JPS61120869A - Emulsion paint composition - Google Patents

Abstract

PURPOSE:To provide the titled compsn. which has excellent quick dryness and pattern forming ability and gives a coating film having excellent appearance and durability, consisting of a resin emulsion, a modified hydroxycellulose derivative, a polyalkylene glycol ether and a pigment. CONSTITUTION:7-22pts.wt. resin emulsion (A) such as acrylic resin or vinyl acetate/acrylic resin emulsion, 0.1-2pts.wt. modified hydroxycellulose derivative (B) having a viscosity of 300-6,000cps/25 deg.C modified with a 2-3C alkyl group, 0.2-4pts.wt. 2-3C polyalkylene glycol ether (C) having an MW of 5,000-50,000 and 50-80pts.wt. pigment (D) composed of fine pigment having a particle size of a 50mum or below and coarse pigment having a particle size of 50mum or above in a ratio of 40-60/60-40, are blended in such a proportion as to give a ratio of B to C of 90-3/10-97, thus obtaining an emulsion paint compsn. having a viscosity of 150-300ps.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an emulsion resin-based coating composition that is applied to the interior and exterior of buildings, and particularly to a quick-drying coating composition that has excellent pattern formation properties.

Conventional technology The interior and exterior walls of buildings are often made of Rihartport, asbestos slate, silicon calboard, etc., which have been available in recent years. These boards are usually painted after being used because the materials themselves lack aesthetic appeal and durability such as water resistance.

In recent years, instead of the traditional method of forming walls for buildings and then painting them, these boards have been painted in a continuous manner in the building and then transported to construction sites to be finished as walls. It is being

As an emulsion paint composition for indoor and outdoor use, for example, the method described in Japanese Patent Application Laid-Open No. 56-50973 is as follows.
−r h−1,−) tb? ? /
A latex coating composition containing polymerized resin particles containing L Q C, Ol nz ≦ 6k Shipa -, 1φ contains a diallyl-based urea compound as a copolymer component. ′
1. The composition is not intended for use in the new =F method as described in -.

Problems to be Solved by the Invention In manufacturing such painted building materials, there are various problems as described below.

Painted panels used for exterior walls are required to have a thick film coating of approximately 300 to 1500 g/m' from the viewpoint of durability and the formation of patterns.

Furthermore, for continuous production within a factory, the paint must be quick-drying. In other words, productivity in the case of firing-type paints depends on the flash-off of the solvent used to cure the paint and the length of the firing booth, but productivity in the case of room-temperature drying paints, especially water-based paints, is Therefore, securing the space necessary for drying (long conveyor line or large area) is a major problem. In order to minimize this drying area,
It is desirable that paints dry as quickly as possible without compromising other properties. In addition, quick drying is desired from the viewpoint of ease of maintaining the shape of the pattern applied to the coating film and ease of forming the pattern.

However, if the paint dries too quickly, the coating workability (suitability for roll coating, suitability for circulation of ATI+ within the roll coater) will decrease, and the smoothness of the coating film will also decrease, so drying performance is an important factor. .

From these points, quick drying, pattern formation, roll coat 1 suitability during coating, paint circulation suitability within the roll coater,
It is an object of the present invention to provide a paint that satisfies the properties required for the appearance, durability, etc. of the paint film.

The first step of the present invention to solve the problems is as follows: A. Emulsion resin: 7 to 22 parts by weight B. Hydroxycellulose derivative modified with an alkyl group having 2 to 3 carbon atoms. 0.1 to 2 folds: B. 2 carbon atoms. Polyalkylene glycol ether having a number of 2 to 3 0.2 to 4 parts [4 parts C pigment, 50 to 80 parts including a part,
It is an emulsion coating composition with excellent pattern forming properties, characterized by a viscosity of 150 to 300 Ps.

E. When carrying out the invention, B1 and B2 in 1-.
It is preferable that the ratio of the pigment is 90-3/10-97, and the pigment is less than 50 gm fine [1 face] and 50 μm
It is advantageous that the ratio of the coarse pigments in -1- below is 40-60/60-40.

Each component constituting the present invention will be explained in detail below.

(Emulsion resin) As the emulsion resin used in the present invention,
Acrylic resin, vinyl acetate - acrylic resin, styrene -
It is possible to use materials such as acrylic resin that dry at room temperature and are commonly used in architectural paints.

(Hydroxycellulose M conductor) The hydroxycellulose derivative used in the present invention has a viscosity of 300 to 6°000 cps/25°C from the viewpoint of manufacturing convenience, roll coater suitability, and pattern forming properties.
The optimum value is 2,400 to 3°000 cps.

(Polyalkylene glycol ether) The polyalkylene glycol ether used in the present invention preferably has a molecular weight of 5,000 to 30,000, most preferably to, ooo to 2o, ooo from the viewpoint of viscosity stability.

(Pigment) Calcium bicarbonate is often used as the pigment in the present invention, but as a coarse pigment of 50 to 250 meters (280 to 60 mesh), in addition to No. 8 crushed sand (carbonate Rusium and crushed sand type pigments), N weight or R weight (titanium with other coloring pigments) for fine items less than 5' OpLm (280 mesh or less)
is used. A detailed explanation of the above-mentioned pigments is as follows.

EXAMPLES In order to explain the present invention in detail, Examples and Comparative Examples are given below, but the present invention is not limited to the Examples described in F.

Examples 1 to 10 and Comparative Examples 1 to 6 A mixture of various components listed in Table 1 below was tested.

The test method is as follows.

(Example of Pattern Formation) A pattern was formed on a base plate using the apparatus shown in FIG. The paint was supported on the base plate, and a pattern roll was installed on the base plate. The base plate or pattern roll was moved in parallel. The thickness of the mold is 0.2mm±0.1mm for the four parts, and 5mm for the convex part.
Embossing was possible with an accuracy of ±1 mm7. The conveyor speed and roll speed of the base plate were both 15 m/min.

As colorants, in order to form a brick-like pattern, 0.3 parts of j↑ pattern and 1 part of titanium white were added to the blend. Since the film was thick, a pale brick color was obtained by mixing color pigments in this range.

(Test and Judgment) The following characteristics required when applying a rough pattern using a pattern roll were investigated.

(0-roll coater suitability Reverse roll coater should be able to coat the entire surface of the substrate uniformly.

■Circulation within the roll coater Maintaining paint circulation between the paint tank and the coke (paint management).

((1) Embossability (pattern forming ability) The paint extruded on the convex part of the pattern roll moves to the four parts, and the pattern made on the pattern roll can be formed as it is.

θ) Shape retention The pattern formed during the drying process should not change.

Each property was determined by the following method.

It was visually determined that the pattern formation was smooth and the pattern could be clearly expressed.

0 The pattern is reproduced.　△　The pattern has changed slightly.

× The pattern changed significantly and became unclear.

Shape retention: It was visually determined that the formed pattern did not flow until drying, the unevenness did not flatten, and the initial pattern was maintained.

○ The pattern did not change and the initial pattern was maintained.

× The pattern has become dull and has changed significantly.

Roll coater suitability When performing roll coater painting, the presence or absence of phenomena such as roving or smearing that would impede uniform coating of the paint film was determined visually.

○ It was possible to apply it smoothly without any roving or smearing.

△ Roving and smearing are observed.

× Roving and smearing are significant.

Roll coater circulation low-IL-I Jy bottom 114:
φ/-1 # button, - to Ora The paint flowed smoothly in the roll and its circulation system, and it was determined visually whether or not the paint was mixed or not.

○ Good circulation of Q interest.

X: Paint accumulates in the pipe and paint circulation is poor.

The evaluation results of various performances are shown in Table 1 below.

Table 1 Composition and test results (Part 1) PS1 Table Composition and test results (Part 2) Example Styrene acrylic emulsion resin (Soil 1) 20.0
6.608 Heavy coal weight 10.7 11.98
hj Ji;, sand 10.7 11.9N
Heavy coal IQ, 7 11.9R heavy coal
10.7 11.9 Hydroxyethyl cellulose 0.4 0.3 Polyethylene glycol ether 0.9 0.5 Additives (
Note 2) 2, 5 2, 5 diluent (tap water) 35.0 41.8 total
101.6 99.3 Table 1 Composition and test results (Part 3) Table 1 Composition and test results (Part 4) Table 1 Composition and test results (Part 5) Table 1
Composition and test results (Part 6) 9 Table 1 Composition and test results (Part 7) Table 1 Composition and test results (Part 8) Comparison Example Styrene-acrylic emulsion resin (Note 1) 9, 2
9, 008 heavy carbon weight 37.0
4.58 silica crushed sand 27.7 4.5N
Severity 0 36. OR severity
9.2 27.0 Hydroxyethyl cellulose 0.2 0.2 Manufacturer's name: Cypinol NPX21 Manufacturer's name: Saiten Chemical Co., Ltd. (Note 2) Additives include ethyl 1/glycol 2.0 parts by weight antifoaming for all formulations agent
0.01 parts by weight of ammonia water was used in a 0.4 type tank.

The manufacturer names and compositions of additives are shown in the table below.

(Note 3) The drying time is as follows: Apply the paint at a rate of 500g/rn', emboss it into an uneven pattern with a pattern roll, and dry it in a hot air drying oven for 80 minutes.
It was dried for 9 cxio minutes and evaluated.

Judgment standard O is JIS-K 54.00, 5°3
Passed curing and drying, × failed.

From the test results, it can be seen that the more coarse the pigment, the worse the roll coater suitability and the circulation within the roll coater, and the more fine the pigment, the worse the shape retention. Furthermore, if the hydroxycellulose derivative is too large, suitability for a roll coater and circulation within the roll coater will be poor, and conversely, if the polyalkylene glycol ether is too large, shape retention will be poor. Viscosity is 3000p
s 1], paint production and work efficiency decrease, and 150 cp
If the thickness is less than s, both pattern forming properties and shape retention properties are poor. The pattern forming property is poor no matter which of the above components is biased.

Therefore, the balance of the characteristics listed above (0, ■, ■ and ■) is such that the ratio of coarse pigment to fine pigment is 6/4 to 4/6,
0°1 to 2.0 parts by weight of hydroxycellulose derivative,
It can be seen that the polyalkylene glycol ether is well maintained in the range of 0.2 to 4.0 parts by weight and the viscosity is in the range of 150 cps to 300 cps.

Effects of the Invention The present invention can provide a paint having a viscosity suitable for painting workability by using a vehicle containing two kinds of special thickeners for emulsion resin. Furthermore, by blending fine pigments and coarse pigments in a specific ratio, coating workability can be adjusted to a more appropriate range. The paint of the present invention is a paint that has improved quick-drying properties and pattern-forming properties while maintaining conventional coating performance.

[Brief explanation of drawings]

FIG. 1 is an illustrative perspective view of the apparatus used to test the coating composition of the present invention. l...base plate, 2...-paint, 30@) Cutan roll

Claims (3)

[Claims] (1) A Emulsion resin 7 to 22 parts by weight B1 Hydroxycellulose derivative modified with an alkyl group having 2 to 3 carbon atoms 0.1 to 2 parts by weight B2 Polyalkylene glycol ether having 2 to 3 carbon atoms 0. An emulsion coating composition comprising 2 to 4 parts by weight of C pigment and 50 to 80 parts by weight, and having a viscosity of 150 to 300 Ps. (2) The emulsion coating composition according to claim 1, wherein the ratio of B1 to B2 is 90-3/10-97. (3) The pigment consists of a fine pigment with a diameter of less than 50 μm and a coarse pigment with a diameter of 50 μm or more, and the ratio of the fine pigment to the coarse pigment is 4.
0-60/60-40 emulsion coating composition according to claim 1 or 2.