-bis (t-butylperoxy) hexane, t-butylcumyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butylperoxy) hexyne- Dialkyl peroxides such as 3; , 1-bis (t-hexylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t-hexylperoxy) cyclohexane, 1,1-bis (t-butylperoxy) -3 , 3,5-trimethylcyclohexane, 1,1-bis (t-butylperoxy) cyclohexane, 1,1-bis (t-butylperoxy) cyclododecane, 2,2-bis (t-butylperoxy) butane Peroxyketals such as n-butyl 4,4-bis (t-butylperoxy) valerate, 2,2-bis (4,4-di-t-butylperoxycyclohexyl) propane; t-hexylperoxyisopropyl Monocarbonate, t-butylperoxymaleic acid, t-butylperoxy3,5,5-trimethylhexanoate, t-butylperoxy Laurate, 2,5-dimethyl-2,5-bis (m-toluylperoxy) hexane, t-butylperoxyisopropyl monocarbonate, t-hexylperoxybenzoate, 2,5-dimethyl-2,5-bis ( m-benzoylperoxy) peroxyesters such as hexane, t-butylperoxyacetate, t-butylperoxybenzoate, bis-t-butylperoxyisophthalate, t-butylperoxyallyl monocarbonate, and the like. it can.

The azo compound is not particularly limited. Specifically, azobisisobutyronitrile (AIBN), 2,2-azobis (4-methoxy-2,4-dimethylvaleronitrile), 2,2- Azobis (2-cyclopropylpropionitrile), 2,2-azobis (2-methylbutyronitrile), 1,1-azobis (cyclohexane-1-carbonitrile) and the like can be mentioned.
By containing the peroxide and the azo compound, it is possible to suppress the generation of carbide residues after heating and extinguishing the heat extinguishing material of the present invention. Among peroxides, organic peroxides are preferred because generation of ash residues can be suppressed.

Although it does not specifically limit as said decomposition retarder, A mercapto compound, an amine compound, organic tin, an organic boron, etc. are mentioned.
The mercapto compound is not particularly limited, and specific examples include propanethiol, butanethiol, pentanethiol, 1-octanethiol, dodecanethiol, cyclopentanethiol, cyclohexanethiol, 1,3-propanediol, and the like. it can.
The amine compound is not particularly limited, and specific examples include propylamine, butylamine, hexylamine, dodecylamine, isopropylamine, hexamethylenediamine, cyclohexylamine, benzylamine, aniline, methylaniline and the like. .
Although it does not specifically limit as said organic tin, Specifically, dimethyltin dilaurate, dibutyltin diurarate, dibutyltin dioctate, dibutyltin diacetate, dibutyltin bis (2,4-pentanedione), dilauryltin dilaurate, etc. are included. Can be mentioned.
Although it does not specifically limit as said organic boron, Specifically, a trimethyl borate, a tripropyl borate, a tributyl borate, a trimethoxyboroxine, a trimethylene borate etc. can be mentioned.

  In the heat extinguishing material of the present invention, the content of the decomposition accelerator and the decomposition retarder is not particularly limited, and is appropriately selected according to the intended use and form of use. It is preferable to contain 1-10 mass% with respect to a heat extinction material.

Moreover, the heat extinction material of this invention is provided with quick curability by containing 30 mass% or less of compounds which have a polymerizable unsaturated group.
Although it does not specifically limit as a polymerizable unsaturated group of the compound which has a polymerizable unsaturated group, For example, a styryl group, an acryloyl group, a methacryloyl group, a vinyl ester group, a vinyloxy group etc. can be mentioned.

  Although it does not specifically limit as a compound which has the said styryl group, For example, styrene, indene, alpha-methylstyrene, p-methylstyrene, p-chlorostyrene, p-chloromethylstyrene, p-methoxystyrene, p-tert-butoxy Examples thereof include styrene and divinylbenzene.

Examples of the compound having an acrylic group or a methacryloyl group include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, tert-butyl (meth) acrylate, cyclohexyl (meta ) Acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, isononyl (meth) acrylate, isomyristyl (meth) acrylate, stearyl (meth) acrylate, isobornyl (meth) acrylate, Benzyl (meth) acrylate, 2-butoxyethyl (meth) acrylate, 2-phenoxyethyl (meth) acrylate, glycidyl (meth) acrylate, tetrahydrofurfuryl (meth) ) Acrylate, hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, neopentyl glycol di (meth) Acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, epoxy acrylate, polyester acrylate, Urethane acrylate, 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 5-hydroxypentyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 3-hydroxy -3-methylbutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, pentaerythritol tri (meth) acrylate, 2-[(meth) acryloyloxy] ethyl-2-hydroxyethyl-phthalic acid, 2 -[(Meth) acryloyloxy] ethyl-2-hydroxypropyl-phthalic acid and the like.

  Examples of the compound having a vinyl ester group include vinyl acetate, vinyl propionate, vinyl butyrate, vinyl caproate, vinyl benzoate, and vinyl cinnamate.

  Examples of the compound having a vinyloxy group include n-propyl vinyl ether, n-butyl vinyl ether, isobutyl vinyl ether, tert-butyl vinyl ether, tert-amyl vinyl ether, cyclohexyl vinyl ether, 2-ethylhexyl vinyl ether, dodecyl vinyl ether, octadecyl vinyl ether, 2-chloro Ethyl vinyl ether, ethylene glycol butyl vinyl ether, triethylene glycol methyl vinyl ether, benzoic acid (4-vinyloxy) butyl, ethylene glycol divinyl ether, diethylene glycol divinyl ether, triethylene glycol divinyl ether, tetraethylene glycol divinyl ether, butane-1,4- Diol-divinyl ether, hexane-1,6-di -Divinyl ether, cyclohexane-1,4-dimethanol-divinyl ether, di (4-vinyloxy) butyl isophthalate, di (4-vinyloxy) butyl glutarate, di (4-vinyloxy) butyl trimethylolpropane succinate Trivinyl ether, 2-hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether, 6-hydroxyhexyl vinyl ether, cyclohexane-1,4-dimethanol-monovinyl ether, diethylene glycol monovinyl ether, 3-aminopropyl vinyl ether, 2- (N, N- Diethylamino) ethyl vinyl ether, urethane vinyl ether, polyester vinyl ether, and the like.

  The heat extinguishing material of the present invention may contain a liquid resin. By containing the liquid resin, the extinction start temperature of the heat extinguishing material of the present invention can be lowered, and can be rapidly extinguished at 200 ° C. or higher. The liquid resin is not particularly limited as long as it is a compound having a boiling point of 100 ° C. or more in consideration of maintaining the shape of the heat extinguishing material and the extinction temperature. For example, a polyethylene glycol oligomer, a polypropylene oligomer, a polytetramethylene glycol oligomer, Examples include dioctyl phthalate, dibutyl phthalate, and glycerin monooleate.

Further, the heat extinguishing material of the present invention includes titanium oxide, alumina, colloidal calcium carbonate, heavy calcium carbonate, barium carbonate, magnesium carbonate, silica, surface-treated silica, calcium silicate, anhydrous silicon, hydrous silicon, mica, surface treatment. Contains fillers such as mica, talc, clay, surface-treated talc, boron nitride, alumina nitride, carbon nitride, carbon black, white carbon, short glass fiber, glass beads, glass balloon, shirasu balloon, acrylic beads, polyethylene beads, etc. May be. By containing these, the cohesive force of the sheet or the cured product is improved. However, since these always become inorganic residues, the content should be kept to the minimum necessary.

Furthermore, the heat extinguishing material of the present invention may contain a silane coupling agent.
Examples of the silane coupling agent include vinyltrimethoxysilane, dimethyldimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, tetramethoxysilane, tetraethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, and 3-aminopropyl. Trimethoxysilane, 3-aminopropylmethyldimethoxysilane, 3-aminopropyltriethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyl Triethoxysilane, N, N′-bis- [3- (trimethoxysilyl) propyl] ethylenediamine, N, N′-bis- [3- (triethoxysilyl) propyl] ethylenediamine, N, N′-bis- [ 3- (Trimethoxy Silyl) propyl] hexaethylenediamine, N, N′-bis- [3- (triethoxysilyl) propyl] hexaethylenediamine, and the like.

The heat extinguishing material of the present invention may contain a titanium coupling agent.
Examples of the titanium coupling agent include isopropyl triisostearoyl titanate, isopropyl-n-dodecylbenzenesulfonyl titanate, isopropyl tris (dioctyl pyrophosphite) titanate, tetraisopropyl bis (dioctyl phosphite) titanate, tetraisopropyl bis (ditri). Decyl phosphite) titanate, tetra (2,2-diallyloxymethyl-1-butyl) bis (di-tridodecyl) phosphite titanate, bis (dioctyl pyrophosphate) oxyacetate titanate, bis (dioctyl pyrophosphate) ethylene titanate, isopropyl And tri (N-aminoethyl-aminoethyl) titanate.

  Furthermore, the heat extinguishing material of the present invention is a rosin, rosin ester, disproportionated rosin ester, hydrogenated rosin ester, polymerized rosin ester, terpene resin, terpene phenol resin for the purpose of increasing the adhesiveness. Further, it may contain tackifying resins such as aromatic modified terpene resin, C5 / C9 petroleum resin, hydrogenated petroleum resin, phenol resin, coumarone-indene resin, ketone resin, xylene resin.

  Further, the heat extinguishing material of the present invention may further contain an anti-sagging agent, an antioxidant, an anti-aging agent, an ultraviolet absorber, a solvent, a fragrance, a pigment, a dye, etc., depending on the application and usage. .

The shape of the heat extinguishing material of the present invention may be a paste or a solid at room temperature.
The viscosity of the heat extinguishing material of the present invention in the form of a paste at room temperature is not particularly limited as long as it is in the range of 1 to 5 million mPa · s at 20 ° C. , Etc., can be selected and prepared to a suitable viscosity.
For example, in order to uniformly form the paste-like heat extinguishing material of the present invention in a desired region by a spin coating method, a pulling method, a dipping method, etc., the viscosity at 20 ° C. is 1-100 mPa
-It is preferable that it is s.
In order to form the paste-like heat extinguishing material of the present invention in a desired region by a brush coating method or the like, the viscosity at 20 ° C. is preferably 500 to 100,000 mPa · s.
In order to form the paste-like heat extinguishing material of the present invention so as to form a desired pattern by a screen printing method or the like, the viscosity at 20 ° C. is preferably 20 to 1000 mPa · s.

In the case of paste at normal temperature, the heat extinguishing material of the present invention is obtained by partially crosslinking the contained copolymer (A) having a crosslinkable functional group by using a crosslinking agent. It can be made the form.
The heat extinguishing material of the present invention, which is in paste form at normal temperature, may be applied to a plate-like base material or the like, and may have a sheet shape reinforced by the base material or the like (also referred to as a heat extinguishing sheet).
For example, a heat resistant resin sheet such as a polyethylene terephthalate sheet or a polyimide sheet; a support type reinforced with a base material such as a metal film is used. Alternatively, the sheet shape may be maintained by impregnating a woven or non-woven fabric made of paper, plastic, glass or the like.

When it is solid at normal temperature, it may be in the form of a lump or a sheet.
The method for producing the heat extinguishing material of the present invention in the form of a sheet is not particularly limited. For example, a known method such as a solvent casting method, an extrusion coating method, a calendar method, or a UV coating polymerization method is used. Can do.

  As a method for producing the heat extinguishing material of the present invention in the form of a sheet by a solvent casting method, for example, a resin as a raw material is dissolved and dispersed in a solvent, if necessary, additives such as a crosslinking agent and a filler. And a method of casting the obtained solution on a release-treated film and drying and removing the solvent.

  As a method for producing the heat extinguishing material of the present invention in the form of a sheet by a hot melt coating method, for example, a resin as a raw material, and additives such as a crosslinking agent and a filler are mixed by heating and dispersed as necessary. And a hot melt coating method through a T-die or the like.

  As a method for producing the heat extinguishing material of the present invention in the form of a sheet by the UV coating polymerization method, for example, a raw material resin having a photocrosslinkable functional group, an initiator selected according to the crosslinkable functional group, or Examples include a method of irradiating light capable of activating the photoinitiator while coating a composition in which a crosslinking agent and, if necessary, various additives such as a filler are mixed.

  Examples of the lamp used for the light irradiation include a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp chemical lamp, a black light lamp, a microwave excitation mercury lamp, and a metal halide lamp. In this case, when the photocationic polymerization initiator includes light in a wavelength region that is exposed to light, the light can be appropriately cut and irradiated by a filter or the like.

  Further, when the heat extinguishing material of the present invention taking the form of a heat extinguishing sheet is produced by the UV coating polymerization method, a sensitizer may be added to the raw material composition in advance. Examples of the sensitizer include anthracene derivatives and thioxanthone derivatives.

  The method for producing the heat extinguishing material of the present invention in the form of a heat extinguishing sheet is selected depending on, for example, the raw material resin having a heat crosslinkable functional group and the crosslinkable functional group. Examples thereof include a method in which a composition obtained by mixing an initiator or a crosslinking agent and various additives such as a filler as necessary is heated while being applied to polymerize or crosslink. Examples of the heating method in this case include a hot plate, a heating press device, a drying oven, a heat gun, an infrared heating device, a dielectric heating device, an induction heating device, and an ultrasonic heating device. When a plurality of crosslinkable functional groups are used depending on the purpose, a plurality of production methods may be used in combination.

The heat extinguishing material of the present invention is crosslinked and cured by applying energy for crosslinking or the like to obtain a crosslinked cured product.
In order to crosslink and cure the heat extinguishing material of the present invention, thermal crosslinking by heat or photocrosslinking by light can be mentioned.
However, in the case of thermal crosslinking, care should be taken because the copolymer (A) in the heat extinguishing material of the present invention may decompose and disappear due to overheating. For these reasons, photocrosslinking is preferred for crosslinking and curing the heat extinguishing material of the present invention.

  When the heat extinguishing material of the present invention is crosslinked and cured by photocrosslinking, a method of irradiating light capable of activating the crosslinking reaction of the heat extinguishing material can be exemplified.

Examples of the lamp used for the light irradiation include a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp chemical lamp, a black light lamp, a microwave excitation mercury lamp, and a metal halide lamp. In this case, when the photocationic polymerization initiator includes light in a wavelength region that is exposed to light, the light can be appropriately cut and irradiated by a filter or the like.
In addition, when the heat extinguishing material of the present invention is crosslinked and cured by photocrosslinking, a sensitizer may be added to the heat extinguishing material. Examples of the sensitizer include anthracene derivatives and thioxanthone derivatives.

  In addition, when the heat extinguishing material of the present invention is crosslinked and cured by thermal crosslinking, a method, an apparatus, or the like for heating the heat extinguishing material can be exemplified. Examples of the heating method and apparatus in this case include a hot plate, a heating press apparatus, a drying oven, a heat gun, an infrared heating apparatus, a dielectric heating apparatus, an induction heating apparatus, and an ultrasonic heating apparatus.

The heat extinguishing material of the present invention or a cured product thereof is not particularly limited as long as 95% or more of the weight disappears within 10 minutes by heating to a predetermined temperature of 200 to 500 ° C. However, it is possible to select and prepare a decomposition temperature suitable for the purpose of use, usage form, and the like.
For example, by disappearing in a temperature atmosphere of 200 to 300 ° C., the optical component can be temporarily fixed in a semiconductor device mounting process using low-temperature solder, etc. Can be applied to.
Further, by disappearing in a temperature atmosphere of 300 to 400 ° C., it can be eliminated in a semiconductor device mounting process using lead-free solder, etc., so that it can be used for temporary fixing or applied to various applications. it can.
Furthermore, by extinguishing in a temperature atmosphere of 400 to 500 ° C., the present invention can be applied to a case where a porous thin film is formed on an aluminum wiring, and can be applied to various uses.

  Further, the heat extinguishing material of the present invention or a cured product thereof is under reduced pressure at a predetermined temperature of 200 to 400 ° C. in an atmosphere containing oxygen and at a predetermined temperature of 350 to 500 ° C. in an anaerobic atmosphere. Then, it disappears by heating each at a predetermined temperature of 200 to 500 ° C. within 5 minutes. By utilizing such a characteristic that the decomposition temperature range changes depending on the difference in the atmosphere at the time of heating, it can be appropriately used for various applications.

The heat extinguishing material of the present invention or a cured product thereof hardly decomposes at a temperature of 150 ° C. or less, and rapidly decomposes at a relatively low temperature range of 200 to 500 ° C., and most of the solid portion disappears. For this reason, by heating, it can be easily removed from the adherend or the like, and there is little thermal influence on the adherend or the like. The heat extinguishing material of the present invention is used, for example, as a temporary fixing material such as a binder for temporarily fixing glass fibers, and after use is heated to release the temporary fixing, or an interlayer film for laminated glass or a plasma display heat conduction It is used as an adhesive to fix sheet, wallpaper, track jail fixing, stone fixing, gypsum board, etc. so that it can be recovered without being damaged by heating during recycling, or interposed between the contacts A temperature sensor that is fixed and disappears at a predetermined temperature to close the contacts, a metal surface protection sheet, a coating material for rust prevention, a fixing paste and a fixing sheet for temporarily fixing a polished sample, a semiconductor chip It is used as an underfill used to reinforce substrates and substrates, and it can be removed by heating or laser ablation resist as necessary. Can or to a resist pattern formed by using the.

  The application of the heat extinguishing material according to the present invention is not limited to the above. This heat extinguishing material is suitably used as a masking agent for preventing contamination around the processed part when processing an object to be processed, for example. Such a masking agent is suitably used as a masking material that covers the periphery of the processed part when, for example, etching is performed on the electronic component substrate or the electronic component chip by laser processing or a through hole is formed.

  Conventionally, as such a masking material, a removable adhesive tape has been used. However, a masking material comprising a removable adhesive tape has to be peeled after processing. On the other hand, when the heat extinguishing material according to the present invention is used as a masking material, it can be easily removed by heating after processing. In addition, when the heat extinguishing material according to the present invention is configured to have translucency, even if a masking material is applied so as to cover the processed portion, it can be processed by a laser or the like. . Therefore, workability is improved because it is only necessary to apply the masking material to the region including the processed portion and its periphery. In addition, since the heat extinguishing material according to the present invention can be cast without a solvent, it can be easily applied to the surface of an object to be processed as a masking material.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

Reference Example 1: Preparation of copolymer (A1) In a 1 L separable flask equipped with a stirrer, a cooler, a thermometer and a nitrogen gas inlet, 50 g of lauryl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), polypropylene glycol monomethacrylate (Japan) Oily, Bremer PP-1000) 50g, 3-methacryloyloxypropyltrimethoxysilane (KBM-503 made by Shin-Etsu Chemical Co., Ltd.), 2g lauryl mercaptan (Wako Pure Chemical Industries, Ltd.) 2g and ethyl acetate 100g were added and mixed. did. After the dissolved oxygen was removed by bubbling the monomer mixed solution with nitrogen gas for 20 minutes, the inside of the separable flask system was replaced with nitrogen gas, and the temperature was raised until reflux was reached while stirring. After refluxing, a solution obtained by diluting 0.024 g of 1,1-di (t-hexylperoxy) -3,3,5-trimethylcyclohexane as a polymerization initiator with 1 g of ethyl acetate was added to the polymerization system. After 1 hour, a solution prepared by diluting 0.036 g of 1,1-di (t-hexylperoxy) -3,3,5-trimethylcyclohexane with 1 g of ethyl acetate was added. Further, 2, 3, and 4 hours after the start of polymerization, a solution prepared by diluting 0.048 g, 0.12 g, and 0.36 g of di (3,5,5-trimethylhexanoyl) peroxide with 1 g of ethyl acetate was added. Seven hours after the first polymerization initiator was charged, the polymerization was terminated by cooling to room temperature. An ethyl acetate solution of an alkoxysilyl group-containing copolymer (A1) having a number average molecular weight of about 10,000 (gel permeation chromatography, molecular weight in terms of polystyrene) was obtained.
Ethyl acetate was removed under reduced pressure using a rotary evaporator to obtain a liquid resin having a viscosity of 50,000 mPa · s.

Reference Example 2: Preparation of copolymer (A2) In a 1 L separable flask equipped with a stirrer, a cooler, a thermometer and a nitrogen gas inlet, 30 g of lauryl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), polypropylene glycol monomethacrylate (Japan) Oily, Bremmer PP-1000 (50 g), hydroxyethyl methacrylate (Wako Pure Chemical Industries, Ltd.) 3 g, lauryl mercaptan (Wako Pure Chemical Industries, Ltd.) 2 g and ethyl acetate 100 g were added and mixed. After the dissolved oxygen was removed by bubbling the monomer mixed solution with nitrogen gas for 20 minutes, the inside of the separable flask system was replaced with nitrogen gas, and the temperature was raised until reflux was reached while stirring. After refluxing, a solution obtained by diluting 0.024 g of 1,1-di (t-hexylperoxy) -3,3,5-trimethylcyclohexane as a polymerization initiator with 1 g of ethyl acetate was added to the polymerization system. After 1 hour, a solution prepared by diluting 0.036 g of 1,1-di (t-hexylperoxy) -3,3,5-trimethylcyclohexane with 1 g of ethyl acetate was added. Further, 2, 3, and 4 hours after the initiation of polymerization, a solution obtained by diluting 0.048 g, 0.12 g, and 0.36 g of di (3,5,5-trimethylhexanoyl) peroxide with 1 g of ethyl acetate was added. Seven hours after the first polymerization initiator was charged, 2 g of methacryloyloxyethyl isocyanate (manufactured by Showa Denko KK, Karenz MOI) was added, reacted for another 2 hours, and then cooled to room temperature to complete the polymerization. An ethyl acetate solution of a polymerizable unsaturated hydrocarbon group-containing copolymer having a number average molecular weight of about 10,000 (gel molecular weight as determined by gel permeation chromatography) was obtained.
Ethyl acetate was removed under reduced pressure using a rotary evaporator to obtain a liquid resin having a viscosity of 50,000 mPa · s.

Example 1:
In a 0.2 L beaker, 1 g of the above copolymer (A1), crosslinker (B) diacylphosphine oxide compound (Ciba Specialty Chemicals Co., Ltd., Irgacure 819) is homogenized using a stir bar under light shielding. And nitrogen was bubbled for 10 minutes to remove dissolved oxygen to obtain a heat extinguishing material (crosslinkable composition) of the present invention.
The obtained material (composition) was applied on an aluminum plate to a thickness of 100 μm. Using a high-pressure mercury lamp, the object to be coated having an ultraviolet ray of 365 nm was irradiated for 60 seconds while adjusting the illuminance so that the irradiation intensity became 10 mW / cm ² . After irradiation with ultraviolet rays, the film was cured at 80 ° C. for 30 minutes to obtain a crosslinked film of the heat extinguishing material (crosslinkable composition).

(Evaluation of extinction time when heated to 250 ° C and 400 ° C)
A sample obtained by cutting the obtained crosslinked film into 5 mm × 5 mm was placed on a hot plate set to a predetermined temperature. The time until the crosslinked film disappeared visually was measured. Further, the weight of the residue remaining on the aluminum plate after disappearance was measured, and the weight reduction rate due to heating was calculated. The results are shown below.

250 ℃ extinction time 60 seconds Weight reduction rate 98%
400 ℃ Extinction time 15 seconds Weight reduction rate 98%

Example 2:
In a 0.2 L beaker, 1 g of the above copolymer (A2), crosslinking agent (B) diacylphosphine oxide compound (manufactured by Ciba Specialty Chemicals Co., Ltd., Irgacure 819) is homogenized using a stir bar under light shielding. And nitrogen was bubbled for 10 minutes to remove dissolved oxygen to obtain a heat extinguishing material (crosslinkable composition) of the present invention.
The obtained material (composition) was made into a 100 μm coating film in the same manner as in Example 1, and irradiated with a high-pressure mercury lamp for 60 seconds so that the ultraviolet intensity at 356 nm was 10 mW / cm ^2. A film was obtained.

(Evaluation of extinction time when heated to 250 ° C and 400 ° C)
In the same manner as in Example 1, the obtained crosslinked film was measured for the disappearance time when heated to 250 ° C. and 400 ° C., and the weight of the residue remaining after the disappearance. The results are shown below.

250 ℃ extinction time 60 seconds Weight reduction rate 98%
400 ℃ Extinction time 15 seconds Weight reduction rate 98%

Reference Example 3: Preparation of copolymer (A3) In a 1 L separable flask equipped with a stirrer, a cooler, a thermometer and a nitrogen gas inlet, 80 g of iso-butyl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), polypropylene glycol monomethacrylate (Nippon oleaginous, Bremer PP-1000) 20g, 3-methacryloyloxypropyltrimethoxysilane (KBM-503 manufactured by Shin-Etsu Chemical Co., Ltd.), 2g lauryl mercaptan (manufactured by Wako Pure Chemical Industries, Ltd.) 2g and ethyl acetate 100g , Mixed. After the dissolved oxygen was removed by bubbling the monomer mixed solution with nitrogen gas for 20 minutes, the inside of the separable flask system was replaced with nitrogen gas, and the temperature was raised until reflux was reached while stirring. After refluxing, a solution obtained by diluting 0.024 g of 1,1-di (t-hexylperoxy) -3,3,5-trimethylcyclohexane as a polymerization initiator with 1 g of ethyl acetate was added to the polymerization system. After 1 hour, a solution prepared by diluting 0.036 g of 1,1-di (t-hexylperoxy) -3,3,5-trimethylcyclohexane with 1 g of ethyl acetate was added. Further, 2, 3, and 4 hours after the start of polymerization, a solution prepared by diluting 0.048 g, 0.12 g, and 0.36 g of di (3,5,5-trimethylhexanoyl) peroxide with 1 g of ethyl acetate was added. Seven hours after the first polymerization initiator was charged, the polymerization was terminated by cooling to room temperature. An ethyl acetate solution of an alkoxysilyl group-containing copolymer (A3) having a number average molecular weight of about 10,000 (by gel permeation chromatography, molecular weight in terms of polystyrene) was obtained.
Ethyl acetate was removed under reduced pressure using a rotary evaporator to obtain a resin (A3) that was solid at 25 ° C. and fluid at 100 ° C.

Example 3:
In a 0.2 L beaker, 1 g of the copolymer (A3), the crosslinking agent (B) diacylphosphine oxide compound (manufactured by Ciba Specialty Chemicals Co., Ltd., Irgacure 819) was heated to 100 ° C. under light shielding, Using a stir bar, the mixture was mixed until uniform to obtain a heat extinguishing material (crosslinkable composition) of the present invention.
While the obtained material (composition) is in a molten state, a 100 μm coating film is prepared and irradiated with a high-pressure mercury lamp for 60 seconds so that the ultraviolet intensity at 356 nm is 10 mW / cm ² .
A crosslinked film was obtained.

(Evaluation of extinction time when heated to 250 ° C and 400 ° C)
In the same manner as in Example 1, the obtained crosslinked film was measured for the disappearance time when heated to 250 ° C. and 400 ° C., and the weight of the residue remaining after the disappearance. The results are shown below.

250 ℃ extinction time 300 seconds weight loss rate 96%
400 ℃ Dissipation time 30 seconds Weight reduction rate 98%

Reference Example 4: Preparation of copolymer (A4) In a 1 L separable flask equipped with a stirrer, a cooler, a thermometer and a nitrogen gas inlet, 50 g of lauryl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), polypropylene glycol monomethacrylate (Japan) Oily, Bremmer PP-1000 (50 g), glycidyl methacrylate (Wako Pure Chemical Industries, Ltd.) 1 g, lauryl mercaptan (Wako Pure Chemical Industries, Ltd.) 2 g and ethyl acetate 100 g were added and mixed. After the dissolved oxygen was removed by bubbling the monomer mixed solution with nitrogen gas for 20 minutes, the inside of the separable flask system was replaced with nitrogen gas, and the temperature was raised until reflux was reached while stirring. After refluxing, a solution obtained by diluting 0.024 g of 1,1-di (t-hexylperoxy) -3,3,5-trimethylcyclohexane as a polymerization initiator with 1 g of ethyl acetate was added to the polymerization system. After 1 hour, 1,1-di (t-hexylperoxy) -3,3,5-
A solution obtained by diluting 0.036 g of trimethylcyclohexane with 1 g of ethyl acetate was added. Further, 2, 3, and 4 hours after the start of polymerization, a solution prepared by diluting 0.048 g, 0.12 g, and 0.36 g of di (3,5,5-trimethylhexanoyl) peroxide with 1 g of ethyl acetate was added. Seven hours after the first polymerization initiator was charged, the polymerization was terminated by cooling to room temperature. An ethyl acetate solution of an alkoxysilyl group-containing copolymer (A4) having a number average molecular weight of about 10,000 (gel permeation chromatography, molecular weight in terms of polystyrene) was obtained.
Ethyl acetate was removed under reduced pressure using a rotary evaporator to obtain a liquid resin having a viscosity of 50,000 mPa · s.

Example 4:
To 100 g of the copolymer (A4), 30 g of α, ω-diaminopropylene glycol (Jefamine D-230, manufactured by PTI Japan) was used as a crosslinking agent (B), and a stir bar was used in the dark. The resulting mixture was mixed until uniform, and nitrogen was bubbled for 10 minutes to remove dissolved oxygen to obtain a heat extinguishing material (crosslinkable composition) of the present invention.
The obtained material (composition) was made into a 100 μm coating film in the same manner as in Example 1, and irradiated with a high-pressure mercury lamp for 60 seconds so that the ultraviolet intensity at 356 nm was 10 mW / cm ^2. A film was obtained.

(Evaluation of extinction time when heated to 250 ° C and 400 ° C)
In the same manner as in Example 1, the obtained crosslinked film was measured for the disappearance time when heated to 250 ° C. and 400 ° C., and the weight of the residue remaining after the disappearance. The results are shown below.

250 ℃ extinction time 60 seconds Weight reduction rate 98%
400 ℃ Extinction time 15 seconds Weight reduction rate 98%

Claims (26)

It is obtained by polymerizing a polymerizable monomer represented by the following general formula (1) and another polymerizable monomer, and has at least a polyoxyalkylene structure at any one of a side chain, a terminal, and a main chain. And a cured product containing a copolymer (A) having a crosslinkable functional group at its side chain or terminal and a crosslinking agent (B), which is cured by crosslinking, is extinguished by heat. Extinction material.
(Wherein R1, R2, R3 and R4 each represent a functional group selected from hydrogen and an alkyl group, and R1, R2, R3 and R4 may be the same functional group or different functional groups. (In the case of an alkyl group, a functional group different from the alkyl group may be optionally substituted.)   2. The heat extinction according to claim 1, wherein the cured product obtained by crosslinking and curing has a property that 95% by mass or more of the total mass of the cured product disappears within 10 minutes in a temperature atmosphere of 200 to 500 ° C. Sex material.   The crosslinkable functional group is at least one selected from a hydrolyzable silyl group, an isocyanate group, an epoxy group, an oxetanyl group, an acid anhydride group, a carboxyl group, a hydroxyl group, and a polymerizable unsaturated hydrocarbon group. The heat-extinguishing material according to claim 1 or 2.   The heat extinguishing material according to any one of claims 1 to 3, wherein the copolymer (A) contains 20 to 70 mass% of a polyoxyalkylene structure.   The copolymer (A) is a copolymer of (meth) acrylic acid alkyl ester, (meth) acrylic acid ester having polyoxyalkylene as an ester residue, and (meth) acrylic acid ester having a crosslinkable functional group. The heat extinguishing material according to any one of claims 1 to 4, which is a polymerization.   6. The heat extinguishing material according to claim 5, wherein the homopolymer of the (meth) acrylic acid alkyl ester has a glass transition temperature (Tg) of 20 ° C. or lower.   The heat extinguishing material according to any one of claims 1 to 6, wherein the copolymer (A) has a number average molecular weight of 5,000 to 5,000,000.   The heat extinguishing material according to any one of claims 1 to 7, wherein the heat extinguishing material contains a decomposition accelerator.   9. The heat extinguishing material according to claim 8, wherein the decomposition accelerator is a peroxide.   9. The heat extinguishing material according to claim 8, wherein the decomposition accelerator is an azo compound.   9. The heat extinguishing material according to claim 8, wherein the decomposition accelerator is tin oxide.   The heat extinguishing material according to any one of claims 1 to 7, wherein the heat extinguishing material contains a decomposition retarder.   13. The heat extinguishing material according to claim 12, wherein the decomposition retarder is any one of a mercapto compound, an amine compound, organic tin, and organic boron.   The heat extinguishing material according to any one of claims 1 to 7, wherein the heat extinguishing material contains 30% by mass or less of a compound having a polymerizable unsaturated group.   The heat extinguishing material according to any one of claims 1 to 14, wherein the heat extinguishing material has a viscosity at 20 ° C of 1 to 5 million mPa · s. The heat extinguishing material according to claim 15, wherein the viscosity at 20 ° C is 1 to 100 mPa · s. The heat extinguishing material according to claim 15, wherein the viscosity at 20 ° C is 500 to 100,000 mPa · s. The heat extinguishing material according to claim 15, wherein the viscosity at 20 ° C is 20 to 1000 mPa · s. The co-polymer (A), heated extinguishing material according to claim 7, wherein the number-average molecular weight is a number average molecular weight of 5,000 to 5,000,000.   The heat extinguishing material according to claim 1, wherein the cured product is extinguished by heating to a predetermined temperature of 200 to 400 ° C. in an atmosphere containing oxygen.   The heat extinguishing material according to claim 1, wherein the cured product is extinguished by heating to a predetermined temperature of 350 to 500 ° C. in an anaerobic atmosphere.   The heat extinguishing material according to claim 1, wherein the cured product disappears by heating to a predetermined temperature of 200 to 500 ° C. within 5 minutes or less under reduced pressure.   The heat extinguishing material according to claim 1, wherein the cured product disappears in a temperature atmosphere of 200 to 300 ° C.   The heat extinguishing material according to claim 1, wherein the cured product disappears in a temperature atmosphere of 300 to 400 ° C. The heat extinguishing material according to claim 1, wherein the cured product disappears in a temperature atmosphere of 400 to 500 ° C.   26. A heat extinguishing material, wherein the heat extinguishing material according to claim 1 is a cured product obtained by crosslinking and curing.