JPH064501B2 - Self-leveling floor surface forming composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention can be applied to an underground surface to easily obtain smoothness,
The present invention relates to a composition for forming a self-leveling floor surface which is a tough floor finish surface.

(Prior Art) Conventionally, by mixing a polymer emulsion with cement mortar and improving properties such as tensile weakness and brittleness in the case of only cement mortar and improving properties such as toughness, adhesiveness and waterproofness, cement mortar It is known to provide some flexibility. Such a mixture of conventional cement mortar and emulsion was generally used as a non-planar correction material for outer walls and floor substrates, but recently it has come to be used for exterior materials, ceiling materials, floor materials, etc. There is. This is because the conventional flexible materials were flammable organic substances such as acrylic and gol latex, whereas cement mortar is inorganic and acts as a kind of non-combustible filler, and the above mixture is a flame-retardant flexible material. This is because it has the property of being a material, and because it is an inorganic material, it has excellent weather resistance and excellent waterproof properties.

However, in the above mixture, the mixing ratio of the polymer of the emulsion to the cement is usually limited to about 15 to 20% by weight, and if more than this is added, the hydration reaction of the cement will be impaired or delayed. However, there is a problem in that the amount of emulsion added must be limited in order to secure an appropriate setting time for the cement, and as a result, sufficient flexibility and the like cannot be obtained.

Further, a polymer emulsion in which a water-soluble polymer is used as a protective colloid to make the inhibition or delay of the hydration reaction relatively mild is disclosed in JP-A-58-55355 and the like. The cement slurry mixed with the prepared emulsion has a high viscosity of slurry due to the presence of the water-soluble polymer and exhibits thixotropic viscosity. Etc., or because it has water resistance, it is provided for waterproof cement mortar.

(Problems to be solved by the invention) By the way, a floor surface requiring finish smoothness requires self-leveling property and at the same time hardenability for good construction workability. Polymer cement slurries are desired, but the application of water-soluble polymer emulsions for this purpose has not been developed.

However, the toughness, adhesion, and
Water resistance and the like are also useful as a floor surface, and it is preferable to be able to simultaneously solve various processing problems and provide the above-mentioned undeveloped composition for forming a self-leveling floor surface.

As a result of earnest studies to solve various problems at the same time, the present invention can be made into a self-leveling floor surface-forming composition by mixing a polymer emulsion having a specific composition. I found that.

(Means and Actions for Solving Problems) That is, an admixture for obtaining a composition for forming a floor surface which achieves the above-mentioned object is a mixture containing substantially no anionic surfactant and a hydroxyl group in the molecule. A synthetic resin eljon obtained by emulsion polymerization in the presence of a nonionic aqueous polymer.

What was emulsion polymerized using an anionic surfactant,
Mixing with a hydraulic composition such as cement tends to make the viscosity of the paste paste unstable, and the addition of various viscosity stabilizers is not suitable because it inhibits or delays the hardening of the hydraulic composition. Also, emulsion polymerization using a nonionic water-soluble polymer having a hydroxyl group in the molecule can satisfy each performance as a flooring material. Examples of the water-soluble polymer include various hydroxyethyl cellulose derivatives, various polyvinyl alcohol derivatives, various polyethylene oxide derivatives, various starch derivatives and the like.

However, in the above case, other ionic surfactants may be used together, if necessary, within a range that does not cause adverse effects such as inhibition of cement hydration reaction and deterioration of fluidity of the compound paste.

The polymer dispersed in the emulsion is not limited as long as it is mixed with various hydraulic compositions to satisfy the performance as a floor surface, but generally it is necessary to form a film at room temperature, for example, acrylic. Examples thereof include acid ester, styrene, vinyl acetate, veova, ethylene, vinyl chloride, and diene-based monomers which are homopolymers or copolymers.

The mixing ratio of the emulsion obtained by emulsion polymerization to the hydraulic composition is 50 to 100 as resin solid content.
Weight% is preferable, and about 80 weight% is the most preferable. If it is about 50% by weight or less, there is a risk of cracking after curing, and if it is 100% by weight or more, the cost is heavy in terms of economy.

When the above emulsion is mixed with a hydraulic composition such as cement and applied, the emulsion is generally hardened by absorption of water in the dispersion medium to the substrate and evaporation from the coated surface, and water absorption hardening of the hydraulic composition. In addition to the dehydration effect by the above, since the emulsifier has a composition that eliminates the curing inhibitor of the hydraulic composition as described above, even if the polymer ratio to the hydraulic composition is about 1 to 1, The hydration reaction of the product is not hindered, and therefore, the curing reaction of such a mixed composition can be accelerated, and the inside can be easily cured even when it is applied thickly. This applies not only when Portland or white cement alumina is used, but also when a hydraulic composition such as alumina or early cement is used. Moreover, in this case, since the required amount of emulsion is mixed, the characteristics such as toughness, adhesiveness, and waterproofness can be fully utilized.
Even after curing, the flexibility of the composition is properly ensured. Further, since the leveling property of the paste is good, a smooth surface can be formed, and the work for finishing can be omitted.

The mixed composition according to the present invention as described above can be applied by a single-head or multi-head gun blowing method by appropriately adding aggregates, pigments, additives and the like. For example, if the background is formed with the blue color of the acrylic resin pigment with a single-headed gun, then the pattern is blown with white, and then the back-blowing is performed with the same blue color as the background color, the flow characteristics are also combined. It is possible to bring out a floor with a patterned surface that has an excellent color sense and has a complex and mild luster that blends colors appropriately. According to the multi-headed gun, the composition of different color can be simultaneously sprayed from the heads of each gun due to the good fluidity, and the unique color mixing bed can be easily constructed.

According to the present invention, as described above, it is possible to form an elastic floor with a floor surface forming material that is an inorganic material and has very good flexibility, and the curing rate is fast and the self-leveling property is excellent. It is possible to provide a composition for forming a self-leveling floor surface which is extremely excellent.

(Examples) Table 1 Examples 1 to 3 of polymer cement slurries obtained by blending emulsions obtained by emulsion polymerization according to the present invention, and emulsions with emulsifiers different from the present invention to compare with these. The slurry properties, the cement hardening time, and the coating surface properties of the polymer cement slurries in which the ratios of 1 and 2 were compared were examined. The results are shown in Table 1.

The test method was adjusted by spraying with water to an appropriate viscosity, and the viscosity and thixotropy index were measured using a B-type rotational viscometer No. 3 rotor, and the flow value was an inner diameter of 50 mm placed on a glass plate, After filling a 50 mm high PVC pipe with the sample, the pipe was immediately withdrawn and the spread was measured by the diameter. The surface property of the coating film is visually evaluated, and ○ is good, Δ is slightly good,
X was bad.

As a result, a composition having sufficient suitability as a floor surface-forming composition as a comprehensive judgment, that is, having suitable flammability, having smoothness by self-leveling property, and having an appropriate curing time,
It was one of Examples 1, 2, and 3 according to the present invention. Comparative Examples 1 and 2 could not be put to practical use. still,
In Comparative Example 2, the paste viscosity increased in about 10 minutes.

-About Table 2 Using the emulsion of Example 3 according to the present invention, changing the compounding ratio of the polymer cement, the respective slurry properties,
Table 2 shows the results of examining the cement hardening time and the coating film surface property.

As a result, it was confirmed that the polymer cement ratio, that is, P / C, is preferably 50 to 100% by weight, because cracks occur when the amount is clearly less than around 50% by weight. The hardness as a floor was also sufficient. It should be noted that when the amount of the filler was too large, cracks occurred, and Sample 4 having a high P / C had a large amount of resin and had an elastic feeling as a floor.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location C04B 24:38 Z 2102-4G 24:26 F 2102-4G G 2102-4G C 2102-4G A 2102 -4G) Z 2102-4G (56) Reference JP-A-57-71842 (JP, A) JP-A-59-146960 (JP, A) JP-A-59-203742 (JP, A) JP-A-58- 138764 (JP, A)

Claims (1)

[Claims] 1. A synthetic resin emulsion obtained by emulsion polymerization in the presence of a nonionic water-soluble polymer having substantially no anionic surfactant and having a hydroxyl group in the molecule,
A composition for forming a self-leveling floor surface, which is obtained by mixing an inorganic hydraulic composition at a resin solid content of 50 to 100% by weight.