KR950005343B1 - Coating compositions - Google Patents

Abstract

The composition of sensible coating (I) consists of polyester polyol 20-25% having 1-5% hydroxy value and mw 300-1200, plate type aluminium silicate 10-30% as pigments, benton paste 0.2-1% as dispersing agent, dibutyl tindilorate solution 0.01-0.2% as thickening agent, wax 0.01-4% having mp of 30-80 deg. C as plasticizer, silica 4-5% as non-reflecting agent, 4,4-diphenyl methane diisocyate 10-30% as thickening agent and solvent 20-40%. The solvent is one of methyl acetate, butyl acetate, ketones, xylene or toluene. (I) is useful for coating on interior material of car, surface coating on electric machines, wall surfaces of house, furniture.

Description

Emotional paint composition

The present invention relates to a coating composition.

With the rapid development of industrial civilization, various materials such as metal, non-ferrous metal, plastic and glass, which are essential for modern life, are hard and sharp and give a cold impression.

In order to escape from this atmosphere and seek to recover humanity, we are using emotional materials such as rubber and leather in consideration of ergonomics, which are more convenient for humans, but the application fields are limited and colors are limited. It is difficult to apply to general materials.

Therefore, in order to escape from the coolness of materials such as steel and plastic, which is closely related to human life, the development of new materials and the development of paints are progressing rapidly, and as a part of this effort, all materials can be used without limitations. Research on paints that give the same feeling is actively conducted in each country.

At present, there are those mentioned in Japanese Patent Publications No. 63-132919, No. 61-285268, and the like, which are developed overseas. To explain this in more detail, Japanese Patent Publication No. 61-132919 discloses a coating film of 50 to 500 μ by reacting polyol and polyisocyanate on a soft material to give a soft feeling, and a soft feeling is expressed by using a blowing agent. Also, Japanese Patent Application Laid-Open No. 61-285268 discloses that polybutylene and silica are included as a main source of sensitivity for products obtained by reacting polyols and polyisocyanates.

However, the foamed molding has a problem due to bubbles in the appearance, and also has problems in solvent resistance, chemical resistance, heat resistance, weather resistance, and the like, and the polyurethane itself including polybutylene-based silica is not sufficiently sensitive.

Therefore, some developed countries have developed suede coatings using polymer beads to exhibit sufficient sensitizing effect and matting effect, but this also has weak weather resistance and severe discoloration, and not only contamination is easy due to the particle size of pigment itself, but also contaminated drawing Has a problem that is difficult to remove.

The present inventors have studied to solve the above problems and to develop a paint having excellent performance. As a result, the coating film itself is the same as a general coating, and has developed a new paint exhibiting sufficient emotional effects.

To explain this in detail, in the subject of polyester polyol resin, flake type aluminum silicate as a dispersing pigment, benton paste as a dispersant, dibutyltin dirorate as a curing accelerator, natural wax as a softening agent having a rigid effect, and amorphous silica as a matting agent. It is to prepare a sensitive coating composition used by reacting an aliphatic polyisocyanate with a curing agent.

To explain this in more detail, the resin may have a hydroxyl group value within 1 to 5%, and one or two or three polyester polyols having a molecular weight of 300 to 1200 may be mixed and used. % Is suitable. When the content of the resin is less than 25% by weight, the pot life is shortened, but when the content of the resin is more than 50% by weight, there is a problem of poor drying due to sensitivity and gloss difference.

As a sieving pigment, flaky aluminum silicate is used, which is preferably 10 to 30% by weight based on the total composition. If the diameter of the extender pigment is more than 10 mu, the sensitivity may be degraded.

Benton paste is used as a dispersing agent, and its amount is suitably 0.2 to 1% by weight based on the total composition.

As the curing accelerator, a dibutyl tin dilaurate solution is used, and its amount is preferably 0.01 to 0.2% by weight based on the total composition. When the amount of the curing accelerator is less than 0.01% by weight, the drying decreases and the coating film properties are lowered. When the amount of the curing accelerator is less than 0.2% by weight, the drying problem is improved, but the pot life is shortened.

As the softener, one or two or three kinds of natural waxes having a melting point of 30 to 80 ° C. may be used. The amount of the softener is preferably 0.01 to 4% by weight based on the total composition. When the amount of the softener is less than 0.01% by weight, the sensitivity is lowered, when more than 9% by weight there is a problem in that the re-paintability and mold release appearance in the appearance of the coating film.

As the matting agent, amorphous silica is used, and its amount is preferably 4 to 5% by weight. When the matting agent is 4% by weight or less, the glossiness rises and a sensitivity difference occurs, and a rubbery feeling appears. When the matting agent is 5% by weight or more, the gloss decreases as well as the leather value.

As the solvent, acetates such as methyl acetate and butyl acetate are mainly used, and ketones, xylene, toluene and the like can be mixed and used. The amount of use is suitably 20 to 40% by weight based on the total composition.

As the curing agent, an aliphatic polyisocyanate such as 4, 4'-diphenylmethane diisocyanate, isophorone diisocyanate or hexamethylene diisocyanate can be used, and the amount of use thereof is preferably 10 to 30% by weight in the total composition. When the amount of the curing agent is less than 10% by weight, reinforcing drying is lowered, and general physical properties such as impact resistance, adhesion, water resistance, and weather resistance are generally lowered. And when the weight is more than 30% by weight, the glossiness rises and the sensitivity is lowered, bubbles may occur in the drawing during the drying process.

In the present composition, organic and inorganic pigments capable of producing various colors can be added to produce various colors.

When explaining the characteristics of the paint prepared by the present invention in more detail, the urethane bonds of the polyol and isocyanate is a fast curing of the coating film to form a strong coating film and excellent weather resistance by using a non-restraint type polyisocyanate, special The elastic polyol gives a soft feeling with the flexibility and elasticity of the linear polyester polyol, and by using the matting agent, the surface of the coating is irregularly deformed, thereby increasing the coefficient of friction and suppressing the reflection of light. Is increased.

The paint according to the present invention can be used irrespective of materials such as plastic, steel, glass, etc. The main uses include interior materials such as automotive instrument panels, surface coating of home appliances, ceiling panels, walls, interior materials such as furniture, interior products, and the like. Can be used in various ways.

Coating thickness suitable for using the composition according to the invention as a coating is 50 to 200 mu.

Embodiments according to the present invention are as follows.

Example

After mixing the sensitized coating composition was prepared, the coating material 100μ thickness on the steel plate and ABS plate, the physical property test, the results are shown in Tables 1 and 2.

TABLE 1

TABLE 2

Comparative example

SOFT FEEL RR 2581 / 2A, manufactured by BAYER, Germany, was used in the same manner as in Examples, and then tested for physical properties. The results are shown in Tables 3 and 4 below.

TABLE 3

TABLE 4

(Property test method)

1. Adhesiveness: Using a razor blade on one side, make 100 checkerboard scales with 2mm gap on the surface of the test piece and sufficiently compress the cellophane adhesive tape on it and pull it in the direction of 90 ℃ at once to inspect the peeling state of the coating film.

2. Impact resistance: Using the DuPont Impact Tester, with the coated film surface of the adjusted test piece upward, apply a shock to the film surface at 1 / 2˝ × 500g and inspect the condition of the film.

3. Moisture resistance: After leaving for 24 hours in a temperature of 50 ± 2 ℃ and a relative humidity of 95% or higher, taken out and left for 1 hour at room temperature, inspect the surface state of the coating film and immediately perform the secondary adhesion test in the same manner as Check it.

4. Water resistance: After soaking 2/3 of the test specimens for 240 hours in pure water at 40 ± 2 ℃, and leaving it at room temperature for 1 hour, inspect the surface condition of coating film and immediately perform secondary adhesion test.

5. Acid resistance: There is no discoloration of the coating film after dropping 0.2cc hydrochloric acid solution of 2.5N specified in the oven at 38 ℃ for 30 minutes at intervals of 10 minutes.

6. Alkali resistance: 0.1N sodium hydroxide solution is added dropwise to the surface of coating film at 0.2cc and left at room temperature for 24 hours, then rinsed with water to inspect surface condition of coating film.

7. Insulin resistance: It is a cotton scent with lead-free gasoline. It should be wiped back and forth a little stronger 8 times by hand and there should be no deterioration of gloss and remarkable color.

8. Wax resistance: It is to be polished by hand and squeezed 8 times with cotton ball, and there should be no gloss reduction and remarkable color transfer.

9. Salt water spray resistance: ITABASHI RIKAKGYO (Japan) SQ-500-5-3 sprayed at 35 ± 1 ℃, 5% NaCl for 240 hours, and left at room temperature for 1 hour. Car adhesion tests are carried out.

10. Heat resistance: After 300 hours in a thermostatic chamber at 80 ℃, it is left at room temperature for 1 hour to observe the state of the coating film.

11.Heat cycle resistance: 70 ℃ × 3 hours → Room temperature × 1 hour → -30 ℃ × 3 hours → Room temperature × 1 hour → 40 ℃, 90% RH × 15 hours → Room temperature with TABAIESPEC (Japan) PL-3G After performing 3 cycles for 1 cycle as x 1 hour, the state of the coating film is examined and a secondary adhesion test is immediately performed.

12. Accelerated weather resistance: After 20 hours of irradiation at FADE-OMETER of ATLAS ELECTRIC DEVICES (USA) 18-F, visually inspect the appearance change.

13. Abrasion resistance: It should have more than 1000 exposures by TABER type CS-10, 1kg reciprocating wear tester.

14. Feeling of land (rubber and leather): Rub the specimen back and forth with your fingers and inspect it by hand.

Claims (2)

20 to 25% by weight of a polyester polyol having a hydroxyl value of 1 to 5%, a molecular weight of 300 to 1200, a sieving pigment having a particle size of 10 μm or less, 10 to 30% by weight of flaky aluminum silicate, and 0.2 to 1 weight of benton paste as a dispersant. %, 0.01 to 0.2% by weight of dibutyltin dirorate solution as a curing accelerator, 0.01 to 4% by weight of natural wax having a melting point of 30 to 80 ° C, 4 to 5% by weight of amorphous silica as a matting agent, and 20 to 40% by weight of a solvent And 10 to 30% by weight of 4, 4'-diphenylmethane diisocyanate as a curing agent. The method of claim 1, wherein the solvent is a methyl paint, butyl acetate, ketones, xylenes and toluene selected from the group consisting of one or more mixtures of sensitive paints.