JP2804012B2 - Dust adhesion reduction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an oxyalkylene polymer having a hydroxyl group and / or a hydrolyzable group bonded to a silicon atom and having a silicon-containing group which can be crosslinked by forming a siloxane bond. The present invention relates to a method for reducing the dust adhesion of the surface of a cured product of a curable composition.

[0002]

2. Description of the Related Art A silicon-containing group having a hydroxyl group and / or a hydrolyzable group bonded to a silicon atom and capable of crosslinking by forming a siloxane bond (hereinafter referred to as a reactive silicon group). Oxyalkylene-based polymers having a carboxylic acid group) are disclosed in JP-A-52-7399.
No. 8 and the like, and a typical example is a general formula:

[0003]

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(Wherein X ′ is a hydrolyzable group such as a methoxy group).

An oxyalkylene polymer having a reactive silicon group has a siloxane bond (S) between the polymers due to the action of moisture in the air at room temperature, such as a silicone rubber cured at room temperature.
It cures by forming i-O-Si) to give a rubbery cured product. This cured product has excellent tensile properties such as large elongation, low modulus, and high breaking strength, excellent adhesiveness, paintability of paint, and the like, and is therefore used for applications such as sealants and adhesives.

Although the cured product of the oxyalkylene polymer having a reactive silicon group has the above-mentioned excellent characteristics, when it is used for a sealant or the like, it is generally desirable that the cured product has a low modulus. Often. Although this cured product has good paintability, it has a drawback that when a paint called alkyd paint is used, the paint is difficult to dry and harden. Further, since the cured product tends to adhere dust to the surface and impairs aesthetic appearance, it may be difficult to use the cured product as a sealant or a paint. JP-A-61-3406
As disclosed in Japanese Patent Application Publication No. 6-36, the present inventors have proposed a composition that gives a cured product of an oxyalkylene-based polymer having a reactive silicon group having a low modulus, and one of the polymer and one in the molecule. A composition comprising a compound having a silanol group and / or a compound capable of forming a compound having one silanol group in a molecule by reacting with water (hereinafter, also referred to as a monovalent silanol compound) has been proposed. .

However, the coatability and dust adhesion of the alkyd paint of the cured product of the composition tend to be further deteriorated as compared with the cured product of the composition without the monovalent silanol compound.

[0008] Hardness object is improved paintability alkyd paints, and contain an oxyalkylene polymer having a reactive silicon group to give a cured product of low modulus of the present invention
Reduce the surface dust adhesion of the cured product of the reduction composition
Is to get the way .

[0009]

[0010]

According to the present invention, there is provided (A) at least one silicon-containing group having a hydroxyl group and / or a hydrolyzable group bonded to a silicon atom and capable of crosslinking by forming a siloxane bond. (B) reacting with a compound having one silanol group in the molecule and / or water to form one silanol group in the molecule with respect to 100 parts (parts by weight, hereinafter the same) of the oxyalkylene polymer 0.1 to 20 parts of a compound capable of forming a compound having an unsaturated group and (C) a compound having an air oxidation-curable unsaturated group.
Hydroxide bonded to silicon atom, characterized by adding 1 to 20 parts
Groups and / or hydrolyzable groups,
Less silicon-containing groups that can be crosslinked by forming
Contains at least one oxyalkylene polymer
The present invention relates to a method for reducing dust adhesion on the surface of a cured product of a curable composition .

The air oxidation-curable compound containing an unsaturated group is a compound which is cured by a crosslinking reaction or the like by oxygen in the air, and after curing, becomes a relatively rigid cured product. Therefore, when the purpose is to obtain a curable composition that gives a cured product having a low modulus, a compound containing an air oxidation-curable unsaturated group which is considered to have a high modulus in this composition is used. The addition is usually not possible.

However, the curable composition of the present invention maintains the modulus of the cured product almost unchanged, even when an air oxidation-curable compound containing an unsaturated group is added, as compared with the case where no compound is added. , And the adhesion of dust is improved.

Furthermore, the cured product of the curable composition of the present invention is not adherent dust alone can also improve the curability of the alkyd paint.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The oxyalkylene polymer having at least one reactive silicon group (hereinafter referred to as oxyalkylene polymer (A)) used in the present invention is disclosed in JP-B-45-36319 and JP-B-46-46319. No. 12154, 49
-32673, JP-A-50-156599, 51
-73561, 54-6096, 55-821
No. 23, No. 55-123620, No. 55-12512
No. 1, 55-131022 and 55-135135
No. 55-137129.

The molecular chain of the oxyalkylene polymer (A) has essentially the general formula: -R ¹ -O- wherein R ¹ is a substituted or unsubstituted 2
(Valent hydrocarbon group). The main chain of the oxyalkylene polymer has the general formula: -R
It may be composed of only the repeating unit represented by ¹ -O-, or may contain other repeating units. When other repeating units are contained, the general formula: —R ¹ —O
The repeating unit represented by-is preferably at least 60% (% by weight, the same applies hereinafter) of the polymer, and more preferably at least 80%.

R ¹ is a substituted or unsubstituted divalent aliphatic hydrocarbon group having 2 to 5 carbon atoms, particularly 3 to 4 carbon atoms.
Are preferred. Further, specific examples of R ¹ include:

[0017]

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[0018] In particular,

[0019]

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Is preferred. The molecular chain of the oxyalkylene polymer (A) may be composed of only one type of repeating unit, or may be composed of two or more types of repeating units.

The reactive silicon group in the oxyalkylene polymer (A) is a well-known functional group, and has a feature that it can be crosslinked at room temperature. A typical example of the reactive silicon group is represented by the general formula (I):

[0022]

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[0023] (wherein, in R ² is a monovalent organic group having 1 to 40 carbon atoms, R ² when R ² is present two or more may be different, X is a hydroxyl group or a hydrolyzable group Yes, X is 2
X may be different when more than one exists, a is 0,
1 or 2, b is 0, 1, 2, or 3, and b +
(Sum of a) ≧ 1, m is an integer of 0 to 19, and m is 2
Above

[0024]

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A need not be the same). Among the reactive silicon groups represented by the general formula (I), the general formula (I)
I):

[0026]

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(Wherein R ² and X are the same as above, and c is 1, 2 or 3).

Specific examples of the hydrolyzable group which is one type of X in the general formula (I) include a halogen atom, a hydrogen atom,
Examples thereof include 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. Among these, the methoxy group, in that the hydrolyzability is mild,
Alkoxy groups such as ethoxy groups are preferred.

In the general formula (I), R ² is
Examples thereof include a substituted or unsubstituted hydrocarbon group having 1 to 40 carbon atoms and a triorganosiloxy group. Representative examples of R ² include an alkyl group such as a methyl group and an ethyl group,
Cycloalkyl groups such as cyclohexyl groups, aryl groups such as phenyl groups, aralkyl groups such as benzyl groups,
General formula such as trimethylsiloxy group: (R ′) ₃ SiO— (R ′ is a monovalent organic group having 1 to 20 carbon atoms, and three R ′
Need not be the same). Of these, a methyl group is particularly preferred.

The number of reactive silicon groups in the oxyalkylene polymer (A) may be one or more. From the viewpoint of obtaining sufficient curability, the number of reactive silicon groups is 1.1 or more on average, and more preferably 1.5 or more. ~ 4 are preferred. Further, the reactive silicon group is preferably present at the terminal of the molecular chain of the oxyalkylene polymer (A).

The number average molecular weight of the oxyalkylene polymer (A) is preferably from 3,000 to 30,000,
Those having a molecular weight of 5,000 to 15,000 are more preferred. The oxyalkylene polymer (A) may be used alone or in combination of two or more.

The oxyalkylene polymer (A) can be produced by various methods. As an example of such a method, an oxyalkylene polymer having a certain functional group (referred to as Y group) is reacted with a functional group capable of reacting with the Y group (referred to as Y ′ group) and a compound having a reactive silicon group. And introducing a reactive silicon group into the oxyalkylene polymer.

As a specific example of such a method, an oxyalkylene polymer having an unsaturated group and HSi
Method of reacting (hydrosilylation) a hydrosilane compound having a hydrolyzable group such as (OCH ₃ ) ₃ with a group VIII transition metal compound or the like as a catalyst (reaction example)

[0034]

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Method for subjecting an oxyalkylene polymer having an unsaturated group to an addition reaction with a compound having a mercapto group and a reactive silicon group such as HS (CH ₂ ) ₃ Si (OCH ₃ ) ₃ Oxygen having an isocyanate group Method of reacting an alkylene polymer with a compound having an active hydrogen group and a reactive silicon group such as H ₂ N (CH ₂ ) ₃ Si (OCH ₃ ) ₃ (reaction example)

[0036]

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A method of reacting an oxyalkylene polymer having a hydroxyl group with a compound having an isocyanate group and a reactive silicon group such as OCN (CH ₂ ) ₃ Si (OCH ₃ ) ₃ is exemplified. Among these methods, a method of reacting an oxyalkylene polymer having an unsaturated group with a hydrosilane compound is often used. An oxyalkylene polymer having an unsaturated group is disclosed in JP-A-54-60.
As disclosed in JP-A-97-97, a method of introducing an unsaturated group using a hydroxyl group of an oxyalkylene polymer having a hydroxyl group can be used.

The oxyalkylene polymer (A) used in the present invention is not limited to the one obtained by the above method, and any polymer obtained by any other method can be used. . Further, a polymer obtained by polymerizing a polymerizable monomer such as a vinyl monomer in the presence of the oxyalkylene polymer (A), or a polymerizable monomer in the presence of an oxyalkylene polymer having a hydroxyl group A polymer in which a polymer chain or the like is modified, such as a polymer obtained by polymerizing a polymer and further introducing a reactive silicon group, is also included in the oxyalkylene polymer (A) of the present invention. It is united.

The curable composition of the present invention contains a compound having one silanol group in the molecule and / or
A compound (monovalent silanol-based compound) capable of forming a compound having one silanol group in the molecule by reacting with water is used. This component has the effect of reducing the modulus of the cured product of the oxyalkylene polymer (A). Further, this component has an excellent feature that it can be easily obtained and the above-mentioned effects can be obtained simply by adding it to the oxyalkylene polymer (A).

The compound having one silanol group in the molecule, which is one of the monovalent silanol compounds, includes:

[0041]

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Any compound having one in the molecule can be used without particular limitation. Specific examples of the compound include, for example,

[0043]

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A compound represented by the following general formula: (R ³ ) ₃ SiOH (wherein R ³ is the same or different and is a substituted or unsubstituted alkyl or aryl group having 1 to 20 carbon atoms),

[0045]

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[0046]

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A cyclic polysiloxane compound containing a silanol group such as

[0048]

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(Wherein R ³ is the same as described above, n is 0 or an integer of 1 to 40), and a chain polysiloxane compound containing a silanol group. Of these compounds,

[0050]

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The higher the content, the greater the effect of the same addition amount. From this point, (CH ₃ ) ₃ SiOH, (CH ₃ C)
H ₂ ) ₃ SiOH is preferred. Further, (C ₆ H ₅ ) ₃ SiOH is preferred from the viewpoint of easy handling and stability in air.

Compounds which can react with water to form a compound having one silanol group in the molecule are known as so-called silylating agents.

[0053]

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And the like, which can be preferably used.
Of hydrolysis products

[0055]

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In view of the high content

[0057]

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It is particularly preferred.

The reason that these compounds are effective in improving the tensile properties of the cured product of the curable composition , that is, in reducing the modulus and elongation, is that these compounds are reactive in the oxyalkylene polymer (A). It is considered that the number of cross-linking points in the cured product of the polymer is reduced by reacting with silicon groups and capping, the molecular weight between cross-linking points is increased, and as a result, low modulus and high elongation are achieved. Can be

The addition amount of the monovalent silanol compound is generally 0.1 to 20 parts, preferably 0.5 to 10 parts, per 100 parts of the oxyalkylene polymer (A). Silanol equivalent to reactive silicon group contained in coalescence (A)

[0061]

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The amount of addition can also be determined by calculation in the above. Usually, the equivalent of silanol may be 0.1 to 0.9 times the equivalent of the reactive silicon group. However,
It is preferable that at least one reactive silicon group remaining without being completely capped by the compound remains in the molecule of the oxyalkylene polymer (A). It is possible to use the silanol group with an equivalent of more than 0.9 times, but this is not economically advantageous.

Examples of the compound containing an air oxidation-curable unsaturated group in the molecule (hereinafter referred to as an unsaturated group-containing compound) used in the present invention include drying oils represented by tung oil, linseed oil and the like. , Various alkyd resins obtained by modifying the compound; acrylic polymers, epoxy resins, silicone resins modified with drying oil; 1,2-polybutadiene;
Specific examples thereof include polymers and copolymers of 1,4-polybutadiene and C ₅ -C ₆ dienes, and various modified products of the polymer and copolymer (maleated modified products, boiled oil modified products, etc.). Of these, tung oil and liquid materials (liquid diene polymers) and modified products thereof among diene polymers are particularly preferred.

Specific examples of the liquid diene polymer include butadiene, chloroprene, isoprene, 1,3-
A liquid polymer obtained by polymerizing or copolymerizing a diene-based compound such as pentadiene, or a copolymer of acrylonitrile and styrene such as acrylonitrile and styrene, such that the diene-based compound is mainly used. Examples thereof include liquid polymers such as NBR and SBR obtained by polymerization, and various modified products thereof (maleated modified products, boiled oil modified products, etc.). Among these liquid diene polymers, liquid polybutadiene is preferable,
1,2-polybutadiene is more preferred.

The air oxidation-curable compounds may be used alone or in combination of two or more.

The amount of the air oxidation-curable compound used is 0.1 to 20 with respect to 100 parts of the oxyalkylene polymer (A).
Parts is preferred, and more preferably 1 to 10 parts. When the use amount is less than 0.1 part, the improvement in dust adhesion and the drying property of the alkyd paint, which is the purpose of using the air oxidation-curable compound, becomes insufficient, and when the amount exceeds 20 parts, the tensile properties of the cured product are reduced. There is a tendency to be impaired.

The curable composition of the present invention may contain a curing accelerator, a plasticizer, a filler, and other additives, if necessary.

The curing accelerator that can be used in the present invention includes:
Examples thereof include an organic tin compound, an acid phosphate, a reaction product of an acid phosphate with an amine, a saturated or unsaturated polycarboxylic acid or an acid anhydride thereof, and an organic titanate compound.

Specific examples of the organotin compound include dibutyltin dilaurate, dioctyltin dimaleate, dibutyltin phthalate, tin octylate, dibutyltin methoxide, and the like.

The acidic phosphoric acid ester is

[0071]

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A phosphate ester containing a moiety
For example

[0073]

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(Wherein d is 1 or 2, and R ⁴ is an organic group).

[0075]

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[0076]

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And the like.

Examples of the organic titanate compound include titanates such as tetrabutyl titanate, tetraisopropyl titanate and triethanolamine titanate.

When a curing accelerator is used, the amount used is 0.1 to 1 based on 100 parts of the oxyalkylene polymer (A).
It is preferable to use it in the range of 0 parts.

As the plasticizer that can be used in the present invention, generally used low-molecular plasticizers such as dioctyl phthalate, high-molecular plasticizers or high-viscosity plasticizers can be used. Among these, the use of a high-molecular plasticizer or a high-viscosity plasticizer in the present invention is better than the use of a low-molecular plasticizer .
The coatability of the alkyd paint on the cured product of the curable composition becomes extremely excellent.

Specific examples of the low-molecular plasticizer include phthalic acid esters such as dibutyl phthalate, diheptyl phthalate, di (2-ethylhexyl) phthalate, butyl benzyl phthalate and butyl phthalyl butyl glycolate; dioctyl adipate, dioctyl Non-aromatic dibasic acid esters such as sebacate; and phosphate esters such as tricleandyl phosphate and tributyl phosphate.

The polymer plasticizer may have a molecular weight of 500
~ 15,000, more preferably 750 ~ 12,500, particularly preferably 1,000 ~ 10,000.

Specific examples of such a high-molecular plasticizer include, for example, polyester plasticizers such as polyesters of dibasic acid and dihydric alcohol; polyethers such as polypropylene glycol and derivatives thereof;
Polystyrenes such as methylstyrene and polystyrene;
Examples include, but are not limited to, polybutadiene, butadiene-acrylonitrile copolymer, polydienes such as polychloroprene and polyisoprene; and polyolefins such as polybutene and hydrogenated polybutene. Among these, polyester plasticizers, polyethers, polystyrenes, polybutadienes, polybutenes and the like, especially polyethers, are not only capable of improving the drying property of alkyd paints, but also include oxyalkylene polymers (A). It is a preferable plasticizer because it has good compatibility, lowers the viscosity of the composition, is excellent in workability, and can lower the elastic modulus and elongate the cured product.

Among the above polyethers, those having a number average molecular weight of 4,500 or more are preferable, and
The one of 000 is particularly preferred.

Further, those having a small number of molecular terminals or those having a small number of hydroxyl groups at the molecular terminals are preferable in that the dried alkyd paint has good drying properties, and those having substantially no hydroxyl group at the molecular terminals are more preferable. preferable. For the same reason, those having a terminal at an alkyl ether group, an allyl ether group, an aryl ether group or the like are more preferable. Further, the proportion of the component having a number average molecular weight of 1,000 or less is preferably 10% or less (the proportion from the value measured by the GPC method, the same applies hereinafter), because the drying property of the alkyd paint is improved. It is particularly preferred that there is. Also, the molecular weight of polyethers is narrow distribution, namely,

[0086]

[Outside 1]

It is preferable that the alkyd-based paints have a small ratio of low molecular weight components, so that the dried alkyd paints have good drying properties.

[0088]

[Outside 2]

Are preferably 2 or less, more preferably 1.6 or less.

Specific examples of such polyethers include, for example, polyoxypropylene glycol having a number average molecular weight of 4,000 or more and having a narrow molecular weight distribution or a small content of 1,000 or less. One end of which, preferably both ends are those whose hydroxyl groups are blocked by alkyl ether bond, alkyl phenyl ether bond, alkenyl ether bond, allyl ether bond, etc., urethane bond, ester bond, urea bond, amide bond, carbonate bond, etc. And a group in which a hydroxyl group is blocked by a group such as an alkyl group, an aryl group, and an alkenyl group, and the like.
It is not limited to these.

The high-viscosity plasticizer has a viscosity of 8P at 25 ° C.
The molecular weight is not particularly limited as long as the molecular weight is at least about 20 P, preferably about 20 to 300 P. However, since the viscosity generally increases as the molecular weight increases, most of the high-molecular plasticizers also become high-viscosity plasticizers. .

Specific examples of the high-viscosity plasticizer other than the high-molecular plasticizer include, for example, triaryldieethane, a mixture of isomers thereof, 1-phenyl-1-xylylethane, and chlorinated paraffin. It is not something to be done. Of these, triaryldieethane, a mixture of isomers thereof, and the like are preferable.

The plasticizers may be used alone or in combination of two or more. In addition, these plasticizers may be blended as a solvent or the like during the production of the oxyalkylene polymer (A).

When a plasticizer is used, it is used in an amount of 1 to 150 parts per 100 parts of the oxyalkylene polymer (A).
Parts, preferably 10 to 120 parts, more preferably 20 to 100 parts.

Examples of the filler include heavy calcium carbonate, light calcium carbonate, colloidal calcium carbonate,
Examples include kaolin, talc, silica, titanium oxide, aluminum silicate, magnesium oxide, zinc oxide, carbon black and the like.

When a filler is used, the amount of the filler is 10 to 3 based on 100 parts of the oxyalkylene polymer (A).
A range of 00 parts is preferred.

Examples of the other additives include anti-sagging agents such as hydrogenated castor oil and organic bentonite, coloring agents, anti-aging agents, and adhesion-imparting agents.

The hardening material of the present invention thus obtained
The curable composition can be usefully used as an adhesive, a pressure-sensitive adhesive, a paint, a coating film waterproofing agent, a sealing material composition, a molding material, a cast rubber material, a foam material, and the like.

For example, when applied as a building sealing agent, usually 10 to 300 parts of an inorganic filler such as calcium carbonate, talc or kaolin is added to the composition used in the present invention, and if necessary, titanium oxide or carbon black is added. After adding an appropriate amount of an antioxidant such as a pigment, UV absorber, radical chain inhibitor, etc., knead it evenly with a kneader or paint roll, etc., and cure by exposing it to moisture in the air. A rubber elastic body exhibiting good characteristics can be obtained.

[0100]

EXAMPLES Next, the composition of the present invention will be specifically described based on examples.

Synthesis Example 1 800 g of a polyoxypropylene polymer having an average molecular weight of about 8,000 and having an allyl ether group introduced at 97% of all terminals
Was placed in a pressure-resistant reaction vessel equipped with a stirrer, and 19 g of methyldimethoxysilane was added. Then, a chloroplatinic acid catalyst solution (H ₂ P
Tcl ₆ · 6H and the ₂ O in 8.9g of isopropyl alcohol 18ml and the solution was dissolved in tetrahydrofuran 160 ml) 0.34 ml for 6 hours at 80 ° C. After the addition of.

The amount of the remaining silicon hydride groups in the reaction solution
As a result of quantification by R spectrum analysis, almost no residue remained. When the reactive silicon group was quantified by the NMR method,

[0103]

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A polyoxypropylene polymer having about 1.7 per molecule was obtained.

Examples 1 to 8 and Comparative Examples 1 to 2 100 g of the polymer synthesized in Synthesis Example 1 was mixed with calcium carbonate (trade name: CCR, manufactured by Shiraishi Kogyo KK) as a filler.
0g, titanium dioxide (trade name R82, manufactured by Ishihara Sangyo Co., Ltd.)
0) 20 g, aminosilane (Shin-Etsu Chemical Co., Ltd., trade name KBM602) 2 g as an adhesion promoter, dibutyltin diacetylacetonate (Nitto Kasei Co., Ltd., trade name U-220) 2 g as a curing accelerator, plasticizer Table 1 as monovalent silanol compounds and air oxidation-curable compounds
And 50 g, 2 g and 5 g respectively,
After thoroughly kneading and mixing with three paint rolls,
mm sheet material was produced.

After the obtained sheet was cured at 23 ° C. for one day, two kinds of alkyd paint (Si-Dolland, Netherlands) were used.
(Rubol AZ (trade name, manufactured by Kkens) and Rock Coat (trade name, manufactured by Rock Paint Co., Ltd.)) are separately applied to the surface of the cured product and cured at 23 ° C. for the number of days shown in Table 1. I examined. The results are shown in Table 1 together with the case where no air oxidation curable compound is added.
Shown in

The polyethers in Table 1 have allyl ether groups at both ends.

[0108]

[Outside 3]

The oxypropylene polymer and DOP are di (2-ethylhexyl) phthalate (MW391) manufactured by Daihachi Chemical Co., Ltd.

In addition, 5 in the evaluation in Table 1 indicates that the applied paint is completely cured, 4 indicates that the applied paint is cured, but a little stickiness remains on the surface, and 3 indicates that the finger is applied to the application surface. The paint slightly adheres to the fingertips, 2 is partially cured, but when the finger is applied to the application surface, the paint adheres to the fingertips, 1 is that the applied paint is thickening, and 0 is Indicates no change (uncured) in the paint.

Next, the sheet material obtained in the same manner was
After curing at 3 ° C. for 1 day, it was exposed to the outdoors (45 ° inclination on the south side), and the state of dust adhesion was observed. The results are shown in Table 1 together with the case where no air oxidation-curable compound was added.

In the dust adhesion evaluation in Table 1, ○ indicates that little dust adheres, Δ indicates that dust adheres a little, and X indicates that dust adheres considerably.

[0113] Further, in accordance with JIS A 5758, H
The mold tensile properties (the substrate was glass) were examined. Table 1 shows the results
Shown in

[0114]

[Table 1]

[0115]

The cured product of the curable composition of the present invention, according to the present invention
The use reduces the dust adhesion of this cured product.
Can be made. Furthermore, according to this cured product, the modulus can be kept low, the curability of the alkyd paint applied to the surface can be improved, and the dust adhesion can be reduced .

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) C08L 71/02 C08K 5/103 C08K 5/54

Claims (1)

(57) [Claims] 1. An oxyalkylene polymer 100 having (A) a hydroxyl group and / or a hydrolyzable group bonded to a silicon atom and having at least one silicon-containing group which can be crosslinked by forming a siloxane bond. 0.1 to 20 parts by weight of (B) a compound having one silanol group in the molecule and / or a compound capable of forming a compound having one silanol group in the molecule by reacting with water with respect to parts by weight And (C) a compound containing an air oxidation-curable unsaturated group.
Hydroxide bonded to silicon atom, characterized by adding 1 to 20 parts by weight
Groups and / or hydrolyzable groups,
Less silicon-containing groups that can be crosslinked by forming
Contains at least one oxyalkylene polymer
A method for reducing dust adhesion on the surface of a cured product of a curable composition .