JPH0465336A - Wall plaster admixture for building - Google Patents

Abstract

PURPOSE:To prevent cracking by using two kinds of granular insulator powders having different grain diameters and consisting essentially of the vinyl chloride- based resin or chlorinated vinyl chloridebased resin contg. an inorg. filler other than asbestos. CONSTITUTION:Two or more pts.wt. of an inorg. fiber such as glass fiber having >=1mum average length or >=198 pts.wt. of an inorg. granular material of CaCO3, etc., having 0.01-300mum average grain diameter is mixed as an inorg. filler other than asbestos with 100 pts.wt. of PVC alone or a vinyl chloride-based resin such as a vinyl chloride copolymer contg. >=50wt.% vinyl chloride or a chlorinated vinyl chloride-based resin such as chlorinated PVC or vinyl chloride-based copolymer. These resin compositions are expanded by 50-200 times and then crushed to obtain a large-diameter granular insulator powder having 2.0-10mm grain diameter and a small-diameter granular insulator powder having 0.10-1.5mm grain diameter. The two kinds of powders and an admixture are mixed in 1/2-3/4 volume ratio, or the powdery adhesive such as PVA and an admixture are mixed in 3/100-10/100 volume ratio to obtain a mixture. The mixture is mixed with cement and water to obtain a cement mortar.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a wall coating admixture for buildings, and in particular, when mixed with cement and used as cement mortar, it exhibits an excellent function as ft+4 and is fire resistant. 11 - Relates to a wall coating admixture for buildings that is excellent in properties, strength, workability for wall coating with mortar, etc.

Technical Background of the Invention Cement mortar for plastering is mixed with aggregate or cement in order to maintain its shape. Traditionally, this phrenology includes
Natural sand has been used, but in recent years, due to the depletion of sand sources,
Instead, they tend to be mixed into cement or admixtures based on Styrofoam granules that act as aggregates.

However, such admixtures were considered to be mere bulking agents, so they were not considered to be effective in improving the properties of mortar, such as fire resistance, crack prevention, strength, and mortar wall coating workability (specifically, , adhesion to the base,
Not much consideration was given to the spreadability of the iron. Recently, various attempts have been made to improve the properties of admixtures in order to improve the properties of this mortar.

For example, since the above-mentioned polystyrene foam has extremely poor fire resistance, it has been proposed to mix granules of fire-resistant foamed asbestos calcium carbonate into the admixture (
Special Publication No. 59-341.44).

However, in recent years, the use of materials made from asbestos has been discouraged due to concerns that it may have an adverse effect on the human body. Therefore, the above-mentioned proposal is unrealistic.

It has also been proposed that the above-mentioned asbestos calcium carbonate foam be sawed to produce granules with a particle size that can be hidden, and that this be used as the main material of the admixture (Japanese Patent Publication No. 62-561
．． 1.4 Publication). This not only improves fire resistance, but also allows the granules to shrink during drying and shrinkage of the mortar, thereby preventing the occurrence of cracks.

However, the particle size of this granular material is relatively large, and relatively large gaps are formed between the particles of the granular material. Therefore, a large amount of kneading water is required to ensure a predetermined fluidity.

As a result, the shrinkage rate of the mortar was large during drying, and the possibility of cracking was actually high, and the strength of the mortar was relatively weak.

From the above, various attempts have been made to improve the individual characteristics of admixture 1A, but none has been proposed that is suitable as 'G and f' for mortar from all viewpoints.

Purpose of the Invention The present invention was made in view of the above circumstances, and provides a wall coating admixture for buildings that is suitable from all points of view, and more specifically, exhibits excellent functionality as an aggregate. The object of the present invention is to provide a wall coating admixture for buildings that has fire resistance without adversely affecting the human body, has excellent crack prevention properties, strength, and workability for wall coating with mortar.

Summary of the Invention In order to achieve the above object, the building wall coating admixture according to the present invention comprises a large-diameter granular heat-insulating abrasive powder with a particle size of 2.0 to 10 mrD, and a large-diameter granular insulating powder with a particle size of 0.10 to 1 mrD. .5 ml of small-diameter granular insulation powder, and both granular insulation powders each produce a hinyl chloride resin or a chlorinated vinyl chloride resin containing an asbestos-free inorganic filler. Minutes of resin light
It is characterized by consisting of an envelope.

Preferably, the resin foam is made of a quasi-nonflammable or higher resin foam that contains a large amount of inorganic filler.

Further, the admixture according to the present invention may contain a powdered adhesive.

The admixture according to the present invention has sufficient fire resistance because it contains granular heat insulating material made of a material that is preferably semi-nonflammable or higher and whose main component is a vinyl chloride resin or a chlorinated vinyl chloride resin. be able to demonstrate Furthermore, this granular heat insulating material does not contain asbestos, so it does not have any adverse effects on the human body.

Moreover, since this granular heat insulating material has two types of particle sizes, the particles are appropriately mixed, and the gaps between the particles are reduced. Therefore, sufficient fluidity can be ensured even with a relatively small amount of kneading water. As a result, when the mortar dries and shrinks, its shrinkage rate is small, which reduces the possibility of cracking, and also makes the mortar relatively strong. In this way, the granular heat insulating material can exhibit excellent functions as a single material.

In addition, regarding the workability of wall coating with mortar, since the granular heat insulating material is composed of two types of particle sizes, fluidity is sufficiently ensured and workability of troweling is improved.

In particular, if a powdered adhesive having a function as a thickener or a spreading agent is mixed into the admixture, the adhesion to the substrate is further improved. In addition, due to the function of this powdered adhesive as a spreading agent, it is easily absorbed by water and cement, is kneaded uniformly, and further improves fluidity.

DETAILED DESCRIPTION OF THE INVENTION The wall coating admixture for buildings according to the present invention will be specifically described below.

A wall coating admixture for a building according to an embodiment of the present invention includes two types of granular heat insulating powder having different particle sizes and preferably a powder adhesive.

First, the granular heat insulating material powder will be explained.

The shape of the granular heat insulating material powder is not particularly limited, and may be, for example, substantially spherical, elongated, cubic, flaky, or a mixture thereof.

Such granular heat insulating material powder may be, for example, a pulverized product of quasi-incombustible or higher quality, or a pulverized product of cutting waste or surplus material generated during the production of foam products. Resin products including foam products are obtained by forming a preformed product made of a material as described below and cutting it into a predetermined shape, but at this time, a large amount of cutting waste and surplus material are generated. Therefore, it is particularly preferred industrially to use the cutting waste and the pulverized portion obtained by pulverizing the surplus material as granular heat insulating material powder because it eliminates waste of materials and is economical. In this case, the granular heat insulating material powder becomes a mixture of granules having various shapes such as flakes and approximately spheres.

Such granular heat insulating material powder is composed of particles of two types of particle sizes: small diameter and large diameter. The particle size of the small particles is 0.1 to 1.5 mm, preferably 0.15 to 0.6 mm.
mm, and the diameter of the large particle is 15 to 10 mm, preferably 30 to 6.0 mm. The ratio of large diameter particles to small diameter particles is preferably large diameter particles small diameter particles =
It is 55 to 28, more preferably about 37.

Granular insulation (semi-nonflammable or higher in powder means semi-nonflammable or non-combustible, respectively.
28, the present invention uses a resin material containing a vinyl chloride resin containing an inorganic filler or a chlorinated vinyl chloride resin as a product component as a semi-nonflammable or higher granular heat-directing material powder. A finely ground version of the shell is used.

For example, a foam insulation material has a compressive strength of 2.3.
kg/cm2 or more, has a bending strength of 3.0 kg/cm2 or more, has excellent mechanical strength, and has a heat transfer coefficient of 0.0 kg/cm2 or more. 04 kcal/m-hr-'C or less, excellent heat insulation, water absorption rate of 0.1 g/100 cm2 or less, excellent water resistance, and moisture permeability coefficient of 0.04 kcal/m-hr-'C or less. 03g/m2・hr・mmHg or less, and has excellent moisture resistance.

The vinyl chloride resin (hereinafter referred to as PVC) used in the semi-nonflammable or higher granular insulation material is polyvinyl chloride alone or chlorinated vinyl chloride-vinyl acetate copolymer containing 50% by weight or more of vinyl chloride. Vinyl copolymers or thermoplastic polyurethane, acrylonitrile-butadiene copolymer, chlorinated vinyl chloride resin, chlorinated polyethylene, methacrylate-acrylate copolymer, ethylene-vinyl acetate copolymer, chloride Examples include a mixture of a vinyl-vinylidene chloride copolymer and at least one resin that is compatible with polyvinyl chloride, and the polyvinyl chloride in the mixture accounts for 50% by weight or more.

On the other hand, chlorinated vinyl chloride resin (hereinafter referred to as Cl vC) is not only a resin obtained by chlorinating the above-mentioned PVC, but also
Bullet resins that are compatible with this CPVC, such as vinyl chloride resins, vinyl chloride-vinyl acetate copolymers,
Thermal E+J plastic polyurethane, acrolonitrile-phtatsuene copolymer, chlorinated polyethylene, methacrylate-acrylate copolymer, ethylene-vinyl acetate 1. Polymer, vinyl chloride-hynylidene chloride polymer itself, a mixture with at least one or more of the following,
This concept also includes those in which the amount of the blending resin in the mixture is 50 weight Q9° or less.

As the vinyl chloride resin to be chlorinated, in addition to PVC as described above, a copolymer containing 50 weight percent or more of a vinyl chloride resin can also be used.

The chlorination method may be any conventionally known method, and for example, a chlorination method under ultraviolet irradiation is suitably used.

Further, examples of the inorganic filler contained in the granular heat insulating powder include inorganic fibrous materials and inorganic granular materials.

Among these, the inorganic fibrous material is exposed to a high temperature of 2M4.
Good volume retention effect.

This is because the inorganic fibrous material is intertwined with each other to form a network in the foam, and is therefore presumed to have excellent shape stability.

Examples of the inorganic fibrous material include glass fibers with an average fiber length of 1 μm or more, preferably about 10 μm to 50 mm;
Rock wool, class fiber, ceramic fiber, alumina fiber, carbon fiber, quartz fiber, boron fiber, various metal fibers,
Various types of voice fibers may be mentioned, and these fibers may be used alone or in combination of two or more types. However, when foaming a resin containing these inorganic materials, rock wool is most preferred from the viewpoints of ease of foam molding, various properties of the resulting foam, safety to the human body, cost, etc. Inorganic particulate materials include talc, calcium carbonate, aluminum hydroxide, magnesium hydroxide, zinc oxide, mica, bentonite, clay silica, etc. with an average particle diameter of 0.01 to 300 μm, preferably 0.1 to 100 μm. suitable.

Further, hollow bodies such as white glass balloons can also be used as the inorganic particulates.

These inorganic fillers may be used alone or in combination of two or more.

The content of such an inorganic filler is determined by considering the amount of cracks contained in the resin material, the expansion ratio and cost when foaming the resin material, but usually P V
It is desirable that the amount of inorganic fiber is 2 parts by weight or more, preferably 5 parts by weight or more, and more preferably 10 parts by weight or more, based on 100 parts by weight of C and/or CPVC. Regarding the inorganic particulate matter, the amount is preferably 198 parts by weight or more, more preferably 300 parts by weight or more.

As the content of the inorganic filler increases, the obtained granular heat insulating material approaches non-flammability from semi-nonflammability.

P used as semi-nonflammable or higher granular heat insulating material of the present invention
VC foam or CPVC foam is made by using a specific solvent to contain a large amount of rock wool, etc., which does not cause any hygiene problems.
The same product that enables high foaming! (The parable that is the wish of an iI'i person is an international application 1) CT / J I) 89 / 0
[) 362 specification unit or JP-A-63-284
It is manufactured by the method disclosed in Japanese Patent No. 645.

When foaming these resin materials containing an inorganic filler, the expansion ratio is preferably 50 times or more, and when considering the amount of heat generated during combustion, amount of smoke, and redness,
Furthermore, it is desirable that the foam has a high expansion ratio, preferably 60 times or more, more preferably 80 times or more. However, if the expansion ratio exceeds 200 times, it is difficult to produce a normal foam, and even if a good foam is obtained, the physical properties such as strength will be insufficient. It is preferable that it is 200 times or less.

Resin materials, especially foams, used to make up semi-nonflammable or higher granular heat-insulating powder have superior performance compared to glass wool, etc., in terms of thermal conductivity, compressive strength, water absorption, and workability. Moreover, it exhibits excellent functions in terms of heat insulation and fire resistance.

Next, the powdered adhesive will be explained.

The second powder adhesive is applied to three particles of granular heat-insulating powder, and polyvinyl alcohol, methyl cellulose, carboxylic dimethyl cellulose, etc. are used as the powder adhesive. functions as a spreading agent and a thickening agent.

From the above, when this powdered adhesive is added to the granular heat-insulating abrasive powder as an aggregate and stirred, a wall coating admixture according to an embodiment of the second invention is obtained. When this admixture is mixed with cement and water, cement mortar is obtained.

Here, the ratio of the volume of the granular heat insulating material to the total volume of the admixture is: Volume of the granular heat insulating material/total volume of the admixture - 1/2 to 3/4, and the ratio of the powder adhesive to the total volume of the admixture is: The volume ratio is: Total volume of powdered adhesive/admixture - 3/1. OO~], O/100.

Furthermore, the volume ratio of admixture to cement is admixture:cement=1.1 to 3.1.

When the admixture according to the present invention is mixed with cement and water and applied to the base of a building as a base cement mortar and dried, a granular insulation material as an aggregate, particularly a large diameter granular insulation material, is formed. It is exposed in a shape and has an uneven surface. Therefore, there is no need to comb it for topcoating.

Since the second granular heat-insulating key has the above-mentioned physical properties, it can exhibit sufficient fire resistance without adversely affecting the human body. Furthermore, is this granular insulation material two types of granules? Since it has Y, the particles are mixed properly and the gaps between the particles are reduced. Therefore, sufficient fluidity is ensured even with a relatively small amount of kneading water. As a result, when the mortar dries and shrinks, its shrinkage rate is small, reducing the possibility of cracking and making the mortar relatively strong. In this way, the granular heat insulating material can exhibit an excellent function as an aggregate.

Furthermore, regarding the workability of mortar for wall coating, since it is mixed with a powdered adhesive or admixture that functions as a thickener, its ability to stick to the base is sufficiently ensured. In addition, this powder sandwiching is also caused by water and cement [-
It smears easily, is kneaded uniformly, and improves fluidity. Furthermore, since the granular heat-insulating key has two different particle sizes, sufficient fluidity is ensured, and sufficient elongation with a trowel is also ensured.

Furthermore, this powdered adhesive can also prevent the admixture from scattering due to wind.

As described above, the present invention provides a wall coating admixture for buildings that is suitable from all viewpoints.

It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the present invention.

As described in detail, the wall coating admixture for buildings according to the present invention can exhibit sufficient fire resistance without adversely affecting the human body due to the granular heat insulating material. In addition, this granular insulation material has two types of particle sizes of H, so when the mortar dries and shrinks, the shrinkage rate is small, reducing the possibility of cracking, and the mortar is relatively strong. I can do something. In this way, the granular heat insulating material can exhibit an excellent function as an aggregate.

Furthermore, regarding the workability of mortar wall coating, the powdered adhesive with the function of a thickener ensures sufficient adhesion to the base, and the granular insulation material has two particle sizes. As a result, sufficient liquidity is ensured, and sufficient ties and ties are secured through trowels.

[Examples] The present invention will be described below based on more specific examples, but the present invention is not limited to these examples.

Example 1 "Varilac" (manufactured by Kanebuchi Chemical Industry ■; registered trademark) made of a semi-nonflammable or higher foam material whose main component is asbestos-free inorganic filler-containing vinyl chloride resin or chlorinated vinyl chloride resin. First, prepare 2.1 g of large-diameter granular insulation material powder with an average particle size of 4 + nm composed of ``Harilac'' and 0.9 g of small-diameter granular insulation material powder with an average particle size of 0.3 mm, which is also composed of "Harilac". did.

Add 3Ω of cement and approximately 1.2g of water to these insulating powders.
and mixed to obtain cement mortar.

Example 2 2.4 g of large-diameter granular insulation material powder with an average particle size of 4 mm composed of "Harirac" (manufactured by Kanebuchi Kagaku Gyokugyo, registered trade area)
Also, the average particle size is 0.
First, 0.6 g of small-diameter granular cutting wood powder of 3 mm was prepared.

3 g of cement and about 12 g of water were mixed with these heat-insulating powders to obtain a cement mortar.

Reference Example: As an admixture, an average particle size of 0 was composed of “Harilac”.
．． 3 g of this admixture, 3 g of cement, and 1.2 F of water were mixed using a 3 mm/mm heat-insulating powder to obtain a cement mortar.

Comparative Example 1 Large-diameter granular insulation material powder with an average particle size of 4 mm composed of "Harirac" (manufactured by Kanebuchi Chemical Industry ■, registered trademark) 2.25
A cement mortar was obtained by mixing 1.5 g of cement and about 0.6 g of water with N.

Comments: (1) In terms of elongation with a plastering trowel, Example 2 was the best compared to Reference Example 1, followed by Example 1.

(2) The cement mortar of Comparative Example 1 had a lot of powder and became dry, and when water was added, there was a risk of poor adhesion or cracking.

Patent applicant Kanebuchi Chemical Industry Co., Ltd.

Claims (1)

[Scope of Claims] 1) A large-diameter granular heat-insulating material powder with a particle size of 2.0 to 10 mm and a small-diameter granular heat-insulating material powder with a particle size of 0.10 to 1.5 mm; A wall coating admixture for buildings, characterized in that the wood powder is made of a resin foam whose main component is a vinyl chloride resin or a chlorinated vinyl chloride resin, each containing an asbestos-free inorganic filler. 2) The building wall coating admixture according to claim 1, further comprising a powder adhesive. 3) The wall coating admixture for buildings according to claim 1 or 2, wherein the resin foam is made of a material that is quasi-nonflammable or higher.