JP6839542B2 - Curable composition - Google Patents

Description

The present invention relates to an organic polymer having a reactive silicon group and a curable composition containing the polymer.

An organic polymer having a reactive silicon group may have a property of being crosslinked by forming a siloxane bond accompanied by a hydrolysis reaction of the reactive silicon group due to moisture or the like even at room temperature to obtain a rubber-like cured product. Are known.

Among the organic polymers having a reactive silicon group, the polyoxyalkylene polymer having a reactive silicon group and the (meth) acrylic acid ester-based (co) polymer having a reactive silicon group have already been industrially used. It is produced and widely used in applications such as sealants, adhesives and paints.

N-alkyl-2- as a plasticizer in a curable composition containing an organic polymer having a reactive silicon group, for the purpose of improving workability and curability, and for the purpose of improving the mechanical properties of the cured product. The use of aza-1-cycloalkanone has been studied (Patent Document 1).

A bipolar aproton solvent such as N-methyl-2-pyrrolidone is added to the curable composition containing an organic polymer having a reactive silicon group for the purpose of improving curability in a low humidity atmosphere. It is being studied (Patent Document 2).

N-Methyl-2-pyrrolidone, N, for the purpose of improving the coatability of a curable sealer and / or an adhesive composition containing a polyoxyalkylene polymer having a reactive silicon group to a coating film containing an acrylic resin. , N-Dimethylacetamide, N, N-dimethylformamide and other polar organic solvent materials have been studied (Patent Document 3).

A plasticizer is generally used in a curable composition containing an organic polymer having a reactive silicon group for the purpose of improving workability and adjusting the mechanical properties of the cured product. A low-viscosity and inexpensive phthalate ester-based plasticizer is used (Patent Document 4).

Japanese Unexamined Patent Publication No. 2014-208787 Japanese Unexamined Patent Publication No. 2005-350514 Japanese Patent Publication No. 09-511268 Japanese Unexamined Patent Publication No. 5-2022282

A one-component curable composition obtained by blending an organic polymer having a reactive silicon group with a phthalate ester-based plasticizer has insufficient curability in a deep part because curing proceeds from the surface of the composition due to moisture in the air. was there. Therefore, it has been desired to improve the deep curability in applications where strength and adhesiveness are required at an early stage. Further, when this one-component curable composition is used after storage, curing may be delayed. Therefore, there was room for improvement in curability.

An object of the present invention is to provide a curable composition applicable to a sealant or an adhesive by improving deep curability and curing delay after storage.

As a result of diligent studies to solve the above problems, the present inventors have added (B) an amide-based solvent to (A) a curable composition containing an organic polymer having a reactive silicon group. We have found that the problem can be solved and have completed the present invention.

That is, the present invention
(1). A curable composition comprising (A) an organic polymer having a reactive silicon group and (B) an amide-based solvent which is β-alkoxypropionamide.

(2). The main chain of the component (A) has (A1) a polyoxyalkylene-based polymer having a reactive silicon group, (A2) a saturated hydrocarbon-based polymer having a reactive silicon group, and (A3) a reactive silicon group. The curable composition according to (1), wherein the curable composition is at least one selected from the group consisting of (meth) acrylic acid ester-based (co) polymers.

(3). The description according to any one of (1) to (2), wherein the component (A) is an organic polymer having a (A4) reactive silicon group and containing a urethane bond and / or a urea bond. Curable composition.

(4). The curable composition according to any one of (1) to (3), wherein the reactive silicon group of the component (A) is represented by the following general formula (1).
−SiR ¹ _3-a X _a (1)
(Here, in the general formula (1), R ¹ is independently an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, or -OSi. (R') ₃ (In the formula, R'independently represents a hydrocarbon group having 1 to 20 carbon atoms) represents a triorganosyloxy group. X independently represents a hydroxyl group or a hydrolyzable group. Shown. A is an integer from 1 to 3.)
(5). The curable composition according to any one of (1) to (4), wherein the component (B) β-alkoxypropionamide is a compound represented by the following general formula (9).
R ¹⁰ O-CH ₂ CHR ^13- CONR ¹¹ R ¹² (9)
(Here, in the general formula (9), R ¹⁰ represents a linear, branched or cyclic saturated hydrocarbon group having 1 to 18 carbon atoms. R ¹¹ and R ¹² independently form a hydrogen atom or an ether bond, respectively. It represents a monovalent linear or branched saturated hydrocarbon group which may have, they may be the same or different, and they may be bonded to each other to form a ring structure. It may have a heterocyclic structure in which nitrogen is a hetero atom, or a heterocyclic structure in which a nitrogen atom and an oxygen atom are hetero atoms. R ¹³ indicates a hydrogen atom or a methyl group.)
(6). The curable composition according to any one of (1) to (5), further comprising (C) a phthalate ester-based plasticizer.
(7). A sealing material composition containing the curable composition according to any one of (1) to (6).
(8). An adhesive composition containing the curable composition according to any one of (1) to (6).
(9). A cured product of the curable composition according to any one of (1) to (6).
Regarding.

The curable composition of the present invention is excellent in deep curability and can improve the curing delay after storage.

Hereinafter, the present invention will be described in detail.

The main chain skeleton of the organic polymer having the reactive silicon group (A) of the present invention is not particularly limited.

Examples of the polymer constituting the main chain skeleton of the organic polymer of the component (A) include polyoxyalkylene-based polymers, hydrocarbon-based polymers, polyester-based polymers, vinyl-based (copolymers), and (meth. ) Acrylic acid ester-based (co) polymer, graft polymer, polysulfide-based polymer, polyamide-based polymer, polycarbonate-based polymer, polymer having urethane bond and / or urea bond (urethane prepolymer), diallyl phthalate-based Polymers and the like can be mentioned.

Examples of the polyoxyalkylene polymer include polyoxyethylene, polyoxypropylene, polyoxybutylene, polyoxytetramethylene, polyoxyethylene-polyoxypropylene copolymer, and polyoxypropylene-polyoxybutylene copolymer. Can be given.

Examples of the hydrocarbon-based polymer include ethylene-propylene-based copolymers, polyisobutylene, copolymers of isobutylene and isoprene, polychloroprene, polyisoprene, isoprene or butadiene and acrylonitrile and / or styrene and the like. Examples thereof include coalescing, polybutadiene, isoprene, or copolymers of butadiene with acrylonitrile and styrene, and hydrogenated polyolefin-based polymers obtained by hydrogenating these polyolefin-based polymers.

Examples of the polyester-based polymer include polymers having an ester bond such as a polymer obtained by a condensation reaction between a dibasic acid such as adipic acid and glycol, or a polymer obtained by ring-opening polymerization of lactones. be able to.

Examples of the vinyl-based (co) polymer include polymers obtained by radical polymerization of vinyl-based monomers such as (meth) acrylic acid ester, vinyl acetate, acrylonitrile, and styrene.

Examples of the (meth) acrylic acid ester-based (co) polymer include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and (meth). Examples thereof include a polymer obtained by radical polymerization of a (meth) acrylic acid ester monomer such as stearyl acrylate.

Examples of the graft polymer include polymers obtained by polymerizing vinyl-based monomers among the above-mentioned various polymers.

Examples of the polyamide-based polymer include nylon 6 obtained by ring-opening polymerization of ε-caprolactam, nylon 6.6 obtained by decomposition of hexamethylenediamine and adipic acid, and decomposition of hexamethylenediamine and sebacic acid. Nylon 6/10 obtained, nylon 11 obtained by contraction polymerization of ε-aminoundecanoic acid, nylon 12 obtained by ring-open polymerization of ε-aminolaurolactum, and copolymer having two or more components among the above nylons. Nylon etc. can be given.

Examples of the polycarbonate-based polymer include a polymer produced by polycondensation of bisphenol A and carbonyl chloride.

Examples of the polymer having a urethane bond and / or a urea bond (urethane prepolymer) include a liquid polymer compound having an isocyanate group at the molecular terminal obtained by reacting a polyol with an excessive amount of a polyisocyanate compound. be able to.

In the present invention, "(meth) acrylate" means "acrylate and / or methacrylate", "(meth) acrylic acid" means "acrylic acid and / or methacrylic acid", and "(co) polymer". "" Represents "polymer and / or copolymer". Other similar notations have similar meanings.

Among the polymers constituting the main chain skeleton of the organic polymer of the component (A), saturated hydrocarbon-based polymers such as polyisobutylene, hydrogenated polyisoprene, and hydrogenated polybutadiene, polyoxyalkylene-based polymers, and ( The meta) acrylic acid ester polymer is preferable because it has a relatively low glass transition temperature and the obtained cured product has excellent cold resistance.

The glass transition temperature of the polymer constituting the main chain skeleton of the organic polymer of the component (A) is not particularly limited, but is preferably 20 ° C. or lower, more preferably 0 ° C. or lower, and −20 ° C. It is particularly preferable that the temperature is below ° C. If the glass transition temperature exceeds 20 ° C., the viscosity of the curable composition in winter or cold regions becomes high, which may impair workability, and the flexibility of the cured product decreases, resulting in a decrease in elongation. In some cases. The glass transition temperature shows a value measured by DSC.

Further, among the polymers constituting the main chain skeleton of the organic polymer of the component (A), the polyoxyalkylene polymer and the (meth) acrylic acid ester-based (co) polymer have high moisture permeability, and these are used. The one-component curable composition containing the composition is preferable because it has excellent deep curability and adhesiveness, a polyoxyalkylene polymer is more preferable, and a polyoxypropylene polymer is most preferable.

The reactive silicon group contained in the component (A) of the present invention has a hydroxyl group or a hydrolyzable group bonded to a silicon atom, and is crosslinked by forming a siloxane bond by a reaction accelerated by a silanol condensation catalyst. It is the basis to obtain. Here, the hydrolyzable group means a group that reacts with water to generate a hydroxyl group.

The reactive silicon group is represented as a group of the following general formula (1).

−SiR ¹ _3-a X _a (1)
Here, in the general formula (1), R ¹ is independently an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, or -OSiR'. _{Indicates a triorganosyloxy group represented by 3} (where R'is an independently hydrocarbon group having 1 to 20 carbon atoms). X independently represents a hydroxyl group or a hydrolyzable group. a represents an integer of 1 to 3.

The hydrolyzable group is not particularly limited and may be any conventionally known hydrolyzable group, for example, a halogen atom, an alkoxy group, an acyloxy group, an amino group, an amide group, an aminooxy group, a mercapto group and an alkenyloxy group. And so on. Among these, a hydrogen atom, an alkoxy group, an acyloxy group, a ketoximate group, an amino group, an amide group, an aminooxy group, a mercapto group, and an alkenyloxy group are preferable, and an alkoxy group is preferable from the viewpoint of mild hydrolyzability and easy handling. Is particularly preferable.

Hydrolyzable groups and hydroxyl groups can be bonded to one silicon atom in the range of 1 to 3. When two or more hydrolyzable groups or hydroxyl groups are bonded to the reactive silicon group, they may be the same or different.

The a in the general formula (1) is preferably 2 or 3 from the viewpoint of curability, and particularly preferably 3 when the rapid curability of the curable composition is required. When the storage stability of is determined, it is preferably 2.

^{Examples of R 1} in the above general formula (1) include an alkyl group such as a methyl group and an ethyl group, a cycloalkyl group such as a cyclohexyl group, an aryl group such as a phenyl group, an aralkyl group such as a benzyl group, and R'is methyl. group, triorganosiloxy groups represented by -OSiR _'3 groups is a phenyl group. Of these, the methyl group is particularly preferred.

Examples of the reactive silicon group include a trimethoxysilyl group, a triethoxysilyl group, a triisopropoxysilyl group, a dimethoxymethylsilyl group, a diethoxymethylsilyl group, a diisopropoxymethylsilyl group, and a (chloromethyl) dimethoxysilyl group. , (Methoxymethyl) dimethoxysilyl group and the like.

Among these, a trimethoxysilyl group, a triethoxysilyl group, a dimethoxymethylsilyl group, and a (methoxymethyl) dimethoxysilyl group are preferable from the viewpoint of high activity and good curability, and the trimethoxysilyl group, A (methoxymethyl) dimethoxysilyl group and a dimethoxymethylsilyl group are more preferable, and a trimethoxysilyl group is further preferable. Further, from the viewpoint of storage stability, a dimethoxymethylsilyl group and a triethoxysilyl group are preferable. Further, since the alcohol produced by the hydrolysis reaction of the reactive silicon group is ethanol, the triethoxysilyl group and the diethoxymethylsilyl group are preferable from the viewpoint of having higher safety.

The reactive silicon group may be introduced by a known method. For example, the following method can be mentioned.

Method I: An organic polymer having a functional group such as a hydroxyl group is reacted with a compound having an active group and an unsaturated group exhibiting reactivity with this functional group to obtain an organic polymer having an unsaturated group. Then, the obtained organic polymer having an unsaturated group is reacted with a hydrosilane compound having a reactive silicon group by hydrosilylation.

Examples of the reactive compound having an active group and an unsaturated group used in Method I include unsaturated group-containing epoxy compounds such as allyl chloride, methallyl chloride, and allyl glycidyl ether.

Examples of the hydrosilane compound used in Method I include, but are not limited to, halogenated silanes, alkoxysilanes, asyloxysilanes, and ketoximatesilanes.

Examples of halogenated silanes include trichlorosilane, methyldichlorosilane, dimethylchlorosilane, and phenyldichlorosilane.

Examples of alkoxysilanes include trimethoxysilane, triethoxysilane, diethoxymethylsilane, dimethoxymethylsilane, phenyldimethoxysilane, and 1- [2- (trimethoxysilyl) ethyl] -1,1,3,3-. Examples thereof include tetramethyldisiloxane.

Examples of the acyloxysilanes include methyldiacetoxysilane and phenyldiacetoxysilane.

Examples of ketoximate silanes include bis (dimethyl ketoximate) methylsilane and bis (cyclohexylketoximate) methylsilane.

Among these, halogenated silanes and alkoxysilanes are particularly preferable, and alkoxysilanes are most preferable because the obtained curable composition has mild hydrolyzability and is easy to handle.

Among the alkoxysilanes, dimethoxymethylsilane is particularly preferable because it is easily available and the curable composition containing the obtained organic polymer has high curability, storage stability, elongation characteristics, and tensile strength. Further, trimethoxysilane is particularly preferable from the viewpoint of curability and restorability of the obtained curable composition.

Method II: An organic polymer having an unsaturated group obtained by subjecting a compound having a mercapto group and a reactive silicon group to a radical addition reaction in the presence of a radical initiator and / or a radical source in the same manner as in Method I. The method of introducing into the unsaturated radical site of the above can be mentioned.

Examples of the compound having a mercapto group and a reactive silicon group used in Method II include γ-mercaptopropyltrimethoxysilane, γ-mercaptopropylmethyldimethoxysilane, γ-mercaptopropyltriethoxysilane, and γ-mercaptopropylmethyldiethoxy. Examples thereof include, but are not limited to, silane, mercaptomethyltrimethoxysilane, and mercaptomethyltriethoxysilane.

Method III: An organic polymer having a functional group such as a hydroxyl group, an epoxy group or an isocyanate group in the molecule is reacted with a compound having a functional group exhibiting reactivity with this functional group and a reactive silicon group.

Among the methods III, examples of the method for reacting an organic polymer having a hydroxyl group with a compound having an isocyanate group and a reactive silicon group include, for example, the method shown in JP-A-3-47825, but the method is limited to this. It is not something that is done.

Examples of the compound having an isocyanate group and a reactive silicon group used in Method III include γ-isocyanatepropyltrimethoxysilane, γ-isocyanatepropylmethyldimethoxysilane, γ-isocyanatepropyltriethoxysilane, and γ-isocyanatepropylmethyldiethoxy. Examples thereof include, but are not limited to, silane, isocyanate methyltrimethoxysilane, isocyanatemethyltriethoxysilane, isocyanatemethyldimethoxymethylsilane, and isocyanatemethyldiethoxymethylsilane.

A silane compound in which three hydrolyzable groups are bonded to one silicon atom such as trimethoxysilane may undergo a disproportionation reaction. As the disproportionation reaction proceeds, unstable compounds such as dimethoxysilane are produced, which may be difficult to handle. However, such disproportionation reaction does not proceed with γ-mercaptopropyltrimethoxysilane or γ-isocyanatepropyltrimethoxysilane. Therefore, when a group in which three hydrolyzable groups such as a trimethoxysilyl group are bonded to one silicon atom is used as the silicon-containing group, the method of Method II or Method III is preferably used.

On the other hand, the disproportionation reaction does not proceed with the silane compound represented by the following general formula (2).

H- (SiR ² ₂ O) _m SiR ² _2- R ^3- SiX ₃ (2)
Here, in the general formula (2), X is the same as the general formula (1). 2m + 2 pieces of ^{R 2} each independently represent a hydrocarbon group. R ³ represents a divalent organic group. m represents an integer from 0 to 19.

Therefore, when introducing a group in which three hydrolyzable groups are bonded to one silicon atom in Method I, it is preferable to use a silane compound represented by the general formula (2). From the viewpoint of availability and cost, each of 2m + 2 R ² is preferably a hydrocarbon group having 1 to 20 carbon atoms, more preferably a hydrocarbon group having 1 to 8 carbon atoms, and has 1 to 1 carbon atoms. The hydrocarbon group of 4 is more preferred. R ³ is preferably a divalent hydrocarbon group having 1 to 12 carbon atoms, more preferably a divalent hydrocarbon group having 2 to 8 carbon atoms, and even more preferably a divalent hydrocarbon group having 2 carbon atoms. .. The m is most preferably 1.

Examples of the silane compound represented by the general formula (2) include 1- [2- (trimethoxysilyl) ethyl] -1,1,3,3-tetramethyldisiloxane and 1- [2- (trimethoxysilyl) ethyl. ) Propyl] -1,1,3,3-tetramethyldisiloxane, 1- [2- (trimethoxysilyl) hexyl] -1,1,3,3-tetramethyldisiloxane and the like.

In the above method I or method III, the method of reacting an organic polymer having a hydroxyl group at the terminal with a compound having an isocyanate group and a reactive silicon group is because a high conversion rate can be obtained in a relatively short reaction time. preferable. Further, the organic polymer having a reactive silicon group obtained by Method I has a lower viscosity than the organic polymer having a reactive silicon group obtained by Method III, and if this is used, the curability with good workability is good. Method I is particularly preferable because the composition can be obtained and the organic polymer having a reactive silicon group obtained by Method II has a strong odor based on mercaptosilane.

The organic polymer having a reactive silicon group may be linear or branched. The number average molecular weight (Mn) of the organic polymer having a reactive silicon group is a value measured by GPC (in terms of polystyrene), preferably 1,000 to 100,000, more preferably 2,000 to 50,000. It is preferable, and 3,000 to 30,000 is particularly preferable. If the number average molecular weight is less than 1,000, the elongation of the cured product tends to be insufficient, and if it exceeds 100,000, the curable composition becomes highly viscous, which tends to be inconvenient in terms of workability. The molecular weight distribution (Mw / Mn) of the organic polymer having a reactive silicon group measured by GPC is preferably 2 or less, more preferably 1.5 or less, still more preferably 1.4 or less.

In order to obtain a rubber-like cured product having high strength, high elongation and low elastic modulus, the number of reactive silicon groups contained in the organic polymer is preferably one or more on average in one molecule. 1.1 to 5 are more preferable, 1.1 to 3 are even more preferable, and 1.1 to 2 are most preferable. If the number of reactive silicon groups contained in the molecule is less than one on average, the curability becomes insufficient, and it becomes difficult to obtain a cured product having good rubber elastic behavior. The reactive silicon group may be at the end of the main chain or the end of the side chain of the organic polymer, or may be at both ends. In particular, when the reactive silicon group is present only at the end of the main chain, the effective network length in the finally formed cured product becomes long, so that the rubber-like cured product having high strength, high elongation and low elastic modulus is exhibited. Is easy to obtain.

<(A1) Polyoxyalkylene polymer having a reactive silicon group>
Among the components (A) of the present invention, the main chain structure of the polyoxyalkylene polymer having the reactive silicon group (A1) is preferably a repeating unit represented by the following general formula (3).

-R ^4- O- (3)
Here, in the general formula (3), R ⁴ represents a linear or branched alkylene group having 1 to 14 carbon atoms, and 2 to 4 carbon atoms are more preferable.

Examples of the repeating unit represented by the general formula (3) include -CH ₂ O- _{, -CH 2} CH ₂ O-, -CH ₂ CH (CH ₃ ) O-, and -CH ₂ CH (C ₂ H ₅ ). O-, -CH ₂ C (CH ₃ ) ₂ O-, -CH ₂ CH ₂ CH ₂ CH ₂ O- and the like can be mentioned.

The main chain of the polyoxyalkylene polymer may consist of only one type of repeating unit or may consist of two or more types of repeating units. In particular, when the curable composition of the present invention is used as a sealant or the like, the main chain structure of the organic polymer of the component (A) is an amorphous polyoxypropylene-based polymer having a relatively low viscosity. It is preferable to have.

Examples of the method for synthesizing the polyoxyalkylene polymer include a polymerization method using an alkali catalyst such as KOH, and a transition metal such as a complex obtained by reacting an organic aluminum compound shown in JP-A-61-215623 with porphyrin. Polymerization method using compound-porphyrin complex catalyst, composite metal cyanide complex catalysts shown in Tokusho 46-27250, Tokusho 59-15336, US3278457, US3278458, US3278459, US3427256, US3427334, US3427335 and the like. (For example, a polymerization method using a zinc hexacyanocobaltate glyme complex catalyst), a polymerization method using a catalyst composed of a polyphosphazene salt shown in JP-A-10-273512, and a catalyst composed of a phosphazene compound shown in JP-A-11-060722. The polymerization method to be used is not limited to these.

Among these, a polymerization method in which an alkylene oxide is reacted with an initiator in the presence of a composite metal cyanide complex catalyst is preferable because a polymer having a narrow molecular weight distribution can be obtained.

Examples of the composite metal cyanide complex catalyst include Zn ₃ [Co (CN) ₆ ] ₂ (zinc hexacyanocobaltate complex). Further, a catalyst in which alcohol and / or ether is coordinated as an organic ligand can also be used.

As the initiator, a compound having at least two active hydrogen groups is preferable. Examples of the active hydrogen-containing compound include polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol and glycerin, linear and / or branched polyether compounds having a number average molecular weight of 500 to 20,000.

Examples of the alkylene oxide include ethylene oxide, propylene oxide, and isobutylene oxide.

Examples of the polyoxyalkylene polymer having a reactive silicon group include Japanese Patent Application Laid-Open No. 45-363319, Japanese Patent Application Laid-Open No. 46-12154, Japanese Patent Application Laid-Open No. 50-156599, Japanese Patent Application Laid-Open No. 54-6096, and Japanese Patent Application Laid-Open No. Polymers proposed in publications such as 55-13767, Japanese Patent Application Laid-Open No. 55-13468, Japanese Patent Application Laid-Open No. 57-164123, Japanese Patent Publication No. 3-2450, US3632557, US4345053, US4363307, US4960844, etc. Further, JP-A-61-197631, JP-A-61-215622, JP-A-61-215623, JP-A-61-218632, JP-A-3-72527, JP-A-3-47825, JP-A-8. It has a reactive silicon group with a number average molecular weight of 6,000 or more, a molecular weight distribution (Mw / Mn) of 1.6 or less or 1.3 or less, and a narrow molecular weight distribution proposed in each publication of No. 231707. Examples thereof include polyoxyalkylene polymers. Such a polyoxyalkylene polymer having a reactive silicon group may be used alone or in combination of two or more.

<(A2) Saturated hydrocarbon polymer having a reactive silicon group>
Among the components (A) of the present invention, the main chain structure of the saturated hydrocarbon polymer having the reactive silicon group (A2) is a polymer that does not contain an aliphatic unsaturated bond. The saturated hydrocarbon polymer may have an aromatic ring (that is, it may have an aromatic double bond).

The saturated hydrocarbon polymer can be polymerized using (1) an olefin compound having 2 to 6 carbon atoms such as ethylene, propylene, 1-butene, and isoprene as the main monomer, or (2) butadiene, isoprene, and the like. It can be obtained by a method such as homopolymerizing a diene compound or copolymerizing with the olefin compound and then hydrogenating the diene compound.

Isobutylene-based polymers and hydrogenated polybutadiene-based polymers are preferable because they can easily introduce functional groups at the terminals, easily control the molecular weight, and can increase the average number of terminal functional groups in one molecule. System polymers are particularly preferred.

A saturated hydrocarbon-based polymer having a reactive silicon group whose main chain structure is composed of a saturated hydrocarbon-based polymer has characteristics of excellent heat resistance, weather resistance, durability, and moisture blocking property.

The isobutylene-based polymer may be formed from all the monomer units of isobutylene units, or may be a copolymer with other monomers. From the viewpoint of rubber properties, those containing 50% by weight or more of the repeating unit derived from isobutylene are preferable, those containing 80% by weight or more are more preferable, and those containing 90 to 99% by weight are particularly preferable.

Various polymerization methods have been conventionally reported as methods for synthesizing saturated hydrocarbon-based polymers, but in particular, many so-called living polymerization methods have been developed in recent years. Saturated hydrocarbon-based polymers, especially isobutylene-based polymers, have been found by Kennedy et al. (JP Kennedy et al., J. Polymer Sci., Polymer Chem. Ed. 1997, Vol. 15, p. 2843). ) Can be easily produced, a number average molecular weight of about 1,000 to 100,000 can be polymerized with a molecular weight distribution of 1.5 or less, and various functional groups can be introduced at the molecular ends. ..

(A2) Examples of the method for producing a saturated hydrocarbon polymer having a reactive silicon group include JP-A-4-69659, JP-A-7-108928, JP-A-63-254149, and JP-A-64-22904. No., Japanese Patent Application Laid-Open No. 1-197509, Japanese Patent No. 2539445, Japanese Patent No. 2873395, Japanese Patent Application Laid-Open No. 7-53882, etc., but are not limited thereto. The saturated hydrocarbon-based polymer having the above-mentioned reactive silicon group may be used alone or in combination of two or more.

<(A3) (meth) acrylic acid ester-based (co) polymer having a reactive silicon group>
Among the components (A) of the present invention, the (meth) acrylic acid ester-based (co) polymer having a (A3) reactive silicon group (co) polymerizes various (meth) acrylic acid ester-based monomers. Can be obtained by doing.

Examples of the (meth) acrylic acid ester-based monomer include (meth) acrylic acid, methyl (meth) acrylic acid, ethyl (meth) acrylic acid, n-propyl (meth) acrylic acid, and isopropyl (meth) acrylic acid. , (Meta) n-butyl acrylate, (meth) isobutyl acrylate, tert-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate , (Meta) n-heptyl acrylate, (meth) n-octyl acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate (meth) ) Phenyl acrylate, toluyl (meth) acrylate, benzyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, 3-methoxybutyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, ( 2-Hydroxypropyl acrylate, stearyl (meth) acrylate, glycidyl (meth) acrylate, 2-aminoethyl (meth) acrylate, γ-((meth) acryloyloxy) propyltrimethoxysilane, γ-( (Meta) Acryloyloxy) propyldimethoxymethylsilane, (Meta) Acryloyloxymethyltrimethoxysilane, (Meta) Acryloyloxymethyltriethoxysilane, (Meta) Acryloyloxymethyldimethoxymethylsilane, (Meta) Acryloyloxymethyldiethoxymethylsilane Examples thereof include (meth) acrylic acid-based monomers such as silane and ethylene oxide adducts of (meth) acrylic acid, but the present invention is not limited thereto.

The (meth) acrylic acid ester-based (co) polymer can also copolymerize the following vinyl-based monomers together with the (meth) acrylic acid ester-based monomer.

Examples of the vinyl-based monomer include styrene-based monomers such as styrene, vinyltoluene, α-methylstyrene, chlorostyrene, styrenesulfonic acid and salts thereof; and silicon-containing vinyltrimethoxysilane and vinyltriethoxysilane. Vinyl-based monomers; maleic anhydride, maleic acid, monoalkyl and dialkyl esters of maleic acid; monoalkyl and dialkyl esters of fumaric acid, fumaric acid; maleimide, methylmaleimide, ethylmaleimide, propylmaleimide, butylmaleimide, Maleimide-based monomers such as hexylmaleimide, octylmaleimide, dodecylmaleimide, stearylmaleimide, phenylmaleimide, cyclohexylmaleimide; nitrile group-containing vinyl monomers such as acrylonitrile and methacrylonitrile; amide groups such as acrylamide and methacrylicamide Vinyl-based monomers; vinyl esters such as vinyl acetate, vinyl propionate, vinyl pivalate, vinyl benzoate, vinyl cinnate; alkens such as ethylene and propylene; conjugated dienes such as butadiene and isoprene; vinyl chloride, Examples thereof include vinylidene chloride, allyl chloride, and allyl alcohol. These may be polymerized alone, or a plurality of them may be copolymerized.

Examples of the (meth) acrylic acid ester-based (co) polymer include a (co) polymer composed of a (meth) acrylic acid ester-based monomer from the viewpoint of physical properties, and a styrene-based monomer valley and (meth) acrylic. A copolymer composed of an acid-based monomer is preferable, a (co) polymer composed of a (meth) acrylic acid ester-based monomer is more preferable, and a (co) polymer composed of an acrylic acid ester-based monomer is further preferable. preferable.

The method for producing the (meth) acrylic acid ester-based (co) polymer is not particularly limited, and a known method can be used. However, a polymer obtained by a normal free radical polymerization method using an azo compound, a peroxide or the like as a polymerization initiator generally has a problem that the value of the molecular weight distribution is larger than 2 and the viscosity becomes high. .. Therefore, it is a (meth) acrylic acid ester-based (co) polymer having a narrow molecular weight distribution and low viscosity, and has a high proportion of crosslinkable functional groups at the ends of the molecular chain (meth) acrylic acid ester-based (co) weight. In order to obtain coalescence, it is preferable to use the living radical polymerization method.

Among the "living radical polymerization methods", the "atomic transfer radical polymerization method" in which an organic halide or a sulfonyl halide compound is used as an initiator and a transition metal complex is used as a catalyst to polymerize a (meth) acrylic acid ester-based monomer is used. In addition to the above-mentioned features of the "living radical polymerization method", it has a halogen or the like at the end, which is relatively advantageous for the functional group conversion reaction, and has a large degree of freedom in designing the initiator and catalyst. It is more preferable as a method for producing a (meth) acrylic acid ester-based polymer having. This atom transfer radical polymerization method is described, for example, in Mattyjaszewski et al., Journal of the American Chemical Society (J. Am. Chem. Soc), 1995, Vol. 117, p. 5614.

(A3) Examples of the method for producing a (meth) acrylic acid ester-based (co) polymer having a reactive silicon group include Tokuho 3-14608, Tokuho 4-55444, and JP-A-6-21922. , A production method using a free radical polymerization method using a chain transfer agent is disclosed. Further, Japanese Patent Application Laid-Open No. 9-272714 and the like disclose a production method using an atom transfer radical polymerization method, but the present invention is not limited thereto. The (meth) acrylic acid ester-based (co) polymer having the above-mentioned reactive silicon group may be used alone or in combination of two or more.

The organic polymer having a reactive silicon group, which is the component (A), may be used alone or in combination of two or more. Specifically, a group consisting of a polyoxyalkylene polymer having a reactive silicon group, a saturated hydrocarbon polymer having a reactive silicon group, and a (meth) acrylic acid ester polymer having a reactive silicon group. A mixture of two or more organic polymers selected from the above can also be used.

A mixture of an organic polymer composed of (A1) a polyoxyalkylene polymer having a reactive silicon group and (A3) a (meth) acrylic acid ester-based (co) polymer having a reactive silicon group is, for example, specially defined. It has been proposed in Kaisho 59-122541, JP-A-63-112642, JP-A-6-172631, JP-A-11-116763, etc., but is not limited thereto.

As a method for producing a mixture of (A1) a polyoxyalkylene polymer having a reactive silicon group and (A3) an organic polymer composed of a (meth) acrylic acid ester-based (co) polymer having a reactive silicon group, For example, a (meth) acrylic acid ester-based monomer having a reactive silicon group and having a molecular chain represented by the following general formula (4) and a (meth) acrylic acid ester represented by the following general formula (5). A method of blending a copolymer composed of a system monomer with a polyoxyalkylene polymer having a reactive silicon group is preferable.

CH ₂ = C (R ⁵ ) (COOR ⁶ ) (4)
Here, in the general formula (4), R ⁵ represents a hydrogen atom or a methyl group. R ⁶ represents an alkyl group having 1 to 8 carbon atoms.

CH ₂ = C (R ⁵ ) (COOR ⁷ ) (5)
Here, in the general formula (5), R ⁵ is the same as the general formula (4). R ⁷ represents an alkyl group having 9 or more carbon atoms.

The ^{R 6} in the general formula (4), for example, a methyl group, an ethyl group, a propyl group, n- butyl group, tert- butyl group, an alkyl group having 1 to 8 carbon atoms, such as 2-ethylhexyl group are preferred, Alkyl groups having 1 to 4 carbon atoms are more preferable, and alkyl groups having 1 or 2 carbon atoms are even more preferable. The monomer of the general formula (4) may be used alone or in combination of two or more.

^{As R 7} of the general formula (5), for example, an alkyl group having 9 or more carbon atoms such as a nonyl group, a decyl group, a lauryl group, a tridecyl group, a cetyl group, a stearyl group and a behenyl group is preferable, and the number of carbon atoms is 10. Alkyl groups of ~ 30 are more preferable, and alkyl groups having 10 to 20 carbon atoms are even more preferable. The monomer of the general formula (5) may be used alone or in combination of two or more.

The molecular chain of the (meth) acrylic acid ester-based (co) polymer having a reactive silicon group is preferably composed of the monomers of the general formula (4) and the general formula (5), and the general formula (4) and the general formula (4) and It is more preferable that the total of the monomers of the general formula (5) is 50% by weight or more, and further that the total of the monomers of the general formula (4) and the general formula (5) is 70% by weight or more. preferable.

The abundance ratio of the monomers of the general formula (4) and the general formula (5) is preferably 95: 5 to 40:60 by weight, and more preferably 90: 10 to 60:40.

Examples of the monomer other than the general formula (4) and the general formula (5) include (meth) acrylic acid; a monomer containing an amide group such as (meth) acrylamide and N-methylol (meth) acrylamide; glycidyl. Monomer containing epoxy group such as (meth) acrylate; Monomer containing amino group such as diethylaminoethyl (meth) acrylate and aminoethyl vinyl ether; Others Acrylonitrile, styrene, α-methylstyrene, alkylvinyl ether, vinyl chloride, Monomers derived from vinyl acetate, vinyl propionate, ethylene and the like can be mentioned.

The reactive silicon group in the (meth) acrylic acid ester-based (co) polymer having a reactive silicon group is a compound having a reactive silicon group and a mercapto group and / or a reactive silicon group and a polymerizable unsaturated group. The compound can be introduced by copolymerizing with a (meth) acrylic acid ester-based monomer.

Examples of the compound having a reactive silicon group and a mercapto group include γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyldimethoxymethylsilane, γ-mercaptopropyltriethoxysilane, α-mercaptomethyltrimethoxysilane, and α-mercapto. Examples thereof include mercaptosilane compounds such as methyldimethoxymethylsilane and α-mercaptomethyltriethoxysilane.

Examples of the compound having a reactive silicon group and a polymerizable unsaturated group include γ- (meth) acryloxypropyltrimethoxysilane, γ- (meth) acryloxypropyldimethoxymethylsilane, and γ- (meth) acryloxipropyl. Triethoxysilane, α- (meth) acryloximethyltrimethoxysilane, α- (meth) acryloximethyldimethoxymethylsilane, α- (meth) acryloximethyltriethoxysilane, vinyltrimethoxysilane, vinyldimethoxymethylsilane, Vinyl triethoxysilane and the like can be mentioned.

A mixture of an organic polymer composed of (A2) a saturated hydrocarbon-based polymer having a reactive silicon group and (A3) a (meth) acrylic acid ester-based (co) polymer having a reactive silicon group is, for example, special. Although it has been proposed in Kaihei 1-168764, Japanese Patent Application Laid-Open No. 2000-186176, etc., it is not limited thereto.

The mixture of the organic polymer having a reactive silicon group and the (meth) acrylic acid ester-based (co) polymer having a reactive silicon group is an organic polymer having a reactive silicon group. A method of polymerizing a (meth) acrylic acid ester-based monomer in the presence of is available. Such a manufacturing method has been proposed in, for example, JP-A-59-78223, JP-A-59-168014, JP-A-60-228516, JP-A-60-228517, and the like. It is not limited.

<(A4) Organic polymer having a reactive silicon group and containing a urethane bond and / or a urea bond>
As the component (A) of the present invention, an organic polymer having a (A4) reactive silicon group and containing a urethane bond and / or a urea bond can also be used.

Urethane bond ^{(-NR 8 -C (= O)} -O-) and / or a urea bond ^{(-NR 8 -C (= O)} -NR 8 -) amide bond moiety represented by the following general formula (6) It is a binding group containing.

-NR ^8- C (= O)-(6)
Here, in the general formula (6), R ⁸ represents an organic group or a hydrogen atom.

The amide bond site represented by the general formula (6) is, for example, a reaction between an isocyanate group and a hydroxyl group, a reaction between an isocyanate group and an amino group, a reaction between an isocyanate group and an isocyanate group, and a reaction between an isocyanate group and a mercapto group. Those formed by such as can be mentioned. Moreover, those formed by reaction of the amide bond site and an isocyanate group containing an active hydrogen atom in R ⁸ of general formula (6) is also included in the amide bond moiety represented by the general formula (6).

(A4) As an industrially easy method for producing an organic polymer having a reactive silicon group and containing a urethane bond and / or a urea bond, for example, an organic polymer having an active hydrogen-containing group at the terminal is excessive. After reacting the polyisocyanate compound of the above to form a polyurethane polymer having an isocyanate group at the terminal, or at the same time, a silicon compound represented by the following general formula (7) is added to all or part of the isocyanate group at the terminal. Examples thereof include those produced by a method of reacting W groups.

W-R ^9- SiR ¹ _3-a X _a (7)
Here, in the general formula ^(7), R 1, X, a are the same as the general formula (1). R ⁹ represents a divalent organic group, and a hydrocarbon group having 1 to 20 carbon atoms is more preferable. W represents an active hydrogen-containing group selected from a hydroxyl group, a carboxy group, a mercapto group and an amino group (primary or secondary).

Examples of the silicon compound represented by the general formula (7) include an amino group-containing silane compound, a hydroxyl group-containing silane compound, and a mercapto group-containing silane compound.

Examples of the amino group-containing silane compound include γ-aminopropyltrimethoxysilane, N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane, (N-phenyl) -γ-aminopropyltrimethoxysilane, and N. -Ethylaminoisobutyltrimethoxysilane, N-cyclohexylaminomethyltriethoxysilane, N-cyclohexylaminomethyldiethoxymethylsilane, N-phenylaminomethyltrimethoxysilane and the like can be mentioned.

Examples of the hydroxyl group-containing silane compound include γ-hydroxypropyltrimethoxysilane.

Examples of the mercapto group-containing silane compound include γ-mercaptopropyltrimethoxysilane.

Further, it is described in JP-A-6-21179 (US5364955), JP-A-10-53637 (US5756751), JP-A-10-204144 (EP0831108), JP-A-2000-169544, JP-A-2000-169545. As shown above, Michael addition reaction products of various α, β-unsaturated carbonyl compounds and primary amino group-containing silane compounds, or Michael of various (meth) acryloyl group-containing silane compounds and primary amino group-containing compounds. The addition reaction product can also be used as a silicon compound represented by the general formula (7).

Documents related to this production method include, for example, Japanese Patent Application Laid-Open No. 46-12154 (US3632557), Japanese Patent Application Laid-Open No. 58-109529 (US4374237), Japanese Patent Application Laid-Open No. 62-13430 (US46458516), and Japanese Patent Application Laid-Open No. 8 -53528 (EP0676403), JP-A-10-204144 (EP0831108), Japanese Patent Application Laid-Open No. 2003-508561 (US6197912), JP-A-6-21179 (US5364955), JP-A-10-53637 (US5756751), Examples thereof include Kaihei 11-100427, Japanese Patent Application Laid-Open No. 2000-169544, Japanese Patent Application Laid-Open No. 2000-169545, Japanese Patent Application Laid-Open No. 2002-212415, Japanese Patent No. 3313360, US4067844, US371144, and Japanese Patent Application Laid-Open No. 2001-323040. ..

Further, as the organic polymer having (A4) a reactive silicon group and containing a urethane bond and / or a urea bond, for example, an organic polymer having an active hydrogen-containing group at the terminal is represented by the general formula (8). A polymer produced by reacting with a reactive silicon group-containing isocyanate compound can also be mentioned.

O = C = N-R ^9- SiR ¹ _3-a X _a (8)
Here, in the general formula (8), R ⁹ , R ¹ , X, and a are the same as described above.

Examples of the reactive silicon group-containing isocyanate compound represented by the general formula (8) include γ-trimethoxysilylpropyl isocyanate, γ-triethoxysilylpropyl isocyanate, γ-methyldimethoxysilylpropyl isocyanate, and γ-methyldiethoxy. Examples thereof include, but are not limited to, silylpropyl isocyanate, trimethoxysilylmethyl isocyanate, triethoxymethylsilylmethylisocyanate, dimethoxymethylsilylmethylisocyanate, and diethoxymethylsilylmethylisocyanate. Further, as described in JP-A-2000-119365 (US Pat. No. 6,046,270), a compound obtained by reacting a silicon compound of the general formula (7) with an excess of the polyisocyanate compound is also a general formula. It can be used as the reactive silicon group-containing isocyanate compound represented by (8).

Documents related to this production method include, for example, JP-A-11-279249 (US5990257), JP-A-2000-119365 (US6046270), JP-A-58-29818 (US4345053), JP-A-3- 47825 (US5068304), JP-A-11-60724, JP-A-2002-155145, JP-A-2002-249538, WO03 / 018658, WO03 / 059981 and the like can be mentioned.

Examples of the organic polymer having an active hydrogen-containing group at the terminal include a polyoxyalkylene polymer having a hydroxyl group at the terminal (polyether polyol), a polyacrylic polyol, a polyester polyol, and a saturated hydrocarbon-based polymer having a hydroxyl group at the terminal. Examples thereof include coalescing (polyolefin polyol), polythiol compound, and polyamine compound. Among these, polyether polyols, polyacrylic polyols, and polyolefin polyols are preferable because the glass transition temperature of the obtained organic polymer is relatively low and the obtained cured product has excellent cold resistance. In particular, the polyether polyol is particularly preferable because the viscosity of the obtained organic polymer is low, the workability is good, the deep curability of the curable composition and the adhesiveness of the cured product are good. Further, the polyacrylic polyol and the saturated hydrocarbon-based polymer are more preferable because the obtained cured product has good weather resistance and heat resistance.

The method for producing the polyether polyol is not particularly limited, but a method having at least 0.7 hydroxyl groups per molecular end on average for all molecules is preferable. Examples of the polyether polyol include a polyoxyalkylene polymer produced by using a conventional alkali metal catalyst, a polyhydroxy compound having at least two hydroxyl groups in the presence of a composite metal cyanide complex catalyst and a cesium catalyst, and the like. Examples of the initiator of the above include a polyoxyalkylene polymer produced by reacting an alkylene oxide.

Among the above polymerization methods, the polymerization method using a composite metal cyanide complex catalyst has a lower degree of unsaturation, a narrower molecular weight distribution (Mw / Mn), a lower viscosity, a high acid resistance, and a high weather resistance. It is preferable because it is possible to obtain a polyoxyalkylene polymer.

Examples of the polyacrylic polyol include a polyol having a (meth) acrylic acid alkyl ester (co) polymer as a main chain and having a hydroxyl group in the molecule. As a method for synthesizing this polymer, the living radical polymerization method is preferable because the molecular weight distribution is narrow and the viscosity can be lowered, and the atom transfer radical polymerization method is more preferable. Further, it is preferable to use a polymer obtained by continuous bulk polymerization of the acrylic acid alkyl ester-based monomer described in JP-A-2001-207157 at high temperature and high pressure (obtained by a so-called SGO process). Specifically, Alfon UH-2000 manufactured by Toagosei Co., Ltd. can be mentioned.

Examples of the polyisocyanate compound include aromatic polyisocyanates and aliphatic polyisocyanates.

Examples of the aromatic polyisocyanate include toluene (toluene) diisocyanate, diphenylmethane diisocyanate, and xylylene diisocyanate.

Examples of the aliphatic polyisocyanate include isophorone diisocyanate and hexamethylene diisocyanate.

(A4) Organic polymers having a reactive silicon group and containing urethane bonds and / or urea bonds are also generally called silylated urethanes, silylated polyurethanes, SPURs, etc., and have already been industrially produced. There is.

(A4) Organic polymers having a reactive silicon group and containing urethane bonds and / or urea bonds are, for example, Desmosea S series (manufactured by Bayer), SPUR ⁺ series (manufactured by Momentive), GENIOSIL STP-E10, GENIOSIL STP. -E15, GENIOSIL STP-E30, GENIOSIL STP-E35 (all manufactured by Wacker) and the like are available.

In a preferred embodiment of the component (A) of the present invention, at least one silicon-containing group selected from the group consisting of a trimethoxysilyl group, a triethoxysilyl group, a dimethoxymethylsilyl group and a (methoxymethyl) dimethoxysilyl group is used. One molecule has 1.1 to 5 on average, and the number average molecular weight is 1,000 to 100,000. (A1) polyoxyalkylene polymer, (A2) saturated hydrocarbon polymer, At least one organic polymer selected from the group consisting of (A3) (meth) acrylic acid ester-based (co) polymers and (A4) organic polymers containing urethane and / or urea bonds. In the description of this preferred embodiment, the limitation of the silicon-containing group and the number average molecular weight (modifying phrase) is (A1) a polyoxyalkylene polymer, (A2) a saturated hydrocarbon polymer, (A3) ( All of the meta) acrylic acid ester-based polymers and organic polymers containing (A4) urethane and / or urea bonds are modified.

In a more preferred embodiment of the component (A), at least one silicon-containing group selected from the group consisting of a trimethoxysilyl group, a (methoxymethyl) dimethoxysilyl group and a dimethoxymethylsilyl group is averaged in one molecule. It is composed of (A1) polyoxyalkylene polymer and (A3) (meth) acrylic acid ester-based (co) polymer having 1.1 to 1 and having a number average molecular weight of 2,000 to 50,000. At least one organic polymer selected from the group. In the description of this more preferable embodiment, the limitation of the silicon-containing group and the number average molecular weight (modifying phrase) is defined as (A1) polyoxyalkylene polymer and (A3) (meth) acrylic acid ester-based (co). Both polymers are modified.

As a more preferable embodiment of the component (A), a polyoxyalkylene system having an average of 1.1 to 2 dimethoxymethylsilyl groups in one molecule and a number average molecular weight of 3,000 to 30,000. It is a polymer.

The most preferable embodiment of the component (A) is a polyoxypropylene type having an average of 1.1 to 2 dimethoxymethylsilyl groups in one molecule and a number average molecular weight of 3,000 to 30,000. It is a polymer.

<(B) Amide solvent>
The (B) amide-based solvent of the present invention is used as a plasticizer component for the purpose of adjusting the viscosity and improving workability of the curable composition and adjusting the mechanical properties of the cured product obtained by curing the curable composition. Is added. By using the component (B), the deep curability of the one-component curable composition is improved as compared with the case where a phthalate-based plasticizer is used, and it is possible to prevent a delay in curing after storage.

As the component (B), β-alkoxypropionamide is most preferable from the viewpoint of the plasticizing effect on the component (A) and the mechanical properties of the obtained cured product.

The β-alkoxypropionamide of the component (B) is not particularly limited, but β-alkoxypropionamide having a molecular weight of 50 to 500 is preferable, and β-alkoxypropionamide having a molecular weight of 50 to 300 is more preferable. Examples of the component (B) include compounds represented by the following general formula (9).

R ¹⁰ O-CH ₂ CHR ^13- CONR ¹¹ R ¹² (9)
Here, in the general formula (9), R ¹⁰ represents a linear, branched or cyclic saturated hydrocarbon group having 1 to 18 carbon atoms. R ¹¹ and R ¹² represent monovalent linear or branched saturated hydrocarbon groups that may independently have hydrogen atoms or ether bonds, which may be the same or different. Further, they may be bonded to each other to form a ring structure. The ring structure may be a heterocyclic structure in which nitrogen is a heteroatom, or a heterocyclic structure in which a nitrogen atom and an oxygen atom are heteroatoms. R ¹³ represents a hydrogen atom or a methyl group.

Examples of R ¹⁰ include methyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group and 2-ethylhexyl. Groups, n-octyl groups, lauryl groups, etc. can be mentioned.

The ^{monovalent linear or branched saturated hydrocarbon group which may have R 11} and R ¹² ether bonds is preferably a saturated hydrocarbon group having 1 to 20 carbon atoms, more preferably 1 to 6 carbon atoms. .. Examples of R ¹¹ and R ¹² include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, methoxymethyl group, methoxyethyl group, ethoxyethyl group and the like. I can give it.

Examples of the case where R ¹¹ and R ¹² are bonded to form a ring structure include a 1-pyrrolidinyl group, a pipedylino group, a morpholino group and the like.

Examples of the β-alkoxypropionamide represented by the general formula (9) include the compounds shown below.

When R ¹⁰ is a methyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-methoxypropion amide, N, N-diethyl-β-methoxypropion amide, N, N-methylethyl-β-methoxy Propionamide, N, N-di-n-propyl-β-methoxypropionamide, N, N-diisopropyl-β-methoxypropionamide, N, N-methyl-n-propyl-β-methoxypropionamide, N, N Examples thereof include -methylisopropyl-β-methoxypropionamide, N, N-ethylisopropyl-β-methoxy-propionamide, N, N-ethyl-n-propyl-β-methoxypropionamide and the like.

When R ¹⁰ is an ethyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-ethoxypropion amide, N, N-diethyl-β-ethoxypropion amide, N, N-methylethyl-β-ethoxy. Propionamide, N, N-di-n-propyl-β-ethoxypropionamide, N, N-diisopropyl-β-ethoxypropionamide, N, N-methyl-n-propyl-β-ethoxypropionamide, N, N Examples thereof include -methylisopropyl-β-ethoxypropionamide, N, N-ethylisopropyl-β-ethoxypropionamide, N, N-ethyl-n-propyl-β-ethoxypropionamide and the like.

When R ¹⁰ is an n-propyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-n-propoxypropionamide, N, N-diethyl-β-n-propoxypropionamide, N, N- Methylethyl-β-n-propoxypropionamide, N, N-methyl-n-propyl-β-n-propoxypropionamide, N, N-methylisopropyl-β-n-propoxypropionamide, N, N-ethylisopropyl Examples thereof include -β-n-propoxypropionamide, N, N-ethyl-n-propyl-β-n-propoxypropionamide and the like.

When R ¹⁰ is an isopropyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-isopropoxypropionamide, N, N-diethyl-β-isopropoxypropionamide, N, N-methylethyl-β -Isopropoxypropionamide, N, N-methyl-n-propyl-β-isopropoxypropionamide, N, N-methylisopropyl-β-isopropoxypropionamide, N, N-ethylisopropyl-β-isopropoxypropionamide , N, N-ethyl-n-propyl-β-isopropoxypropionamide and the like.

When R ¹⁰ is an n-butyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-n-butoxypropionamide, N, N-diethyl-β-n-butoxypropionamide, N, N- Methylethyl-β-n-butoxypropionamide, N, N-methyl-n-propyl-β-n-butoxypropionamide, N, N-methylisopropyl-β-n-butoxypropionamide and the like can be mentioned.

When R ¹⁰ is a sec-butyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-sec-butoxypropionamide, N, N-diethyl-β-sec-butoxypropionamide, N, N- Methylethyl-β-sec-butoxypropionamide, N, N-methyl-n-propyl-β-sec-butoxypropionamide, N, N-methylisopropyl-β-sec-butoxypropionamide and the like can be mentioned.

When R ¹⁰ is an isobutyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-isobutoxypropionamide, N, N-diethyl-β-isobutoxypropionamide, N, N-methylethyl-β -Isobutoxypropionamide, N, N-methyl-n-propyl-β-isobutoxypropionamide, N, N-methylisopropyl-β-isobutoxypropionamide and the like can be mentioned.

When R ¹⁰ is a pentyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-pentyloxypropionamide, N, N-methylethyl-β-pentyloxypropionamide and the like can be mentioned.

When R ¹⁰ is a hexyl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-hexyloxypropionamide and the like can be mentioned.

When R ¹⁰ is a lauryl group and R ¹³ is a hydrogen atom, N, N-dimethyl-β-lauryl oxypropine amide and the like can be mentioned.

When R ¹⁰ is a methyl group and R ¹³ is a methyl group, N, N-dimethyl-β-methoxy-α-methylpropionamide, N, N-diethyl-β-methoxy-α-methylpropionamide, N, N-Methylethyl-β-methoxy-α-methylpropionamide, N, N-di-n-propyl-β-methoxy-α-methylpropionamide, N, N-diisopropyl-β-methoxy-α-methylpropionamide , N, N-diisopropyl-β-methoxy-α-methylpropionamide, N, N-methyl-n-propyl-β-methoxy-α-methylpropionamide, N, N-methylisopropyl-β-methoxy-α- Methylpropionamide, N, N-ethylisopropyl-β-methoxy-α-methylpropionamide, N, N-ethyl-n-propyl-β-methoxy-α-methylpropionamide and the like can be mentioned.

When R ¹⁰ is an ethyl group and R ¹³ is a methyl group, N, N-dimethyl-β-ethoxy-α-methylpropionamide, N, N-diethyl-β-ethoxy-α-methylpropionamide, N, N-Methylethyl-β-ethoxy-α-methylpropionamide, N, N-methyl-n-propyl-β-ethoxy-α-methylpropionamide, N, N-methylisopropyl-β-ethoxy-α-methylpropion Examples thereof include amide, N, N-ethylisopropyl-β-ethoxy-α-methylpropionamide, N, N-ethyl-n-propyl-β-ethoxy-α-methylpropionamide and the like.

When R ¹⁰ is an n-propyl group and R ¹³ is a methyl group, N, N-dimethyl-β-n-propoxy-α-methylpropionamide, N, N-diethyl-β-n-propoxy-α- Methylpropionamide, N, N-methyl-n-propyl-β-n-propoxy-α-methylpropionamide, N, N-methylisopropyl-β-n-propoxy-α-methylpropionamide, N, N-methyl Ethyl-β-n-propoxy-α-methylpropionamide and the like can be mentioned.

When R ¹⁰ is an isopropyl group and R ¹³ is a methyl group, N, N-diethyl-β-isopropoxy-α-methylpropionamide. Examples thereof include N, N-methyl-n-propyl-β-isopropoxy-α-methylpropionamide, N, N-methylisopropyl-β-isopropoxy-α-methylpropionamide and the like.

When R ¹⁰ is an n-butyl group and R ¹³ is a methyl group, N, N-dimethyl-β-n-butoxy-α-methylpropionamide, N, N-methylethyl-β-n-butoxy-α -Methylpropionamide can be mentioned.

When R ¹⁰ is a sec-butyl group and R ¹³ is a methyl group, N, N-dimethyl-β-sec-butoxy-α-methylpropionamide, N, N-methylethyl-β-sec-butoxy-2 -Methylpropionamide can be mentioned.

When R ¹⁰ is an isobutyl group and R ¹³ is a methyl group, N, N-dimethyl-β-isobutoxy-α-methylpropionamide, N, N-methylethyl-β-isobutoxy-α-methylpropionamide, etc. I can give it.

When R ¹⁰ is a pentyl group and R ¹³ is a methyl group, N, N-dimethyl-β-pentyloxy-α-methylpropionamide and the like can be mentioned.

Of these, in the general formula (9), those in which R ¹⁰ is a methyl group or an n-butyl group, R ¹³ is a hydrogen atom, and R ¹¹ and R ¹² are alkyl groups, respectively, are most preferable from the viewpoint of availability. The amide-based solvent composed of such a compound is Equamid M-100 of Idemitsu Kosan Co., Ltd. (R ^{10 in the} general formula (9) is a methyl group, R ¹³ is a hydrogen atom, and R ¹¹ and R ¹² are alkyl groups, respectively). It is available as Equamid B-100 (R ¹⁰ of the general formula (9) is an n-butyl group, R ¹³ is a hydrogen atom, and R ¹¹ and R ¹² are alkyl groups, respectively).

The component (B) may be used alone or in combination of two or more.

The amount of the component (B) used is preferably 5 to 150 parts by weight, more preferably 10 to 120 parts by weight, further preferably 20 to 110 parts by weight, and 30 to 100 parts by weight with respect to 100 parts by weight of the component (A). The part is the most preferable. If it is less than 5 parts by weight, the effect as a plasticizer will not be exhibited, and if it exceeds 150 parts by weight, the mechanical strength of the cured product will be insufficient.

A (C) phthalate ester-based plasticizer can be further added as a plasticizer component to the curable composition of the present invention. Here, the term "phthalate ester" is used in a broad sense in the present application, and includes an ortho-form phthalate ester (narrow sense), a meta-form isophthalic acid ester, and a para-form terephthalic acid ester.

Examples of the phthalate ester-based plasticizer which is an ortho form include dimethyl phthalate, diethyl phthalate, di-n-butyl phthalate, diisobutyl phthalate, di-n-hexyl phthalate, and bis (2-ethylhexyl phthalate). ), Di-n-octyl phthalate, diisononyl phthalate, dinonyl phthalate, diisodecyl phthalate, diisoundecyl phthalate, bisbutylbenzyl phthalate and the like can be mentioned.

Examples of the isophthalic acid ester-based plasticizer include diethyl isophthalate, di-n-butyl isophthalate, diisobutyl isophthalate, di-n-hexyl isophthalate, di-n-octyl isophthalate, diisooctyl isophthalate, and bis isophthalate. (2-Ethylhexyl) (manufactured by CG Esther Co., Ltd., trade name: available as DOIP), di-n-nonyl isophthalate, diisononyl isophthalate, diisodecyl isophthalate and the like can be mentioned.

Examples of the terephthalic acid ester-based plasticizer include diethyl terephthalate, di-n-butyl terephthalate, diisobutyl terephthalate, di-n-hexyl terephthalate, di-n-octyl terephthalate, diisooctyl terephthalate, and bis terephthalate. (2-Ethylhexyl) (manufactured by EASTMAN, trade name: available as EASTMAN168), di-n-nonyl terephthalate, diisononyl terephthalate, diisodecyl terephthalate and the like can be mentioned.

Of these, bis phthalate (2-ethylhexyl), diisononyl phthalate, diisodecyl phthalate, bis isophthalate (2-ethylhexyl), and bis terephthalate (2-ethylhexyl) are particularly preferable from the viewpoint of availability.

The component (C) may be used alone or in combination of two or more.

The amount of the component (C) used is preferably 5 to 150 parts by weight, more preferably 10 to 120 parts by weight, further preferably 20 to 110 parts by weight, and 30 to 100 parts by weight with respect to 100 parts by weight of the component (A). The part is the most preferable. If it is less than 5 parts by weight, the effect as a plasticizer will not be exhibited, and if it exceeds 150 parts by weight, the mechanical strength of the cured product will be insufficient.

The ratio (% by weight) of the component (B) to the component (C) is preferably (B) component: (C) component = 100: 0 to 10:90, more preferably 90: 10 to 20:80, and 80:20. ~ 30:70 is more preferable, and 70:30 to 40:60 is most preferable.

It is also possible to use a plasticizer other than the component (C) in the curable composition of the present invention.

Examples of plasticizers other than the component (C) include cyclohexanedicarboxylic acid ester, aliphatic polyvalent carboxylic acid ester, unsaturated fatty acid ester, alkylsulfonic acid phenyl ester (manufactured by LANXESS, trade name: Mesamol), and phosphorus. Examples thereof include acid esters, trimellitic acid esters, chlorinated paraffins, hydrocarbon oils, process oils, and epoxy plasticizers.

Examples of the cyclohexanedicarboxylic acid ester include 1,2-cyclohexanedicarboxylic acid diisononyl (manufactured by BASF, trade name: Hexamol DINCH), 1,3-cyclohexanedicarboxylic acid diethyl, and 1,3-cyclohexanedicarboxylic acid di-n. -Butyl, diisobutyl 1,3-cyclohexanedicarboxylic acid, di-n-hexyl 1,3-cyclohexanedicarboxylic acid, di-n-octyl 1,3-cyclohexanedicarboxylic acid, diisooctyl 1,3-cyclohexanedicarboxylic acid, 1,3 Bis-cyclohexanedicarboxylic acid (2-ethylhexyl), di-n-nonyl 1,3-cyclohexanedicarboxylic acid, diisononyl 1,3-cyclohexanedicarboxylic acid, diisodecyl 1,3-cyclohexanedicarboxylic acid, diethyl 1,4-cyclohexanedicarboxylic acid , 1,4-Cyclohexanedicarboxylic acid di-n-butyl, 1,4-cyclohexanedicarboxylic acid diisobutyl, 1,4-cyclohexanedicarboxylic acid di-n-hexyl, 1,4-cyclohexanedicarboxylic acid di-n-octyl, 1, , 4-Cyclohexanedicarboxylic acid diisooctyl, 1,4-cyclohexanedicarboxylic acid bis (2-ethylhexyl), 1,4-cyclohexanedicarboxylic acid din-nonyl, 1,4-cyclohexanedicarboxylic acid diisononyl, 1,4-cyclohexanedicarboxylic acid Examples thereof include cyclohexanedicarboxylic acid esters such as diisodecyl.

Examples of the aliphatic polyvalent carboxylic acid ester include dimethyl adipate, dioctyl adipate, dioctyl sebacate, dibutyl sebacate, diisodecyl succinate, and tributyl acetylcitrate.

Examples of the unsaturated fatty acid ester include butyl oleate and the like.

Examples of the phosphoric acid ester include tricresyl phosphate and tributyl phosphate.

Examples of the hydrocarbon-based oil include alkyldiphenyl and partially hydrogenated terphenyl.

Examples of the epoxy plasticizer include epoxidized soybean oil and benzyl epoxy stearate.

Moreover, a polymer plasticizer can also be used. When a high molecular weight plasticizer is used, the initial physical properties can be maintained for a long period of time as compared with the case where a low molecular weight plasticizer is used. Further, it is possible to improve the drying property (paintability) when the alkyd paint is applied to the obtained cured product.

Examples of the polymer plasticizer include the following compounds.

A vinyl polymer obtained by polymerizing a vinyl monomer by various methods,
Ester compounds of polyalkylene glycols such as diethylene glycol dibenzoate, triethylene glycol dibenzoate, pentaerythritol ester,
Polyester-based plasticizers obtained from dibasic acids (eg sebacic acid, adipic acid, azelaic acid, phthalic acid, etc.) and dihydric alcohols (eg ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, etc.) ,
A polyether polyol such as polyethylene glycol, polypropylene glycol, or polytetramethylene glycol having a number average molecular weight of 500 or more, or a polyether compound such as a derivative obtained by converting the hydroxy group of these polyether polyols into an ester group, an ether group, or the like.
Polystyrene-based plasticizers such as polystyrene and poly-α-methylstyrene.

Further, polybutadiene, polybutene, polyisobutylene, butadiene-acrylonitrile, polychloroprene and the like can be mentioned.

Among the polymer plasticizers, those compatible with the component (A) are preferable, and polyether and vinyl-based polymers are particularly preferable.

When a polyether is blended as a plasticizer, surface curability and deep curability are improved, and polypropylene glycol is more preferable.

A vinyl polymer is preferable from the viewpoint of compatibility, weather resistance, and heat resistance. Among the vinyl-based polymers, acrylic polymers and / or methacrylic polymers are preferable, and acrylic polymers such as polyacrylic acid alkyl esters are more preferable. For the synthesis of this polymer, the living radical polymerization method is preferable, and the atom transfer radical polymerization method is more preferable because the molecular weight distribution is narrow and the viscosity can be lowered. Among them, a polymer obtained by continuous bulk polymerization of an acrylic acid alkyl ester-based monomer described in JP-A-2001-207157 at high temperature and high pressure (for example, manufactured by Toa Synthesis Co., Ltd., trade name: (Available as ARUFON) is most preferred.

The number average molecular weight of the polymer plasticizer is preferably 500 to 15,000, more preferably 800 to 10,000, even more preferably 1,000 to 8,000, and particularly preferably 1,000 to 5,000. Most preferably, 000 to 3,000. If the number average molecular weight is less than 500, the plasticizer will flow out over time due to heat or precipitation, and the initial physical properties cannot be maintained for a long period of time. Further, when the number average molecular weight exceeds 15,000, the viscosity becomes high and the workability deteriorates.

The molecular weight distribution (Mw / Mn) of the polymer plasticizer is not particularly limited, but is preferably narrow, preferably less than 1.80, more preferably 1.60 or less, further preferably 1.50 or less, and 1.40 or less. Is particularly preferable, and 1.30 or less is most preferable.

The number average molecular weight of the polymer plasticizer can be measured by the GPC method in the case of vinyl-based polymers and by the end group analysis method in the case of polyether-based polymers. The molecular weight distribution is measured by the GPC method (polystyrene conversion).

The polymeric plasticizer may or may not have a reactive silicon group. When it has a reactive silicon group, it can act as a reactive plasticizer and prevent the transfer of the plasticizer from the cured product. When it has a reactive silicon group, it is preferably 1 or less, more preferably 0.8 or less per molecule on average.

The plasticizers other than the component (C) may be used alone or in combination of two or more.

The amount of the plasticizer other than the component (C) used is preferably 0 to 150 parts by weight, more preferably 10 to 120 parts by weight, further preferably 20 to 110 parts by weight, and 30 parts by weight with respect to 100 parts by weight of the component (A). ~ 100 parts by weight is most preferable.

In the curable composition of the present invention, a curing catalyst can be used for the purpose of accelerating the curing of the component (A).

Examples of the curing catalyst include tetravalent organic tin compounds, carboxylic acids, carboxylic acid metal salts, amine compounds, and metal compounds other than tin.

Examples of the tetravalent organic tin compound include a dimethyl tin compound, a dibutyl tin compound, and a dioctyl tin compound.

Examples of the dimethyl tin compound include dimethyl tin diacetate and dimethyl tin bis (acetylacetonate).

Examples of the dibutyltin compound include dibutyltin dilaurate, dibutyltin diacetate, dibutyltin bis (2-ethylhexanoate), dibutyltin dioctanoate, dibutyltin phthalate, dibutyltin maleate, and dibutyltin bis (methylmaleate). Dibutyl tin bis (ethyl maleate), dibutyl tin bis (butyl maleate), dibutyl tin bis (n-octyl maleate), dibutyl tin bis (isooctyl maleate), dibutyl tin bis (tridecyl maleate), dibutyl Tin bis (benzyl maleate), dibutyl tin dimethoxide, dibutyl tin diphenoxide, dibutyl tin bis (nonylphenoxide), dibutyl tin bis (acetylacetonate), dibutyl tin bis (ethylacetoacetonate), dibutyl tin bistriethoxysilicate , A reaction product of dibutyltin oxide and an ester compound such as dioctylphthalate, diisodecylphthalate, and methylmalate can be mentioned.

Examples of the dioctyl tin compound include dioctyl tin diacetate, dioctyl tin distearate, dioctyl tin dilaurate, dioctyl tin bis (ethyl maleate), dioctyl tin bis (n-octyl maleate), and dioctyl tin bis (isooctyl maleate). , Dioctyltin bis (acetylacetonate), dioctyltin bistriethoxysilicate, and reactants of dioctyltin oxide with ester compounds such as dioctylphthalate, diisodecylphthalate, and methylmalate.

Examples of the carboxylic acid include 2-ethylhexanoic acid and versatic acid.

Examples of the metal carboxylic acid salt include divalent tin carboxylic acids such as tin octylate, tin 2-ethylhexanoate, tin naphthenate, tin stearate, tin versaticate, and tin neodecanoate; lead carboxylic acid and carboxylic acid. Examples thereof include bismuth, potassium carboxylate, calcium carboxylate, barium carboxylate, titanium carboxylate, zirconium carboxylate, hafnium carboxylate, vanadium carboxylate, manganese carboxylate, and iron carboxylate. In addition, a reaction product and / or a mixture of divalent tin carboxylate and an amine compound such as lauryl amine can be mentioned.

Examples of the amine compound include laurylamine, diethylaminopropylamine, 1- (o-tolyl) biguanide, guanidine, 1-phenylguanidine, diphenylguanidine, 1,8-diazabicyclo (5,4,0) undecene-7 (DBU). ) Etc. can be given.

Examples of metal compounds other than tin include titanium such as tetrabutyl titanate, tetrapropyl titanate, titanium tetrakis (acetylacetonate), bis (acetylacetonate) diisopropoxytitanium, and diisopropoxytitanium bis (ethylacetatete). Compounds: Organic aluminum compounds such as aluminum tris (acetylacetonate), aluminumtris (ethylacetacetate), and diisopropoxyaluminum ethylacetacetate; zirconium compounds such as zirconium tetrakis (acetylacetonate).

The curing catalyst may be used alone or in combination of two or more.

As the curing catalyst, a tetravalent organic tin compound is preferable, and a dibutyltin compound and a dioctyltin compound are more preferable because the strength is rapidly developed.

The amount of the curing catalyst used is preferably 0.05 to 20 parts by weight, more preferably 1 to 10 parts by weight, further preferably 1 to 7 parts by weight, and 1.5 to 5 parts by weight with respect to 100 parts by weight of the component (A). The weight part is most preferable. If it is less than 0.05 parts by weight, the curing rate tends to be slow. On the other hand, if it exceeds 20 parts by weight, the curing rate becomes too fast, and a good cured product cannot be obtained.

In the curable composition of the present invention, a filler can be used for the purpose of improving the workability of the curable composition and adjusting mechanical properties such as hardness, tensile strength and elongation of the cured product. As an example of the filler, an organic filler or an inorganic filler can be used.

Examples of the inorganic filler include other inorganic fillers such as silicic acid (silica) type, silicate (clay) type, carbon black, and carbonate.

Examples of the silicic acid (silica) system include synthetic silica such as precipitated silica, gel silica, dry silica, colloidal silica, and fumed silica; crystalline silica such as quartz and cristobalite; quartz glass (fused silica); Examples include diatomaceous earth and non-crystalline silica such as white carbon.

Examples of the silicate (clay) system include kaolin, calcined clay, talc, muscovite, wollastonite, serpentine, and pyrophyllite.

Other inorganic fillers such as carbonates include, for example, calcium carbonate, magnesium carbonate, dolomite, barium sulfate, titanium oxide, aluminum oxide, ferric acid, zinc oxide (zinc oxide), active zinc oxide, bentonite, etc. Shirasu balloons, glass balloons, etc. can be mentioned.

Examples of calcium carbonate include heavy calcium carbonate and precipitated calcium carbonate.

Examples of the precipitated calcium carbonate include light calcium carbonate having a major axis of 1 μm or more and colloidal calcium carbonate having an average particle diameter of 1 μm or less.

Further, surface-treated calcium carbonate obtained by treating the surface of these calcium carbonates can also be used.

Examples of the surface treatment agent include fatty acids such as stearic acid, fatty acid esters, modified fatty acids, resin acids such as rosin, paraffin wax, polyethylene wax, and cationic surfactants.

Examples of the organic filler include organic microballoons made of phenol resin or vinylidene chloride resin, resin powders such as PVC powder and PMMA powder, and the like.

When it is desired to obtain a cured product having high strength by using these fillers, mainly fumed silica, precipitated silica, crystalline silica, quartz glass (molten silica), dolomite, silicate (clay) type, carbon It is more preferable to use a filler selected from black, surface-treated calcium carbonate, active zinc flower and the like.

If you want to obtain a cured product with low strength and high breaking elongation, select mainly from titanium oxide, heavy calcium carbonate, magnesium carbonate, talc, ferric oxide, zinc oxide (zinc oxide), silas balloon, etc. It is preferable to use a filler that is used.

In general, the larger the specific surface area value of calcium carbonate, the greater the effect of improving the breaking strength, breaking elongation, and adhesiveness of the cured product. When calcium carbonate is used, it is preferable to use surface-treated colloidal calcium carbonate in combination with heavy calcium carbonate having a large particle size. The particle size of the surface-treated colloidal calcium carbonate is preferably 0.5 μm or less, and the surface treatment is preferably treated with a fatty acid or a fatty acid salt. The particle size of heavy calcium carbonate having a large particle size is preferably 1 μm or more, and either surface-treated and / or unsurface-treated calcium carbonate can be used.

These fillers may be used alone or in combination of two or more.

Of these fillers, calcium carbonate is preferably used from the viewpoint of achieving both the workability of the obtained curable composition and the physical properties of the cured product, and surface-treated colloidal calcium carbonate and heavy calcium carbonate may be used in combination. More preferred.

The amount of the filler used is preferably 10 to 500 parts by weight, more preferably 50 to 400 parts by weight, still more preferably 100 to 300 parts by weight, based on 100 parts by weight of the component (A).

In the curable composition of the present invention, a thixo-imparting agent can be used to prevent dripping and improve workability.

Examples of the thixophilic imparting agent include polyamide wax, hydrogenated castor oil derivative, and metal soap (for example, calcium stearate, aluminum stearate, barium stearate, etc.). Further, when a rubber powder having a particle diameter of 10 to 500 μm as described in JP-A-11-349916 or an organic fiber as described in JP-A-2003-155389 is used, the thixophilicity is high. A curable composition having good workability can be obtained.

The thixogenicity-imparting agent may be used alone or in combination of two or more.

The amount of the thixo-imparting agent used is preferably 0.1 to 20 parts by weight, more preferably 0.5 to 15 parts by weight, still more preferably 1 to 10 parts by weight, based on 100 parts by weight of the component (A).

In the curable composition of the present invention, a light stabilizer can be used for the purpose of preventing photooxidation deterioration of the cured product.

Examples of the light stabilizer include a benzotriazole-based light stabilizer, a hindered amine-based light stabilizer, a benzoate-based light stabilizer, and the like, and a hindered amine-based light stabilizer is particularly preferable.

Hindered amine light stabilizers include, for example, Tinuvin770, Tinuvin770DF, Tinuvin765, Tinuvin622LD, Tinuvin744, Tinuvin292, Tinuvin144, CHIMASSORB944FDL, CHIMASSORB944FDL, CHIMASSORB944FDL -62, ADEKA STAB LA-63P, ADEKA STAB LA-68, ADEKA STAB LA-67 (all of which are manufactured by ADEKA) and the like are available as commercial products.

The light stabilizer may be used alone or in combination of two or more.

The amount of the light stabilizer used is preferably 0.1 to 10 parts by weight, more preferably 0.2 to 5 parts by weight, based on 100 parts by weight of the component (A).

In the curable composition of the present invention, an ultraviolet absorber can be used for the purpose of enhancing the surface weather resistance of the cured product.

Examples of the ultraviolet absorber include benzophenone-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, salicylate-based ultraviolet absorbers, substituted trill-based and metal chelate-based compounds, and benzotriazole-based ultraviolet absorbers in particular. preferable.

Benzotriazole-based UV absorbers include, for example, Tinuvin P, Tinuvin234, Tinuvin326, Tinuvin237, Tinuvin328, Tinuvin329 (all manufactured by BASF Japan), Adekastab LA-29, Adekastab LA-32, and Adekastab LA-36. ), Etc. are available as commercial products.

The ultraviolet absorber may be used alone or in combination of two or more.

The amount of the ultraviolet absorber used is preferably 0.1 to 10 parts by weight, more preferably 0.2 to 5 parts by weight, based on 100 parts by weight of the component (A).

In the curable composition of the present invention, an antioxidant (antioxidant) can be used for the purpose of enhancing the weather resistance of the cured product.

Examples of the antioxidant include hindered phenolic antioxidants, monophenolic antioxidants, bisphenolic antioxidants, polyphenolic antioxidants, and the like, and in particular, hindered phenolic antioxidants. preferable.

Examples of hindered phenolic antioxidants include IRGANOX1010, IRGANOX1035 (all manufactured by BASF Japan), ADEKA STAB AO-20, ADEKA STAB AO-50, ADEKA STAB AO60, and ADEKA STAB AO-330 (all of which are manufactured by ADEKA). It is available as a commercial product.

The antioxidant may be used alone or in combination of two or more.

The amount of the antioxidant used is preferably 0.1 to 10 parts by weight, more preferably 0.2 to 5 parts by weight, based on 100 parts by weight of the component (A).

The curable compositions of the present invention include inorganic substrates such as glass, aluminum, stainless steel, zinc, copper and mortar, as well as vinyl chloride, acrylic, polyester, polyethylene and polypropylene under non-primer or primer-treated conditions. An adhesiveness-imparting agent can be used for the purpose of improving the adhesiveness with various adherends such as an organic base material such as polycarbonate.

Examples of the adhesiveness-imparting agent include aminosilane, epoxysilane, isocyanatesilane, mercaptosilane, vinyl-type unsaturated group-containing silane, halogen-containing silane, and isocyanurate silane.

Examples of aminosilanes include γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropyltriisopropoxysilane, γ-aminopropyldimethoxymethylsilane, γ-aminopropyldiethoxymethylsilane, and N-. (Β-Aminoethyl) -γ-Aminopropyltrimethoxysilane, N- (β-Aminoethyl) -γ-Aminopropyldimethoxymethylsilane, N- (β-Aminoethyl) -γ-Aminopropyltriethoxysilane, N -(Β-Aminoethyl) -γ-aminopropyldiethoxymethylsilane, N- (β-aminoethyl) -γ-aminopropyltriisopropoxysilane, N- (β- (β-aminoethyl) aminoethyl)- γ-Aminopropyltrimethoxysilane, N- (6-aminohexyl) -γ-aminopropyltrimethoxysilane, γ- (N-ethylamino) -β-methylpropyltrimethoxysilane, γ-ureidopropyltrimethoxysilane, γ-Ureidopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N-benzyl-γ-aminopropyltrimethoxysilane, N-vinylbenzyl-γ-aminopropyltriethoxysilane, N-cyclohexylaminomethyl Triethoxysilane, N-cyclohexylaminomethyldiethoxymethylsilane, N-phenylaminomethyltrimethoxysilane, (β-aminoethyl) aminomethyltrimethoxysilane, N, N'-bis [3- (trimethoxysilyl) propyl ] Amino group-containing silane compounds such as ethylenediamine can be mentioned. In addition, ketimine-type silane compounds such as N- (1,3-dimethylbutylidene) -3- (triethoxysilyl) -1-propaneamine can be mentioned.

Examples of the epoxy silane include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyldimethoxymethylsilane, and β- (3,4-epoxycyclohexyl) ethyltrimethoxy. Examples thereof include silane and β- (3,4-epoxycyclohexyl) ethyltriethoxysilane.

Examples of the isocyanate silane include γ-isocyanatepropyltrimethoxysilane, γ-isocyanatepropyltriethoxysilane, γ-isocyanatepropyldiethoxymethylsilane, γ-isocyanatepropyldimethoxymethylsilane, isocyanatemethyltrimethoxysilane, and isocyanatemethyldimethoxymethyl. Can be given as silane.

Examples of the mercaptosilane include γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, γ-mercaptopropyldimethoxymethylsilane, γ-mercaptopropyldiethoxymethylsilane, and mercaptomethyltriethoxysilane. it can.

Examples of the carboxysilane include β-carboxyethyltriethoxysilane, β-carboxyethylphenylbis (2-methoxyethoxy) silane, N-β- (carboxymethyl) aminoethyl-γ-aminopropyltrimethoxysilane, and the like. be able to.

Examples of the vinyl-type unsaturated group-containing silane include vinyltrimethoxysilane, vinyltriethoxysilane, 3- (meth) acryloyloxypropyltrimethoxysilane, 3- (meth) acryloyloxypropyldimethoxymethylsilane, and 3- (meth). ) Acryloyloxypropyltriethoxysilane, 3- (meth) acryloyloxypropyldiethoxymethylsilane, (meth) acryloyloxymethyltrimethoxysilane, (meth) acryloyloxymethyldimethoxymethylsilane, (meth) acryloyloxymethyltriethoxysilane , (Meta) acryloyloxymethyldiethoxymethylsilane and the like can be mentioned.

Examples of the halogen-containing silane include γ-chloropropyltrimethoxysilane.

Examples of the isocyanurate silane include tris (trimethoxysilyl) isocyanurate.

Among these adhesive-imparting agents, aminosilane or epoxysilane is preferable, and γ-aminopropyltrimethoxysilane and N- (β-aminoethyl) -γ-aminopropyltrimethoxy are preferable in order to ensure good adhesiveness. Silane, N- (β-aminoethyl) -γ-aminopropyldimethoxymethylsilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyldimethoxymethylsilane Preferably, γ-aminopropyltrimethoxysilane, N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane, N- (β-aminoethyl) -γ-aminopropyldimethoxymethylsilane are particularly preferable.

The adhesiveness-imparting agent may be used alone or in combination of two or more.

The amount of the adhesiveness-imparting agent used is preferably 0.01 to 20 parts by weight, more preferably 0.1 to 10 parts by weight, still more preferably 1 to 7 parts by weight, based on 100 parts by weight of the component (A). If the amount of the adhesive-imparting agent used is less than 0.01 parts by weight, sufficient adhesiveness may not be obtained. If the amount used exceeds 20 parts by weight, the cured product may become brittle and sufficient strength may not be obtained, or the curing rate may slow down.

For the curable composition, a one-component composition in which all the compounding agents are mixed, a polymer of the main component, a curing catalyst, etc. are stored separately in separate packages, and mixed immediately before use. There is a two-component composition to be used. The curable composition of the present invention can be used for any type. However, since it is easy to use, it is suitable to be used as a one-component composition.

When the curable composition is a one-component composition, all the compounding components are pre-blended. Therefore, the moist-containing compounding components are used after being dehydrated and dried in advance, or by reducing the pressure during compounding and kneading. It is preferable to dehydrate. When the curable composition is a two-component composition, it is not necessary to mix a curing catalyst with a main agent containing a polymer having a reactive silicon group, so that even if the compounding agent contains a small amount of water. Although there is little concern about gelation, dehydration drying is preferable when long-term storage stability is required. As the dehydration and drying method, a heat drying method or a vacuum dehydration method is preferable for a solid substance such as powder, and a vacuum dehydration method or a synthetic zeolite, activated alumina, silica gel, quicklime, magnesium oxide, etc. are used for a liquid substance. The dehydration method used is preferred. In addition to this dehydration drying method, n-propyltrimethoxysilane, vinyltrimethoxysilane, vinylmethyldimethoxysilane, methylsilicate, ethylsilicate, γ-mercaptopropyldimethoxymethylsilane, γ-mercaptopropyldiethoxymethylsilane, γ- An alkoxysilane compound such as glycidoxypropyltrimethoxysilane may be added and reacted with water for dehydration. Alternatively, an oxazolidine compound such as 3-ethyl-2-methyl-2- (3-methylbutyl) -1,3-oxazolidine may be blended and reacted with water to dehydrate. Further, a small amount of the isocyanate compound may be blended and the isocyanate group may be reacted with water for dehydration.

The amount of the dehydrating agent, particularly the silicon compound capable of reacting with water such as vinyltrimethoxysilane, is preferably 0.1 to 20 parts by weight, more preferably 0.5 to 10 parts by weight, based on 100 parts by weight of the component (A). preferable.

Additives other than the above may be added to the curable composition of the present invention, if necessary, for the purpose of adjusting various physical properties of the curable composition or the cured product.

Examples of such additives include oxygen curable substances (for example, dry oils such as millet oil and flaxseed oil), photocurable substances (for example, unsaturated acrylic compounds), and monovalent silanol groups by hydrolysis. Compounds that produce compounds with (eg, trimethylsilanol) (eg, tris (trimethylsilyloxy) propane, phenyloxytrimethylsilane, trimethylolpropane tristrimethylsilyls, etc.), physical property modifiers such as dialkyldialkoxysilane, adhesive The imparting resin (for example, styrene-based copolymer, phenol resin, modified phenol resin, terpene-based resin, terpene phenol resin, xylene-phenol resin, cyclopentadiene resin, cyclopentadiene-phenol resin, kumaron inden resin, rosin-based resin, Rosin ester resin, hydrogenated rosin ester resin, xylene resin, low molecular weight polystyrene resin, petroleum resin, hydrogenated petroleum resin, etc.), silicate compounds (for example, tetraalkoxysilane or its partially hydrolyzed condensate), heat-expandable fine particles Hollow bodies, inorganic balloons (eg, glass balloons, silas balloons, silica balloons, fly ash balloons), organic balloons (eg, phenolic resins, epoxy resins, urea resins, vinylidene chloride resins, polystyrene resins, styrene copolymers) , Polymethacrylate, polyvinyl alcohol, vinylidene chloride-acrylonitrile copolymer, acrylonitrile-methacrylonitrile copolymer, acrylonitrile-methylmethacrylate copolymer, vinylidene chloride-acrylonitrile-divinylbenzene copolymer, etc. Resin balloon), curability modifier, radical banning agent, metal inactivating agent, ozone deterioration inhibitor, phosphorus-based peroxide decomposition agent, lubricant, pigment, foaming agent, terminicide, mold proofing agent, flame retardant, etc. Can be given. These additives may be used alone or in combination of two or more.

The method for producing the curable composition of the present invention is not particularly limited. For example, the above-mentioned components are blended, and a mixer, a roll, a kneader, or the like is used at room temperature or heating, atmospheric pressure or reduced pressure, batch type or continuous. Ordinary methods such as kneading with the formula or dissolving and mixing the components using a small amount of a suitable solvent can be used.

When the curable composition of the present invention is exposed to the atmosphere, it forms a three-dimensional network structure by the action of moisture and is cured into a cured product having rubber-like elasticity.

The curable composition of the present invention is an adhesive, a sealing material for buildings, ships, automobiles, roads, etc., an adhesive, a molding agent, a vibration isolator, a vibration damping material, a soundproofing material, a foam material, a paint, and a spraying material. Can be used for such as. The cured product obtained by curing the curable composition of the present invention is excellent in flexibility and adhesiveness, and therefore, among these, it is more preferable to use it as a sealing material or an adhesive.

In addition, solar cell backside encapsulants, electrical and electronic component materials, electrical insulation materials such as insulation coating materials for electric wires and cables, elastic adhesives, contact adhesives, spray sealants, crack repair materials, powder paints, etc. Casting materials, medical rubber materials, medical adhesives, medical equipment sealants, food packaging materials, sealing materials for joints of exterior materials such as sizing boards, coating materials, primers, conductive materials for shielding electromagnetic waves, thermal conductivity Materials, hot melt materials, electric / electronic potting agents, films, gaskets, various molding materials, wire-reinforced glass and laminated glass end faces (cut parts) rustproof / waterproof encapsulants, automobile parts / electrical parts / various machines It can be used for various purposes such as liquid sealants for parts.

Furthermore, since it can adhere to a wide range of substrates such as glass, porcelain, wood, metal, and resin molded products by itself or by using a primer, it can also be used as various types of sealing agent compositions and adhesive compositions. is there. The curable composition of the present invention is an adhesive for interior panels, an adhesive for exterior panels, an adhesive for tiles, an adhesive for stones, an adhesive for ceiling finishing, an adhesive for floor finishing, and an adhesive for wall finishing. Adhesives, vehicle panel adhesives, electrical / electronic / precision equipment assembly adhesives, direct glazing sealants, multi-layer glass sealants, SSG method sealants, or building working joint sealants, It can also be used as a waterproof material with asphalt.

The present invention will be specifically described below, but the present invention is not limited thereto.
(Synthesis Example 1)
Using polyoxypropylene diol having a molecular weight of 2,000 as an initiator, propylene oxide was polymerized in the presence of a zinc hexacyanocovalent glyme complex catalyst to obtain a hydroxyl group-terminated polypropylene oxide having a number average molecular weight of 16,000 (liquid feeding system). : GPC of HLC-8120 manufactured by Tosoh, column: TSK-GEL H type manufactured by Tosoh, solution: polystyrene-equivalent molecular weight measured using THF). After adding 1.2 times equivalent of a methanol solution of NaOMe to the hydroxyl group of this hydroxyl group-terminated polypropylene oxide, methanol was distilled off, and 1.7 times equivalent of allyl chloride was added to the hydroxyl group to add 1.7 times equivalent of allyl chloride to the terminal. The hydroxyl group was converted to an allyl group.

300 parts by weight of n-hexane and 300 parts by weight of water were mixed and stirred with respect to 100 parts by weight of the obtained unpurified allyl-terminated polypropylene oxide, and then water was removed by centrifugation. 300 parts by weight of water was further mixed and stirred with the obtained hexane solution, water was removed by centrifugation again, and then hexane was removed by vacuum devolatile. By these operations, an allyl group-terminated polypropylene oxide having a number average molecular weight of about 16,000 was obtained.

100 parts by weight of the obtained allyl group-terminated polypropylene oxide and 1.3 parts by weight of dimethoxymethylsilane were reacted at 90 ° C. for 2 hours using 150 ppm of an isopropanol solution having a platinum content of 3% by weight of a platinum vinylsiloxane complex as a catalyst.

As a result, the number average molecular weight was 16,000 (polystyrene-equivalent molecular weight measured by GPC), and the polyoxypropylene-based weight having an average of 1.3 dimethoxymethylsilyl groups per molecule at the end was analyzed by ^{1 H-NMR.} A coalescence (a1) was obtained.

(Synthesis Example 2)
Polymerization of propylene oxide using a 1/1 (weight ratio) mixture of polyoxypropylene diol having a molecular weight of about 2,000 and polyoxypropylene triol having a molecular weight of about 3,000 as an initiator in the presence of a zinc hexacyanocovalent glyme complex catalyst. (Liquid feeding system: GPC of HLC-8120 manufactured by Tosoh, column: TSK-GEL H type manufactured by Tosoh, solution: polystyrene measured using THF) Converted molecular weight). After adding 1.2 times equivalent of a methanol solution of NaOMe to the hydroxyl group of this hydroxyl group-terminated polypropylene oxide, methanol was distilled off, and 1.7 times equivalent of allyl chloride was added to the hydroxyl group to add 1.7 times equivalent of allyl chloride to the terminal. The hydroxyl group was converted to an allyl group.

300 parts by weight of n-hexane and 300 parts by weight of water were mixed and stirred with respect to 100 parts by weight of the obtained unpurified allyl-terminated polypropylene oxide, and then water was removed by centrifugation. 300 parts by weight of water was further mixed and stirred with the obtained hexane solution, water was removed by centrifugation again, and then hexane was removed by vacuum devolatile. By these operations, an allyl group-terminated polypropylene oxide having a number average molecular weight of about 19,000 was obtained.

100 parts by weight of the obtained allyl group-terminated polypropylene oxide and 1.35 parts by weight of methyldimethoxysilane were reacted at 90 ° C. for 2 hours using 150 ppm of an isopropanol solution having a platinum content of 3% by weight of a platinum vinylsiloxane complex as a catalyst.

As a result, the number average molecular weight was 19,000 (polystyrene-equivalent molecular weight measured by GPC), and the polyoxypropylene-based weight having an average of 1.7 dimethoxymethylsilyl groups per molecule at the end was analyzed by ^{1 H-NMR.} A coalescence (a2) was obtained.

(Example 1)
Diisodecyl phthalate (J-PLUS Co., Ltd.) was used as a plasticizer for a total of 100 parts by weight of the polymer (a1) obtained in Synthesis Example 1 and 70 parts by weight of the polymer (a2) obtained in Synthesis Example 2. Made by Plus, trade name: DIDP) 45 parts by weight, amide-based solvent (manufactured by Idemitsu Kosan Co., Ltd., trade name: Equamid M-100, CH ₃ O-CH ₂ CH _2- CONR ¹⁴ R ¹⁵ , where R ¹⁴ and R ¹⁵ is an alkyl group) 45 parts by weight, surface-treated colloidal calcium carbonate (manufactured by Takehara Chemical Industry Co., Ltd., trade name: NEOLIGHT SP) 160 parts by weight, heavy calcium carbonate (manufactured by Maruo Calcium Co., Ltd., trade name: LM2200) 54 parts by weight, titanium oxide (manufactured by Ishihara Sangyo Co., Ltd., trade name: Typake R820) 20 parts by weight, thioxogenic agent (manufactured by Cray Valley, trade name: Polymer plastic SL) 2 parts by weight, light stabilizer (BASF) Weigh 1 part by weight of Japan Co., Ltd., trade name: Tinuvin770) and 1 part by weight of UV absorber (BASF Japan Co., Ltd., trade name: Tinuvin326), mix using a spatula, and then put into a 3-roll mill. Dispersed through 3 times. After that, it is dried under reduced pressure at 120 ° C. for 2 hours using a planetary mixer, cooled to 50 ° C. or lower, and then vinyltrimethoxysilane (manufactured by Momentive Performance Materials, trade name: Silkgest A-171) as a dehydrating agent. Add 3 parts by weight and 3 parts by weight of N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane (manufactured by Momentive Performance Materials, trade name: Silkest A-1120) as an adhesive-imparting agent and mix. did. Further, 2 parts by weight of dibutyl tin bis (acetylacetonate) (manufactured by Nitto Kasei Co., Ltd., trade name: Neostan U-220H) was added and mixed as a condensation catalyst to obtain a curable composition. The obtained curable composition was filled in a moisture-proof container and sealed to obtain a one-component curable composition.

(Example 2)
Instead of 45 parts by weight of the amide solvent of Example 1, the amide solvent (manufactured by Idemitsu Kosan Co., Ltd., trade name: Equamid B-100, CH ₃ CH ₂ CH ₂ CH ₂ O-CH ₂ CH _2- CONR ¹⁶ A one-component curable composition was obtained in the same manner as in Example 1 except that 45 parts by weight of ^{R 17} , where R ¹⁶ and R ^{17 were alkyl groups) were used.}

(Comparative Example 1)
A one-component curable composition was obtained in the same manner as in Example 1 except that 90 parts by weight of the plasticizer (DIDP) was used instead of 45 parts by weight of the plasticizer and 45 parts by weight of the amide solvent of Example 1. It was.

(Comparative Example 2)
A one-component curable composition was obtained in the same manner as in Example 1 except that 45 parts by weight of the plasticizer (DIDP) was used instead of 45 parts by weight of the plasticizer and 45 parts by weight of the amide solvent of Example 1. It was.

(Comparative Example 3)
Example 1 and Example 1 except that 45 parts by weight of 1-dodecyl-2-pyrrolidone (manufactured by Ashland, trade name: Surfadone LP-300) was used as the pyrrolidone solvent instead of 45 parts by weight of the amide solvent of Example 1. In the same manner, a one-component curable composition was obtained.

(Comparative Example 4)
Same as in Example 1 except that 45 parts by weight of N-methyl-2-pyrrolidone (manufactured by Kishida Chemical Co., Ltd., reagent) was used as the pyrrolidone solvent instead of 45 parts by weight of the amide solvent of Example 1. A one-component curable composition was obtained.

The curable composition obtained above was evaluated for viscosity, skinning time, deep curability, and residual tack.

(viscosity)
Under the conditions of 23 ° C. and 50% RH, the curable composition at the initial stage and after storage (50 ° C. × 4 weeks) was filled in a cup having a capacity of 100 ml so as to prevent bubbles from entering. BS type viscometer and rotor No. manufactured by Toki Sangyo Co., Ltd. 7 was used to measure the viscosity of the curable composition at a rotor speed of 2 rpm under the conditions of 23 ° C. and 50% RH. The measurement results are shown in Table 1.

(Leather time)
Under the conditions of 23 ° C. and 50% RH, the curable composition at the initial stage and after storage (50 ° C. × 4 weeks) was stretched with a spatula to a thickness of about 3 mm. The surface of the curable composition was lightly touched with a microspatula over time, and the time until the curable composition did not reach the microspatula was measured. The measurement results are shown in Table 1.

(Deep curability)
Under the conditions of 23 ° C. and 50% RH, the curable composition at the initial stage and after storage (50 ° C. x 4 weeks) was filled in a polyethylene tube having a diameter of 12 mm so as to prevent air bubbles from entering, and the surface was covered with a spatula. The test piece was prepared by scraping so that the test piece was horizontal. After leaving the test piece for 7 days under the conditions of 23 ° C. and 50% RH, the cured portion of the surface layer was turned over, the uncured portion was removed cleanly, and then the thickness of the cured portion was measured using a caliper. .. The measurement results are shown in Table 1.

(Residual tack)
Under the conditions of 23 ° C. and 50% RH, the curable composition at the initial stage and after storage (50 ° C. × 4 weeks) was stretched with a spatula to a thickness of about 3 mm. After leaving it at 23 ° C. and 50% RH, the surface was lightly touched with a fingertip after 1 day and 7 days, and the degree of stickiness was evaluated. The sticky feeling was expressed by a number in 8 steps, 8 was judged as no stickiness at all, 5 was a little sticky feeling, 3 was a strong sticky feeling, and 1 was not cured. The measurement results are shown in Table 1.

As is clear from Table 1, it can be seen that the curable composition of the present invention is excellent in deep curability and is less likely to cause a delay in curing after storage.

Claims (8)

A curable composition comprising (A) an organic polymer having a reactive silicon group and (B) an amide-based solvent which is β-alkoxypropionamide .
A curable composition, wherein the reactive silicon group of the component (A) is represented by the following general formula (1) .
−SiR ¹ _3-a X _a (1)
(Here, in the general formula (1), R ¹ is independently an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, or −OSi. (R') ₃ (In the formula, R'independently represents a hydrocarbon group having 1 to 20 carbon atoms) represents a triorganosyloxy group. X independently represents a hydroxyl group or a hydrolyzable group. Shown. A is an integer from 1 to 3.) The main chain of the component (A) has (A1) a polyoxyalkylene-based polymer having a reactive silicon group, (A2) a saturated hydrocarbon-based polymer having a reactive silicon group, and (A3) a reactive silicon group. The curable composition according to claim 1, wherein the curable composition is at least one selected from the group consisting of (meth) acrylic acid ester-based (co) polymers. Component (A), (A4) having a reactive silicon group, curable according to any of claims 1-2 which is an organic polymer containing a urethane bond and / or urea linkages and feature Composition. The curable composition according to any one of claims 1 to 3 , wherein the component (B) β-alkoxypropionamide is a compound represented by the following general formula (9).
R ¹⁰ O-CH ₂ CHR ^13- CONR ¹¹ R ¹² (9)
(Here, in the general formula (9), R ¹⁰ represents a linear, branched or cyclic saturated hydrocarbon group having 1 to 18 carbon atoms. R ¹¹ and R ¹² independently form a hydrogen atom or an ether bond, respectively. It represents a monovalent linear or branched saturated hydrocarbon group which may have, they may be the same or different, and they may be bonded to each other to form a ring structure. It may have a heterocyclic structure in which nitrogen is a hetero atom, or a heterocyclic structure in which a nitrogen atom and an oxygen atom are hetero atoms. R ¹³ indicates a hydrogen atom or a methyl group.) The curable composition according to any one of claims 1 to 4 , further comprising (C) a phthalate ester-based plasticizer. A sealing material composition containing the curable composition according to any one of claims 1 to 5. An adhesive composition containing the curable composition according to any one of claims 1 to 5. A cured product of the curable composition according to any one of claims 1 to 5.