WO2022138808A1 - 樹脂組成物 - Google Patents
樹脂組成物 Download PDFInfo
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- WO2022138808A1 WO2022138808A1 PCT/JP2021/047832 JP2021047832W WO2022138808A1 WO 2022138808 A1 WO2022138808 A1 WO 2022138808A1 JP 2021047832 W JP2021047832 W JP 2021047832W WO 2022138808 A1 WO2022138808 A1 WO 2022138808A1
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- 229910052623 talc Inorganic materials 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000001757 thermogravimetry curve Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- PGQNYIRJCLTTOJ-UHFFFAOYSA-N trimethylsilyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)O[Si](C)(C)C PGQNYIRJCLTTOJ-UHFFFAOYSA-N 0.000 description 1
- 150000004072 triols Chemical class 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 150000003739 xylenols Chemical class 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- 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
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
Definitions
- the present invention relates to a resin composition.
- Thermosetting resin is used in various fields because it has various excellent properties such as high heat resistance and mechanical strength.
- thermosetting resins epoxy resins are used in a wide range of applications, for example, as matrix resins for electronic circuit encapsulants, paints, adhesives and fiber reinforced materials. Epoxy resins are excellent in heat resistance, chemical resistance, insulating properties, etc., but have a problem of insufficient impact resistance, which is a characteristic of thermosetting resins.
- a method of adding an elastomer to the thermosetting resin is widely used.
- the elastomer examples include polymer particles (for example, crosslinked polymer particles). It is easy to simply mix the polymer particles with a thermosetting resin (eg epoxy resin). As a mixing method, for example, some polymer particles having a particle size smaller than 1 ⁇ m are collected to prepare a powder or granular material of polymer particles having a particle size of 1 ⁇ m or more, and then the powder or granular material and a thermosetting resin are used. Can be mentioned as a method of mechanically mixing the particles. The powder or granular material of the polymer particle produced by collecting several polymer particles in this way is called a secondary particle, and the polymer particle itself having a particle diameter smaller than 1 ⁇ m before becoming a powder or granular material is called a primary particle.
- a secondary particle the polymer particle itself having a particle diameter smaller than 1 ⁇ m before becoming a powder or granular material is called a primary particle.
- thermosetting resin By the above-mentioned mixing method, it is possible to disperse the secondary particles of the polymer particles in the thermosetting resin. However, it is very difficult at the industrial level to disperse the primary particles of polymer particles having a particle size smaller than 1 ⁇ m in a thermosetting resin.
- Patent Document 1 describes an epoxy resin composition containing a core-shell polymer in which the shell layer contains a structural unit containing an alkoxy group or an aryloxy group.
- One aspect of the present invention has been made in view of the above problems, and an object thereof is to provide a resin composition having excellent handleability.
- the present inventor has completed the present invention as a result of diligent studies to solve the above problems.
- the resin composition according to the embodiment of the present invention contains the polymer particles (A) and the matrix resin (B), the polymer particles (A) have a graft portion, and the graft portion is (i).
- (Ia) Does not contain a structural unit containing an aromatic group, or (i-b) contains a structural unit containing an aromatic group in an amount of more than 0% by weight and 10% by weight or less in 100% by weight of the graft portion.
- a structural unit derived from an alkyl methacrylate and a structural unit derived from an alkyl acrylate (iii) a structural unit containing an alkoxy group, a structural unit containing an aryloxy group, a structural unit containing an oxetane group, and a hydroxyl group.
- the resin composition according to another embodiment of the present invention contains the polymer particles (A) and the matrix resin (B), the polymer particles (A) have a graft portion, and the graft portion is the said.
- the 100% by weight of the graft portion does not contain (i) (ia) a structural unit containing an aromatic group, or (i-b) contains a structural unit containing an aromatic group in an amount of more than 0% by weight and 10% by weight or less.
- It is a polymer having a total content of 50% by weight or more, and the glass transition temperature of the graft portion is ⁇ 25 ° C. or higher and 18 ° C.
- a resin composition containing a high concentration of polymer particles in the matrix resin may be required.
- a resin composition containing a high concentration of polymer particles is mixed with another matrix resin to obtain a resin composition having a low concentration of polymer particles.
- the resin composition containing a high concentration of polymer particles is used as a so-called "masterbatch”.
- a resin composition containing the polymer particles in a high concentration in the matrix resin may be required.
- An object according to an embodiment of the present invention is to provide a resin composition having excellent handleability, that is, having a low viscosity, even when the resin composition contains polymer particles in a high concentration.
- the present inventor has newly found that the above-mentioned problems can be achieved by using polymer particles having a graft portion having a low glass transition temperature, and has completed the present invention. ..
- the resin composition may further contain an inorganic filler in addition to the polymer particles.
- the functional groups contained in the polymer particles may react with the inorganic filler to increase the viscosity of the resin composition, resulting in poor handleability of the resin composition.
- An additional object according to an embodiment of the present invention is to provide a resin composition having excellent handleability, that is, a low viscosity, even when the resin composition contains polymer particles and an inorganic filler. Is.
- the resin composition according to the embodiment of the present invention is a resin composition containing the polymer particles (A) and the matrix resin (B).
- the polymer particles (A) have a graft portion.
- the graft portion is (I) (i) (ia) Does not contain a structural unit containing an aromatic group, or (i-b) 100% by weight of the graft portion contains more than 0% by weight of a structural unit containing an aromatic group. Including less than% by weight (Ii) Containing at least one of a structural unit derived from an alkyl methacrylate and a structural unit derived from an alkyl acrylate.
- a structural unit containing a carboxylic acid anhydride group a structural unit containing a cyclic ester group, a structural unit containing a cyclic amide group, a structural unit containing a benzoxazine group, and a structural unit containing a cyanate ester group.
- the glass transition temperature of the graft portion is -25 ° C or higher and 18 ° C or lower.
- the polymer particles (A) and the matrix resin (B) are 100% by weight, the polymer particles (A) are 20% by weight or more and 50% by weight or less, and the matrix resin (B) is It is preferably 50% by weight or more and 80% by weight or less.
- the "resin composition according to one embodiment of the present invention” may be simply referred to as “the present resin composition” below.
- the present resin composition has an advantage of being excellent in handleability due to the above-mentioned structure.
- “the resin composition is excellent in handleability” means that the viscosity of the resin composition is low, for example, the viscosity of the resin composition at 50 ° C. is 20,900 mPa ⁇ s or less. .. That is, the present resin composition has an advantage that the viscosity is low (for example, the viscosity of the resin composition at 50 ° C. is 20,900 mPa ⁇ s or less) due to the above-mentioned structure.
- the resin composition Since the present resin composition has the above-mentioned structure, the resin composition has an advantage that it is excellent in handleability even when the resin composition further contains an inorganic filler. That is, since the present resin composition has the above-mentioned structure, the viscosity of the resin composition is low even when the resin composition further contains an inorganic filler (for example, 25 ° C. of the resin composition containing the inorganic filler). The viscosity in the above is 280,000 mPa ⁇ s or less).
- the polymer particles (A) are fine particles obtained by polymerization.
- the polymer particles (A) have a graft portion.
- other configurations are not particularly limited.
- the polymer particles (A) can also be said to be a graft copolymer.
- a polymer graft-bonded to any polymer is referred to as a graft portion.
- the graft portion includes a structural unit containing an alkoxy group, a structural unit containing an aryloxy group, a structural unit containing an oxetane group, a structural unit containing a hydroxyl group, a structural unit containing an amino group, a structural unit containing an imide group, and a carboxylic acid group.
- the building blocks described above can interact with the inorganic filler. Therefore, since the graft portion does not include the above-mentioned structural unit, the resin composition has an advantage of being excellent in handleability even when the obtained resin composition further contains an inorganic filler.
- the graft portion is a polymer that does not contain (a) a structural unit containing an aromatic group, or (b) contains a structural unit containing an aromatic group in an amount of more than 0% by weight and 10% by weight or less in 100% by weight of the graft portion. be.
- the resin composition has an advantage of being excellent in handleability (that is, having a low viscosity). Since the obtained resin composition is superior in handleability, the graft portion does not contain a structural unit containing an aromatic group (in 100% by weight of the graft portion, the content of the structural unit containing an aromatic group is 0% by weight). Is more preferable.
- the graft portion contains at least one of a structural unit derived from alkyl methacrylate and a structural unit derived from alkyl acrylate. According to this configuration, there is an advantage that the glass transition temperature (Tg) of the graft portion can be lowered. Since the graft portion is (a) difficult to interact with the inorganic filler, and (b) the glass transition temperature (Tg) of the graft portion is lower, it is easy to obtain a graft portion having a Tg in a desired range.
- It is preferably a polymer having a total content of 50% by weight or more, more preferably a polymer having a total content of 55% by weight or more, still more preferably a polymer having a total content of 60% by weight or more, and 65% by weight.
- a polymer having a weight% or more a polymer having a weight of 70% by weight or more, a polymer having a weight of 75% by weight or more, and a polymer having a weight of 78% by weight or more. It is more preferably a polymer, further preferably a polymer having a weight of 80% by weight or more, and particularly preferably a polymer having a weight of 83% by weight or more.
- the upper limit of the total content of the structural unit derived from alkyl methacrylate and the structural unit derived from alkyl acrylate in 100% by weight of the graft portion is not particularly limited and may be, for example, 100% by weight.
- the graft portion is (a) difficult to interact with the inorganic filler, and (b) the glass transition temperature (Tg) of the graft portion is lower, so that Tg in a desired range can be obtained. Since it is easy to obtain a graft portion having a graft portion, it is preferable that the polymer contains at least one of a structural unit derived from alkyl methacrylate and a structural unit derived from alkyl acrylate in an amount of 50% by weight or more in 100% by weight of the graft portion.
- a polymer containing 60% by weight or more is more preferable, a polymer containing 60% by weight or more is more preferable, a polymer containing 65% by weight or more is more preferable, and a polymer containing 70% by weight or more is used. It is more preferable, a polymer containing 75% by weight or more is more preferable, a polymer containing 78% by weight or more is more preferable, and a polymer containing 80% by weight or more is further preferable, and 83% by weight is more preferable. It is particularly preferable that the polymer contains the above.
- the upper limit of the content of at least one of the structural unit derived from alkyl methacrylate and the structural unit derived from alkyl acrylate in 100% by weight of the graft portion is not particularly limited and may be, for example, 100% by weight.
- alkyl (meth) acrylate is intended to be at least one of alkyl methacrylate and alkyl acrylate. Since it is easy to lower the glass transition temperature of the graft portion, the number of carbon atoms of the alkyl group of the alkyl (meth) acrylate from which the constituent unit of the graft portion is derived is preferably 1 to 4.
- the graft portion is preferably a copolymer of a monomer component containing an alkyl (meth) acrylate having an alkyl group having 1 to 4 carbon atoms.
- the monomer component preferably contains 55% by weight or more of an alkyl (meth) acrylate having an alkyl group having 1 to 4 carbon atoms, and more preferably 65% by weight or more. , 75% by weight or more is more preferable, 78% by weight or more is further preferable, and 83% by weight or more is particularly preferable. Further, since the monomer component can enable the polymer particles (A) to be dispersed in the state of primary particles in the resin composition or a cured product thereof, the alkyl (meth) having an alkyl group having 1 to 4 carbon atoms.
- the acrylate is preferably contained in an amount of 95% by weight or less, more preferably 90% by weight or less.
- the "workability" of the resin composition is intended to be the "handleability" of the resin composition. Therefore, the expression “from the viewpoint of workability of the resin composition” is intended to mean "because the resin composition is excellent in handleability".
- the graft portion preferably contains a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 1 to 4 carbon atoms.
- the graft portion preferably contains 55% by weight or more of a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 1 to 4 carbon atoms in 100% by weight of the graft portion. , 65% by weight or more is more preferable, 75% by weight or more is more preferable, 78% by weight or more is further preferable, and 83% by weight or more is particularly preferable.
- the graft portion contains an alkyl group having 1 to 4 carbon atoms in 100% by weight of the graft portion. It is preferable to contain 95% by weight or less of the structural unit derived from the alkyl (meth) acrylate having, and more preferably 90% by weight or less.
- the monomer component preferably contains an alkyl (meth) acrylate having an alkyl group having 1 carbon atom.
- the monomer component preferably contains 10 to 100% by weight of an alkyl (meth) acrylate having an alkyl group having 1 carbon atom, and more preferably 11 to 95% by weight. , 12 to 92% by weight is more preferable, 13 to 55% by weight is further preferable, and 14 to 50% by weight is particularly preferable.
- the monomer component preferably contains an alkyl (meth) acrylate having an alkyl group having 2 carbon atoms.
- the monomer component preferably contains 10 to 100% by weight of an alkyl (meth) acrylate having an alkyl group having 2 carbon atoms, and more preferably 11 to 95% by weight. .. Further, the monomer component preferably contains an alkyl (meth) acrylate having an alkyl group having 3 carbon atoms. From the viewpoint of workability of the resin composition, the monomer component preferably contains 10 to 100% by weight of an alkyl (meth) acrylate having an alkyl group having 3 carbon atoms, and more preferably 11 to 95% by weight. .. Further, the monomer component preferably contains an alkyl (meth) acrylate having an alkyl group having 4 carbon atoms.
- the monomer component preferably contains 0 to 80% by weight of an alkyl (meth) acrylate having an alkyl group having 4 carbon atoms, and more preferably 1 to 78% by weight. It is more preferably contained in an amount of 2 to 76% by weight, further preferably contained in an amount of 20 to 74% by weight, and particularly preferably contained in an amount of 35 to 72% by weight.
- the graft portion preferably contains a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 1 carbon atom. Since the resin composition is excellent in handleability, the graft portion preferably contains 10 to 100% by weight of a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 1 carbon atom in 100% by weight of the graft portion. , 11 to 95% by weight is more preferable, 12 to 92% by weight is more preferable, 13 to 55% by weight is further preferable, and 14 to 50% by weight is particularly preferable.
- the graft portion preferably contains a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 2 carbon atoms. Since the resin composition is excellent in handleability, the graft portion preferably contains 10 to 100% by weight of a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 2 carbon atoms in 100% by weight of the graft portion. , 11-95% by weight, more preferably. Further, the graft portion preferably contains a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 3 carbon atoms.
- the graft portion preferably contains 10 to 100% by weight of a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 3 carbon atoms in 100% by weight of the graft portion. , 11-95% by weight, more preferably. Further, the graft portion preferably contains a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 4 carbon atoms. Since the resin composition is excellent in handleability, the graft portion preferably contains 0 to 80% by weight of a structural unit derived from an alkyl (meth) acrylate having an alkyl group having 4 carbon atoms in 100% by weight of the graft portion. It is more preferably contained in an amount of 1 to 78% by weight, more preferably 2 to 76% by weight, further preferably 20 to 74% by weight, and particularly preferably 35 to 72% by weight.
- the graft portion Since the graft portion has the above configuration, it can play various roles.
- the “various roles" are, for example, (a) improving the compatibility between the polymer particles (A) and the matrix resin (B), and (b) the dispersibility of the polymer particles (A) in the matrix resin to be mixed. (C) Allowing the polymer particles (A) to be dispersed in the state of primary particles in the resin composition or a cured product thereof, and the like.
- alkyl methacrylate is intended to be an alkyl methacrylate having no reactive functional groups (eg, alkoxy groups, hydroxyl groups, etc.).
- alkyl methacrylate include methyl methacrylate (MMA), ethyl methacrylate (EMA), butyl methacrylate (BMA) and 2-ethylhexyl methacrylate (EHMA).
- alkyl acrylate is intended to be an alkyl acrylate that does not have reactive functional groups (eg, alkoxy groups, hydroxyl groups, etc.).
- specific examples of the alkyl acrylate include methyl acrylate (MA), ethyl acrylate (EA), n-butyl acrylate (BA) and 2-ethylhexyl acrylate (EHA).
- the graft portion may be a polymer containing only one of a structural unit derived from alkyl methacrylate and a structural unit derived from alkyl acrylate, or a polymer containing both.
- the graft portion preferably contains a structural unit having an epoxy group as a structural unit. According to the above configuration, the graft portion of the polymer particles (A) and the matrix resin (B) can be chemically bonded in the resin composition. This makes it possible to maintain a good dispersed state of the polymer particles (A) in the resin composition or the cured product thereof without aggregating the polymer particles (A).
- a monomer having an epoxy group may be used in the production (polymerization) of the graft portion.
- the monomer having an epoxy group include a glycidyl group-containing vinyl monomer such as glycidyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate glycidyl ether, and allyl glycidyl ether.
- (meth) acrylate is intended to be acrylate and / or methacrylate.
- the graft portion preferably contains a structural unit having an epoxy group in an amount of more than 0% by weight and 50% by weight or less, more preferably 1% by weight or more and 40% by weight or less, in 100% by weight of the graft portion. It is more preferably contained in an amount of 30% by weight or less, particularly preferably contained in an amount of 3% by weight or more and 20% by weight or less, and most preferably contained in an amount of 3% by weight or more and 16% by weight or less.
- the graft portion contains (a) more than 0% by weight of a structural unit derived from a monomer having an epoxy group in 100% by weight of the graft portion, the obtained resin composition is cured with sufficient impact resistance.
- a product can be provided, and (b) when 50% by weight or less is contained, the obtained resin composition can provide a cured product having sufficient impact resistance, and the storage stability of the resin composition can be provided. It has the advantage of good properties.
- Epoxy groups can react (interact) with inorganic fillers (eg silica, etc.). Therefore, from the viewpoint of handleability of the resin composition further containing the inorganic filler, it is preferable that the amount of the structural unit having an epoxy group contained in the graft portion is small.
- the structural unit derived from the monomer having an epoxy group is preferably contained in the graft portion, and more preferably contained only in the graft portion.
- the graft portion may contain a structural unit derived from a polyfunctional monomer as a structural unit.
- a structural unit derived from a polyfunctional monomer (a) the swelling of the polymer particles (A) can be prevented in the resin composition, and (b) the viscosity of the resin composition is high. Since it is low, the resin composition tends to be easy to handle, and (c) the dispersibility of the polymer particles (A) in the matrix resin (B) is improved.
- the obtained resin composition has toughness and a toughness as compared with the case where the graft portion contains a structural unit derived from a polyfunctional monomer. It is possible to provide a cured product having better impact resistance.
- the polyfunctional monomer has two or more radically polymerizable reactive groups in the same molecule.
- the radically polymerizable reactive group is preferably a carbon-carbon double bond.
- examples of the polyfunctional monomer include (meth) acrylates having an ethylenically unsaturated double bond, such as allylalkyl (meth) acrylates and allyloxyalkyl (meth) acrylates, which do not contain butadiene. Will be done.
- Examples of the monomer having two (meth) acrylic groups include ethylene glycol di (meth) acrylate, butylene glycol di (meth) acrylate, butanediol di (meth) acrylate, hexanediol di (meth) acrylate, and cyclohexanedimethanol.
- Di (meth) acrylates and polyethylene glycol di (meth) acrylates can be mentioned.
- Examples of the polyethylene glycol di (meth) acrylates include triethylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, and polyethylene glycol (600) di (meth) acrylate.
- alkoxylated trimethylolpropane tri (meth) acrylates alkoxylated trimethylolpropane tri (meth) acrylates, glycerol propoxytri (meth) acrylates, pentaerythritol tri (meth) acrylates, and tris (2-hydroxy).
- Ethyl) isocyanuratetri (meth) acrylate and the like are exemplified.
- alkoxylated trimethylolpropane tri (meth) acrylate examples include trimethylolpropane tri (meth) acrylate and trimethylolpropane triethoxytri (meth) acrylate.
- examples of the monomer having four (meth) acrylic groups include pentaerythritol tetra (meth) acrylate and ditrimethylolpropane tetra (meth) acrylate. Further, as a monomer having five (meth) acrylic groups, dipentaerythritol penta (meth) acrylate and the like are exemplified. Further, as a monomer having six (meth) acrylic groups, ditrimethylolpropane hexa (meth) acrylate and the like are exemplified. Examples of the polyfunctional monomer also include diallyl phthalate, triallyl cyanurate, triallyl isocyanurate, divinylbenzene and the like.
- examples of the polyfunctional monomer that can be preferably used for the polymerization of the graft portion include allyl methacrylate, diallyl phthalate, triallyl isocyanurate, and divinylbenzene. Only one kind of these polyfunctional monomers may be used, or two or more kinds thereof may be used in combination.
- the graft portion preferably contains 1 to 20% by weight of a structural unit derived from a polyfunctional monomer in 100% by weight of the graft portion, and more preferably 5 to 15% by weight.
- the graft portion may include, as the structural unit, a structural unit derived from another monomer in addition to the structural unit derived from the above-mentioned monomer.
- the graft portion is preferably a polymer graft-bonded to an elastic body described later.
- the glass transition temperature of the graft portion (hereinafter, may be simply referred to as “Tg”) is ⁇ 25 ° C. or higher and ⁇ 23 ° C. from the viewpoint of preventing fusion of the polymer particles (A) in the resin composition.
- Tg Glass transition temperature of the graft portion
- the above is preferable, -21 ° C. or higher is more preferable, -19 ° C. or higher is more preferable, -17 ° C. or higher is more preferable, -15 ° C. or higher is further preferable, and -13 ° C. or higher is particularly preferable.
- the Tg of the graft portion is 18 ° C. or lower, preferably 16 ° C. or lower, more preferably 14 ° C. or lower, and more preferably 12 ° C., because a resin composition having a low viscosity (that is, a resin composition having excellent handleability) can be obtained.
- the following is more preferable, 10 ° C. or lower is more preferable, 8 ° C. or lower is more preferable, 6 ° C. or lower is more preferable, 4 ° C. or lower is more preferable, 2 ° C. or lower is more preferable, 0 ° C. or lower is more preferable, and -2 ° C.
- -4 ° C or lower is more preferable, -5 ° C or lower is more preferable, -7 ° C or lower is more preferable, -9 ° C or lower is further preferable, and -11 ° C or lower is particularly preferable.
- the Tg of the graft portion can be determined by the composition of the structural unit contained in the graft portion and the like. In other words, the Tg of the obtained graft portion can be adjusted by changing the composition of the monomer used when producing (polymerizing) the graft portion.
- the glass transition temperature Tg of the graft portion is the FOX shown below. It can be calculated by the formula (formula 1).
- Tg 1 / Tg w 1 / Tg 1 + w 2 / Tg 2 + ... + w n / Tg n (Formula 1)
- Tg 1 , Tg 2 , ..., Tg n are the single weights of the components constituting the graft portion (that is, the monomers used in the production of the graft portion) 1, 2, ..., N, respectively.
- the combined Tg (K), w 1 , w 2 , ..., Wn are the components constituting the graft portion (that is, the monomers used in the production of the graft portion) 1, 2, ..., Respectively, respectively. It is a weight fraction of n.
- Tg of the homopolymer for example, the numerical values described in Polymer Handbook Fourth Edition (edited by J. Brandup et al., Jphn Wiley & Sons, Inc) can be used. Further, in the case of a new polymer, the peak temperature of the loss tangent (tan ⁇ ) in the viscoelasticity measuring method (shearing method, measurement frequency: 1 Hz) may be adopted as Tg.
- the Tg of the graft portion can also be obtained by measuring the viscoelasticity using a flat plate made of the polymer particles (A). Specifically, Tg can be measured as follows: (1) For a flat plate made of polymer particles (A), a dynamic viscoelasticity measuring device (for example, DVA-200 manufactured by IT Measurement Control Co., Ltd.). A dynamic viscoelasticity measurement is performed under tensile conditions to obtain a graph of tan ⁇ ; (2) With respect to the obtained graph of tan ⁇ , the peak temperature of tan ⁇ is defined as the glass transition temperature.
- the highest peak temperature is taken as the glass transition temperature of the graft portion.
- the monomer that provides the homopolymer having a Tg of 0 ° C. or lower is referred to as monomer a.
- the monomer a include ethyl acrylate, butyl acrylate (also known as butyl acrylate), 2-ethylhexyl acrylate, octyl (meth) acrylate, and dodecyl (meth) acrylate. Only one kind of these monomers a may be used, or two or more kinds thereof may be used in combination. Among these monomers a, ethyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate are particularly preferable.
- the graft portion preferably contains 20% by weight or more, more preferably 30% by weight or more, and further preferably 40% by weight or more of the structural unit derived from the monomer a in 100% by weight of the graft portion. .. Further, the graft portion preferably contains 95% by weight or less of a structural unit derived from a monomer having a glass transition temperature of 0 ° C. or less, and more preferably 90% by weight or less, in 100% by weight of the graft portion. , 80% by weight or less is more preferable. When the graft portion contains 20% by weight or more of the structural unit derived from the monomer a in 100% by weight of the graft portion, a resin composition having a lower viscosity can be obtained.
- the polymer particles (A) are polymers having the same composition as the grafted portion, and are not graft-bonded to any polymer (for example, an elastic body described later). You may have.
- a polymer having the same structure as the graft portion and not graft-bonded to any polymer is also referred to as a non-grafted polymer.
- the non-grafted polymer also constitutes a part of the polymer particles (A) according to the embodiment of the present invention. It can be said that the non-grafted polymer is a polymer produced in the polymerization (preparation step) of the graft portion and which is not graft-bonded to any polymer.
- the ratio of the polymer graft-bonded to any polymer, that is, the graft portion is referred to as the graft ratio.
- the graft ratio can be said to be a value represented by (weight of graft portion) / ⁇ (weight of graft portion) + (weight of non-grafted polymer) ⁇ ⁇ 100.
- a soluble component is also present in addition to the graft portion and the non-grafted polymer.
- This soluble component is intended as an auxiliary material such as a non-polymerized monomer and an initiator.
- Examples of the method for determining whether the polymer particles (A), the non-grafted polymer, or the soluble component include a method for determining whether the solvent is soluble / insoluble.
- the polymer particles (A) when it is insoluble in MEK (i) a non-grafted polymer when it is soluble in MEK and insoluble in methanol, and (iii) soluble in MEK and Examples thereof include a method of determining a soluble component when it is soluble in methanol.
- the graft ratio of the graft portion is preferably 70% or more, more preferably 80% or more, and further preferably 90% or more.
- the graft ratio is 70% or more, there is an advantage that the viscosity of the resin composition does not become too high.
- the method of calculating the graft ratio is as follows. First, an aqueous suspension containing the polymer particles (A) is obtained, and then, from the aqueous suspension, a powder or granular material of the polymer particles (A) is obtained.
- a method for obtaining the powder or granular material of the polymer particles (A) from the aqueous suspension specifically, (i) the polymer particles (A) in the aqueous suspension are coagulated and (ii) can be obtained. Examples thereof include a method of obtaining powder or granular material of the polymer particles (A) by dehydrating the coagulated product and (iii) further drying the coagulated product.
- MEK methyl ethyl ketone
- (1) to (3) are carried out: (1) Using a centrifuge (CP60E manufactured by Hitachi Koki Co., Ltd.), MEK melting obtained at a rotation speed of 30,000 rpm for 1 hour.
- the substance is subjected to centrifugation, and the lysate is separated into a MEK-soluble component and a MEK-insoluble component; (2) the obtained MEK-soluble component and MEK are mixed, and the obtained MEK mixture is obtained as described above. Centrifuge at a speed of 30,000 rpm for 1 hour using a centrifuge to separate the MEK mixture into MEK-soluble and MEK-insoluble components; (3) Repeat the above operation (2) once (3). That is, the centrifugation work is carried out three times in total). By such an operation, a concentrated MEK-soluble component is obtained. Next, 20 ml of the concentrated MEK-soluble component is mixed with 200 ml of methanol.
- the weight of the polymer other than the graft portion is the amount of the monomers constituting the polymer other than the graft portion.
- the polymer other than the graft portion is, for example, an elastic body.
- the polymer particles (A) contain a surface crosslinked polymer described later, the polymer other than the graft portion contains both an elastic body and a surface crosslinked polymer.
- the weight of the polymer in the graft portion is the total weight of the monomer components (monomer mixture for forming the graft portion) used in the preparation of the polymer in the graft portion.
- the method of coagulating the polymer particles (A) is not particularly limited, and a method using a solvent, a method using a coagulant, a method of spraying an aqueous suspension, or the like can be used.
- the graft portion may consist of only one type of graft portion having a structural unit having the same composition. In one embodiment of the invention, the graft portion may consist of a plurality of types of graft portions, each having a constituent unit having a different composition.
- each of the plurality of types of graft portions is referred to as a graft portion 1 , a graft portion 2 , ..., A graft portion n (n is an integer of 2 or more).
- the graft portion may contain a complex of the graft portion 1 , the graft portion 2 , ..., And the graft portion n , which are polymerized separately.
- the graft portion may contain one polymer obtained by sequentially polymerizing the graft portion 1 , the graft portion 2 , ..., And the graft portion n , respectively.
- Such polymerization of a plurality of polymerization portions (graft portions) in order is also referred to as multi-stage polymerization.
- a polymer obtained by multi-stage polymerization of a plurality of types of graft portions is also referred to as a multi-stage polymerization graft portion.
- the method for manufacturing the multi-stage polymerization graft portion will be described in detail later.
- the graft portion When the graft portion is composed of a plurality of types of graft portions, all of the plurality of types of graft portions may not be graft-bonded to the elastic body. It is sufficient that at least a part of the graft portion of at least one type is graft-bonded to the elastic body, and the graft portion of the other species (several other types) is the graft portion graft-bonded to the elastic body. It may be graft-bonded to.
- the graft portion is composed of a plurality of types of graft portions, the polymer has the same configuration as the plurality of types of graft portions, and the plurality of types of polymers not graft-bonded to the elastic body (multiple types of non-polymers). It may have a graft polymer).
- a multi-stage polymerization graft portion including the graft portion 1 , the graft portion 2 , ..., And the graft portion n will be described.
- the graft portion n may cover at least a part of the graft portion n - 1, or may cover the entire graft portion n-1 .
- a part of the graft portion n may enter the inside of the graft portion n-1 .
- each of the plurality of graft portions may form a layered structure.
- the graft portion 1 forms the innermost layer in the graft portion
- the layer of the graft portion 2 is formed on the outside of the graft portion 1 .
- an embodiment in which the layer of the graft portion 3 is formed as the outermost layer on the outer side of the layer of the graft portion 2 is also an aspect of the present invention.
- the multi-stage polymerization graft portion in which each of the plurality of graft portions forms a layered structure can be said to be a multilayer graft portion. That is, in one embodiment of the present invention, the graft portion may include (a) a complex of a plurality of types of graft portions, (b) a multistage polymerization graft portion and / or (c) a multilayer graft portion.
- the graft portion is arbitrary in the obtained polymer particles (A). It may cover at least a portion of the polymer. It can be said that the arbitrary polymer and the graft portion are polymerized in this order, in other words, the arbitrary polymer and the graft portion are polymerized in multiple stages.
- the polymer particles (A) obtained by multi-stage polymerization of an arbitrary polymer and a graft portion can be said to be a multi-stage polymer.
- the graft portion can cover at least a part of any polymer (for example, an elastic body described later), or can cover the whole of any polymer.
- a part of the graft portion may enter the inside of any polymer. It is preferable that at least a part of the graft portion covers at least a part of the elastic body. In other words, it is preferable that at least a part of the graft portion is present on the outermost side of the polymer particles (A).
- any polymer (for example, an elastic body described later) and a graft portion may form a layered structure.
- an embodiment in which the elastic body forms the innermost layer (also referred to as a core layer) and the layer of the graft portion is formed as the outermost layer (also referred to as a shell layer) on the outer side of the elastic body is also one aspect of the present invention. be.
- a structure in which the elastic body is used as the core layer and the graft portion is used as the shell layer can be said to be a core-shell structure.
- the polymer particles (A) in which the elastic body and the graft portion form a layer structure (core-shell structure) can be said to be a multilayer polymer or a core-shell polymer. That is, in one embodiment of the present invention, the polymer particles (A) may be a multi-stage polymer and / or may be a multilayer polymer or a core-shell polymer. However, the polymer particles (A) are not limited to the above composition as long as they have a graft portion.
- the polymer particles (A) preferably have an elastic body.
- the above-mentioned graft portion is preferably a polymer graft-bonded to an elastic body. That is, the polymer particles (A) are preferably rubber-containing graft copolymers having an elastic body and a graft portion graft-bonded to the elastic body.
- the polymer particles (A) are rubber-containing graft copolymers.
- the elastic body preferably contains at least one selected from the group consisting of diene-based rubber, (meth) acrylate-based rubber, and organosiloxane-based rubber.
- the elastic body may contain natural rubber in addition to the above-mentioned rubber.
- the elastic body can also be rephrased as an elastic portion or rubber particles.
- the elastic body contains diene rubber (case (1))
- the obtained resin composition can provide a cured product having excellent toughness and impact resistance.
- a cured product having excellent toughness and / or impact resistance can be said to be a cured product having excellent durability.
- the diene-based rubber is an elastic body containing a constituent unit derived from a diene-based monomer as a constituent unit.
- the diene-based monomer can also be rephrased as a conjugated diene-based monomer.
- the diene-based rubber contains 50 to 100% by weight of the constituent unit derived from the diene-based monomer in 100% by weight of the constituent unit, and the diene-based single amount capable of copolymerizing with the diene-based monomer. It may contain 0 to 50% by weight of a structural unit derived from a vinyl-based monomer other than the body.
- the diene-based rubber may contain, as the structural unit, the structural unit derived from the (meth) acrylate-based monomer in a smaller amount than the structural unit derived from the diene-based monomer. ..
- diene-based monomer examples include 1,3-butadiene, isoprene (2-methyl-1,3-butadiene), 2-chloro-1,3-butadiene and the like. Only one kind of these diene-based monomers may be used, or two or more kinds thereof may be used in combination.
- vinyl-based monomer A examples include styrene, ⁇ -methylstyrene, and monochlorostyrene.
- the vinyl-based monomer A described above only one type may be used, or two or more types may be used in combination. Among the vinyl-based monomers A described above, styrene is particularly preferable.
- the structural unit derived from the vinyl monomer A is an optional component.
- the diene-based rubber may be composed of only the structural units derived from the diene-based monomer.
- the diene-based rubber is a butadiene rubber (also referred to as polybutadiene rubber) composed of a structural unit derived from 1,3-butadiene, or a copolymer of 1,3-butadiene and styrene.
- Butadiene-styrene rubber also referred to as polystyrene-butadiene
- butadiene rubber is preferable, and butadiene rubber is more preferable.
- the desired effect can be more exhibited by the polymer particles (A) containing the diene-based rubber.
- Butadiene-styrene rubber is also more preferable in that the transparency of the obtained cured product can be enhanced by adjusting the refractive index.
- the (meth) acrylate-based rubber is an elastic body containing a structural unit derived from the (meth) acrylate-based monomer as a structural unit.
- the (meth) acrylate-based rubber contains 50 to 100% by weight of the constituent unit derived from the (meth) acrylate-based monomer and the (meth) acrylate-based monomer in 100% by weight of the constituent unit. It may contain 0 to 50% by weight of a structural unit derived from a vinyl-based monomer other than the (meth) acrylate-based monomer copolymerizable with.
- the (meth) acrylate-based rubber contains, as the structural unit, the structural unit derived from the diene-based monomer in a smaller amount than the structural unit derived from the (meth) acrylate-based monomer. You may.
- Examples of the (meth) acrylate-based monomer include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, and dodecyl (meth) acrylate.
- Alkyl (meth) acrylates such as stearyl (meth) acrylate and behenyl (meth) acrylate; aromatic ring-containing (meth) acrylates such as phenoxyethyl (meth) acrylate and benzyl (meth) acrylate; 2-hydroxyethyl (meth) ) Hydroxyalkyl (meth) acrylates such as acrylates and 4-hydroxybutyl (meth) acrylates; glycidyl (meth) acrylates such as glycidyl (meth) acrylates and glycidylalkyl (meth) acrylates; alkoxyalkyl (meth) acrylates; Allylalkyl (meth) acrylates such as allyl (meth) acrylates and allylalkyl (meth) acrylates; monoethylene glycol di (meth) acrylates, triethylene glycol di (meth) acrylates, tetraethylene glycol di
- Examples thereof include polyfunctional (meth) acrylates. Only one kind of these (meth) acrylate-based monomers may be used, or two or more kinds thereof may be used in combination. Among these (meth) acrylate-based monomers, ethyl (meth) acrylate, butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate are preferable, and butyl (meth) acrylate is more preferable.
- the (meth) acrylate rubber shall be at least one selected from the group consisting of ethyl (meth) acrylate rubber, butyl (meth) acrylate rubber and 2-ethylhexyl (meth) acrylate rubber. Is preferable, and butyl (meth) acrylate rubber is more preferable.
- Ethyl (meth) acrylate rubber is a rubber composed of a structural unit derived from ethyl (meth) acrylate
- butyl (meth) acrylate rubber is a rubber composed of a structural unit derived from butyl (meth) acrylate.
- Meta) Acrylate rubber is a rubber composed of structural units derived from 2-ethylhexyl (meth) acrylate. According to this configuration, the glass transition temperature (Tg) of the elastic body is lowered, so that the polymer particles (A) having a low Tg and the resin composition can be obtained. As a result, (a) the obtained resin composition can provide a cured product having excellent toughness, and (b) the viscosity of the resin composition can be further lowered.
- the vinyl-based monomer (hereinafter, also referred to as vinyl-based monomer B) other than the (meth) acrylate-based monomer copolymerizable with the (meth) acrylate-based monomer is the vinyl-based single amount. Examples thereof include the monomers listed in the body A. As the vinyl-based monomer B, only one type may be used, or two or more types may be used in combination. Among the vinyl-based monomers B, styrene is particularly preferable.
- the structural unit derived from the vinyl-based monomer B is an optional component. In the case (2), the (meth) acrylate-based rubber may be composed of only the structural units derived from the (meth) acrylate-based monomer.
- the elastic body contains an organosiloxane-based rubber (case (3))
- case (3) the obtained resin composition can provide a cured product having sufficient heat resistance and excellent impact resistance at a low temperature.
- the organosiloxane-based rubber is composed of an alkyl or aryl 2-substituted silyloxy unit such as (a) dimethylsilyloxy, diethylsilyloxy, methylphenylsilyloxy, diphenylsilyloxy, dimethylsilyloxy-diphenylsilyloxy and the like.
- organosiloxane-based polymers and (b) organosiloxane-based polymers composed of alkyl or aryl 1-substituted silyloxy units, such as (b) organohydrogensilyloxy in which a part of the alkyl in the side chain is substituted with a hydrogen atom. Be done. Only one kind of these organosiloxane-based polymers may be used, or two or more kinds thereof may be used in combination.
- the polymer composed of dimethylsilyloxy units is referred to as dimethylsilyloxy rubber
- the polymer composed of methylphenylsilyloxy units is referred to as methylphenylsilyloxy rubber
- dimethylsilyloxy units and diphenylsilyl are referred to as dimethylsilyloxy-diphenylsilyloxy rubber.
- the dimethylsilyloxy rubber and methyl It is preferably one or more selected from the group consisting of phenylsilyloxy rubber and dimethylsilyloxy-diphenylsilyloxy rubber, and (b) dimethylsilyloxy rubber because it is easily available and economical. Is more preferable.
- the polymer particles (A) preferably contain 80% by weight or more of the organosiloxane-based rubber, and 90% by weight or more, in 100% by weight of the elastic body contained in the polymer particles (A). It is more preferable to do. According to the above configuration, the obtained resin composition can provide a cured product having excellent heat resistance.
- the elastic body may further contain an elastic body other than the diene-based rubber, the (meth) acrylate-based rubber, and the organosiloxane-based rubber.
- an elastic body other than the diene-based rubber, the (meth) acrylate-based rubber, and the organosiloxane-based rubber include natural rubber.
- the elastic body is a butadiene rubber, a butadiene-styrene rubber, a butadiene- (meth) acrylate rubber, an ethyl (meth) acrylate rubber, a butyl (meth) acrylate rubber, and a 2-ethylhexyl (meth) acrylate rubber.
- Dimethylsilyloxy rubber, methylphenylsilyloxy rubber, and dimethylsilyloxy-diphenylsilyloxy rubber preferably one or more selected from the group consisting of butadiene rubber, butadiene-styrene rubber, and butyl (meth) acrylate.
- a crosslinked structure of elastic body From the viewpoint of maintaining the dispersion stability of the polymer particles (A) in the matrix resin (B), it is preferable that a crosslinked structure is introduced into the elastic body.
- a generally used method can be adopted, and examples thereof include the following methods. That is, in the production of an elastic body, there is a method in which a cross-linking monomer such as a polyfunctional monomer and / or a mercapto group-containing compound is mixed with a monomer that can form an elastic body, and then polymerized. ..
- producing a polymer such as an elastic body is also referred to as polymerizing a polymer.
- a method for introducing a crosslinked structure into an organosiloxane-based rubber the following methods can also be mentioned: (1) When polymerizing an organosiloxane-based rubber, a polyfunctional alkoxysilane compound and other materials are used. , (2) Reactive groups (eg, (i) mercapto group and (ii) reactive vinyl group, etc.) are introduced into the organosiloxane rubber, and then the reaction product obtained is (A) A method of adding an organic peroxide or (b) a polymerizable vinyl monomer to cause a radical reaction, or (3) a polyfunctional monomer when polymerizing an organosiloxane-based rubber. And / or a method of mixing a crosslinkable monomer such as a mercapto group-containing compound with other materials and then polymerizing, etc.
- Reactive groups eg, (i) mercapto group and (ii) reactive vinyl group, etc.
- polyfunctional monomer examples include the polyfunctional monomer exemplified in the above-mentioned (graft portion) section.
- Examples of the mercapto group-containing compound include alkyl group substituted mercaptan, allyl group substituted mercaptan, aryl group substituted mercaptan, hydroxy group substituted mercaptan, alkoxy group substituted mercaptan, cyano group substituted mercaptan, amino group substituted mercaptan, silyl group substituted mercaptan, and acid group substituted.
- Examples thereof include mercaptans, halo group-substituted mercaptans and acyl group-substituted mercaptans.
- alkyl group-substituted mercaptan an alkyl group-substituted mercaptan having 1 to 20 carbon atoms is preferable, and an alkyl group-substituted mercaptan having 1 to 10 carbon atoms is more preferable.
- aryl group-substituted mercaptan a phenyl group-substituted mercaptan is preferable.
- alkoxy group-substituted mercaptan an alkoxy group-substituted mercaptan having 1 to 20 carbon atoms is preferable, and an alkoxy group-substituted mercaptan having 1 to 10 carbon atoms is more preferable.
- the acid group-substituted mercaptan is preferably an alkyl group-substituted mercaptan having a carboxyl group and having 1 to 10 carbon atoms, or an aryl group-substituted mercaptan having a carboxyl group and having 1 to 12 carbon atoms.
- the glass transition temperature of the elastic body is preferably 80 ° C. or lower, more preferably 70 ° C. or lower, more preferably 60 ° C. or lower, more preferably 50 ° C. or lower, more preferably 40 ° C. or lower, more preferably 30 ° C. or lower, 20 ° C. or lower.
- ° C or lower is more preferable, 10 ° C or lower is more preferable, 0 ° C or lower is more preferable, ⁇ 20 ° C or lower is more preferable, ⁇ 40 ° C or lower is more preferable, ⁇ 45 ° C or lower is more preferable, and ⁇ 50 ° C or lower is more preferable.
- ⁇ 60 ° C. or lower is more preferable, ⁇ 65 ° C. or lower is more preferable, ⁇ 70 ° C. or lower is more preferable, ⁇ 75 ° C. or lower is more preferable, ⁇ 80 ° C. or lower is more preferable, and ⁇ 80 ° C. or lower is more preferable.
- -85 ° C or lower is more preferable, -90 ° C or lower is more preferable, -95 ° C or lower is more preferable, -100 ° C or lower is more preferable, -105 ° C or lower is more preferable, -110 ° C or lower is more preferable, and -115 ° C. ° C.
- the "glass transition temperature” may be referred to as "Tg".
- Tg glass transition temperature
- the polymer particles (A) having a low Tg and the resin composition having a low Tg can be obtained.
- the obtained resin composition can provide a cured product having excellent toughness.
- the viscosity of the obtained resin composition can be further lowered.
- the glass transition temperature Tg of the elastic body is the above-mentioned FOX formula.
- Tg 1 , Tg 2 , ..., Tg n and w 1 , w 2 , ..., W n were used in the production of the components constituting the elastic body (that is, the graft portion), respectively. It can be calculated by substituting the Tg of the monomer) with the weight ratio of the components constituting the elastic body (that is, the monomer used in the production of the graft portion).
- the Tg of the elastic body can also be obtained by performing viscoelasticity measurement using a flat plate made of the polymer particles (A).
- Tg can be measured as follows: (1) For a flat plate made of polymer particles (A), a dynamic viscoelasticity measuring device (for example, DVA-200 manufactured by IT Measurement Control Co., Ltd.). A dynamic viscoelasticity measurement is performed under tensile conditions to obtain a graph of tan ⁇ ; (2) With respect to the obtained graph of tan ⁇ , the peak temperature of tan ⁇ is defined as the glass transition temperature.
- the graph of tan ⁇ when a plurality of peaks are obtained, the lowest peak temperature is taken as the glass transition temperature of the elastic body.
- the Tg of the elastic body is larger than 0 ° C. because it is possible to suppress a decrease in the elastic modulus (rigidity) of the obtained cured product, that is, a cured product having a sufficient elastic modulus (rigidity) can be obtained. It is preferably 20 ° C. or higher, more preferably 50 ° C. or higher, particularly preferably 80 ° C. or higher, and most preferably 120 ° C. or higher.
- the Tg of the elastic body can be determined by the composition of the structural unit contained in the elastic body and the like. In other words, the Tg of the obtained elastic body can be adjusted by changing the composition of the monomer used when producing (polymerizing) the elastic body.
- monomer b the monomer that provides a homopolymer having a Tg greater than 0 ° C.
- the monomer b is not limited to the following, but for example, unsubstituted vinyl aromatic compounds such as styrene and 2-vinylnaphthalene; vinyl substituted aromatic compounds such as ⁇ -methylstyrene; 3-methylstyrene.
- Ring hydroxylated vinyl aromatic compounds such as 4-human oxystyrene; Vinyl esters such as vinyl benzoate and vinyl cyclohexanoate; Vinyl halides such as vinyl chloride; Aromatic monomers such as acenaphthalene and inden Classes; Alkyl methacrylates such as methyl methacrylate, ethyl methacrylate and isopropyl methacrylate; Aromatic methacrylates such as phenyl methacrylate; Methacrylates such as isobornyl methacrylate and trimethylsilyl methacrylate; Methacrylic monomers containing methacrylic acid derivatives such as methacrylic nitrile Certain acrylic acid esters such as isobornyl acrylate and tert-butyl acrylate; acrylic monomers containing acrylic acid derivatives such as acrylonitrile, and the like.
- the monomers that can be contained in the monomer group a acrylamide, isopropylacrylamide, N-vinylpyrrolidone, isobornyl methacrylate, dicyclopentanyl methacrylate, 2-methyl-2-adamantyl methacrylate, 1- Examples thereof include monomers such as adamantyl acrylate and 1-adamantyl methacrylate, which can provide a homopolymer having a Tg of 120 ° C. or higher when made into a homopolymer. Only one kind of these monomers b may be used, or two or more kinds thereof may be used in combination.
- the structural unit derived from at least one monomer selected from the group consisting of the above-mentioned monomer a is 0 to 50 (more preferably 1 to 35% by weight), and the group consisting of the monomer b.
- An elastic body containing 50 to 100% by weight (more preferably 65 to 99% by weight) of a structural unit derived from at least one selected monomer is referred to as an elastic body G.
- the elastic body G has a Tg larger than 0 ° C. Further, when the elastic body contains the elastic body G, the obtained resin composition can provide a cured product having sufficient rigidity.
- the crosslinked structure is introduced into the elastic body.
- the method for introducing the crosslinked structure include the above method.
- the volume average particle size of the elastic body is not particularly limited, but is preferably 0.03 ⁇ m to 50.00 ⁇ m, more preferably 0.05 ⁇ m to 10.00 ⁇ m, more preferably 0.08 ⁇ m to 2.00 ⁇ m, and more preferably 0.10 ⁇ m to 0.10 ⁇ m. 1.00 ⁇ m is more preferable, 0.10 ⁇ m to 0.80 ⁇ m is more preferable, 0.10 ⁇ m to 0.50 ⁇ m is more preferable, 0.15 ⁇ m or more and 0.30 ⁇ m or less is more preferable, and 0.15 ⁇ m or more and 0.
- the volume average particle diameter of the elastic body is (a) 0.03 ⁇ m or more, an elastic body having a desired volume average particle diameter can be stably obtained, and (b) when it is 50.00 ⁇ m or less, it is obtained.
- the heat resistance and impact resistance of the cured product or molded product to be obtained are improved.
- the volume average particle size of the elastic body is (a) 0.15 ⁇ m or more, the viscosity of the resin composition is low, and the resin composition has an advantage of excellent handling, and (b) 0.30 ⁇ m or less.
- the volume average particle size of the elastic body can be measured by using an aqueous suspension containing the elastic body as a sample and using a dynamic light scattering type particle size distribution measuring device or the like. The method for measuring the volume average particle size of the elastic body will be described in detail in the following examples.
- the proportion of the elastic body in the polymer particles (A) is preferably 40 to 97% by weight, more preferably 60 to 95% by weight, and further 70 to 93% by weight, assuming that the entire polymer particles (A) are 100% by weight. preferable.
- the ratio of the elastic body is (a) 40% by weight or more, the obtained resin composition can provide a cured product having excellent toughness and impact resistance, and (b) 97% by weight or less.
- the polymer particles (A) do not easily aggregate, the resin composition does not have a high viscosity, and as a result, the obtained resin composition can be excellent in handling.
- the elastic body is preferably one that can swell in a suitable solvent but is substantially insoluble.
- the elastic body is preferably insoluble in the matrix resin (B) used.
- the elastic body preferably has a gel content of 60% by weight or more, more preferably 80% by weight or more, further preferably 90% by weight or more, and particularly preferably 95% by weight or more.
- the obtained resin composition can provide a cured product having excellent toughness.
- the method for calculating the gel content is as follows. First, an aqueous suspension containing the polymer particles (A) is obtained, and then, from the aqueous suspension, a powder or granular material of the polymer particles (A) is obtained.
- the method for obtaining the powder or granular material of the polymer particles (A) from the aqueous suspension is not particularly limited, but for example, (i) the polymer particles (A) in the aqueous suspension are aggregated to obtain (ii). Examples thereof include a method of obtaining a powder or granular material of the polymer particles (A) by dehydrating the agglomerates to be obtained and (iii) further drying the agglomerates.
- the obtained MEK lysate is separated into a MEK-soluble component (MEK-soluble component) and a MEK-insoluble component (MEK-insoluble component).
- MEK-soluble component MEK-soluble component
- MEK-insoluble component MEK-insoluble component
- a centrifuge CP60E manufactured by Hitachi Koki Co., Ltd.
- the obtained MEK lysate is subjected to centrifugation at a rotation speed of 30,000 rpm for 1 hour, and the lysate can be used for MEK. It separates into a dissolved component and a MEK insoluble component.
- a total of three sets of centrifugation work are carried out.
- the "elastic body" of the polymer particles (A) may consist of only one type of elastic body having the same composition of constituent units.
- the "elastic body" of the polymer particles (A) is one selected from the group consisting of a diene-based rubber, a (meth) acrylate-based rubber, and an organosiloxane-based rubber.
- the "elastic body" of the polymer particles (A) may consist of a plurality of types of elastic bodies having different constituent units.
- the "elastic body" of the polymer particles (A) may be two or more selected from the group consisting of a diene-based rubber, a (meth) acrylate-based rubber, and an organosiloxane-based rubber.
- the "elastic body” of the polymer particles (A) may be one selected from the group consisting of a diene-based rubber, a (meth) acrylate-based rubber, and an organosiloxane-based rubber.
- the "elastic body" of the polymer particles (A) may be a plurality of types of diene-based rubbers, (meth) acrylate-based rubbers, or organosiloxane-based rubbers having different constituent units.
- the "elastic body" of the polymer particles (A) is composed of a plurality of types of elastic bodies having different constituent units of each is described.
- each of the plurality of types of elastic bodies is referred to as elastic body 1 , elastic body 2 , ..., And elastic body n .
- n is an integer of 2 or more.
- the "elastic body" of the polymer particles (A) may include a complex of an elastic body 1 , an elastic body 2 , ..., And an elastic body n , which are polymerized separately.
- the "elastic body" of the polymer particles (A) may include one elastic body obtained by polymerizing the elastic body 1 , the elastic body 2 , ..., And the elastic body n in order.
- Such polymerization of a plurality of elastic bodies (polymers) in order is also referred to as multi-stage polymerization.
- One elastic body obtained by multi-stage polymerization of a plurality of types of elastic bodies is also referred to as a multi-stage polymerization elastic body. The method for producing the multi-stage polymerized elastic body will be described in detail later.
- a multi-stage polymerized elastic body composed of elastic body 1 , elastic body 2 , ..., And elastic body n will be described.
- the elastic body n may cover at least a part of the elastic body n - 1, or may cover the entire elastic body n-1 .
- a part of the elastic body n may enter the inside of the elastic body n-1 .
- each of the plurality of elastic bodies may form a layered structure.
- the multi-stage polymerized elastic body is composed of the elastic body 1 , the elastic body 2 , and the elastic body 3 , the elastic body 1 forms the innermost layer, the layer of the elastic body 2 is formed on the outer side of the elastic body 1 , and further.
- An embodiment in which the layer of the elastic body 3 is formed as the outermost layer in the elastic body outside the layer of the elastic body 2 is also an aspect of the present invention.
- the multi-stage polymerized elastic body in which each of the plurality of elastic bodies forms a layered structure can be said to be a multi-layer elastic body.
- the "elastic body" of the polymer particles (A) is (a) a composite of a plurality of types of elastic bodies, (b) a multi-stage polymerized elastic body and / or (c) a multilayer elastic body. May include.
- the weight ratio of the elastic body / graft portion of the polymer particles (A) is preferably 65/35 to 92/8, preferably 68/32 to 91/9, from the viewpoint of workability of the resin composition. It is more preferably 70/30 to 90/10.
- the rubber-containing graft copolymer further has a surface crosslinked polymer in addition to the elastic body and the graft portion graft-bonded to the elastic body.
- the polymer particles (A) further have a surface crosslinked polymer in addition to the elastic body and the graft portion graft-bonded to the elastic body.
- the blocking resistance can be improved, and (b) the dispersibility of the polymer particles (A) in the matrix resin (B) becomes better.
- the reasons for these are not particularly limited, but can be presumed as follows: By covering at least a part of the elastic body with the surface crosslinked polymer, the exposure of the elastic body portion of the polymer particles (A) is reduced. As a result, the elastic bodies are less likely to stick to each other, and the dispersibility of the polymer particles (A) is improved.
- the polymer particles (A) When the polymer particles (A) have a surface crosslinked polymer, they may also have the following effects: (a) an effect of lowering the viscosity of the present resin composition, (b) an effect of increasing the crosslink density in the elastic body, and. (C) The effect of increasing the graft efficiency of the graft portion.
- Crosslink density in an elastic body is intended to be the degree of number of crosslinked structures in the entire elastic body.
- the structural unit derived from the polyfunctional monomer is 30 to 100% by weight, and the structural unit derived from other vinyl-based monomers is 0 to 70% by weight, for a total of 100. It consists of a polymer containing% by weight.
- Examples of the polyfunctional monomer that can be used for the polymerization of the surface crosslinked polymer include the same monomers as the above-mentioned polyfunctional monomer.
- examples of the polyfunctional monomer that can be preferably used for the polymerization of the surface crosslinked polymer include allyl methacrylate, ethylene glycol di (meth) acrylate, and butylene glycol di (meth) acrylate (for example).
- the polymer particles (A) may contain a surface crosslinked polymer polymerized independently of the polymerization of the rubber-containing graft copolymer, or the surface crosslinked polymer polymerized together with the rubber-containing graft copolymer. May include.
- the polymer particles (A) may be a multi-stage polymer obtained by multi-stage polymerization of an elastic body, a surface crosslinked polymer, and a graft portion in this order. In any of these embodiments, the surface crosslinked polymer may cover at least a portion of the elastic.
- the surface crosslinked polymer can also be regarded as a part of the elastic body.
- the surface crosslinked polymer can be regarded as a part of the rubber-containing graft copolymer, and can be said to be a surface crosslinked polymer.
- the graft portion may be graft-bonded to an elastic material other than (a) the surface crosslinked polymer, and may be graft-bonded to (b) the surface crosslinked polymer. It may be graft-bonded, or may be graft-bonded to both an elastic body other than the (c) surface-crosslinked polymer and a surface-crosslinked polymer.
- the volume average particle size of the elastic body described above is intended to be the volume average particle size of the elastic body containing the surface crosslinked polymer.
- the polymer particles (A) are multi-stage polymers obtained by multi-stage polymerization of an elastic body, a surface crosslinked polymer, and a graft portion in this order (case (4)) will be described.
- the surface crosslinked polymer may cover a part of the elastic body or the whole elastic body.
- a part of the surface crosslinked polymer may have entered the inside of the elastic body.
- the graft portion may cover a part of the surface crosslinked polymer or may cover the whole of the surface crosslinked polymer.
- a part of the graft portion may enter the inside of the surface crosslinked polymer.
- the elastic body, the surface crosslinked polymer and the graft portion may have a layered structure.
- the elastic body is the innermost layer (core layer)
- the surface crosslinked polymer layer is present as an intermediate layer on the outside of the elastic body
- the grafted layer is the outermost layer (shell layer) on the outside of the surface crosslinked polymer.
- the existing aspect is also one aspect of the present invention.
- the volume average particle diameter of the polymer particles (A) is not particularly limited, but is 0.03 ⁇ m or more from the viewpoint of industrial productivity and workability of the resin composition, that is, from the viewpoint that a resin composition having a low viscosity can be obtained. 50.00 ⁇ m is preferable, 0.05 ⁇ m to 10.00 ⁇ m is more preferable, 0.08 ⁇ m to 2.00 ⁇ m is more preferable, 0.10 ⁇ m to 1.00 ⁇ m is further preferable, and 0.10 ⁇ m to 0.80 ⁇ m is more preferable.
- the volume average particle size of the polymer particles is the volume average particle size (Mv) measured by using Microtrac UPA150 (manufactured by Nikkiso Co., Ltd.) for the latex of the polymer particles.
- the polymer particles (A) are dispersed in the resin composition in the form of primary particles.
- the polymer particles (A) are dispersed in the state of primary particles means that the polymer particles (A) are dispersed substantially independently (without contact).
- the dispersed state can be confirmed, for example, by dissolving a part of the resin composition in a solvent such as methyl ethyl ketone and measuring the particle size with a particle size measuring device or the like by laser light scattering.
- the value of the volume average particle diameter (Mv) / number average particle diameter (Mn) measured by the particle diameter measurement is not particularly limited, but is preferably 3.0 or less, more preferably 2.5 or less, and 2.0. The following is more preferable, and 1.5 or less is particularly preferable. If the volume average particle diameter (Mv) / number average particle diameter (Mn) is 3.0 or less, it is considered that the polymer particles (A) are well dispersed, and the impact resistance and adhesion of the obtained cured product are considered to be good. Physical properties such as sex are improved.
- the volume average particle diameter (Mv) / number average particle diameter (Mn) can be determined by measuring using Microtrac UPA (manufactured by Nikkiso Co., Ltd.) and dividing Mv by Mn.
- the number distribution of the volume average particle diameter of the polymer particles (A) in the matrix resin (B) is 0.5 times or more and 1 time or less of the volume average particle diameter because a resin composition having low viscosity and easy to handle can be obtained. It is preferable to have a half price range of.
- the polymer particles (A) can be produced by polymerizing an arbitrary polymer and then graft-polymerizing the polymer constituting the graft portion with respect to the polymer in the presence of the polymer.
- polymer particles (A) are produced by polymerizing an elastic body and then graft-polymerizing a polymer constituting a graft portion with respect to the elastic body in the presence of the elastic body will be described as an example.
- An example of the method for producing the polymer particles (A) will be described.
- the polymer particles (A) can be produced by a known method, for example, an emulsion polymerization method, a suspension polymerization method, a microsuspension polymerization method, or the like.
- the polymerization of the elastic body, the polymerization of the graft portion (graft polymerization), and the polymerization of the surface crosslinked polymer in the polymer particles (A) are known methods, for example, an emulsion polymerization method, a suspension polymerization method, and a micro. It can be carried out by a method such as a suspension polymerization method.
- the emulsion polymerization method is particularly preferable as the method for producing the polymer particles (A).
- the composition design of the polymer particles (A) is easy, (b) the industrial production of the polymer particles (A) is easy, and (c) suitable for the production of the present resin composition. It has the advantage that the latex containing the polymer particles (A) can be easily obtained.
- a method for producing an elastic body, a graft portion, and a surface crosslinked polymer having an arbitrary configuration, which may be contained in the polymer particles (A) will be described.
- the elastic body contains at least one selected from the group consisting of a diene-based rubber and a (meth) acrylate-based rubber.
- the elastic body can be produced by, for example, emulsion polymerization, suspension polymerization, microsuspension polymerization, or the like, and as the production method, for example, the method described in WO2005 / 028546 can be used. ..
- the elastic body contains organosiloxane-based rubber.
- the elastic body can be produced by, for example, emulsion polymerization, suspension polymerization, microsuspension polymerization, or the like, and as the production method, for example, the method described in WO2006 / 070664 can be used. ..
- the "elastic body" of the polymer particles (A) is composed of a plurality of types of elastic bodies (for example, elastic body 1 , elastic body 2 , ..., Elastic body n ) will be described.
- the elastic body 1 , the elastic body 2 , ..., The elastic body n are separately polymerized by the above-mentioned method, and then mixed and composited to form a composite composed of a plurality of types of elastic bodies. May be manufactured.
- the elastic body 1 , the elastic body 2 , ..., And the elastic body n may be polymerized in multiple stages in this order to produce one elastic body composed of a plurality of types of elastic bodies.
- the multi-stage polymerization of the elastic body will be specifically described. For example, by sequentially performing the steps (1) to (4) below, a multi-stage polymerized elastic body can be obtained: (1) elastic body 1 is polymerized to obtain elastic body 1 ; (2) then elasticity. The elastic body 2 is polymerized in the presence of the body 1 to obtain a two-stage elastic body 1 + 2 ; (3) Then, the elastic body 3 is polymerized in the presence of the elastic body 1 + 2 to obtain a three-stage elastic body 1 + 2 + 3 ; 4) Hereinafter, the same procedure is performed, and then the elastic body n is polymerized in the presence of the elastic body 1 + 2 + ... + (N-1) to obtain a multi-stage polymerized elastic body 1 + 2 + ... + N.
- the graft portion can be formed, for example, by polymerizing the monomer used for forming the graft portion by a known radical polymerization.
- a polymer particle precursor containing an elastic body and a surface crosslinked polymer is obtained as an aqueous suspension
- the polymerization of the graft portion is preferably carried out by an emulsion polymerization method.
- the graft portion can be manufactured, for example, according to the method described in WO2005 / 028546.
- a method for manufacturing a graft portion will be described when the graft portion is composed of a plurality of types of graft portions (for example, graft portion 1 , graft portion 2 , ..., Grab portion n ).
- the graft portion 1 , the graft portion 2 , ..., And the graft portion n are separately polymerized by the above-mentioned method, and then mixed and combined to form a graft portion composed of a plurality of types of graft portions. (Complex) may be produced.
- the graft portion 1 , the graft portion 2 , ..., And the graft portion n may be polymerized in multiple stages in this order to produce one graft portion composed of a plurality of types of graft portions.
- a multi-stage polymerization graft portion can be obtained: (1) the graft portion 1 is polymerized to obtain the graft portion 1 ; (2) then the graft. The graft portion 2 is polymerized in the presence of the portion 1 to obtain the two-stage graft portion 1 + 2 ; (3) Then, the graft portion 3 is polymerized in the presence of the graft portion 1 + 2 to obtain the three-stage graft portion 1 + 2 + 3 . 4) After the same procedure is performed below, the graft portion n is polymerized in the presence of the graft portion 1 + 2 + ... + (n-1) to obtain a multistage polymerization graft portion 1 + 2 + ... + N.
- the polymer particles (A) may be produced by polymerizing the graft portions having the plurality of types of graft portions and then graft-polymerizing the graft portions onto an elastic body. In the presence of the elastic body, the polymer particles (A) may be produced by sequentially performing multi-stage graft polymerization of a plurality of types of polymers constituting the graft portion on the elastic body.
- the surface crosslinked polymer can be formed by polymerizing the monomer used for forming the surface crosslinked polymer by a known radical polymerization.
- the elastic material is obtained as an aqueous suspension, it is preferable to carry out the polymerization of the surface crosslinked polymer by an emulsion polymerization method.
- a known emulsifier (dispersant) can be used for the production of the polymer particles (A).
- Examples of the emulsifier include anionic emulsifier, nonionic emulsifier, polyvinyl alcohol, alkyl-substituted cellulose, polyvinylpyrrolidone, polyacrylic acid derivative and the like.
- Examples of the anionic emulsifier include sulfur-based emulsifiers, phosphorus-based emulsifiers, sarcosic acid-based emulsifiers, and carboxylic acid-based emulsifiers.
- Examples of the sulfur-based emulsifier include sodium dodecylbenzenesulfonate (abbreviation; SDBS) and the like.
- Examples of the phosphorus-based emulsifier include polyoxyethylene lauryl ether sodium phosphate and the like.
- a pyrolysis-type initiator can be used for the production of the polymer particles (A).
- Known initiators include, for example, (a) 2,2'-azobisisobutyronitrile, and (b) peroxides such as organic peroxides and inorganic peroxides. Agents can be mentioned.
- the organic peroxide include t-butyl peroxyisopropyl carbonate, paramentan hydroperoxide, cumene hydroperoxide, dicumyl peroxide, t-butyl hydroperoxide, di-t-butyl peroxide, and t-.
- examples include hexyl peroxide.
- the inorganic peroxide include hydrogen peroxide, potassium persulfate, and ammonium persulfate.
- a redox-type initiator can also be used in the production of the polymer particles (A).
- the redox-type initiators include (a) peroxides such as organic peroxides and inorganic peroxides, (b) transition metal salts such as iron (II) sulfate, sodium formaldehyde sulfoxylate, and glucose. It is an initiator that is used in combination with a reducing agent. Further, a chelating agent such as ethylenediaminetetraacetic acid disodium may be used in combination as needed, and a phosphorus-containing compound such as sodium pyrophosphate may be used in combination as needed.
- a redox-type initiator When a redox-type initiator is used, the polymerization can be carried out even at a low temperature at which the peroxide does not substantially undergo thermal decomposition, and the polymerization temperature can be set in a wide range. Therefore, it is preferable to use a redox-type initiator.
- a redox-type initiator using an organic peroxide such as cumene hydroperoxide, dicumyl peroxide, paramentan hydroperoxide, and t-butyl hydroperoxide as a peroxide is preferable.
- the amount of the initiator used, and when the redox-type initiator is used, the amount of the reducing agent, transition metal salt, chelating agent, and the like can be used within a known range.
- chain transfer agents are known when polyfunctional monomers are used in the polymerization of elastics, grafts or surface crosslinked polymers for the purpose of introducing crosslinked structures into elastics, grafts or surface crosslinked polymers. It can be used within the range of the amount used. By using a chain transfer agent, the molecular weight and / or degree of cross-linking of the obtained elastic body, graft portion or surface cross-linked polymer can be easily adjusted.
- a surfactant can be further used in the production of the polymer particles (A).
- the types and amounts of the surfactants used are in the known range.
- Latex can be obtained by the above-mentioned method for producing polymer particles (A). That is, the description in the section (2-2. Method for producing polymer particles (A)) can be incorporated as a description regarding a method for producing latex.
- thermosetting resin As the matrix resin (B), a thermosetting resin can be preferably used.
- the thermosetting resin is at least one selected from the group consisting of a resin containing a polymer obtained by polymerizing an ethylenically unsaturated monomer, an epoxy resin, a phenol resin, a polyol resin and an amino-formaldehyde resin (melamine resin). It preferably contains a kind of thermosetting resin. Further, examples of the thermosetting resin include a resin containing a polymer obtained by polymerizing an aromatic polyester raw material.
- aromatic polyester raw material examples include radically polymerizable monomers such as aromatic vinyl compounds, (meth) acrylic acid derivatives, vinyl cyanide compounds, and maleimide compounds, dimethyl terephthalates, and alkylene glycols. Only one type of these thermosetting resins may be used, or two or more types may be used in combination.
- the ethylenically unsaturated monomer is not particularly limited as long as it has at least one ethylenically unsaturated bond in the molecule.
- Examples of the ethylenically unsaturated monomer include acrylic acid, ⁇ -alkylacrylic acid, ⁇ -alkylacrylic acid ester, ⁇ -alkylacrylic acid, ⁇ -alkylacrylic acid ester, methacrylic acid, acrylic acid ester, and methacrylic acid.
- Examples thereof include esters, vinyl acetate, vinyl esters, unsaturated esters, polyunsaturated carboxylic acids, polyunsaturated esters, maleic acid, maleic acid esters, maleic anhydride and acetoxystyrene. Only one type of these may be used, or two or more types may be used in combination.
- epoxy resin is not particularly limited as long as it has at least one epoxy bond in the molecule.
- the epoxy resin examples include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol AD type epoxy resin, bisphenol S type epoxy resin, glycidyl ester type epoxy resin, glycidylamine type epoxy resin, novolak type epoxy resin, and the like.
- Flame-retardant epoxy resin p-oxybenzoate glycidyl ether ester type epoxy resin, m-aminophenol type epoxy resin, diaminodiphenylmethane-based epoxy resin, urethane-modified epoxy resin with urethane bond, various alicyclic epoxy resins, multivalent Examples thereof include glycidyl ethers of alcohols, hydride-in type epoxy resins, epoxies of unsaturated polymers such as petroleum resins, and aminoglycidyl ether resins containing aminoglycidyl.
- Examples of the polyhydric alcohol include N, N-diglycidyl aniline, N, N-diglycidyl-o-toluidine, triglycidyl isocyanurate, polyalkylene glycol diglycidyl ether, and glycerin.
- Examples of the epoxy resin include an epoxy compound obtained by subjecting the epoxy resin to an addition reaction of bisphenol A (or F), polybasic acids, or the like. The epoxy resin is not limited to these, and commonly used epoxy resins can be used. Only one type of these epoxy resins may be used, or two or more types may be used in combination.
- epoxy resins those having at least two epoxy groups in one molecule have high reactivity in curing the resin composition, and the obtained cured product easily forms a three-dimensional network.
- the epoxy resin a bisphenol type epoxy resin as a main component is preferable among the epoxy resins having at least two epoxy groups in one molecule because they are excellent in economy and availability.
- the phenol resin is not particularly limited as long as it is a compound obtained by reacting phenols with aldehydes.
- the phenols are not particularly limited, and examples thereof include phenols such as phenol, orthocresol, metacresol, paracresol, xylenol, paratertiary butylphenol, paraoctylphenol, paraphenylphenol, bisphenol A, bisphenol F, and resorcin. Will be.
- Particularly preferred phenols include phenol and cresol.
- the aldehydes are not particularly limited, and examples thereof include formaldehyde, acetaldehyde, butyraldehyde, acrolein, and the like, and mixtures thereof.
- As the aldehydes a substance that is a source of the above-mentioned aldehydes or a solution of these aldehydes can also be used.
- formaldehyde is preferable because it is easy to operate when the phenols and the aldehydes are reacted.
- the molar ratio (F / P) (hereinafter, also referred to as reaction molar ratio) between the phenols (P) and the aldehydes (F) when the phenols and the aldehydes are reacted is not particularly limited.
- the reaction molar ratio (F / P) is preferably 0.4 to 1.0, more preferably 0.5 to 0.8.
- the reaction molar ratio (F / P) is preferably 0.4 to 4.0, more preferably 0.8 to 2.5.
- the reaction molar ratio is not more than the upper limit value
- the molecular weight of the phenol resin does not become too large and the softening point does not become too high, so that sufficient fluidity can be obtained at the time of heating.
- the reaction molar ratio is not more than the upper limit, the molecular weight can be easily controlled, and there is no possibility of gelation or partial gelation due to the reaction conditions.
- the polyol resin is a compound having two or more active hydrogens at the terminals, and is a bifunctional or higher polyol having a molecular weight of about 50 to 20,000.
- Examples of the polyol resin include aliphatic alcohols, aromatic alcohols, polyether-type polyols, polyester-type polyols, polyolefin polyols, and acrylic polyols.
- the aliphatic alcohol may be either a dihydric alcohol or a trihydric or higher alcohol (trihydric alcohol, tetrahydric alcohol, etc.).
- dihydric alcohol include ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and 3-methyl.
- alkylene glycols such as -1,5-pentanediol and neopentyl glycol (particularly alkylene glycols having about 1 to 6 carbon atoms) and two or more molecules (for example, about 2 to 6 molecules) of the alkylene glycols.
- alkylene glycols such as -1,5-pentanediol and neopentyl glycol (particularly alkylene glycols having about 1 to 6 carbon atoms) and two or more molecules (for example, about 2 to 6 molecules) of the alkylene glycols.
- examples thereof include condensates (diethylene glycol, dipropylene glycol, tripropylene glycol, etc.).
- trihydric alcohol include glycerin, trimethylolpropane, trimethylolethane, 1,2,6-hexanetriol and the like (particularly, trihydric alcohol having about 3 to 10 carbon atoms).
- tetrahydric alcohol include pentaerythr
- aromatic alcohols include bisphenols such as bisphenol A and bisphenol F; biphenyls such as dihydroxybiphenyl; polyhydric phenols such as hydroquinone and phenolformaldehyde condensates; naphthalenediol and the like.
- polyether type polyol for example, a random copolymer obtained by ring-opening polymerization of ethylene oxide, propylene oxide, butylene oxide, styrene oxide and the like in the presence of one or more kinds of initiators containing active hydrogen.
- examples include coalesced or block copolymers, and mixtures of these copolymers.
- Examples of the active hydrogen-containing initiator used for ring-opening polymerization of polyether-type polyols include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-butanediol, 1,4-butanediol, and 1, Diols such as 6-hexanediol, neopentyl glycol, bisphenol A; triols such as trimethylolethane, trimethylolpropane, glycerin; saccharides such as monosaccharides, oligosaccharides, polysaccharides; sorbitol; ammonia, ethylenediamine, urea, monomethyl Amines such as diethanolamine and monoethyldiethanolamine; and the like.
- polyester-type polyol examples include (a) polybasic acids such as maleic acid, fumaric acid, adipic acid, sebacic acid, phthalic acid, dodecanedioic acid, isophthalic acid, and azelaic acid and / or acid anhydrides thereof, and (b). ) Polyhydric alcohols such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, diethylene glycol, dipropylene glycol, neopentyl glycol, 3-methyl-1,5-pentanediol, etc. Examples thereof include polymers obtained by polycondensation in the temperature range of 150 to 270 ° C.
- polyester-type polyol examples include ring-opening polymers such as ⁇ -caprolactone and valerolactone, and (b) active hydrogen compounds having two or more active hydrogens such as polycarbonate diol and castor oil. Be done.
- polystyrene-type polyol examples include polybutadiene polyols, polyisoprene polyols, and hydrogenated products thereof.
- acrylic polyol examples include (a) hydroxyl group-containing monomers such as hydroxyethyl (meth) acrylate, hydroxybutyl (meth) acrylate, and vinylphenol, and (b) n-butyl (meth) acrylate and 2-ethylhexyl. Examples thereof include a copolymer with a general-purpose monomer such as (meth) acrylate, and a mixture of these copolymers.
- a polyether-type polyol is preferable because the obtained resin composition has a low viscosity and is excellent in workability, and the resin composition can provide a cured product having an excellent balance between hardness and toughness. Further, among these polyol resins, polyester-type polyols are preferable because the obtained resin composition can provide a cured product having excellent adhesiveness.
- the amino-formaldehyde resin is not particularly limited as long as it is a compound obtained by reacting an amino compound with aldehydes under an alkaline catalyst.
- the amino compound include melamine; 6-substituted guanamines such as guanamine, acetoguanamine, and benzoguanamine; CTU guanamine (3,9-bis [2- (3,5-diamino-2,4,6-triazaphenyl)).
- the amino compound a substituted melamine compound in which the hydrogen of the amino group of melamine is substituted with an alkyl group, an alkenyl group, and / or a phenyl group (US Patent No.
- amino compound only one kind may be used, or two or more kinds may be used in combination. Further, in addition to these amino compounds, (a) phenols such as phenol, cresol, alkylphenol, resorcin, hydroquinone, and pyrogallol, and (b) aniline may be additionally used.
- phenols such as phenol, cresol, alkylphenol, resorcin, hydroquinone, and pyrogallol
- aniline may be additionally used.
- aldehydes examples include formaldehyde, paraformaldehyde, acetaldehyde, benzaldehyde, furfural and the like.
- formaldehyde and paraformaldehyde are preferable because they are inexpensive and have good reactivity with the above-mentioned amino compounds.
- the aldehydes are preferably 1.1 to 6.0 mol per effective aldehyde group per 1 mol of the amino compound, and 1.2 to 4.0 mol is used. Is particularly preferred.
- the matrix resin (B) is particularly preferably an epoxy resin.
- the properties of the matrix resin (B) are not particularly limited.
- the matrix resin (B) preferably has a viscosity of 100 mPa ⁇ s to 1,000,000 mPa ⁇ s at 25 ° C.
- the viscosity of the matrix resin (B) is more preferably 50,000 mPa ⁇ s or less, further preferably 30,000 mPa ⁇ s or less, and particularly preferably 15,000 mPa ⁇ s or less at 25 ° C. preferable.
- the matrix resin (B) has an advantage of being excellent in fluidity. It can be said that the matrix resin (B) having a viscosity of 100 mPa ⁇ s to 1,000,000 mPa ⁇ s at 25 ° C. is a liquid.
- the polymer particles (A) having the above-mentioned constitution are good in the matrix resin (B) having a viscosity of 1,000,000 mPa ⁇ s or less at 25 ° C. Has the advantage of being dispersed in.
- the viscosity of the matrix resin (B) is 100 mPa ⁇ s or more at 25 ° C. because the matrix resin (B) can be prevented from being fused to each other by the matrix resin (B) entering the polymer particles (A). It is more preferably 500 mPa ⁇ s or more, further preferably 1000 mPa ⁇ s or more, and particularly preferably 1500 mPa ⁇ s or more.
- the matrix resin (B) may have a viscosity higher than 1,000,000 mPa ⁇ s.
- the matrix resin (B) may be a semi-solid (semi-liquid) or a solid.
- the obtained resin composition has an advantage that it is less sticky and easy to handle.
- the matrix resin (B) preferably has an endothermic peak of 25 ° C. or lower, and more preferably 0 ° C. or lower, in the thermogram of differential thermal scanning calorimetry (DSC). According to the above configuration, the matrix resin (B) has an advantage of being excellent in fluidity.
- the mixing ratio of the polymer particles (A) and the matrix resin (B) is 20% by weight or more for the polymer particles (A) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight.
- the matrix resin (B) is preferably 80% by weight or less.
- the polymer particles (A) are 20% by weight or more and 50% by weight or less when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight.
- the matrix resin (B) is preferably 50% by weight or more and 80% by weight or less, the polymer particles (A) are more preferably 30% by weight or more and 50% by weight or less, and the matrix resin (B) is It is more preferably 50% by weight or more and 70% by weight or less, the polymer particles (A) are more preferably 35% by weight or more and 50% by weight or less, and the matrix resin (B) is 50% by weight or more and 65% by weight or less.
- the polymer particles (A) are 40% by weight or more and 50% by weight or less, and the matrix resin (B) is further preferably 50% by weight or more and 60% by weight or less, and the polymer.
- the particle (A) is particularly preferably 40% by weight, and the matrix resin (B) is particularly preferably 60% by weight.
- the total of the polymer particles (A) and the matrix resin (B) is 100% by weight in the resin composition.
- the polymer particles (A) are preferably 1% by weight or more and 20% by weight or less
- the matrix resin (B) is preferably 80% by weight or more and 99% by weight or less
- the polymer particles (A). Is more preferably 1% by weight or more and 16% by weight or less
- the matrix resin (B) is more preferably 84% by weight or more and 99% by weight or less
- the polymer particles (A) are 1% by weight or more and 12% by weight or less. It is more preferably 8% by weight or more and 99% by weight or less of the matrix resin (B).
- the present resin composition may contain other optional components other than the above-mentioned components, if necessary.
- Other optional ingredients include inorganic fillers, organic fillers, blocking inhibitors, hardeners, colorants such as pigments and dyes, extender pigments, UV absorbers, antioxidants, heat stabilizers (antigelling agents). ), Plasticizers, leveling agents, defoaming agents, silane coupling agents, antistatic agents, flame retardant agents, lubricants, slimming agents, low shrinkage agents, desiccants, dispersants and the like.
- optional components can be appropriately added in any step in the method for producing the present resin composition.
- other optional components can be added to the aqueous suspension before or after the polymer particles (A) solidify, or can be added to the present resin composition.
- the present resin composition may contain an inorganic filler. Since the present resin composition does not have a functional group that reacts with the inorganic filler, it is possible to realize low viscosity even when the inorganic filler is contained.
- Inorganic fillers include silicic acid, silicate, dolomite, reinforcing filler, calcium oxide, calcium carbonate, magnesium carbonate, titanium oxide, ferrous oxide, aluminum hydroxide, fine aluminum powder, zinc oxide, active zinc. Hana etc. can be mentioned.
- the present resin composition contains an inorganic filler, it has an advantage of being excellent in economy, and has an advantage that a cured product obtained from the resin composition is excellent in strength and flame retardancy.
- Examples of silicic acid include wet silica and dry silica.
- the dry silica is also referred to as fumed silica.
- the dry silica includes hydrophilic fumed silica having no surface treatment and hydrophobic fumed silica produced by chemically treating the silanol group portion of the hydrophilic fumed silica with silane and / or siloxane. Can be mentioned.
- hydrophilic fumed silica is preferable because it is excellent in workability, (b) it is excellent in dispersibility in the matrix resin (B), and the obtained resin composition has excellent storage stability.
- Hydrophobic fumed silica is preferred because of its superiority.
- Examples of the method for producing dry silica include (a) Aerosil method produced by decomposing silicon halide, and (b) Arc method in which silica sand is heated and reduced and then oxidized with air to obtain silicic acid.
- the Aerosil method is preferable from the viewpoint of availability.
- Examples of the surface treatment agent for hydrophobic fumed silica include silane coupling agents, octamethyltetracyclosiloxane, polydimethylsiloxane, and the like.
- Examples of the silane coupling agent include dimethyldichlorosilane, (meth) acrylic silane, hexamethyldisilazane, octylsilane, hexadecylsilane, aminosilane, and methacrylicsilane.
- Hydrophobic fumed silica surface-treated with polydimethylsiloxane is preferable because it is excellent in dispersion stability in the matrix resin (B) and storage stability of the obtained resin composition.
- the viscosity of the resin composition depends on the shear rate.
- silicate examples include aluminum silicate, magnesium silicate, calcium silicate, wollastonite, talc, and the like.
- Examples of calcium carbonate include heavy calcium carbonate and colloidal calcium carbonate.
- Glue calcium carbonate can generally be produced by reacting carbon dioxide gas with lime milk formed by adding water to quick lime.
- Calcium carbonate is a uniform particle of calcium carbonate and is sometimes referred to as "precipitated calcium carbonate", “colloidal calcium carbonate” or “synthetic calcium carbonate”.
- the inorganic filler contains calcium carbonate.
- the inorganic filler is surface-treated with a surface treatment agent.
- the surface treatment improves the dispersibility of the inorganic filler in the resin composition, and as a result, the various physical properties of the obtained cured product are improved.
- Examples of the surface treatment agent for the inorganic filler include fatty acids such as saturated fatty acids and unsaturated fatty acids, resin acids, and silane coupling agents.
- the content of the inorganic filler in 100% by weight of the resin composition is preferably 0.1% by weight to 60.0% by weight, more preferably 0.5% by weight to 55.0% by weight. , 1.0% by weight to 50.0% by weight is more preferable.
- the resin composition can provide a cured product having excellent adhesiveness.
- the content of the inorganic filler in 100% by weight of the resin composition is 60.0% by weight or less, the deterioration of the physical properties of elongation due to the inorganic filler is not remarkable, and the resin composition has the physical properties of elongation. It can provide an excellent cured product.
- the content of the inorganic filler in 100% by weight of the resin composition may be 0.1% by weight to 15.0% by weight, 0.5% by weight to 10.0% by weight, and may be. It may be 1.0% by weight to 5.0% by weight.
- the inorganic filler may be used alone or in combination of two or more.
- the present resin composition may contain calcium oxide as an inorganic filler.
- the calcium oxide removes water from the resin composition by reacting with water in the resin composition, and various physical properties caused by the presence of water are present. Can solve the problem.
- Calcium oxide functions as, for example, an antifoaming agent due to water removal, and can suppress a decrease in the adhesive strength of the obtained cured product.
- Calcium oxide can be surface treated with a surface treatment agent.
- the surface treatment improves the dispersibility of calcium oxide in the resin composition.
- the surface-treated calcium oxide can significantly improve the T-shaped peeling adhesiveness and the impact-resistant peeling adhesiveness of the obtained cured product.
- the surface treatment agent that can be used for the surface treatment of calcium oxide is not particularly limited, but fatty acids are preferable.
- the content of calcium oxide in the resin composition is preferably 0.1 part by weight to 10 parts by weight with respect to 100 parts by weight of the matrix resin (B). 0.2 to 5 parts by weight is more preferable, 0.5 part by weight to 3 parts by weight is further preferable, and 1 part by weight to 2 parts by weight is particularly preferable.
- the content of calcium oxide is (a) 0.1 part by weight or more with respect to 100 parts by weight of the matrix resin (B), the water removing effect is sufficient, and (b) when it is 10 parts by weight or less. There is no risk that the strength of the obtained cured product will decrease.
- Calcium oxide may be used alone or in combination of two or more.
- This resin composition can use a dehydrating agent other than calcium oxide.
- dehydrating agent other than calcium oxide include various compounds described in paragraph [0155] of the specification of WO2014-196607.
- the present resin composition may contain aluminum hydroxide as an inorganic filler.
- Aluminum hydroxide is a white powder crystal represented by a chemical formula of Al (OH) 3 or Al 2 O 3.3H 2 O, and is generally produced by the Bayer process using bauxite as a raw material.
- Al hydroxide there are products having various average particle sizes depending on the classification.
- the content of aluminum hydroxide in the resin composition is preferably 55% by weight or more and 85% by weight or less with respect to 100% by weight of the resin composition. ..
- the obtained cured product has the advantages of excellent thermal conductivity and flame retardancy.
- the present resin composition has an advantage that the viscosity is low and therefore the handling property is excellent.
- the resin composition when the resin composition does not contain an inorganic filler, and the viscosity of the resin composition at 50 ° C. is 20,900 mPa ⁇ s or less, the resin composition (containing an inorganic filler). (No) is judged to have low viscosity and excellent handleability.
- "viscosity of the resin composition at X ° C.” is intended to be “viscosity of the resin composition at X ° C.”.
- the resin composition is preferably 20,900 mPa ⁇ s or less, more preferably 20,500 mPa ⁇ s or less, 20, It is more preferably 000 mPa ⁇ s or less, more preferably 18,000 mPa ⁇ s or less, more preferably 15,000 mPa ⁇ s or less, and even more preferably 14,000 mPa ⁇ s or less. It is more preferably 13,000 mPa ⁇ s or less, further preferably 12,000 mPa ⁇ s or less, and particularly preferably 11,000 mPa ⁇ s or less. According to this structure, the resin composition also has an advantage of excellent fluidity.
- This resin composition has an advantage of being excellent in handleability even when it further contains an inorganic filler.
- the resin composition when the resin composition further contains an inorganic filler, if the viscosity of the resin composition at 25 ° C. is 280,000 mPa ⁇ s or less, the resin composition (including the inorganic filler). ) Has a low viscosity and is judged to have excellent handleability.
- the viscosity of the resin composition at 25 ° C. is preferably 280,000 mPa ⁇ s or less, more preferably 250,000 mPa ⁇ s or less, 230.
- the resin composition also has an advantage of excellent fluidity.
- This resin composition has an advantage that it is excellent in handleability even when the concentration of the polymer particles (A) in the resin composition is high (for example, 20% by weight or more).
- the content of the polymer particles (A) in the resin composition is 20% by weight or more in the total of 100% by weight of the polymer particles (A) and the matrix resin (B), and the resin composition is inorganically filled.
- the case where the material is not included (case (5)) will be described.
- the viscosity of the resin composition at 50 ° C. is 20,900 mPa ⁇ s or less, it is determined that the resin composition (not including the inorganic filler) has a low viscosity and is excellent in handleability.
- the viscosity of the resin composition at 50 ° C. is preferably 20,900 mPa ⁇ s or less, more preferably 20,500 mPa ⁇ s or less, and more preferably 20,000 mPa ⁇ s or less. More preferably, it is 18,000 mPa ⁇ s or less, more preferably 15,000 mPa ⁇ s or less, more preferably 14,000 mPa ⁇ s or less, and 13,000 mPa ⁇ s or less. It is more preferably 12,000 mPa ⁇ s or less, and particularly preferably 11,000 mPa ⁇ s or less. According to this structure, the resin composition also has an advantage of excellent fluidity.
- This resin composition has an advantage that it is excellent in handleability even if the concentration of the polymer particles (A) in the resin composition is further high (for example, 40% by weight or more).
- the content of the polymer particles (A) in the resin composition is 40% by weight or more in the total of 100% by weight of the polymer particles (A) and the matrix resin (B), and the resin composition is inorganically filled.
- the case where the material is not included (case (6)) will be described.
- the viscosity of the resin composition at 50 ° C. is 20,900 mPa ⁇ s or less, it is determined that the resin composition (not including the inorganic filler) has a low viscosity and is excellent in handleability.
- the viscosity of the resin composition at 50 ° C. is preferably 20,900 mPa ⁇ s or less, more preferably 20,500 mPa ⁇ s or less, and more preferably 20,000 mPa ⁇ s or less. More preferably, it is 18,000 mPa ⁇ s or less, more preferably 15,000 mPa ⁇ s or less, more preferably 14,000 mPa ⁇ s or less, and 13,000 mPa ⁇ s or less. It is more preferably 12,000 mPa ⁇ s or less, and particularly preferably 11,000 mPa ⁇ s or less. According to this structure, the resin composition also has an advantage of excellent fluidity.
- the present resin composition is preferably a composition in which the polymer particles (A) are dispersed in the matrix resin (B) in the state of primary particles.
- a method for obtaining a composition in which the polymer particles (A) are dispersed in the matrix resin (B) in the state of primary particles that is, a method for producing the present resin composition
- various methods are available. Available.
- a method for producing the present resin composition for example, (i) a method of contacting the polymer particles (A) obtained in an aqueous latex state with the matrix resin (B) and then removing unnecessary components such as water.
- the polymer particles (A) obtained in an aqueous latex state are once extracted into an organic solvent, and then the organic solvent solution of the obtained polymer particles (A) and the matrix resin (B) are mixed, and then the organic solvent is applied.
- the method of removing, etc. may be mentioned.
- As a method for producing the present resin composition it is preferable to use the method described in International Publication No. 2005/08546.
- the specific production method is as follows, in order, (i) an aqueous latex containing the polymer particles (A) (specifically, a reaction mixture after producing the polymer particles (A) by emulsification polymerization) in water at 20 ° C.
- the present resin composition is preferably prepared by a production method including the above-mentioned first step, second step and third step.
- the matrix resin (B) is preferably liquid at 23 ° C. because the third step is facilitated. "The matrix resin (B) is liquid at 23 ° C.” means that the softening point of the matrix resin (B) is 23 ° C. or lower, and the matrix resin (B) exhibits fluidity at 23 ° C. Means that
- the cured product according to the embodiment of the present invention is [2.
- Resin composition] is a cured resin composition described in the section. In the present specification, "the cured product according to one embodiment of the present invention” may be simply referred to as “the present cured product”.
- this cured product has the above-mentioned structure, rust is unlikely to occur even when it is cured after being applied to a metal plate or the like. Further, (a) the surface is beautiful, (b) it has high rigidity and high elastic modulus, and (c) it is excellent in toughness and adhesiveness.
- the above-mentioned resin composition can be used for various purposes, and those uses are not particularly limited.
- the resin composition and the like are, for example, an adhesive, a coating material, a binder for reinforcing fibers, a composite material, a modeling material for a 3D printer, a sealing agent, an electronic substrate, an ink binder, a wood chip binder, a rubber chip binder, and a foam. It is preferably used in applications such as chip binders, binders for castings, bedrock binders for flooring and ceramics, and urethane foams.
- the adhesive include a one-component adhesive and a two-component adhesive. When the present resin composition is used as an adhesive, an epoxy curing agent may be used.
- epoxy curing agent various epoxy curing agents can be used.
- the epoxy curing agent include aromatic amines.
- urethane foam include automobile seats, automobile interior parts, sound absorbing materials, vibration damping materials, shock absorbers (shock absorbers), heat insulating materials, construction floor material cushions, and the like.
- this resin composition is more preferably used as an adhesive, a coating material, a binder for reinforcing fibers, a composite material, a modeling material for a 3D printer, a sealing agent, and an electronic substrate.
- One embodiment of the present invention may have the following configuration.
- the polymer particles (A) have a graft portion and have a graft portion.
- the graft portion is (I) (ia) Does not contain a structural unit containing an aromatic group, or (i-b) In 100% by weight of the graft portion, the structural unit containing an aromatic group is more than 0% by weight and 10% by weight or less.
- It is a polymer and A resin composition having a glass transition temperature of the graft portion of ⁇ 25 ° C. or higher and 18 ° C. or lower.
- the polymer particles (A) have a graft portion and have a graft portion.
- the graft portion is based on 100% by weight of the graft portion.
- (I) (ia) does not contain a structural unit containing an aromatic group, or (i-b) contains a structural unit containing an aromatic group in an amount of more than 0% by weight and 10% by weight or less.
- the glass transition temperature of the graft portion is -25 ° C or higher and 18 ° C or lower.
- the polymer particles (A) are 20% by weight or more and 50% by weight or less
- the matrix resin (B) is A resin composition having an amount of 50% by weight or more and 80% by weight or less.
- the graft portion contains 20% by weight or more of structural units derived from the monomer providing the homopolymer having a glass transition temperature of 0 ° C. or lower in 100% by weight of the graft portion.
- the polymer particles (A) are 40% by weight or more and 50% by weight or less.
- One embodiment of the present invention may have the following configuration.
- the polymer particles (A) have a graft portion and have a graft portion.
- the graft portion is (I) (ia) Does not contain a structural unit containing an aromatic group, or (i-b) In 100% by weight of the graft portion, the structural unit containing an aromatic group is more than 0% by weight and 10% by weight or less.
- It is a polymer and A resin composition having a glass transition temperature of the graft portion of ⁇ 25 ° C. or higher and 18 ° C. or lower.
- the polymer particles (A) have a graft portion and have a graft portion.
- the graft portion is based on 100% by weight of the graft portion.
- (I) (ia) does not contain a structural unit containing an aromatic group, or (i-b) contains a structural unit containing an aromatic group in an amount of more than 0% by weight and 10% by weight or less.
- the glass transition temperature of the graft portion is -25 ° C or higher and 18 ° C or lower.
- the polymer particles (A) and the matrix resin (B) are 100% by weight, the polymer particles (A) are 20% by weight or more and 50% by weight or less, and the matrix resin (B) is A resin composition having an amount of 50% by weight or more and 80% by weight or less.
- the graft portion contains 20% by weight or more of structural units derived from the monomer providing the homopolymer having a glass transition temperature of 0 ° C. or lower in 100% by weight of the graft portion.
- the resin composition according to any one of [Y6].
- the polymer particles (A) are 40% by weight or more and 50% by weight or less.
- volume average particle diameter (Mv) of (a) the elastic body dispersed in the aqueous suspension and (b) the polymer particles (A) dispersed in the latex is Nanotrac WaveII-EX150 (manufactured by Microtrac Bell Co., Ltd.). ) was used for measurement. An aqueous suspension or latex diluted with deionized water was used as a measurement sample. For the measurement, input the refractive index of water and the elastic body or polymer particle (A) obtained in each production example, and adjust the sample concentration so that the measurement time is 120 seconds and the loading index is within the range of 1 to 20. I went there.
- ⁇ Viscosity measurement> The viscosity of the liquid epoxy resin (JER828 manufactured by Mitsubishi Chemical Corporation, JER828), which is the matrix resin (B) used in the following examples and comparative examples, or the obtained resin composition was measured.
- the device used was a digital viscometer DV-II + Pro type manufactured by BROOKFIELD. Further, the viscosity was measured by using the spindle CPE-52 depending on the viscosity region and changing the shear rate (shear rate) as necessary at a measurement temperature of 25 ° C. or 50 ° C. As a result, the viscosity of the liquid epoxy resin as the matrix resin (B) was 12,000 mPa ⁇ s.
- Tg of graft part was calculated according to the above-mentioned formula 1 using the Tg value of the homopolymer of the following monomer.
- Methyl methacrylate 105 ° C Ethyl acrylate (EA) -20 ° C n-Butyl acrylate (BA) -54 ° C Methyl acrylate (MA) 8 ° C Glycidyl methacrylate (GMA) 46 ° C Styrene (St) 80 ° C 4-Hydroxybutyl acrylate (4HBA) -40 ° C 2-Methoxyethyl methacrylate (MEMA) 16 ° C. 1. 1.
- the polymerization was completed by volatilizing under reduced pressure to remove the residual monomer that was not used in the polymerization.
- PHP, EDTA and ferrous sulfate heptahydrate, respectively were added into the pressure resistant polymerizer in any amount and at any time.
- an aqueous suspension (R-1) containing an elastic body containing polybutadiene rubber as a main component was obtained.
- the volume average particle size of the elastic body contained in the obtained aqueous suspension (R-1) was 90 nm.
- the aqueous suspension (R-1) obtained above has a solid content. 7 parts by weight, 200 parts by weight of deionized water, 0.03 part by weight of tripotassium phosphate, 0.002 part by weight of EDTA, and 0.001 part by weight of ferrous sulfate heptahydrate were added. Next, oxygen was sufficiently removed from the inside of the pressure-resistant polymerizer by replacing the gas inside the pressure-resistant polymerizer with nitrogen while stirring the charged raw materials.
- an aqueous suspension (R-2) containing an elastic body containing polybutadiene rubber as a main component was obtained.
- the volume average particle size of the elastic body contained in the obtained aqueous suspension (R-2) was 195 nm.
- Production Example 1-3 Preparation of aqueous suspension (R-3) containing an elastic body containing polybutadiene rubber as a main component 200 parts by weight of deionized water and 0.03 parts by weight of tripotassium phosphate in a pressure resistant polymerizer. , 0.002 parts by weight of ethylenediaminetetraacetic acid disodium (EDTA), 0.001 parts by weight of ferrous sulfate heptahydrate, and 0.15 parts by weight of sodium dodecylbenzenesulfonate (SDBS) as an emulsifier. Next, oxygen was sufficiently removed from the inside of the pressure-resistant polymerizer by replacing the gas inside the pressure-resistant polymerizer with nitrogen while stirring the charged raw materials.
- EDTA ethylenediaminetetraacetic acid disodium
- SDBS sodium dodecylbenzenesulfonate
- aqueous suspension (R-3) containing an elastic body containing polybutadiene rubber as a main component was obtained.
- the volume average particle size of the elastic body contained in the obtained aqueous suspension (R-3) was 120 nm.
- a monomer for forming the graft portion (hereinafter, also referred to as a graft monomer) (6.0 parts by weight of n-butyl acrylate (BA), 5.2 parts by weight of methyl acrylate (MA), and glycidyl methacrylate (GMA)).
- BA n-butyl acrylate
- MA methyl acrylate
- GMA glycidyl methacrylate
- BHP t-butyl hydroperoxide
- a latex (L-1) containing the polymer particles (A) and an emulsifier was obtained.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-1) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-1) was 30% by weight with respect to 100% by weight of the latex (L-1).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Production Example 2-2 Preparation of Latex (L-2) Containing Polymer Particles (A)
- Production Example 2-1 as a graft monomer, 9.2 parts by weight of ethyl acrylate (EA), n-butyl acrylate (BA).
- Latex (L-2) was obtained in the same manner as in Production Example 2-1 except that 2.0 parts by weight and 1.8 parts by weight of glycidyl methacrylate (GMA) were used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-2) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-2) was 30% by weight with respect to 100% by weight of the latex (L-2).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Latex (L-3) Containing Polymer Particles (A)
- EA ethyl acrylate
- GMA glycidyl methacrylate
- Latex (L-3) was obtained in the same manner as in Production Example 2-1 except that 8 parts by weight was used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-3) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-3) was 30% by weight with respect to 100% by weight of the latex (L-3).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Production Example 2-4 Preparation of Latex (L-4) Containing Polymer Particles (A)
- Production Example 2-1 as graft monomer, 4.0 parts by weight of n-butyl acrylate (BA), methyl acrylate (MA).
- Latex (L-4) was obtained in the same manner as in Production Example 2-1 except that 7.2 parts by weight and 1.8 parts by weight of glycidyl methacrylate (GMA) were used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-4) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-4) was 30% by weight with respect to 100% by weight of the latex (L-4).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Latex (L-5) Containing Polymer Particles (A)
- Production Example 2-1 as graft monomers, 11.2 parts by weight of methyl acrylate (MA) and glycidyl methacrylate (GMA) 1.
- Latex (L-5) was obtained in the same manner as in Production Example 2-1 except that 8 parts by weight was used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-5) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-5) was 30% by weight with respect to 100% by weight of the latex (L-5).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Latex (L-6) Containing Polymer Particles (A)
- Production Example 2-1 as a graft monomer, 6.2 parts by weight of methyl methacrylate (MMA), n-butyl acrylate (BA).
- Latex (L-6) was obtained in the same manner as in Production Example 2-1 except that 5.0 parts by weight and 1.8 parts by weight of glycidyl methacrylate (GMA) were used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-6) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-6) was 30% by weight with respect to 100% by weight of the latex (L-6).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Production Example 2-7 Preparation of Latex (L-7) Containing Polymer Particles (A)
- Production Example 2-1 as a graft monomer, 6.0 parts by weight of n-butyl acrylate (BA), methyl acrylate (MA).
- Latex (L-7) was obtained in the same manner as in Production Example 2-1 except that 4.0 parts by weight and 3.0 parts by weight of glycidyl methacrylate (GMA) were used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-7) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-7) was 30% by weight with respect to 100% by weight of the latex (L-7).
- the graft portion of the polymer particles (A) contained 23% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Latex (L-8) Containing Polymer Particles (A) In Production Example 2-6, except that (R-3) was used as an elastic body containing polybutadiene rubber as a main component.
- Latex (L-8) was obtained in the same manner as in Production Example 2-6.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-8) was 130 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-8) was 30% by weight with respect to 100% by weight of the latex (L-8).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Latex (L-9) Containing Polymer Particles (A)
- MMA methyl methacrylate
- BA n-butyl acrylate
- Latex (L-9) was used in the same manner as in Production Example 2-8, except that 5.0 parts by weight, 4.0 parts by weight of styrene (St), and 1.8 parts by weight of glycidyl methacrylate (GMA) were used.
- St styrene
- GMA glycidyl methacrylate
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-9) was 130 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-9) was 30% by weight with respect to 100% by weight of the latex (L-9).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- the graft portion of the polymer particles (A) was derived from St and contained a structural unit containing an aromatic group.
- Latex (L-10) Containing Polymer Particles (A)
- Production Example 2-1 as a graft monomer, 10.2 parts by weight of methyl methacrylate (MMA), n-butyl acrylate (BA).
- Latex (L-10) was obtained in the same manner as in Production Example 2-1 except that 1.0 part by weight and 1.8 parts by weight of glycidyl methacrylate (GMA) were used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-10) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-10) was 30% by weight with respect to 100% by weight of the latex (L-10).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- Latex (L-11) Containing Polymer Particles (A)
- Production Example 2-1 as a graft monomer, 9.2 parts by weight of methyl methacrylate (MMA) and 4-hydroxybutyl acrylate (4HBA).
- Latex (L-11) was obtained in the same manner as in Production Example 2-1 except that 2.0 parts by weight and 1.8 parts by weight of glycidyl methacrylate (GMA) were used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-11) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-11) was 30% by weight with respect to 100% by weight of the latex (L-11).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- the graft portion of the polymer particles (A) was derived from 4HBA and contained a structural unit containing a hydroxyl group.
- Production Example 2-12 Preparation of Latex (L-12) Containing Polymer Particles (A)
- Production Example 2-1 As graft monomers, 11.2 parts by weight of 2-methoxyethyl methacrylate (MEMA) and glycidyl methacrylate ( GMA) Latex (L-12) was obtained in the same manner as in Production Example 2-1 except that 1.8 parts by weight was used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-12) was 200 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-12) was 30% by weight with respect to 100% by weight of the latex (L-12).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- the graft portion of the polymer particles (A) was derived from MEMA and contained a structural unit containing an alkoxy group.
- Latex (L-13) Containing Polymer Particles (A)
- MMA methyl methacrylate
- BA n-butyl acrylate
- Latex (L-13) was obtained in the same manner as in Production Example 2-8, except that 1.0 part by weight and 1.8 parts by weight of glycidyl methacrylate (GMA) were used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-13) was 130 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-13) was 30% by weight with respect to 100% by weight of the latex (L-13).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- MMA methyl methacrylate
- BA n-butyl acrylate
- Latex (L-14) was obtained in the same manner as in Production Example 2-8, except that 9.0 parts by weight and 1.8 parts by weight of glycidyl methacrylate (GMA) were used.
- the polymerization conversion rate of the monomer component was 96% by weight or more.
- the volume average particle diameter of the polymer particles (A) contained in the obtained latex (L-14) was 130 nm.
- the solid content concentration (concentration of the polymer particles (A)) in the obtained latex (L-14) was 30% by weight with respect to 100% by weight of the latex (L-14).
- the graft portion of the polymer particles (A) contained 14% by weight of a structural unit having an epoxy group in 100% by weight of the graft portion.
- the weight ratio of the elastic body / graft portion of the polymer particles (A) was 87/13.
- Example 1 After the temperature in the mixing tank of the 1L mixing tank was set to 30 ° C., 126 parts by weight of methyl ethyl ketone (MEK) was charged into the mixing tank. Then, 143 parts by weight of the latex (L-1) of the polymer particles (A) was put into the mixing tank while stirring the MEK in the mixing tank. After uniformly mixing the charged raw materials, 200 parts by weight of water (452 parts by weight in total) was charged into the mixing tank at a supply rate of 80 parts by weight / minute while stirring. When the stirring was immediately stopped after the water supply was completed, a slurry liquid containing buoyant aggregates was obtained.
- MEK methyl ethyl ketone
- agglomerates were left in the mixing tank, and 350 parts by weight of the liquid phase was discharged from the discharge port at the bottom of the mixing tank.
- 150 parts by weight of MEK was added to the obtained aggregate (polymer particle (A) dope) and mixed to obtain an organic solvent solution in which the polymer particles (A) were dispersed. Obtained by adding 64 parts by weight of a liquid epoxy resin (manufactured by Mitsubishi Chemical Corporation, JER828) as a matrix resin (B) to 277 parts by weight of this organic solvent solution (containing 42.9 parts by weight of the polymer particles (A)).
- MEK was distilled off under reduced pressure to obtain a resin composition (A-1).
- the resin composition (A-1) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- the resin composition (A-1), 85 g of a liquid epoxy resin (manufactured by Mitsubishi Chemical Co., Ltd., JER828), and 100 g of silica (manufactured by Tatsumori Chemical Co., Ltd., CMC-12S) as an inorganic filler are rotated and revolved. Mixing was performed using a mixer to obtain a silica mixture (resin composition).
- the silica mixture had a weight ratio of polymer particles (A): matrix resin (B): inorganic filler of 10: 100: 100.
- Table 1 The results are shown in Table 1 below.
- Example 2 A resin composition (A-2) was obtained by the same method as in Example 1 except that the latex (L-2) was used as the latex of the polymer particles (A).
- the resin composition (A-2) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- the resin composition (A-2), 85 g of a liquid epoxy resin (manufactured by Mitsubishi Chemical Co., Ltd., JER828), and 100 g of silica (manufactured by Tatsumori Chemical Co., Ltd., CMC-12S) as an inorganic filler are rotated and revolved. Mixing was performed using a mixer to obtain a silica mixture (resin composition).
- the silica mixture had a weight ratio of polymer particles (A): matrix resin (B): inorganic filler of 10: 100: 100.
- Table 1 The results are shown in Table 1 below.
- Example 3 The resin composition (A-3) was obtained by the same method as in Example 1 except that the latex (L-3) was used as the latex of the polymer particles (A).
- the resin composition (A-3) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- the resin composition (A-3), 85 g of a liquid epoxy resin (manufactured by Mitsubishi Chemical Co., Ltd., JER828), and 100 g of silica (manufactured by Tatsumori Chemical Co., Ltd., CMC-12S) as an inorganic filler are rotated and revolved. Mixing was performed using a mixer to obtain a silica mixture (resin composition).
- the silica mixture had a weight ratio of polymer particles (A): matrix resin (B): inorganic filler of 10: 100: 100.
- Table 1 The results are shown in Table 1 below.
- Example 4 A resin composition (A-4) was obtained by the same method as in Example 1 except that the latex (L-4) was used as the latex of the polymer particles (A).
- the resin composition (A-4) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- the resin composition (A-4), 85 g of a liquid epoxy resin (manufactured by Mitsubishi Chemical Co., Ltd., JER828), and 100 g of silica (manufactured by Tatsumori Chemical Co., Ltd., CMC-12S) as an inorganic filler are rotated and revolved. Mixing was performed using a mixer to obtain a silica mixture (resin composition).
- the silica mixture had a weight ratio of polymer particles (A): matrix resin (B): inorganic filler of 10: 100: 100.
- Table 1 The results are shown in Table 1 below.
- Example 5 A resin composition (A-5) was obtained by the same method as in Example 1 except that the latex (L-5) was used as the latex of the polymer particles (A).
- the resin composition (A-5) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- Example 6 A resin composition (A-6) was obtained by the same method as in Example 1 except that the latex (L-6) was used as the latex of the polymer particles (A).
- the resin composition (A-6) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- the resin composition (A-6), 85 g of the liquid epoxy resin (manufactured by Mitsubishi Chemical Co., Ltd., JER828), and 100 g of the inorganic filler silica (manufactured by Tatsumori Chemical Co., Ltd., CMC-12S) are rotated and revolved. Mixing was performed using a mixer to obtain a silica mixture (resin composition).
- the silica mixture had a weight ratio of polymer particles (A): matrix resin (B): inorganic filler of 10: 100: 100.
- Table 1 The results are shown in Table 1 below.
- Example 7 A resin composition (A-7) was obtained by the same method as in Example 1 except that latex (L-7) was used as the latex of the polymer particles (A).
- latex (L-7) was used as the latex of the polymer particles (A).
- the resin composition (A-7) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- the resin composition (A-7), 85 g of the liquid epoxy resin (manufactured by Mitsubishi Chemical Co., Ltd., JER828), and 100 g of the inorganic filler silica (manufactured by Tatsumori Chemical Co., Ltd., CMC-12S) are rotated and revolved. Mixing was performed using a mixer to obtain a silica mixture (resin composition).
- the silica mixture had a weight ratio of polymer particles (A): matrix resin (B): inorganic filler of 10: 100: 100.
- Table 1 The results are shown in Table 1 below.
- Example 8 A resin composition (A-8) was obtained by the same method as in Example 1 except that the latex (L-8) was used as the latex of the polymer particles (A).
- the resin composition (A-8) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- the resin composition (A-8), 85 g of the liquid epoxy resin (manufactured by Mitsubishi Chemical Co., Ltd., JER828), and 100 g of the inorganic filler silica (manufactured by Tatsumori Chemical Co., Ltd., CMC-12S) are rotated and revolved. Mixing was performed using a mixer to obtain a silica mixture (resin composition).
- the silica mixture had a weight ratio of polymer particles (A): matrix resin (B): inorganic filler of 10: 100: 100.
- Table 1 The results are shown in Table 1 below.
- a resin composition (A-9) was obtained by the same method as in Example 1 except that latex (L-9) was used as the latex of the polymer particles (A).
- the resin composition (A-9) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- a resin composition (A-10) was obtained by the same method as in Example 1 except that the latex (L-10) was used as the latex of the polymer particles (A).
- the resin composition (A-10) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- a resin composition (A-11) was obtained by the same method as in Example 1 except that latex (L-11) was used as the latex of the polymer particles (A).
- latex (L-11) was used as the latex of the polymer particles (A).
- the polymer particles (A) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- a resin composition (A-12) was obtained by the same method as in Example 1 except that latex (L-12) was used as the latex of the polymer particles (A).
- latex (L-12) was used as the latex of the polymer particles (A).
- the polymer particles (A) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- a resin composition (A-13) was obtained by the same method as in Example 1 except that latex (L-13) was used as the latex of the polymer particles (A).
- latex (L-13) was used as the latex of the polymer particles (A).
- the resin composition (A-13) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- a resin composition (A-14) was obtained by the same method as in Example 1 except that latex (L-14) was used as the latex of the polymer particles (A).
- latex (L-14) was used as the latex of the polymer particles (A).
- the polymer particles (A) when the total of the polymer particles (A) and the matrix resin (B) is 100% by weight, the polymer particles (A) are 40% by weight and the matrix resin (B) is 60% by weight. It contained% by weight.
- the obtained resin composition (A-14) gelled during degassing, so that the viscosity at 50 ° C. could not be measured.
- the resin compositions (A-1) to (A-8) of Examples 1 to 8 had a viscosity at 50 ° C. of 20,000 mPa ⁇ s or less. Further, the resin compositions (A-1) to (A-8) of Examples 1 to 8 had a viscosity at 25 ° C. of 230,000 mPa ⁇ s or less when the inorganic filler was added. In particular, the resin compositions (A-1) to (A-6) and (A-8) of Examples 1 to 6 and 8 have a viscosity of 140,000 mPa ⁇ s at 25 ° C. when the inorganic filler is added. It was as follows.
- the resin composition according to one aspect of the present invention includes adhesives, coating materials, reinforcing fiber binders, composite materials, 3D printer modeling materials, encapsulants, electronic substrates, ink binders, wood chip binders, rubber chip binders, and the like. It is preferably used in applications such as foam chip binders, binders for castings, bedrock binders for flooring and ceramics, and urethane foams.
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Abstract
Description
上述したように、熱硬化性樹脂の耐衝撃性を改善するために、熱硬化性樹脂にポリマー粒子を添加する技術がある。ここで、マトリクス樹脂中にポリマー粒子を高濃度に含む樹脂組成物が求められる場合がある。例えば、ポリマー粒子を高濃度に含む樹脂組成物を、さらに別のマトリクス樹脂と混合してポリマー粒子の濃度が低い樹脂組成物を得る場合である。この場合、ポリマー粒子を高濃度に含む樹脂組成物は、所謂「マスターバッチ」として使用される。また、ポリマー粒子によるマトリクス樹脂の改質効果を向上させるために、マトリクス樹脂中にポリマー粒子を高濃度に含む樹脂組成物が求められる場合もある。
本発明の一実施形態に係る樹脂組成物は、ポリマー粒子(A)およびマトリクス樹脂(B)を含む樹脂組成物である。前記ポリマー粒子(A)はグラフト部を有している。
(I)(i)(i-a)芳香族基を含む構成単位を含まないか、または
(i-b)前記グラフト部100重量%中、芳香族基を含む構成単位を0重量%超10重量%以下含み、
(ii)アルキルメタクリレートに由来する構成単位およびアルキルアクリレートに由来する構成単位の少なくとも一方を含み、
(iii)アルコキシ基を含む構成単位、アリールオキシ基を含む構成単位、オキセタン基を含む構成単位、水酸基を含む構成単位、アミノ基を含む構成単位、イミド基を含む構成単位、カルボン酸基を含む構成単位、カルボン酸無水物基を含む構成単位、環状エステル基を含む構成単位、環状アミド基を含む構成単位、ベンズオキサジン基を含む構成単位、およびシアン酸エステル基を含む構成単位を含まない、重合体であるか、または
(II)前記グラフト部100重量%中、
(i)(i-a)芳香族基を含む構成単位を含まないか、または
(i-b)芳香族基を含む構成単位を0重量%超10重量%以下含み、
(ii)(ii-a)アルキルメタクリレートに由来する構成単位およびアルキルアクリレートに由来する構成単位の少なくとも一方を含み、かつ
(ii-b)当該アルキルメタクリレートに由来する構成単位および当該アルキルアクリレートに由来する構成単位の合計含有量が50重量%以上である、重合体である。
ポリマー粒子(A)は、重合により得られる微粒子である。ポリマー粒子(A)は、グラフト部を有している。ポリマー粒子(A)としては、グラフト部を有する限り、その他の構成は特に限定されない。ポリマー粒子(A)は、グラフト共重合体ともいえる。
本明細書において、任意の重合体に対してグラフト結合された重合体をグラフト部と称する。
グラフト部のガラス転移温度(以下、単に「Tg」と称する場合がある)は、樹脂組成物中のポリマー粒子(A)同士の融着を防ぐ点から、-25℃以上であり、-23℃以上が好ましく、-21℃以上がより好ましく、-19℃以上がより好ましく、-17℃以上がより好ましく、-15℃以上がさらに好ましく、-13℃以上が特に好ましい。
ここで、Tg1、Tg2、・・・、Tgnは、それぞれ、グラフト部を構成する成分(すなわちグラフト部の製造で使用した単量体)1、2、・・・、nの単独重合体のTg(K)、w1、w2、・・・、wnは、それぞれ、グラフト部を構成する成分(すなわちグラフト部の製造で使用した単量体)1、2、・・・、nの重量分率である。また、単独重合体のTgは、例えば、Polymer Handbook Fourth Edition(J.Brandupら編、Jphn Wiley & Sons,Inc)に記載されている数値などを用いることができる。また、新規ポリマーの場合には、粘弾性測定法(剪断法、測定周波数:1Hz)における損失正接(tanδ)のピーク温度をTgとして採用すればよい。
本発明の一実施形態において、ポリマー粒子(A)は、グラフト部と同じ構成を有する重合体であり、かつ任意の重合体(例えば後述する弾性体)に対してグラフト結合されていない重合体を有していてもよい。本明細書において、「グラフト部と同じ構成を有する重合体であり、かつ任意の重合体に対してグラフト結合されていない重合体」を、非グラフト重合体とも称する。当該非グラフト重合体も、本発明の一実施形態に係るポリマー粒子(A)の一部を構成するものとする。前記非グラフト重合体は、グラフト部の重合(調製工程)において製造された重合体のうち、任意の重合体に対してグラフト結合していない重合体ともいえる。
グラフト率(%)=100-[(メタノール不溶分の重量)/{(メタノール不溶分の重量)+(MEK不溶分の重量)}]/(グラフト部の重合体の重量)×10000。
本発明の一実施形態において、グラフト部は、同一の組成の構成単位を有する1種のグラフト部のみからなってもよい。本発明の一実施形態において、グラフト部は、それぞれ異なる組成の構成単位を有する複数種のグラフト部からなってもよい。
ポリマー粒子(A)は、さらに弾性体を有するものであることが好ましい。上述したグラフト部は、弾性体に対してグラフト結合された重合体であることが好ましい。すなわち、ポリマー粒子(A)は、弾性体と、当該弾性体に対してグラフト結合されたグラフト部と、を有するゴム含有グラフト共重合体であることが好ましい。以下、ポリマー粒子(A)がゴム含有グラフト共重合体である場合を例に挙げて、本発明の一実施形態を説明する。
ポリマー粒子(A)のマトリクス樹脂(B)中での分散安定性を保持する観点から、弾性体には、架橋構造が導入されていることが好ましい。弾性体に対する架橋構造の導入方法としては、一般的に用いられる手法を採用することができ、例えば以下の方法が挙げられる。すなわち、弾性体の製造において、弾性体を構成し得る単量体に、多官能性単量体および/またはメルカプト基含有化合物などの架橋性単量体を混合し、次いで重合する方法が挙げられる。本明細書において、弾性体など重合体を製造することを、重合体を重合する、とも称する。
弾性体のガラス転移温度は、80℃以下が好ましく、70℃以下がより好ましく、60℃以下がより好ましく、50℃以下がより好ましく、40℃以下がより好ましく、30℃以下がより好ましく、20℃以下がより好ましく、10℃以下がより好ましく、0℃以下がより好ましく、-20℃以下がより好ましく、-40℃以下がより好ましく、-45℃以下がより好ましく、-50℃以下がより好ましく、-55℃以下がより好ましく、-60℃以下がより好ましく、-65℃以下がより好ましく、-70℃以下がより好ましく、-75℃以下がより好ましく、-80℃以下がより好ましく、-85℃以下がより好ましく、-90℃以下がより好ましく、-95℃以下がより好ましく、-100℃以下がより好ましく、-105℃以下がより好ましく、-110℃以下がより好ましく、-115℃以下がより好ましく、-120℃以下がさらに好ましく、-125℃以下が特に好ましい。本明細書において、「ガラス転移温度」を「Tg」と称する場合もある。当該構成によると、低いTgを有するポリマー粒子(A)、および、低いTgを有する樹脂組成物を得ることができる。その結果、得られる樹脂組成物は、優れた靱性を有する硬化物を提供できる。また、当該構成によると、得られる樹脂組成物の粘度を、より低くすることができる。
上述した単量体aからなる群から選択される少なくとも1種の単量体に由来する構成単位を0~50(より好ましくは、1~35重量%)、および単量体bからなる群から選択される少なくとも1種の単量体に由来する構成単位を50~100重量%(より好ましくは、65~99重量%)含む弾性体を、弾性体Gとする。弾性体Gは、Tgが0℃よりも大きい。また、弾性体が弾性体Gを含む場合、得られる樹脂組成物は、十分な剛性を有する硬化物を提供することができる。
弾性体の体積平均粒子径は、特に限定されないが、0.03μm~50.00μmが好ましく、0.05μm~10.00μmがより好ましく、0.08μm~2.00μmがより好ましく、0.10μm~1.00μmがさらに好ましく、0.10μm~0.80μmがより好ましく、0.10μm~0.50μmがより好ましく、0.15μm以上0.30μm以下であることがより好ましく、0.15μm以上0.30μm未満であることが好ましく、0.16μm以上0.28μm以下であることがより好ましく、0.17μm以上0.27μm以下であることがさらに好ましく、0.18μm以上0.25μm以下であることが特に好ましい。弾性体の体積平均粒子径が(a)0.03μm以上である場合、所望の体積平均粒子径を有する弾性体を安定的に得ることができ、(b)50.00μm以下である場合、得られる硬化物または成形体の耐熱性および耐衝撃性が良好となる。また、弾性体の体積平均粒子径が(a)0.15μm以上である場合、樹脂組成物の粘度が低くなり、樹脂組成物がハンドリングに優れるという利点を有し、(b)0.30μm以下である場合、弾性体の重合時間が短くない、工業的生産性が高くなるという利点を有する。弾性体の体積平均粒子径は、弾性体を含む水性懸濁液を試料として、動的光散乱式粒子径分布測定装置などを用いて、測定することができる。弾性体の体積平均粒子径の測定方法については、下記実施例にて詳述する。
ポリマー粒子(A)中に占める弾性体の割合は、ポリマー粒子(A)全体を100重量%として、40~97重量%が好ましく、60~95重量%がより好ましく、70~93重量%がさらに好ましい。弾性体の前記割合が、(a)40重量%以上である場合、得られる樹脂組成物は、靱性および耐衝撃性に優れる硬化物を提供することができ、(b)97重量%以下である場合、ポリマー粒子(A)は容易には凝集しないため、樹脂組成物が高粘度となることがなく、その結果、得られる樹脂組成物は取り扱いに優れたものとなり得る。
弾性体は、適切な溶媒に対して膨潤し得るが、実質的には溶解しないものであることが好ましい。弾性体は、使用するマトリクス樹脂(B)に対して、不溶であることが好ましい。
ゲル含量(%)=(メチルエチルケトン不溶分の重量)/{(メチルエチルケトン不溶分の重量)+(メチルエチルケトン可溶分の重量)}×100
(弾性体の変形例)
本発明の一実施形態において、ポリマー粒子(A)の「弾性体」は、構成単位の組成が同一である1種類の弾性体、のみからなってもよい。この場合、ポリマー粒子(A)の「弾性体」は、ジエン系ゴム、(メタ)アクリレート系ゴムおよびオルガノシロキサン系ゴムからなる群より選択される1種類である。
ゴム含有グラフト共重合体は、弾性体、および、当該弾性体に対してグラフト結合されたグラフト部以外に、表面架橋重合体をさらに有することが好ましい。換言すれば、ポリマー粒子(A)は、弾性体、および、当該弾性体に対してグラフト結合されたグラフト部以外に、表面架橋重合体をさらに有することが好ましい。以下、ポリマー粒子(A)(例えばゴム含有グラフト共重合体)が、表面架橋重合体をさらに有する場合を例に挙げて、本発明の一実施形態を説明する。この場合、(a)ポリマー粒子(A)の製造において、耐ブロッキング性を改善することができるとともに、(b)マトリクス樹脂(B)におけるポリマー粒子(A)の分散性がより良好となる。これらの理由としては、特に限定されないが、以下のように推測され得る:表面架橋重合体が弾性体の少なくとも一部を被覆することにより、ポリマー粒子(A)の弾性体部分の露出が減り、その結果、弾性体同士が引っ付きにくくなるため、ポリマー粒子(A)の分散性が向上する。
ポリマー粒子(A)の体積平均粒子径は、特に限定されないが、工業的生産性と樹脂組成物の作業性の観点から、すなわち粘度が低い樹脂組成物を得ることができることから、0.03μm~50.00μmが好ましく、0.05μm~10.00μmがより好ましく、0.08μm~2.00μmがより好ましく、0.10μm~1.00μmがさらに好ましく、0.10μm~0.80μmがより好ましく、0.10μm~0.50μmがより好ましく、0.15μm以上0.30μm以下であることがより好ましく、0.15μm以上0.30μm未満であることが好ましく、0.16μm以上0.28μm以下であることがより好ましく、0.17μm以上0.27μm以下であることがさらに好ましく、0.18μm以上0.25μm以下であることが特に好ましい。ポリマー粒子(A)の体積平均粒子径を、(a)0.15μm以上とすることで、樹脂組成物の粘度が低くなり、樹脂組成物がハンドリング性に優れるという利点を有し、(b)0.30μm以下とすることで、ポリマー粒子(A)の重合時間が短くなり、工業的生産性が高くなるという利点を有する。なお、ポリマー粒子の体積平均粒子径は、ポリマー粒子のラテックスについて、マイクロトラックUPA150(日機装株式会社製)を用いて測定される体積平均粒子径(Mv)である。
ポリマー粒子(A)は、任意の重合体を重合した後、当該重合体の存在下にて重合体に対してグラフト部を構成する重合体をグラフト重合することによって、製造できる。以下、弾性体を重合した後、弾性体の存在下にて弾性体に対してグラフト部を構成する重合体をグラフト重合することによって、ポリマー粒子(A)を製造する場合を例に挙げて、ポリマー粒子(A)の製造方法の一例を説明する。
弾性体が、ジエン系ゴムおよび(メタ)アクリレート系ゴムからなる群より選択される少なくとも1種以上を含む場合を考える。この場合、弾性体は、例えば、乳化重合、懸濁重合、マイクロサスペンジョン重合などの方法により製造することができ、その製造方法としては、例えばWO2005/028546号公報に記載の方法を用いることができる。
グラフト部は、例えば、グラフト部の形成に用いる単量体を、公知のラジカル重合により重合することによって形成することができる。(a)弾性体、または(b)弾性体および表面架橋重合体を含むポリマー粒子前駆体、を水性懸濁液として得た場合には、グラフト部の重合は乳化重合法により行うことが好ましい。グラフト部は、例えば、WO2005/028546号公報に記載の方法に従って製造することができる。
表面架橋重合体は、表面架橋重合体の形成に用いる単量体を公知のラジカル重合により重合することによって形成することができる。弾性体を水性懸濁液として得た場合には、表面架橋重合体の重合は乳化重合法により行うことが好ましい。
マトリクス樹脂(B)としては、熱硬化性樹脂を好適に利用し得る。熱硬化性樹脂は、エチレン性不飽和単量体を重合させてなる重合体を含む樹脂、エポキシ樹脂、フェノール樹脂、ポリオール樹脂およびアミノ-ホルムアルデヒド樹脂(メラミン樹脂)からなる群より選択される少なくとも1種の熱硬化性樹脂を含むことが好ましい。また、熱硬化性樹脂としては、芳香族ポリエステル原料を重合させてなる重合体を含む樹脂も挙げられる。芳香族ポリエステル原料としては、芳香族ビニル化合物、(メタ)アクリル酸誘導体、シアン化ビニル化合物、マレイミド化合物などのラジカル重合性単量体、ジメチルテレフタレート、アルキレングリコールなどが挙げられる。これら熱硬化性樹脂は1種類のみを用いてもよく、2種以上を併用して用いてもよい。
エチレン性不飽和単量体としては、分子中にエチレン性不飽和結合を少なくとも1個有するものであれば特に限定されない。
エポキシ樹脂としては、分子中にエポキシ結合を少なくとも1個有するものであれば特に限定されない。
フェノール樹脂は、フェノール類とアルデヒド類とを反応させて得られる化合物であれば特に限定されない。フェノール類としては特に限定されないが、例えば、フェノール、オルソクレゾール、メタクレゾール、パラクレゾール、キシレノール、パラターシャリーブチルフェノール、パラオクチルフェノール、パラフェニルフェノール、ビスフェノールA、ビスフェノールF、およびレゾルシンなどのフェノール類が挙げられる。特に好ましいフェノール類としては、フェノール、およびクレゾールが挙げられる。
ポリオール樹脂は、末端に活性水素を2個以上有する化合物であり、分子量50~20,000程度の2官能以上のポリオールである。ポリオール樹脂としては、脂肪族アルコール類、芳香族アルコール類、ポリエーテル型ポリオール類、ポリエステル型ポリオール類、ポリオレフィンポリオール類、およびアクリルポリオール類などを挙げることができる。
アミノ-ホルムアルデヒド樹脂は、アミノ化合物とアルデヒド類とをアルカリ性触媒下で反応させて得られる化合物であれば特に限定されない。前記アミノ化合物としては、メラミン;グアナミン、アセトグアナミン、ベンゾグアナミンなどの6-置換グアナミン類;CTUグアナミン(3,9-ビス[2-(3,5-ジアミノ-2,4,6-トリアザフェニル)エチル]-2,4,8,10-テトラオキサスピロ[5,5]ウンデカン)、CMTUグアナミン(3,9-ビス[(3,5-ジアミノ-2,4,6-卜リアザフェニル)メチル]-2,4,8,10-テトラオキサスピロ[5,5]ウンデカン)などのアミン置換トリアジン化合物;尿素、チオ尿素、エチレン尿素などの尿素類を挙げることができる。また前記アミノ化合物としては、メラミンのアミノ基の水素をアルキル基、アルケニル基、および/またはフェニル基で置換した置換メラミン化合物(米国特許第5,998,573号明細書(対応日本公開公報:特開平9-143238号)に記載されている。)、並びに、メラミンのアミノ基の水素をヒドロキシアルキル基、ヒドロキシアルキルオキシアルキル基、および/またはアミノアルキル基で置換した置換メラミン化合物(米国特許第5,322,915号明細書(対応日本公開公報:特開平5-202157号)に記載されている。)なども使用することができる。前記アミノ化合物としては、上述した化合物中でも、工業的に生産されており安価であることから、多官能性アミノ化合物である、メラミン、グアナミン、アセトグアナミン、およびベンゾグアナミンが好ましく、メラミンが特に好ましい。上述したアミノ化合物は、1種類のみを用いてもよく、2種以上を併用してもよい。またこれらアミノ化合物に加えて、(a)フェノール、クレゾール、アルキルフェノール、レゾルシン、ハイドロキノン、およびピロガロールなどのフェノール類、並びに(b)アニリン、などを追加して用いても良い。
マトリクス樹脂(B)の性状は特に限定されない。マトリクス樹脂(B)は、25℃において100mPa・s~1,000,000mPa・sの粘度を有することが好ましい。マトリクス樹脂(B)の粘度は、25℃において、50,000mPa・s以下であることがより好ましく、30,000mPa・s以下であることがさらに好ましく、15,000mPa・s以下であることが特に好ましい。前記構成によると、マトリクス樹脂(B)は流動性に優れるという利点を有する。25℃において100mPa・s~1,000,000mPa・sの粘度を有するマトリクス樹脂(B)は、液体であるともいえる。
ポリマー粒子(A)とマトリクス樹脂(B)との配合比率は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)が20重量%以上、マトリクス樹脂(B)が80重量%以下であることが好ましい。ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を20重量%以上含む樹脂組成物は、マスターバッチともいえる。樹脂組成物がマスターバッチである場合、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)が20重量%以上50重量%以下であることが好ましく、マトリクス樹脂(B)が50重量%以上80重量%以下であることが好ましく、ポリマー粒子(A)が30重量%以上50重量%以下であることがより好ましく、マトリクス樹脂(B)が50重量%以上70重量%以下であることがより好ましく、ポリマー粒子(A)が35重量%以上50重量%以下であることがより好ましく、マトリクス樹脂(B)が50重量%以上65重量%以下であることがより好ましく、ポリマー粒子(A)が40重量%以上50重量%以下であることがさらに好ましく、マトリクス樹脂(B)が50重量%以上60重量%以下であることがさらに好ましく、ポリマー粒子(A)が40重量%であることが特に好ましく、マトリクス樹脂(B)が60重量%であることが特に好ましい。ポリマー粒子(A)とマトリクス樹脂(B)との配合比率が上記構成である場合、配合自由度が向上するという利点を有する。本樹脂組成物は、ポリマー粒子(A)を高濃度で含む場合であっても、低粘度化を実現することができる。また、マスターバッチを用いてさらにポリマー粒子(A)の含有量が少ない樹脂組成物を作製する場合、当該樹脂組成物は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)が1重量%以上20重量%以下であることが好ましく、マトリクス樹脂(B)が80重量%以上99重量%以下であることが好ましく、ポリマー粒子(A)が1重量%以上16重量%以下であることがより好ましく、マトリクス樹脂(B)が84重量%以上99重量%以下であることがより好ましく、ポリマー粒子(A)が1重量%以上12重量%以下であることがさらに好ましく、マトリクス樹脂(B)が88重量%以上99重量%以下であることがさらに好ましい。
本樹脂組成物は、必要に応じて、前述した成分以外の、その他の任意成分を含有してもよい。その他の任意成分としては、無機充填材、有機質充填材、ブロッキング防止剤、硬化剤、顔料および染料などの着色剤、体質顔料、紫外線吸収剤、酸化防止剤、熱安定化剤(ゲル化防止剤)、可塑剤、レベリング剤、消泡剤、シランカップリング剤、帯電防止剤、難燃剤、滑剤、減粘剤、低収縮剤、乾燥剤、並びに分散剤などが挙げられる。
本樹脂組成物は、上述したように、無機充填材を含んでいてもよい。本樹脂組成物は無機充填材と反応する官能基を有していないため、無機充填材を含む場合であっても、低粘度化を実現することができる。無機充填材としては、ケイ酸、ケイ酸塩、ドロマイト、補強性充填材、酸化カルシウム、炭酸カルシウム、炭酸マグネシウム、酸化チタン、酸化第二鉄、水酸化アルミニウム、アルミニウム微粉末、酸化亜鉛、活性亜鉛華などが挙げられる。本樹脂組成物が無機充填材を含む場合、経済性に優れるという利点を有し、かつ、当該樹脂組成物から得られる硬化物が強度および難燃性に優れるという利点を有する。
本樹脂組成物は、上述したように、無機充填材として酸化カルシウムを含んでいてもよい。本樹脂組成物が無機充填材として酸化カルシウムを含む場合、当該酸化カルシウムは、樹脂組成物中の水分との反応により樹脂組成物から水分を除去し、水分の存在により引き起こされる種々の物性上の問題を解決できる。酸化カルシウムは、例えば、水分除去による気泡防止剤として機能し、得られる硬化物の接着強度の低下を抑制できる。
本樹脂組成物は、上述したように、無機充填材として水酸化アルミニウムを含んでいてもよい。水酸化アルミニウムは、Al(OH)3またはAl2O3・3H2Oなる化学式で表わされる白色粉末結晶であり、一般にボーキサイトを原料としてバイヤー法にて製造される。水酸化アルミニウムは、分級により、様々な平均粒子径を有する製品が存在する。
本樹脂組成物は、粘度が低く、それ故ハンドリング性に優れるという利点を有する。本発明の一実施形態において、樹脂組成物が無機充填材を含まない場合、当該樹脂組成物の50℃における粘度が20,900mPa・s以下であれば、当該樹脂組成物(無機充填材を含まない)は粘度が低く、ハンドリング性に優れると判定する。なお、本明細書において、「樹脂組成物のX℃における粘度」は、「X℃である樹脂組成物の粘度」を意図する。本樹脂組成物が無機充填材を含まない場合、当該樹脂組成物の50℃における粘度は20,900mPa・s以下であることが好ましく、20,500mPa・s以下であることがより好ましく、20,000mPa・s以下であることがより好ましく、18,000mPa・s以下であることがより好ましく、15,000mPa・s以下であることがより好ましく、14,000mPa・s以下であることがより好ましく、13,000mPa・s以下であることがより好ましく、12,000mPa・s以下であることがさらに好ましく、11,000mPa・s以下であることが特に好ましい。当該構成によると、樹脂組成物は流動性に優れるという利点も有する。
上述したように、本樹脂組成物は、マトリクス樹脂(B)中にポリマー粒子(A)が1次粒子の状態で分散している組成物であることが好ましい。このような、マトリクス樹脂(B)中にポリマー粒子(A)が1次粒子の状態で分散している組成物を得る方法(すなわち、本樹脂組成物の製造方法)としては、種々の方法が利用できる。本樹脂組成物の製造方法としては、例えば、(i)水性ラテックス状態で得られたポリマー粒子(A)をマトリクス樹脂(B)と接触させた後、水等の不要な成分を除去する方法、(i)水性ラテックス状態で得られたポリマー粒子(A)を一旦有機溶剤に抽出後、得られたポリマー粒子(A)の有機溶媒溶液とマトリクス樹脂(B)とを混合してから有機溶剤を除去する方法、等が挙げられる。本樹脂組成物の製造方法としては、国際公開第2005/028546号に記載の方法を利用することが好ましい。その具体的な製造方法は、順に、(i)ポリマー粒子(A)を含有する水性ラテックス(詳細には、乳化重合によってポリマー粒子(A)を製造した後の反応混合物)を、20℃における水に対する溶解度が5重量%以上40重量%以下の有機溶媒と混合した後、得られた混合物にさらに過剰の水を添加し、混合して、ポリマー粒子(A)を凝集させる第1工程と、(ii)凝集したポリマー粒子(A)を混合物(液相)から分離し、回収した後、回収されたポリマー粒子(A)を再度有機溶媒と混合して、ポリマー粒子(A)の有機溶媒溶液を得る第2工程と、(iii)得られた有機溶媒溶液をさらにマトリクス樹脂(B)と混合した後、前記有機溶媒を留去する第3工程と、を含む。本樹脂組成物は、上述した第1工程、第2工程および第3工程を含む製造方法により調製されることが好ましい。
本発明の一実施形態に係る硬化物は、〔2.樹脂組成物〕の項で説明した樹脂組成物を硬化させたものである。本明細書において、「本発明の一実施形態に係る硬化物」を、単に「本硬化物」と称する場合もある。
上述した本樹脂組成物は、様々な用途に使用することができ、それらの用途は特に限定されない。本樹脂組成物等は、それぞれ、例えば、接着剤、コーティング材、強化繊維のバインダー、複合材料、3Dプリンターの造形材料、封止剤、電子基板、インキバインダー、木材チップバインダー、ゴムチップ用バインダー、フォームチップバインダー、鋳物用バインダー、床材用およびセラミック用の岩盤固結材、ウレタンフォームなどの用途に好ましく用いられる。接着剤としては、一成分型接着剤、二成分型接着剤などが挙げられる。本樹脂組成物を接着剤として使用する場合、エポキシ硬化剤を使用し得る。エポキシ硬化剤としては、各種のエポキシ硬化剤を使用することができる。エポキシ硬化剤としては、例えば、芳香族アミンなどが挙げられる。ウレタンフォームとしては、自動車シート、自動車内装部品、吸音材、制振材、ショックアブソーバー(衝撃吸収材)、断熱材、工事用床材クッションなどが挙げられる。
前記ポリマー粒子(A)はグラフト部を有し、
前記グラフト部は、
(i)(i-a)芳香族基を含む構成単位を含まないか、または
(i-b)前記グラフト部100重量%中、芳香族基を含む構成単位を0重量%超10重量%以下含み、
(ii)アルキルメタクリレートに由来する構成単位およびアルキルアクリレートに由来する構成単位の少なくとも一方を含み、
(iii)アルコキシ基を含む構成単位、アリールオキシ基を含む構成単位、オキセタン基を含む構成単位、水酸基を含む構成単位、アミノ基を含む構成単位、イミド基を含む構成単位、カルボン酸基を含む構成単位、カルボン酸無水物基を含む構成単位、環状エステル基を含む構成単位、環状アミド基を含む構成単位、ベンズオキサジン基を含む構成単位、およびシアン酸エステル基を含む構成単位を含まない、重合体であり、
前記グラフト部のガラス転移温度は、-25℃以上18℃以下である、樹脂組成物。
前記ポリマー粒子(A)はグラフト部を有し、
前記グラフト部は、前記グラフト部100重量%中、
(i)(i-a)芳香族基を含む構成単位を含まないか、または
(i-b)芳香族基を含む構成単位を0重量%超10重量%以下含み、
(ii)アルキルメタクリレートに由来する構成単位およびアルキルアクリレートに由来する構成単位の少なくとも一方を50重量%以上含む、重合体であり、
前記グラフト部のガラス転移温度は、-25℃以上18℃以下であり、
前記ポリマー粒子(A)と前記マトリクス樹脂(B)との合計を100重量%とした場合に、前記ポリマー粒子(A)が20重量%以上50重量%以下であり、前記マトリクス樹脂(B)が50重量%以上80重量%以下である、樹脂組成物。
50℃における粘度が20,000mPa・s以下である、〔X1〕~〔X8〕のいずれか1つに記載の樹脂組成物。
前記ポリマー粒子(A)はグラフト部を有し、
前記グラフト部は、
(i)(i-a)芳香族基を含む構成単位を含まないか、または
(i-b)前記グラフト部100重量%中、芳香族基を含む構成単位を0重量%超10重量%以下含み、
(ii)アルキルメタクリレートに由来する構成単位およびアルキルアクリレートに由来する構成単位の少なくとも一方を含み、
(iii)アルコキシ基を含む構成単位、アリールオキシ基を含む構成単位、オキセタン基を含む構成単位、水酸基を含む構成単位、アミノ基を含む構成単位、イミド基を含む構成単位、カルボン酸基を含む構成単位、カルボン酸無水物基を含む構成単位、環状エステル基を含む構成単位、環状アミド基を含む構成単位、ベンズオキサジン基を含む構成単位、およびシアン酸エステル基を含む構成単位を含まない、重合体であり、
前記グラフト部のガラス転移温度は、-25℃以上18℃以下である、樹脂組成物。
前記ポリマー粒子(A)はグラフト部を有し、
前記グラフト部は、前記グラフト部100重量%中、
(i)(i-a)芳香族基を含む構成単位を含まないか、または
(i-b)芳香族基を含む構成単位を0重量%超10重量%以下含み、
(ii)(ii-a)アルキルメタクリレートに由来する構成単位およびアルキルアクリレートに由来する構成単位の少なくとも一方を含み、かつ
(ii-b)当該アルキルメタクリレートに由来する構成単位および当該アルキルアクリレートに由来する構成単位の合計含有量が50重量%以上である、重合体であり、
前記グラフト部のガラス転移温度は、-25℃以上18℃以下であり、
前記ポリマー粒子(A)と前記マトリクス樹脂(B)との合計を100重量%とした場合に、前記ポリマー粒子(A)が20重量%以上50重量%以下であり、前記マトリクス樹脂(B)が50重量%以上80重量%以下である、樹脂組成物。
50℃における粘度が20,000mPa・s以下である、〔Y1〕~〔Y8〕のいずれか1つに記載の樹脂組成物。
先ず、実施例および比較例によって製造した樹脂組成物の評価方法について、以下説明する。
(a)水性懸濁液に分散している弾性体および(b)ラテックスに分散しているポリマー粒子(A)の体積平均粒子径(Mv)は、Nanotrac WaveII-EX150(マイクロトラックベル株式会社製)を用いて測定した。水性懸濁液またはラテックスを脱イオン水で希釈したものを測定試料として用いた。測定は、水、および、各製造例で得られた弾性体またはポリマー粒子(A)の屈折率を入力し、計測時間120秒、ローディングインデックス1~20の範囲内になるように試料濃度を調整して行った。
以下の実施例および比較例で使用したマトリクス樹脂(B)である液状エポキシ樹脂(三菱ケミカル株式会社製、JER828)、または得られた樹脂組成物の粘度測定行った。使用した装置は、BROOKFIELD社製デジタル粘度計DV-II+Pro型であった。また、粘度領域によってスピンドルCPE-52を用い、測定温度25℃または50℃にてShear Rate(ずり速度)を必要に応じ変化させて、粘度を測定した。その結果、マトリクス樹脂(B)である液状エポキシ樹脂の粘度は12,000mPa・sであった。
グラフト部のTgは、以下の単量体の単独重合体のTg値を用い、上述の数式1に従い算出した。
エチルアクリレート(EA) -20℃
n-ブチルアクリレート(BA) -54℃
メチルアクリレート(MA) 8℃
グリシジルメタクリレート(GMA) 46℃
スチレン(St) 80℃
4-ヒドロキシブチルアクリレート(4HBA) -40℃
2-メトキシエチルメタクリレート(MEMA) 16℃
1.弾性体の重合
製造例1-1;ポリブタジエンゴムを主成分とする弾性体を含む水性懸濁液(R-1)の調製
耐圧重合器中に、脱イオン水200重量部、リン酸三カリウム0.03重量部、エチレンジアミン四酢酸二ナトリウム(EDTA)0.002重量部、硫酸第一鉄・7水和塩0.001重量部、および乳化剤としてドデシルベンゼンスルホン酸ナトリウム(SDBS)1.55重量部を投入した。次に、投入した原料を撹拌しつつ、耐圧重合器内部の気体を窒素置換することにより、耐圧重合器内部から酸素を十分に除いた。その後、ブタジエン(Bd)100重量部を耐圧重合器内に投入し、耐圧重合器内の温度を45℃に昇温した。その後、パラメンタンハイドロパーオキサイド(PHP)0.03重量部を耐圧重合器内に投入し、続いてナトリウムホルムアルデヒドスルホキシレート(SFS)0.10重量部を耐圧重合器内に投入し、重合を開始した。重合開始から15時間目に、減圧下にて脱揮して、重合に使用されずに残存した単量体を脱揮除去することにより、重合を終了した。重合中、PHP、EDTAおよび硫酸第一鉄・7水和塩のそれぞれを、任意の量および任意の時宜で耐圧重合器内に添加した。当該重合により、ポリブタジエンゴムを主成分とする弾性体を含む水性懸濁液(R-1)を得た。得られた水性懸濁液(R-1)に含まれる弾性体の体積平均粒子径は90nmであった。
耐圧重合器中に、前記で得た水性懸濁液(R-1)を固形分で7重量部、脱イオン水200重量部、リン酸三カリウム0.03重量部、EDTA0.002重量部、及び硫酸第一鉄・7水和塩0.001重量部を投入した。次に、投入した原料を撹拌しつつ、耐圧重合器内部の気体を窒素置換することにより、耐圧重合器内部から酸素を十分に除いた。その後、Bd93重量部を耐圧重合器内に投入し、耐圧重合器内の温度を45℃に昇温した。その後、PHP0.02重量部を耐圧重合器内に投入し、続いてSFS0.10重量部を耐圧重合器内に投入し、重合を開始した。重合開始から30時間目に、減圧下にて脱揮して、重合に使用されずに残存した単量体を脱揮除去することにより、重合を終了した。重合中、PHP、EDTA、硫酸第一鉄・7水和塩およびSDBSのそれぞれを、任意の量および任意の時宜で耐圧重合器内に添加した。当該重合により、ポリブタジエンゴムを主成分とする弾性体を含む水性懸濁液(R-2)を得た。得られた水性懸濁液(R-2)に含まれる弾性体の体積平均粒子径は195nmであった。
耐圧重合器中に、脱イオン水200重量部、リン酸三カリウム0.03重量部、エチレンジアミン四酢酸二ナトリウム(EDTA)0.002重量部、硫酸第一鉄・7水和塩0.001重量部、および乳化剤としてドデシルベンゼンスルホン酸ナトリウム(SDBS)0.15重量部を投入した。次に、投入した原料を撹拌しつつ、耐圧重合器内部の気体を窒素置換することにより、耐圧重合器内部から酸素を十分に除いた。その後、ブタジエン(Bd)100重量部を耐圧重合器内に投入し、耐圧重合器内の温度を45℃に昇温した。その後、パラメンタンハイドロパーオキサイド(PHP)0.03重量部を耐圧重合器内に投入し、続いてナトリウムホルムアルデヒドスルホキシレート(SFS)0.10重量部を耐圧重合器内に投入し、重合を開始した。重合開始から15時間目に、減圧下にて脱揮して、重合に使用されずに残存した単量体を脱揮除去することにより、重合を終了した。重合中、PHP、EDTAおよび硫酸第一鉄・7水和塩のそれぞれを、任意の量および任意の時宜で耐圧重合器内に添加した。当該重合により、ポリブタジエンゴムを主成分とする弾性体を含む水性懸濁液(R-3)を得た。得られた水性懸濁液(R-3)に含まれる弾性体の体積平均粒子径は120nmであった。
製造例2-1;ポリマー粒子(A)を含むラテックス(L-1)の調製
ガラス製反応器に、前記水性懸濁液(R-2)250重量部(ポリブタジエンゴムを主成分とする弾性体87重量部を含む)、および、脱イオン水50重量部を投入した。ここで、前記ガラス製反応器は、温度計、撹拌機、還流冷却器、窒素流入口、および単量体の添加装置を有していた。ガラス製反応器中の気体を窒素で置換し、60℃にて投入した原料を撹拌した。次に、EDTA0.004重量部、硫酸第一鉄・7水和塩0.001重量部、およびSFS0.20重量部をガラス製反応器内に加え、10分間撹拌した。その後、グラフト部を形成するためのモノマー(以下、グラフトモノマーとも称する。)(n-ブチルアクリレート(BA)6.0重量部、メチルアクリレート(MA)5.2重量部、およびグリシジルメタクリレート(GMA)1.8重量部)と、t-ブチルハイドロパーオキサイド(BHP)0.035重量部との混合物をガラス製反応器内に、80分間かけて連続的に添加した。その後、BHP0.013重量部をガラス製反応器内に添加し、さらに1時間、ガラス製反応器内の混合物の撹拌を続けて重合を完結させた。以上の操作により、ポリマー粒子(A)および乳化剤を含むラテックス(L-1)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-1)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-1)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-1)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-1において、グラフトモノマーとして、エチルアクリレート(EA)9.2重量部、n-ブチルアクリレート(BA)2.0重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-2)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-2)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-2)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-2)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-1において、グラフトモノマーとして、エチルアクリレート(EA)11.2重量部およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-3)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-3)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-3)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-3)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-1において、グラフトモノマーとして、n-ブチルアクリレート(BA)4.0重量部、メチルアクリレート(MA)7.2重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-4)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-4)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-4)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-4)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-1において、グラフトモノマーとして、メチルアクリレート(MA)11.2重量部およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-5)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-5)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-5)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-5)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-1において、グラフトモノマーとして、メチルメタクリレート(MMA)6.2重量部、n-ブチルアクリレート(BA)5.0重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-6)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-6)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-6)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-6)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-1において、グラフトモノマーとして、n-ブチルアクリレート(BA)6.0重量部、メチルアクリレート(MA)4.0重量部、およびグリシジルメタクリレート(GMA)3.0重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-7)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-7)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-7)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-7)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を23重量%含んでいた。
製造例2-6において、ポリブタジエンゴムを主成分とする弾性体として、(R-3)を用いたこと以外は、製造例2-6と同様にして、ラテックス(L-8)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-8)に含まれるポリマー粒子(A)の体積平均粒子径は130nmであった。得られたラテックス(L-8)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-8)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-8において、グラフトモノマーとして、メチルメタクリレート(MMA)2.2重量部、n-ブチルアクリレート(BA)5.0重量部、スチレン(St)4.0重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-8と同様にして、ラテックス(L-9)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-9)に含まれるポリマー粒子(A)の体積平均粒子径は130nmであった。得られたラテックス(L-9)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-9)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。ポリマー粒子(A)のグラフト部は、Stに由来して、芳香族基を含む構成単位を含んでいた。
製造例2-1において、グラフトモノマーとして、メチルメタクリレート(MMA)10.2重量部、n-ブチルアクリレート(BA)1.0重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-10)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-10)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-10)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-10)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-1において、グラフトモノマーとして、メチルメタクリレート(MMA)9.2重量部、4-ヒドロキシブチルアクリレート(4HBA)2.0重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-11)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-11)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-11)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-11)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。ポリマー粒子(A)のグラフト部は、4HBAに由来して、水酸基を含む構成単位を含んでいた。
製造例2-1において、グラフトモノマーとして、2-メトキシエチルメタクリレート(MEMA)11.2重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-1と同様にして、ラテックス(L-12)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-12)に含まれるポリマー粒子(A)の体積平均粒子径は200nmであった。得られたラテックス(L-12)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-12)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。ポリマー粒子(A)のグラフト部は、MEMAに由来して、アルコキシ基を含む構成単位を含んでいた。
製造例2-8において、グラフトモノマーとして、メチルメタクリレート(MMA)10.2重量部、n-ブチルアクリレート(BA)1.0重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-8と同様にして、ラテックス(L-13)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-13)に含まれるポリマー粒子(A)の体積平均粒子径は130nmであった。得られたラテックス(L-13)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-13)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
製造例2-8において、グラフトモノマーとして、メチルメタクリレート(MMA)2.2重量部、n-ブチルアクリレート(BA)9.0重量部、およびグリシジルメタクリレート(GMA)1.8重量部を用いたこと以外は、製造例2-8と同様にして、ラテックス(L-14)を得た。単量体成分の重合転化率は96重量%以上であった。得られたラテックス(L-14)に含まれるポリマー粒子(A)の体積平均粒子径は130nmであった。得られたラテックス(L-14)における固形分濃度(ポリマー粒子(A)の濃度)は、ラテックス(L-14)100重量%に対して、30重量%であった。ポリマー粒子(A)のグラフト部は、グラフト部100重量%中、エポキシ基を有する構成単位を14重量%含んでいた。
1L混合槽の混合槽内の温度を30℃とした後、混合槽にメチルエチルケトン(MEK)126重量部を投入した。その後、混合槽内のMEKを撹拌しながら、混合槽に、ポリマー粒子(A)のラテックス(L-1)を143重量部投入した。投入された原料を均一に混合後、撹拌しながら、水200重量部(合計452重量部)を混合槽に80重量部/分の供給速度で投入した。水の供給終了後、速やかに撹拌を停止したところ、浮上性の凝集体を含むスラリー液を得た。
ポリマー粒子(A)のラテックスとして、ラテックス(L-2)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-2)を得た。樹脂組成物(A-2)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-3)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-3)を得た。樹脂組成物(A-3)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-4)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-4)を得た。樹脂組成物(A-4)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-5)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-5)を得た。樹脂組成物(A-5)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-6)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-6)を得た。樹脂組成物(A-6)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-7)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-7)を得た。樹脂組成物(A-7)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-8)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-8)を得た。樹脂組成物(A-8)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-9)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-9)を得た。樹脂組成物(A-9)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-10)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-10)を得た。樹脂組成物(A-10)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-11)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-11)を得た。樹脂組成物(A-11)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-12)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-12)を得た。樹脂組成物(A-12)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-13)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-13)を得た。樹脂組成物(A-13)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。
ポリマー粒子(A)のラテックスとして、ラテックス(L-14)を用いた以外は、実施例1と同じ方法にて、樹脂組成物(A-14)を得た。樹脂組成物(A-14)は、ポリマー粒子(A)とマトリクス樹脂(B)との合計を100重量%とした場合に、ポリマー粒子(A)を40重量%、マトリクス樹脂(B)を60重量%含んでいた。しかしながら、得られた樹脂組成物(A-14)は、脱気中にゲル化したため、50℃における粘度を測定することができなかった。
Claims (11)
- ポリマー粒子(A)およびマトリクス樹脂(B)を含み、
前記ポリマー粒子(A)はグラフト部を有し、
前記グラフト部は、
(i)(i-a)芳香族基を含む構成単位を含まないか、または
(i-b)前記グラフト部100重量%中、芳香族基を含む構成単位を0重量%超10重量%以下含み、
(ii)アルキルメタクリレートに由来する構成単位およびアルキルアクリレートに由来する構成単位の少なくとも一方を含み、
(iii)アルコキシ基を含む構成単位、アリールオキシ基を含む構成単位、オキセタン基を含む構成単位、水酸基を含む構成単位、アミノ基を含む構成単位、イミド基を含む構成単位、カルボン酸基を含む構成単位、カルボン酸無水物基を含む構成単位、環状エステル基を含む構成単位、環状アミド基を含む構成単位、ベンズオキサジン基を含む構成単位、およびシアン酸エステル基を含む構成単位を含まない、重合体であり、
前記グラフト部のガラス転移温度は、-25℃以上18℃以下である、樹脂組成物。 - 前記ポリマー粒子(A)と前記マトリクス樹脂(B)との合計を100重量%とした場合に、前記ポリマー粒子(A)が20重量%以上50重量%以下であり、前記マトリクス樹脂(B)が50重量%以上80重量%以下である、請求項1に記載の樹脂組成物。
- ポリマー粒子(A)およびマトリクス樹脂(B)を含み、
前記ポリマー粒子(A)はグラフト部を有し、
前記グラフト部は、前記グラフト部100重量%中、
(i)(i-a)芳香族基を含む構成単位を含まないか、または
(i-b)芳香族基を含む構成単位を0重量%超10重量%以下含み、
(ii)(ii-a)アルキルメタクリレートに由来する構成単位およびアルキルアクリレートに由来する構成単位の少なくとも一方を含み、かつ
(ii-b)当該アルキルメタクリレートに由来する構成単位および当該アルキルアクリレートに由来する構成単位の合計含有量が50重量%以上である、重合体であり、
前記グラフト部のガラス転移温度は、-25℃以上18℃以下であり、
前記ポリマー粒子(A)と前記マトリクス樹脂(B)との合計を100重量%とした場合に、前記ポリマー粒子(A)が20重量%以上50重量%以下であり、前記マトリクス樹脂(B)が50重量%以上80重量%以下である、樹脂組成物。 - 前記グラフト部は、芳香族基を含む構成単位を含まない、請求項1~3のいずれか1項に記載の樹脂組成物。
- 前記ポリマー粒子(A)の体積平均粒子径が0.15μm以上0.30μm以下である、請求項1~4のいずれか1項に記載の樹脂組成物。
- 前記グラフト部は、前記グラフト部100重量%中、エポキシ基を有する構成単位を0重量%超50重量%以下含む、請求項1~5のいずれか1項に記載の樹脂組成物。
- 前記グラフト部は、前記グラフト部100重量%中、ガラス転移温度が0℃以下である単独重合体を提供する単量体に由来する構成単位を20重量%以上含む、請求項1~6のいずれか1項に記載の樹脂組成物。
- 50℃における粘度が20,000mPa・s以下である、請求項1~7のいずれか1項に記載の樹脂組成物。
- 前記ポリマー粒子(A)と前記マトリクス樹脂(B)との合計を100重量%とした場合に、前記ポリマー粒子(A)が40重量%以上50重量%以下であり、
50℃における粘度が20,000mPa・s以下である、請求項1~8のいずれか1項に記載の樹脂組成物。 - さらに無機充填材を含む、請求項1~9のいずれか1項に記載の樹脂組成物。
- 前記マトリクス樹脂(B)がエポキシ樹脂である、請求項1~10のいずれか1項に記載の樹脂組成物。
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