JP5540781B2 - Hydrolyzable silyl group-containing oxyalkylene polymer and method for producing curable composition - Google Patents

Description

  The present invention relates to a curable composition curable in the presence of moisture and a method for producing a hydrolyzable silyl group-containing oxyalkylene polymer as a raw material.

Methods for curing various polymers containing hydrolyzable silyl groups and using them for sealing materials, adhesives and the like are well known and industrially useful. Among such polymers, the polymer whose main chain is polyoxyalkylene is liquid at room temperature, and the cured product retains flexibility even at a relatively low temperature. Therefore, it is used for sealing materials and adhesives. In some cases, it has favorable characteristics.
In addition, methods for improving strength, adhesion and weather resistance by using these hydrolyzable silyl group-containing polymers in combination with epoxy resins and acrylic resins are also widely known and industrially useful methods. It has become.

As the hydrolyzable silyl group-containing oxyalkylene polymer, a polymer having a relatively high molecular weight is used because of excellent physical properties such as curability, elongation, and strength. As a method for obtaining such a polymer, a polyol having a molecular weight of about 3000 such as a polyoxyalkylene diol having a molecular weight of about 3000 (hereinafter referred to as an easily available polyol) is used as a raw material to react with a polyvalent halogen compound to increase the molecular weight. Next, a method is known in which an unsaturated group is introduced at the molecular end and a hydrolyzable group-containing silicon hydride compound is reacted with the unsaturated group (see Patent Documents 1 and 2).
Also, a method of converting terminal groups of readily available polyols into unsaturated groups, then reacting a polyvalent silicon hydride compound to increase the molecular weight, and further converting the remaining hydrogenated silyl groups into hydrolyzable group silyl groups (See Patent Documents 3, 4, 5, 6, and 7).

  However, all of the above known methods are easy to obtain, and are methods for obtaining a high molecular weight polymer by using polyoxypropylene glycol having a molecular weight of about 3000 as a raw material and increasing the amount thereof. Therefore, the hydrolyzable silyl group-containing polymer as the final product contains many low molecular weight hydrolyzable silyl group-containing organic polymers derived from the readily available polyol as the raw material, and such low molecular weight curability. Due to the presence of the polymer, there was a drawback of poor curability.

  On the other hand, a hydrolyzable silyl group-containing oxyalkylene obtained by using an oxyalkylene polymer having a high molecular weight and a narrow molecular weight distribution obtained by reacting an alkylene oxide with a double metal cyanide complex as a catalyst in the presence of an initiator. A method for producing a polymer has been proposed (see Patent Document 8). The polymer obtained by this method is superior in curability because it has a low content of low molecular weight polymer compared to conventionally known polymers and can be made higher molecular weight when compared at the same viscosity. , Has a characteristic of having a large elongation at break. However, even when such a curable composition containing a hydrolyzable silyl group-containing oxyalkylene polymer having a narrow molecular weight distribution is used as a sealing material or an adhesive, there are cases where the curability is still insufficient. It was.

Japanese Patent Laid-Open No. 53-134095 Japanese Patent Laid-Open No. 55-13768 Japanese Patent Laid-Open No. 55-13767 Japanese Patent Laid-Open No. 55-13768 JP 59-131625 A JP 57-158226 A JP 58-42619 A JP-A-3-72527

  An object of the present invention is to obtain a curable composition that solves the above-mentioned drawbacks, and a curable composition with improved curability and a hydrolyzable silyl group having a high molecular weight and a narrow molecular weight distribution as a raw material. It is to provide a containing oxyalkylene polymer.

That is, the present invention is the following invention.
[1] An alkylene which is a double metal cyanide complex catalyst in which an organic ligand comprising t-butyl alcohol or t-butyl alcohol and a compound represented by the following chemical formula (1) is coordinated to an initiator and a zinc hexacyanocobaltate complex Alkylene oxide is reacted in the presence of an oxide ring-opening polymerization catalyst to obtain a hydroxyl group-terminated oxyalkylene polymer (polymer (A)) having a number average molecular weight of 5000 to 30000 and a total unsaturation of 0.02 meq / g or less. Then, after converting the terminal hydroxyl group of the polymer (A) to an alkoxide, 0.8 to 1.9 moles of the compound represented by the formula (2) with respect to 1 mole of the terminal hydroxyl group of the polymer (A). The compound is reacted with a saturated group-containing compound to be converted into an unsaturated group, and the compound (B) having a functional group capable of addition reaction with the unsaturated group and a hydrolyzable silyl group is further reacted. Characterized the door, obtained by the method for producing a hydrolyzable silyl group-containing oxyalkylene polymer, wherein the terminal of the oxyalkylene polymer of the polymer (A) via an ether bond represented by the formula (2) A hydrolyzable silyl group-containing oxyalkylene polymer to which a —R ³ —C (R ² ) (—) — CH ₂ — group derived from an unsaturated group-containing compound is bonded and having a hydrolyzable silyl group at the terminal .
R ¹ —C (CH ₃ ) ₂ (OR ⁰ ) _n OH (1)
In the formula (1), R ¹ is a methyl group or an ethyl group, R ⁰ is an ethylene group or a group in which a hydrogen atom of the ethylene group is substituted with a methyl group or an ethyl group, and n is an integer of 1 to 3. .
_{^{CH 2 = C (R 2)}} -R 3 -X ··· (2)
In formula (2), R ² is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, R ³ is a divalent hydrocarbon group, and X is a halogen atom.

[2] Oite above hydrolyzable silyl group-containing oxyalkylene polymer,
The hydrolyzable silyl according to [1], wherein the alkylene oxide ring-opening polymerization catalyst is a double metal cyanide complex catalyst in which t-butyl alcohol and ethylene glycol mono-t-butyl ether are coordinated as organic ligands. Group-containing oxyalkylene polymer .

[3] [1] or room temperature curable composition and a hydrolyzable silyl group-containing oxyalkylene polymer, characterized that you containing a filler and a curing catalyst according to [2].
[4] before Symbol room temperature curable composition according to the room-temperature-curable composition is a sealing curable composition [3].
[5] A sealing agent comprising the sealing curable composition according to [4].

The polymer of the present invention has a fast feature curing rate as compared with the conventional polymer. The curable composition using this as a raw material is suitable for a sealing material, an adhesive and the like.

In the present invention, the hydroxyl-terminated oxyalkylene polymer (polymer (A)), which is a raw material for the hydrolyzable silyl group-containing oxyalkylene polymer, reacts with the alkylene oxide in the presence of an initiator and an alkylene oxide ring-opening polymerization catalyst. Can be obtained.
As the initiator, an active hydrogen-containing compound can be used, and examples thereof include the following compounds. The following may be used individually by 1 type, or may use 2 or more types together. Moreover, the compound which has 1-4 active hydrogen atoms in 1 molecule is especially preferable.

  water. monohydric alcohols such as n-butanol; Monovalent unsaturated group-containing alcohols such as allyl alcohol and propenyl alcohol. Ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-propanediol, neopentyl glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanediol Polyhydric alcohols such as glycerin, diglycerin, trimethylolpropane, pentaerythritol, glucose, sorbitol, sucrose, and methylglycoside. Alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine. Phenolic compounds such as bisphenol A, bisphenol F, bisphenol S, resorcin, and hydroquinone. Aliphatic amines such as ethylenediamine, diethylenetriamine, and hexamethylenediamine. Or an oxyalkylene polymer having a lower molecular weight than the target product (hydrolyzable silyl group-containing oxyalkylene polymer) obtained by reacting these with an alkylene oxide.

Examples of the alkylene oxide include ethylene oxide, propylene oxide, 1,2-butylene oxide, 2,3-butylene oxide, isobutylene oxide, epichlorohydrin, epibromohydrin, methyl glycidyl ether, allyl glycidyl ether, butyl glycidyl ether, and 2-ethyl. Examples include xylene glycidyl ether and trifluoropropylene oxide. These may be used alone or in combination of two or more. Of these, propylene oxide is preferred.
In the present invention, the alkylene oxide ring-opening polymerization catalyst is a composite metal cyanide complex in which a zinc hexacyanocobaltate complex is coordinated with an organic ligand composed of t-butyl alcohol or t-butyl alcohol and a compound represented by the chemical formula (1). It is a catalyst. This composite metal cyanide complex catalyst is obtained by reacting a reaction product (hereinafter referred to as catalyst skeleton) obtained by reacting zinc halide and alkali metal cyanocobaltate in water with t-butyl alcohol or t-butyl alcohol and a chemical formula (1 And those produced by coordinating an organic ligand comprising a compound represented by

As the metal of the metal halide salt, Zn (II), Fe (II), Fe (III), Co (II), Ni (II), Mo (IV), Mo (VI), Al (III), V One selected from (V), Sr (II), W (IV), W (VI), Mn (II), Cr (III), Cu (II), Sn (II), and Pb (II) Two or more are preferably used. Zn (II) or Fe (II) is particularly preferred.
The metal constituting the cyano metalate of the alkali metal cyano metalate is Fe (II), Fe (III), Co (II), Co (III), Cr (II), Cr (III), Mn (II) , Mn (III), Ni (II), V (IV), and V (V) are preferably used alone or in combination. Co (III) or Fe (III) is particularly preferred.

Synthesis reaction catalyst skeleton is preferably carried out by mixing zinc halide aqueous solution and an alkali metal cyano cobaltate solution, it is more preferably carried out dropwise alkali metal cyano cobaltate solution to zinc halide solution. The reaction temperature is preferably 0 ° C. or higher and lower than 70 ° C., more preferably 30 ° C. or higher and lower than 70 ° C.
As the catalyst skeleton , Zn ₃ [Co (CN) ₆ ] ₂ (that is, zinc hexacyanocobaltate complex) is more preferable.

Next, a compound to be an organic ligand is liganded to the catalyst skeleton. To use a mixture of the compound represented by the t- butyl alcohol or t- butyl alcohol and formula as the organic ligand (1) in the present invention.
As a compound used together with t-butyl alcohol, a compound represented by the following formula (1), ethanol, s-butyl alcohol, n-butyl alcohol, isobutyl alcohol, t-pentyl alcohol, isopentyl alcohol, N , N-dimethylacetamide, glyme, diglyme, triglyme, isopropyl alcohol, dioxane, and one or more compounds selected from polyethers having a number average molecular weight of 150 or more are preferred.

R ¹ —C (CH ₃ ) ₂ (OR ⁰ ) _n OH (1)
In the formula (1), R ¹ is a methyl group or an ethyl group, R ⁰ is an ethylene group or a group in which a hydrogen atom of the ethylene group is substituted with a methyl group or an ethyl group, and n is an integer of 1 to 3. .
Examples of the compound represented by the formula (1) include the following compounds.
Ethylene glycol mono-t-butyl ether, propylene glycol mono-t-butyl ether, 1,2-butylene glycol mono-t-butyl ether, isobutylene glycol mono-t-butyl ether, ethylene glycol mono-t-pentyl ether, propylene glycol mono-t -Pentyl ether, 1,2-butylene glycol mono-t-pentyl ether, isobutylene glycol mono-t-pentyl ether, diethylene glycol mono-t-butyl ether, dipropylene glycol mono-t-butyl ether, di-1,2-butylene glycol Mono-t-butyl ether, diisobutylene glycol mono-t-butyl ether, diethylene glycol mono-t-pentyl ether, dipropylene glycol mono-t Pentyl ether, di-1,2-butylene glycol mono-t-pentyl ether, diisobutylene glycol mono-t-pentyl ether, triethylene glycol mono-t-butyl ether, tripropylene glycol mono-t-butyl ether, tri-1, 2-butylene glycol mono-t-butyl ether, triisobutylene glycol mono-t-butyl ether, triethylene glycol mono-t-pentyl ether, tripropylene glycol mono-t-pentyl ether, tri-1,2-butylene glycol mono-t -Pentyl ether, triisobutylene glycol mono-t-pentyl ether.

  Of these, the compound used in combination with t-butyl alcohol is particularly preferably a compound represented by the formula (1): ethylene glycol mono-t-butyl ether, propylene glycol mono-t-butyl ether, ethylene glycol mono-t-pentyl. Ether, propylene glycol mono-t-pentyl ether, diethylene glycol mono-t-butyl ether, diethylene glycol mono-t-butyl ether, triethylene glycol mono-t-butyl ether, and triethylene glycol mono-t-pentyl ether are more preferable. More preferred are ethylene glycol mono-t-butyl ether, propylene glycol mono-t-butyl ether, ethylene glycol mono-t-pentyl ether, and propylene glycol mono-t-pentyl ether, and most preferred is ethylene glycol mono-t-butyl ether.

Moreover, when using together the compound shown by t-butyl alcohol and Chemical formula (1), the mass ratio of the compound shown by t-butyl alcohol / chemical formula (1) is 20-95 / 80-5. preferable.
The composite metal cyanide complex catalyst comprises an organic ligand containing t-butyl alcohol or a mixture of t-butyl alcohol and another compound as a catalyst skeleton obtained by reacting zinc halide and alkali metal cyanocobaltate. It is produced by heating and stirring in a solution (ripening step), and then filtering, washing and drying by a known method.

In the present invention, the polymer (A) is preferably produced under the following conditions.
1-5000 ppm is preferable with respect to an active hydrogen containing compound, and, as for the usage-amount of a catalyst, 30-2000 ppm is more preferable.
As a method of supplying the alkylene oxide, a method of supplying a necessary amount of the alkylene oxide in several times or a method of continuously supplying the alkylene oxide is used. The reaction of the alkylene oxide may be started from a reduced pressure state or an atmospheric pressure state. When starting the reaction from atmospheric pressure, it is desirable to carry out in the presence of an inert gas such as nitrogen or helium.

A solvent may be used in the reaction of the alkylene oxide. Examples of the solvent include aliphatic hydrocarbons such as pentane, hexane and heptane, ethers such as tetrahydrofuran and dioxane, or aprotic polar solvents such as dimethyl sulfoxide and N, N-dimethylformamide.
The number average molecular weight of the produced polymer (A) is 5000 to 30000, and the total unsaturation is 0.02 meq / g or less. The number average molecular weight is preferably from 8000 to 25000, particularly preferably from 12000 to 22000. The total degree of unsaturation is particularly preferably 0.015 meq / g or less.

In order to convert the terminal hydroxyl group of the polymer (A) into an unsaturated group, there is a method in which the terminal hydroxyl group is converted to an alkali metal or alkaline earth metal alkoxide and then reacted with a compound having an unsaturated group. To convert to alkoxide, alkali metal or alkaline earth metal hydroxides, alkali metal hydrides, and alkali metal alkoxides can be used.
The amount of the alkali metal or alkaline earth metal compound used is preferably 0.8 to 1.5 mol, more preferably 0.9 to 1.4 mol, relative to 1 mol of the terminal hydroxyl group of the polymer (A). 0.95-1.3 mol is most preferred.
After the terminal hydroxyl group of the polymer (A) is converted into an alkoxide, it is reacted with an unsaturated group-containing compound to convert it into an oxyalkylene polymer having an unsaturated group at the terminal (hereinafter referred to as polymer (C)).
Unsaturated group-containing compound, Ru compound der of the formula (2).

_{^{CH 2 = C (R 2)}} -R 3 -X ... (2)
In formula (2), R ² is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, R ³ is a divalent hydrocarbon group, and X is a halogen atom.
The number of carbon atoms of R ³ is from 1 to 10 are preferred, and more preferably 1.
X includes a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom, and a chlorine atom and a bromine atom are preferable.
Specific examples of the compound represented by the formula (2) include allyl chloride, allyl bromide, methallyl chloride, methallyl bromide and the like. Allyl chloride, methallyl chloride, and allyl bromide are preferable, and allyl chloride is more preferable in terms of cost and reactivity. These may be used alone or in combination of two or more.

The amount of the unsaturated group-containing compound used is 0.8 to 1.9 mol , more preferably 0.85 to 1.7 mol , and 0.9 to 0.1 mol per mol of the terminal hydroxyl group of the polymer (A). Most preferred is 1.5 moles. When the amount is less than 0.8 mol, the unsaturated group content in the unsaturated group-terminated oxyalkylene polymer is lowered. On the other hand, when it exceeds 1.9 mol, the amount of the unreacted unsaturated group-containing compound increases.
When the alkoxide-terminated oxyalkylene polymer reacts with the unsaturated group-containing compound, the reaction temperature is preferably 20 to 160 ° C, more preferably 50 to 150 ° C, and most preferably 70 to 150 ° C. In order to prevent coloring of the product, the reaction is preferably performed in the presence of an inert gas such as nitrogen or helium. The reaction time is preferably 1 to 7 hours.
After introducing the unsaturated group, it is preferable to remove and purify the alkali metal or alkaline earth metal compound used in the reaction, the by-product inorganic salt, and the like by a known method.

Next, a compound (B) having a functional group (hereinafter referred to as an addition reactive group) that undergoes an addition reaction with an unsaturated group and a hydrolyzable silyl group (hereinafter referred to as a silyl group introducing agent (B)). To produce a hydrolyzable silyl group-containing oxyalkylene polymer.
The number of addition reactive groups in the silyl group introducing agent (B) is preferably 2 or less, and more preferably 1.
As the silyl group introducing agent (B), compounds having structures represented by the following formulas (3) and (4) can be used.

H-SiX _a R ⁴ _3-a (3)
However, R ⁴ in the formula (3) is a monovalent hydrocarbon group, X is a hydroxyl group or a hydrolyzable group of a substituted or unsubstituted 1 to 20 carbon atoms. When two or more X exist, X may be the same or different. a is 1, 2 or 3.

_{^{HS-R 5 -SiX a R 4}} 3-a ··· (4)
However, R < ⁵ > in Formula (4) is a C1-C20 bivalent hydrocarbon group, and R < ⁴ >, X, a is the same as the above.
R ⁴ is preferably an alkyl group having 8 or less carbon atoms, a phenyl group and a fluoroalkyl group. Specifically, a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, a cyclohexyl group, and a phenyl group are preferable.
Examples of X include a hydroxyl group, a halogen atom, an alkoxy group, an acyloxy group, an amide group, an amino group, an aminooxy group, a ketoximate group, a mercapto group, and an alkenyloxy group. A lower alkoxy group having 4 or less carbon atoms such as a methoxy group, an ethoxy group, and a propoxy group is preferable.
a is preferably 2 or 3.

Specific examples of the compound represented by the formula (3) include methyldimethoxysilane, trimethoxysilane, triethoxysilane, methyldiacetoxysilane, dimethylchlorosilane, methyldichlorosilane, ethyldichlorosilane, trichlorosilane and the like. These compounds may be used alone or in combination of two or more.
When the compound represented by the formula (3) is reacted with the terminal unsaturated group of the polymer (C), a catalyst such as a platinum catalyst, a rhodium catalyst, a cobalt catalyst, a palladium catalyst, or a nickel catalyst can be used. . Platinum-based catalysts such as chloroplatinic acid, platinum metal, platinum chloride, and platinum olefin complexes are preferred. 10-100 ppm is preferable with respect to a polymer (C), and, as for the addition amount of a catalyst, 30-60 ppm is more preferable. The reaction temperature is preferably 30 ° C to 150 ° C, and more preferably 60 ° C to 120 ° C. The reaction time is preferably several hours.

  Examples of the compound represented by the formula (4) include 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltrimethoxysilane, and 3-mercaptopropyltriethoxysilane.

  When the compound represented by the formula (4) is reacted with the terminal unsaturated group of the polymer (C), the reaction can be initiated by a radical generator, radiation or heat. Examples of the radical generator include peroxide-based, azo-based, or redox-based compounds and metal compound catalysts, such as 2,2′-azobisisobutyronitrile and 2,2′-azobis (2-methylbutyronitrile). ), Benzoyl peroxide, t-butyl peroxide, acetyl peroxide, diisopropyl perdioxycarbonate and the like. The amount of radical generator added is preferably 0.01 to 2 g, more preferably 0.1 to 0.8 g, based on 100 g of the polymer (C). The reaction temperature is preferably 20 to 200 ° C, more preferably 50 to 150 ° C. The reaction time is preferably several hours to several tens of hours.

  The ratio of the silyl group introducing agent (B) to be reacted with the polymer (C) can be arbitrarily changed. The total number of addition reactive groups in the silyl group introducing agent is preferably not more than the total number of unsaturated groups in the polymer (C). When the number of silyl groups is small, a cured product obtained by curing the hydrolyzable silyl group-containing oxyalkylene polymer becomes flexible. The proportion of the silyl group introducing agent can be arbitrarily selected according to the desired physical properties in consideration of the physical properties of the cured product.

The viscosity of the hydrolyzable silyl group-containing oxyalkylene polymer is preferably 30 Pa · s or less, more preferably 25 Pa · s or less, at 25 ° C. for reasons of handling in the production process. 5 Pa · s or more is preferable.
This invention is a manufacturing method of the curable composition which mix | blends a filler and a curing catalyst with the said hydrolysable silyl group containing oxyalkylene polymer. An additive can be further added to the curable composition. Below, a filler, a curing catalyst, and another additive are demonstrated.

(Filler)
A known filler can be used as the filler. Specific examples of the filler include calcium carbonate having a surface treated with a fatty acid or a resin acid-based organic substance, colloidal calcium carbonate having an average particle diameter of 1 μm or less obtained by further finely pulverizing the calcium carbonate, and an average particle diameter produced by a precipitation method. 1 to 3 μm light calcium carbonate, calcium carbonate such as heavy calcium carbonate having an average particle diameter of 1 to 20 μm, fumed silica, precipitated silica, anhydrous silicic acid, hydrous silicic acid and carbon black, magnesium carbonate, diatomaceous earth, calcined Clay, clay, talc, titanium oxide, bentonite, ferric oxide, zinc oxide, activated zinc white, shirasu balloon, glass balloon, saran balloon, polyacrylonitrile balloon and other organic resin balloons, wood powder, pulp, cotton chips, mica , Walnut flour, rice flour, graphite, fine aluminum powder Powdery fillers such as flint powder, glass fibers, glass filaments, carbon fibers, Kevlar fibers, and the like fibrous filler, such as polyethylene fibers. These fillers may be used alone or in combination of two or more.

The most common of these is calcium carbonate. In this case, it is preferable to use colloidal calcium carbonate and heavy calcium carbonate in combination. The mixing ratio of colloidal calcium carbonate and heavy calcium carbonate is preferably 10: 1 to 1:10, and more preferably 3: 1 to 1: 3.
The amount of the filler used is preferably 1 to 1000 parts by mass, more preferably 50 to 250 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group-containing oxyalkylene polymer.
(Curing catalyst)
In order to obtain a practically sufficient curing rate, a curing catalyst is used.
Examples of the curing catalyst include the following tin compounds.
Divalent tin compounds such as tin 2-ethylhexanoate, tin naphthenate and tin stearate;
Organotin carboxylates such as dialkyltin carboxylates and dialkoxytin monocarboxylates such as dibutyltin dilaurate, dibutyltin diacetate, dibutyltin monoacetate, dibutyltin malate, dialkyltin bisacetylacetonate, dialkyltin monoacetylacetonate monoalkoxide A tetravalent tin compound such as a tin chelate compound, a reaction product of a dialkyltin oxide and an ester compound, a reaction product of a dialkyltin oxide and an alkoxysilane compound, or a dialkyltin dialkyl sulfide.

Examples of tin chelate compounds include dibutyltin bisacetylacetonate, dibutyltin bisethylacetoacetate, dibutyltin bismonoacetylacetonate monoalkoxide, and the like.
In addition, examples of the reaction product of dialkyltin oxide and an ester compound include a tin compound in which dibutyltin oxide and a phthalate such as di-2-ethylhexyl phthalate and diisononyl phthalate are mixed by heating and reacted to form a liquid. . In this case, as the ester compound, tetraethyl silicate or a partially hydrolyzed condensate thereof can be used in addition to the aliphatic and aromatic carboxylic acid esters. A compound obtained by reacting or mixing these tin compounds with a low-molecular alkoxysilane or the like can also be used.

Moreover, the following are mentioned as a curing catalyst which can be used besides a tin compound.
Other metal salts such as bismuth organic carboxylic acid salts.
Acidic compounds such as phosphoric acid, p-toluenesulfonic acid, phthalic acid, and bis (2-ethylhexyl) phosphate.
Aliphatic monoamines such as butylamine, hexylamine, octylamine, decylamine, laurylamine, N, N-dimethyl-octylamine, aliphatic polyamine compounds such as ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, Amine compounds such as aromatic amine compounds, alkanolamines, aminosilane coupling agents such as 3- (2-aminoethyl) amino-propyltrimethoxysilane and 3-aminopropyltrimethoxysilane.

It is preferable to use a divalent tin compound in combination with an amine compound, particularly a primary amine compound, because the effect of accelerating curing is improved.
Further, by combining the above acidic compound and a basic compound such as an amine compound, a higher effect promoting effect is exhibited particularly at a high temperature.
The curing catalyst may be used alone or in combination of two or more. As for the usage-amount of a curing catalyst, 0.1-10 mass parts is preferable with respect to 100 mass parts of hydrolysable silyl group containing oxyalkylene polymers.

(Plasticizer)
A known plasticizer can be used as the plasticizer. Phthalates such as di-2-ethylhexyl phthalate, dibutyl phthalate, butyl benzyl phthalate, isononyl phthalate; aliphatic carboxylic acids such as dioctyl adipate, diisodecyl succinate, dibutyl sebacate, butyl oleate Esters; alcohol esters such as pentaerythritol ester; phosphate esters such as trioctyl phosphate and tricresyl phosphate; epoxidized soybean oil, 4,5-epoxycyclohexane-1,2-dicarboxylic acid di-2-ethylhexyl ester; Epoxy plasticizers such as epoxy benzyl stearate; Chlorinated paraffins; Polyester plasticizers such as polyesters obtained by reacting dibasic acids with dihydric alcohols; Polyoxypropylene glycol, Polyoxypropylene Polyols in which the hydroxyl group of polyoxypropylene glycol is sealed with an alkyl ether; polyethers in which the hydroxyl group of polyoxypropylene triol is sealed with an allyl compound; poly-α-methylstyrene And polystyrene oligomers such as polystyrene; polymer plasticizers such as oligomers such as polybutadiene, butadiene-acrylonitrile copolymer, polychloroprene, polyisoprene, polybutene, hydrogenated polybutene, and epoxidized polybutadiene. These plasticizers may be used alone or in combination of two or more.
The amount of the plasticizer used is preferably 0 to 100 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group-containing polyalkylene oxide polymer.

(Adhesiveness imparting agent)
Examples of the adhesion imparting agent include silane coupling agents such as (meth) acryloyloxy group-containing silanes, amino group-containing silanes, mercapto group-containing silanes, epoxy group-containing silanes, and carboxyl group-containing silanes.
Examples of (meth) acryloyloxy group-containing silanes include 3-methacryloyloxypropyltrimethoxysilane, 3-acryloyloxypropyltrimethoxysilane, and 3-methacryloyloxypropylmethyldimethoxysilane.

  Examples of amino group-containing silanes include 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N -(2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltriethoxysilane, 3-ureidopropyltriethoxysilane, N-[(N-vinylbenzyl) -2-aminoethyl] -3-aminopropyltrimethoxysilane, 3-anilinopropyltrimethoxysilane, and the like.

Examples of mercapto group-containing silanes include 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 3-mercaptopropylmethyldimethoxysilane, and 3-mercaptopropylmethyldiethoxysilane.
Examples of epoxy group-containing silanes include 3-glycidyloxypropyltrimethoxysilane, 3-glycidyloxypropylmethyldimethoxysilane, and 3-glycidyloxypropyltriethoxysilane.
Examples of carboxyl group-containing silanes include 2-carboxyethyltriethoxysilane, 2-carboxyethylphenylbis (2-methoxyethoxy) silane, N- (N-carboxymethyl-2-aminoethyl) -3-aminopropyltrimethoxy. Silane etc. are mentioned.
Moreover, you may use the reaction material obtained by making 2 or more types of silane coupling agents react. Examples of reactants include reactants of amino group-containing silanes and epoxy group-containing silanes, reactants of amino group-containing silanes and (meth) acryloyloxy group-containing silanes, epoxy group-containing silanes and mercapto groups Reaction products of silanes containing silanes, reaction products of silanes containing mercapto groups, and the like. These reactants can be easily obtained by mixing the silane coupling agent and stirring at room temperature to 150 ° C. The reaction time is not particularly limited, but usually 1 to 8 hours.

The above compounds may be used alone or in combination of two or more.
The amount of the silane coupling agent used is preferably 0 to 30 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group-containing oxyalkylene polymer.
Moreover, you may add an epoxy resin as an adhesive provision agent. Epoxy resins include flame retardant epoxy resins such as bisphenol A-diglycidyl ether type epoxy resins, bisphenol F-diglycidyl ether type epoxy resins, tetrabromobisphenol A-glycidyl ether type epoxy resins, novolak type epoxy resins, and hydrogenated products. Diglycidyl ester type epoxy resin such as bisphenol A type epoxy resin, glycidyl ether type epoxy resin of bisphenol A / propylene oxide adduct, glycidyl 4-glycidyloxybenzoate, diglycidyl phthalate, diglycidyl tetrahydrophthalate, diglycidyl hexahydrophthalate , M-aminophenol epoxy resin, diaminodiphenylmethane epoxy resin, urethane-modified epoxy resin, various alicyclic epoxy resins, N, N-jig Unsaturated polymer epoxy such as sidylaniline, N, N-diglycidyl-o-toluidine, triglycidyl isocyanurate, polyalkylene glycol diglycidyl ether, glycidyl ether of polyhydric alcohol such as glycerin, hydantoin type epoxy resin, petroleum resin Examples thereof include generally used epoxy resins such as chemical compounds and vinyl polymers containing epoxy groups. The amount of the epoxy resin used is preferably 0 to 100 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group-containing oxyalkylene polymer.

  Moreover, you may use together the hardening | curing agent (or hardening catalyst) of an epoxy resin. Specific examples of the curing agent for epoxy resin include, for example, triethylenetetramine, tetraethylenepentamine, diethylaminopropylamine, N-aminoethylpiperazine, m-xylylenediamine, m-phenylenediamine, diaminodiphenylmethane, diaminodiphenylsulfone, Amines or their salts such as isophoronediamine, 2,4,6-tris (dimethylaminomethyl) phenol, blocked amines such as ketimine compounds, polyamide resins, imidazoles, dicyandiamides, boron trifluoride complex compounds Carboxylic anhydrides such as phthalic anhydride, hexahydrophthalic anhydride, tetrahydrophthalic anhydride, dodecenyl succinic anhydride, pyromellitic anhydride, phenoxy resin, carboxylic acids, alcohol An oxyalkylene polymer having an average of at least one group capable of reacting with an epoxy group in the molecule (terminal aminated polyoxypropylene glycol, terminal carboxylated polyoxypropylene glycol, etc.), terminal is a hydroxyl group, carboxyl group And polybutadienes modified with amino groups, hydrogenated polybutadiene, acrylonitrile-butadiene copolymers, liquid terminal functional group-containing polymers such as acrylic polymers, and ketimine compounds. As for the usage-amount of the hardening | curing agent for epoxy resins, 0.1-300 mass parts is preferable with respect to 100 mass parts of epoxy resins.

(solvent)
A solvent may be added for the purpose of adjusting the viscosity and improving the storage stability of the composition.
Solvents include aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, alcohols, ketones, esters and ethers. Among these, alcohols are preferable because the storage stability when the curable composition of the present invention is stored for a long time is improved. As the alcohols, alkyl alcohols having 1 to 10 carbon atoms are preferable, and methanol, ethanol, isopropanol, isoamyl alcohol, and hexyl alcohol are particularly preferable. The amount of the solvent used is preferably 0 to 500 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group-containing oxyalkylene polymer.

(Dehydrating agent)
In order to further improve the storage stability of the curable composition, a small amount of a dehydrating agent can be added within a range that does not adversely affect the curability and flexibility.
Specific examples of the dehydrating agent include alkyl orthoformate such as methyl orthoformate and ethyl orthoformate, alkyl orthoacetate such as methyl orthoacetate and ethyl orthoacetate, methyltrimethoxysilane, vinyltrimethoxysilane, tetramethoxysilane, tetraethoxy. Examples include hydrolyzable organosilicon compounds such as silane, hydrolyzable organotitanium compounds, and the like. Vinyltrimethoxysilane and tetraethoxysilane are particularly preferable from the viewpoint of cost and effect. Such a dehydrating agent is particularly effective in a product in which a curing catalyst is added to a blend and filled in a moisture-proof container, which is known as a one-component blend.

(Thixotropic agent)
A thixotropic agent may be used to improve sagging properties. As the thixotropic agent, organic acid-treated calcium carbonate, hydrogenated castor oil, calcium stearate, zinc stearate, fine powder silica, fatty acid amide and the like are used. 0.1-10 mass parts is preferable with respect to 100 mass parts of hydrolyzable silyl group containing oxyalkylene polymers, and, as for the usage-amount of a thixotropy imparting agent, 2-6 mass parts is more preferable.

(Anti-aging agent)
As the anti-aging agent, generally used antioxidants, ultraviolet absorbers, and light stabilizers are appropriately used. Hindered amine, benzotriazole, benzophenone, benzoate, cyanoacrylate, acrylate, hindered phenol, phosphorus, and sulfur compounds can be used as appropriate. It is preferable to use a light stabilizer, an antioxidant, and an ultraviolet absorber in combination. It is particularly effective to combine two or more selected from the group consisting of tertiary and secondary hindered amine light stabilizers, benzotriazole ultraviolet absorbers, hindered phenols and phosphite antioxidants. As for the usage-amount of antioxidant, a ultraviolet absorber, and a light stabilizer, 0.1-10 mass parts is preferable with respect to 100 mass parts of hydrolysable silyl group containing oxyalkylene polymers, respectively. If the amount is less than 0.1 parts by mass, the effect of improving the weather resistance is small.

(Other)
For the purpose of improving the adhesion and surface tack of the paint over a long period of time, an air oxidation curable compound or a photocurable compound may be added.
Air oxidative curable compounds include drying oils such as tung oil and linseed oil, various alkyd resins obtained by modifying the compounds, acrylic polymers modified with drying oil, silicone resins, polybutadiene, carbon number Examples include diene polymers such as 5-8 diene polymers and copolymers, and various modified products of the polymers and copolymers (maleinization modification, boil oil modification, and the like). As the photocurable compound, a compound containing a (meth) acryloyl group obtained by reacting a polyhydric alcohol such as trimethylolpropane, a hydroxy compound such as polyether polyol or polyester polyol, and acrylic acid or methacrylic acid can be used. .

A typical example is trimethylolpropane triacrylate. An air oxidation curable compound and a photocurable compound may be used in combination.
The air oxidation curable compound is preferably 0 to 50 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group-containing oxyalkylene polymer, and the photocurable compound is based on 100 parts by mass of the hydrolyzable silyl group-containing oxyalkylene polymer. 0 to 50 parts by mass is preferable.

In addition, a compound capable of generating trimethylsilanol by hydrolysis may be added to adjust physical properties and reduce surface stickiness. This compound has an effect of reducing the modulus of a cured product when a divalent tin compound and a primary amine compound are used as a curing catalyst, and reducing surface stickiness. As a compound that generates trimethylsilanol, trimethylsilyl ethers such as aliphatic alcohols and phenols can be generally used, and the stronger the acidity of the alcohol, the more effective the slowing of curing. Curability can be adjusted by arbitrarily changing the type of alcohol, and trimethylsilyl ethers of a plurality of alcohols can be used simultaneously for that purpose. Silazanes such as hexamethyldisilazane can also be used.
The amount of the compound that generates trimethylsilanol by hydrolysis is preferably 0 to 50 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group-containing oxyalkylene polymer.
In addition, inorganic pigments such as iron oxide, chromium oxide, and titanium oxide, and organic pigments such as phthalocyanine blue and phthalocyanine green can be used as the pigment. The use of the pigment is effective not only for coloring but also for the purpose of improving the weather resistance.

In addition, for the purpose of giving a design property as a sealing material, by adding a micro-particle of a color different from the color of the composition to the composition, it is hardened with a surface appearance like granite or granite. It can also be a thing.
It is also optional to add a known flame retardant or fungicide.
It is also possible to add a matting agent used for paint applications.
The curable composition in this invention can be obtained by mix | blending a hydrolyzable silyl group containing oxyalkylene polymer, a filler, and a curing catalyst, and also mix | blending an additive arbitrarily as needed.
Furthermore, the curable composition in the present invention may further contain a polymer having a main chain of polyester, polycarbonate, polyacrylate, and polyolefin and containing one or more unsaturated groups in the molecule.

When the main chain contains a polymer of polyester or polycarbonate, the adhesion to the substrate is improved. When the main chain contains a polymer of polyacrylate, adhesion to the substrate and weather resistance are improved. When the main chain contains a polyolefin polymer, the water resistance is improved. It is also possible to combine a plurality of these.
The curable composition in the present invention can be cured by moisture. The curing temperature is preferably in the range of 0 to 35 ° C, more preferably 20 to 25 ° C.
The curable composition in the present invention can be used for a sealing material, a waterproofing material, an adhesive, a coating agent, etc., and particularly for applications where sufficient cohesion of the cured product itself and dynamic followability to an adherend are required. Is preferred.

Although this invention is demonstrated based on an Example (Examples 1-3, Examples 7-8) and a comparative example (Examples 4-6) below, this invention is not limited to these.
The number average molecular weight of the hydroxyl group-containing oxyalkylene polymer is a hydroxyl group equivalent molecular weight calculated from the product of the molecular weight per hydroxyl group calculated from the hydroxyl group and the active hydrogen number of the initiator. The hydroxyl value was determined by the method described in JIS K1557.
The molecular weight distribution (Mw / Mn) was a polystyrene equivalent value measured by gel permeation chromatography using tetrahydrofuran as a solvent.
The total degree of unsaturation (USV) was determined by the method described in JIS K1557.
The viscosity of the polymer was measured at 25 ° C. by the method described in JIS K1557.

<Production of double metal cyanide complex catalyst>
In Production Examples 1 to 3, an aqueous zinc chloride solution in which 10 g of zinc chloride was dissolved in 15 mL of water was used, and an aqueous potassium hexacyanocobaltate solution in which 4 g of potassium hexacyanocobaltate was dissolved in 80 mL of water was used.
(Production Example 1)
A potassium hexacyanocobaltate aqueous solution was added dropwise to the zinc chloride aqueous solution at 40 ° C. over 30 minutes. After the dropwise addition, 8 mL of ethylene glycol mono-t-butyl ether (hereinafter referred to as ETB), 72 mL of t-butyl alcohol (hereinafter referred to as TBA) and 80 mL of water were added, and the mixture was stirred and aged at 60 ° C. for 1 hour. After aging, the complex was filtered off.
To the resulting complex, 4 mL of ETB, 36 mL of TBA and 80 mL of water were added, stirred for 30 minutes, washed and filtered. Further, 10 mL of ETB and 90 mL of TBA were added and stirred for 30 minutes, and then polyoxypropylene triol having a molecular weight of 1000 was added and stirred for 30 minutes. Thereafter, the solvent was removed at 120 ° C. to obtain a 7 wt% composite metal cyanide complex catalyst (catalyst A) dispersion dispersed in polyol.

(Production Example 2)
A potassium hexacyanocobaltate aqueous solution was added dropwise to the zinc chloride aqueous solution at 40 ° C. over 30 minutes. After completion of the addition, 24 mL of ETB, 56 mL of TBA, and 80 mL of water were added, and the temperature was raised to 60 ° C. After stirring for 1 hour, the complex was filtered off.
To the obtained complex, 12 mL of ETB, 28 mL of TBA and 80 mL of water were added and stirred for 30 minutes, followed by filtration. Further, 30 mL of ETB and 70 mL of TBA were added and stirred for 30 minutes and then filtered. After drying under reduced pressure at 50 ° C. until the weight became constant, pulverization was performed to obtain a double metal cyanide complex catalyst (catalyst B).

(Production Example 3)
A potassium hexacyanocobaltate aqueous solution was dropped into the zinc chloride aqueous solution at 40 ° C. over 30 minutes. After completion of the dropwise addition, 80 mL of glyme and 80 mL of water were added, and after stirring at 60 ° C. for 1 hour, the complex was separated by filtration.
To the resulting complex, 80 mL of glyme and 80 mL of water were added and stirred for 30 minutes, followed by filtration. Further, 100 mL of glyme and 10 mL of water were added and stirred, followed by filtration. After drying at 80 ° C. for 4 hours and pulverizing, a double metal cyanide complex catalyst (catalyst C) was obtained.

<Synthesis of oxyalkylene polymer>
(Example 1)
1120 g of a polyoxypropylene triol (hereinafter referred to as triol A) having a number average molecular weight of 3000 obtained by reacting glycerin with propylene oxide (hereinafter referred to as PO) was used as an initiator, and a catalyst A dispersion (concentration 7% by mass) In the presence of 22.8 g, 6880 g of PO was reacted to obtain a polyoxypropylene triol having a number average molecular weight of 20000, Mw / Mn = 1.28, USV = 0.111 meq / g, and a viscosity of 23 Pa · s.
1000 g of this polyoxypropylene triol was put in a pressure vessel, and a 28% methanol solution of sodium methoxide was added so that the sodium was 1.05 times mol per mol of hydroxyl group, and stirred at 120 ° C. for 30 minutes. After stirring, a methanol removal reaction was performed under reduced pressure, and then 13 g of allyl chloride was added and reacted for 1 hour. Unreacted volatile components were distilled off under reduced pressure, and by-product inorganic salts were removed and purified to obtain terminal allyloxylated polyoxypropylene polymers. From the quantification of unsaturated groups, 95% of the hydroxyl groups were converted to allyloxy groups.
To 500 g of the obtained terminal allyloxylated polyoxypropylene polymer, 50 μL of a xylene solution of divinyltetramethylsiloxane platinum complex (containing 3% by mass of platinum) is added and stirred uniformly, and then 7.5 g of methyldimethoxysilane is added. And a reaction was carried out at 70 ° C. for 5 hours to obtain a terminal methyldimethoxysilyl group-containing polyoxypropylene polymer (P-1) having a pale yellow color and a viscosity of 24 Pa · s.

(Example 2)
Existence of 22.8 g of catalyst A dispersion (concentration: 7% by mass) using 970 g of polyoxypropylene diol (hereinafter referred to as diol B) having a number average molecular weight of about 2000 obtained by reacting PO with dipropylene glycol. Then, 7030 g of PO was reacted to obtain a polyoxypropylene diol having a number average molecular weight of 16000, Mw / Mn = 1.17, USV = 0.0009 meq / g, and a viscosity of 15.7 Pa · s.
An allyl-terminated polyoxypropylene polymer was obtained in the same manner as in Example 1 except that 1000 g of this polyoxypropylenediol diol was placed in a pressure resistant reactor and 10.5 g of allyl chloride was added. From the quantification of unsaturated groups, 95% of the hydroxyl groups were converted to allyloxy groups. In the same manner as in Example 1 except that 5.6 g of methyldimethoxysilane was added to 500 g of the allyl-terminated polyoxypropylene polymer, a terminal methyldimethoxysilyl group-containing polyoxypropylene heavy polymer having a pale yellow color and a viscosity of 16.5 Pa · s was used. A union (P-2) was obtained.

(Example 3)
1015 g of polyoxypropylene triol (hereinafter referred to as triol C) having a number average molecular weight of about 2000 obtained by reacting PO with glycerin was used as an initiator, and 6985 g of PO was reacted in the presence of 1.6 g of catalyst B. Thus, a polyoxypropylene triol having a number average molecular weight of 15000, Mw / Mn = 1.17, USV = 0.0009 meq / g, and a viscosity of 14.6 Pa · s was obtained.
An allyl-terminated polyoxypropylene polymer was obtained in the same manner as in Example 1 except that 1000 g of this polyoxypropylene triol was placed in a pressure resistant reactor and 17 g of allyl chloride was added. From the quantification of unsaturated groups, 95% of the hydroxyl groups were converted to allyloxy groups. In the same manner as in Example 1 except that 7.8 g of methyldimethoxysilane was added to 500 g of the allyl-terminated polyoxypropylene polymer, a terminal methyldimethoxysilyl group-containing polyoxypropylene heavy polymer having a pale yellow color and a viscosity of 15.5 Pa · s was used. A union (P-3) was obtained.

(Example 4)
Using 863 g of triol A as an initiator and 7137 g of PO in the presence of 1.6 g of catalyst C, PO was reacted to give a number average molecular weight of 20,000, Mw / Mn = 1.37, USV = 0.032 meq / g, and a viscosity of 19. 3 Pa · s polyoxypropylene triol was obtained.
1000 g of this polyoxypropylene triol was reacted in the same manner as in Example 1 to obtain a terminal allylated polyether. From the determination of unsaturated groups, 95% of the hydroxyl groups were converted to allyl ether. The obtained allyl-terminated polyoxypropylene polymer was reacted in the same manner as in Example 1 to obtain a terminal methyldimethoxysilyl group-containing polyoxypropylene polymer (C-1) having a pale yellow color and a viscosity of 22 Pa · s.

(Example 5)
840 g of Diol B was used as an initiator, and 7160 g of PO was reacted in the presence of 1.6 g of Catalyst C to obtain a number average molecular weight of 16000, Mw / Mn = 1.25, USV = 0.035 meq / g, viscosity of 13. 8 Pa · s of polyoxypropylene diol was obtained.
This polyoxypropylene diol was reacted in the same manner as in Example 2 to obtain an allyl-terminated polyoxypropylene polymer. From the quantification of unsaturated groups, 95% of the hydroxyl groups were converted to allyloxy groups. The obtained allyl-terminated polyoxypropylene polymer was reacted in the same manner as in Example 2 to produce a pale yellow, terminal methyldimethoxysilyl group-containing polyoxypropylene polymer (C-2) having a viscosity of 14.5 Pa · s. Obtained.

(Example 6)
833 g of triol C was used as an initiator, and 7167 g of PO was reacted in the presence of 1.6 g of catalyst C to obtain a number average molecular weight of 15000, Mw / Mn = 1.30, USV = 0.070 meq / g, viscosity of 12 .6 Pa · s polyoxypropylene triol was obtained.
This polyoxypropylene triol was reacted in the same manner as in Example 3 to obtain an allyl-terminated polyoxypropylene polymer. From the quantification of unsaturated groups, 95% of the hydroxyl groups were converted to allyloxy groups. The obtained allyl-terminated polyoxypropylene polymer was reacted in the same manner as in Example 3 to produce a pale yellow, terminal methyldimethoxysilyl group-containing polyoxypropylene polymer (C-3) having a viscosity of 13.5 Pa · s. Obtained.
In Examples 1 to 6, the catalyst used for the production of the hydroxyl-terminated polymer, the number-average molecular weight of the hydroxyl-terminated polymer, the USV (unit: meq / g) of the hydroxyl-terminated polymer, and the finally obtained polymer Table 1 shows the name of the polymer and Mw / Mn of the polymer.

(Physical properties and curability test)
The following test was done about polymer P-1 to P-3 and C-1 to C-3.

(1) Physical property test 0.5 g of dibutyltin bisacetylacetonate was added to 100 g of each polymer, kneaded well, defoamed under reduced pressure, poured into a mold, and subjected to conditions of 50 ° C. and 65% humidity. Let stand for one week to cure, make a punched specimen in dumbbell shape No. 3 described in JIS K6301 (vulcanized rubber physical test method), measure physical properties by tensile test, 50% tensile modulus and fracture The time elongation was measured. The results are shown in Table 2.
(2) Curability test To 20 g of each polymer, 20 g of di-2-ethylhexyl phthalate was added and mixed, 0.2 g of water and 0.2 g of dibutyltin bisacetylacetonate were added and stirred uniformly, While measuring the viscosity change with a viscometer, the curing behavior was observed and the gelation time was measured. The results are shown in Table 2.

The hydrolyzable silyl group-containing polymer as in the present invention has a higher rate of curing under the same conditions as the number of terminal functional groups, that is, the higher the elastic modulus of the cured product. It is necessary to compare them. Therefore, when comparing the curing rates of the polymers P-1 and C-1, P-2 and C-2, and P-3 and C-3, as shown in Table 2, the polymer of the present invention is conventional. It turns out that it has the characteristic that a cure rate is quick compared with a well-known polymer.
(Formulation example)
A filler and other commonly known additives were added to the polymer of the present invention and kneaded to produce a curable composition.
The main raw materials used are as follows.

Colloidal calcium carbonate: Takehara Chemical Industry Co., Ltd., trade name Neolite SP-T,
Heavy calcium carbonate: Shiraishi Calcium Industry Co., Ltd., trade name Whiteon SB,
Fatty acid amide thixotropic agent: Enomoto Kasei Co., Ltd., trade name Disparon 6500,
Benzotriazole-based UV absorber: Ciba Specialty Chemicals Co., Ltd., trade name: Tinuvin 327
Hindered amine light stabilizer: Asahi Denka Kogyo Co., Ltd., trade name LA-63P,
Hindered phenolic antioxidants: Ouchi Shinsei Chemical Co., Ltd., trade name NOCRACK NS-6,
Epoxy plasticizer: 4,5-epoxycyclohexane-1,2-dicarboxylic acid di-2-ethylhexyl ester, manufactured by Shin Nippon Rika Co., Ltd., trade name Sansosizer EPS,
Hydrogenated castor oil-based thixotropic agent: manufactured by Enomoto Kasei Co., Ltd., trade name Disparon 305,
Photo-curable compound: Polyester polyol polyacrylate, manufactured by Toagosei Co., Ltd., trade name Aronics M8060,
Acrylonitrile resin hollow body: Matsumoto Yushi Seiyaku Co., Ltd., trade name Matsumoto Microsphere F-80GCA,

(Example 7)
100 g of polymer P-1, 100 g of colloidal calcium carbonate, 30 g of heavy calcium carbonate, 5 g of titanium oxide, 30 g of polyoxypropylene triol (molecular weight 8000), fatty acid amide thixotropic agent, 3- (2-aminoethylamino) 1 g of propyltrimethoxysilane, 1 g of 3-glycidyloxypropyltrimethoxysilane, 1 g of benzotriazole UV absorber, 1 g of hindered amine light stabilizer, 1 g of hindered phenol antioxidant, 0.5 g of tetraethyl silicate, vinyltrimethoxysilane Knead 0.5 g, add 2 g of dibutyltin bisacetylacetonate, and mix evenly to obtain a moisture curable composition. Immediately fill the joints between the ceramic siding boards on the outer wall of the house. And leave it open to the atmosphere. B) Hardened to become an elastic body.

(Example 8)
90 g of polymer P-1, 10 g of polymer P-2, 5 g of tung oil, 1 g of trimethylolpropane tristrimethylsilyl ether, 0.3 g of phenyltrimethoxysilane, 75 g of colloidal calcium carbonate, 75 g of heavy calcium carbonate, 5 g of titanium oxide, 25 g of di-2-ethylhexyl phthalate, 25 g of epoxy plasticizer, 3 g of tinuvin 305, 5 g of polyfunctional acrylic ester compound, 1 g of benzotriazole UV absorber, 1 g of hindered amine light stabilizer, hindered phenol antioxidant 1 g, acrylonitrile-based resin hollow bodies 2 and 5 g were kneaded, and a mixture of 2 parts of 2-ethylhexanoic acid tin and laurylamine 0 and 5 g was added and kneaded to obtain a curable composition. Immediately after this curable composition was filled in the joint between the concrete plates on the outer wall of the building and allowed to stand, a flexible elastic body was obtained.

Claims (5)

Ring opening of alkylene oxide, which is a complex metal cyanide complex catalyst in which an organic ligand comprising t-butyl alcohol or t-butyl alcohol and a compound represented by the following chemical formula (1) is coordinated to an initiator and zinc hexacyanocobaltate complex After reacting alkylene oxide in the presence of a polymerization catalyst to obtain a hydroxyl group-terminated oxyalkylene polymer (polymer (A)) having a number average molecular weight of 5000 to 30000 and a total unsaturation of 0.02 meq / g or less, After the terminal hydroxyl group of the polymer (A) is converted to an alkoxide, 0.8 to 1.9 mol of the unsaturated group represented by the formula (2) is contained per 1 mol of the terminal hydroxyl group of the polymer (A). Reacting with a compound to convert to an unsaturated group, and further reacting a compound (B) having a hydrolyzable silyl group and a functional group that undergoes an addition reaction with the unsaturated group The symptoms, obtained by the method for producing a hydrolyzable silyl group-containing oxyalkylene polymer, is represented by the polymer via a terminal ether bond of the oxyalkylene polymer (A) Formula (2) not A hydrolyzable silyl group-containing oxyalkylene polymer to which a —R ³ —C (R ² ) (—) — CH ₂ — group derived from a saturated group-containing compound is bonded and has a hydrolyzable silyl group at the terminal .
R ¹ —C (CH ₃ ) ₂ (OR ⁰ ) _n OH (1)
In the formula (1), R ¹ is a methyl group or an ethyl group, R ⁰ is an ethylene group or a group in which a hydrogen atom of the ethylene group is substituted with a methyl group or an ethyl group, and n is an integer of 1 to 3. .
_{^{CH 2 = C (R 2)}} -R 3 -X ··· (2)
In formula (2), R ² is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, R ³ is a divalent hydrocarbon group, and X is a halogen atom.   The hydrolyzable silyl according to claim 1, wherein the alkylene oxide ring-opening polymerization catalyst is a double metal cyanide complex catalyst in which t-butyl alcohol and ethylene glycol mono-t-butyl ether are coordinated as organic ligands. Group-containing oxyalkylene polymer.   A room temperature curable composition comprising the hydrolyzable silyl group-containing oxyalkylene polymer according to claim 1, a filler and a curing catalyst.   The room temperature curable composition according to claim 3, wherein the room temperature curable composition is a curable composition for sealing.   A sealing agent containing the curable composition for sealing according to claim 4.