JP2000264711A - Production of putty material for surface preparation in application of wall covering material and flooring material hardened by use in combination with hardening accelerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a putty material for surface preparation which is not hydrated even by kneading with water, prevents trouble in hardening time by combination with a special hardening accelerator and can be hardened and dried in a short time when it is applied to a substrate by blending gypsum which hardens by hydration reaction with a synthetic resin which does not promote the hydration reaction, an inorganic filler, a pigment, etc. SOLUTION: The putty material does not harden in a kneaded state using water and a special hardening accelerator is used so that the putty material causes hardening reaction immediately after contact with the hardening accelerator and can be hardened and dried in a short time (1 hr). Since hemihydrate gypsum as the principal stock of the putty material has defects such as structural viscosity unsuitable for the putty material when it is kneaded with water, working properties are improved by adding a pH adjusting agent, a structural viscosity improver and a water retaining agent. The hardening accelerator is produced as a mixed fluid and a paste comprising a water-soluble adhesive which sticks to a substrate and ensures good compatibility with the putty material in a pasty state and potassium sulfate, calcined ammonium alum or the like as a hardening accelerator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of applying a special curing accelerator to a coating portion of a base adjustment putty material, which is not cured when kneaded with water (paste form), and then to apply it on the coating portion. Is an invention that can be cured and dried in a short time. Therefore, the pot life can be sufficiently secured, the putty application work has a margin, the accuracy of the putty work and the shortening of the construction period, the provision of technology such as the use of a mechanical putty application work, and the provision of this technology are also possible. Can be applied to the production of adhesives and contributes to technologies that can be widely used in the construction field.

[0002]

2. Description of the Prior Art A conventional putty material for adjusting a base material for a wall covering is made of gypsum as a main raw material, and is manufactured in a type having a different hardening time depending on the amount of a retarder added. They were selecting the type and performing putty work.

[0003]

In the prior art putty material for adjusting the foundation, a type having a different curing time was selected and used depending on the construction conditions. Such as hardening while working with materials,
Conversely, problems such as peeling and the like have been problematic due to delays in construction due to the use of a type having a long curing time and a dry-out phenomenon caused by poor curing of the base adjustment putty material.

An object of the present invention is to provide a base adjustment putty material which can be worked without considering the curing time of the base adjustment putty material, eliminates troubles in the curing time, and can be cured and dried in a short time when applied to the base material. The purpose is.

[0005]

In order to achieve the above-mentioned object, the undercoat adjusting putty material of the present invention is prepared so as not to be cured in a state of being kneaded with water, and is subjected to a curing reaction immediately upon contact with a curing accelerator. Then, a dedicated curing accelerator capable of curing and drying in a short time (1 hour) is used.

[0006] Gypsum hemihydrate gypsum, which is the main raw material of the putty material for land adjustment used to maintain the above quality, has a drawback such as structural viscosity that does not match with the putty material when kneaded with water.
Workability is improved by adjusting pH, adding a structural viscosity improver, and a water retention agent.

[0007] In addition, the dedicated hardening accelerator adheres to the base and is mixed with a water-soluble adhesive and a mixed solution of potassium sulfate, ammonium alum, etc. as a hardening accelerator so as to be compatible with the paste-like putty material. I decided to create two types of shapes.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Even if the putty material for adjusting the underlayer constituted as described above is kneaded with water and allowed to stand at room temperature and normal humidity specified in JIS8703 for 24 hours, the pH is adjusted and the effect of the water retention agent is used. It is possible to confirm that the coating is possible, and when the putty material for base adjustment is applied by the action of a special curing accelerator previously applied to the putty application section, it cures for a short time.

[0009]

Example: 600 g of hemihydrate gypsum (dried), 150 g of calcium carbonate, 135 g of talc, powder synthetic resin 5
5 g, methyl cellulose 5 g, acetate, and a mixture of 50 g of calcium carbonate and 4 g of pigment mixed in advance with a high-speed mixer were mixed well for 30 minutes with a ribbon mixer to produce a putty material for adjusting the foundation according to the present invention. (We will use a powder-curing base material adjustment putty material.)

To 100 parts of the powder-curable base adjustment putty material, 45 parts of water, a viscosity modifier, and 1 part of a preservative were thoroughly stirred to produce a paste-like hardening base adjustment putty material.

A 10% aqueous solution of polyvinyl alcohol 1
1 kg of a 10% aqueous solution obtained by mixing potassium sulfate and baked ammonium alum in a ratio of 1: 1 to the resulting mixture was produced as a curing accelerator (undercoat) for a powder-curable base material adjustment putty material.

Potassium sulfate, calcined ammonium alum,
0.5 kg of 1: 1 10% aqueous solution, 1 kg of gypsum dihydrate, 0.3 kg of calcium carbonate, 0.03 k of methylcellulose
g and a small amount of pigment were sufficiently stirred to produce a paste-type curable base adjustment putty material and a powder-curable base adjustment putty material, and were used as a type-setting accelerator.

Since the present invention is manufactured and configured as described above, it has the following effects.

[0014] A paste-like (putty material kneaded with 45 parts of water with respect to 100 parts of a powder-curable base adjustment putty material) is put on the surface of the putty material at room temperature and normal humidity specified in JIS8703 to evaporate moisture. In order to prevent this, it was covered with vinyl, and a repeated setting test was carried out for 7 days by the operation of JISA 6904. As a result, it was confirmed that the resin was not cured.

Flexible plate (about 70 × 70 × 6 mm)
50 g / cm ^{2 of a} 1: 1 water dilution of a curing accelerator for a powder-curable base adjustment putty material is applied to the smooth surface of the paste-like putty material to a thickness of about 1.5 mm after 1 hour and 1 day. After being applied and dried for one hour each, the hardness was tested using a Martens scratch hardness meter specified in JIS A6904I. As a result, the hardness was higher than the result measured after the set curing time of the conventional set gypsum putty material. I was able to.

V-joint (5 mm wide, 5 m deep)
m), and about 50 g / cm ² is applied to the bottom portion of the V in a dotted line, and a width of about 5 cm and a thickness of about 1.5 mm are applied from above.
As a result of applying a paste-like putty material to the same and performing the same hardness test as the above test, it was possible to show high hardness. 5
For the paste-like putty material to which% was added, curing was confirmed in about 1 hour.

Regarding the strength of adhesion to the overlay, see JI
According to 5.2 of SA6922 (starch adhesive for wallpaper application), two types of special hardening accelerators are applied to a flexible board in the same manner as above, and after drying for 1 hour, the applied thickness is reduced to 1.5 mm. The putty material in the form of a paste was applied, dried for 1 hour, an adhesive for overlay was uniformly applied thereon, and a cotton cloth was immediately attached and compressed five times with a 1 kg hand roller. Thereafter, it was dried at room temperature for 48 hours to obtain a test specimen. The dried specimen was cut to a width of 25 mm, and the peel strength was measured at a pulling speed of 200 mm at 180 ° using an autograph tester manufactured by Shimadzu. As a result, it was confirmed that the specimen reached the specified value of JIS.

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Claims (1)

[Claims] 1. A gypsum that hardens by a hydration reaction is mixed with a synthetic resin, an inorganic filler, a pigment, etc. that does not promote the hydration reaction, and the hydration reaction does not proceed even when kneaded with water. A method for producing a putty material for adjusting the foundation of wall coverings and flooring materials, in which a hydration reaction proceeds in a short time and is cured when used in combination with a curing accelerator.