JPH0477551A - Room temperature-curable composition - Google Patents

Abstract

PURPOSE:To provide the title composition excellent in storage stability, adherability etc., useful for sealants, comprising a specific polymer blocked with hydrolyzable silyl group, inorganic filler, curing catalyst and specific storage stability improver. CONSTITUTION:The objective composition comprising (A) 100pts.wt. of a reaction product of A1: a polyether of formula I (R<1> and R<2> are each divalent hydrocarbon group; (m) is 10 - 500), A2: a heterocyclic compound having two imino groups bound to different C atoms and/or an aromatic or heterocyclic compound with two mercapto groups bound to the C atoms constituting the ring, and A3: an organosilicon compound containing both epoxy and hydrolyzable groups, (B) 3 - 300pts.wt. of an inorganic filler, (C) 0.001 - 20pts.wt. of a curing catalyst, and (D) 0.1 - 100pts.wt. of a storage stability improver consisting of a compound of e.g. formula II (R<3> is monovalent hydrocarbon group, etc.; R<4> is divalent hydrocarbon group).

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a room temperature curable composition, particularly a room temperature curable composition useful as a sealant in the architectural field, which does not contaminate the surroundings of the sealant and has good storage stability. Regarding the composition.

[Technical background of the invention and its problems]

Compositions made from polyethers containing mercapto residues, amino groups, or hydroxyl groups in the molecule and terminally closed with hydrolyzable silyl groups cure at room temperature and are rubbers with high elongation and excellent adhesive properties. It is known that it becomes a shaped elastic body (
JP-A-6383160, JP-A-63-12556
Publication No. 6).

Furthermore, this cured product has excellent properties in that it causes little contamination of joints and their surrounding areas and does not stain the top coat. However, the use of raw materials containing mercapto residues, amino groups, or hydroxyl groups in the molecule,
Improvement has been desired in that storage stability is inferior to compositions using raw materials that do not have it.

[Purpose of the invention]

The present inventor has discovered that a polyether containing a mercapto residue, an amine group, or a hydroxyl group in the molecule and whose terminal end is closed with a hydrolyzable silyl group is used as a main raw material, and has a low contamination property on the construction area and a top coat. As a result of various studies on methods for improving the storage stability of sealant compositions that do not cause any damage, the present invention has been completed.

C Constituent of the present invention That is, the present invention has the following general formula: (A) (A) General formula; % formula %)
Shows the number 500. ) A polyether whose molecular chain end is blocked with an epoxy group; (b) (i) a heterocyclic compound having two imino groups bonded to two different carbon atoms in the molecule; and/or ( ii) Reacting an aromatic compound or a heterocyclic compound in which two mercapto groups are bonded to a carbon atom constituting an aromatic or heterocyclic ring, and (c) an organosilicon compound having an epoxy group and a hydrolyzable group. (8) Inorganic filler, (^) 3 to 100 parts by weight of a polymer whose molecular chain ends are blocked with hydrolyzable silyl groups obtained by
300 parts by weight, (C) curing catalyst, (A) 0.00 per 100 parts by weight
1 to 20 parts by weight, (D) (d) General formula; % formula % (wherein, R3 is a monovalent hydrocarbon group or one or two methylene groups constituting the main chain of the monovalent hydrocarbon group) R
4 represents a divalent hydrocarbon group), or (e) a compound represented by the general formula; (wherein, R5 constitutes a divalent hydrocarbon group and/or the main chain of the divalent hydrocarbon group); One or two methylene groups
A non-hydrolyzable divalent hydrocarbon group having a structure in which one or more atoms are substituted with oxygen, nitrogen and sulfur atoms or atomic groups, R6 is a hydrogen atom or a monovalent hydrocarbon group, R7 is a divalent hydrocarbon group A compound represented by (A)1
The present invention relates to a room temperature curable composition characterized in that the composition contains 0.1 to 100 parts by weight based on 0.00 parts by weight.

Component (A) used in the present invention is a polymer whose molecular chain terminals are blocked with hydrolyzable silyl groups, and has the following general formula: % formula %) (wherein R' and R' are 2 valence hydrocarbon group, m is 10-
Shows the number 500. ) Polyether whose molecular chain terminals are blocked with epoxy groups, (b) (i) different 2
and/or (ii) an aromatic compound having two mercapto groups bonded to carbon atoms constituting an aromatic ring or heterocycle; It is a polymer obtained by reacting a heterocyclic compound and (c) an organosilicon compound having an epoxy group and a hydrolyzable group.

The polyether (a) whose molecular chain ends are blocked with epoxy groups is an essential component in order to obtain the long-lasting pollution prevention effect that is a feature of the present invention, and has the general formula: % formula % (wherein, R', R'' are divalent hydrocarbon groups, m is 10-
Shows the number 500. ).

In the above polyether, the oxyalkylene unit represented by R10 is preferably an oxyethylene unit, an oxypropylene unit, or a combination of an oxyethylene unit and an oxypropylene unit because of its high stain prevention effect. The degree of polymerization m of the oxyalkylene unit is selected from the range of 10 to 500. When m is smaller than 10, it becomes difficult to obtain a rubber-like cured product with sufficient elongation.

On the other hand, if m is larger than 500, the durability of the antifouling effect, which is a feature of the present invention, decreases.

Examples of the divalent hydrocarbon group for R2 include a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, a phenylene group, a cyclohexylene group, and the following because they are easy to synthesize and obtain. In other words, it will happen. Among these groups, a methylene group is preferred from the viewpoint of easy availability of raw materials.

Typical examples of these components (a) include those obtained by condensing epichlorohydrin with polyoxyethylene or polyoxypropylene, both ends of which are blocked with hydroxyl groups, in the presence of a basic catalyst or the like.

(b) The compound (i) is a heterocyclic compound having an imino group that reacts with the epoxy group of (a) or (c), and has two imino groups bonded to two different carbon atoms in the molecule. It needs to be a heterocyclic compound having These include (b) (i) 1,3-di(4-piperidyl)propane and the like. Among these, piperazine is particularly recommended because of its ease of raw material availability.

(b) The compound (ii) is also a compound having two mercapto groups in the molecule that react with the epoxy groups of (a) and ()X). In order to obtain a sustained pollution prevention effect, which is a feature of the present invention, (b) and (ii) must be an aromatic compound or a heterocyclic compound, and the mercapto group must be present in the aromatic ring. Alternatively, it must be bonded to a carbon atom constituting a heterocycle. These (b)
As component (ii), 2,5-dimercap)-1,3,4-thiadiazole, dimercap)-1,3,4-thiadiazole, dimercap)-1,3,4-thiadiazole, Mercaptobenzene, dimercaptotoluene, dimercaptoxylene, dimercaptonaphthalene, etc. are recommended. Among these, 2,5-dimercapto-1,3,4-thiadiazole is particularly preferred for the above reasons. (b) (1) and (b) (11) may be used alone or in combination.

The organosilicon compound (c) has an epoxy group that reacts with the imino group (b) (1) or the mercapto group (b) (ii), and further has a hydrolyzable group bonded to a silicon atom. be.

These (iii) components are preferably of the general formula; A non-hydrolyzable divalent hydrocarbon group consisting of a structure in which one or more atoms are substituted with oxygen, nitrogen and sulfur atoms or atomic groups, Rg is a monovalent hydrocarbon group, Y
represents a hydrolyzable group bonded to a silicon atom, and a represents a number from 1 to 3. ) can be mentioned.

R8 is the same divalent hydrocarbon group as R2 and a part of the main chain methylene group of the divalent hydrocarbon group is 0. N
, a divalent hydrocarbon group substituted with an S atom or atomic group,
For example, the following general formula % formula % ((wherein, R13 is the same divalent hydrocarbon group as R2, Z is an atom or atomic group consisting of 0.N, S, and q is 1 to 1
(indicating a natural number 0).

The monovalent hydrocarbon group for R3 is selected from alkyl groups, alkenyl groups, aryl groups, aralkyl groups, etc., but from the viewpoint of ease of synthesis and raw material availability, for example, methyl groups, ethyl groups, propyl groups, butyl groups, Examples include pentyl group, hexyl group, cyclohexyl group, vinyl group, allyl group, phenyl group, and β-phenylethyl group. Among these, methyl group is particularly preferred from the viewpoint of raw material availability.

Hydrolyzable groups bonded to the silicon atom of Y include alkoxy groups, alkoxyalkoxy groups, acyloxy groups, N
, N-dialkylamino group, N-alkylamide group, N,
Examples include N-dialkylaminoxy group, ketoxime group, alkenoxy group, etc., but methoxy group, nidoxy group, propoxy group, Alkoxy groups having 1 to 6 carbon atoms, such as isopropoxy and hexyloxy groups, and 2-methoxyethoxy groups are suitable.

Among these, methoxy groups and ethoxy groups with high hydrolyzability (curing reactivity of the composition) are preferred, and methoxy groups are particularly preferred. The number a of hydrolyzable groups is selected within the range of 1 to 3, but in order to obtain a rubber-like cured product with a high elongation rate, it is preferable that a is 2.

Among the components (c) represented by the above general formula, the following general formula R93-a (wherein R9 is the same as above, R11 and 1li12 are divalent hydrocarbon groups, An organosilicon compound represented by R10 is an alkyl group having 1 to 6 carbon atoms, and a is the same as above is particularly preferred.

Examples of R11 and R12 include those similar to R2 and R8, but R11 is preferably a methylene group from the viewpoint of ease of raw material acquisition, and l112 is preferably an ethylene group, trimethylene group, or trimethylene group from the viewpoint of ease of synthesis and raw material availability. Tetramethylene groups, especially trimethylene groups, are preferred. R100
The groups, ie, the alkoxy group and a, are as described above.

Thus, specific examples of component (iii) include β-glycidoxyethyltrimethoxysilane, T-glycidoxyprobyltrimethoxysilane, δ-glycidoxybutyltrimethoxysilane, β-glycidoxy Ethyltriethoxysilane, T-glycidoxypropyltriethoxysilane, δ-glycidoxybutyltriethoxysilane, methyl (β-glycidoxyethyl) dimethoxysilane, methyl (T-glycidoxypropyl) dimethoxysilane,
Methyl(δ-crisitoxybutyl)dimethoxysilane,
Methyl (β-glycidoxyethyl) jetoxysilane,
Methyl (T-glycidoxypropyl) jetoxysilane, methyl (δ-glycidoxybutyl) jetoxysilane, phenyl (β-glycidoxyethyl) dimethoxysilane, phenyl (T-glycidoxypropyl) dimethoxysilane, Phenyl (δ-glycidoxybutyl) dimethoxysilane, dimethyl (β-glycidoxyethyl) methoxysilane, dimethyl (T-glycidoxypropyl) methoxysilane, dimethyl (δ-glycidoxybutyl) methoxysilane, β- (3,4-epoxycyclohexyl)
Ethyltrimethoxysilane and triethoxysilane, methyl-β-(3,4-epoxycyclohexyl)ethyldimethoxysilane, phenyl-β-(3,4-epoxycyclohexyl)ethyldimethoxysilane and dimethyl-β-(3,4- Examples include epoxycyclohexyl)ethylmethoxysilane.

Component (A) of the present invention is a combination of the epoxy group of components (a) and (c) described above, the imino group of component (b) (1), and/or the mercapto group of component (b) (ii). It is obtained by reaction.

(i) and/or (ii) of (a), (c) and (b)
) The reaction of the components is carried out at a temperature higher than the ambient temperature, e.g.
It is preferable to carry out under the condition of 50°C. In this case, compounds such as methanol, ethanol, phenol, salicylic acid, tris(dimethylaminomethyl)phenol, benzylmethylamine, tributylamine and 2-methylimidazole are preferably used as reaction accelerators. Methanol is one of the most preferred. In addition,
Although it is not necessary to use a solvent when carrying out this reaction, a hydrocarbon-based, ether-based, or ester-based solvent may be used.

The amounts of components (a), (b), and (c) are theoretically determined by the molar ratio (a) = (b): (c) p: (p+
1):2 (in the formula, p represents a natural number starting from 1). However, in reality, components (b) and (c) are (
b) It may be used in an amount slightly higher than the theoretical amount for each component.

As for the reaction procedure, components (a), (b), and (c) may be added and reacted at the same time, but first add (a).
After reacting in advance component (b) in an amount exceeding the equivalent amount and in an amount suitable for obtaining a polyether having the above molecular weight range to extend the chain, the necessary amount or slightly exceeding the amount of ( It is preferable to add the component c) and react because it is easier to control the degree of polymerization and it is possible to reliably introduce a hydrolyzable group to the end of the molecular chain.

These (A) components include (a), (b), those obtained from (1) and (c), and (a).

(b) Either one of those obtained from (ii) and (c) may be used, or both may be used in combination.

The molecular weight of the polymer of component (A) is 1.000 to 50.00.
It is preferable to select a value within the range of 0 from the viewpoint of the elongation rate and workability of the elastic body obtained by curing.

Component (B) of the present invention is a ladle component that imparts appropriate non-flowability and reinforcing properties to the composition of the present invention. These (B
) Components include fumed silica, precipitated silica, ground quartz, diatomaceous earth, calcium carbonate, titanium oxide, alumina, aluminum hydroxide, iron oxide, talc, clay, and carbon black. Note that these inorganic fillers may be used even after surface treatment with fatty acids or organosilicon compounds such as trimethylchlorosilane, hexamethyldisilazane, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, and silicone oil.

The amount of component (B) used is 3 to 300 parts by weight, preferably 5 to 200 parts by weight, per 100 parts by weight of component (A).
Parts by weight range. If the amount of component (B) is less than 3 parts by weight, non-fluidity and reinforcing properties cannot be obtained, and if it is more than 300 parts by weight, the viscosity of the composition increases and workability decreases.

The curing catalyst (C) used in the present invention includes tin carboxylates such as tin octylate; organotin carboxylates such as dibutyltin dilaurate, dibutyltin dilarate, and dibutyltin phthalate; organotin oxides and their esters; Examples include reactants; organic titanate esters such as tetrabutyl titanate; amines; amine salts; quaternary ammonium salts; guanidine compounds. These curing catalysts are 0.0 parts by weight per 100 parts by weight of component (A).
It is preferable to use it in a range of 0.01 to 20 parts by weight. (
If the amount of component C) is less than this, the curing speed will be too slow and it will become unsuitable for use, whereas if it is more than this, it will not only be meaningless but also undesirable because there is a risk of oozing or precipitation.

Component (b) of the present invention is a component that improves the storage stability of the composition of the present invention. (D) Components include monoethylene glycol monomethyl ether, monoethylene glycol monoethyl ether, monoethylene glycol monopropyl ether, monoethylene glycol monobutyl ether, monoethylene glycol monophenyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, Diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol monophenyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether,
Triethylene glycol monopropyl ether, triethylene glycol monobutyl ether, triethylene glycol monophenyl ether, monopropylene glycol monomethyl ether, monopropylene glycol monoethyl ether, monopropylene glycol monopropyl ether, monopropylene glycol monobutyl ether, monopropylene glycol Monophenyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, dipropylene glycol monophenyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monoethyl ether, Examples include tripropylene glycol monopropyl ether, tripropylene glycol monobutyl ether, tripropylene gelicol monophenyl ether, and tetrahydrofurfuryl alcohol. Particularly preferred are monopropylene glycol monoethyl ether and monopropylene glycol monobutyl ether because of their ease of availability and handling.

Hydrolyzable silane may be added to the composition of the present invention for the purpose of imparting better adhesion or for the purpose of further improving storage stability as a one-component composition. These hydrolyzable silanes include 82N (CL) 3S1 (OCL)
T-aminopropyltriethoxysilane represented by 3, H2N(CH-) 3St (OCH2CH3) T-aminopropyltriethoxysilane represented by 3, )12N([:H2) JH(CL) 3Sl (0[
L) N(β-aminoethyl)-T-aminopropyltrimethoxysilane represented by 3, CH3CH2=[: CD-((:Hz+-r-3l (OC
H2CH3) T〇1 methacryloxypropyltriethoxysilane, cL=
c) Vinyltriethoxysilane represented by Isi (DCHJ:H3) 3, dimethyldimethoxysilane represented by (CH3) 2Sl (O[:)T3) 2, methyltrimethoxysilane represented by CH3S+(OC)T3) 3 , methyltriethoxysilane represented by CH35l (DC)12CH3) 3, and tetraethoxysilane represented by Sl (QC)12CH3). Further, these silanes may be partially hydrolyzed to form polymers.

The composition of the present invention also includes a titasotropic agent such as hydrogenated castor oil, a plasticizer such as dioctyl phthalate, butylbenzyl phthalate, and chlorinated paraffin,
Ultraviolet absorbers and antioxidants such as benzotrisols and phenols can be used as appropriate.

〔Effect of the invention〕

The composition according to the invention cures at room temperature to form a rubber-like elastomer with high elongation and excellent adhesion. Moreover, this composition is a sealing material that can be stored for a long period of time under conditions of high temperature and high humidity.

〔Example〕

The present invention will be explained below with reference to Examples. B; In the Examples and Comparative Examples, all parts represent parts by weight, and all percentages represent weight %.

Reference Example 1 5 moles of glycidyl group-end-blocked polyoxypropylene with an average degree of polymerization of 15 and a molecular weight of about 1,000.25°C and a viscosity of 270 cSt [corresponding to 6 moles per 10 (epoxy) and 10% of polyoxypropylene of methanol was added, and heating stirring was started at 60° C. under a nitrogen atmosphere. A portion was removed at 4 hour intervals from the start of heating and stirring, and N
Peak due to proton of epoxide methylene by MR (2.67 ppm based on tetramethylsilane)
observation, determination of imino groups by potentiometric titration, and 25
The viscosity was measured at °C. 12 from the start of heating and stirring
After some time, the peak due to protons of epoxide methylene disappeared, and the viscosity of the mixture, which was 80 cSt before the start of heating and stirring, reached 1.500 cSt, so CH3 CH, CH-CH2-0 (Ctl Tsujia Sl ([ ]C
Hs) 2 methyl\0/yl(γ-glycidoxypropyl)dimethoxysilane
．． 2 mol was added, and heating and stirring was continued under the same conditions. A portion of the reaction mixture was withdrawn at 4-hour intervals after the addition of the silane, and the imino groups in the sample were quantitatively investigated by potentiometric titration.
When imino groups were no longer detected after a period of time, heating and stirring was stopped, and methanol was distilled off. The obtained reaction product is N! The disappearance of the peak due to protons of epoxide methylene due to 1 R was observed, the viscosity at 25°C was 15,000 cSt, the specific gravity at the same temperature was 1.01, and the number average molecular weight measured by GPC was 6.
It was a pale yellow viscous liquid of 0.000, and it was confirmed that it was a polyether (P-1) whose molecule end was blocked with a hydrolyzable silyl group represented by the following formula.

CH CH CH CH CH3 CH2 side "Si(OCL)2 Reference Example 2 5 moles of glycidyl group-end-blocked polyoxypropylene [10 (epoxy ) Ethanol in an amount equivalent to 6 moles of polyoxypropylene and 10% of polyoxypropylene was added, and heating and stirring was started at 80°C under a nitrogen atmosphere.A portion was taken out at 2 hour intervals from the start of heating and stirring, and the epoxide was determined by NMR. The peak due to methylene protons was observed, the imino group was quantified by potentiometric titration, and the viscosity was measured at 25°C. Six hours after the start of heating and stirring, the titer decreased by almost the theoretical amount, and at the same time the protons of epoxide methylene The peak due to CH disappeared and the viscosity, which was 210 cSt before the start of heating and stirring, reached 4.0OOcSt.

CH, CH-CH2-D- (CH Tsujicho 5l (OCR2C
2.2 mol\0/ of Hs) a was added, and heating and stirring was continued under the same conditions. A portion of the silane was taken out at 2 hour intervals after the addition of the silane, and the imino groups were quantified using potentiometric titration and the peak due to protons of epoxide methylene was observed using NMH. Since most of the difference had disappeared, heating and stirring was stopped, and the ethanol was distilled off, and the viscosity at 25°C was 26,0OOcSt.
A pale yellow viscous liquid with a specific gravity of 1.01 at the same temperature and a number average molecular weight of 11.000 as measured by GPC (
A polyether (P-2) whose molecular chain terminals were blocked with a hydrolyzable silyl group represented by the following formula was obtained.

CI(.

-Cf(2CHCHa-[]-(C)I-)ysi (
DC)+2c)13) 2lH Reference Example 3 The average molecular formula of the CH3 main chain is 1CHCH20hmlCH2CH2
Molecular weight expressed as 0 draw is approximately 3,000.25℃
Glycidyl group-end-blocked polyoxyethylene polyoxypropylene copolymer 3 having a viscosity of 1010 cSt
moles [6 (epoxy) equivalents]) -1,3,4-
Add 4 moles of thiadiazole and methanol in an amount equivalent to 10% of the above copolymer, and heat at 60°C under a nitrogen atmosphere.
Heating and stirring was started. A portion was taken out at 4-hour intervals from the start of heating and stirring, and a peak due to protons of epoxide methylene (2.67 ppm based on tetramethylsilane) was observed by NMR, and the viscosity at 25° C. was measured. 12 hours after the start of heating and stirring,
The peak due to the proton of epoxide methylene disappears,
The viscosity of the mixture, which was 390 cSt before the start of heating and stirring, reached 5.200 cSt, so CH.

(γ-glycidoxypropyl)dimethoxysilane 2
．． 2 mol was added, and heating and stirring was continued under the same conditions. After adding the above silane, a portion of the reaction mixture was withdrawn at 4-hour intervals, iodine was added to react with the mercapto group, and the remaining iodine was back-titrated with sodium thiosulfate to detect the mercapto group. However, since it was no longer detected 12 hours after the addition of silane, heating and stirring was terminated, and methanol was distilled off. The resulting reaction product had a viscosity of 23.5°C at 25°C. -000cSt
It is a pale yellow viscous liquid with a specific gravity of 1.01 at the same temperature and a number average molecular weight of 9.900 as measured by GPC, and the molecular chain terminals are blocked with a hydrolyzable silyl group represented by the following formula. It was confirmed that it was polyether (P-3).

CI'+3 -CH2CHCH2-0-fcHcH20)-rffc
H2CH20bCH2CHCH2-jOH Kano H Examples 1 to 3, Comparative Examples 1 to 3 Per 100 parts of each polyether (P-1 to 3) whose terminal was closed with a hydrolyzable silyl group obtained in Reference Examples 1 to 3 After adding the filler, inorganic pigment, and titasotropic property imparting agent shown in Table 1 and uniformly dispersing them with a triple roll, further adding the organotin compound, silane coupling agent, and storage stability shown in Table 1. Add the agent and mix, and prepare samples-1 to 6.
were prepared respectively. A JIS extrusion test was conducted using each of these samples. In addition, each sample was cured into a sheet with a thickness of about 2M, and after curing at room temperature for 14 days, the JIS
A No. 2 dumbbell was punched out and subjected to a tensile test. or,
Similar tests were also conducted on samples stored in plastic cartridges for 30 days at 50 tons. The results are shown in Table 1.

Note that Comparative Examples 1i6 and 2 are comparative examples in which no storage stabilizer is used, and Comparative Example 3 is a comparative example in which Octatool is used instead of the storage stabilizer. This is also shown in Table 1. From these results, it was confirmed that the room temperature curable composition of the present invention has good long-term storage stability.

Claims (1)

[Claims] 1 (A) (A) General formula; ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (In the formula, R^1 and R^2 are divalent hydrocarbon groups, m is 10
Indicates a number of ~500. ) A polyether whose molecular chain end is blocked with an epoxy group; (b) (i) a heterocyclic compound having two imino groups bonded to two different carbon atoms in the molecule; and/or ( ii) Reacting an aromatic compound or a heterocyclic compound in which two mercapto groups are bonded to a carbon atom constituting an aromatic ring or a heterocyclic ring, and (c) an organosilicon compound having an epoxy group and a hydrolyzable group. 3 to 100 parts by weight of a polymer whose molecular chain ends are blocked with hydrolyzable silyl groups, (B) an inorganic filler, and 100 parts by weight of (A).
300 parts by weight, (C) curing catalyst, (A) 0.00 per 100 parts by weight
1 to 20 parts by weight, (D) (d) General formula; R^3-O-R^4-OH (wherein, R^3 is a monovalent hydrocarbon group or the main chain of a monovalent hydrocarbon group A non-hydrolyzable monovalent hydrocarbon group having a structure in which one or more of the methylene groups constituting the group is replaced by an oxygen, nitrogen and sulfur atom or atomic group,
R^4 represents a divalent hydrocarbon group),
Or (E) General formula; ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (In the formula, R^5 is a divalent hydrocarbon group and/or one of the methylene groups that constitute the main chain of the divalent hydrocarbon group. A non-hydrolyzable divalent hydrocarbon group consisting of a structure in which one or more atoms are substituted with oxygen, nitrogen and sulfur atoms or atomic groups, R^6 is a hydrogen atom or a monovalent hydrocarbon group, R
^7 indicates a divalent hydrocarbon group), (
A) A room temperature curable composition comprising 0.1 to 100 parts by weight per 100 parts by weight.