JPH0124423B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a film-forming material composition, and more particularly to a film-forming material composition capable of forming a colored film with excellent dust resistance on the surface of a silicone elastomer. Various types of polyorganosiloxane compositions that cure at room temperature to become rubber-like elastic bodies are known. For example, a polydiorganosiloxane whose both ends are blocked with silanol groups is hydrolyzed with an acetoxy group, an alkoxy group, a dialkylketoxime group, a dialkylamino group, a dialkylaminoxy group, an N-methylamide group, etc., which are bonded to the silicon atom. Polyorganosiloxane compositions using organosilicon compounds having such groups as crosslinking agents are widely used in the construction industry, automobiles, electrical equipment, and other industries. In the construction industry, this composition is collectively called silicone sealant, and is widely used for waterproof sealing of voids in building wall materials such as concrete and aluminum plates, for fixing glass to sash, and for adhering glass to glass. Silicone sealants have particularly excellent weather resistance, durability, heat resistance, and cold resistance, their physical properties do not change much due to temperature, they do not deteriorate due to ozone or ultraviolet rays, and they have good workability during installation, so they are used in high-rise buildings and other applications. Demand is increasing. In addition, in recent years, polyorganosiloxane with this type of crosslinking mechanism has been applied to roofs and walls to form a silicone elastic layer with excellent waterproof and weather resistance, and its use as a coating material has begun in recent years. In addition to the above-mentioned characteristics, these architectural coating materials must be able to be mixed into any color tone to match the design of the building, and must also be able to resist discoloration and staining over a long period of time. It is required that no occurrence occurs. However, although silicone elastomers generally have the excellent properties mentioned above, they tend to attract dust because the main component, polydiorganosiloxane, is a dielectric, and polysiloxane, which does not participate in crosslinking, tends to absorb dust. The elastic material oozes out from the inside of the elastic body to the surface, covering the dust and making it water repellent, which has the disadvantage that the dust is not washed away by rainwater, resulting in significant staining. Furthermore, since various inorganic powders are used as fillers for the purpose of imparting physical properties and workability, it has not always been possible to adjust the color to any desired color tone. In order to prevent such contamination,
Previously, the present inventors discovered an organosilicon compound containing an organoaminoxy group and a SiO ₂ unit and R ¹ ₃ SiO _1/2
a mixture or condensation reaction product of a benzene-soluble polyorganosiloxane and a silanol end-capped polydiorganosiloxane,
By dissolving a volatile organosilicon compound and a hydrocarbon solvent to obtain a coating film forming material, and applying this to a silicone elastomer, a transparent coating film with excellent dust resistance can be formed on the surface thereof. (Japanese Patent Application Laid-open No. 162763/1983). The present inventors further attempted to disperse coloring pigments in this material for the purpose of coloring the coating film. However, coating film forming materials to which pigments have been added have been unable to form a uniform coating film due to significant pigment separation during coating, and satisfactory results have not been obtained. The object of the present invention is to provide a coating film-forming material composition that does not have the above-mentioned drawbacks. The present inventors have conducted intensive studies on a method for preventing the separation of the pigment described above and forming a uniform coating film without uneven color. As a result, the present inventors have found that an organosilicon compound containing an organoaminoxy group, a SiO ₂ unit, and an R ¹ A coating comprising a mixture or condensation reaction product of a polyorganosiloxane consisting of ₃ SiO _1/2 units and a silanol group-terminated polydiorganosiloxane, a mixed solvent of a volatile organosilicon compound and a hydrocarbon solvent, and a coloring pigment. The present inventors have discovered that the object can be achieved by further adding fumed silica surface-treated with an organosilicon compound to the film-forming material, and have completed the present invention. That is, the coating film forming material composition of the present invention comprises: (A) 100 parts by weight of an organosilicon compound having an average number of organoaminoxy groups exceeding two in the molecule; (B) (a) SiO ₂ units and the following: Formula: R ¹ ₃ SiO _1/2 ( _wherein ^{R 1} represents the same or different monovalent substituted or unsubstituted hydrocarbon _group )
0.4 to 1.0 mol exists per 1 mol of SiO ₂ units,
100 parts by weight of a polyorganosiloxane in which 0.0004 to 1 hydroxyl group is bonded to each silicon atom, and (b) 10 to 10 parts by weight of a silanol group-terminated polydiorganosiloxane having a viscosity of 30 to 2,000,000 cSt at 25°C.
10 to 1000 parts by weight of a mixture with 1000 parts by weight or a condensation reaction product thereof (based on 100 parts by weight of (A)); (C) 5 parts by weight based on 100 parts by weight of the total amount of (A) and (B) ~500 parts by weight of colored pigment; (D)(a) Formula: R ² ₄ Si, R ³ ₃ SiO (R ⁴ ₂ SiO) mSiR ³ ₃ , R ⁵ Si (OSiR ⁶ ₃ ) ₃ or (R ⁷ ₂ SiO)n (wherein R ² to ^{R 7} may be the same or different and each represents a hydrogen atom or an alkyl group; m represents 0 or a positive integer, and n represents an integer of 3 or more) It consists of a volatile organosilicon compound whose boiling point under normal pressure is in the range of 70 to 250°C, and (b) a hydrocarbon solvent, and the total amount of (a) and (b) is (A) to ( C) total amount
A mixed solvent whose amount is 20 to 500 parts by weight per 100 parts by weight, and the amount of (a) is 5% by weight or more of the total amount of (A), (a) and (b); and (E) (A ) to 0.1 parts by weight or more based on 100 parts by weight of the total amount of (D), and 30 parts by weight or less based on 100 parts of the total amount of (A) and (B), and the organosilicon compound It is characterized by being made of fumed silica whose surface has been treated with The present invention will be explained in more detail below. The aminoxy group-containing organosilicon compound (A) includes:
Included are silane derivatives and linear, cyclic or branched siloxane derivatives. Examples of organic groups bonded to silicon atoms include alkyl groups such as methyl, ethyl, propyl, butyl, and hexyl groups;
Examples include aryl groups such as phenyl groups. In addition, it is necessary to have an average number of organoaminoxy groups in one molecule exceeding two, and a film is formed within a short time after application, resulting in a film with better stain prevention properties. average 2.5
It is preferable to have at least one. Examples of organic groups bonded to organoaminoxy groups include methyl group,
Examples include monovalent hydrocarbon groups such as ethyl group, propyl group, butyl group, and cyclohexyl group; and divalent hydrocarbon groups such as tetramethylene group and pentamethylene group. Of these, due to the ease of obtaining raw materials, ease of synthesis, reactivity, and ease of volatilization of the organohydroxylamine released,
Preferably it is an ethyl group. Examples of such organoaminoxy group-containing organosilicon compounds include the following. Hereinafter, for the sake of simplicity, the following abbreviations will be used for each organosilicon compound. (Abbreviation) Me: methyl group, Et: ethyl group, Bu: butyl group, Vi: vinyl group, Ph: phenyl group Si(ONEt ₂ ) ₄ , MeSi(ONEt ₂ ) ₃ , PhSi
(ONME ₂ ) ₃ , PhSi(ONEt ₂ ) ₃ ,

[Formula] Et ₂ NOMe ₂ SiSiMe ₂ ONEt ₂ ,
Et ₂ ONMe ₂ SiOSiMe ₂ ONEt ₂ ,
Et ₂ NOMe ₂ SiOPh ₂ SiOSiMe ₂ ONEt ₂ ,

【formula】

【formula】

【formula】

【formula】

【formula】

[Formula] MeSi [OMe ₂ SiONEt ₂ ] ₃ , PhSi [OMe ₂ SiONEt ₂ ] ₃ (B) The polyorganosiloxane of (a) consists of SiO ₂ units and R ¹ ₃ SiO _1/2 units (R ¹ is the same as above). (having the same meaning) and has a relatively low molecular weight. Usually benzene-soluble polyorganosiloxanes are used. As R ¹ , alkyl groups such as methyl group, ethyl group, propyl group, butyl group, amyl group, hexyl group, octyl group, decyl group; alkenyl group such as vinyl group; aralkyl group such as β-ethylphenyl group; phenyl Examples include aryl groups such as groups; and those in which some of these hydrogen atoms are substituted with chlorine atoms, fluorine atoms, nitrile groups, etc. Among these, from the viewpoint of easy synthesis, good weather resistance, and reactivity with (b), it is preferable that 90 mol% or more of R ¹ is a methyl group, and all of R ¹ is a methyl group. More preferably, it is a group. The amount of R ¹ ₃ SiO _1/2 units is between 0.4 and 1.0 mol per 1 mol of SiO ₂ units. If the amount of R ¹ ₃ SiO _1/2 units is small, benzene-soluble low molecular weight products can be stably obtained. It tends to gel during synthesis or storage, forming an insoluble and infusible polymer. Also R ¹ ₃
If there are too many SiO _1/2 units, the reactivity will be low when condensing with the silanol-terminated polydiorganosiloxane (b), making it difficult to obtain a composition capable of forming a film with sufficient dustproofing effect and high toughness. . Further, the polyorganosiloxane (a) must have 0.0004 to 1 hydroxyl group bonded to silicon atoms per silicon atom. Such polyorganosiloxanes include alkyl silicates such as ethyl silicate and propyl silicate, partial condensates thereof, silicon tetrachloride,
Co-hydrolyzing a tetrafunctional silicon-containing compound selected from water glass and water glass with a triorganochlorosilane such as trimethylchlorosilane, dimethylvinylchlorosilane, dimethylphenylchlorosilane in the presence of a solvent and producing by-products by conventional means. obtained by removing . The solvent used in this case is usually a hydrocarbon such as benzene, toluene, xylene, gasoline, n-hexane, or n-heptane. (B) The silanol-terminated polydiorganosiloxane of (b) has a substantially chain-like siloxane skeleton and is preferably 30 to 2,000,000 cSt at 25°C.
A material having a viscosity of 1,000 to 200,000 cSt is used. If the viscosity is less than 30 cSt, the resulting film will have poor toughness and flexibility.
If it exceeds 2,000,000 cSt, the viscosity of the composition increases, impeding workability. The organic group bonded to the silicon atom is exemplified by the same one as R ¹ in (a), and it is important to consider the balance between the viscosity of the composition and the required physical properties, and to quickly perform the condensation reaction with the polyorganosiloxane in (a). The intermediate product can be easily obtained industrially, and it can be cured quickly at room temperature in places that are difficult to heat when forming dustproof films on joint sealants and surface coatings of buildings. It is preferable that all of them are methyl groups because they also have UV resistance. However, depending on the use and required properties, phenyl groups may be introduced in an amount up to 20 mol %, and vinyl groups may be introduced in an amount up to 10 mol %. The polyorganosiloxane (a) and the silanol-terminated polydiorganosiloxane (b) may be used in the form of a simple mixture, or may be co-condensed beforehand. Cocondensation is carried out by mixing the two and heating preferably in the presence of caustic potash, caustic soda or an organic peroxide. The polyorganosiloxane (a) is usually obtained as a hydrocarbon solution with a solid content of 30 to 60% by weight, but if necessary, a solvent may be added.
It can also be obtained by then adding the silanol-terminated polydiorganosiloxane (b) and heating this mixed system. The solvent used is preferably a hydrocarbon solvent, with toluene or xylene being particularly preferred. The heating temperature is preferably between 80 and 150℃,
In particular, it is advantageous to utilize the reflux temperature of the added solvent in terms of temperature control. This condensation reaction may be continued until completion, or may be stopped in a state of partial condensation. The blending ratio of component (a) and component (b) is 10 to 1000 parts by weight, preferably 20 to 500 parts by weight, of (b) to 100 parts by weight of (a). The reason for this is that if the amount of (b) is more than 1000 parts by weight, the required dustproof effect cannot be obtained, and if it is less than 10 parts by weight, the flexibility and toughness of the film will decrease. The amount of (B) to (A) is (B) to 100 parts by weight of (A).
The amount is 10 to 1000 parts by weight, preferably 25 to 500 parts by weight. The reason for this is that if the amount of (B) is more than 1000 parts by weight, the desired dustproof effect cannot be obtained, and if it is less than 10 parts by weight, the flexibility and toughness of the film will decrease. The colored pigment (C) used in the present invention is a component for imparting a desired color tone to the coating film, and may be selected from either inorganic pigments or organic pigments. Examples of inorganic pigments include titanium oxide, carbon black, titanium yellow, chrome green, red iron, and ultramarine blue. Examples of organic pigments include permanent yellow, toluidine red, phthalocyanine blue, and phthalocyanine green. The amount of these color pigments is the total amount of (A) and (B).
The amount ranges from 5 to 500 parts by weight per 100 parts by weight.
The reason for this is that if the amount of (3) is less than 5 parts by weight, the hiding power of the paint film will be insufficient, and if it is more than 500 parts by weight, the flexibility and toughness of the paint film will decrease, and the silicone elastomer will This is because adhesiveness decreases. The mixed solvent (D) used in the present invention is composed of the volatile organosilicon compound (a) and the hydrocarbon solvent (b), and provides uniform wettability to the surface of the silicone elastomer. It is necessary to apply it to. The volatile organosilicon compound in (a) is a silane or siloxane that does not contain unstable groups and has appropriate volatility, in other words, a boiling point of 70 to 250°C.
It is necessary to be within the range of . If the boiling point is lower than 70°C, it will volatilize early during application and will not work effectively, and if it is higher than 250°C, drying properties will be poor and film formation will be delayed. Specifically, silanes such as triethylsilane, dimethyldiethylsilane, and trimethylbutylsilane, linear siloxanes such as hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, and dodecamethylpentasiloxane, and 3-trimethylsiloxy Branched siloxanes such as -1,1,1,3,5,5,5-heptamethyltrisiloxane, hexamethylcyclotetrasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, 1-ethyl-3 ,3,5,5,
Examples include cyclic siloxanes such as 7,7-hexamethylcyclotetrasiloxane. this house,
Methyl-based siloxane is preferred because of its ease of synthesis, and octamethylcyclotetrasiloxane is even more preferred from the standpoint of adequate volatility. The amount of (a) is 5% by weight based on the total amount of (a), (b) and (b).
The content is preferably 10% by weight or more. If the amount of (a) is less than 5% by weight, good wettability to the surface of the silicone elastomer will not be obtained, causing repellency and uneven coating, and a uniform film will not be formed. The hydrocarbon solvent in (b) is benzene, toluene,
Examples include xylene, n-hexane, n-heptane, cyclohexane, and gasoline. Among these, toluene or xylene is preferred from the viewpoint of appropriate volatility, solubility with the condensation reaction product of (A), and ease of handling. The amount of (D) is based on 100 parts by weight of the total amount of (A) to (C).
It ranges from 20 to 500 parts by weight. If the amount of (D) is less than 20 parts by weight, the coating film forming material becomes highly viscous, reducing work efficiency, and the coating film formed is thick, so that the properties of the underlying silicone elastomer are not fully exhibited. Not done. On the other hand, if the amount is more than 500 parts by weight, the film formed in one application will be too thin, and sufficient hiding power and dust-proofing effect will not be obtained, resulting in the need to apply multiple coats, reducing work efficiency. The fumed silica (E) used in the present invention exhibits remarkable thixotropic properties when used in combination with component (A), thereby preventing pigment separation and sagging during application. It is a component that enables the formation of a uniform coating film without uneven color. (E) fumed silica includes hexamethyldisilazane, octamethylcyclotetrasiloxane,
An example is fumed silica whose surface is treated with an organosilicon compound such as polydimethylsiloxane. Non-surface-treated fumed silica or surfaces treated with substances other than organosilicon compounds do not exhibit the desired effect sufficiently, and the coating film does not develop gloss.
It is also inappropriate because it reduces the dustproof effect. (E)
The amount of is at least 0.1 part by weight based on 100 parts by weight of the total amount of (A) to (D), and is not more than 30 parts by weight based on 100 parts by weight of the total amount of (A) and (B). If the amount of (E) is less than this, the expression of thixotropic properties will be incomplete, and the effect of preventing pigment separation and sagging will not be exhibited.On the other hand, if the amount is more than this, the coating film formed will be flexible and strong. Sexuality is impaired. The coating film-forming material of the present invention is normally stored as two components: a component in which (C) and (E) are dispersed in (B) and (D), and a component (A). are mixed and used. When dispersing (C) and (E) in (B) and (D), it is advantageous to use equipment such as a three-roll mill, a ball mill, a sand mill, an attritor, or the like. Further, the coating operation may be performed by any method such as brush coating, roll coating, or spraying. According to the coating film forming material composition of the present invention, it does not contain any filler other than the organosilicon compound-treated fumed silica as a pigment separation inhibitor and the colored pigment.
Vivid color development is possible. In addition, there is no pigment separation during application, and it has low viscosity and thixotropic properties, and has good wettability to the silicone elastomer, so it forms a uniform coating film with no color unevenness on the surface of the silicone elastomer. Moreover, the coating workability is good. Furthermore, the formed coating film has excellent dust resistance and weather resistance, so it can maintain its initial color tone and aesthetic appearance for a long period of time. Therefore, the composition for a paint film forming material according to the present invention is particularly suitable as a paint film forming material that has both coloring and dust-proofing effects for silicone elastic coating materials used on the exterior walls of buildings. The present invention will be explained below with reference to Preparation Examples and Examples. In the examples, all parts indicate parts by weight. Note that the following abbreviations are used below for simplicity. (abbreviation) M: Me ₃ SiO _1/2 unit (monofunctional methylsiloxy unit) D: Me ₂ SiO unit (bifunctional methylsiloxy unit) Q: SiO ₂ unit (tetrafunctional methylsiloxy unit) Benzene-soluble polyorganosiloxane is represented by the following abbreviations. S-1 A 50% toluene solution of a resinous copolymer consisting of Q units and M units, in which the ratio of M units to 1 mol of Q units is 0.65 mol, and the hydroxyl groups are bonded to silicon atoms. S-2 A 50% toluene solution of a resinous copolymer consisting of Q units and M units, in which the ratio of M units to 1 mol of Q units is 0.53 mol, and the hydroxyl groups are bonded to silicon atoms. Preparation Example 1 (Preparation of (B)) 200 parts of S-1 and 100 parts of silanol-terminated polydimethylsiloxane having a viscosity of 100,000 cSt at 25°C
0.005 part of caustic soda was added.
The mixture was stirred and heated under reflux of toluene until the viscosity reached 100,000 cSt. After neutralization and filtration by a conventional method, toluene was added until the solid content reached 50% to obtain a condensation product (hereinafter referred to as B-1). Preparation Example 2 (Preparation of (B)) 200 parts of S-2 and a silanol-terminated polydimethylsiloxane having a viscosity of approximately 50,000 cSt at 25°C.
100 parts were treated in the same manner as in Preparation Example 1 to obtain condensation product B-2 with a solid content of 50%. Preparation Example 3 (Preparation of test specimen) 100 parts of silanol-terminated polydimethylsiloxane with a viscosity of 20,000 cSt at 25°C, 10 parts of fumed silica surface-treated with octamethylcyclotetrasiloxane, 100 parts of finely ground calcium carbonate powder, and oxidized A base compound was obtained by mixing 10 parts of titanium in a kneader. To this, 0.25 parts of dibutyltin dilaurate and 4 parts of methyltris(butanone oxime)silane were sequentially added and mixed under a moisture-blocking condition. Add 100 parts of Kesilon to this, dissolve it, and spread the resulting mixture into a 200 mm x 20
A test specimen (hereinafter referred to as T-1) was obtained by applying the paint onto a mild steel plate with a thickness of 2 mm and 2 mm using a paint brush. After curing at room temperature for 7 days, the film thickness of the silicone elastomer was measured and found to be approximately 0.5 mm thick. Preparation Example 4 (Preparation of Test Body) A base compound was obtained by mixing 100 parts of silanol-terminated polydimethylsiloxane having a viscosity of 5000 cSt at 25°C with 65 parts of finely ground calcium carbonate powder and 10 parts of titanium oxide using a kneader. to this
93% by weight

[Formula] and 7 layers amount%

3.0 parts of a crosslinker mixture consisting of the formula was mixed. In addition, kerosene
100 parts were added to make a liquid, and this was applied to a slate board of 300 mm x 300 mm and thickness of 5 mm using a paint brush to obtain a test specimen (T-2). Preparation Example 5 (Preparation of (E)) 20 parts of fumed silica surface-treated with hexamethyldisilazane was added to 100 parts of kerosene and uniformly dispersed using a sand mill. Below this is E-1
It is written as Preparation Example 6 (Preparation of (E)) 20 parts of fumed silica surface-treated with octamethylcyclotetrasiloxane were added to 100 parts of kerosene and uniformly dispersed using a sand mill. Hereinafter, this will be referred to as E-2. Preparation Example 7 (Preparation of (E)) 20 parts of fumed silica surface-treated with polydimethylsiloxane were added to 100 parts of kerosene and uniformly dispersed using a sand mill. Below this is E-3
It is written as Preparation Example 8 (Preparation of (E)) 20 parts of untreated fumed silica was added to 100 parts of kerosene and uniformly dispersed using a sand mill.
Hereinafter, this will be referred to as E-4. Example 1 100 parts of B-1, 50 parts of rutile titanium oxide,
5 parts of titanium yellow and 0.01 part of carbon black were added and uniformly dispersed using a ball mill. Then, to this, E-1 of Preparation Example 5 and E- of Preparation Example 6
2, and E-3 of Preparation Example 7 is E-4 of Preparation Example 8
Samples 11 to 17 were obtained by adding the volatile organosilicon compounds shown in Table 1, a hydrocarbon solvent, and an aminoxy group-containing siloxane. Fifteen minutes after the preparation of these samples, the viscosity was measured using a B-type rotational viscometer. Thereafter, a doctor blade was used to coat a mild steel plate with a thickness of 0.1, 0.2, and 0.3 mm, and the plate was immediately held vertically to observe the presence or absence of sagging. Next, Samples 11 to 17 were applied to the surface of the silicone elastomer of the test specimen (T-1) prepared in Preparation Example 3, and wettability with respect to the silicone elastomer, pigment separation, and gloss were checked. After that, it was exposed outdoors and the degree of staining was observed. those results first
Also listed in the table. Sample 17 is a comparative example that does not contain fumed silica, Sample 14 is a comparative example in which fumed silica is not treated with an organosilicon compound, and Sample 16 is a comparative example in which no volatile siloxane is added. A test specimen without coating was also exposed as a comparative example. The degree of staining after outdoor exposure was expressed by the brightness value of the sample surface according to the Munsell notation. In addition,
The numerical values indicating the composition in the table represent parts by weight (second to
(same in Table 4).

【table】

[Table] Example 2 B-2 100 parts, 50 parts of rutile titanium oxide,
3 parts of permanent yellow, 0.1 part of red iron oxide, and 0.01 part of carbon black were added and uniformly dispersed using a ball mill. A test was conducted in the same manner as in Example 1 using this. The results are also listed in Table 2. Note that the test specimen T-2 prepared in Preparation Example 4 was used as the test specimen for applying the coating film forming material. Sample 23 is a comparative example in which fumed silica is not surfaced with an organosilicon compound, Sample 28 is a comparative example in which no volatile organosilicon compound is contained, and Samples 26 and 27 contain hydrolyzable groups other than aminoxy groups. This is a comparative example using an organosilicon compound having the following properties, and a test specimen to which no film-forming material was applied was also exposed as a comparative example.

【table】

[Table] Example 3 100 parts of silanol-terminated polydimethylsiloxane with a viscosity of 10,000 cSt at 25°C, 100 parts of rutile titanium oxide, 10 parts of titanium yellow, 0.05 part of red iron,
0.025 part of carbon black and 0.5 part of ultramarine blue were added and homogenized using three rolls to obtain a color masterbatch. 50 copies of this color master batch include S-1.
Sample 31~ by adding 50 parts and the raw materials shown in Table 3
Got 40. Tests similar to those in Example 1 were conducted using these samples, and the results are also listed in Table 3. In addition, the test specimen for applying the coating film forming material is
Test specimen T-1 prepared in Preparation Example 3 was used. Sample 38 is a comparative example in which fumed silica is not surface-treated with an organosilicon compound, sample 40 is a comparative example that does not contain fumed silica, and sample 39 is a comparative example that does not contain volatile silicon compounds. A test specimen without coating was also exposed as a comparative example.

[Table] Example 4 100 parts of silanol-terminated polydimethylsiloxane with a viscosity of 20,000 cSt at 25°C, 100 parts of rutile titanium oxide, 6 parts of titanium yellow, 0.15 parts of red iron,
0.1 part by weight of carbon black was added and homogenized using three rolls to obtain a color masterbatch. Samples 41 to 44 were obtained by adding 50 parts of S-1 and the raw materials shown in Table 4 to 50 parts of this color masterbatch. Tests similar to those in Example 1 were conducted using these samples, and the results are also listed in Table 4. In addition, the sample body for applying the coating film forming material is
Test specimen T-2 prepared in Preparation Example 4 was used.

【table】

【table】

Claims (1)

[Scope of Claims] 1 (A) 100 parts by weight of an organosilicon compound having an average number of more than 2 organoaminoxy groups in the molecule; (B) (a) SiO ₂ units and the following formula: R ¹ ₃ SiO _1/2 (wherein R ¹ represents the same or different monovalent substituted or unsubstituted hydrocarbon group), and the R ¹ ₃ SiO _1/2 unit is
0.4 to 1.0 mol exists per 1 mol of SiO ₂ units,
100 parts by weight of a polyorganosiloxane in which 0.0004 to 1 hydroxyl group is bonded to each silicon atom, and (b) 10 to 10 parts by weight of a silanol group-terminated polydiorganosiloxane having a viscosity of 30 to 2,000,000 cSt at 25°C.
10 to 1000 parts by weight of a mixture with 1000 parts by weight or a condensation reaction product thereof (based on 100 parts by weight of (A)); (C) 5 parts by weight based on 100 parts by weight of the total amount of (A) and (B) ~500 parts by weight of colored pigment; (D)(a) Formula: R ² ₄ Si, R ³ ₃ SiO (R ⁴ ₂ SiO) mSiR ³ ₃ , R ⁵ Si (OSiR ⁶ ₃ ) ₃ or (R ⁷ ₂ SiO)n (wherein R ² to ^{R 7} may be the same or different and each represents a hydrogen atom or an alkyl group; m represents 0 or a positive integer, and n represents an integer of 3 or more) It consists of a volatile organosilicon compound whose boiling point under normal pressure is in the range of 70 to 250°C, and (b) a hydrocarbon solvent, and the total amount of (a) and (b) is (A) to ( C) total amount
A mixed solvent whose amount is 20 to 500 parts by weight per 100 parts by weight, and the amount of (a) is 5% by weight or more of the total amount of (A), (a) and (b); and (E) (A ) to 0.1 parts by weight or more based on 100 parts by weight of the total amount of (D), and 30 parts by weight or less based on 100 parts of the total amount of (A) and (B), and the organosilicon compound A coating film forming material composition comprising fumed silica surface-treated with. 2. The coating film forming material composition according to claim 1, wherein the compound (A) is an organosilicon compound having an average number of organoaminoxy groups in the molecule exceeding 2.5. 3. The coating film forming material composition according to claim 1, wherein the organic group bonded to the organoaminoxy group in (A) is an ethyl group. 4 Claim 1, in which R ¹ is a methyl group
The coating film forming material composition described in 2. 5 (B) The viscosity of the compound of (b) at 25°C is 1000~
200000 cSt. The coating film forming material composition according to claim 1. 6. The coating film forming material composition according to claim 1, wherein the organic group bonded to the silicon atom of the compound (B)(b) is a methyl group. 7. The coating film forming material composition according to claim 1, wherein R ³ to ^{R 7} of the compound (D)(a) are all methyl groups. 8. The coating film forming material composition according to claim 1, wherein the volatile organosilicon compound in (D)(a) is octamethylcyclotetrasiloxane. 9. The coating film forming material composition according to claim 1, wherein the hydrocarbon solvent is an aromatic hydrocarbon selected from toluene and xylene. 10. The coating film forming material composition according to claim 1, wherein the fumed silica of (E) is a fumed silica surface-treated with hexamethyldisilazane. 11. The coating film forming material composition according to claim 1, wherein the fumed silica in (E) is a fumed silica surface-treated with octamethylcyclotetrasiloxane. 12. The coating film forming material composition according to claim 1, wherein the fumed silica in (E) is a fumed silica surface-treated with polydimethylsiloxane.