JPS5829343B2 - Water-resistant wall finishing material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an exterior wall by imparting water resistance to a wall finishing material that uses granular rock wool as an aggregate and exhibits a finished surface with a rich three-dimensional effect.

This has been improved so that it can be applied to bathrooms, washrooms, etc.

Regarding wall finishing materials using granular rock wool as aggregate,
2-43658, JP 47-43028, JP 49-120918, JP 51-91
It is described in Japanese Patent No. 28 and Japanese Patent Application Laid-Open No. 53-37736, and is being widely adopted because it has an embossed finish surface with a rich three-dimensional effect and is excellent in sound absorption, heat insulation, and water resistance.

However, conventionally known wall materials are used only in areas that do not come into contact with water, such as interior walls or ceiling surfaces, and it is difficult to suppress the water absorption of granular rock wool. Not suitable for finishing.

That is, in the case of wall finishing materials that use granular rock wool as an aggregate, in order to form an embossed finished surface with a rich three-dimensional effect and to smoothly perform troweling or spray painting, a cellulose material with good water retention is used as a glue. The use of sodium glycolate is considered essential, and when mixing emulsion resin with wall materials that use granular rock wool as an aggregate and the conventionally used cellulose sodium glycolate as a glue, it is necessary to use sodium glycolate when mixing with water. When cellulose sodium glycolate comes into contact with water, it immediately produces a paste-like thickened liquid, which inhibits the penetration of the emulsion resin into the granular rock wool, making it difficult to impregnate the inside of the granular rock wool with the emulsion resin.

In view of these circumstances, the inventors of the present invention have made numerous attempts to impart water resistance to wall materials using granular rock wool as an aggregate.
Textile industry sodium glycolate and acrylic styrene copolymer emulsion resin or vinyl acetate acrylic copolymer emulsion resin are used together as a glue, and cellulose sodium glycolate is granulated and kneaded with water for an extremely short period of several seconds to several minutes at the initial stage ( By suppressing the dissolution of cellulose sodium glycolate in the water, we unexpectedly found that scales were sufficiently impregnated with emulsion resin in granular rock wool, and the wall material mixed with water in this state was effective when painting walls. It has good workability and presents a finished surface with a rich three-dimensional effect.The cotton-like and flexible properties of granular rock wool have disappeared, and the scales have been found to have a decorative finished surface with excellent water resistance.

The granular rock wool in the present invention can be produced by mixing rock wool with short fibers such as pulverized pulp or rock wool with short fibers and fine aggregate such as silica sand and agar stone to form a wall material. Usually, granular rock wool is mixed with a glue, inorganic fillers such as calcium carbonate and clay, pigments such as iron oxide, titanium oxide, cyanine braze, and cyanine green, and antifungal agents. .

Granular cellulose sodium glycolate suitable for carrying out the present invention can be obtained by sprinkling water on powdered cellulose sodium glycolate, mixing this to form a lump, drying and sieving, or using cellulose glycol in a wet state. Acid soda is extruded through small holes and dried.

It can be made by sieving,
The desirable particle size distribution and bulk specific gravity are 12 to 80 mesh and 0.
．． It is in the range of 6 to 0.8 g/cd.

This will be explained in detail below using Examples and Reference Examples.

Reference example 1 Using a high-speed mixer with a capacity of 100 t and a peripheral rotational speed of 20 m/min, 12 pieces of flocculent rock wool were mixed with 2, average fiber length Q, and 3 a.
Pulverized pulp 2 Kp of m is mixed by rolling for 5 minutes, and the product with a particle size of 3 mm or more is collected by sieving.
Then, granular rock wool with a rock wool core and pulverized pulp coated around it was formed.

Reference Example 2 Using a high-speed mixer with a capacity of 100 t and a peripheral rotational speed of 20 m/min, flocculent rock wool 12 Kp, silica sand 2xp with an average particle size of 60 mesh, and crushed pulp 2 with an average fiber length Q of 3 urn were prepared.
．． 5 KF? The mixture was mixed by rolling for 3 minutes, and the products having a particle size of 2 mm or more were collected by sieving to form granular rock wool having a core of rock wool and silica sand and surrounding it with crushed pulp.

Example 1 For 100 parts by weight of granular rock wool produced in Reference Example 1, 180 parts by weight of rhusium carbonate, parts by weight of flakes,
5 parts by weight of titanium white, granular cellulose sodium glycolate (
Particle size 16-60 mesh, bulk specific gravity 0.7g/cIft)
4 parts by weight and a small amount of preservative are uniformly mixed to form a formulation, which is then added to an acrylic styrene copolymer emulsion).
Naru Emuljoy Resin [Product name: ``Acronal 295''
DJ: manufactured by Yuka Pardish Co., Ltd.] 110 parts by weight were combined to produce a wall finishing material.

Next, the emulsion resin was mixed with 550 parts by weight of water, the mixture was added and kneaded with water, and when this was applied to the mortar base surface with a trowel, workability such as trowel elongation and trowel release was extremely good. On the dried surface, granular rock wool with a core of rock wool and pulverized pulp surrounding it remains, forming an embossed surface with a rich three-dimensional effect, and the emulsion resin is impregnated inside the granular rock wool to meet JISA6909 standards. Excellent water resistance and abrasion resistance were recognized in the wash resistance test based on
It was extremely strong with a score of 7 or higher.

Example 2 In Example 1, the same preparation as above was carried out except that the granular rock wool was replaced with that produced in Reference Example 2, and the emulsion resin was a vinyl acetate acrylic copolymer emulsion [trade name "Polysol PS-120J: When the same treatment was carried out using "Showa Kobunshi Co., Ltd.", the results were exactly the same, except that the embossing of granular rock wool on the finished surface was slightly less.

Reference Example 3 When the same preparation and treatment as in Example 1 were repeated using powdered cellulose sodium glycolate instead of granular cellulose sodium glycolate, the workability and three-dimensional appearance of the finished surface were almost the same. Although it was the same as the example, there was a small amount of emulsion resin impregnated into the granular rock wool on the drying surface, and a significant decrease in abrasion resistance and water resistance was observed in the wash resistance test.

Reference Example 4 When the same preparation and treatment as described above in Example 1 was repeated except for the granular cellulose sodium glycolate, workability such as trowel elongation and trowel separation was extremely poor, and the dried coated surface was smooth. The surface was undulating, and no three-dimensional effect was observed.

According to the wall finishing material of the present invention, all the base materials except the emulsion resin can be blended in advance, and when using it, the emulsion resin is mixed with a predetermined amount of water, and the pre-mixed formulation is added to the emulsion resin. By adding and mixing lightly, it can be applied by troweling or spraying, which greatly simplifies on-site work, and has practical effects such as imparting water resistance to the finished surface and allowing it to be applied to exterior walls that come into contact with rainwater. is remarkable.

Claims (1)

[Claims] 1. In a wall material using granular rock wool as an aggregate, cellulose sodium glycolate and acrylic styrene copolymer emulsion resin or vinyl acetate acrylic copolymer emulsion resin are used together as a glue, and the cellulose sodium glycolate is made into granules. A water-resistant wall finishing material characterized by suppressing its initial dissolution.