WO2010147011A1 - ポリクロロプレン及びその製造方法並びに接着剤 - Google Patents
ポリクロロプレン及びその製造方法並びに接着剤 Download PDFInfo
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- WO2010147011A1 WO2010147011A1 PCT/JP2010/059591 JP2010059591W WO2010147011A1 WO 2010147011 A1 WO2010147011 A1 WO 2010147011A1 JP 2010059591 W JP2010059591 W JP 2010059591W WO 2010147011 A1 WO2010147011 A1 WO 2010147011A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F36/14—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen
- C08F36/16—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen containing halogen
- C08F36/18—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen containing halogen containing chlorine
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J111/00—Adhesives based on homopolymers or copolymers of chloroprene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/14—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen
- C08F236/16—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen containing halogen
- C08F236/18—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen containing halogen containing chlorine
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L11/00—Compositions of homopolymers or copolymers of chloroprene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2438/00—Living radical polymerisation
- C08F2438/03—Use of a di- or tri-thiocarbonylthio compound, e.g. di- or tri-thioester, di- or tri-thiocarbamate, or a xanthate as chain transfer agent, e.g . Reversible Addition Fragmentation chain Transfer [RAFT] or Macromolecular Design via Interchange of Xanthates [MADIX]
Definitions
- the present invention relates to polychloroprene, a method for producing the same, and an adhesive using polychloroprene.
- polychloroprene used in automobile boots, belts, hoses and vibration-proof rubbers is obtained by radical emulsion polymerization.
- the molecular weight of polychloroprene has been adjusted by varying the amount of chain transfer agent used such as mercaptans and xanthogen disulfides, or by peptizing polysulfide bonds in chloroprene polymers polymerized in the presence of sulfur. ing.
- the method of adjusting the molecular weight by changing the amount of the chain transfer agent used or by peptizing the polysulfide bond has a limit in the primary structure control of the polymer, and the ratio of the weight average molecular weight Mw to the number average molecular weight Mn (molecular weight distribution; Mw / Mn,) was difficult to control below 2.0.
- Mw / Mn molecular weight distribution
- a method for producing polychloroprene using a dithiocarboxylic acid ester, a dithiocarbamic acid ester, or a xanthogenic acid ester as described in Patent Documents 1 to 5 as a radical polymerization regulator has a molecular weight distribution (Mw / Mn).
- Mw / Mn molecular weight distribution
- the polymer may gel, making it difficult to dissolve in an organic solvent such as toluene, or depositing polymer on the inner wall of the polymerization reactor or the stirring blade. There is a point.
- the main object of the present invention is to provide a polychloroprene having a narrow molecular weight distribution, a production method thereof, and an adhesive.
- the polychloroprene according to the present invention is obtained by radical polymerization of chloroprene alone or a monomer copolymerizable with chloroprene and chloroprene in the presence of a dithiocarbamate compound represented by the following chemical formula (A). is there.
- Z in the chemical formula (1) has at least one nitrogen atom, and the substituted or unsubstituted heterocyclic ring in which this nitrogen atom is bonded to the —CS 2 —R group in the chemical formula (1) It is a group represented by the formula group or the following chemical formula (2), and R is a group represented by the following chemical formula (3).
- a and B in the chemical formula (2) are independently of each other hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkoxy, substituted or unsubstituted acyl, substituted or Unsubstituted aroyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkylsulfonyl, substituted or unsubstituted alkylsulfinyl, substituted or unsubstituted alkylphosphonyl, substituted or unsubstituted A group selected from the group consisting of arylsulfinyl and substituted or unsubstituted arylphosphonyl.
- R 1 represents hydrogen or an alkyl group
- R 2 represents hydrogen, an alkyl group, a phenyl group, a substituted phenyl group, a cyano group, or an ester group
- R 3 represents a phenyl group or a substituted phenyl group. Represents a cyano group or an ester group.
- the monomers copolymerizable with chloroprene are, for example, 2,3-dichloro-1,3-butadiene, 1,3-butadiene, styrene, (meth) acrylic acid, (meth) acrylic acid It is at least one selected from the group consisting of esters and isoprene.
- the radical polymerization is, for example, suspension polymerization or emulsion polymerization. Further, it may be obtained by emulsion polymerization using an anionic emulsifier or a nonionic emulsifier.
- chloroprene alone or a monomer copolymerizable with chloroprene and chloroprene is radically polymerized in the presence of the dithiocarbamate compound represented by the chemical formula (1).
- the polychloroprene production method is selected from the group consisting of chloroprene and 2,3-dichloro-1,3-butadiene, 1,3-butadiene, styrene, (meth) acrylic acid, (meth) acrylic acid ester and isoprene.
- the at least one monomer may be polymerized. Further, suspension polymerization or emulsion polymerization may be performed. Furthermore, in the case of emulsion polymerization, an anionic emulsifier or a nonionic emulsifier can be used. Furthermore, a pH adjusting agent may be added to adjust the pH during polymerization to 4.0 to 11.0.
- the adhesive according to the present invention uses the aforementioned polychloroprene.
- chloroprene is radically polymerized in the presence of a dithiocarbamate compound having a specific structure, polychloroprene having a narrow molecular weight distribution can be obtained.
- the polychloroprene according to the embodiment of the present invention is a chloroprene homopolymer or a copolymer of chloroprene and a monomer copolymerizable with the chloroprene. Specifically, in the presence of a dithiocarbamate compound represented by the following chemical formula (4), a chloroprene monomer alone, or a chloroprene monomer and a monomer copolymerizable with the chloroprene monomer are converted to radicals. It was obtained by polymerization.
- Z in the chemical formula (4) has at least one nitrogen atom, and the substituted or unsubstituted heterogeneous group in which this nitrogen atom is bonded to the —CS 2 —R group in the chemical formula (4).
- R in the chemical formula (4) is a group represented by the following chemical formula (6).
- a and B in the chemical formula (5) are independently of each other hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkoxy, substituted or unsubstituted acyl, substituted Or unsubstituted aroyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkylsulfonyl, substituted or unsubstituted alkylsulfinyl, substituted or unsubstituted alkylphosphonyl, substituted or unsubstituted A group selected from the group consisting of arylsulfinyl and substituted or unsubstituted arylphosphonyl.
- R 1 represents hydrogen or an alkyl group
- R 2 represents hydrogen, an alkyl group, a phenyl group, a substituted phenyl group, a cyano group, or an ester group
- R 3 represents a phenyl group or a substituted phenyl group.
- the dithiocarbamate compound is added to adjust the molecular weight distribution of the resulting polychloroprene to a narrow range. And in the polychloroprene of this embodiment, if the influence on raw material cost and superposition
- R in the chemical formula (4) is a group represented by the chemical formula (6) in which the radical species is relatively stable, and in particular, benzyl group, 1-phenylethyl group, cumyl group, 1,1-diphenyl.
- dithiocarbamate compounds examples include benzyldithiobenzoate, cumyldithiobenzoate, benzylpyrrolecarbodithioate, 1-phenylethylpyrrolecarbodithioate, cumylpyrrolecarbodithioate, 1,1-diphenylmethyl.
- Pyrrole carbodithioate 1-methoxycarbonyl-1-methylmethylpyrrole carbodithioate, 1-methoxycarbonyl-1-methylethylpyrrole carbodithioate, benzylimidazole carbodithioate, 1-phenylethylimidazole carbodithioate, cumyl Imidazolecarbodithioate, 1,1-diphenylmethylimidazolecarbodithioate, 1-methoxycarbonyl-1-methylmethylimidazolecarbodithio Ito, 1-methoxycarbonyl-1-methylethyl imidazolecarboxylate dithio Eight and the like.
- the amount of the dithiocarbamate compound added is not particularly limited, but is preferably 0.005 to 5.00 parts by mass per 100 parts by mass of the total amount of monomers to be polymerized, and 0.05 to 1.
- the range of 00 parts by mass is more preferable.
- Chloroprene is 2-chloro-1,3 butadiene.
- Examples of the monomer copolymerizable with chloroprene include 1 such as 2,3-dichloro-1,3-butadiene, 2-cyano-1,3-butadiene, 1-chloro-1,3-butadiene and the like.
- 1,3-butadiene, styrene, methyl methacrylate, methacrylic acid, glycidyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl methacrylate, ⁇ -cyanoethyl acrylate, and isoprene are preferred.
- the polychloroprene of this embodiment can be obtained by radical polymerization of the above-described monomer in the presence of a dithiocarbamate compound.
- Radical polymerization is a method in which a radical is generated in a polymerization system by a radical initiator, heat or radiation, and the monomer is polymerized by a radical mechanism.
- a molecular weight regulator such as a monomer and a chain transfer agent is dissolved, dispersed or emulsified in a medium such as an organic solvent or water, and a radical initiator such as a peroxide or an azo compound is added.
- Polymerization is performed for several hours to several tens of hours at a temperature of from room temperature to about 100 ° C. depending on the polymerizability of the body.
- radical initiator for example, benzoyl peroxide, lauroyl peroxide, t-butyl hydroperoxide, paramentane hydroperoxide, dicumyl peroxide, potassium persulfate, Peroxide compounds such as ammonium sulfate, 2,2′-azobis (4-methoxy-2,4-dimethylvaleronitrile), 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis ( 2-methylpropionitrile), 2,2′-azobis (2-methylbutyronitrile), 1,1′-azobis (cyclohexane-1-carbonitrile), 1-[(1-cyano-1-methylethyl) Azo] formamide, dimethyl 2,2′-azobis (2-methylpro) Onate), 4,4′-azobis (4-cyanovaleric acid), 2,2′-azobis (2,4,4-trimethylpentane), 2,
- the amount of the radical initiator is preferably as less as the number of moles charged of the dithiocarbamate compound. As a result, a polymer having a narrower molecular weight distribution is obtained.
- radical polymerization in an aqueous medium.
- an emulsion polymerization method in which a monomer and a molecular weight modifier are emulsified in water using an appropriate emulsifier and polymerized in an emulsifier micelle by adding a radical initiator, a small amount of emulsifier or dispersion.
- mini-emulsion polymerization and suspension polymerization in which a monomer, a molecular weight regulator and a radical initiator are dispersed in water using an agent and polymerized in monomer droplets.
- an anionic emulsifier that becomes an anion when the hydrophilic portion is dissociated in water, or a nonionic emulsifier whose hydrophilic portion is non-electrolyte is preferable.
- the amount of emulsifier and dispersant added is preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of chloroprene.
- anionic emulsifier for example, rosin acid salt, fatty acid salt, alkyl sulfate salt, alkylbenzene sulfonate salt, alkyl phosphate salt and the like can be used.
- nonionic emulsifiers include polyoxyethylene derivatives such as polyoxyalkylene alkyl ether, polyoxyalkylene alkyl allyl ether, polyoxyalkylene sorbitan ether, polyoxyethylene castor oil ether, sorbitan monostearate, sorbitan monolaurate.
- Sorbitan fatty acid esters such as sorbitan monopalmitate, glycerol fatty acid esters such as glycerol monostearate and glycerol monooleate, aliphatic alkanolamines, polyoxyethylene distyryl phenyl ether, polyoxyethylene tristyryl phenyl ether Polyoxyethylene naphthyl ether, polyoxyethylene hydroxy naphthyl ether, and the like can be used.
- a pH adjuster is added to adjust the pH during polymerization to 4.0 to 11. 0.0 is desirable.
- the pH adjuster used in this case include hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, oxalic acid, malic acid, citric acid, amino acids and other acids, sodium hydroxide, potassium hydroxide, ammonia, diethylamine, triethylamine, Examples include bases such as diethanolamine and triethanolamine.
- amphoteric electrolytes such as amino acids is also possible.
- a weak acid means a substance having a pKa of 2 or more (for example, phosphoric acid, formic acid, acetic acid, malic acid, citric acid, etc.)
- a weak base means a substance having a pKb of 2 or more (for example, ammonia, And diethylamine, triethylamine, diethanolamine, and triethanolamine).
- the acid dissociation constant Ka is the equilibrium constant of the ionization equilibrium of the acid in the ionized aqueous solution, and the stronger the acid, the larger the value.
- pKa is the negative common logarithm of Ka, and the stronger the acid, the smaller.
- pKb is a negative common logarithm of the base dissociation constant Kb in the ionized aqueous solution. The stronger the base, the smaller the pKb.
- a combination of two or more kinds of pH adjusting agents may be used.
- the polymerization temperature is not particularly limited, and can be carried out in the range of 0 to 80 ° C., preferably in the range of 10 to 50 ° C.
- the polymerization end time is not particularly limited, it is preferable to carry out the polymerization until the monomer conversion rate is 60 to 100% in order to obtain productivity and good adhesive properties.
- the polymerization terminator used at that time is not particularly limited as long as it is a commonly used terminator, and for example, phenothiazine, 2,6-tert-butyl-4-methylphenol, hydroxylamine and the like can be used. .
- one or more of the above-mentioned emulsifying / dispersing agents may be added to the polymerization solution during and after the polymerization.
- radical polymerization is performed in the presence of a dithiocarbamate compound having a specific structure, polychloroprene having a narrow molecular weight distribution can be obtained with easy polymerization control.
- the polychloroprene of this embodiment can be used alone as an adhesive, but the adhesive properties are improved by adding a tackifier resin or a crosslinking agent. And since the adhesive using the polychloroprene of this embodiment uses the polymer with narrow molecular weight distribution, heat resistance is improving compared with the conventional product. This is because low molecular weight polymers having poor heat resistance are reduced.
- apparatus HLC-8120GPC (manufactured by Tosoh Corporation), pre-column: TSK guard column HHR-H, analytical column: HSKgelGMHHR-H, sample pump pressure: 8.0 to 9.5 MPa, sample adjustment concentration 0.1 mass %.
- the above results are shown in Tables 1 and 2 below.
- the regulators shown in Tables 1 and 2 are respectively: a: benzylpyrrole carbodithioate represented by the following chemical formula (7), and b: 1-phenylethylimidazole carbodithioate represented by the following chemical formula (8).
- C 3-chloro-2-butenylpyrrolecarbodithioate represented by the following chemical formula (9)
- d benzyldithiobenzoate represented by the following chemical formula (10)
- e represented by the following chemical formula (11) Dodecyl mercaptan.
Abstract
Description
また、ラジカル重合は、例えば懸濁重合又は乳化重合である。
更に、アニオン乳化剤又はノニオン乳化剤を用いて乳化重合して得たものでもよい。
このポリクロロプレンの製造方法では、クロロプレンと、2,3-ジクロロ-1,3-ブタジエン、1,3-ブタジエン、スチレン、(メタ)アクリル酸、(メタ)アクリル酸エステル及びイソプレンからなる群より選択される少なくとも一種の単量体とを重合してもよい。
また、懸濁重合又は乳化重合を行ってもよい。
更に、乳化重合の場合は、アニオン乳化剤又はノニオン乳化剤を用いることができる。
更にまた、pH調節剤を加えて重合中のpHを4.0~11.0に調整してもよい。
ジチオカルバミン酸エステル化合物は、得られるポリクロロプレンの分子量分布を狭い範囲に調整するために添加するものである。そして、本実施形態のポリクロロプレンにおいては、原料コスト及び重合制御性への影響を考慮すると、上記化学式(4)におけるZがピロール、インドール、カルバゾール及びイミダゾールのいずれかであるジチオカルバミン酸エステル化合物を用いることが好ましい。これにより、製造コストを増加させずに、重合制御性を向上させることができる。
クロロプレンとは、2-クロロ-1,3,ブタジエンである。また、クロロプレンと共重合可能な単量体とは、例えば、2,3-ジクロロ-1,3-ブタジエン、2-シアノ-1,3-ブタジエン、1-クロロ-1,3-ブタジエン等の1,3-ブタジエン類、スチレン、α-メチルスチレン、p-クロロメチルスチレン、p-シアノスチレン、p-アセトキシスチレン、塩化p-スチレンスルホニル、エチルp-スチレンスルホニル、p-ブトキシスチレン、4-ビニル安息香酸、3-イソプロペニル-α,α’-ジメチルベンジルイソシアネート等のスチレン類、メタクリル酸メチル、メタクリル酸グリシジル、メタクリル酸2-ヒドロキシエチル、メタクリル酸2-ヒドロキシプロピル、メタクリル酸4-ヒドロキシブチル、メタクリル酸2-(ジメチルアミノ)エチル、メタクリル酸2-(ジエチルアミノ)エチル、メタクリル酸3-(ジメチルアミノ)プロピル、メタクリル酸2-(イソシアナート)エチル、メタクリル酸2,4,6-トリブロモフェニル、メタクリル酸2,2,3,3-テトラフロロプロピル、メタクリル酸2,2,2-トリフロロエチル、メタクリル酸2,2,3,3,3-ペンタフロロプロピル、メタクリル酸2,2,3,4,4,4-ヘキサフロロブチル等のメタクリル酸エステル類、アクリル酸ブチル、アクリル酸エチル、アクリル酸2-エチルヘキシル、アクリル酸2-エトキシエチル、アクリル酸2-ブトキシエチル、アクリル酸シクロヘキシル、アクリル酸3-(トリメトキシシリル)プロピル、アクリル酸2,2,3,3-テトラフロロプロピル、アクリル酸2,2,2-トリフロロエチル、アクリル酸2,2,3,3,3-ペンタフロロプロピル、アクリル酸2,2,3,4,4,4-ヘキサフロロブチル等のアクリル酸エステル類、その他、アクリロニトリル、メタクリロニトリル、α-シアノエチルアクリレート、無水マレイン酸、メタクリル酸、アクリル酸、アクロレイン、ジアセトンアクリルアミド、ビニルメチルケトン、ビニルエチルケトン、ジアセトンメタクリレート、イソプレン等があり、これらを単独もしくは2種類以上を併用してもよい。
ラジカル重合とは、ラジカル開始剤、熱又は放射線等によって重合系内にラジカルを発生させ、単量体をラジカル機構で重合する方法である。一般的には、有機溶剤、水等の媒体に単量体及び連鎖移動剤等の分子量調節剤を溶解、分散又は乳化させ、過酸化物、アゾ化合物等のラジカル開始剤を添加し、単量体の重合性等に応じて、常温以下から100℃程度の温度で数時間から数十時間重合するものである。
300mLガラス容器内に、水:200質量部、ポリオキシエチレン多環フェニルエーテル:20質量部、ナフタレンスルホン酸ホルマリン縮合物ナトリウム塩:0.5質量部、リン酸ナトリウム塩:1.5質量部を入れ溶解し、その中にクロロプレン単量体:100質量と調節剤を加えて40℃に加熱し、過硫酸カリウムを添加して重合を行った。そして、モノマー変換率が60%になった時点で、ヒドロキシルアミンの添加により、反応を停止させ、残りのモノマーを留去することでラテックスを得た。その後、ラテックスを凍結乾燥させて得られた実施例1~3及び比較例1~4のゴムを、GPC(ゲルパーミエーションクロマトグラフィー)により測定した。
300mLガラス容器内に、水:200質量部、ポリオキシエチレン多環フェニルエーテル:20質量部、ナフタレンスルホン酸ホルマリン縮合物ナトリウム塩:0.5質量部、リン酸ナトリウム塩:1.5質量部を入れ溶解し、その中にクロロプレン単量体:100質量とイソプレン:20質量部と調節剤を加えて40℃に加熱し、過硫酸カリウムを添加して重合を行った。そして、モノマー変換率が60%になった時点で、ヒドロキシルアミンの添加により、反応を停止させ、残りのモノマーを留去することでラテックスを得た。その後、ラテックスを凍結乾燥させて得られた実施例4~6及び比較例5,6のゴムを、GPCにより測定した。
pHは、pHメータ(堀場製作所社製)により測定した。
重合体の数平均分子量Mn、質量平均分子量Mw、及び分子量分布(Mw/Mn)は、GPC(標準ポリスチレン換算)で測定した。その際、装置:HLC-8120GPC(東ソー株式会社製)、プレカラム:TSKガードカラムHHR-H、分析カラム:HSKgelGMHHR-H、サンプルポンプ圧:8.0~9.5MPa、サンプル調整濃度0.1質量%で測定した。
Claims (10)
- クロロプレンと共重合可能な単量体が、2,3-ジクロロ-1,3-ブタジエン、1,3-ブタジエン、スチレン、(メタ)アクリル酸、(メタ)アクリル酸エステル及びイソプレンからなる群より選択される少なくとも一種であることを特徴とする請求項1に記載のポリクロロプレン。
- ラジカル重合が、懸濁重合又は乳化重合であることを特徴とする請求項1又は2に記載のポリクロロプレン。
- アニオン乳化剤又はノニオン乳化剤を用いて乳化重合して得たものであることを特徴とする請求項3に記載のポリクロロプレン。
- クロロプレンと、2,3-ジクロロ-1,3-ブタジエン、1,3-ブタジエン、スチレン、(メタ)アクリル酸、(メタ)アクリル酸エステル及びイソプレンからなる群より選択される少なくとも一種の単量体とを重合することを特徴とする請求項5に記載のポリクロロプレンの製造方法。
- 懸濁重合又は乳化重合することを特徴とする請求項5又は6に記載のポリクロロプレンの製造方法。
- アニオン乳化剤又はノニオン乳化剤を用いて乳化重合することを特徴とする請求項7に記載のポリクロロプレンの製造方法。
- pH調節剤を加えて重合中のpHを4.0~11.0に調整することを特徴とする請求項5乃至8のいずれか1項に記載のポリクロロプレンの製造方法。
- 請求項1乃至4のいずれか1項に記載のポリクロロプレンを用いた接着剤。
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JP2011519729A JPWO2010147011A1 (ja) | 2009-06-16 | 2010-06-07 | ポリクロロプレン及びその製造方法並びに接着剤 |
EP10789386.9A EP2444427A4 (en) | 2009-06-16 | 2010-06-07 | POLYCHLOROPRENE, METHOD OF MANUFACTURING THEREOF AND LIABILITY CONTAINING THEREOF |
US13/378,023 US20120130008A1 (en) | 2009-06-16 | 2010-06-07 | Polychloroprene, process for production of same, and adhesives containing same |
CN2010800264512A CN102803303A (zh) | 2009-06-16 | 2010-06-07 | 聚氯丁二烯及其制造方法以及粘接剂 |
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US10344158B2 (en) | 2013-07-16 | 2019-07-09 | Skinprotect Corporation Sdn Bhd | Elastomeric film-forming compositions and articles made from the elastomeric film |
WO2018181801A1 (ja) * | 2017-03-30 | 2018-10-04 | デンカ株式会社 | ブロック共重合体及びブロック共重合体の製造方法 |
CN110945037B (zh) * | 2017-07-21 | 2022-11-11 | 电化株式会社 | 氯丁二烯系聚合物和其制造方法 |
JP7190433B2 (ja) | 2017-07-31 | 2022-12-15 | デンカ株式会社 | ブロック共重合体及びブロック共重合体の製造方法 |
US20220242987A1 (en) * | 2019-12-24 | 2022-08-04 | Showa Denko K.K. | Chloroprene copolymer latex composition and molded article of same |
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- 2010-06-07 KR KR1020117030609A patent/KR20120047861A/ko not_active Application Discontinuation
- 2010-06-07 US US13/378,023 patent/US20120130008A1/en not_active Abandoned
- 2010-06-07 JP JP2011519729A patent/JPWO2010147011A1/ja active Pending
- 2010-06-07 WO PCT/JP2010/059591 patent/WO2010147011A1/ja active Application Filing
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EP2444427A1 (en) | 2012-04-25 |
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US20120130008A1 (en) | 2012-05-24 |
CN102803303A (zh) | 2012-11-28 |
TW201114787A (en) | 2011-05-01 |
EP2444427A4 (en) | 2014-07-23 |
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