JPS6189268A - Paint film forming material composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coating film forming material composition, and more specifically to a coating film forming material composition capable of forming a colored film with excellent dustproof properties on the surface of a silicone elastomer. relating to things.

[Prior Art and Problems] Various types of polyorganosiloxane compositions that cure at room temperature to become rubber-like elastic bodies are known.

For example, an acetoxy group bonded to a silicon atom in a polydiorganosiloxane whose both ends are capped with silanol groups
Polyorganosiloxane compositions using organosilicon compounds having hydrolyzable groups such as alkoxy groups, dialkylketoxime groups, dialkylamino groups, dialkylaminoxy groups, and tomethylamide groups as crosslinking agents are widely used in the construction industry, automobiles, Widely used in 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, have little change in physical properties due to temperature, do not deteriorate due to ozone or ultraviolet rays, and are easy to work with during construction.
Demand is increasing for high-rise buildings and other applications.

In recent years, it has also begun to be used as a coating material by applying this main polyorganosiloxane composition to roofs and walls to form a silicone elastic layer with excellent waterproofness and weather resistance. In addition to the above-mentioned characteristics, these architectural coating materials must be able to be adjusted to any color tone to suit the design of the building, and must also be able to prevent discoloration and stains over a long period of time. It is required that no occurrence of t-c occurs. However, although silicone elastomers have excellent elastic properties as mentioned above, they tend to collect dust easily because the main component, polydiorganosiloxane, is a dielectric material, and polydiorganosiloxane, which does not participate in crosslinking, tends to collect dust. Siloxane advances from the inside of the elastic body to the surface and covers dust (
n Because it is water-based, dust is not washed away by rainwater,
It has the disadvantage that staining progresses considerably. or,
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 staining, the present inventors previously developed an organosilicon compound containing an organoaminoxy group, a benzene-soluble polyorganosiloxane consisting of 5 ift units and R 35iO17 units, and a silanol group. A coating film-forming material is obtained by dissolving a mixture with end-capped polydiorganosiloxane or a condensation reaction product in a volatile organosilicon compound and a hydrocarbon solvent, and this is applied to a silicone elastomer to form a dust-proof coating on its surface. The present inventors discovered that it was possible to form an anti-67 film with excellent properties (Japanese Patent Application Laid-Open No. 57-162763).Next, the present inventors dispersed colored pigments into this material for the purpose of coloring the coating film. I tried to make it happen.

However, coating film-forming materials to which pigments have been added cause significant pigment separation during coating, making it impossible to form a uniform coating film, resulting in unsatisfactory results. Therefore, the present inventors investigated and found that smoke whose surface was treated with an organosilicon compound along with a coloring pigment?
It was discovered that a coating film forming material composition free from pigment separation could be obtained by using fl silica (Japanese Unexamined Patent Publication No. 59-10
No. 0170), this film-forming material composition was a two-pack type in which the organosilicon compound containing an organoaminoxy group was packaged separately and both were mixed at the time of use. In addition to the problems that the viscosity increases and the gloss changes, there is also the problem that the above-mentioned buried silica aggregates with the colored ffJl material during storage and further causes sedimentation.

[Means for Solving the Problems] As a result of intensive studies on methods for solving these problems, the inventors of the present invention found that, in place of the above-mentioned fumed silica, a method selected from the group consisting of fatty acids, resin acids, and naphthenic acids was used. The present invention was completed by discovering that the use of an aluminum salt of an organic acid not only solves all of the above-mentioned problems, but also facilitates the dispersion of colored pigments during production.

That is, the present invention provides: (A) 100 parts by weight of an organosilicon compound having an average number of organoaminoxy groups exceeding 2 in the molecule: (B) (a) SiOz unit and the following formula: % formula % (in the formula , R1 represents the same or different monovalent substituted or unsubstituted hydrocarbon group),
R'3Si01z□0 per mole of AA SiiOx unit
．． (b) 1001 iffi parts of a polyorganosiloxane present in an amount of 4 to 1.0 mol and having 0°0004 to 1 hydroxyl group bonded to each silicon atom; and (b) a viscosity of 30 to 2,000.0 O at 25°C.
OcSt(7) A mixture with 10-1.000 parts by weight of a polydiorganosiloxane whose both ends are capped with silanol groups or a condensation reaction product thereof, 10-1.000 parts by weight per 100 parts by weight of (A). 1ffi part: (C) (A
) and (B) total IF for 100-layer IT part T 5~
soo Parts by weight of colored pigment: (D) Hydrocarbon solvent, (A) to (E) (D total f
2o to soo xWi parts per f1100 parts by weight; and (E) (A) to (D) (7) total ff110
0! Te is 0° osmm part or more with respect to E weight part, and the total of (A) and (8) is ff1loo! 1 part or less of T100 lff per 1 part of ffi (7), an aluminum salt selected from the group consisting of fatty acids, resin acids, and naphthenic acids. .

The 7-minoxy group-containing organosilicon compound of component (A) used in the present invention includes silane 33 conductor and chain,
One cyclic or branched siloxane 3'A j is included. Examples of the radicals bonded to the silicon atom include aryl groups such as alkylno-S1 phenyl groups such as methyl, ethyl, propyl, butyl, and hexyl groups. In addition, - it is necessary to have an average number of organoaminoxy groups exceeding two in the molecule, and a film is formed within a short time after application, resulting in a film with better stain prevention properties. Examples of the organic group bonded to the organoaminoxy group, which preferably has an average of 2.5 or more, include a methyl group, an ethyl group, and a propyl group.
Monovalent hydrocarbons such as butyl and cyclohexyl groups! , ¥
Examples include two or one divalent hydrocarbon group such as tetramethylene group, pentamethylene, and 1.5. Among these, it is preferable to use an ethyl group for reasons such as ease of obtaining raw materials, ease of synthesis, reactivity, and ease of volatilization of the organohydroxylamine released. Examples of silicon compounds include: Hereinafter, for the sake of brevity, the following abbreviations will be used for each organosilicon compound.

[Abbreviations] Me: methyl group, Et: ethyl group, Bu nibbutyl group, v
i: vinyl group, Ph: phenyl group 5i(ONELz)n, MeSi(ONEtz)s
, Ph5i(ONnet)s.

EtJOMezSiSiMezONEtz * EtJ
OMezSiO3iMez(lNELz.

εtzNOMezSiOPhtSiOSiMezONE
tz +0NEt! [MetSiO-T-HMesiO.

■ NEtz NEt 0NEt! MeSi (OMe, 5i0111Etz)
s *PhSi [OMezSiONELg]
s + The polyorganosiloxane (B) (a) used in the present invention has SiOgji″L position and R′, Si
Usually, benzene-soluble polyorganosiloxane is used, which is composed of medium (R1 has the same meaning as above) and has a relatively low molecular type.R1 is a methyl group, an ethyl group, propyl group, decyl group,
Alkyl groups such as amyl group, hexyl group, offal k, decyl group; vinyl group-7 alkenyl group; aryl group such as phenyl group, 7-ralkyl group such as β-phenylethyl group, β-phenylpropyl mulberry, and their hydrogen Examples include those in which some of the atoms are substituted with chlorine atoms, fluorine atoms, nitrile groups, etc. Of these, it can be easily synthesized,
Because of its high weather resistance and reactivity with (b), R1
It is preferable that 90 mol% or more of it is an ethyl group,
It is further preferred that all of R1 are methyl groups,
The amount of R'3SiO+zt units is between 0.4 and 1.0 mol per 1 mol of Sing units, and R'3SiO1
/z AA Si, if it is less than 4 mol, it is difficult to stably obtain a benzene-soluble, low-molecular-weight product.
If the 5SiO + zt unit is more than 1.0 mole, the reactivity will be low when condensing with the silanol-terminated polydiorganosiloxane (b), resulting in a composition that can form a film with sufficient dustproofing effect and toughness. becomes difficult to obtain.

Further, the polyorganosiloxane (a) must have 0.0004 to 1 hydroxyl group bonded to silicon atoms per silicon atom. If the number of hydroxyl groups is less than 0.0004, the strength of the coating film will decrease, and if it exceeds 1, the crosslinking rate will be too high and sufficient pot life will not be obtained, and the coating film will become brittle.

Such polyorganosiloxane is made by adding a tetrafunctional silicon-containing compound selected from alkyl silicates such as ethyl silicate and propyl silicate, partial condensates thereof, silicon tetrachloride, and water glass to trimethylchlorosilane, trimethylchlorosilane, and water glass in the presence of a solvent. It can be obtained by cohydrolyzing with a triorganochlorosilane such as dimethylvinylchlorosilane or dimethylphenylchlorosilane and removing by-products by conventional means. The solvent used in this case is usually a hydrocarbon such as benzene, toluene, xylene, gasoline, n-hexane, or n-heptane.

The silanol-terminated polydiorganosiloxane (II) (b) used in the present invention has a substantially linear siloxane skeleton and has a temperature of 30 to 2. OOO
, OOOcst, preferably 1.000 to 200,0
A material having a viscosity of 0.00 cSt is used. If the viscosity of Miura is 30 cSt, the resulting film will have poor toughness and flexibility, and the viscosity will be 2,000,000 cSt.
If it exceeds this amount, the viscosity of the composition will increase, impeding workability. The organic group bonded to the silicon atom is exemplified by the same one as R1 in (a), and is suitable for achieving a balance between the viscosity of the composition and the necessary physical properties, and quickly causing a condensation reaction with the polyorganosiloxane in (a). In addition, the intermediate can be easily obtained industrially, and when forming dustproof films on joint sealants and surface coatings of buildings, it can be cured quickly at room temperature in places that are difficult to heat. It is preferable that all of them are methyl groups because they have both the
Vinyl groups may be introduced within a range of up to 0 mol%.

The polyorganosiloxane (a) and the silanol-terminated polydiorganosiloxane (b) may be used in the form of a simple mixture, or they may be co-condensed beforehand. When co-condensing, both may be used. This is done by mixing and heating preferably in the presence of caustic potash, caustic soda or organic peroxide. The polyorganosiloxane (a) usually has a solid content of 30 to 60! nff1%
It can be obtained as a hydrocarbon solution, but it can also be obtained by adding a solvent if necessary, then adding the silanol-terminated polydiorganosiloxane (b), and heating this mixed system. The solvent to be used is suitably a hydrocarbon solvent, with toluene and xylene being particularly preferred.The heating temperature is preferably in the range of 80 to 150°C, and in particular, the reflux temperature of the added solvent can be used to increase the temperature. This is advantageous in terms of 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 (a) 100
(b) 10-1.000 for 31M parts! 1ff
i parts, preferably 20 to so 1t parts. The reason for this is that if the amount of (b) is more than i,00 parts by weight, the required dust-proofing effect cannot be obtained, and if it is less than 101 parts by weight, the flexibility and toughness of the film will decrease.

(A) vs. 4 (B) (7) ffi is 1, (A)
The amount of (B) is 10 to 100 parts by weight, preferably 25 to 11 parts by weight, per 100 parts by weight. The reason for this is that if the amount of (B) is more than t, ooo 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 be reduced.

The coloring 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 colorless pigments or organic pigments.

Examples of inorganic pigments include titanium oxide, carbon blank, titanium yellow, chrome green, red iron, and ultramarine blue.

Examples of the 41IM materials include permanent yellow, toluidine red, phthalocyanine blue, and phthalocyanine green. The blending amount of these color pigments is 5 to 5 parts by weight based on a total of 1100 parts by weight of (A) and (B).
The range is 500 parts by weight. The reason is that if the amount of (C) is less than 5iIlffi parts, the hiding power of the coating film will be insufficient,
On the other hand, if the amount is more than 500 parts by weight, the flexibility and toughness of the coating film will be reduced, and the adhesion to the silicone elastomer will be reduced.

Examples of the hydrocarbon solvent (D) used in the present invention include benzene, toluene, xylene, n-hexane, n-hebutane, cyclohexane, and gasoline. Among these, toluene or xylene is preferred because of its appropriate volatility, solubility with the condensation reaction product (A), and ease of handling.

The amount of (D) is in the range of 20 to 500 parts by weight based on 100 parts by weight of the total amount of (A) to (C). If the amount of (b) is less than 20 parts, the coating film forming material becomes highly viscous, reducing work efficiency, and the coating film formed is so thick that the properties of the underlying silicone elastomer are not fully exhibited. not be done,
On the other hand, if the amount is more than 500 parts by weight, the thickness formed in one application will be thin, and sufficient hiding power and dust-proofing effect will not be obtained, resulting in the need to apply multiple coats, reducing work efficiency. .

Component (E) used in the present invention imparts appropriate thixotropic properties to the composition, prevents the occurrence of tnn bone separation sag during application, and enables the formation of a uniform coating film without uneven color. In addition to this, it also works to prevent pigments from settling and agglomerating during storage. Furthermore, the coating film forming material composition according to the present invention using this component (E) as a thixotropic property imparting agent uses fumed silica surface-treated with an organosilicon compound which is also a thixotropic property imparting agent. Compared to coating film-forming material compositions, it has the characteristic that the temporal changes such as increase in viscosity and increase in coating film thickness are extremely small after the organosilicon compound containing an organoaminoxy group is mixed with other components. . The other component (E) also functions as a pigment dispersion aid to facilitate the dispersion of the colored pigment (C) during production.

Component (E) is selected from aluminum salts of organic acids selected from the group consisting of fatty acids, resin acids, and naphthenic acids; fatty acid salts such as aluminum palmitate, aluminum stearate, and aluminum oleate; These (E
) The component may be mono-salt, di-salt, tri-salt, or a mixture. The amount of component (E) used is o, os for the total of (A) to (D) @ 100 parts! ! It must be greater than or equal to the im part, and the sum of (A) and (B)! 1
It is necessary that the amount is 100 parts by weight or less per 1 part by weight. If the coverage of component (E) is less than this, the imparting of thixotropic properties will not be sufficient and sagging and sagging will occur, not only will it not be possible to form a uniform coating film, but also the pigment will be removed during storage. On the other hand, if the amount of component (E) is more than this, the physical strength of the formed coating film will decrease, and the gloss will tend to disappear and unevenness will occur, so it is undesirable. Undesirable.

In addition, powders without coloring power such as zinc carbonate, magnesium carbonate, and calcium carbonate may be used as fillers, and fumed silica without surface treatment may be used to provide reinforcement to the coating film. Or ground silica can also be used.

Furthermore, in order to obtain an illumination forming material with low viscosity, excellent workability, and good wettability to the surface of the silicone elastomer, it is preferable to use a volatile organosilicon compound having a boiling point of 70 to 250° C. under normal pressure. This volatile silicon compound is a silane or siloxane that does not contain unstable groups and has a moderate volatility, in other words a boiling point of 7.
It is necessary that the temperature is in the range of 0 to 250°C. boiling point is 7
If it is lower than 0℃, it will volatilize early during application and will not work effectively, and if it is higher than 250℃, the drying properties will be poor and the film formation will be slow (specifically dimethyldiethylsilane, trimethylbutylsilane). silanes such as hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, linear siloxanes such as dodecamethylpentasiloxane, 3-trimethylsiloxy-1,1,
Examples include branched siloxanes such as 1,3,7,7,7-heptamethyltrisiloxane, and cyclic siloxanes such as hexamethylcyclotetrasiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane.

Among these, methyl-based siloxane is preferred because it is easy to synthesize, and octamethylcyclotetrasiloxane is even more preferred from the standpoint of achieving a suitable level of 11-carbonity.

The coating film forming material composition of the present invention is usually (El) and (D
) is stored separately into two components: a component in which (C) and (E) are dispersed, and a component (8), and both are mixed before use. When separating (C) and (E) into (R) and (D), it is advantageous to use an apparatus such as a sand mill, three-roll mill, attritor, or ball mill. Further, the coating operation may be performed by any method such as brush coating, roll coating, or spraying.

(Effects of the Invention) The coating film forming material composition of the present invention does not cause pigment separation during application, has low viscosity and thixotropic properties, and has good wettability to silicone elastomers. ,
A uniform coating film with no color unevenness can be formed on the surface of the silicone elastomer, and 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 appearance for a long period of time. Therefore, the coating film forming material composition according to the present invention can be used as a silicone elastic coating material for use on external walls of buildings.
It is particularly suitable as a tomp coat material that has both coloring and dust-proofing effects.

[Examples] The present invention will be explained below with reference to Preparation Examples and Examples. The following abbreviations will be used below for brevity.

[Abbreviation]

M: Me3SiO+zz unit D: MeSiO unit Q: SiO□ unit All "parts" in the examples indicate parts by weight, and benzene-soluble polyorganosiloxane is represented by the following abbreviations.

A 50% toluene solution of a resinous copolymer consisting of S-100 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: Consisting of Q units and M units, M per mole of Q trophic position (5091i, a resinous copolymer in which the ratio of the 11th position is 0.53 moles and the hydroxyl group is bonded to the silicon atom) Luene solution.

Preparation Example 1 (Preparation of (B)) 200 parts (7) S-1 and 100,000 c at 25°C
St (7) Both ends are sealed with silanol groups that have viscosity.
100 parts of the treated polydimethylsiloxane were mixed, and o and oo parts of caustic soda were added. The mixture was stirred and heated under reflux of toluene until the viscosity at 25° C. was 100.000 cSt. Then, neutralize and filter by the usual method.
After Q, 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 100 parts of polydimethylsiloxane capped at both ends with silanol groups having a viscosity of 50,000 cst at 25°C were prepared as in Preparation Example 1. A similar process was used to obtain condensation product B-2 with a solids content of 50%.

Preparation Example 3 (Preparation of test specimen) Polydimethylsiloxane 10 with a viscosity of 20.000 cst at 25°C and capped at both ends with silanol groups
A base compound was obtained by mixing in a kneader 0 parts, 10 parts of buried silica surface-treated with octamethylcyclotetrasiloxane, 100 parts of heavy calcium carbonate fine powder, and 210 parts of oxidized chik. To this, 0.25 parts of dibutyltin dilaure) and 4 parts of methyltris(butanone oxime) silane were sequentially added and mixed under a moisture-blocking condition. Add 100 parts of kerosene to this and dissolve it, and the resulting solution is 200 +++++++X200
IIIm, was applied onto a 2m+*thick mild steel plate using a paint brush to obtain a test specimen (hereinafter referred to as T-1). 7 at room temperature
After curing for one day, the film thickness of the silicone elastomer was measured and found to be approximately 0.5 ex-.

Preparation Example 4 (Preparation of test specimen) Polydimethylsiloxane 100 with a viscosity of 5,000 csL at 25°C and both ends blocked with silanol groups
A base compound was obtained by mixing 65 parts of finely ground calcium carbonate powder and 210 parts of ground oxide powder in a kneader. 93 children in this? 3.0 parts of the mixture were mixed.

Furthermore, 100 parts of kerosene was added to make it liquid, and 3ooI
III11
T-2) was obtained.

Example 1 In 1100 parts of B-1, 50 parts of rutile titanium oxide, 5 parts of (-tan yellow), aluminum soap shown in Table 1, a volatile organosilicon compound, and a hydrocarbon solvent were uniformly dispersed using a sand mill.・Q.

Next, Samples 11 to 15 were obtained by mixing silicon compounds having aminoxy groups shown in Table 1. Sample 15 was prepared using fatty acid aluminum and salt.
This is a comparative example.

Immediately after preparing these samples, 0.1, 0.2 and 0.3-linfFj9 were placed on a mild steel plate using a doctor blade.
The sample was immediately held vertically and observed for the presence or absence of sagging.Then, these samples were compared to the test specimen prepared in Preparation Example 3 (T
-1) was applied to the surface of the silicone elastic body, and the wettability to the silicone elastic body and the presence or absence of pigment separation were observed.

Thereafter, it was exposed outdoors and the degree of staining was observed. The test specimen (↑-1) itself to which no film-forming material was applied was also exposed as a comparative example. The results are also shown in Table 1.

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 showing the composition in the table represent parts (the same applies to Tables 2 to 5).

Example 2 Polydiorganosiloxane 50 capped at both ends with silanol groups and having a viscosity of 10.000 cSt at 25°C
parts, 100 parts of S-1, 100 parts of rutile titanium oxide,
10 parts of titanium yellow, 0.05 part of red iron, 0.025 part of carbon blank, 0.5 part of ultramarine, aluminum salts of fatty acids shown in Table 2, and fumed silica surface-treated with octamethylcyclotetrasiloxane (comparative example) ), a volatile organosilicon compound and a hydrocarbon solvent were uniformly dispersed using a sand mill, and then an organosilicon compound having an aminoxy group shown in Table 2 was mixed to prepare samples 21 to 2.
Got 5. However, Sample 24 is a comparative example in which fumed silica surface-treated with octamethylcyclotetrasiloxane was used instead of aluminum soap, and Sample 25 is a comparative example in which no aluminum salt of fatty acid was used.

The viscosity of these samples was measured using a B-type rotational viscometer immediately after preparation, and again 2 hours and 4 hours after preparation.Then, the viscosity was measured using a doctor blade on a mild steel plate with a
After coating to a thickness of 0.2 and 0.3 mm, the board was immediately held vertically and the presence or absence of sagging was observed. On the other hand, samples 21 to 25
on the surface of the silicone elastic body of the test specimen (T-1) prepared in Preparation Example 3.

Apply to improve wettability to silicone elastic material and! 11
The presence or absence of separation was observed. After that, there was heavy frost outside, and the extent of the dirt was estimated to be 1. The results are also shown in Table 2.

Example 3 To 100 parts of B-2, 50 parts of rutile titanium oxide, 3 parts of permanent yellow, 0.2 parts of red iron, 0.05 parts of carbon blank, aluminum salts of resin acids shown in Table 3, and volatile organosilicon compounds were added. Samples 31 to 33 were obtained by uniformly dispersing a hydrocarbon solvent using a sand mill and then mixing the organosilicon compounds having aminoxy groups shown in Table 3. Using these samples, Example 1
A similar test was conducted. The results are also shown in Table 3. T-2 prepared in Preparation Example 4 was used as the test specimen. In addition, the test specimen (T-2) itself to which no coating film-forming material was applied was also exposed as a comparative example.

Example 4 50 parts of polydimethylsiloxane with a viscosity of 20.0 OOcSt at 25°C, both ends blocked with silanol groups, 100 parts of S-2, 100 parts of rutile titanium oxide, 10 parts of titanium yellow, 0.15 parts of red iron 1 part, carbon blank 0.1 part, aluminum soap shown in Table 4, P1 Kirisho silica surface-treated with hexamethyldisilazane (comparative example), volatile organosilicon compound and hydrocarbon solvent using a sand mill. Samples 41 to 46 were obtained by mixing homogeneously dispersed O and the organosilicon compounds shown in Table 4.

However, sample 45 is a comparative example in which surface-treated fumed silica is used instead of aluminum salt of fatty acid, and sample 46 is a comparative example in which aluminum salt of fatty acid is not used. Tests similar to those in Example 2 were conducted using these samples, and the results are also shown in Table 4.

(Note) Matter 4 Me! SiOMezSiOSiMe3
10% by weight Me, SiO (Me, SiO)zsiMe3
To ”Me=SiO (MezSiO) 551
M1 20 #) Congo proboscis book 5 There is uneven coloring due to the dossier.

Reference Example 1 Polydimethylsiloxane 50 whose both ends were blocked with silanol groups and whose t8 degree at 25°C was 20.000 cSt.
parts, 100 parts of S-1, 100 parts of rutile titanium oxide,
20 parts of titanium yellow, 1 part of red iron, 2 parts of iron black, 75 parts of octamethylcyclotetrasiloxane, 25 parts of xylene, and on one side, 7.5 parts of aluminum tristearate.
One part was added to the other part, and smoked silica surface-treated with octamethylcyclotetrasiloxane was added and mixed. These were passed through three rolls twice under the same conditions to uniformly disperse them to obtain Sample 51 and Comparative Sample 52. The viscosity of the samples and the degree of pigment dispersion were confirmed using a crush gauge, and the results were as shown in Table 5.Next, 20 kg of each of these samples was packed in oil cans, sealed, and stored for 3 months before being opened. The property is L! The results were as shown in Table 5.

Part 5:l

Claims (1)

[Claims] 1. (A) 100 parts by weight of an organosilicon compound having an average number of organoaminoxy groups exceeding 2 in the molecule; (B) (a) SiO_2 units and the following formula: R^1_3SiO_1_/ _2 (wherein R^1 represents the same or different monovalent substituted or unsubstituted hydrocarbon group), R^1_3SiO_1_/
_2 unit is 0.4 to 100 per mole of SiO_2 unit
(b) 100 parts by weight of a polyorganosiloxane in which 0.0004 to 1 hydroxyl group is bonded per silicon atom and (b) a viscosity of 30 to 2,000,000 at 25°C;
A mixture of cSt with 10 to 1,000 parts by weight of polydiorganosiloxane whose both ends are capped with silanol groups, or a condensation reaction product thereof; (A) 10 to 1,000 parts by weight per 100 parts by weight;
(C) 5 parts per 100 parts by weight of the total amount of (A) and (B)
~500 parts by weight of colored pigment; (D) hydrocarbon solvent; total amount of (A) to (E) 100 parts by weight;
20 to 500 parts by weight; and (E) (A
) to 0.05 parts by weight or more based on 100 parts by weight of the total amount of (D), and 100 parts by weight or less based on 100 parts by weight of the total amount of (A) and (B), fatty acids and resins. A coating film forming material composition comprising: an aluminum salt of an organic acid selected from the group consisting of acids and naphthenic acids. 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 exceeding 2.5 in the molecule. 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. The coating film forming material composition according to claim 1, wherein R^1 is a methyl group. 5, (B) The viscosity of the compound (b) at 25°C is 1,
000 to 200,000 cSt, the coating film forming material composition according to claim 1. 6. (B) The coating film forming material composition according to claim 1, wherein the organic group bonded to the silicon atom of the compound (b) is a methyl group.