JP3394751B2 - Solvent-free paint composition - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a solventless type which uses a liquid partial hydrolysis-condensation product of organosilane as a main binder, and has an initial drying property, hot water resistance, weather resistance, stain resistance,
The present invention relates to a solventless coating composition capable of forming a coating film having excellent solvent resistance, alkali resistance, crack resistance and the like.

[0002]

2. Description of the Related Art In recent years, organopolysiloxane inorganic coatings containing organosilane and / or its partial hydrolyzed condensate as a binder have attracted attention because they form coating films excellent in weather resistance and stain resistance. Is starting to appear. However, such a paint generally contains a large amount of an organic solvent in order to dissolve and disperse the film-forming material and to impart fluidity. However, the organic solvent is highly flammable and has been designated as a hazardous material handling specification. Therefore, sufficient management is required, and further, it is not preferable from the viewpoint of air pollution and resource saving. Therefore, for example, Japanese Patent Publication No. 7-72250
In the official gazette, a coating material containing no organic solvent has been developed, but the coating material has a problem that the initial drying property is slower than that of an organopolysiloxane inorganic coating material containing an organic solvent. Further, the organopolysiloxane-based inorganic coating film has a problem that it is generally high in hardness and easily cracks, and in order to improve it, a coating using an organic-inorganic composite resin as a binder has been developed. However, there is a problem in that a large amount of organic solvent is blended and the weather resistance and stain resistance of the obtained coating film are inferior to those of the organopolysiloxane inorganic coating material.

[0003]

The present invention has been made against the background of such problems of the prior art. By using a specific liquid organopolysiloxane inorganic resin and an organic silicon compound, a solventless type is obtained. , And the initial dryness,
An object of the present invention is to provide a room temperature curable solventless coating composition capable of forming a coating film excellent in hot water resistance, weather resistance, stain resistance, crack resistance and the like.

[0004]

Means for Solving the Problems The present inventors have
In order to achieve the
And found that the above problems can be achieved, and reached the present invention.
It was done. That is, the present invention is (I) General formula (1) R¹ _nSi (OR²)_4-n[In the formula, R¹Is
R is an organic group having 1 to 8 carbon atoms,²Has 1 to 5 carbon atoms
It is an alkyl group, and n is 1 or 2. ]
100 parts by weight of liquid partial hydrolysis-condensation product of organosilane
Department, (II) The ketiimide group and the addition directly bonded to the silicon atom.
Organosilicon compound having water-decomposable group 0.5 to 20
Parts by mass, and (III) General formula (2) R¹ _nSi (OR²)_4-n[In the formula, R
¹Is an organic group having 1 to 8 carbon atoms, R²Has 1 to 1 carbon atoms
5 is an alkyl group, and n is 1 or 2. ]]
Organosilane compound 0 to 50 parts by mass,(IV) Epoxy group and hydrolyzed directly bonded to silicon atom.
Organosilicon compound having decomposable group 0.5 to 10 quality
Quantity part and, if necessary, (V) Liquid thermoplastic organic polymer compound 5 to 50 parts by mass,
The present invention relates to a solventless coating composition containing

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. Each component of the solventless coating composition of the present invention will be described. Regarding Component (I) The component (I) is represented by the general formula (1) R ¹ _n Si (OR ² ) _4-n [wherein R ¹ is an organic group having 1 to 8 carbon atoms, and R ² is 1 to 1 carbon atoms]. 5 is an alkyl group, and n is 1 or 2. ] It is a liquid partial hydrolysis-condensation product of the organosilane shown by these. In the above formula, examples of the organic group as R ¹ include an alkyl group, a cycloalkyl group, an aryl group, a vinyl group and the like. Here, the alkyl group may be linear or branched. Examples of the alkyl group include methyl group, ethyl group, n-propyl group, i-propyl group, n
Examples thereof include alkyl groups such as -butyl group, i-butyl group, s-butyl group, t-butyl group, pentyl group, hexyl group, heptyl group and octyl group. A preferred alkyl group is
It has 1 to 4 carbon atoms.

Preferable examples of the cycloalkyl group include a cyclohexyl group, a cycloheptyl group, a cyclooctyl group and the like. As the aryl group, for example,
Examples thereof include a phenyl group. Each of the above functional groups may optionally have a substituent. Examples of such a substituent include a halogen atom (for example, a chlorine atom, a bromine atom, a fluorine atom, etc.), a (meth) acryloyl group, a mercapto group, an alicyclic group and the like. The alkyl group as R ² may be linear or branched. Examples of such an alkyl group include a methyl group, an ethyl group,
n-propyl group, i-propyl group, n-butyl group, i-
A butyl group, an s-butyl group, a t-butyl group, a pentyl group and the like can be mentioned, and a preferable alkyl group has 1 to 2 carbon atoms.
It belongs to an individual.

Specific examples of the organosilane represented by the above formula (1) include, for example, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n. -Propyltriethoxysilane, i-
Propyltrimethoxysilane, i-propyltriethoxysilane, γ-chloropropyltrimethoxysilane, γ
-Chloropropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 3,3,3-
Trifluoropropyltrimethoxysilane, 3,3,3
-Trifluoropropyltriethoxysilane, cyclohexyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, phenyltrimethoxy Examples include silane, phenyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, methylphenyldimethoxysilane, and dimethyldipropoxysilane.
Preferred are methyltrimethoxysilane, methyltriethoxysilane, phenyltrimethoxysilane, and dimethyldimethoxysilane.

Component (I) is one of these organosilanes.
It is a single species or two or more species of partial hydrolysis-condensation products. The condensate is liquid at room temperature and has a polystyrene-equivalent weight average molecular weight of, for example, 300 to 5,000, preferably
Those of 500 to 4200 are suitable. By using such a condensate, a coating film having good storage stability and good adhesion can be obtained. The liquid partial hydrolysis-condensation product of organosilane used in the present invention has a viscosity of 0.1.
-10P (poise) / 20 ° C, preferably 1-7P / 2
A temperature of 0 ° C is suitable. If the viscosity is lower than the above range, the storage stability of the coating composition tends to deteriorate, and conversely if the viscosity is too high, the coating workability tends to deteriorate. However, it is also possible to use the partially hydrolyzed condensate of organosilane which is solid at room temperature together with the component (I) by using together with the organosilane compound as the component (III) described later.

As a method for producing the component (I), the organosilane represented by the formula (I) is hydrolyzed and condensed in the presence of water and a catalyst. An appropriate amount of water is such that 30 to 90%, preferably 50 to 80%, of the hydrolyzable groups initially present in the organosilane can be hydrolyzed and condensed. Further, examples of the catalyst include inorganic acids such as nitric acid and hydrochloric acid, and organic acids such as acetic acid, formic acid, and propionic acid. An appropriate amount of the catalyst added is such that the pH of the organosilane added with water is 3 to 6. The hydrolysis-condensation reaction is carried out, for example, in the presence of water and a catalyst at 40 to 8
2-10 at a temperature of 0 ° C, preferably 45-70 ° C.
A method of carrying out a partial hydrolysis-condensation reaction while stirring for a suitable time is suitable, but not limited to this method. After completion of the reaction, the alcohol component generated in the reaction is desolvated by means such as heating and / or pressure reduction to produce the component (I).

The component (I) is composed of an organosilane having a value of n of 1 in the above formula (1) and / or a partially hydrolyzed condensate (I-1) thereof and an organosilane having a value of n of 2. as well as/
Alternatively, the mass ratio with the partial hydrolysis-condensation product (I-2) is 5
0:50 to 100: 0, preferably 60:40 to 9
The partial hydrolyzate obtained from the 5: 5 mixture reacts stably when reacted, and a coating film with good crack resistance is obtained, which is desirable. As a specific example of such a condensate, SR2 manufactured by Toray Dow Corning Co., Ltd. is commercially available.
402, DC3037, DC3074; Shin-Etsu Chemical Co., Ltd. KR-211, KR-212, KR-213,
KR-214, KR-216, KR-218; TSR-145, TSR-160, TS manufactured by Toshiba Silicone Co., Ltd.
R-165, YR-3187 etc. are mentioned.

Component (II) Component (II) is a hydrolytically condensable alkoxysilane having a ketyimide group in the molecule, and is mainly added to improve the initial drying property. The component (II) includes, for example, a primary amino group-containing alkoxysilane compound represented by the following general formula (a) and a ketone compound represented by the following general formula (b) at a temperature of 100 to 150 ° C., for example. A typical example is the compound represented by the following general formula (c), which is obtained by a dehydration condensation reaction with stirring for 2 to 5 hours. Formula _{(a) H 2 N- (CH} 2) m -Si (R 3) n (OR 4) (3-n) Formula ^{(b) R 5 -CO-R} 6 Formula (c) (R ^{5 ) (R 6) C = N-} (CH 2) m -Si (R 3) n (OR 4)
_(3-n)

In the general formula (a), the general formula (b) and the general formula (c), R ³ is an organic group having 1 to 8 carbon atoms similar to R ¹ in the formula (1). , R ⁴ , R ⁵ and R ⁶ are the same alkyl groups having 1 to 5 carbon atoms as R ² in the formula (1), m is an integer of 1 to 5, and n is 1 or 0. Is. Specific examples of the primary amino group-containing alkoxysilane compound represented by the general formula (a) include γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, β-aminoethyltrimethoxysilane,
β-aminoethyltriethoxysilane, γ-aminopropylmethyldimethoxysilane, γ-aminopropylmethyldiethoxysilane, γ-aminopropylmethyldipropoxysilane, γ-aminobutylphenyldimethoxysilane, γ-aminobutylphenyldiethoxysilane , Γ
Typical examples include -aminopropyldimethylmethoxysilane and γ-aminopropyldiethylmethoxysilane.

Representative examples of the ketone compound represented by the above general formula (b) include acetone and aliphatic ketones such as methyl ethyl ketone, methyl isobutyl ketone, and dibutyl ketone. Also,
As the ketone compound, in addition to the compound represented by the general formula (b), cyclobutanone, alicyclic ketone such as cyclohexanone and cyclopentanone, or acetophenone, and aromatic ketone such as propiophenone can be used. The compounding amount of the component (II) is 100 parts by mass of the partially hydrolyzed condensate of the organosilane which is the component (I).
0.5 to 20 parts by mass, preferably 1 to 15 parts by mass is suitable. Incidentally, when the component (II) is less than the above range,
The initial drying property of the obtained coating film tends to deteriorate, and conversely, if it is too large, crack resistance and the like tend to deteriorate, which is not preferable.

Component (III) Component (III) is mainly added to reduce the viscosity of the coating composition and improve the coating workability. (III)
The component is represented by the general formula (2) R ¹ _n Si (OR ² ) _4-n [wherein R
¹ is an organic group having 1 to 8 carbon atoms, and R ² is 1 to 1 carbon atoms.
5 is an alkyl group, and n is 1 or 2. ] An organosilane compound represented by the formula [1] and is the same as the organosilane compound represented by the general formula (1) described in the component (I). As the component (III), one type of these organosilanes may be used alone, or two or more types may be used in combination.

The component (III) is essential if the component (I) has a low viscosity.
Although it is not necessary to add sushi, the usual amount is (I)
Partially hydrolyzed condensate of organosilane which is a component 100
0 to 50 parts by weight, preferably 5 to 40 parts by weight based on parts by weight
The quantity part is appropriate. The component (III) is more than the above range.
If it is too large, the storage stability of the paint tends to deteriorate, so it is preferable.
Not good.About (IV) ingredient Component (IV) is mainly the initial dryness, hot water resistance, solvent resistance
It is added to improve the properties and the like. (IV) ingredient
As specific examples of, for example, γ-glycidoxypropyl
Trimethoxysilane and γ-glycidoxypropyltri
Ethoxysilane, γ-glycidoxypropyl methyl dime
Toxysilane, γ-glycidoxypropylmethyldiet
Xysilane, γ-glycidoxypropyltriisopropene
Nyloxysilane, γ-glycidoxypropyltriimi
Nooxysilane, β- (3,4-epoxycyclohexyl)
) Ethylmethyldimethoxysilane, γ-isocyanate
Topropyltriisopropenyloxysilane and glycid
A typical example is an adduct with a polyol. (I
The compounding amount of component (V) is the same as that of component (I), organosila.
100 parts by mass of the partial hydrolysis-condensation product of0.5~
10 parts by mass, preferably 0.5 to 7 parts by mass is suitable.
It If the amount of component (IV) is more than the above range, the weather resistance
It is not preferable because it tends to deteriorate.

Component (V) The component (V) is added mainly to impart adhesion and flexibility to the coating film and improve crack resistance. The component (V) is a thermoplastic organic polymer compound which is liquid at room temperature and compatible with the component (I). Examples of such a thermoplastic organic polymer compound include acrylic resin and polyester resin. The blending amount of the component (V) is 0 to 50 parts by mass, preferably 5 to 30 parts by mass, relative to 100 parts by mass of the partial hydrolysis-condensation product of the organosilane which is the component (I). If the amount of component (V) is more than the above range, weather resistance and the like tend to deteriorate, which is not preferable.

The coating composition of the present invention has the above-mentioned (I).
Component, (II) component, and optionally blended (III) component, consisting of (IV) component and (V) component, further, if necessary, a filler, a dye, and also a curing accelerator, It is composed of various additives such as a thickener and a pigment dispersant. Examples of the filler include talc, barium carbonate, calcium carbonate, barium carbonate, bentonite,
Various extender pigments and color pigments for paints such as titanium oxide, carbon black, red iron oxide, and lithopone can be used. The amount of the filler compounded is 0 to 70% by mass, preferably 0 to 50% by mass, based on the solid content of the coating composition.

Typical examples of the curing accelerator include ethylenediamine and amine compounds such as diethylenetriamine, piperidine, phenylenediamine and triethylamine. The coating composition of the present invention is applied to the surface of an object to be coated with a coating means such as a brush, spray, roll or dipping, and baked at room temperature or at a temperature of 300 ° C. or less to form a cured coating film. It is possible. As the article to be coated, inorganic ceramic substrates, various metal substrates such as stainless steel and aluminum, glass substrates, plastic substrates and paper substrates can be used.

[0019]

EXAMPLES The present invention will now be described in more detail with reference to examples. In the examples, “parts” and “%” are based on mass unless otherwise specified.

Synthesis Example 1 75 parts of methyltrimethoxysilane and 2 parts of dimethyldimethoxysilane were placed in a reactor equipped with a reflux condenser and a stirrer.
After 5 parts were added and mixed, 5 parts of ion-exchanged water and 0.05 part of 1N hydrochloric acid were added, and a partial hydrolysis condensation reaction was carried out at 70 ° C. for 5 hours. After the reaction was completed, the pressure was reduced (133 × 10 ² P
The solvent was removed under a (100 Torr) to obtain a liquid organopolysiloxane (A) having a weight average molecular weight of 2500 and a viscosity of 2.0 P / 20 ° C.

Synthesis Example 2 20 parts of methyltrimethoxysilane, 30 parts of phenyltrimethoxysilane and 50 parts of dimethyldimethoxysilane were added to a reactor equipped with a reflux condenser and a stirrer, mixed, and then ion-exchanged water 10 was added. Parts and 0.1N hydrochloric acid
A partial hydrolysis and condensation reaction was carried out at 60 ° C. for 8 hours.
After completion of the reaction, reduced pressure [133 × 10 ² Pa (100 Tor
r)] was removed under reduced pressure to obtain a liquid organopolysiloxane (B) having a weight average molecular weight of 3700 and a viscosity of 5.0 P / 20 ° C.

Synthesis Example 3 A partial hydrolysis condensate of methyltrimethoxysilane (trade name “SR2402” manufactured by Toray Dow Corning Co., Ltd .; solid content 100) was added to a reactor equipped with a reflux condenser and a stirrer.
%), And a partial hydrolysis-condensation product consisting of a mixture of phenyltrimethoxysilane and dimethyldimethoxysilane (trade name “DC307, manufactured by Toray Dow Corning Co., Ltd.”
4 "; solid content 100%) 15 parts, methyltrimethoxysilane 10 parts, phenyltrimethoxysilane 25 parts and dimethyldimethoxysilane 15 parts, and after mixing, 2 parts ion-exchanged water and 1N hydrochloric acid 0.05 part was added and a partial hydrolysis condensation reaction was carried out at 50 ° C. for 7 hours. After completion of the reaction, reduced pressure [133 × 10 ² Pa (100 Tor
r)] was removed under reduced pressure to obtain a liquid organopolysiloxane (C) having a weight average molecular weight of 3000 and a viscosity of 3.0 P / 20 ° C.

Synthesis Example 4 In a reactor equipped with a reflux condenser and a stirrer, 20 parts of trade name "SR2402" manufactured by Toray Dow Corning Co., Ltd. and partial hydrolysis consisting of a mixture of phenyltrimethoxysilane and dimethyldimethoxysilane were used. Decomposition condensate (trade name “DC3037, manufactured by Toray Dow Corning Co., Ltd .; solid content 100
% ", A partial hydrolysis condensate of phenyltrimethoxysilane (trade name" KR-21 manufactured by Shin-Etsu Chemical Co., Ltd. "
7 "; solid content 100%), 10 parts of methyltrimethoxysilane and 10 parts of phenyltrimethoxysilane.
After adding and mixing parts, 5 parts of ion-exchanged water and 1 part of 1N hydrochloric acid were added, and a partial hydrolysis-condensation reaction was carried out at 45 ° C. for 12 hours. After completion of the reaction, reduced pressure [133 × 10 ² Pa (100
Torr)] under which the solvent is removed to obtain a weight average molecular weight of 400.
An organopolysiloxane (D) having a viscosity of 7.0 P / 20 ° C. was obtained.

Synthesis Example i In a reflux condenser equipped with a water divider and a reactor equipped with a stirrer,
100 parts of γ-aminopropyltriethoxysilane was added, and methyl isobutyl ketone 45.5 was added while stirring.
After adding parts, the temperature was raised to 135 ° C., the temperature was maintained for 3 hours, and the reaction was carried out to obtain an organosilicon compound (a) having a ketyimido group. Synthesis Example ii In a reflux condenser equipped with a water divider, a reactor equipped with a stirrer,
100 parts of γ-aminopropylmethyldiethoxysilane was added, and methyl isobutyl ketone 45.
After adding 5 parts, the temperature was raised to 135 ° C., the temperature was maintained for 3 hours, and the reaction was performed to obtain an organosilicon compound (b) having a ketyimido group.

[0025]Example 1 and Comparative Example 1-7 Components (I) to (V) are mixed in the proportions shown in Table 1 and solventless coating is applied.
An ingredient composition was prepared.

[0026]

[Table 1]

Note 1) Acrylic resin (Mitsubishi Rayon Co., Ltd.)
Product name) Note 2) Polyester resin (Kuraray Co., Ltd. product name) The storage stability test of the obtained solventless coating compositions of Example 1 and Comparative Examples 1 to 7 and coated plates were prepared as follows. , Initial dryness, coating film appearance, hardness, hot water resistance, stain resistance, alkali resistance, weather resistance, crack resistance, each coating performance test,
The results are shown in Table 2.

<Storage Stability Test> Each solventless coating composition was stored at 50 ° C. for one month, and then the change in viscosity and the appearance of the solventless coating composition were visually examined. Evaluation criteria ○ ・ ・ ・ No change △ ・ ・ ・ Thickening × ・ ・ ・ Gelification, precipitate generation <Initial drying property> A glass plate was coated with a 6 mil applicator, dried at room temperature, and hardened over time (JIS K 54
(Pencil hardness measured by 00).

<Film coating performance test> A gypsum slag perlite plate (thickness: 12 mm) was used as a material, and a polyisocyanate prepolymer solution sealer "V Seran # 1" was used on the surface thereof.
00 sealer "(trade name of Dainippon Paint Co., Ltd.) (100% diluted with a solution of butyl acetate: xylene = 1: 1) is spray-coated so that the applied amount is 90 to 100 g / m ² (wet mass). did. This was dried at 100 ° C. for 5 minutes. Then, as a base paint, an acrylic silicone resin-based paint "V-Celan # 500 Enamel" (trade name, manufactured by Dainippon Paint Co., Ltd.) (butyl acetate: xylene = 1: 1 solution)
0% dilution) was applied by spraying so that the applied amount was 80 to 90 g / m ² (wet mass). 15 at 120 ℃
Dry for minutes. Then, the coating composition shown in Table 1 was spray-coated so that the applied amount was (130 ± 10) g / m ² (wet mass). A coated plate (A) dried at 20 ° C. for one week and a coated plate (B) dried at 80 ° C. for 12 minutes and further dried at room temperature for 3 days were prepared. The above test was performed on the obtained coating film. The test method and evaluation criteria were as follows.

Appearance: The appearance of the coating film formed on the coated plate was visually judged. Evaluation criteria ○ ・ ・ ・ No cracks were generated △ ・ ・ ・ Minor cracks or turbidity or spots × ・ ・ ・ Significant cracks, turbidity or spots Hardness: Pencil hardness measured according to JIS K 5400 Hot water resistance: Coated plate at 80 ° C It was immersed in water and the appearance abnormality of the coating film was visually determined.

Evaluation criteria ○ ・ ・ ・ No change △ ・ ・ ・ Minor changes such as decrease in gloss and whitening × ・ ・ ・ Changes such as decrease in gloss and whitening Large stain resistance: Apply red and black magic ink 24 hours later, the cloth was wiped with a cloth wet with n-butanol, and the decontamination property was visually evaluated. Evaluation criteria ◎ ・ ・ ・ Complete removal ○ ・ ・ ・ Extremely slight pollution △ ・ ・ ・ Slight contamination × ・ ・ ・ Remarkable contamination

Weather resistance: Sunshine weather-O-meter 3000 hour evaluation standard ○: No change in appearance of coating film, gloss retention rate of 95% or more △: slight change in appearance of coating film, gloss retention rate of 80 ~
94% x ... Remarkable change in coating film, gloss retention rate of less than 80% Alkali resistance: 4 of each coated plate in saturated slaked lime alkali aqueous solution
After soaking at 0 ° C. for 10 days, the coating film surface was visually evaluated. Evaluation criteria ○ ・ ・ ・ No change △ ・ ・ ・ Slight turbidity on film surface × ・ ・ ・ Sky turbidity on coating film surface

Crack resistance: Evaluation criteria of ASTM-C666A method ⊙ No cracks ∙ Minor cracks ∙ Cracks or partial peeling of coating film × Occurrence, film peeling

[0034]

[Table 2]

As is clear from Table 2, Example 1 which is the solventless coating composition of the present invention had good storage stability and excellent coating film performance. On the other hand, in Comparative Example 6 in which the ketyimido group-containing alkoxysilane compound was not mixed, the storage stability was good, but the initial dryness, hardness, hot water resistance, stain resistance, alkali resistance, and weather resistance were poor.
Further, in Comparative Example 7 in which a large amount of the ketiimide group-containing alkoxysilane compound was blended, the storage stability was poor, and the crack resistance and alkali resistance were poor.

[0036]

The coating composition of the present invention is solvent-free, has good storage stability, initial drying property, hot water resistance, stain resistance, alkali resistance, weather resistance, crack resistance, etc. An excellent coating film can be formed.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuyoshi Tsuneta 1-981 Shimonagata, Nishinasuno-cho, Nasu-gun, Tochigi Prefecture (56) References JP-A-7-278497 (JP, A) JP-A-3-3163 (JP, A) JP-A-2-153963 (JP, A) JP-A-9-299874 (JP, A) JP-A-8-127712 (JP, A) JP-A-5-247347 (JP, A) JP-A 2000- 169789 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) C09D 183/00-183/16 C08L 83/00-83/16

Claims (3)

(57) [Claims] 1. (I) General formula (1) R¹ _nSi (OR²)_4-n
[In the formula, R¹Is an organic group having 1 to 8 carbon atoms, R²Is
It is a C1-C5 alkyl group, n is 1 or 2.
It ] Liquid partial hydrolysis condensation of organosilane represented by
100 parts by mass of compound, (II) The ketiimide group and the addition directly bonded to the silicon atom.
Organosilicon compound having water-decomposable group 0.5 to 20
Mass part, (III) General formula (2) R¹ _nSi (OR²)_4-n[In the formula, R
¹Is an organic group having 1 to 8 carbon atoms, R²Has 1 to 1 carbon atoms
5 is an alkyl group, and n is 1 or 2. ]]
Organosilane compound 0 to 50 parts by mass,as well as (IV) Epoxy group and hydrolyzed directly bonded to silicon atom.
Organosilicon compound having decomposable group 0.5 to 10 quality
Quantity part, A solventless coating composition comprising: 2. The solventless coating composition according to claim 1, further comprising (V) 5 to 50 parts by mass of a liquid thermoplastic organic polymer compound. 3. The liquid partially hydrolyzed condensate of organosilane as the component (I) has a viscosity of 0.1 to 10 P / 20.
The solventless coating composition according to claim 1 or 2, which has a temperature of 0 ° C.