JP2005273147A - Floor and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a backing adjusting material superior in sticking to a wetting surface, and having the swelling preventive effect, by solving the problem of thinning the effect by reduction in sticking force in the wetting surface, though a resin waterproof material such as a painted floor and a strengthened resin floor is conventionally constructed for a floor requiring waterproof performance, dust-proofness and water resistance such as various factories, a warehouse and a parking garage. <P>SOLUTION: An primary coating layer composed of an aqueous epoxy resin is formed, and a middle coating layer composed of an aqueous urethane resin is formed as a filler after hardening. A floor finishing material such as a synthetic resin or a tile, a carpet and a flooring is formed on its layer when necessary. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention has good adhesion and is effective in preventing swelling even when various floors, for example, various factories and warehouses such as food factories, chemical factories, electronic parts factories, or parking lots have wet surfaces. The present invention relates to a certain floor structure and construction method.

A conventional method of applying a flooring material is to apply and impregnate a primer on the ground surface of cement concrete or cement mortar, and then coat a synthetic resin such as epoxy resin, urethane resin, or unsaturated polyester resin on the primer. A method is employed in which a material is applied to the entire surface with a predetermined thickness to form a seamless coating floor. (Patent Document 1)
However, in such a coated floor, when the ground such as cement concrete or cement mortar is not sufficiently dried, the moisture contained in the ground gradually rises under the coating film. Moreover, even if it is slow, after 2 to 6 months after curing, swelling due to a water pool occurs under the coating film, resulting in unevenness on the coating film surface.
As described above, the unevenness due to the swelling generated under the coating film is not only aesthetically unappealing, but also has a drawback of proceeding from the floating to peeling of the coating film.

Therefore, asbestos sheets, rock wool sheets, non-woven sheets of synthetic resin fibers, etc. are pasted on the entire base surface with an adhesive such as synthetic resin or synthetic rubber, and then synthetic resin or synthetic rubber coating agent A method is disclosed in which a resin is applied to a predetermined thickness by using a wrinkle or spray. (Patent Document 2)
By interposing the asbestos sheet, etc., even if moisture remains in the base, the moisture is absorbed by the sheet and diffused throughout the sheet. Although it can be prevented, safety, moisture diffusibility, water absorption performance, inexpensive provision, etc. could not all be satisfied.

Therefore, in a method of applying floor finishing materials such as tiles, carpets, flooring, painted floors, etc. on cement concrete and other concrete grounds, a polyester polyol having a molecular weight of 1000 to 3000 and having hydroxyl groups at both ends, and polyphenyl polymethyl After applying a water-based urethane resin cement composition composed of polyisocyanate and an aggregate containing hydraulic cement to make it flat, and if necessary, after forming an adhesive layer such as a synthetic resin or cement mortar, A method of forming a synthetic resin or a floor finish such as a tile, carpet or flooring is disclosed. (Patent Document 3)
However, although it is known that the above method has an effect of preventing blistering, the adhesion is reduced on the wet surface, and this effect is reduced.
JP 7-4014 A JP-A-6-49975 Japanese Patent Application No. 2004-020612

In the conventional resin floor construction, the present invention has a measure for shortening the construction period, a problem of blistering phenomenon, and various floors such as floors of various factories and warehouses such as food factories, chemical factories, and electronic parts factories, or parking lots. The present invention also relates to a floor structure having a good adhesion even in a wet surface situation and a construction method thereof.

In order to solve the above-mentioned problems, the present invention forms an undercoat layer made of a water-based epoxy resin, and an intermediate coat layer made of a water-based urethane resin as a post-curing seal, and if necessary, a synthetic resin or The conventional problems have been solved by a construction method for forming floor finishing materials such as tiles, carpets and flooring.

As the undercoat layer, a mixture of a water-based epoxy resin and a cement premix is used, and 0.2 to 1.2 kg / m 2 is applied as a general coating amount to the base surface by a wrinkle. .
The water-based epoxy resin is an epoxy resin typified by a so-called self-emulsifying type, or an epoxy resin that is mixed with a water-soluble curing agent and emulsified. For example, aggregates such as meteorite powder, calcium carbonate, cinnabar sand, alumina powder, glass powder and the like are used as necessary.

As the epoxy resin, known epoxy resins such as bisphenol type epoxy resins such as bisphenol A type and F type, novolak type epoxy resins and aliphatic epoxy resins can be used. As the curing agent, aliphatic amines such as triethyltetramine, and modified aliphatic amines thereof, aromatic amines such as polyamide amine and phenylene diamine, modified aromatic amines thereof, and the like are used. The mixing ratio of the water-based epoxy resin and the cement premix is suitably 1 to 3 to 10 in terms of solid content from the viewpoint of viscosity and workability.

Since the coating of the undercoat layer is superior in that it fills the burrow of the foundation concrete more than once, it is preferable to coat twice if there are no restrictions in terms of construction period, construction man-hours, etc. . It is applied to the substrate a plurality of times with an applicator such as a scissors, a brush, or a roller at least twice.

Since the undercoat layer is familiar with moisture and concrete components, it easily penetrates into the porous exposed surface of the concrete, fills the voids in the surface layer, and the cement premix adheres to the concrete of the same component. The effect of increasing the strength is brought about, and it can be firmly integrated by curing the epoxy resin.

The undercoat layer is applied to the floor base of concrete, foamed concrete, stone, etc., but it is necessary that the base be clean, free from cracks, not soaked in vegetable oil, mineral oil, etc. When there is dirt, it can be adjusted by means such as washing with a detergent, when there is a crack, filling with a cement compound, and with oil etc., washing with a neutral detergent.

After the undercoat layer is formed and cured, the intermediate coat layer is applied to a thickness of 0.1 to 1.0 mm as a general coating amount and finished. The intermediate coating layer functions as an underwater moisture blocking layer and is required to have excellent adhesion to the undercoat layer, and is suitable for use with urethane resin-based intermediate coating materials.

In the water-based urethane resin used as the intermediate coating material according to the present invention, the main component polyol is a polyester polyol having a molecular weight of 1000 to 3000 and having hydroxyl groups at both ends, and a preferred specific example is butylethylpropanediol (2-butyl -2ethyl-1,3propanediol) and adipic acid polycondensate, for example, Dismophen 1150 (manufactured by Sumika Bayer). The condensate has excellent hydrolysis resistance due to the molecular structure, and is easy to handle because it has a viscosity of 1 to 30 Pa · S at room temperature.

As the isocyanate compound of the curing agent, one containing polynuclear polyphenylene polymethyl polyisocyanate (hereinafter abbreviated as polymeric MDI) represented by the following general formula is suitable for use. As a specific product, Bayer: Sumijour 44V20, Nippon Polyurethane Co., Ltd .: MR-100, MR-200, etc.









Formula 1

Further, in order to further enhance the adhesive effect, the intermediate coating layer may be blended with hydraulic cement such as Portland cement, white Portland cement, high alumina content fast-curing cement or the like.

After the intermediate coating layer is cured, a synthetic resin topcoat layer or a floor finishing material such as a tile, carpet, or flooring is formed as necessary to ensure the finished appearance and weather resistance. Applying 0.1-0.6kg / m2 as a general application amount of paint with excellent weather resistance such as fluororesin, acrylic resin, acrylic silicone resin, acrylic urethane resin, unsaturated polyester resin as the top coat layer Is done. Furthermore, in terms of the finished appearance and the viscosity of the paint, if it is an overcoat layer mixed with flakes such as mica pieces, plastic pieces, metal pieces with a size of 1 to 10 mm, the surface layer and strengthening by the effect of shielding sunlight with the flakes Deterioration of the resin layer can be prevented.

If necessary, thickeners, fillers, leveling agents, antifoaming agents, dispersants and the like may be added to these resins to adjust the viscosity, curability, coatability, and the like suitable for construction.

In the construction method of the present invention, even when the construction period is shortened, the problem of blistering phenomenon and various floors such as food factories, chemical factories, electronic parts factories, etc. As a result, a floor structure having good adhesion could be obtained.

Example 1
Concrete with a water / Portland cement ratio of 0.7 was placed in a mold with a diameter of 200 mm and a height of 120 mm, and after 7 days of curing in the air (water content 9%), each construction test of the examples and comparative examples A test specimen was prepared by curing at 20 ° C. for 7 days.
As a first undercoat layer, 100 parts by weight of a compounding material prepared by blending 100 parts by weight of a water-based epoxy resin (JEX-110 manufactured by Aika Kogyo Co., Ltd.) with Portland cement No. 8 cinnabar at a weight ratio of 1: 1. After the blended material was applied with 0.2 kg / m 2 with a scissors and cured, as a second undercoat layer, 100 parts by weight of an aqueous epoxy resin (JEX-110 manufactured by Aika Industry Co., Ltd.) was added to 8 parts of Portland cement. 200 parts by weight of a compounded material prepared by mixing No. 1 sand with a weight ratio of 1: 1 was applied at 0.6 kg / m 2, and cured to form an undercoat layer.

Water-based urethane resin for intermediate coating, water-dispersible polyol Dismophen 1150 (manufactured by Sumika Bayer) 50 parts by weight surfactant lebenol (manufactured by Kao) 5 parts by weight dispersed in water 45 parts by weight 100 parts by weight of fat and oil polyol, 100 parts by weight of Polymeric MDI Sumidur 44V20 (manufactured by Sumika Bayer) as a curing agent, 100 parts by weight of Portland cement, and thoroughly stirred in a hand mixer, 3.5 slaked lime Part by weight and 200 parts by weight of silica sand having a particle diameter of 0.5 to 1 mm were added, and the mixture was further stirred to prepare the composition for the intermediate coating layer of Example 1. This intermediate coating composition was applied to the above-described undercoat layer at a density of 0.65 kg / m 2 and cured to form an intermediate coating layer.

Comparative Example 1
In Example 1, the floor of Comparative Example 1 was constructed in the same process and construction as Example 1 except that the undercoat layer was not constructed.

Comparative Example 2
In Example 1, the floor of Comparative Example 2 was constructed in the same process and construction as Example 1 except that the intermediate coating layer was not constructed.

Evaluation Method After subjecting the above-mentioned specimen as a dry surface topcoat layer to air-curing for 7 days and then placing Example 1 and Comparative Examples 1 and 2 on concrete that was allowed to stand at a temperature of 23 ° C. and a humidity of 60%, floor finishing materials As described above, a hard urethane resin coating material JJ-103 (manufactured by Aika Kogyo) was applied at a density of 1.2 kg / m 2 and further tested after curing for 7 days.
Furthermore, the test body prepared by the above method was immersed in 1 cm of the upper part of the test body in 35 ° C. of hot water, and the swelling state after 14 days was visually observed. The test results are shown in Table 1.

Wet surface After the above-mentioned specimens were cured in the air for 7 days, after being completely immersed in water at a temperature of 23 ° C. and taken out after 24 hours, the concrete of Example 1 and Comparative Examples 1 and 2 were applied to the concrete whose surface moisture had been wiped off. As a floor finishing material, a hard urethane resin coating material JJ-103 (manufactured by Aika Kogyo) was applied at a density of 1.2 kg / m 2 and further tested after curing for 7 days.
Furthermore, the test body prepared by the above method was immersed in 1 cm of the upper part of the test body in 35 ° C. of hot water, and the swelling state after 14 days was visually observed. The test results are shown in Table 1.

Table 1





○: No swelling △: Swelling occurs in a part of the coating film ×: Swelling occurs in the entire coating film

As shown in Table 1 above, in Example 1, no occurrence of blistering and a decrease in surface smoothness of the coated floor were observed. On the other hand, in Comparative Examples 1 and 2, many blisters and irregularities were observed on the entire surface of the coated floor.
As described above, the construction of the undercoat layer and the intermediate coat layer prepared in Example 1 could prevent a rise in moisture from the base concrete and obtain a floor finish material in which the occurrence of swelling was suppressed. Needless to say, the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the scope of the present invention.

Claims (3)

An undercoat layer made of water-based epoxy resin, an intermediate layer made of water-based urethane resin as a seal after curing, and a floor finish material such as synthetic resin or tile, carpet, flooring, etc., if necessary. A floor characterized by that. Form an undercoat layer made of water-based epoxy resin and an intermediate layer made of water-based urethane resin as a post-cure seal, and then form a floor finish such as synthetic resin or tile, carpet, flooring, etc., if necessary. The construction method characterized by doing. The water-based urethane resin according to claim 1 or 2, wherein a polyester polyol having a molecular weight of 1000 to 3000 and having hydroxyl groups at both ends, an aggregate containing polyphenylpolymethylpolyisocyanate and hydraulic cement are blended. A water-based urethane resin cement composition.