WO2012033030A1 - 湿気硬化型反応性ホットメルト接着剤組成物 - Google Patents
湿気硬化型反応性ホットメルト接着剤組成物 Download PDFInfo
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- WO2012033030A1 WO2012033030A1 PCT/JP2011/070097 JP2011070097W WO2012033030A1 WO 2012033030 A1 WO2012033030 A1 WO 2012033030A1 JP 2011070097 W JP2011070097 W JP 2011070097W WO 2012033030 A1 WO2012033030 A1 WO 2012033030A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
- C09J171/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- 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
- C08K3/02—Elements
- C08K3/04—Carbon
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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- 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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
- C09D171/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1803—C3-(meth)acrylate, e.g. (iso)propyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1818—C13or longer chain (meth)acrylate, e.g. stearyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F230/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
- C08F230/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal
- C08F230/08—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon
- C08F230/085—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes
Definitions
- the present invention is a moisture curable reactive hot melt adhesive composition suitable for vehicle use, which does not contain a vinyl chloride resin, is excellent in adhesion to oil-surfaced steel sheets and electrodeposited steel sheets, and is effective in improving the production cycle. About.
- Patent Documents 1 to 4 propose an alternative to a vinyl chloride plastisol composition by a composition using a reactive silicon group-containing oxyalkylene polymer, and the polymer is used for vehicles. It is disclosed that when used, it is curable at room temperature and has rust and vibration resistance.
- An object of the present invention is a moisture curable reactive hot melt adhesive suitable for vehicle use, which does not contain a vinyl chloride resin, has excellent adhesion to oil-surfaced steel sheets and electrodeposited steel sheets, and is effective in improving the production cycle. It is to provide a composition.
- the present inventor has found that an oxyalkylene-based polymer having a reactive silicon group, a (meth) acrylic acid alkyl ester-based (co) polymer, a tackifier resin, It has been found that the above-mentioned problems can be solved by a moisture-curing reactive hot melt adhesive combined with a specific inorganic filler, and the present invention has been completed.
- the present invention (1).
- ( D) a moisture-curable reactive hot melt adhesive composition comprising at least one inorganic filler selected from the group consisting of calcium carbonate, carbon black, and silica, -SiR 1 3-a X a
- each R 1 is independently at least one selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms.
- the (meth) acrylic acid alkyl ester-based (co) polymer has a reactive silicon group represented by the following general formula (1), according to any one of (1) to (4)
- a moisture curable reactive hot melt adhesive composition suitable for vehicle use which does not contain a vinyl chloride resin, is excellent in adhesion to oil-surfaced steel sheets and electrodeposited steel sheets, and is effective in improving the production cycle. It is possible to provide things.
- the moisture-curable reactive hot melt adhesive of the present invention contains an oxyalkylene polymer (A) having a reactive silicon group as an essential component.
- the reactive silicon group is an organic group having a hydroxyl group or a hydrolyzable group bonded to a silicon atom.
- the oxyalkylene polymer (A) having a reactive silicon group has a characteristic that a siloxane bond is formed by a reaction accelerated by a silanol condensation catalyst and is crosslinked.
- the main chain skeleton of the oxyalkylene polymer (A) having a reactive silicon group is not particularly limited, and a conventionally known main chain skeleton can be used.
- the oxyalkylene polymer (A) has a repeating unit represented by —RO— (R represents a divalent alkylene group having 2 to 4 carbon atoms).
- R is not particularly limited as long as it is a divalent alkylene group having 2 to 4 carbon atoms.
- —CH (CH 3 ) CH 2 — is preferable because it is easily available.
- the oxyalkylene polymer may be composed of only one type of repeating unit or may be composed of a plurality of types of repeating units.
- the oxyalkylene polymer may be linear or branched, or a mixture thereof.
- the main chain skeleton may contain a repeating unit other than —R—O— (R represents a divalent alkylene group having 2 to 4 carbon atoms).
- the repeating unit other than —R—O— (where R represents a divalent alkylene group having 2 to 4 carbon atoms) is preferably 80% by weight or less, and 50% by weight or less in the polymer. Is more preferable.
- the repeating unit represented by —RO— (R represents a divalent alkylene group having 2 to 4 carbon atoms) is preferably present in the polymer in an amount of 50% by weight or more, and is present in an amount of 80% by weight or more. More preferably.
- the production method of the main chain skeleton of the oxyalkylene polymer is not particularly limited.
- (a1) initiators such as dihydric alcohols, polyhydric alcohols, various oligomers having a hydroxyl group, and alkalis such as KOH and NaOH.
- ring-opening polymerization of monoepoxide using a double metal cyanide complex catalyst in the method (a1) is preferable because a polymer having a narrow molecular weight distribution and a low viscosity can be obtained.
- the oxyalkylene polymer (A) having a reactive silicon group has a reactive silicon group represented by the following general formula (1).
- -SiR 1 3-a X a (1)
- each R 1 is independently at least one selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms.
- the hydrolyzable group represented by the general formula (1) X is not particularly limited and includes conventionally known hydrolyzable groups such as a hydrogen atom, a halogen atom, an alkoxy group, an acyloxy group, a ketoximate group, an amino group. Group, amide group, aminooxy group, mercapto group and the like.
- alkoxy groups such as a methoxy group, an ethoxy group, a propoxy group, and an isopropoxy group are preferable because they are mildly hydrolyzable and easy to handle.
- the hydroxyl group and hydrolyzable group present in the reactive silicon group may be the same or different. Further, the number of silicon atoms in the reactive silicon group may be one or two or more. In the case of a reactive silicon group in which silicon atoms are linked by a siloxane bond or the like, about 20 may be used.
- the reactive silicon group represented by the general formula (1) include a dimethoxymethylsilyl group, a diethoxymethylsilyl group, a diisopropoxymethylsilyl group, a trimethoxysilyl group, a triethoxysilyl group, a triethoxysilyl group, and a triethoxysilyl group.
- An isopropoxysilyl group etc. are mentioned.
- dimethoxymethylsilyl group, trimethoxysilyl group, and triethoxysilyl group are preferable because they have high activity and good curability can be obtained. Further, when melted at high temperature in the atmosphere, gelled products are hardly generated. Therefore, the dimethoxymethylsilyl group is most preferable.
- the average number of reactive silicon groups in the oxyalkylene polymer (A) is at least 0.8, preferably 0.8 to 3, more preferably 0.8 to 2.0. preferable.
- the average number of reactive silicon groups contained in one molecule of the polymer is 0.8 to 2.0, the balance between curability and the crosslinked structure is good, and the resulting cured product has good adhesion, It has mechanical properties.
- the reactive silicon group may be present at the molecular chain terminal of the oxyalkylene polymer (A) or may be present inside, but if the reactive silicon group is present at the molecular chain terminal, a good machine Since it becomes easy to obtain the hardened
- the method for introducing the reactive silicon group into the organic polymer is not particularly limited, and various methods can be used.
- An organic polymer having an unsaturated group by reacting an organic polymer having a functional group such as a hydroxyl group in the molecule with an organic compound having an active group and an unsaturated group that are reactive with the functional group.
- a monomer having an unsaturated group that does not participate in the polymerization reaction such as ring-opening copolymerization of an epoxide having an unsaturated group to obtain an unsaturated group-containing organic polymer when ring-opening polymerization of epoxide is performed to obtain an organic polymer Are copolymerized to obtain an organic polymer having an unsaturated group.
- the resulting reactive organism is reacted with hydrosilane having a reactive silicon group for hydrosilylation.
- a method of reacting a polymer having a hydroxyl group at a terminal with a compound having an isocyanate group and a reactive silicon group, or a polymer having an isocyanate group at a terminal, an amino group and a reactive silicon group is preferable because a high addition rate can be obtained in a relatively short reaction time.
- the oxyalkylene polymer obtained by such a reaction becomes a polymer having a group represented by the following general formula (2) together with a reactive silicon group.
- R 2 is at least one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms.
- the oxyalkylene polymer (A) having the group represented by the general formula (2) can be obtained by a method other than the above, for example, an aromatic such as toluene (tolylene) diisocyanate, diphenylmethane diisocyanate, and xylylene diisocyanate.
- aromatic such as toluene (tolylene) diisocyanate, diphenylmethane diisocyanate, and xylylene diisocyanate.
- Isocyanates aliphatic isocyanates such as isophorone diisocyanate and hexamethylene diisocyanate; and the like
- —RO— R represents a divalent alkylene group having 2 to 4 carbon atoms.
- R represents a divalent alkylene group having 2 to 4 carbon atoms.
- the method disclosed in JP-A-3-47825 can be mentioned.
- the compound having an isocyanate group and a reactive silicon group include, for example, ⁇ -isocyanatopropyltrimethoxysilane, ⁇ -isocyanatopropyltriethoxysilane, ⁇ -isocyanatopropylmethyldimethoxysilane, and ⁇ -isocyanatopropylmethyldiethoxy.
- silane etc. are mentioned, it is not limited to these.
- a hydrosilane compound is converted to a group 8 transition metal catalyst into an organic polymer having an unsaturated group represented by the following general formula (3).
- a method of reacting in the presence of is preferable.
- the group 8 transition metal catalyst include H 2 PtCl 6 ⁇ H 2 O, platinum-vinylsiloxane complex, platinum-olefin complex, and the like.
- —O—R 4 —CR 3 ⁇ CH 2 (3) wherein R 3 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R 4 is an alkylene group having 0 to 20 carbon atoms).
- R ⁇ 3 > as described in General formula (3) is hydrogen or a methyl group.
- the hydrosilane compound include halogenated silanes such as trichlorosilane, methyldichlorosilane, dimethylchlorosilane, and phenyldichlorosilane; trimethoxysilane, triethoxysilane, methyldimethoxysilane, methyldiethoxysilane, Alkoxysilanes such as phenyldimethoxysilane; acyloxysilanes such as methyldiacetoxysilane and phenyldiacetoxysilane; ketoximatesilanes such as bis (dimethylketoximate) methylsilane and bis (cyclohexylketoximate) methylsilane However, it is not limited to these. Among these, since the hydrolysis of the composition from which alkoxysilanes are obtained is gentle and easy
- a compound having a mercapto group and a reactive silicon group is introduced into an unsaturated bond site of an organic polymer by a radical addition reaction.
- a radical addition reaction for example, ⁇ -mercaptopropyltrimethoxysilane, ⁇ -mercaptopropyltriethoxysilane, ⁇ -mercaptopropylmethyldimethoxysilane, and ⁇ -mercaptopropylmethyldiethoxysilane.
- ⁇ -mercaptopropyltrimethoxysilane ⁇ -mercaptopropyltriethoxysilane
- ⁇ -mercaptopropylmethyldimethoxysilane ⁇ -mercaptopropylmethyldiethoxysilane.
- the polyoxyalkylene polymer having a reactive silicon group obtained by the method (b) is a composition having a lower viscosity and better workability than the polymer obtained by the method (a), and a urethane bond, This is preferable in that it does not have an organic group that lowers heat resistance such as a urea bond, and further does not use a compound having an isocyanate group that is problematic in toxicity.
- the method (a) is preferable in that the introduction of a silyl group into the polymer can be prepared inexpensively and with good productivity.
- the oxyalkylene polymer obtained by the methods (a), (b), and (c) may be used singly or in combination of several kinds.
- the number average molecular weight of the oxyalkylene polymer (A) is preferably 10,000 to 100,000 in terms of polystyrene-reduced number average molecular weight (Mn) by gel permeation chromatography (GPC) method, and preferably 10,000 to 45,000. 000 is more preferable, and 15,000 to 30,000 is particularly preferable because of excellent balance between handling and physical properties such as adhesion and mechanical properties.
- the ratio (Mw / Mn) between the weight average molecular weight (Mw) and the number average molecular weight (Mn) is not particularly limited, but is preferably 2.0 or less, and more preferably 1.6 or less. Further, it is particularly preferably 1.4 or less because the viscosity becomes low and handling becomes easy.
- the molecular weight distribution can be measured by various methods, but a method by gel permeation chromatography (GPC) is generally used.
- the moisture-curable reactive hot melt adhesive of the present invention comprises (B) (meth) acrylic acid alkyl ester-based (co) polymerization as an essential component.
- (Meth) acrylic acid alkyl ester-based (co) polymer (B) means one type of alkyl (meth) acrylate as a repeating unit.
- the description method “(meth) acrylic acid alkyl ester” refers to an acrylic acid alkyl ester and / or a methacrylic acid alkyl ester, and also has the same meaning in the subsequent description methods.
- the (meth) acrylic acid alkyl ester compound used as the repeating unit is not particularly limited and includes conventionally known compounds such as methyl acrylate, ethyl acrylate, n-propyl acrylate, and n-acrylic acid.
- the methacrylic acid ester compound is not particularly limited, and examples thereof include conventionally known compounds, such as methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, methacrylic acid.
- Tert-butyl acid Tert-butyl acid, n-hexyl methacrylate, 2-ethylhexyl methacrylate, decyl methacrylate, undecyl methacrylate, lauryl methacrylate, tridecyl methacrylate, myristyl methacrylate, cetyl methacrylate, stearyl methacrylate, behenyl methacrylate, methacryl Examples include acid biphenyl.
- the main chain skeleton of the (meth) acrylic acid alkyl ester-based (co) polymer (B) is substantially composed of one or more (meth) acrylic acid alkyl ester compounds. Consisting of the above compound means that the proportion of repeating units derived from the (meth) acrylic acid alkyl ester compound present in the (co) polymer (B) exceeds 50%. Moreover, the ratio of the repeating unit derived from the (meth) acrylic acid alkyl ester compound present in the (co) polymer (B) is preferably 70% or more.
- the molecular chain is substantially (b-1) an alkyl (meth) acrylate having an alkyl group having 1 to 8 carbon atoms.
- a copolymer comprising an ester compound and (b-2) a (meth) acrylic acid alkyl ester compound having an alkyl group having 10 or more carbon atoms hereinafter sometimes referred to as (co) polymer (B) -a). ) Is preferred.
- R 6 described in the general formula (4) is not particularly limited, and examples thereof include 1 to C carbon atoms such as a methyl group, ethyl group, propyl group, n-butyl group, t-butyl group, and 2-ethylhexyl group. There may be mentioned 8, preferably 1-4 alkyl groups, more preferably 1-2 alkyl groups.
- R 6 contained in the (co) polymer (B) -a is not necessarily limited to one kind of alkyl group.
- R 7 in the general formula (5) is not particularly limited, and for example, lauryl group, tridecyl group, cetyl group, stearyl group, alkyl group having 22 carbon atoms, biphenyl group and the like having 10 or more carbon atoms, usually Includes 10-30, preferably 10-20, long-chain alkyl groups. Note that R 7 contained in the (co) polymer (B) -a is not necessarily limited to one alkyl group.
- the molecular chain of the (co) polymer (B) -a consists essentially of the compounds (b-1) and (b-2), but here the substantial (b-1) and (b-2) )) Means that the proportion of repeating units derived from the compounds (b-1) and (b-2) present in the (co) polymer (B) -a exceeds 50%.
- the proportion of repeating units derived from the compounds (b-1) and (b-2) present in the (co) polymer (B) -a is preferably 70% or more.
- An oxyalkylene polymer having a reactive silicon group when the proportion of repeating units derived from the compounds (b-1) and (b-2) present in the (co) polymer (B) -a is less than 50%.
- the compatibility between the (A) and the (co) polymer (B) -a is decreased, and tends to become cloudy, and the adhesive properties of the cured product tend to decrease.
- the ratio of the repeating units derived from the compounds (b-1) and (b-2) present in the (co) polymer (B) -a is the weight ratio (derived from (b-1): (b- 2) Origin) is preferably 95: 5 to 40:60, more preferably 90:10 to 60:40.
- the ratio is larger than 95: 5, the compatibility is lowered, and when it is smaller than 40:60, the cost tends to be disadvantageous.
- the (co) polymer (B) may contain a repeating unit derived from a compound having copolymerizability with these.
- the compound having copolymerizability with the (meth) acrylic acid alkyl ester compound is not particularly limited, and examples thereof include acrylic acid such as acrylic acid and methacrylic acid; acrylamide, methacrylamide, N-methylolacrylamide, and N-methylolmethacrylamide.
- Amide groups such as, epoxy groups such as glycidyl acrylate and glycidyl methacrylate, compounds containing amino groups such as diethylaminoethyl acrylate, diethylaminoethyl methacrylate and aminoethyl vinyl ether; other acrylonitrile, styrene, ⁇ -methylstyrene, alkyl vinyl ether, vinyl chloride, And compounds derived from vinyl acetate, vinyl propionate, ethylene, and the like.
- the molecular weight of the (co) polymer (B) component is not particularly limited, but the number average molecular weight in terms of polystyrene in GPC is preferably 500 to 100,000, more preferably 1,000 to 50,000. Those having a molecular weight of 2,000 to 20,000 are particularly preferred because they are easy to handle and have excellent adhesive properties.
- the method for producing the (co) polymer (B) is not particularly limited, and examples thereof include a usual vinyl polymerization method, for example, a solution polymerization method using a radical reaction and a bulk polymerization method.
- the reaction is usually carried out at 50 to 150 ° C. by adding the above-mentioned compound, radical initiator, chain transfer agent, solvent and the like.
- radical initiator examples include azobisisobutyronitrile and benzoyl peroxide.
- chain transfer agents include mercaptans such as n-dodecyl mercaptan, t-dodecyl mercaptan, lauryl mercaptan, and halogen-containing compounds. Is mentioned.
- solvent for example, non-reactive solvents such as ethers, hydrocarbons and esters are preferably used.
- the (co) polymer (B) preferably has a reactive silicon group represented by the following general formula (1) because the cured product obtained has excellent adhesion and heat resistance.
- -SiR 1 3-a X a (1)
- each R 1 is independently at least one selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms.
- the reactive silicon group represented by the general formula (1) include a dimethoxymethylsilyl group, a diethoxymethylsilyl group, a diisopropoxymethylsilyl group, a trimethoxysilyl group, a triethoxysilyl group, a triethoxysilyl group, and a triethoxysilyl group.
- An isopropoxysilyl group etc. are mentioned.
- dimethoxymethylsilyl group, trimethoxysilyl group, and triethoxysilyl group are preferable because they have high activity and good curability can be obtained. Further, when melted at high temperature in the atmosphere, gelled products are hardly generated. Therefore, the dimethoxymethylsilyl group is most preferable.
- the method for introducing a reactive silicon group into the (co) polymer (B) is not particularly limited, and various methods are exemplified.
- (D) a method of copolymerizing a compound having a polymerizable unsaturated bond and a reactive silicon group together with the compounds (b-1) and (b-2),
- (E) after copolymerizing a compound having a polymerizable unsaturated bond and a reactive functional group (hereinafter referred to as Y ′ group) (for example, acrylic acid) together with the compounds (b-1) and (b-2),
- Y ′ group for example, acrylic acid
- the produced copolymer is reacted with a compound having a functional group capable of reacting with a reactive silicon group and a Y ′ group (hereinafter referred to as a Y ′′ group) (for example, a compound having an isocyanate group and a —Si (OCH 3 ) group).
- (F) a method of copolymerizing the compounds (b-1) and (b-2) in the presence of a mercaptan having a reactive silicon group as a chain transfer agent
- (G) a method of copolymerizing compounds (b-1) and (b-2) using an azobisnitrile compound or disulfide compound having a reactive silicon group as an initiator
- (H) a method in which the compounds (b-1) and (b-2) are polymerized by a living radical polymerization method, and a reactive silicon group is introduced into the molecular terminal.
- the compound having a polymerizable unsaturated bond and a reactive silicon group described in (d) is not particularly limited, and examples thereof include ⁇ -methacryloxypropyltrimethoxysilane, ⁇ -methacryloxypropylmethyldimethoxysilane, and ⁇ -methacryloxy.
- ⁇ -acryloxypropylalkyl such as propyltriethoxysilane, etc.
- ⁇ -methacryloxypropylalkylpolyalkoxysilane ⁇ -acryloxypropyltrimethoxysilane, ⁇ -acryloxypropylmethyldimethoxysilane, ⁇ -acryloxypropyltriethoxysilane, etc.
- Examples thereof include vinylalkyl polyalkoxysilanes such as polyalkoxysilane, vinyltrimethoxysilane, vinylmethyldimethoxysilane, and vinyltriethoxysilane.
- Examples of the Y ′ group and Y ′′ group described in (e) can be a combination of various groups.
- the Y ′ group an amino group, a hydroxyl group, and a carboxylic acid group can be used as the Y ′′ group. Mention may be made of isocyanate groups.
- the Y ′ group is an allyl group
- Y ′′ Examples of the group include a silicon hydride group (H—Si).
- the Y ′ group and the Y ′′ group can be bonded by a hydrosilylation reaction in the presence of a Group VIII transition metal.
- Examples of the mercaptan having a reactive silicon group used as the chain transfer agent described in (f) include ⁇ -mercaptopropyltrimethoxysilane, ⁇ -mercaptopropylmethyldimethoxysilane, and ⁇ -mercaptopropyltriethoxysilane. .
- the compounds (b-1) and (b-2) are made of a bifunctional radical polymerizable compound and a mercaptan having an alkoxysilyl group as a chain transfer agent. A method of copolymerization in the presence is also possible.
- Examples of azobisnitrile compounds and disulfide compounds having a reactive silicon group described in (g) include alkoxysilyl compounds described in, for example, JP-A-60-23405 and JP-A-62-70405. Examples thereof include azobisnitrile compounds having a group and disulfide compounds having an alkoxysilyl group.
- Examples of the method described in (h) include the methods described in JP-A No. 09-272714.
- the number of reactive silicon groups in the (co) polymer (B) is not particularly limited, and an average of 0.1 per molecule of the (co) polymer (B) from the viewpoint of the effect on adhesive force and cost.
- the number is from 4.0 to 4.0, and more preferably from 0.5 to 2.0.
- the mixing ratio of the reactive silicon group-containing oxyalkylene polymer (A) and the (co) polymer (B) in the composition of the present invention is 100 parts by weight of the total amount of ((A) + (B)).
- the component (A) is preferably 20 to 80 parts by weight
- the component (B) is preferably 80 to 20 parts by weight
- the component (A) is 40 to 60 parts by weight
- the component (B) is 60 to 40 parts by weight. More preferably.
- the (co) polymer (B) is less than 20 parts by weight, the adhesion of the obtained cured product to the substrate tends to be low.
- the (co) polymer (B) exceeds 80 parts by weight, the resulting cured product becomes brittle, and good adhesion and durability tend not to be obtained.
- the moisture curable reactive hot melt adhesive composition of the present invention comprises a tackifying resin as an essential component as the component (C).
- the tackifier resin (C) used in the present invention is not particularly limited, and those usually used can be used. Specific examples include terpene resins, aromatic modified terpene resins and hydrogenated terpene resins obtained by hydrogenation thereof, terpene-phenol resins obtained by copolymerizing terpenes with phenols, phenol resins, modified phenol resins, xylene-phenols.
- Resin cyclopentadiene-phenol resin, coumarone indene resin, rosin resin, rosin ester resin, hydrogenated rosin ester resin, xylene resin, low molecular weight polystyrene resin, styrene copolymer resin, petroleum resin (for example, C5 hydrocarbon) Resin, C9 hydrocarbon resin, C5C9 hydrocarbon copolymer resin, etc.), hydrogenated petroleum resin, DCPD resin and the like. These may be used alone or in combination of two or more.
- the styrene block copolymer and the hydrogenated product thereof are not particularly limited.
- styrene-butadiene-styrene block copolymer (SBS) styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene.
- SBS styrene-butadiene-styrene block copolymer
- SIS styrene-isoprene-styrene block copolymer
- SEBS butylene-styrene block copolymer
- SEPS styrene-ethylenepropylene-styrene block copolymer
- SIBS styrene-isobutylene-styrene block copolymer
- the tackifying resin (C) is for reducing the melting temperature at the time of heating and obtaining good coating properties, and for ensuring the compatibility of the oxyalkylene polymer (A) and the (co) polymer (B). Furthermore, it is added for the purpose of ensuring adhesion to various base materials.
- the amount of the tackifier resin (C) used is preferably 10 to 100 parts by weight with respect to 100 parts by weight of the total amount of the oxyalkylene polymer (A) and the (co) polymer (B), The amount is more preferably 90 parts by weight, and further preferably 30 to 80 parts by weight. If it is less than 10 parts by weight, the melt viscosity of the curable composition tends to be high, and there is a tendency that good workability cannot be obtained, and the adhesion of the obtained cured product to the substrate tends to be lowered. On the other hand, when the amount is more than 100 parts by weight, the heat-resistant adhesiveness tends to decrease or the curing rate tends to be slow.
- the moisture curable reactive hot melt adhesive composition of the present invention contains as an essential component at least one inorganic filler selected from the group consisting of calcium carbonate, carbon black and silica as component (D).
- Conventionally known calcium carbonates such as heavy calcium carbonate and colloidal calcium carbonate can be used without particular limitation.
- calcium carbonate treated with a fatty acid or a salt thereof, or a resin acid or a salt thereof is used, the adhesiveness to the oil surface steel plate tends to be good, which is preferable.
- heavy calcium carbonate is preferable because the viscosity becomes low when the moisture-curable reactive hot melt adhesive of the present invention is melted by heating.
- the amount of calcium carbonate used is 1 to 500 with respect to 100 parts by weight of the total amount ((A) + (B)) of the reactive silicon group-containing oxyalkylene polymer (A) and (co) polymer (B).
- the range of parts by weight is preferable, more preferably 10 to 300 parts by weight, still more preferably 50 to 300 parts by weight, and particularly preferably 100 to 300 parts by weight. If it is less than 1 part by weight, a sufficient effect on oil level adhesion cannot be obtained, and if it exceeds 300 parts by weight, the viscosity tends to be too high and handling tends to be difficult.
- the silica is not particularly limited, and conventionally known ones can be widely used. Among them, hydrophobic silica obtained by surface-treating the surface of silica particles with various treatment agents is particularly preferable because adhesion to an oil-surfaced steel plate is improved.
- Specific examples of the surface treatment agent include dimethyldichlorosilane, silicone oil, hexamethyldisilazane, octylsilane, hexadecylsilane, aminosilane, methacrylsilane, octamethylcyclotetrasiloxane, and polydimethylsiloxane. .
- Aerosil DT4 Aerosil NA200Y, Aerosil NA50H, Aerosil NA50Y, Aerosil NAX50, Aerosil R104, Aerosil R106, Aerosil R202, Aerosil R202W90, Aerosil R504, Aerosil R711, Aerosil R700, Aerosil R7200, Aerosil R805VV90, Aerosil R812, Aerosil R812S, Aerosil R816, Aerosil R8200, Aerosil R972, Aerosil R972V, Aerosil R974, Aerosil RA200HS, Aerosil RX200, Aerosil RX300Y, Aerosil RX200Y, Aerosil RR200Y 0 and the like.
- Silica is used in an amount of 1 to 50 weights per 100 weight parts of the total amount of reactive silicon group-containing oxyalkylene polymer (A) and (co) polymer (B) ((A) + (B)).
- the range of parts is preferred, more preferably 5 to 40 parts by weight. If it is less than 1 part by weight, a sufficient effect on oil level adhesion cannot be obtained, and if it exceeds 50 parts by weight, the viscosity tends to be too high and handling tends to be difficult.
- Carbon black is not particularly limited, and conventionally known ones such as channel black, furnace black, thermal black, lamp black and acetylene black can be widely used.
- the amount of carbon black used is 1 to 50 with respect to 100 parts by weight of the total amount ((A) + (B)) of the reactive silicon group-containing oxyalkylene polymer (A) and (co) polymer (B).
- the range of parts by weight is preferred, more preferably 5 to 40 parts by weight, and even more preferably 10 to 40 parts by weight. If it is less than 1 part by weight, a sufficient effect on oil level adhesion cannot be obtained, and if it exceeds 50 parts by weight, the viscosity tends to be too high and handling tends to be difficult.
- the curing catalyst is not particularly limited, and includes a silanol condensation catalyst that promotes a reaction of a commonly used reactive silicon group.
- a silanol condensation catalyst that promotes a reaction of a commonly used reactive silicon group.
- Titanium compounds such as diisopropoxytitanium; dibutyltin dilaurate, dibutyltin maleate, dibutyltin phthalate, dibutyltin dioctate, dibutyltin diethylhexanolate, dibutyltin dimethylmaleate, dibutyltin diethylmaleate, dibutyltin dibutylmaleate, dibutyl Tin dioctyl maleate, dibutyl tin ditridecyl maleate, dibutyl tin dibenzyl maleate, dibutyl tin diacetate, dioctyl tin diethyl maleate, dioctyl tin dioctyl maleate Dibutyltin dimethoxide, dibutyltin dinonylphenoxide, dibutenyltin oxide, dibutyltin diacetylacetonate, dibutyltin
- amine compounds In addition to the above compounds, amine compounds, acidic phosphate esters, reaction products of acidic phosphate esters with amine compounds, saturated or unsaturated polyvalent carboxylic acids or acid anhydrides thereof, carboxylic acid compounds and amines Examples include reactants such as salts with a series compound, lead octylate, and the like.
- the amine compound is not particularly limited, and for example, methylamine, ethylamine, propylamine, isopropylamine, butylamine, amylamine, hexylamine, octylamine, 2-ethylhexylamine, nonylamine, decylamine, laurylamine, pentadecylamine Aliphatic primary amines such as cetylamine, stearylamine, cyclohexylamine; dimethylamine, diethylamine, dipropylamine, diisopropylamine, dibutylamine, diamylamine, dihexylamine, dioctylamine, di (2-ethylhexyl) amine, didecylamine , Dilaurylamine, dicetylamine, distearylamine, methylstearylamine, ethylstearylamine, butylstearylamine, etc.
- Aliphatic secondary amines such as triamylamine, trihexylamine and trioctylamine; aliphatic unsaturated amines such as triallylamine and oleylamine; aniline, laurylaniline, stearylaniline, Aromatic amines such as triphenylamine; pyridine, 2-aminopyridine, 2- (dimethylamino) pyridine, 4- (dimethylaminopyridine), 2-hydroxypyridine, imidazole, 2-ethyl-4-methylimidazole, morpholine N-methylmorpholine, piperidine, 2-piperidinemethanol, 2- (2-piperidino) ethanol, piperidone, 1,2-dimethyl-1,4,5,6-tetrahydropyrimidine, 1,8-diazabicyclo (5,4 , 0) Undecene-7 (DBU), 6- (Di Butylamino) -1,8-diazabicyclo (5,4 , 0) Unde
- amidines such as 1,2-dimethyl-1,4,5,6-tetrahydropyrimidine, DBU, DBA-DBU and DBN
- guanidines such as guanidine, phenylguanidine and diphenylguanidine
- butylbiguanide, 1 Biguanides such as -o-tolyl biguanide and 1-phenyl biguanide are preferable because they exhibit high activity, and aryl group-substituted biguanides such as 1-o-tolyl biguanide and 1-phenyl biguanide can be expected to have high adhesiveness.
- aryl group-substituted biguanides such as 1-o-tolyl biguanide and 1-phenyl biguanide can be expected to have high adhesiveness.
- aryl group-substituted biguanides such as 1-o-tolyl biguanide and 1-phenyl biguanide can be expected to have high adhesiveness. preferable.
- An amine compound is basic, but an amine compound in which the conjugate acid has a pKa value of 11 or more is preferable because of its high catalytic activity. 1,2-dimethyl-1,4,5,6-tetrahydropyrimidine , DBU, DBN and the like are particularly preferable because the pKa value of the conjugate acid is 12 or more and high catalytic activity is exhibited.
- the carboxylic acids are not particularly limited, for example, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, tridecylic acid, myristic acid, Linear saturated fatty acids such as pentadecylic acid, palmitic acid, heptadecylic acid, stearic acid, nonadecanoic acid, arachidic acid, behenic acid, lignoceric acid, serotic acid, montanic acid, mellicic acid, and laxellic acid; undecylenic acid, lindelic acid, Zuric acid, fizeteric acid, myristoleic acid, 2-hexadecenoic acid, 6-hexadecenoic acid, 7-hexadecenoic acid, palmitoleic acid, petrothelic acid, oleic acid, elaidic acid,
- Fatty acids chloroacetic acid, 2-chloro Roakuriru acid, halogen-substituted derivatives of monocarboxylic acids such as chloroacetic acid and the like.
- Aliphatic dicarboxylic acids include adipic acid, azelaic acid, pimelic acid, suberic acid, sebacic acid, glutaric acid, oxalic acid, malonic acid, ethylmalonic acid, dimethylmalonic acid, ethylmethylmalonic acid, diethylmalonic acid, succinic acid 2,2-dimethylsuccinic acid, 2,2-diethylsuccinic acid, chain dicarboxylic acids such as 2,2-dimethylglutaric acid, 1,2,2-trimethyl-1,3-cyclopentanedicarboxylic acid, And saturated dicarboxylic acids such as acetic acid; unsaturated dicarboxylic acids such as maleic acid, fumaric acid, acetylenedicarboxylic acid, and it
- aliphatic polycarboxylic acid examples include chain tricarboxylic acids such as aconitic acid, citric acid, isocitric acid, 3-methylisocitric acid, and 4,4-dimethylaconitic acid.
- Aromatic carboxylic acids include benzoic acid, 9-anthracene carboxylic acid, atrolactic acid, anisic acid, isopropyl benzoic acid, salicylic acid, toluic acid, etc .; phthalic acid, isophthalic acid, terephthalic acid, carboxyphenyl And aromatic polycarboxylic acids such as acetic acid and pyromellitic acid.
- amino acids such as alanine, leucine, threonine, aspartic acid, glutamic acid, arginine, cysteine, methionine, phenylalanine, tryptophan, histidine and the like can be mentioned.
- carboxylic acid derivative etc. which produce carboxylic acid by hydrolysis of carboxylic anhydride, ester, amide, nitrile, acyl chloride, etc. can also be used.
- carboxylic acid used as the curing catalyst 2-ethylhexanoic acid, octylic acid, neodecanoic acid, oleic acid, naphthenic acid, etc. are easily available, inexpensive, and reactive silicon group-containing oxyalkylene heavy polymers. It is preferable from the viewpoint of good compatibility with the coalescence (A).
- the curing catalyst two or more different types of catalysts may be used in combination.
- an effect of improving curability may be obtained by using an amine compound and a carboxylic acid in combination. .
- the amount of the curing catalyst used is 0.001 to 100 parts by weight with respect to a total of 100 parts by weight of the reactive silicon group-containing oxyalkylene polymer (A) and the (meth) acrylic acid alkyl ester (co) polymer (B). It is preferably 20 parts by weight, more preferably 0.01 to 15 parts by weight, and particularly preferably 0.1 to 10 parts by weight. If the amount of the curing catalyst used is less than 0.001 part by weight, the curing rate may be insufficient, and the curing reaction may not proceed sufficiently. On the other hand, if the amount of the curing catalyst used exceeds 20 parts by weight, the curing rate is too fast, and the time for which the curable composition can be used tends to be short, resulting in poor workability and poor storage stability.
- a silane coupling agent in the curable composition of the present invention, a silane coupling agent, a reaction product of the silane coupling agent, or a compound other than the silane coupling agent can be added as an adhesiveness imparting agent or a dehydrating agent.
- the silane coupling agent include ⁇ -isocyanatopropyltrimethoxysilane, ⁇ -isocyanatopropyltriethoxysilane, ⁇ -isocyanatopropylmethyldiethoxysilane, ⁇ -isocyanatopropylmethyldimethoxysilane, ⁇ -isocyanatemethyltrimethoxysilane.
- Silanes containing isocyanate groups such as ⁇ -isocyanatomethyldimethoxymethylsilane; ⁇ -aminopropyltrimethoxysilane, ⁇ -aminopropyltriethoxysilane, ⁇ -aminopropylmethyldimethoxysilane, ⁇ -aminopropylmethyldiethoxysilane, N - ⁇ -aminoethyl- ⁇ -aminopropyltrimethoxysilane, N- ⁇ -aminoethyl- ⁇ -aminopropylmethyldimethoxysilane, N- ⁇ -aminoethyl- ⁇ -aminopropi Triethoxysilane, N- ⁇ -aminoethyl- ⁇ -aminopropylmethyldiethoxysilane, ⁇ -ureidopropyltrimethoxysilane, N-phenyl- ⁇ -aminopropyltrimethoxysilane, N-
- silane coupling agent used in the present invention is 0 with respect to a total of 100 parts by weight of the reactive silicon group-containing oxyalkylene polymer (A) and the (meth) acrylic acid alkyl ester (co) polymer (B). It is preferably used in the range of 1 to 20 parts by weight, particularly preferably in the range of 0.5 to 10 parts by weight.
- the moisture curable reactive hot melt adhesive of the present invention can contain other fillers, plasticizers, stabilizers and the like as necessary in addition to the above.
- fillers include, for example, magnesium carbonate, titanium oxide, diatomaceous earth, white clay, kaolin, clay, talc, wood powder, walnut shell powder, rice husk powder, silicic anhydride, quartz powder, aluminum powder. , Zinc powder, asbestos, glass fiber, carbon fiber, glass beads, alumina, glass balloon, shirasu balloon, silica balloon calcium oxide, magnesium oxide, silicon oxide and other inorganic fillers, pulp, cotton chips and other wood fillers, Organic fillers such as powder rubber, recycled rubber, fine powder of thermoplastic or thermosetting resin, and hollow bodies such as polyethylene can be mentioned.
- titanium oxide, kaolin, clay, and talc are high in initial cohesive strength of the resulting moisture-curable reactive hot melt adhesive, and can provide high initial adhesive strength, as well as good adhesion and heat resistance. It is preferable from the viewpoint of obtaining properties.
- fillers may be added alone or in combination of two or more.
- the blending amount is required to be 5 to 200 parts by weight with respect to 100 parts by weight of the total amount of the oxyalkylene polymer (A) and (co) polymer (B), More preferred is 50 to 180 parts by weight, and most preferred is 80 to 160 parts by weight.
- the blending amount exceeds 200 parts by weight, workability tends to decrease due to an increase in viscosity.
- the amount is less than 5 parts by weight, sufficient effects tend not to be obtained.
- plasticizer examples include, for example, phthalic acid esters such as dioctyl phthalate and diisodecyl phthalate; aliphatic dibasic acid esters such as dioctyl adipate; and epoxy plasticizers such as epoxidized soybean oil and epoxidized linseed oil Polyethers such as polypropylene glycol and derivatives thereof; vinyl polymers obtained by polymerizing vinyl monomers by various methods, and the like. These plasticizers may be used alone or in combination of two or more.
- the amount of the plasticizer used is preferably 5 to 100 parts by weight based on 100 parts by weight of the total amount of the oxyalkylene polymer (A) and the (co) polymer (B). More preferably. If it is less than 5 parts by weight, the effect as a plasticizer will not be exhibited, and if it exceeds 100 parts by weight, the mechanical strength of the cured product will be insufficient, or sufficient adhesive strength will not be obtained after coating.
- the stabilizer include an antioxidant, a light stabilizer, and an ultraviolet absorber.
- the weather resistance and heat resistance of the cured product can be improved.
- the antioxidant include hindered phenols, monophenols, bisphenols, and polyphenols, with hindered phenols being particularly preferred.
- the amount of the antioxidant used is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the total amount of the oxyalkylene polymer (A) and the (co) polymer (B). It is more preferable to use ⁇ 5 parts by weight.
- a light stabilizer is used, photooxidative deterioration of the cured product can be prevented.
- the light stabilizer include benzotriazole-based, hindered amine-based, and benzoate-based compounds, and hindered amine-based compounds are particularly preferable.
- the light stabilizer is preferably used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total amount of the oxyalkylene polymer (A) and the (co) polymer (B). It is more preferable to use ⁇ 5 parts by weight.
- ultraviolet absorber When using an ultraviolet absorber, the surface weather resistance of the cured product can be increased.
- ultraviolet absorbers include benzophenone, benzotriazole, salicylate, substituted tolyl, and metal chelate compounds, with benzotriazole being particularly preferred.
- the amount of the ultraviolet absorber used is preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the total amount of the oxyalkylene polymer (A) and the (co) polymer (B). It is more preferable to use ⁇ 5 parts by weight.
- a phenolic or hindered phenolic antioxidant it is preferable to use a phenolic or hindered phenolic antioxidant, a hindered amine light stabilizer and a benzotriazole ultraviolet absorber in combination.
- various additives may be added to the moisture curable reactive hot melt adhesive of the present invention as necessary for the purpose of adjusting various physical properties of the moisture curable reactive hot melt adhesive or cured product.
- additives include, for example, flame retardants, curability modifiers, radical inhibitors, metal deactivators, ozone degradation inhibitors, phosphorus peroxide decomposers, lubricants, pigments, foaming agents, Examples include solvents and fungicides. These various additives may be used alone or in combination of two or more.
- the moisture-curable reactive hot melt adhesive of the present invention can be prepared as a one-component type in which all the blended components are pre-blended and sealed and cured by moisture in the air after construction.
- Components such as a curing catalyst, a filler, a plasticizer, and water can be blended, and the compounding material and the polymer composition can be prepared as a two-component type that is mixed before use.
- the above-described components are blended and kneaded at room temperature or under heat using a mixer, roll, kneader or the like. Or by using a small amount of a suitable solvent, and dissolving and mixing the components.
- the moisture-curable reactive hot melt adhesive of the present invention uses a low-viscosity polymer, a polymer with high temperature sensitivity, or a resin, so that it can be applied at a relatively low temperature as a hot-melt adhesive. It is.
- the coating is preferably performed at a temperature of 60 to 180 ° C., more preferably 70 to 160 ° C., and particularly preferably 90 to 140 ° C. If the temperature is lower than 60 ° C, sufficient workability cannot be ensured. If the temperature is higher than 180 ° C, the stability of the moisture-curing reactive hot melt adhesive is reduced, or it cannot be used on substrates with low heat resistance. Is limited.
- the heating method is not particularly limited, and a conventionally known method can be used.
- the moisture-curable reactive hot melt adhesive of the present invention is used as a reactive hot melt adhesive for various uses and for bonding substrates.
- the use is not particularly limited, and examples thereof include construction, vehicles, electricity / electronics, textiles / leathers / clothing uses, etc. Among them, they are particularly suitable for vehicle uses.
- the composition of the present application is excellent in adhesion to the oil surface, and particularly excellent in adhesion to the oil surface steel plate.
- the oil surface steel plate include a cold rolled steel plate coated with an oil such as a rust preventive oil and a press oil, a galvanized steel plate, and an aluminum alloy.
- the coating method of the moisture curing type reactive hot melt adhesive of the present invention is not particularly limited, and a conventionally known method such as roll coater, die coater, bead coating, spraying, etc. can be used.
- the moisture-curable reactive hot melt adhesive of the present invention will be described based on examples.
- a synthesis example of the oxyalkylene polymer (A) having a reactive silicon group is shown below.
- methyldimethoxysilane 0.75 mol of methyldimethoxysilane is reacted in the presence of a platinum divinyldisiloxane complex with respect to 1 mol of the unsaturated group of this unsaturated group-terminated polyoxypropylene polymer to give a methyldimethoxysilyl group at the molecular end.
- An oxyalkylene polymer having a reactive silicon group having a number average molecular weight of 30,000 (polystyrene conversion value determined from GPC) and a molecular weight distribution of 1.20 was obtained (A-1).
- Example 1 Comparative Examples 1 and 2
- component (B) describes the solid content excluding toluene
- Toluene was devolatilized by heating under reduced pressure.
- the adhesion-imparting agent and the dehydrating agent shown in Table 1 were added and stirred for 5 minutes, and then the curing catalyst was added and stirred for 5 minutes.
- it was degassed under reduced pressure, and the metal container was filled with a one-component moisture-curing reactive hot melt adhesive. The following evaluation was performed using the obtained one-component moisture-curing reactive hot melt adhesive.
- Table 1 shows the obtained evaluation results.
- the moisture curable reactive hot melt adhesive of the present invention is used as a reactive hot melt adhesive for various purposes and for bonding substrates.
- the use is not particularly limited, and examples thereof include construction, vehicles, electricity / electronics, textiles / leathers / clothing uses, etc. Among them, they are particularly suitable for vehicle uses.
- the composition of the present application is excellent in adhesion to the oil surface, and particularly excellent in adhesion to the oil surface steel plate.
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Abstract
Description
そこで特許文献7に記載されるように、反応性ケイ素基含有オキシアルキレン系重合体を用いて、さらに油面接着性を改善した硬化性組成物が開示されている。しかしながら特許文献7に記載の組成物は硬化時間が遅く実用強度が得られるまで時間がかかるため、車両製造ラインの生産サイクルに十分適したものとは言えなかった。
(1).(A)下記一般式(1)で表される反応性ケイ素基を有するオキシアルキレン系重合体、(B)(メタ)アクリル酸アルキルエステル系(共)重合体、(C)粘着付与樹脂、(D)炭酸カルシウム、カーボンブラック、シリカからなる群より選択される少なくとも1種の無機充填剤、を含有することを特徴とする、湿気硬化型反応性ホットメルト接着剤組成物、
-SiR1 3-aXa (1)
(式中R1はそれぞれ独立に、炭素数1~20のアルキル基、炭素数6~20のアリール基、炭素数7~20のアラルキル基からなる群より選択される少なくとも1つである。Xは水酸基または加水分解性基である。aは1,2または3である。)
(2).(D)炭酸カルシウムが脂肪酸もしくはその塩、または樹脂酸もしくはその塩で処理された炭酸カルシウムであることを特徴とする(1)に記載の湿気硬化型反応性ホットメルト接着剤組成物、
(3).(D)炭酸カルシウムが脂肪酸もしくはその塩、または樹脂酸もしくはその塩で処理された重質炭酸カルシウムであることを特徴とする(1)、(2)のいずれかに記載の湿気硬化型反応性ホットメルト接着剤組成物、
(4).(D)シリカが疎水性シリカであることを特徴とする(1)~(3)のいずれかに記載の湿気硬化型反応性ホットメルト接着剤組成物、
(5).(B)(メタ)アクリル酸アルキルエステル系(共)重合体が下記一般式(1)で表される反応性ケイ素基を有することを特徴とする(1)~(4)のいずれかに記載の湿気硬化型反応性ホットメルト接着剤組成物、
-SiR1 3-aXa (1)
(式中R1、Xは前記に同じ。)
(6).ホットメルト接着剤組成物が油面鋼板用ホットメルト接着剤組成物であることを特徴とする、(1)から(5)のいずれかに記載の油面鋼板用湿気硬化型反応性ホットメルト接着剤組成物、
(7).無機充填剤(D)が疎水性シリカであることを特徴とする、(6)に記載の油面鋼板用湿気硬化型反応性ホットメルト接着剤組成物、
に関する。
(a2)水酸基末端ポリエーテル系重合体をKOH、NaOH、KOCH3、NaOCH3などの塩基性化合物の存在下、CH2Cl2、CH2Br2など2官能以上のハロゲン化アルキルと鎖延長反応させて得る方法、あるいは水酸基末端ポリエーテル系重合体を2つ以上のイソシアネート基を有する化合物と鎖延長反応させて得る方法などが挙げられる。
-SiR1 3-aXa (1)
(式中R1はそれぞれ独立に、炭素数1~20のアルキル基、炭素数6~20のアリール基、炭素数7~20のアラルキル基からなる群より選択される少なくとも1つである。Xは水酸基または加水分解性基である。aは1,2または3である。)。
-NR2-C(=O)- (2)
(式中、R2は水素原子、炭素数1~20のアルキル基、炭素数6~20のアリール基または炭素数7~20のアラルキル基からなる群より選択される少なくとも1つである。)。
-O-R4-CR3=CH2 (3)
(式中、R3は水素原子または炭素数1~10のアルキル基、R4は炭素数0~20のアルキレン基)。
本発明の湿気硬化型反応性ホットメルト接着剤は、(B)(メタ)アクリル酸アルキルエステル系(共)重合を必須成分とする。
CH2=C(R5)COOR6 (4)
(式中R5は水素原子またはメチル基、R6は炭素数1から8のアルキル基を示す)で示される。
CH2=C(R5)COOR7 (5)
(式中R5は一般式(4)の表記と同じ。R7は炭素数10以上のアルキル基を示す。) で示される化合物である。
-SiR1 3-aXa (1)
(式中R1はそれぞれ独立に、炭素数1~20のアルキル基、炭素数6~20のアリール基、炭素数7~20のアラルキル基からなる群より選択される少なくとも1つである。Xは水酸基または加水分解性基である。aは1,2または3である。)。
(ニ)、重合性不飽和結合と反応性ケイ素基を有する化合物を、化合物(b-1)、(b-2)とともに共重合させる方法、
(ホ)、重合性不飽和結合と反応性官能基(以下Y’基という)を有する化合物(例えば、アクリル酸)を化合物(b-1)、(b-2)とともに共重合させたのち、生成した共重合体を反応性ケイ素基およびY’基と反応しうる官能基(以下Y’’基という)を有する化合物(例えば、イソシアネート基と-Si(OCH3)基を有する化合物)と反応させる方法、
(へ)、連鎖移動剤として反応性ケイ素基を有するメルカプタンの存在下、化合物(b-1)、(b-2)を共重合させる方法、
(ト)、反応性ケイ素基を有するアゾビスニトリル化合物やジスルフィド化合物を開始剤として化合物(b-1)、(b-2)を共重合させる方法、
(チ)、リビングラジカル重合法によって化合物(b-1)、(b-2)を重合させ、分子末端に反応性ケイ素基を導入する方法、などが挙げられる。
数平均分子量2,000のポリオキシプロピレンジオールを開始剤とし、亜鉛ヘキサシアノコバルテートグライム錯体触媒を用いてプロピレンオキシドを重合することにより数平均分子量29,000(GPCより求めたポリスチレン換算値)のポリオキシプロピレンジオールを得た。得られたポリオキシプロピレンジオールとナトリウムメトキシドを反応させた後、塩化アリルを反応させて、末端水酸基を不飽和基に変換した。
数平均分子量2,000のポリオキシプロピレンジオールを開始剤とし、亜鉛ヘキサシアノコバルテートグライム錯体触媒を用いてプロピレンオキシドを重合することにより数平均分子量29,000(GPCより求めたポリスチレン換算値)のポリオキシプロピレンジオールを得た。得られたポリオキシプロピレンジオールの水酸基1モルに対してγ-イソシアネートプロピルトリメトキシシラン0.7モルを加えてウレタン化反応を行い、分子末端にトリメトキシシリル基を1.4個有する数平均分子量31,500(GPCより求めたポリスチレン換算値)、分子量分布が1.40の反応性ケイ素基を有するポリオキシアルキレン系重合体を得た(A-2)。
105℃に加熱したトルエン40g中に、メタクリル酸メチル67g、アクリル酸ブチル5g、メタクリル酸ステアリル15g、3-メタクリロキシプロピルメチルジメトキシシラン5g、γ-メルカプトプロピルメチルジメトキシシラン8g、および重合開始剤として2,2’-アゾビスイソブチロニトリル3gをトルエン15gに溶かした溶液を5時間かけて滴下した後、2時間撹拌した。さらに、2,2’-アゾビスイソブチロニトリル0.3gをトルエン10gに溶かした溶液を追加して2時間撹拌することにより、固形分濃度60重量%、数平均分子量が3,000(GPCより求めたポリスチレン換算値)、分子量分布が1.62、反応性ケイ素基を2.0個有するアクリル系共重合体を得た(B-1)。
105℃に加熱したトルエン40g中に、メタクリル酸メチル67g、アクリル酸ブチル5g、メタクリル酸ステアリル15g、3-メタクリロキシプロピルトリメトキシシラン5g、γ-メルカプトプロピルトリメトキシシラン8g、および重合開始剤として2,2’-アゾビスイソブチロニトリル3gをトルエン15gに溶かした溶液を5時間かけて滴下した後、2時間撹拌した。さらに、2,2’-アゾビスイソブチロニトリル0.3gをトルエン10gに溶かした溶液を追加して2時間撹拌することにより、固形分濃度60重量%、数平均分子量が3,100(GPCより求めたポリスチレン換算値)、分子量分布が1.66、反応性ケイ素基を1.9個有するアクリル系共重合体を得た(B-2)。
(実施例1~5、比較例1、2)
(A)、(B)、(C)、(D)成分、および安定剤を表1に示す割合で混合した後((B)成分はトルエンを除いた固形分の量を記載)、120℃での加熱減圧によりトルエンを脱揮した。次に表1に示す接着付与剤と脱水剤を添加して5分間攪拌し、続いて硬化触媒を添加して5分間攪拌した。最後に減圧脱泡し、金属容器に一液湿気硬化型反応性ホットメルト接着剤を充填した。得られた一液湿気硬化型反応性ホットメルト接着剤を用いて下記の評価を行った。
冷間圧延鋼板(JISG3141記載のダル仕上げタイプ)および、防錆油を塗布し垂直にして24時間放置した同冷間圧延鋼板へ、湿気硬化型反応性ホットメルト接着剤をビード状に塗布した後、23℃で7日間養生し、硬化物を引き剥がして接着状態を観察した。鋼板側へ接着剤が残った場合を○、残らなかった場合を×とした。
Claims (7)
- (A)下記一般式(1)で表される反応性ケイ素基を有するオキシアルキレン系重合体、(B)(メタ)アクリル酸アルキルエステル系(共)重合体、(C)粘着付与樹脂、(D)炭酸カルシウム、カーボンブラック、シリカからなる群より選択される少なくとも1種の無機充填剤、を含有することを特徴とする、湿気硬化型反応性ホットメルト接着剤組成物。
-SiR1 3-aXa (1)
(式中R1はそれぞれ独立に、炭素数1~20のアルキル基、炭素数6~20のアリール基、炭素数7~20のアラルキル基からなる群より選択される少なくとも1つである。Xは水酸基または加水分解性基である。aは1,2または3である。) - (D)炭酸カルシウムが脂肪酸もしくはその塩、または樹脂酸もしくはその塩で処理された炭酸カルシウムであることを特徴とする請求項1に記載の湿気硬化型反応性ホットメルト接着剤組成物。
- (D)炭酸カルシウムが脂肪酸もしくはその塩、または樹脂酸もしくはその塩で処理された重質炭酸カルシウムであることを特徴とする請求項1、2のいずれかに記載の湿気硬化型反応性ホットメルト接着剤組成物。
- (D)シリカが疎水性シリカであることを特徴とする請求項1~3のいずれかに記載の湿気硬化型反応性ホットメルト接着剤組成物。
- (B)(メタ)アクリル酸アルキルエステル系(共)重合体が、下記一般式(1)で表される反応性ケイ素基を有することを特徴とする請求項1~4のいずれかに記載の湿気硬化型反応性ホットメルト接着剤組成物。
-SiR1 3-aXa (1)
(式中R1、Xは前記に同じ。) - ホットメルト接着剤組成物が油面鋼板用ホットメルト接着剤組成物であることを特徴とする、請求項1から5のいずれかに記載の油面鋼板用湿気硬化型反応性ホットメルト接着剤組成物。
- 無機充填剤(D)が疎水性シリカであることを特徴とする、請求項6に記載の油面鋼板用湿気硬化型反応性ホットメルト接着剤組成物。
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WO2014101190A1 (en) * | 2012-12-31 | 2014-07-03 | 3M Innovative Properties Company | Adhesive mixture, adhesive, film including the same, and preparation method thereof |
CN103602304B (zh) * | 2013-11-11 | 2014-12-17 | 苏州毫邦新材料有限公司 | 湿气速固化组成物 |
JP2018524437A (ja) * | 2015-06-22 | 2018-08-30 | スリーエム イノベイティブ プロパティズ カンパニー | (メタ)アクリルポリマー及びアミノ酸架橋剤を含む感圧性接着剤 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN111601854A (zh) * | 2018-01-25 | 2020-08-28 | 思美定株式会社 | 形成方法、以及具有耐火性的一液常温湿气固化型反应性热熔组合物 |
CN111601854B (zh) * | 2018-01-25 | 2022-12-20 | 思美定株式会社 | 形成方法、以及具有耐火性的一液常温湿气固化型反应性热熔组合物 |
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CN103108934A (zh) | 2013-05-15 |
JPWO2012033030A1 (ja) | 2014-01-20 |
US20160032159A1 (en) | 2016-02-04 |
EP2615147B1 (en) | 2015-03-18 |
EP2615147A4 (en) | 2014-01-15 |
EP2615147A1 (en) | 2013-07-17 |
US20130225745A1 (en) | 2013-08-29 |
JP5844264B2 (ja) | 2016-01-13 |
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