JPS608260B2 - Coating composition for cosmetic finishing - Google Patents

Description

[Detailed description of the invention] The present invention relates to novel cosmetic finishing coating compositions.

There are already many coating compositions that use silicate as a binder.
Are known.

Recently, there has been an increasing demand for compositions that harden rapidly at room temperature and have excellent heat resistance and/or weather resistance.

Furthermore, silicate-based binders are being developed that are water-insoluble and form coatings with appropriate bond strength.

For example, U.S. Pat. No. 3,345,194 and U.S. Pat. No. 3,239,521 disclose ammonium silicates of the following formula as basic binder components.

The patent also discloses a coating composition comprising the binder and pigments, dyes, colorants, fillers, hardeners, etc.

However, the binder has disadvantages such as poor adhesion, cracking and peeling, and furthermore, has almost no film-forming properties.

In order to improve its film-forming properties, the patent states that the binder solid content is 1
It has been proposed to add 60 parts by weight or more of fillers, zinc oxide, etc. to 0 parts by weight.

However, on the contrary, it has the disadvantage that the coating film hardness is low and the film becomes brittle, and in addition, it is completely unsuitable for decorative finishing in terms of appearance and workability. In other words, the coating strength composition using the above-mentioned known binder is suitable for applications such as zinc binders, which are somewhat porous but do not have much of a negative effect on the coating performance, and in fields where the appearance of the coating film is not particularly required. It was only applicable.

As a result of various studies on ammonium silicate compositions, the present inventors were able to obtain a coating composition that does not have any of the above-mentioned drawbacks. That is, the present invention has the following formula.

×, Y, Z: Numbers that define the relative amounts of each component in the compound.

× is 1, Y is 0.5 to 50, and Z is 0 to 99.

R: represents an alkyl radical containing 1 to 20 carbon atoms, and at least one is an omega hydroxyalkyl group.

p: is at least 4, indicating a bond between all R groups and N.

s: An integer from 1 to p, indicating the number of different R groups.

4 to 60 parts by weight of an alkali metal silicate, and a solid of a synthetic resin emulsion selected from acrylic resin emulsion, vinyl acetate resin emulsion, and ethylene-vinyl chloride resin emulsion, based on 100 parts by weight of solid content of ammonium silicate represented by A coating composition for decorative finishing consisting of 20 to 20 parts by weight, and 2 General formula .

X, Y, Z: numbers that define the relative amounts of each component in the compound.

X is 1, Y is 0.5 to 5, and Z is 0 to 99.

R: represents an alkyl radical containing 1 to 20 carbon atoms, and at least one is an omega hydroxyalkyl group.

p: is at least 4, indicating a bond between all R groups and N.

s: An integer from 1 to p, indicating the number of different R groups.

] At least one member selected from the group consisting of 4 to 60 parts by weight of an alkali metal silicate, an acrylic resin emulsion, a vinyl acetate resin emulsion, and an ethylene-vinyl chloride resin emulsion, based on 100 parts by weight of the ammonium silicate solid content represented by 20 to 200 parts by weight of synthetic resin emulsion solid content, and 50 to 45 parts by weight of inorganic filler.
0 parts by weight of a cosmetic finishing coating composition.

In other words, the present invention improves the film-forming properties of ammonium silicate by combining ammonium silicate, an organic resin emulsion, an alkali metal silicate, and an inorganic filler, and at the same time, develops a new application, especially as a binder for decorative finishing. It is.

The ammonium silicate used in the present invention has a specific structural formula as described above and is known and easily available on the market.

Furthermore, the alkali metal silicate used in the present invention is
Sodium silicate represented by Na20/nSi02 (n is 0.5 to 4), K20/nSi02 (n is 2 to 3.8)
) and LiQ・nSi02 (
n is lithium silicate represented by 3-8).

The alkali metal silicate is added at a solid content of 4 to 6 parts by weight based on 100 parts by weight of the solid content of ammonium silicate. If the amount added is less than 4 parts by weight, no effect on improving the film hardness is observed, and
If the proportion exceeds 6 parts by weight, the properties of ammonium silicate are lost and a good coating film cannot be obtained, which is not preferable.

Furthermore, in the present invention, a synthetic resin emulsion selected from acrylic resin emulsion, pinyl acetate resin emulsion, and ethylene-vinyl chloride resin emulsion is added to the ammonium silicate and alkali metal silicate.

However, the above-mentioned emulsion was selected to improve the moisture resistance, chemical resistance, etc. of the decorative finishing coating, and other synthetic resin emulsions other than those mentioned above do not provide sufficient effects. In the present invention, when the synthetic resin emulsion added is less than 2 parts by weight as a solid content with respect to 100 parts by weight of ammonium silicate, effects such as crack resistance and peelability of the coating can be improved. I can't.

If the solid content exceeds 200 parts by weight, the hot water resistance, weather resistance, hardness, etc. will be reduced, and the characteristics of the silicate binder will be lost. In the composition of the present invention, for the purpose of preventing cracks and cracks over a long period of time, extender pigments such as kaolin, talc, precipitated barium sulfate, alumina, asbestos, silica powder, and basic magnesium carbonate are used as fillers and the solid content of ammonium silicate is added. It is possible to add 50 to 45 parts by weight per 10 parts by weight.

Furthermore, the composition of the present invention contains common organic and inorganic pigments, dyes,
Other additives can be added.

The composition of the present invention as described above can be applied to slate, concrete, mortar, glass, wood, iron, aluminum, zinc, etc., using an ordinary coating method such as brushing or spraying, and an alkali metal sulfate paint as a primer. It can also be applied over it.

Furthermore, the addition of the emulsion resin does not reduce the performance of the coating film, and also has the effect that the emulsion resin is less susceptible to heat.

Hereinafter, the details of the present invention will be explained with reference to Examples.

"Parts" or "%" are expressed as "parts by weight" or "% by weight." Example 1 Ammonium silicate and hiladelphiaQu
Product name Quram 3365 manufactured by Lez Company: Solid content %, 2
5%] to 10 base parts, 25 parts of acrylic resin emulsion [trade name Nikazole RX-4 manufactured by Nippon Carbide Co., Ltd.] was added as a solid content, and then potassium silicate solution [specific gravity (20°C, Be' ): 41.0 to 42.0, molar ratio: 3
．． 03-31.3Si02:26-27%, K20:1
3 to 14%, remaining water] (product name: A potash silicate, manufactured by Nihon Kagaku Kogyo Co., Ltd.) and lithium silicate solution [specific gravity (25q
C, 1.17, molar ratio: 7.5, Si02:20
%, Li20: 1.3%, remaining water] (product name: Lithium Silicate 75, manufactured by Nissan Chemical Co., Ltd.) at a ratio of 1:1 (weight ratio) was mixed in two parts, and then mixed with a 6 mil applicator. It was applied on a glass plate at room temperature, dried at room temperature, and used for a comparative test.

The ammonium silicate is Si02%:20%, N
a20: 2.25%, non-volatile content 25.1%, specific gravity (20
°C): 1.18, viscosity (2yo, Burtskfield)
:45 ratio ps, pH (25qo):11.3. Example 2 After mixing 40 parts of lithium silicate (same as in Example 1) and 4 parts of acrylic resin emulsion (same as in Example 1) as a solid content with respect to 100 parts of the ammonium silicate solution. , applied in the same manner as in Example 1,
Dry.

Example 3 Sodium silicate [specific gravity (15 qo, technique'): 40 or more, molar ratio: 3.1 to 3.3, Si02: 2.8 to 30%, Na2 to 100 parts of the ammonium silicate solution
A mixed solution of 1:3 (weight ratio) of 0:9 to 10%, remaining moisture] (Sodium silicate No. 3 manufactured by Nihon Kagaku Kogyo Co., Ltd.) and lithium silicate (same as above) was mixed with 4 anchors and ethylene. A vinyl chloride resin emulsion (trade name: Vinadic #600, manufactured by Dainippon Ink & Chemicals Co., Ltd.) was used as a solid content of 4 anchors, and kaolin, alumina, and titanium were added in a ratio of 2:2:1.
(weight ratio) was added, and after kneading in a pot mill for a day and night, it was painted on a slate board and dried at room temperature.

Example 4 To 100 parts of the above ammonium silicate, 25 parts of the same mixture solution of sodium silicate and potassium silicate of 3:1 (weight ratio) was added to vinyl acetate resin emulsion (Nippon Carbide Co., Ltd. trade name NICAZOL). CL-122)
25 parts as a solid content, and further 75 parts of a filler consisting of 2:2:1 (weight ratio) of Yuruk, precipitated barium sulfate, and titanium were added and kneaded overnight in a pot mill, followed by a curing agent described below. The composition obtained by adding 5 parts of was spray-coated onto a slate board and abraded at 200 qo for 30 minutes.

The curing agent was prepared by suspending 78 parts of aluminum hydroxide in 500 parts of water, gradually mixing it in 130 parts of 75% phosphoric acid, and then further mixing 150 parts of water and 800 parts of zinc oxide. ~200oo for 3 hours, then 350~40
A pulverized compound obtained by firing at 00° for 2 hours and then at 600 to 650 qC for 2 hours was used. Example 5 100 parts of the ammonium silicate was mixed with the same potassium silicate and lithium silicate at a ratio of 3:1 (weight ratio).
1 part of the mixed liquid, 1 part of the acrylic resin emulsion (same as above) as a solid content, and 3 parts of a filler consisting of talc, kaolin, and titanium in a weight ratio of 2:2:1. After kneading in a pot mill overnight, the mixture obtained by adding 5 parts of the hardening agent was air-sprayed onto a slate board, and baked at 200 qo for 3 times the darkness.

Example 6 For 100 parts of the ammonium silicate, 4 parts of the same lithium silicate as above, 25 parts of ethylene-PVC resin emulsion (same as in Example 3) as a solid content, and further kaolin, alumina, and titanium were added. 2:2
4 parts of filler consisting of :1 (weight ratio) were added, kneaded overnight in a pot mill, and then a slate board was primed with an alkali metal silicate-based inorganic paint and then air sprayed and dried at room temperature. .

Example 7 For 100 parts of the ammonium silicate, 10 parts of the same mixture of lithium silicate and sodium silicate (3:1 (weight ratio)) and 25 parts of the acrylic resin emulsion (same as above) as solid content Part, further talc, alumina,
100% titanium filler with 2:2:1 (weight ratio)
After kneading in a pot mill overnight, the mixture was air-sprayed onto a slate board and dried.

Comparative Example 1 The ammonium silicate solution was applied onto a 6 mil applicator glass plate and allowed to dry at room temperature.

Comparative Example 2 To 100 parts of the ammonium silicate, 150 parts of a filler consisting of alumina, talc, and titanium in a weight ratio of 2:2:1 was added, and after kneading in a pot mill overnight, a slate plate was heated with air. Spray painted and allowed to dry at room temperature.

Comparative Example 3 For 100 parts of the ammonium silicate, 1.5 parts of the same sodium silicate as above, 4 parts of acrylic resin emulsion (same as above) as solid content,
Furthermore, 75 parts of a filler consisting of kaolin, alumina, and titanium in a weight ratio of 2:2:1 was added, and the mixture was kneaded in a pot mill overnight, then air sprayed onto a slate plate and dried at room temperature.

Comparative Example 4 For 100 parts of the ammonium silicate, 66 parts of the same mixture of potassium silicate and lithium silicate (1:1 (weight ratio)) and an ethylene monochloride resin emulsion (same as above) were added. 55 parts of the solid content was mixed, and 75 parts of a filler consisting of alumina, precipitated barium sulfate, and titanium in a 2:2:1 (weight ratio) was added, and the mixture was brazed overnight in a pot mill, followed by the same hardening as above. After adding 5% of the agent, the slate board was air-sprayed and heated at 200℃ for 30 minutes.
There was a competition for minutes.

Comparative Example 5 20 parts of the same sodium silicate as above was mixed with 100 parts of the ammonium silicate, and kaolin, talc,
75 parts of a filler containing titanium in a weight ratio of 2:2:1 was added, kneaded overnight in a pot mill, and then air sprayed onto a slate plate and dried at room temperature.

Comparative Example 6 Kaolin, talc, and titanium were mixed in a ratio of 2:2:1 to 100 parts of solid content of vinyl acetate resin emulsion (same as above).
After adding 200 parts of a filler consisting of (weight ratio) and bonding in a pot mill overnight, a slate board was air-sprayed and dried at room temperature.

Comparative Example 7 For 150 parts of the ammonium silicate, 5 parts of the potassium silicate, . 3 parts of alumina and 5 parts of a styrene-butadiene resin emulsion (trade name: NIBOL 4850 manufactured by Nippon Zeon ■, non-volatile content 63%) were added, kneaded overnight in a pot mill, and then air-sprayed onto a slate board. Dry at room temperature.

Comparative Example 8 For 100 parts of the ammonium silicate, 1 part of the sodium silicate, 2 parts of talc, and styrene-acrylic resin emulsion [Nippon Carbide Kogyo ■]
Product name Nikazol RX-234A: Non-volatile content 60%]
After adding the base part No. 7 and kneading the mixture overnight in a pot mill, the mixture was air-sprayed onto a slate board and dried at room temperature.

Table 1 Comparative test results Note 1) Appearance of coating: The presence or absence of the coating surface condition after coating was checked.

Note 2) Paint film (pencil) hardness: Pencil hardness was checked using Mitsubishi Uni.

Note 3) Hot water resistance: After the test by immersing the test plate in hot water of 80 to 85°C for 2 hours, the presence or absence of any abnormality in the painted surface condition was checked. Note 4) Chemical-resistant raw material: After the test, the coated surface was brought into contact with a 5% sulfuric acid solution for 24 hours, and the presence or absence of any abnormalities in the condition of the coated surface was checked. Note 5) Outdoor exposure: Tsurumi 1 year Note 6) Accelerated seismic resistance: Toyo Rika (manufactured by Carbonark) used a meter.

After the 1000 hour test, the coated surface was checked for abnormalities.

Claims (1)

[Claims] 1 General formula X(NnR^s_p)_2O・YSiO_2・ZH_2
O [However, N: nitrogen atom n: an integer smaller than 10, preferably 5 or less. X, Y, Z: numbers that define the relative amounts of each component in the compound. X is 1, Y is 0.5-50, and Z is 0-99. R: represents an alkyl radical containing 1 to 20 carbon atoms, and at least one is an omega hydroxyalkyl group. p: is at least 4, indicating a bond between all R groups and N. s: An integer from 1 to p, indicating the number of different R groups. 4 to 60 parts by weight of an alkali metal silicate, and at least one selected from the group consisting of acrylic resin emulsion, vinyl acetate resin emulsion, and ethylene-vinyl chloride resin emulsion. A cosmetic finishing coating composition comprising 20 to 200 parts by weight of one synthetic resin emulsion solids. 2 General formula X(N_nR^s_p)_2O・YSiO_2・ZH_
2O [However, N: nitrogen atom n: an integer smaller than 10, preferably 5 or less. X, Y, Z: numbers that define the relative amounts of each component in the compound. X is 1, Y is 0.5-50, and Z is 0-99. R: represents an alkyl radical containing 1 to 20 carbon atoms, and at least one is an omega hydroxyalkyl group. p: is at least 4, indicating a bond between all R groups and N. s: An integer from 1 to p, indicating the number of different R groups. 4 to 60 parts by weight of an alkali metal silicate, at least one selected from the group consisting of an acrylic resin emulsion, a vinyl acetate resin emulsion, and an ethylene-vinyl chloride resin emulsion. 20 to 200 parts by weight of a synthetic resin emulsion solid content, and 50 to 45 parts by weight of an inorganic filler.
0 parts by weight of a cosmetic finishing coating composition.