JPS61159465A - Topcoating composition - Google Patents

Abstract

PURPOSE:To provide the title coating compsn. which can form a new wall surface merely by applying it directly to a stained wall, by blending a water-soluble nonionic paste and an aluminum salt with a principal component composed of an org. or inorg. aggregate and a pigment. CONSTITUTION:A nonionic paste (A) (e.g. methyl-cellulose) which is water-solu ble, but is not dissociated into ions in water, and an aluminum salt (B) (e.g. aluminum sulfate) are blended with a principal component (C) composed of a mixture of an org. or inorg. fibrous material, a particulate matter, a flaky material or their ground product (e.g. ground pulp) and a pigment to obtain the desired topcoating compsn. When the compsn. is applied to a stained old wall, water-soluble anionic staining material such as lignin is caused to agglomer ate and gel by the action of components A and B, whereby pollution is prevented and a new wall surface can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a top coating composition that is most suitable for repairing the surface wall surface of interior and exterior wall covering materials.

<Prior Art> Conventionally, when repairing surface wall repulsion of interior and exterior wall covering materials, (1) the contaminated surface wall surface is removed and a new wall surface is formed by painting.

(2) Without removing the contaminated surface wall surface, apply an anti-accumulant over the surface and form a new wall surface on top of it by painting.

methods have been adopted.

<Problems to be solved by the invention> However, in method (1), the contaminated surface right wall is completely removed, making it impossible to live in during the renovation period.

■ Construction takes a long time. ■ Construction costs are high.

There were drawbacks such as. Especially when repairing interior walls■
There was the troublesome problem of not being able to live there and requiring another temporary residence.

In addition, method (21) requires less effort than method (1) because it does not require the removal of contaminated old surface walls; Based on this idea, this is applied on the right wall as an anti-acid agent,
It took a long time to dry, and a top coat had to be applied afterwards, leaving room for improvement in terms of construction time and cost.

Means for Solving the Problems> The present inventors have discovered that the contamination of the wall surfaces of the wall covering materials described above is caused by anionic water-soluble contaminants typified by lignin contained in wood and wall surfaces. If a coating composition containing a component that causes lignin to aggregate or gel (insolubilize) is used, it can be applied directly onto the right wall without removing the contaminated right wall or using an anti-slip agent. Alternatively, it was discovered that contamination can be suppressed or prevented and a new wall surface can be provided by simply spraying, leading to the present invention.

That is, the top coating composition of the present invention uses organic or inorganic fibrous materials, granular materials, flakes, or a mixture of pulverized products thereof and a pigment as the main material A, and this main material A and a nonionic water-soluble material. The first invention is a coating composition consisting of adhesive material B and salts of aluminum metal C, and the above-mentioned A
The second invention is a coating composition in which cationic synthetic resin emulsion D is further added to , B, and C.

<Function> As mentioned above, contamination of wood and old wall surfaces is caused by anionic water-soluble contaminants represented by lignin contained in them. By directly coating old walls with a coating composition containing a nonionic water-soluble adhesive and aluminum metal salts, or a coating composition containing a cationic synthetic resin emulsion, this contaminant can be agglomerated or This is characterized by gelation (insolubilization) and the formation of a new painted wall surface on this right wall.

By using a cationic substance in this way, it is not possible to use an anionic water-soluble glue, but the problem was solved by using a nonionic water-soluble glue that is stable to cations.

However, the first example of cationic substances is aluminum metal salts represented by sulfuric acid.
Furthermore, by using a cationic synthetic resin emulsion in combination, the above-mentioned anti-stick effect is doubled.
In addition, strength is also improved.

The nonionic water-soluble adhesive is used as a binder between the main material and other materials, as well as as an adhesive for the wall surface of this coating composition and as a thickener to provide workability for troweling.Hydroxypropylcellulose (HPC), hydroxypropyl starch (HPS), methyl (hydroxypropyl) cellulose (MHPC), methyl cellulose (
MO), droxyethyl cellulose (HEC), polyvinyl alcohol (PVA), hydroxypropyl guar gum (HPG), and polyethine oxide (PEO).
) etc. are used.

In this invention, the organic and inorganic fibrous materials, granular materials, and flake materials used as main materials are JISA-
Powder bulbs, wood flour, powdered clay, natural sand as inorganic granules, inorganic rocks, inorganic minerals, granular or crushed products such as pulverized slag and ceramic products are used as specified as ``690I fibrous top coating material'', These may be used alone or as a mixture with pigments.

Salts of aluminum metal include aluminum sulfate,
Useful are aluminum acetate, polyaluminum chloride, alum, and the like.

In addition to N, other metal ions that aggregate, gel (insolubilize), and thicken anionic pollutants such as lignin include F@s Cr 1NL % Co
, QL, Zll, Sn, Cd5H, etc., but these are all colored or toxic and are not suitable for the purpose of this invention.

Next, as for the cationic synthetic resin emulsion, the types of polymers that make up the cationic emulsion are vinyl acetate resin, ethylene-vinyl acetate copolymer resin, acrylic-vinyl acetate copolymer resin, acrylic ester copolymer resin, styrene-acrylic acid There are ester copolymer resins, synthetic rubbers, etc. (1) These resins are emulsified using a cationic activator or a cationic water-soluble resin as a protective colloid to form an emulsion;
(2) When producing these resins, it is appropriate to copolymerize cationic monomers such as aminoalkyl (meth)acrylate, vinylpyridium halide, aminomethylacrylamide, diallylammonium halide, and emulsify the resulting emulsion. be.

Therefore, in the case of a trowel coating material, the amount of water suitable for troweling is determined by the material used (when using a cationic synthetic resin emulsion in combination, the amount of water in the emulsion (including).

The nonionic water-soluble adhesive gives the necessary viscosity for troweling with respect to this amount of water, and this viscosity is 1000 to 1
A range of 0,000 cps is suitable.

Furthermore, since nonionic water-soluble glue materials vary in viscosity from low viscosity to high viscosity depending on their molecular weight, it is preferable to define their addition by viscosity rather than by base.

Next, salts of aluminum metal such as sulfuric acid band are converted into aluminum oxide, and the coating area of the trowel coating material is 1
A ratio of 0.01 to 107% is appropriate, and even if more than this is used, the effect will not change.

In addition, the addition ω of the cationic synthetic resin emulsion is preferably 30 per m2 of coating area (100 per tsubo) or more.
The upper limit may be determined based on the amount of water used in the trowel coating material, necessary performance improvements such as moisture resistance and adhesiveness, and economic reasons.

In this invention, pigments used as one of the main materials together with organic or inorganic fibrous materials, granular materials, flakes, or crushed products thereof include clay, diatomaceous earth, zeolite, alumina, activated clay, activated carbon, talc, It is preferable to use inorganic pigments such as iron oxide, chromium oxide, and titanium white, and organic pigments such as phthalocyanine green, phthalocyanine blue, and bisazo yellow.

In any case, the coating composition of this invention has a pH of
is preferably 8 or less.

Practical example This invention will be explained below with reference to Examples.

Example 1 An aggregate consisting of 70 parts by weight of pulverized pulp and 290 parts by weight of pulverized white polyester resin was mixed with 1000 parts by weight of a 2% aqueous solution of methyl cellulose as a nonionic water-soluble glue and sulfuric acid in an amount of 0.0% in terms of aluminum oxide. 01.0.1
．． A 2% aqueous solution of lignin (100') 4 was applied to a composition containing 1.0110.0 parts by weight, and then troweled onto a dried test plate to a thickness of 1 m4, and dried at room temperature for 48 hours. When the state of contamination was visually confirmed,
In the comparative example, a composition without sulfuric acid was observed to have brown staining, but in the composition of this example, no lignin staining was observed at all, and a beautiful white painted surface was obtained.

These test plates were also tested for moisture resistance and adhesion according to JISA-6908 "fibrous topcoat materials", and the results are shown in Table 1.

Table 1 Example 2 0.1 part by weight of aluminum sulfate was added to aggregate consisting of 70 parts by weight of pulverized valve material and 290 parts by weight of pulverized white polyester resin, and the mixture shown in Table 2 was mixed with 0.1 part by weight of aluminum oxide. A composition containing various nonionic water-soluble adhesives to provide the viscosity necessary for troweling was mixed with 1 part of a 2% aqueous solution of lignin.
Test after coating and drying 0i4 Each coat was applied with a trowel to a thickness of 1 m4, dried at room temperature for 48 hours, and the state of contamination was visually confirmed. In the compositions without lignin contamination, brown stains were observed, but in the compositions using various nonionic water-soluble adhesives containing sulfuric acid band, no lignin contamination was observed and a beautiful white painted surface was obtained. . Also.

Same as Example 1 for these test plates <J IsA
-6908 was tested for moisture resistance and adhesion, and the results shown in Table 2 were obtained.

Table 2 Example 3 An aggregate consisting of 70 parts by weight of a pulverized valve product, 290 parts by weight of a pulverized white polyester resin, 1000 parts by weight of a 2% aqueous solution of methyl cellulose as a nonionic water-soluble glue, and sulfuric acid band converted into aluminum oxide. A composition in which various cationic synthetic resin emulsions shown in Table 3 were blended with the composition of Experiment No. 3 listed in Table 1 of Example 1, in which 0.1 part by weight of lignin was blended, was mixed with 5 parts by weight of lignin. % aqueous solution 100
94 was coated with a trowel to a thickness of 1 m4 on each dried test plate, dried at room temperature for 4811 minutes, and visually confirmed the state of contamination.The composition without the cationic synthetic resin emulsion was slightly Although pale yellow contamination was observed, a beautiful white painted surface was obtained when various cationic synthetic resin emulsions were added.

Furthermore, regarding these test plates, JIS A-69
As a result of the moisture resistance and adhesiveness tests of No. 08, as shown in Table 3, it was found that the moisture resistance and adhesiveness of the products using the cationic synthetic resin emulsion were improved.

Table 3: In Table 3, the amount of cationic synthetic resin emulsion is 30'j4. Fr and 300 Fang 4 were selected, but when the trowel coating material of this invention is commercially available, the minimum packaging unit is for 1 tsubo (3.3 m'), and the synthetic resin emulsion that is usually attached for 1 tsubo is the minimum. is 100 tusks, and rarely exceeds 1000'). 10i/tsubo is 30 ga meng, 1000') 7 tsubo is 3001. Since this amount is J, this amount was selected and the experiment was conducted.

<Effects of the Invention> As described in detail above, this invention uses a nonionic water-soluble glue material, aluminum metal salts, or a cationic synthetic resin emulsion in the main material consisting of organic and inorganic aggregates and pigments. This is a coating composition that contains one or more of these cationic substances, which contaminates anionic water-soluble pollutants such as lignin contained in wood and old walls by coagulating and gelling (insolubilizing) them. This prevents the occurrence of this problem and forms a new wall surface on the right wall.

Claims (6)

[Claims] (1) The main material is an organic or inorganic fibrous material, granular material, flake material, or a mixture of these crushed products and a pigment, and the main material is a nonionic water-soluble glue material and an aluminum metal salt. A top coat coating composition characterized by: (2) The top coating composition according to claim 1, wherein the nonionic water-soluble adhesive is water-soluble and does not dissociate into ions in water. (3) The top coating composition according to claim 1, wherein the aluminum metal salt is at least one of aluminum sulfate, aluminum acetate, polyaluminum chloride, and alum. (4) The main material is organic or inorganic fibrous material, granular material, flake material, or a mixture of pulverized products thereof and pigment, and the main material is combined with nonionic water-soluble glue, aluminum metal salts, and cationic material. A top coating composition comprising a synthetic resin emulsion. (5) The top coating composition according to claim 4, wherein the nonionic water-soluble adhesive is water-soluble and does not dissociate into ions in water. (6) The top coating composition according to claim 4, wherein the aluminum metal salt is at least one of aluminum sulfate, aluminum acetate, polyaluminum chloride, and alum.