JPH1121442A - Room temperature curing composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a room temperature curing composition of a polyoxyalkylene polymer base having improved weather resistance. SOLUTION: This composition comprises (A) 100 pts.wt. of a hydrolyzable silicon functional group-containing polyoxyalkylene polymer which is a polyoxyalkylene polymer containing a hydroxyl group and/or a hydrolyzable silicon functional group at the terminal and/or the side chain, in which the repeating unit of a main chain is a 2-6C polyoxyalkylene, the hydrolyzable silicon functional group is an alkoxysilyl group and the number - average molecular weight is 1,000-100,000 and (B) 0.01-10 pts.wt. of a liquid mixture composed of an antioxidant, an ultraviolet light absorber and a photostabilizer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for producing a polymer having terminal and / or side chains,
A room-temperature curable composition having excellent weather resistance comprising a polyoxyalkylene polymer containing a hydroxyl group and / or a hydrolyzable silicon-functional group and three liquid mixtures of an antioxidant, an ultraviolet absorber and a light stabilizer. About things.

[0002]

TECHNICAL BACKGROUND AND PROBLEMS OF THE INVENTION Having a reactive silicon group (a silicon atom-containing group containing a hydroxyl group and / or a hydrolyzable group bonded to a silicon atom and capable of forming a siloxane bond) Organic polymers, especially polyoxyalkylene polymers, can be liquid polymers and are cured at room temperature by moisture or the like to become rubber-like cured products.
Applications of such polymers include elastic sealants for buildings. Conventionally, silicone-based sealant was mainly used for the elastic sealant of this building,
There is a problem such as contamination around joints, and it is being replaced by other polymer sealants, especially those of the polyoxyalkylene polymer used in the present invention. But,
This polyoxyalkylene polymer sealant is inferior in weather resistance and heat resistance as compared with the silicone sealant, and therefore needs to be improved. In order to improve this problem, a composition containing an ultraviolet absorber (Japanese Patent Laid-Open No. 57-17434)
No. 1), a composition to which an antioxidant is added (Japanese Unexamined Patent Publication No.
283259) has recently been found. But,
The weather resistance of the cured product is still insufficient, and further improvement is needed.

[0003]

DISCLOSURE OF THE INVENTION In view of the above problems, the present inventors have conducted intensive studies to obtain a room temperature curable composition having further improved weather resistance. As a result, an antioxidant, an ultraviolet absorber and a light stabilizer have been obtained. The present inventors have found that a room-temperature-curable composition having excellent weather resistance can be obtained by using a liquid mixture consisting of

[0004]

According to the present invention, there is provided (A) a polyoxyalkylene polymer having a hydroxyl group and / or a hydrolyzable silicon functional group at a terminal and / or a side chain thereof, wherein the repeating unit of the main chain is Is a polyoxyalkylene having 2 to 6 carbon atoms, and the hydrolyzable silicon functional group is an alkoxysilyl group, and has a number average molecular weight of 1,000 to 100,
Room temperature curable composition containing 100 parts by weight of a hydrolyzable silicon-functional group-containing polyoxyalkylene polymer of 000 (B) 0.01 to 10 parts by weight of a liquid mixture comprising an antioxidant, an ultraviolet absorber and a light stabilizer About.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The reactive silicon group-containing organic polymer that can be used in the present invention is not particularly limited, but typical examples thereof include, for example, JP-A-50-156599 and JP-A-54-156599.
No.-6096, No.57-126823, No.59-78
No. 223, No. 55-82123, No. 55-13102
No. 2, 55-137129 and 62-230822
No. 63-83131, JP-A-3-47825,
JP-A-3-72527, JP-A-3-122152, U.S. Pat. Nos. 3,632,557 and 4,345,053
Nos. 4,366,307 and 4,960,844. The reactive silicon group referred to in the present invention is not particularly limited,
Representative examples include, for example, groups represented by the following general formula (1).

[0006]

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Wherein R ¹ and R ² each have 1 carbon atom
An alkyl group having from 20 to 20 carbon atoms, an aryl group having from 6 to 20 carbon atoms, an aralkyl group having from 7 to 20 carbon atoms, or a triorganosiloxy group represented by (R ') ₃ SiO-, wherein R ¹ or R ² is 2 or more When present, they can be the same or different. Here, R 'is a monovalent hydrocarbon group having 1 to 20 carbon atoms, and the three R's may be the same or different. X represents a hydroxyl group or a hydrolyzable group, and when two or more Xs are present, they may be the same or different. a represents 0, 1, 2 or 3, b represents 0,
1 or 2 is shown, respectively. In addition, m groups represented by the formula (2)

[0008]

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In the above, b may be different. m is 0
Represents an integer of ~ 19. However, it is assumed that a + Σb ≧ 1 is satisfied. The hydrolyzable group represented by X is not particularly limited, and may be any conventionally known hydrolyzable group. Specific examples include a hydrogen atom, a halogen atom, an alkoxy group, an acyloxy group, a ketoximate group, an amino group, an amide group, an acid amide group, an aminooxy group, a mercapto group, and an alkenyloxy group. Of these, hydrogen atoms,
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 preferred, and an alkoxy group such as a methoxy group is particularly preferred from the viewpoint of mild hydrolyzability and easy handling. This hydrolyzable group or hydroxyl group can be bonded to one to three silicon atoms, and (a)
+ Σb) is preferably 1 to 5. When two or more hydrolyzable groups or hydroxyl groups are present in the reactive silicon group, they may be the same or different. The reactive silicon group may have one silicon atom or two or more silicon atoms. In the case of a reactive silicon group in which silicon atoms are linked by a siloxane bond or the like,
There may be about one. Note that a reactive silicon group represented by the following general formula (3) is preferable from the viewpoint of easy availability.

[0010]

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(Wherein R ² , X and a are the same as those described above). Specific examples of R ¹ and R ² in the general formula (1) include, for example, an alkyl group such as a methyl group and an ethyl group. ,
Cycloalkyl group such as cyclohexyl group, aryl group such as phenyl group, aralkyl group such as benzyl group, R ′
Is a methyl group or a phenyl group, and a triorganosiloxy group represented by (R ′) ₃ SiO—. R ¹ , R ² , R '
Is particularly preferably a methyl group. Among the reactive silicon group-containing organic polymers exemplified above, those in which the main chain is a polyoxyalkylene having 2 to 6 carbon atoms and the hydrolyzable silicon functional group is an alkoxysilyl group are preferable. It is particularly preferable that propylene is a reactive silicon group-containing organic polymer having a hydrolyzable silicon functional group having a dimethoxymethylsilyl group [—Si (CH ₃ ) (OCH ₃ ) ₂ group]. It is preferable that at least one, preferably 1.1 to 5 reactive silicon groups be present in one molecule of the oxypropylene polymer. When the number of reactive silicon groups contained in one molecule of the polymer is less than one, the curability becomes insufficient and it becomes difficult to exhibit good rubber elasticity behavior. The reactive silicon group may be present at the terminal of the molecular chain of the oxypropylene polymer or may be present inside. When the reactive silicon group is present at the terminal of the molecular chain, the effective network chain amount of the oxypropylene polymer component contained in the finally formed cured product increases, so that high strength, high elongation, and low elastic modulus are obtained. The resulting rubber-like cured product is easily obtained.

The oxypropylene polymer constituting the polymer main chain in the polymer of the present invention is represented by the following formula (4):

[0013]

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And a repeating unit represented by the formula: The oxypropylene polymer may be linear or branched, or a mixture thereof. Further, other monomer units and the like may be contained, but the monomer unit represented by the formula (4) may be present in the polymer in an amount of 50% by weight or more, preferably 80% by weight or more. preferable. When a reactive silicon group is introduced, the molecular weight distribution tends to be broader than that of the polymer before the introduction, so that the molecular weight distribution of the polymer before the introduction is preferably as narrow as possible.

The introduction of the reactive silicon group may be performed by a known method. That is, for example, the following method is used. (1) An oxypropylene polymer having a functional group such as a hydroxyl group at a terminal is reacted with an organic compound having an active group and an unsaturated group having reactivity with the functional group,
A hydrosilane having a hydrolyzable group is allowed to act on the obtained reaction product to perform hydrosilylation. (2) A oxypropylene polymer having a functional group such as a hydroxyl group, an epoxy group, or an isocyanate group (hereinafter, referred to as a Y functional group) at a terminal is provided with a functional group (hereinafter, referred to as Y ′) having reactivity with the Y functional group. And a compound having a reactive silicon group. Examples of the silicon compound having the Y ′ functional group include γ- (2-aminoethyl) aminopropyltrimethoxysilane, γ- (2-aminoethyl) aminopropylmethyldimethoxysilane, and γ-aminopropyltriethoxysilane. Amino-containing silanes; mercapto group-containing silanes such as γ-mercaptopropyltrimethoxysilane, γ-mercaptopropylmethyldimethoxysilane, and the like; γ-glycidoxypropyltrimethoxysilane, β- (3,4-epoxy) Epoxysilanes such as cyclohexyl) ethyltrimethoxysilane; vinyltriethoxysilane, γ
-Methacryloyloxypropyltrimethoxysilane,
Vinyl-type unsaturated group-containing silanes such as γ-acryloyloxypropylmethyldimethoxysilane; chlorine atom-containing silanes such as γ-chloropropyltrimethoxysilane; γ-isocyanatopropyltriethoxysilane, γ-isocyanatepropyl Isocyanate-containing silanes such as methyldimethoxysilane; and hydrosilanes such as methyldimethoxysilane, trimethoxysilane, and methyldiethoxysilane can be specifically exemplified, but are not limited thereto.

Next, the liquid mixture used in the present invention will be described. The liquid mixture comprising the antioxidant, the ultraviolet absorber and the light stabilizer used in the present invention is a mixture of three types of weather resistance improvers which remain liquid at normal temperature. Antioxidants here are generally referred to as "Antioxidant Handbook" (published by Taisei), "Deterioration and stabilization of polymer materials" (p.235-242)
(Issued by CMC Co., Ltd.). The ultraviolet absorber is not particularly limited, but benzophenone-based, triazole-based, acrylate-based, and salicylate-based UV absorbers are generally used. Also, the light stabilizer is not limited,
Known hindered amines and benzoates are exemplified. These three types of weather resistance improvers are used to prevent the degradation of the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer which is the component (A), and have different effects. An ultraviolet absorber is effective in preventing deterioration (oxidation) due to the energy of light (such as photoexcitation) in the initial stage of deterioration by blocking ultraviolet light having an absorption wavelength due to its structure. It is said that the thermal degradation (oxidation) due to heat is effective in preventing the progress of the degradation by capturing radicals derived from the thermal degradation (oxidation) of the organic polymer. Further, it is known that the light stabilizer improves the weather resistance by a combined mechanism, but the following two points are given. For one, it reduces and inactivates oxidative products generated during the oxidative degradation of organic polymers. The other is that the light stabilizer (N-oxyl derivative derived from it) is a radical (R, ROO, RC (O) OO, etc.) generated by the autoxidation of an organic polymer; Group) catalytically and convert it to a stable substance,
It is effective in terminating the chain reaction of decomposition of the organic polymer. Although these antioxidants, ultraviolet absorbers and light stabilizers are already known substances in the field of organic resins, the present invention is characterized in that these three types of weather resistance improver mixtures are liquid. The fact that it has and is in this liquid state realizes weather resistance that could not be achieved conventionally.
A mixture of antioxidants, UV absorbers and light stabilizers,
Usually, in order to maintain a liquid state at the temperature (normal temperature) at which the composition is used, at least one of the antioxidants, ultraviolet absorbers, and light stabilizers used must be liquid at normal temperature. Since these three types of mixtures, which are the essence of the present invention, are liquid, they do not have the problem of dust, can be easily added and compounded, and can be easily mixed and dispersed, as compared with conventional general weatherability improvers. is there. The ease of mixing and dispersion of the liquid mixture into the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer makes it possible to improve the weather resistance of the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer. Was.

When each of the components of the antioxidant, the ultraviolet absorber and the light stabilizer has high solubility in the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer, and / or Precipitation (sedimentation) in the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer phase even at low temperatures when all components of the ultraviolet absorber and light stabilizer are liquid.
Since there is no problem of crystallization and no problem of crystallization, it is possible to further improve the weather resistance, and it is also possible to add it during construction. The compatibility of each component of the antioxidant, the ultraviolet absorber, and the light stabilizer, the compatibility with the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer, in order to sufficiently exert the effect of each component. Is important, and the antioxidant, the ultraviolet absorber, and the light stabilizer preferably have good compatibility with the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer, and have good compatibility of each component. Are more preferred.

Specifically, octylated diphenylamine, 2,4-bis [(octylthio) methyl] -o-cresol, and isooctyl-3-yl are used as liquid antioxidants.
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionate, 6-ethoxy-1,2-dihydro-
2,2,4-trimethylquinoline, diphenylamine and acetone reactant, α-methylbenzylphenol, hindered phenol, methyl-3- [3-t-butyl-5- (2H-benzotriazole) as a liquid ultraviolet absorber -2-yl) -4-hydroxyphenyl] propionate-polyethylene glycol condensate, (2-hydroxy-3-dodecyl-5-methyl) phenylbenzotrial, bis (1,2,2 2,
6,6-pentamethyl-4-piperidinyl) sebacate, and the like, and a mixture thereof and a material selected from conventional antioxidants, ultraviolet absorbers, and light stabilizers,
A liquid mixture is obtained. As described above, it is preferable that all these three types be liquid.

The amount of the liquid mixture comprising such an antioxidant, an ultraviolet absorber and a light stabilizer is determined by the amount of (A) the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer 10
0 to 10 parts by weight, preferably 0.01 to 10 parts by weight,
More preferably, it is 0.1 to 5 parts by weight. Addition amount
If the amount is less than 0.01 parts by weight, the effect is not sufficient, and
Exceeding 10 parts by weight is meaningless in terms of effectiveness and disadvantageous economically. The mixing ratio of the three kinds in the liquid mixture comprising an antioxidant, an ultraviolet absorber, and a light stabilizer is not particularly limited. However, in order to keep the liquid mixture in a liquid state and to obtain excellent weather resistance, three kinds of mixing ratios are required. Are preferably mixed in the same ratio.

In curing the composition of the present invention, a curing catalyst may or may not be used. When a curing catalyst is used, conventionally known curing catalysts can be widely used. Specific examples thereof include titanates such as tetrabutyl titanate and tetrapropyl titanate; tin carboxylate salts such as dibutyltin dilaurate, dibutyltin maleate, dibutyltin diacetate, tin octylate, tin naphthenate; dibutyltin oxide and phthalate Dibutyltin diacetylacetonate; organoaluminum compounds such as aluminum trisacetylacetonate, aluminum trisethylacetoacetate, diisopropoxyaluminum ethylacetoacetate; chelates such as zirconium tetraacetylacetonate and titanium tetraacetylacetonate Compounds; lead octylate; butylamine, octylamine, laurylamine, dibutylamine, monoethanolamine , Diethanolamine, triethanolamine, diethylenetriamine, triethylenetetramine, oleylamine, cyclohexylamine, benzylamine, diethylaminopropylamine, xylylenediamine, triethylenediamine, guanidine, diphenylguanidine, 2,4,6-tris (dimethylaminomethyl) Phenol, morpholine, N
Amine compounds such as -methylmorpholine, 2-ethyl-4-methylimidazole, 1,8-diazabicyclo (5.4.0) undecene-7 (DBU), or salts of these amine compounds with carboxylic acids and the like; Low molecular weight polyamide resin obtained from excess polyamine and polybasic acid; reaction product of excess polyamine and epoxy compound; γ; aminopropyltrimethoxysilane, N- (β
Silanol condensation catalysts such as silane coupling agents having an amino group such as -aminoethyl) aminopropylmethyldimethoxysilane; and other known silanol condensation catalysts such as other acidic catalysts and basic catalysts.
These catalysts may be used alone or in combination of two or more. The amount of these curing catalysts used is preferably about 0.1 to 20 parts, more preferably about 1 to 10 parts, per 100 parts of the reactive silicon group-containing organic polymer. If the amount of the curing catalyst used is too small relative to the reactive silicon group-containing oxypropylene polymer, the curing rate becomes slow, and the curing reaction does not easily proceed sufficiently. On the other hand, if the amount of the curing catalyst used is too large relative to the amount of the reactive silicon group-containing organic polymer, local heat generation or foaming occurs during curing, and it is difficult to obtain a good cured product, which is not preferable.

The reactive silicon group-containing organic polymer can be modified by incorporating various fillers. As fillers, reinforcing fillers such as fumed silica, precipitated silica, silicic anhydride, hydrous silicic acid and carbon black; calcium carbonate, magnesium carbonate, diatomaceous earth, calcined clay, clay, talc, titanium oxide, bentonite, Organic bentonite, ferric oxide, zinc oxide, activated zinc flower,
Fillers such as hydrogenated castor oil and shirasu balloon;
Fibrous fillers such as asbestos, glass fibers and filaments are exemplified.

When it is desired to obtain a high-strength cured composition with these fillers, fumed silica, precipitated silica, silicic anhydride, hydrous silicic acid, carbon black, surface-treated fine calcium carbonate, calcined clay, clay If a filler selected from the group consisting of activated zinc white and the like is used in an amount of 1 to 100 parts based on 100 parts of the reactive silicon group-containing organic polymer, preferable results can be obtained. When it is desired to obtain a cured composition having a low strength and a large elongation, a filler selected mainly from titanium oxide, calcium carbonate, magnesium carbonate, talc, ferric oxide, zinc oxide and shirasu balloon is used. If it is used in an amount of 5 to 200 parts per 100 parts of the reactive silicon group-containing oxypropylene polymer, preferable results can be obtained. Of course, these fillers may be used alone or in combination of two or more.

In the curable composition of the present invention, it is more effective to use a plasticizer in combination with a filler, since the elongation of the cured product can be increased or a large amount of filler can be mixed. As this plasticizer, dioctyl phthalate,
Phthalates such as dibutyl phthalate and butyl benzyl phthalate; aliphatic dibasic esters such as dioctyl adipate, isodecyl succinate and dibutyl sebacate; glycol esters such as diethylene glycol dibenzoate and pentaerythritol; Aliphatic esters such as butyl oleate and methyl acetyl ricinoleate; phosphates such as tricresyl phosphate, trioctyl phosphate and octyl diphenyl phosphate; epoxy plastics such as epoxidized soybean oil and epoxy benzyl stearate; Polyester plasticizers such as polyesters of dibasic acid and dihydric alcohol; Polyethers such as polypropylene glycol and its derivatives; Poly-α-methylstyrene, polystyrene Polystyrenes such emissions; polybutadiene, butadiene - acrylonitrile copolymer, polychloroprene, polyisoprene, polybutene, can be used in any form of plasticizers alone or a mixture of two or more of such chlorinated paraffins. When the amount of the plasticizer is in the range of 0 to 100 parts based on 100 parts of the reactive silicon group-containing organic polymer, preferable results are obtained.

The method for preparing the curable composition of the present invention is not particularly limited. For example, the above-mentioned components are blended and kneaded at room temperature or under heat using a mixer, roll or kneader, or a suitable solvent is added. Conventional methods such as dissolving and mixing components using a small amount can be employed. In addition, by appropriately combining these components, one-pack type or two-pack type
Liquid formulations can also be made and used. When exposed to the atmosphere, the curable composition of the present invention forms a three-dimensional network by the action of moisture and cures to a solid having rubber-like elasticity.

In using the curable composition of the present invention, if necessary, an adhesion improver, a physical property modifier,
Various additives such as a storage stability improver, a lubricant, a pigment, and a foaming agent can be appropriately added.

The curable composition of the present invention is particularly useful as an elastic sealant and can be used as a sealant for buildings, ships, automobiles, roads and the like. Further, since it can adhere to a wide range of substrates such as glass, porcelain, wood, metal, and resin moldings alone or with the aid of a primer, it can be used as various types of sealing compositions and adhesive compositions. . Further, it is also useful as a food packaging material, a cast rubber material, a molding material, and a paint.

[0027]

Next, the present invention will be described in further detail with reference to examples, but the present invention is not limited to these examples. In the examples, all parts are parts by weight, and all physical properties are values at 25 ° C. and 60% relative humidity. Example 1 85% of all terminals contain a (CH ₃ O) ₂ (CH ₃ ) SiCH ₂ CH ₂ CH ₂ — group,
Polyoxypropylene polymer having a number average molecular weight of 9,000 as measured by gel permeation chromatography (Polymer I) 1
A base agent I was prepared by mixing 120 parts by weight of 00 parts by weight, 120 parts by weight of colloidal calcium carbonate surface-treated with a fatty acid having a particle size of 0.08 μm, 55 parts by weight of dioctyl phthalate, 20 parts by weight of titanium oxide and 6 parts by weight of linseed oil. Separately, 30 parts by weight of tin octylate,
5 parts by weight of laurylamine, 65 parts by weight of dioctyl phthalate, and 200 parts by weight of titanium oxide were fractionated and mixed to prepare a curing agent I. Further, the weather resistance improver liquid mixture (w-1)
Antioxidant, hindered phenol: isooctyl-3
-(3,5-di-t-butyl-4-hydroxyphenyl) propionate, ultraviolet absorber, benzotriazole: (2-hydroxy-3-dodecyl-5-methyl) phenylbenzotriazole, light stabilizer, hindered amine: Bis (1,2,2,6,6-pentamethyl-4-
Piperidinyl) sebacate was prepared by mixing and collecting equimolar amounts. W-1 is added to 100 parts by weight of the main ingredient I.
After adding 1.5 parts by weight and mixing for 20 minutes, 10 parts by weight of a curing agent I are mixed to prepare a curable composition, molded into a sheet having a thickness of 2 mm, and cured at room temperature for 7 hours and then at 50 ° C. for 7 days. To obtain a cured product. The sheet was evaluated for mechanical properties. After irradiation for 2,000 hours with a sunshine weatherometer, mechanical properties were evaluated and surface deterioration was visually observed. Table 1 shows the results.

Example 2 Antioxidant, hindered phenol: triethylene glycol-bis [3- (3-tert-butyl-5-methyl-4)
-Hydroxyphenyl) propionate] is an equimolar yellow transparent viscous ultraviolet absorber: methyl-3- [3-
t-butyl-5- (2H-benzotriazol-2-yl) -4-hydroxyphenyl] propionate-polyethylene glycol condensate is a light yellow viscous substance in an equimolar amount: bis (1,2,2) , 6,6-Pentamethyl-4-piperidinyl) sebacate, mixed and dissolved to prepare a weather resistance improver liquid mixture w-II. 1.7 parts by weight of W-II was added to 100 parts by weight of the base material I prepared in Example 1, and after mixing for 20 minutes, the curing agent I 10 prepared in Example 1 was added.
The curable composition was prepared by mixing parts by weight. afterwards,
Evaluation was performed in the same manner as in Example 1. Table 1 shows the results.

Comparative Examples 1-3 Antioxidants: 2,2'-methylenebis (4-methyl-6-
t-butylphenol), UV absorber: 2- (3,5
-Di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole was used in an equimolar amount, and an equimolar 2- (3,5-di-t-butyl-4-hydroxybenzyl) -2- was used as a light stabilizer. Bis (1,2,2, n-butylmalonate)
(6,6-pentamethyl-4-piperidyl) was replaced with w-III; and similarly, the light stabilizer was replaced with an equimolar bis (2,2,6.6-tetramethyl-4-piperidyl) sebacate. The product obtained is an equimolar amount of poly [{6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl] with w-IV and a light stabilizer. (2,2,6,6-tetramethyl-4-piperidyl) imino {hexamethylene} (2,2,6,6-tetramethyl-4-piperidyl) amino] -6-chloro-
What was replaced with a 1,3,5-triazine condensate was replaced with w-
Prepared as V. 1.5 parts by weight of w-III (Comparative Example 1) and 1.6 parts by weight of w-IV were added to 100 parts by weight of the base material I prepared in Example 1.
Parts by weight (Comparative Example 2) and 1.9 parts by weight of wV (Comparative Example 3) were added, and 10 parts by weight of a curing agent I were mixed. Thereafter, evaluation was performed in the same manner as in Example 1. Table 1 shows the results.

[0030]

[Table 1]

Claims (2)

[Claims] (A) A polyoxyalkylene polymer having a hydroxyl group and / or a hydrolyzable silicon functional group at a terminal and / or a side chain, wherein the repeating unit of the main chain has 2 to 6 carbon atoms. The polyoxyalkylene of the hydrolyzable silicon functional group is an alkoxysilyl group, number average molecular weight
100 to 100 parts by weight of a hydrolyzable silicon-functional group-containing polyoxyalkylene polymer of 1,000 to 100,000 (B) Room temperature curability containing 0.01 to 10 parts by weight of a liquid mixture comprising an antioxidant, an ultraviolet absorber and a light stabilizer Composition. 2. The room temperature curable composition according to claim 1, wherein the main chain of the hydrolyzable silicon-functional group-containing polyoxyalkylene polymer is substantially polyoxypropylene.