JP5311529B2 - Curable composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a curable composition which has excellent storage stability and weather resistance without detriment to properties necessary as a sealing agent, an adhesive, or a coating material and can therefore be stored without detriment to curability and water-resistant adhesiveness. <P>SOLUTION: The curable composition contains (A) a crosslinkable silyl-containing organic polymer, (B) an acrylic polymer, (C) a compound which reacts with water to form an amine compound having at least one alkoxysilyl group in the molecule, and (D) a curing catalyst. It is desirable to use as component (A) a crosslinkable silyl-containing polyoxyalkylene polymer, a crosslinkable silyl-containing acrylic-modified polyoxyalkylene polymer and/or a crosslinkable silyl-containing methacrylic-modified polyoxyalkylene polymer. <P>COPYRIGHT: (C)2004,JPO

Description

  The present invention relates to a curable composition, and more particularly to a curable composition having excellent weather resistance and storage stability, preventing a decrease in curing characteristics after storage, and having improved water-resistant adhesion after storage. .

  The curable composition is used in various sealing materials, adhesives, and the like. For example, a moisture curable composition mainly composed of a modified silicone polymer and an alkoxysilyl group-containing acrylic polymer is used as a sealing material. ing. However, when the above composition is used as a building sealing material or an adhesive, it has been used by adding a plasticizer such as DOP, DINP, PPG, etc. in order to impart flexibility and workability. There was a problem with weather resistance. In order to improve the weather resistance, Patent Document 1 discloses a moisture curable composition comprising a modified silicone polymer and an alkoxysilyl group-containing acrylic polymer as main components and a solvent-free acrylic polymer having no functional group at room temperature. A composition is provided. However, although this composition has improved weather resistance, there may be a problem in adhesiveness, particularly water-resistant adhesion after storage.

  Furthermore, when using the modified silicone composition as described above, an aminosilane compound is usually added to improve adhesion, but a curable composition containing the modified silicone compound and an acrylic polymer. When an aminosilane compound is added to a product or a curable composition containing an alkoxysilyl group-containing acrylic polymer, there is a problem in that the curing characteristics after storage are adversely affected, for example, the curing rate becomes slow after storage.

Usually, a curable composition such as a sealing material is often stored for a long time until it is used after production, and the performance immediately after production is maintained even when the user uses the curable composition. It is particularly a problem that the performance such as adhesion and curing properties is greatly reduced after storage.
JP 2001-354846 A JP-A-52-73998 JP 55-9669 A JP 59-122541 A Japanese Unexamined Patent Publication No. 60-6747 JP-A-61-233043 Japanese Unexamined Patent Publication No. Sho 63-112642 JP-A-3-79627 JP-A-4-283259 JP-A-5-70531 JP-A-5-287186 Japanese Patent Laid-Open No. 11-80571 Japanese Patent Laid-Open No. 11-116763 JP-A-11-130931 JP 59-78223 A JP-A-60-228516 JP 59-168014 A JP 61-34067 A JP-A-61-133201 JP-A-6-221922 Japanese Patent Laid-Open No. 11-80250 Japanese Patent Laid-Open No. 11-80570 JP-A-11-323312 JP 2000-345136 A JP-A-1-297410 JP-A-7-305018 JP-A-8-127765 Japanese Patent Laid-Open No. 2001-40037 JP 2003-155469 A Japanese Examined Patent Publication No. 45-36319 Japanese Examined Patent Publication No. 46-12154 Japanese Examined Patent Publication No. 46-30711 Japanese Patent Publication No. 48-36960

  The present invention is superior in storage stability and weather resistance without impairing physical properties as a sealing material, an adhesive and a coating material, and prevents deterioration in curing characteristics after storage, and improved water-resistant adhesion after storage. An object is to provide a curable composition.

In order to solve the above problems, the first aspect of the curable composition which is the sealing material or adhesive composition for an outer wall of the present invention is (A) a crosslinkable silyl group-containing organic polymer, (B) a crosslink An acrylic polymer not containing a functional silyl group, (C) a compound that reacts with water to produce an amine compound having at least one alkoxysilyl group in one molecule, and (D) an outer wall containing a curing catalyst . A curable composition which is a sealing material or an adhesive composition, wherein the glass transition temperature of the component (B) is 10 ° C. or less, and the weight average molecular weight of the component (B) is 500 or more and 20,000 or less. characterized in that there.

  The second embodiment of the present curable composition comprises (A) a crosslinkable silyl group-containing organic polymer, (B) an acrylic polymer, and (C1) at least one alkoxysilyl group in one molecule by reacting with water. And an amine compound having (C2) a carbonyl compound, and (D) a curing catalyst.

  As the component (A), a crosslinkable silyl group-containing polyoxyalkylene polymer, a crosslinkable silyl group-containing acrylic modified polyoxyalkylene polymer, and / or a crosslinkable silyl group-containing methacryl-modified polyoxyalkylene polymer is used. It is preferable to use it.

  Use of (A1) a crosslinkable silyl group-containing acrylic polymer as the component (A) is preferable because weather resistance can be further improved.

  As the component (B), it is preferable to use a (meth) acrylic acid ester-fluoroolefin copolymer.

  In the third aspect of the present curable composition, (A1) a crosslinkable silyl group-containing acrylic polymer, (C) an amine compound having at least one alkoxysilyl group in one molecule by reacting with water. A compound and (D) a curing catalyst are contained.

  The fourth aspect of the present curable composition comprises (A1) a crosslinkable silyl group-containing acrylic polymer, (C1) an amine compound having at least one alkoxysilyl group in one molecule, (C2) a carbonyl compound, and (D) It contains a curing catalyst.

  It is preferable to further add (E) an epoxy resin to the first to fourth aspects of the curable composition because the water resistance can be improved.

  According to the present invention, it is excellent in storage stability and weather resistance without impairing physical properties required as a sealing material, an adhesive and a coating material such as workability and durability, and prevents a decrease in curing characteristics after storage; A curable composition having improved water-resistant adhesion after storage can be provided.

  Embodiments of the present invention will be described below, but these embodiments are exemplarily shown, and it goes without saying that various modifications can be made without departing from the technical idea of the present invention.

The 1st aspect of the curable composition of this invention is a curable composition containing the following component (A), (B), (C) and (D).
(A) Crosslinkable silyl group-containing organic polymer (B) Acrylic polymer (C) Compound that reacts with water to produce an amine compound having at least one alkoxysilyl group in one molecule (D) Curing catalyst

  With the curable composition of the present invention, it is possible to prevent a decrease in the curing characteristics after storage and to improve the water-resistant adhesion after storage. In the present invention, deterioration of curing characteristics such as curing speed after storage, hardness and thickness of the cured product is referred to as deterioration of curing characteristics.

  In the present invention, as the crosslinkable silyl group-containing organic polymer used as the component (A), conventionally known ones can be widely used. A rubber-like cured product is crosslinked by forming a siloxane bond in the molecule. There is no particular limitation as long as it is an organic polymer containing one or more silyl groups. Examples of the crosslinkable silyl group-containing organic polymer (A) include those disclosed in Patent Documents 2 to 14. Specifically, as the crosslinkable silyl group-containing organic polymer (A), a polyoxy group containing one or more crosslinkable silyl groups in the molecule and the main chain may each contain an organosiloxane. Examples thereof include an alkylene polymer, a vinyl-modified polyoxyalkylene polymer, a vinyl polymer, a polyester polymer, an acrylate polymer, a methacrylic acid ester polymer, a copolymer and a mixture thereof. It is preferable that 1-5 crosslinkable silyl groups are contained in a molecule | numerator from points, such as the sclerosis | hardenability of a sealing material, and the physical property after hardening. Further, the crosslinkable silyl group is preferably one represented by the following general formula (1) which is easy to crosslink and easy to produce.

Wherein R ¹ is a hydrocarbon group, preferably 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, and most preferably a methyl group. The reactive group shown is a group selected from a halogen atom, a hydrogen atom, a hydroxyl group, an alkoxy group, an acyloxy group, a ketoximate group, an amide group, an acid amide group, a mercapto group, an alkenyloxy group and an aminooxy group. In this case, X may be the same group or different groups, among which X is preferably an alkoxy group, most preferably a methoxy group, a is an integer of 0, 1 or 2, Is most preferred.)

  The main chain of the crosslinkable silyl group-containing organic polymer (A) has a polyoxyalkylene polymer and / or may contain an organosiloxane from the viewpoint of physical properties such as tensile adhesiveness after curing and modulus. A vinyl-modified polyoxyalkylene polymer is preferred. In particular, as component (A), one or more crosslinkable silyl groups in the molecule, the main chain may each contain an organosiloxane, a polyoxyalkylene polymer, an acrylic-modified polyoxyalkylene system Polymers and / or methacryl-modified polyoxyalkylene polymers, and mixtures thereof are preferred, and the main chain may contain an organosiloxane, and the polyoxypropylene polymer, acrylic-modified polyoxypropylene polymer More preferably, the polymer is a polymer and / or a methacryl-modified polyoxypropylene polymer.

  The vinyl-modified polyoxyalkylene polymer which may contain an organosiloxane and contains one or more crosslinkable silyl groups in the molecule contains one or more crosslinkable silyl groups in the molecule. In the presence of a polyoxyalkylene polymer that may contain an organosiloxane, one or more vinyl monomers are added by a conventional radical polymerization method such as addition of a radical polymerization initiator or ultraviolet irradiation. It can be obtained by polymerizing the body (Patent Document 15 and Patent Document 16 are cited as reference, but are not limited thereto).

  The vinyl monomer is a compound having one or more polymerizable unsaturated bonds in the molecule, for example, ethylene, propylene, isobutylene, butadiene, chloroprene, vinyl chloride, vinylidene chloride, acrylic acid, methacrylic acid. , Vinyl acetate, acrylonitrile, styrene, chlorostyrene, 2-methylstyrene, divinylbenzene, methyl acrylate, ethyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, benzyl acrylate, glycidyl acrylate , Methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl methacrylate, benzyl methacrylate, glycidyl methacrylate, acrylamide, methacrylate Amides, n-methylol acrylamide, ethoxylated phenol acrylate, ethoxylated paracumyl phenol acrylate, ethoxylated nonyl phenol acrylate, propoxylated nonyl phenol acrylate, 2-ethylhexyl carbitol acrylate, N-vinyl-2-pyrrolidone, isobornyl acrylate, ethoxy Bisphenol F diacrylate, ethoxylated bisphenol A diacrylate, ethoxylated isocyanuric acid diacrylate, tripropylene glycol diacrylate, pentaerythritol diacrylate monostearate, polyethylene glycol diacrylate, polypropylene glycol diacrylate, pentaerythritol triacrylate, tri Methylolpropane triacre relay , Ethoxylated isocyanuric acid triacrylate, propoxylated trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, ditrimethylolpropane tetraacrylate, pentaerythritol tetraacrylate, polyurethane diacrylate , Ω-carboxy-polycaprolactone monoacrylate, monohydroxyethyl acrylate phthalate, acrylic acid dimer, 2-hydroxy-3-phenoxypropyl acrylate, polyester polyacrylate, 1,6-hexanediol diacrylate, 2- (2-ethoxy Ethoxy) ethyl acrylate, stearyl acrylate, tetrahydrofur Ryl acrylate, lauryl acrylate, 2-phenoxy acrylate, isodecyl acrylate, isooctyl acrylate, tridecyl acrylate, caprolactone acrylate, zinc diacrylate, 1,3-butanediol diacrylate, 1,4-butanediol diacrylate, diethylene glycol di Acrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, propoxylated neopentyl glycol diacrylate, propoxylated glycerin triacrylate, ethoxylated pentaerythritol tetraacrylate, pentaacrylate ester, tetrahydrofurfuryl methacrylate, cyclohexyl methacrylate, isodecyl methacrylate , Lauryl metaclay , Polypropylene glycol dimethacrylate, triethylene glycol dimethacrylate, ethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, 1,4-butanediol dimethacrylate, diethylene glycol dimethacrylate, 1,6-hexanediol dimethacrylate, Neopentyl glycol dimethacrylate, 1,3-butanediol dimethacrylate, ethoxylated bisphenol A dimethacrylate, zinc dimethacrylate, trimethylolpropane trimethacrylate, and other compounds represented by the following chemical formulas (2) to (25) However, it is not limited to these.

  The vinyl monomer is used in the range of 0.1 to 1000 parts by weight, more preferably 1 to 200 parts by weight, based on 100 parts by weight of the polyoxyalkylene polymer that may contain organosiloxane. Is preferred. The vinyl-modified polyoxyalkylene polymer containing one or more crosslinkable silyl groups in the molecule and optionally containing an organosiloxane contains one or more crosslinkable silyl groups in the molecule. A crosslinkable polymer obtained by introducing a crosslinkable silyl group into a polyoxyalkylene polymer that may contain an organosiloxane and a polymer obtained by polymerizing at least one of the vinyl monomers. A blend of a functional silyl group-containing vinyl polymer can also be used.

  Moreover, weather resistance improves by using (A1) crosslinkable silyl group containing acrylic polymer as a component (A), and it is suitable. As the (A1) crosslinkable silyl group-containing acrylic polymer, conventionally known ones can be widely used, and are not particularly limited, but examples thereof include those disclosed in Patent Documents 12 and 17-24. . Specifically, the main chain is essentially (meth) acrylic acid, (meth) acrylic acid ester, which has one or more crosslinkable silyl groups in the molecule and may contain organosiloxane. Examples thereof include a composition comprising as a main component a compound that is a polymer obtained by (co) polymerizing one or more acrylic monomers such as (meth) acrylonitrile and (meth) acrylamide, and a mixture thereof. Although it does not specifically limit as said acrylic monomer, (meth) acrylic acid ester is preferable.

  Examples of the acrylate ester include methyl (meth) acrylate, ethyl (meth) acrylate, (meth) acrylate-n-propyl, isopropyl (meth) acrylate, (meth) acrylate-n-butyl, (Meth) acrylic acid isobutyl, (meth) acrylic acid s-butyl, (meth) acrylic acid t-butyl, (meth) acrylic acid-n-pentyl, (meth) acrylic acid neopentyl, (meth) acrylic acid-n- Hexyl, (meth) acrylic acid-n-heptyl, (meth) acrylic acid-n-octyl, (meth) acrylic acid 2-ethylhexyl, (meth) acrylic acid nonyl, (meth) acrylic acid decyl, (meth) acrylic acid Isodecyl, dodecyl (meth) acrylate, lauryl (meth) acrylate, tridecyl (meth) acrylate and (meth) Alkyl (meth) acrylates such as stearyl acrylate; alicyclic alkyl acrylates such as cyclohexyl (meth) acrylate, isobornyl (meth) acrylate and tricyclodecynyl (meth) acrylate; phenyl (meth) acrylate , Aromatic acrylic esters such as toluyl (meth) acrylate and benzyl (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxypropyl (meth) acrylate and (meth) Hydroxyalkyl (meth) acrylate such as ε-caprolactone addition reaction product of hydroxyethyl acrylate; 2-methoxyethyl (meth) acrylate, 3-methoxybutyl (meth) acrylate, 2-aminoethyl (meth) acrylate , Dimethylamino (meth) acrylate Examples include heteroatom-containing acrylic esters such as ethyl, chloroethyl (meth) acrylate, trifluoroethyl (meth) acrylate, trifluoromethyl methyl (meth) acrylate, and tetrahydrofurfuryl (meth) acrylate. Not limited to these. Moreover, you may use together 1 type, or 2 or more types of these. Among the above (meth) acrylic acid esters, butyl acrylate, 2-ethylhexyl acrylate and 2-methoxyethyl acrylate are preferred because a polymer having a low glass transition temperature is obtained.

  As the component (A1), in addition to the acrylic monomer, a monomer copolymerizable therewith can be copolymerized. The copolymerizable monomer is not particularly limited, and examples thereof include vinyl monomers such as fluoroolefins, α-olefins, vinyl esters and vinyl ethers. Further, as the component (A1), the crosslinkable silyl group-containing acrylic polymer and other polymers such as the above-mentioned crosslinkable silyl group-containing polyoxyalkylene polymer and crosslinkable silyl group-containing vinyl-modified polyoxy It is also possible to use a mixture with an alkylene polymer or the like, which is included in the present invention. When using the mixture of a crosslinkable silyl group containing acrylic polymer and another polymer, it is preferable that the mixture ratio of the crosslinkable silyl group containing acrylic polymer in a mixture is 30 mass% or more.

  In the present invention, the crosslinkable silyl group-containing organic polymer (A) has a number average molecular weight of 1000 or more, particularly 6,000 to 30,000, and a narrow molecular weight distribution, which is easy to handle because of its low viscosity before curing, and strength after curing. Physical properties such as elongation and modulus are preferred. The said component (A) may be used only by 1 type, and may be used together 2 or more types.

  In this invention, a weather resistance improves by containing the said (B) acrylic polymer. The said component (B) can also be used as a plasticizer. As the acrylic polymer used as the component (B), conventionally known acrylic polymers can be widely used. Acrylic polymers such as (meth) acrylic acid, (meth) acrylic acid ester, (meth) acrylonitrile, (meth) acrylamide, etc. Although it is not particularly limited as long as it is an acrylic (co) polymer obtained by polymerizing one or more selected from a monomer, a preferable example is a (meth) acrylate monomer as a main component, (Meth) acrylic acid ester having 1 to 20 carbon atoms in the ester moiety is exemplified. Examples include (meth) acrylic acid ester monomers as described above in component (A1), but are not limited thereto.

  The acrylic polymer (B) may not contain a crosslinkable silyl group or may contain a crosslinkable silyl group, and is not particularly limited. The average number in the molecule is preferably 0.05 or more and 2.0 or less, and particularly preferably 0.1 or more and 1.0 or less. The acrylic polymer having a crosslinkable silyl group is not particularly limited, and examples thereof include those disclosed in Patent Document 28 and Patent Document 29.

  Further, the acrylic polymer (B) can be copolymerized with a monomer copolymerizable therewith in addition to the acrylic monomer. Examples of the copolymerizable monomer include vinyl monomers such as fluoroolefins, α-olefins, vinyl esters and vinyl ethers. In particular, a (meth) acrylic acid ester-fluoroolefin copolymer having a (meth) acrylic acid ester monomer and a fluoroolefin monomer as main constituent monomers is preferably used. As the (meth) acrylic acid ester-fluoroolefin copolymer, conventionally known ones can be widely used, and examples thereof include those disclosed in Patent Documents 23 to 27. Examples of the fluoroolefin monomer include tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropylene, dichlorodifluoroethylene, trifluoroethylene, vinylidene fluoride, vinyl fluoride and perfluoro (alkyl vinyl ether). Among these, tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropylene and trifluoroethylene are preferable from the viewpoint of polymerizability, and tetrafluoroethylene, chlorotrifluoroethylene and trifluoroethylene are more preferable.

  The acrylic polymer (B) can be produced by a usual method such as suspension polymerization or emulsion polymerization in an aqueous medium, solution polymerization in an organic solvent, or bulk polymerization. As the organic solvent, those usually used can be used, for example, cyclic ethers such as tetrahydrofuran and dioxane; aromatic hydrocarbon compounds such as benzene, toluene and xylene; esters such as ethyl acetate and butyl acetate; acetone and methyl ethyl ketone And ketones such as cyclohexanone; alcohols such as methanol, ethanol and isopropanol, and the like, and one or more of these can be used.

  Examples of radical generating polymerization initiators used in the polymerization include peroxides such as diisopropyl peroxydicarbonate, tertiary butyl peroxypivalate, benzoyl peroxide, lauroyl peroxide and ditertiary butyl peroxide, or azobisiso An azo compound such as butyronitrile and azobisisovaleronitrile, and an inorganic peroxide such as ammonium persulfate and potassium persulfate can be used. Moreover, it is preferable not to use a chain transfer agent because it leads to a decrease in weather resistance.

  The polymerization is carried out at a polymerization temperature of 20 ° C. to 350 ° C., preferably 150 ° C. to 350 ° C. and a pressure of normal pressure to 10 MPa. In the case of pressurization, a pressure autoclave is used and the reaction time is 5 minutes to 20 hours. be able to. The polymerization method may be batch polymerization, semi-batch polymerization, or continuous polymerization.

  The glass transition temperature of the acrylic polymer (B) is preferably 10 ° C or lower, more preferably 0 ° C or lower, and even more preferably -10 ° C or lower. The weight average molecular weight is preferably 500 or more and 20,000 or less, and more preferably 700 or more and 10,000 or less. When the glass transition temperature is higher than 10 ° C., workability at low temperatures is deteriorated. On the other hand, when the weight average molecular weight exceeds 20,000, sufficient plasticity is not exhibited and workability is deteriorated. On the other hand, when the weight average molecular weight is less than 500, the low molecular weight polymer bleeds, resulting in a decrease in contamination.

  The blending ratio of the component (B) is not particularly limited, but it is preferable to use 1 to 400 parts by weight, preferably 5 to 200 parts by weight of the component (B) with respect to 100 parts by weight of the component (A). It is more preferable. The said acrylic polymer may be used independently and may be used together 2 or more types.

  Specific examples of the compound that reacts with water used as the component (C) to produce an amine compound having at least one alkoxysilyl group in one molecule include easy availability of raw materials, storage stability, water Preferred examples include ketimine compounds, enamine compounds, and / or aldimine compounds, which are amine compounds having at least one alkoxysilyl group in one molecule, from the standpoint of reactivity with.

  Each of the ketimine compound, enamine compound and aldimine compound can be obtained by a dehydration reaction between (C1) an amine compound having at least one alkoxysilyl group in one molecule and (C2) a carbonyl compound. The manufacturing method of the said component (C) is not specifically limited, A well-known method can be used.

  The dehydration product of the amine compound having at least one alkoxysilyl group in one molecule of the component (C1) and the component (C2) carbonyl compound will be described as follows. Component (C1) The amine compound having an alkoxysilyl group is not particularly limited, but primary and / or secondary amines having at least one alkoxysilyl group in one molecule are preferably used. Examples of the component (C1) include those represented by the following general formula (26).

[In the formula (26), n = 0, 1, 2, R ² and R ³ are the same or different and each is a hydrocarbon group having 1 to ⁴ carbon atoms, and R ⁴ is a hydrocarbon having 1 to 10 carbon atoms. The group Z represents a hydrogen atom or an aminoalkyl group having 1 to 4 carbon atoms. ]

Here, examples of R ² and R ³ include alkyl groups such as methyl, ethyl, propyl, and butyl, and alkenyl groups such as vinyl, allyl, propenyl, and butenyl, and alkyl groups are particularly preferable. Examples of R ⁴ include alkylene groups such as methylene, ethylene, propylene, and butylene, arylene groups such as phenylene, alkylene arylene groups, and the like, and alkylene groups are particularly preferable. n is preferably 0 or 1.

  Specific examples include compounds represented by the following formulas (27) to (34), N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane, N- (β-aminoethyl) -γ-aminopropyl. Examples include aminosilanes typified by methyldimethoxysilane. Among these, γ-aminopropyltrimethoxysilane, γ-aminopropylmethyldimethoxysilane, N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane and the like are preferable.

  Examples of the component (C2) carbonyl compound include known compounds such as acetaldehyde, propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-amylaldehyde, isohexaldehyde, diethylacetaldehyde, glyoxal, benzaldehyde, phenylacetaldehyde, and the like. Aldehydes; cyclic ketones such as cyclopentanone, trimethylcyclopentanone, cyclohexanone, methylcyclohexanone, trimethylcyclohexanone; acetone, methyl ethyl ketone, methyl propyl ketone, methyl isopropyl ketone, methyl isobutyl ketone, methyl tert-butyl ketone, diethyl ketone , Dipropyl ketone, diisopropyl ketone, dibutyl ketone, diisobutyl ketone, etc. And aromatic ketones such as acetophenone, benzophenone and propiophenone; and the following general formula (35 However, it is not limited to these. Of these, methyl isobutyl ketone, dipropyl ketone, phenylacetaldehyde, and β-dicarbonyl compounds having an active methylene group [compound represented by the following general formula (35)] are more preferred.

[Wherein, R ⁵ and R ⁶ are the same or different and each has an alkyl group having 1 to 16 carbon atoms (for example, methyl, ethyl, propyl, butyl, heptyl, hexyl, octyl, nonyl, decyl, undecyl, hexadecyl, etc. ), An aryl group having 6 to 12 carbon atoms (for example, phenyl, tolyl, hexyl, naphthyl, etc.) or an alkoxyl group having 1 to 4 carbon atoms (for example, methoxy, ethoxy, prooxy, putoxy, etc.). ]

  (C) The method for producing the compound that reacts with water to produce an amine compound having at least one alkoxysilyl group in one molecule may be any method, but the monomer purity is 50 to 95%, and amino The following method is desirable for producing a base blockage of 90% or more. In the reaction between an amine compound having an alkoxysilyl group and a carbonyl compound, the amine compound having an alkoxysilyl group is introduced into the carbonyl compound under heating, and water generated during the introduction is distilled off azeotropically with the carbonyl compound. In this case, it is preferable to react an excess amount of the carbonyl compound with the amine compound having an alkoxysilyl group.

  The introduction temperature (reaction temperature) of the amine compound having an alkoxysilyl group is preferably from about the azeotropic temperature of the carbonyl compound and water to about the reflux temperature of the carbonyl compound. It is preferable to introduce in this temperature range. For example, when methyl isobutyl ketone is used as the carbonyl compound and this is reacted with an amine compound having an alkoxysilyl group, the azeotropic temperature of methyl isobutyl ketone and water is about 80 ° C., and the reflux temperature of this methyl isobutyl ketone is Since it is 130 degreeC, the introduction temperature of the amine compound which has an alkoxy silyl group should just be 80-130 degreeC. The method for introducing an amine compound having an alkoxysilyl group for this reaction is arbitrary, but it is preferable to introduce it into a liquid in order to react it quickly with a carbonyl compound. This introduction time is also optional, but it is preferably about 30 minutes to 20 hours. In addition, since the reaction product hydrolyzes in the presence of moisture, the reaction is preferably performed under an inert gas such as nitrogen or argon, and the water content in the carbonyl compound should be reduced as much as possible. preferable.

  (C) As described above, the production of a compound that reacts with water to produce an amine compound having at least one alkoxysilyl group in one molecule is performed by adding an amine compound having an alkoxysilyl group to a carbonyl compound under heating. Introduced and reacted, water generated during the introduction is azeotropically distilled together with the carbonyl compound. Even after the introduction of the amine compound having an alkoxysilyl group, the water in the system is distilled off. Is preferably azeotropic distillation with a carbonyl compound.

  The distillation temperature is raised to the reflux temperature of the carbonyl compound, and the distillation is continued for about 30 minutes to 2 hours after the reflux temperature is reached, or from the system by concentration under reduced pressure immediately after the introduction of the amine compound having an alkoxysilyl group. It is preferable to distill off the unreacted carbonyl compound. If the distillation is continued for about 30 minutes to 2 hours after the reflux temperature is reached, water will disappear in the system, which is stable and hardly undergoes hydrolysis and condensation. However, the unreacted carbonyl compound is as fast as possible. It is preferable to distill from the system. The compound obtained by such a method that reacts with the target water to produce an amine compound having at least one alkoxysilyl group in one molecule is obtained with an alkoxysilane oligomer produced by hydrolysis condensation of an alkoxy group. Although obtained as a mixture, the amount of oligomer is smaller than that of conventional production methods, and the amount of residual amino groups is also small. In order to obtain this product with high purity, it is possible to distill and isolate a compound that reacts with this water to produce an amine compound having at least one alkoxysilyl group in one molecule. This is not desirable for use in the curable composition of the present invention because of the high cost and insufficient adhesion.

  (C) As a compound that reacts with water to produce an amine compound having at least one alkoxysilyl group in one molecule, the monomer purity obtained by the above method or the like is 50 to 95%, preferably 70 to 95. %, More preferably 80 to 95%, and an amino group blocking ratio of 90% or more, preferably 95% or more. When the monomer purity is lower than 50%, the storage stability of the composition is poor. When the monomer purity is higher than 95%, the adhesiveness of the composition is deteriorated. When the amino group blocking ratio is less than 90%, the storage stability of the composition is low. Is not preferable because of worsening.

  The blending ratio of the component (C) is not particularly limited, but is preferably about 0.01 to 20 parts by weight and more preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the component (A). preferable. These compounds that react with water to produce an amine compound having at least one alkoxysilyl group in one molecule may be used alone or in combination of two or more.

  The curing catalyst used as the component (D) is not particularly limited as long as it exhibits the action of a curing catalyst with respect to the component (A). Examples thereof include organometallic compounds and amines, and particularly silanols. It is preferable to use a condensation catalyst. Examples of the silanol condensation catalyst include stannous octoate, dibutyltin dioctoate, dibutyltin dilaurate, dibutyltin maleate, dibutyltin diacetate, dibutyltin diacetylacetonate, dibutyltin oxide, dibutyltin bistriethoxysilicate, dibutyltin distearate. Organotin compounds such as dioctyltin dilaurate, dioctyltin diversate, tin octylate and tin naphthenate; reactants of dibutyltin oxide and phthalate; titanates such as tetrabutyl titanate and tetrapropyl titanate; aluminum Organoaluminum compounds such as trisacetylacetonate, aluminum trisethylacetoacetate, diisopropoxyaluminum ethylacetoacetate; Co tetra acetylacetonate, chelate compounds such as titanium tetraacetyl acetonate; lead octylate; silanol condensation catalyst as known other acidic catalysts and basic catalysts, and the like. Of these, dibutyltin diacetylacetonate is particularly preferred because it is a liquid having a high crosslinking rate, toxicity and relatively low luminescence. Component (D) is blended in an amount of 0.1 to 30 parts by weight, particularly 0. It is preferable to use 5 to 20 parts by weight. These curing catalysts may be used alone or in combination of two or more.

  In order to improve water resistance, it is preferable to further add (E) an epoxy resin to the curable composition of the present invention. As the (E) epoxy resin, conventionally known ones can be widely used, and are not particularly limited, but it is more preferable to use a bisphenol type epoxy resin or an epoxy resin having a polyoxyalkylene skeleton. The epoxy resin having a polyoxyalkylene skeleton is not particularly limited as long as it has a polyalkylene oxide, but bisphenol A, bisphenol F, bisphenol AD, and an epoxy resin having a polyoxyalkylene unit including novolak and the like are more preferable. A suitable example is given.

  The compounding ratio of the (E) epoxy resin is preferably 1 to 200 parts by weight, more preferably 3 to 150 parts by weight with respect to 100 parts by weight of the component (A). This epoxy resin may be used independently and may use 2 or more types together.

  When adding the said component (E) epoxy resin, you may add ketimines etc. as a hardening | curing agent (epoxy resin hardening | curing agent) with respect to this epoxy resin. The said hardening | curing agent may be used independently and may be used together 2 or more types. Of course, it is possible to use a curing catalyst for the component (A) and a curing agent for the epoxy resin as the curing catalyst (D) and the curing agent.

  In addition to the above-described components, the curable composition of the present invention includes an adhesion-imparting agent, a physical property modifier, a filler, a plasticizer, a thixotropic agent, a dehydrating agent (storage stability improving agent), and an adhesive as necessary. Substances such as imparting agents, anti-sagging agents, ultraviolet absorbers, antioxidants, flame retardants, colorants, radical polymerization initiators, and various solvents such as toluene and alcohol may be blended, and other compatible heavy components. The coalescence may be blended.

  As the other compatible polymer, various polyethers are particularly preferable, and particularly, polyethers having a silicon functional group proposed in Patent Documents 1 and 30 to 33 can be mentioned.

  Examples of the adhesion-imparting agent include various silane coupling agents such as aminosilanes such as aminoethylaminopropyltrimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethylmethoxysilane, and γ-glycidoxypropyltrimethyl. Examples include epoxy silanes such as methoxysilane, acrylic silanes such as γ-methacryloxypropyltrimethoxysilane, mercaptosilanes such as γ-mercaptopropyltrimethoxysilane, and isocyanate silanes such as γ-isocyanatopropyltrimethoxysilane. It is done. The said adhesion grant agent may be used independently and may be used together 2 or more types.

  The physical property modifier is added for the purpose of improving the tensile physical properties. Examples of the physical property adjusting agent include a silicon compound having one silanol group in one molecule, and examples thereof include triphenylsilanol, trialkylsilanol, dialkylphenylsilanol, diphenylalkylsilanol, and the like. Various silane coupling agents such as silicon compounds that can be decomposed to produce a compound having one silanol group in one molecule, such as triphenylmethoxysilane, trialkylmethoxysilane, dialkylphenylmethoxysilane, diphenylalkylmethoxy Silane, triphenylethoxysilane, trialkylethoxysilane, etc. are mentioned. The physical property modifiers may be used alone or in combination of two or more.

  The filler is added for the purpose of reinforcing the cured product. Examples of the filler include calcium carbonate, magnesium carbonate, diatomaceous earth hydrous silicic acid, hydrous silicic acid, anhydrous silicic acid, calcium silicate, silica, titanium dioxide, clay, talc, carbon black, slate powder, mica, kaolin, and zeolite. Of these, calcium carbonate is preferable, and fatty acid-treated calcium carbonate is more preferable. In addition, glass beads, silica beads, alumina beads, carbon beads, styrene beads, phenol beads, acrylic beads, porous silica, shirasu balloons, glass balloons, silica balloons, saran balloons, acrylic balloons, etc. can be used. Among them, an acrylic balloon is more preferable from the viewpoint that the decrease in elongation after curing of the composition is small. The above fillers may be used alone or in combination of two or more.

  The plasticizer is added for the purpose of improving the elongation physical properties after curing or enabling low modulus. In the present invention, the component (B) can be used as a plasticizer, but other plasticizers may be added as necessary. Other plasticizers include, for example, phosphate esters such as tributyl phosphate and tricresyl phosphate; phthalate esters such as dioctyl phthalate (DOP), dibutyl phthalate, and butyl benzyl phthalate; fatty acids such as glycerin monooleate Monobasic acid esters; Fatty acid dibasic acid esters such as dibutyl adipate and dioctyl adipate; Glycol esters such as polypropylene glycol; Aliphatic esters; Epoxy plasticizers; Polyester plasticizers; Polyethers; And the like. The said plasticizer may be used independently or may use 2 or more types together.

  Examples of the thixotropic agent include inorganic thixotropic agents such as colloidal silica and asbestos powder, organic thixotropic agents such as organic bentonite, modified polyester polyol, and fatty acid amide, hydrogenated castor oil derivative, fatty acid amide wax, and aluminum stearylate. And barium stearylate. The thixotropic agents may be used alone or in combination of two or more.

  The dehydrating agent is added for the purpose of removing moisture during storage. Examples of the dehydrating agent include silane compounds such as vinyltrimethoxysilane, dimetholdimethoxysilane, tetraethoxysilane, methyltrimethoxysilane, and methyltriethoxysilane.

  The said antioxidant is used in order to prevent the hardening sealing material from oxidizing and to improve the weather resistance, and examples thereof include hindered amine-based and hindered phenol-based antioxidants. Examples of the hindered amine antioxidant include N, N ′, N ″, N ″ ′-tetrakis- (4,6-bis (butyl- (N-methyl-2,2,6,6-tetramethylpiperidine- 4-yl) amino) -triazin-2-yl) -4,7-diazadecane-1,10-diamine, dibutylamine 1,3,5-triazine N, N'-bis- (2,2,6 , 6-tetramethyl-4-piperidyl-1,6-hexamethylenediamine · N- (2,2,6,6-tetramethyl-4-piperidyl) butylamine polycondensate, poly [{6- (1, 1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl} {(2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2 , 2,6,6-tetramethyl-4- Peridyl) imino}], a polymer of dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, [bis (2,2,6,6-tetramethyl-decanedioic acid) 1 (octyloxy) -4-piperidyl) ester, reaction product of 1,1-dimethylethyl hydroperoxide and octane (70%)]-polypropylene (30%), bis (1,2,2,6,6- Pentamethyl-4-piperidyl) [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl] methyl] butyl malonate, methyl 1,2,2,6,6-pentamethyl-4-piperidyl seba Kate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate 1- [2- [3- (3,5-Di-tert-butyl-4-hydroxyphenyl) propionyloxy] ethyl] -4- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) ) Propionyloxy] -2,2,6,6-tetramethylpiperidine, 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 8-acetyl-3-dodecyl-7,7,9,9- Examples include, but are not limited to, tetramethyl-1,3,8-triazaspiro [4.5] decane-2,4-dione, etc. Examples of hindered phenol antioxidants include pentane. Erythritol-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], thiodiethylene-bis [3- (3,5-di-ter t-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], N, N′-hexane-1,6-diylbis [3- (3,5-di-tert-butyl-4-hydroxyphenylpropioamide), benzenepropanoic acid 3,5-bis (1,1-dimethylethyl) -4-hydroxy C7-C9 side chain alkyl ester, 2,4 -Dimethyl-6- (1-methylpentadecyl) phenol, diethyl [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl] methyl] phosphonate, 3,3 ', 3 ", 5 5 ', 5 "-hexane-tert-butyl-4-a, a', a"-(mesitylene-2,4,6-tolyl) tri-p-cresol, calci Mudiethylbis [[[3,5-bis- (1,1-dimethylethyl) -4-hydroxyphenyl] methyl] phosphonate], 4,6-bis (octylthiomethyl) -o-cresol, ethylenebis (oxyethylene) Bis [3- (5-tert-butyl-4-hydroxy-m-tolyl) propionate], hexamethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,3 , 5-Tris (3,5-di-tert-butyl-4-hydroxybenzyl) -1,3,5-triazine-2,4,6- (1H, 3H, 5H) -trione, N-phenylbenzenamine Product of 2,4,4-trimethylpentene with 2,6-di-tert-butyl-4- (4,6-bis (octylthio) -1,3,5 Triazin-2-ylamino) phenol and the like, but not limited thereto. The said antioxidant may be used independently or may use 2 or more types together.

  The ultraviolet absorber is used for preventing the photo-degradation of the cured sealant and improving the weather resistance. For example, the ultraviolet absorber of benzotriazole, triazine, benzophenone, benzoate, etc. Etc. Examples of the ultraviolet absorber include 2,4-di-tert-butyl-6- (5-chlorobenzotriazol-2-yl) phenol and 2- (2H-benzotriazol-2-yl) -4,6- Di-tert-pentylphenol, 2- (2H-benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol, methyl 3- (3- (2H-benzotriazole-2) -Yl) -5-tert-butyl-4-hydroxyphenyl) propionate / polyethylene glycol 300 reaction product, 2- (2H-benzotriazol-2-yl) -6- (linear and side chain dodecyl) -4 -Benzotriazole ultraviolet absorbers such as methylphenol, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(he Sil) oxy] -phenol and the like triazine ultraviolet absorbers, benzophenone ultraviolet absorbers such as octabenzone, 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate, etc. Examples include, but are not limited to, benzoate ultraviolet absorbers. The said ultraviolet absorber may be used independently or may use 2 or more types together.

  The second aspect of the present curable composition includes (A) a crosslinkable silyl group-containing organic polymer, (B) an acrylic polymer, (C1) an amine compound having at least one alkoxysilyl group in one molecule, It contains (C2) a carbonyl compound and (D) a curing catalyst.

  The components (A), (B) and (D) are as described above in the first embodiment of the curable composition of the present invention. What is necessary is just to perform the mixture ratio of a component (B) and (D) similarly to the 1st aspect of the above-mentioned curable composition of this invention, respectively. Component (C1) and Component (C2) are each an amine compound having at least one alkoxysilyl group in one molecule and a carbonyl compound mentioned in Component (C) of the first embodiment of the curable composition of the present invention. Can be used as well. In the second aspect of the curable composition, components (C1) and (C2) are dehydrated in the formulation. The dehydration reaction may be carried out by a reaction treatment such as a heat treatment as necessary, but can be progressed over time without performing a special step. The blending ratio of the components (C1) and (C2) is not particularly limited, but the components (C1) and (C2) are 0.05 to 50 parts by weight, particularly 0. It is preferable to mix | blend so that it may become 1-20 weight part. Further, [molar amount of component (C1)] / [molar amount of component (C2)] is preferably in the range of 0.1 to 5.0, and preferably in the range of 0.5 to 2.0. Further preferred. The amine compound and carbonyl compound having an alkoxysilyl group may be used alone or in combination of two or more. You may add the above plasticizers as needed. It is the same as that of a 1st aspect also about compounds other than the said component.

  The third aspect of the present curable composition comprises a component (A1) a crosslinkable silyl group-containing acrylic polymer, a component (C) an amine compound that reacts with water and has at least one alkoxysilyl group in one molecule. It contains a compound to be formed and a component (D) curing catalyst. The components (A1), (C) and (D) are as described above in the first embodiment of the curable composition of the present invention. Moreover, what is necessary is just to perform the mixture ratio of each component similarly to the 1st aspect of the above-mentioned curable composition of this invention. You may add the above plasticizers as needed. The same applies to blends other than the above components.

  The fourth embodiment of the present curable composition comprises component (A1) a crosslinkable silyl group-containing acrylic polymer, component (C1) an amine compound having at least one alkoxysilyl group in one molecule, and component (C2) carbonyl. It contains a compound and a component (D) curing catalyst. The components (A1) and (D) are as described above in the first embodiment of the curable composition of the present invention, and the blending ratio of the component (D) is also the first of the curable composition of the present invention described above. What is necessary is just to carry out similarly to the aspect. The components (C1) and (C2) are as described above in the second aspect of the curable composition, and the blending ratio of the components (C1) and (C2) is also the second of the curable composition described above. What is necessary is just to carry out similarly to the aspect. You may add the above plasticizers as needed. The same applies to blends other than the above components.

  The curable composition of the present invention can be a one-component type or a two-component type as required, but can be suitably used particularly as a one-component type. The curable composition of the present invention is suitably used as a sealing material, an adhesive, a coating material, and the like. Since the curable composition of the present invention has excellent storage stability, adhesiveness and weather resistance without impairing the basic performance, the curing characteristics after storage and the water-resistant adhesiveness are not reduced, especially the outer wall However, it can be used for various other buildings, automobiles, civil engineering, electrical / electronic fields, and the like.

  The present invention will be described more specifically with reference to the following examples. However, it is needless to say that the examples are shown by way of example and should not be interpreted in a limited manner.

(Synthesis Example 1)
As the crosslinkable silyl group-containing acrylic polymer (A1), a crosslinkable silyl group-containing acrylic acid ester-fluoroolefin copolymer was synthesized based on the following method. In a 2 liter autoclave equipped with a stirrer, 135 g of butyl acetate and 75 g of ethanol as an organic solvent, 6.9 g of butyl acrylate, 7.0 g of 2-methoxyethyl acrylate, and vinyltrimethoxysilane 1. 0 g and 4.0 g of ethoxyethyl peroxydicarbonate as a radical polymerization initiator were charged, degassing and nitrogen substitution were repeated three times, then degassing under reduced pressure, and 510 g of chlorotrifluoroethylene was charged. The temperature was raised to 50 ° C. to initiate polymerization, and after raising the temperature for 1 hour, a mixed solution of 62.4 g of butyl acrylate, 63.0 g of 2-methoxyethyl acrylate and 9.0 g of vinyltrimethoxysilane was added for 7 hours. The mixture was fed into the autoclave using a pump at a constant speed. After 8 hours from the start of polymerization, the temperature was raised to 60 ° C. and polymerization was carried out for a total of 10 hours, followed by cooling. After completion of the reaction, unreacted chlorotrifluoroethylene was purged and the autoclave was opened to obtain a copolymer solution. The obtained solution was filtered to remove sodium borate and then dried under reduced pressure, put into methanol, washed and dried to obtain 245 g of a copolymer.

Example 1
As shown in Table 1, crosslinkable silyl group-containing polyoxypropylene polymer as component (A) crosslinkable silyl group-containing organic polymer, hydroxyl group-free acrylic polymer as component (B) acrylic polymer, aging A predetermined amount of each of the inhibitor, calcium carbonate, and vinyltrimethoxysilane was charged, and the mixture was heated and vacuum mixed and stirred at 110 ° C. for 2 hours to dehydrate the compounded material. Furthermore, a predetermined amount of ketimine structure-containing aminosilane as a compound that reacts with component (C) water to produce an amine compound having at least one alkoxysilyl group in one molecule and dibutyltin diacetylacetonate as component (D) curing catalyst The curable composition was prepared by adding and mixing with stirring.

The amount of each compounding substance in Table 1 is indicated by (g), and * 1 to * 13 are as follows.
* 1: Crosslinkable silyl group-containing polyoxypropylene polymer (manufactured by Kaneka Chemical Co., Ltd., trade name: MS polymer S303)
* 2: Crosslinkable silyl group-containing acrylic modified polyoxypropylene polymer (manufactured by Kaneka Chemical Co., Ltd., trade name: MS polymer S903)
* 3: Crosslinkable silyl group-containing acrylic polymer obtained in Synthesis Example 1 * 4: Hydroxyl group-free acrylic polymer (trade name: UP-1110, manufactured by Toagosei Co., Ltd.)
* 5: Hydroxyl group-containing acrylic polymer (manufactured by Toagosei Co., Ltd., trade name: UH-2000)
* 6: Acrylic ester-fluoroolefin copolymer (manufactured by Toagosei Co., Ltd., trade name: XCS-3500)
* 7: Ketimine structure-containing aminosilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name: X12-817)
* 8: γ-aminopropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name: KBM-903)
* 9: N-β (aminoethyl) γ-aminopropyltrimethoxysilane * 10: Methyl isobutyl ketone * 11: Dibutyltin diacetylacetonate * 12: Anti-aging agent manufactured by Ciba Specialty Chemicals Co., Ltd. : Tinuvin B75
* 13: Fatty acid-treated calcium carbonate (Maruo Calcium Co., Ltd., trade name: Calfine 200M)

(Examples 2 and 3)
As shown in Table 1, instead of the crosslinkable silyl group-containing polyoxypropylene polymer, the crosslinkable silyl group-containing acrylic modified polyoxypropylene polymer (A1) or the copolymer (A1) obtained in Synthesis Example 1 was used. A curable composition was prepared in the same manner as in Example 1 except that it was blended.

(Examples 4 and 5)
As shown in Table 1, curable properties were obtained in the same manner as in Example 1 except that a hydroxyl group-containing acrylic polymer or an acrylate ester-fluoroolefin copolymer was blended in place of the hydroxyl group-free acrylic polymer. A composition was prepared.

( Experimental example 1 )
As shown in Table 1, the copolymer obtained in Synthesis Example 1 above as the component (A1) crosslinkable silyl group-containing acrylic polymer, anti-aging agent, calcium carbonate, vinyltrimethoxysilane and dioctyl phthalate were placed in place. A fixed amount was charged and mixed under heating and reduced pressure at 110 ° C. for 2 hours to dehydrate the compounded material. Furthermore, ketimine structure-containing aminosilane as component (C) and dibutyltin diacetylacetonate as component (D) were added and stirred to prepare a curable composition.

( Experimental example 2 )
As shown in Table 1, as component (A1), instead of 100 parts by weight of the copolymer obtained in Synthesis Example 1, 70 parts by weight of the copolymer obtained in Synthesis Example 1 and a crosslinkable silyl group-containing polyoxy A curable composition was prepared in the same manner as in Experimental Example 1 , except that 30 parts by weight of the propylene polymer was blended.

( Experimental example 3 )
As shown in Table 1, a curable composition was prepared in the same manner as in Example 2, except that an aminosilane compound and methyl isobutyl ketone were blended in place of the ketimine structure-containing aminosilane.

( Experimental example 4 )
As shown in Table 1, a curable composition was prepared in the same manner as in Experimental Example 1 , except that an aminosilane compound and methyl isobutyl ketone were blended in place of the ketimine structure-containing aminosilane.

(Comparative Example 1)
As shown in Table 1, a curable composition was prepared in the same manner as in Example 1 except that an aminosilane compound was blended in place of the ketimine structure-containing aminosilane.

[performance test]
The following performance tests were performed on the curable compositions obtained in Examples 1 to 5, Experimental Examples 1 to 4, and Comparative Example 1. In addition, 28 days and 50 days at 50 ° C. correspond to 6 to 8 months and 12 to 16 months at room temperature (20 ° C.). Table 2 shows the measurement results of each performance.

1) Tensile adhesiveness Tested in accordance with "4.21 Tensile adhesiveness test" of JIS A1439: 1997 "Testing method of sealing material for building" (test temperature 23 ° C). In addition, the test body was prepared by placing the above-obtained curable composition (immediately after production and after storage for 28 days at 50 ° C. for 56 days) on anodized aluminum as an adherend at 23 ° C. and 50% relative It was prepared by curing at humidity for 14 days and at 30 ° C. for 14 days. Moreover, about water-resistant adhesiveness, after destroying the test body created on the said conditions for 7 days in 23 degreeC water, the destruction state was evaluated and it showed as adhesiveness.
Judgment criteria for adhesion: A: Cohesive failure, O: When thin layer cohesive failure is confirmed, Δ: When interface fracture is confirmed.

2) Touch-drying time retention rate The touch-drying time was measured according to JIS A 1439 4.19. Judgment method is measured results at 50 ° C. for 28 days or 56 days after storage / immediately after production is less than 1.3, ◯ is 1.3 or more and less than 1.6, 1.6 or more and less than 1.9 is Δ, 1.9 or more was set as x.

3) Rubber hardness retention rate 23 hours 50% relative humidity atmosphere 24 hours passed as a test body, stacked so that the thickness is 5mm or more, JIS K 6301 5.2 Spring type hardness tester A type And measured. The determination method is 28 days or 56 days of the measurement result after storage / immediately after production is less than 0.5 x, 0.5 to less than 0.7 Δ, 0.7 to less than 0.9 ○, 0.9 A value of 1.0 or less was evaluated as “◎”.

4) Weather resistance According to JIS K6266: 1996, the state of the surface of the sealing material was visually determined after 1000 hours, 2000 hours, 3000 hours, 5000 hours, and 7000 hours using a sunshine weatherometer.
Criteria: ○: No hair cracks on the surface of the sealing material, Δ: Some hair cracks on the surface of the sealing material, ×: Many hair cracks on the surface of the sealing material.

As shown in Table 2, in Examples 1 to 5 , the adhesiveness after storage at 50 ° C. for 28 days and 56 days was improved both at the initial stage and after the water resistance test, and the touch drying time and rubber hardness immediately after production. Was maintained after storage at 50 ° C. for 28 days and 56 days. On the other hand, in Comparative Example 1, the adhesiveness immediately after production was good, but as the storage days passed, the adhesiveness, especially the adhesiveness after the water resistance test was reduced, and the curing characteristics after storage were also lowered. It was. Examples 2 and 3 were particularly improved in weather resistance.

Claims (5)

(A) a crosslinkable silyl group-containing organic polymer,
(B) an acrylic polymer containing no crosslinkable silyl group,
(C) Curability that is a sealing material or adhesive composition for an outer wall containing a compound that reacts with water to produce an amine compound having at least one alkoxysilyl group in one molecule, and (D) a curing catalyst A composition comprising:
The glass transition temperature of the component (B) is 10 ° C. or less,
The curable composition which is a sealing material or an adhesive composition for an outer wall, wherein the component (B) has a weight average molecular weight of 500 or more and 20,000 or less .   The component (A) is a crosslinkable silyl group-containing polyoxyalkylene polymer, a crosslinkable silyl group-containing acrylic modified polyoxyalkylene polymer, and / or a crosslinkable silyl group-containing methacryl-modified polyoxyalkylene polymer. The curable composition according to claim 1, wherein   The curable composition according to claim 1, wherein the component (A) is (A1) a crosslinkable silyl group-containing acrylic polymer.   The curable composition according to any one of claims 1 to 3, wherein the component (B) is a (meth) acrylic acid ester-fluoroolefin copolymer. (E) Epoxy resin is further added, The curable composition of any one of Claims 1-4 characterized by the above-mentioned.