JP3083191B2 - Unsaturated polyester resin lining method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to waterproofing of roofs, floors, walls, etc., waterproofing of exposed heavy walking such as rooftop parking lots, paved roads,
The present invention relates to lining methods such as pavement finishing work for sidewalks and verandas, and surface protection work for industrial plants, viaduct walls, marine structures, and the like.

[0002]

2. Description of the Related Art Conventionally, when lining an inorganic surface typified by concrete or stone such as a building or a building, a primer is applied before the lining material is applied.
A technique for improving the adhesiveness is known. For example, the "Synthetic polymer floor finishing construction guideline" issued by the Architectural Institute of Japan mentions one-pack polyurethane, epoxy resin, and unsaturated polyester resin as primers.

When an unsaturated polyester resin primer is applied directly on an inorganic construction surface, it is difficult to apply the primer layer and the lining layer at the same time, or if the surface of the construction surface (construction base surface) has a high water content, the base material may be damaged. There is a problem of poor curing near the interface, and even if excellent adhesive strength is obtained in the early stage, the adhesive strength drops sharply when the construction surface such as under the hot weather in summer is exposed to high temperature, and the peel resistance is poor. There's a problem. When a urethane resin is used as a primer, it is difficult to apply the primer and the lining material at the same time,
C.), there is a problem that a sufficient adhesive strength cannot be obtained due to a foaming phenomenon of the primer and the like.

In general, it is known that a room temperature curing two-pack type epoxy resin has a high adhesive strength to an inorganic base and has a high adhesive strength even when the base surface of the work is highly moist. However, when an epoxy resin is used as a primer for the unsaturated polyester resin lining material, if the unsaturated polyester resin lining material is re-applied early after touching the primer, the epoxy resin primer and the unsaturated polyester resin lining material are Insufficient curing occurs at the interface of the primer when the epoxy resin is sufficiently cured and then the unsaturated polyester resin lining material is applied repeatedly. However, there is a problem that the adhesion between the coated layers is not good, and the risk of delamination is large.

[0005]

SUMMARY OF THE INVENTION The present invention maintains a sufficient adhesive strength when applying an unsaturated polyester resin lining material, even when the base material has a high moisture content or is exposed to a high temperature after the application. It is intended for an unsaturated polyester resin lining method.

[0006]

Means for Solving the Problems In order to solve these problems, the present inventors have proposed a method in which a work surface of a construction base such as concrete and an unsaturated polyester resin lining material are provided.
The present inventors have found that it is effective to provide a room temperature curing type epoxy resin layer and a urethane resin layer, and have completed the present invention.

That is, according to the present invention, in a construction in which an unsaturated polyester resin is applied to a building or an inorganic surface of the building, a room temperature curing type epoxy resin is applied as a first layer, and further, a second layer is applied. The present invention provides an unsaturated polyester lining method characterized in that a urethane resin is repeatedly applied to form a two-layer resin coating layer between a base and an unsaturated polyester resin lining material.

As the inorganic surface constituent material of a building or a building to which the present invention is applied, pavement materials other than cast-in-place concrete (RC), precast concrete (PC), lightweight foamed concrete (ALC), mortar, etc. Granite, tiles, bricks, and the like, which are used as the materials.

The epoxy resin applicable to the first layer of the present invention means a combination of a thermosetting epoxy resin having at least two or more epoxy groups in one component and a curing agent for epoxy. . Examples of the epoxy resin include an ether type bisphenol type epoxy resin, a novolak type epoxy resin, a polyphenol type epoxy resin, an aliphatic type epoxy resin, an ester type aromatic epoxy resin, a cyclic aliphatic epoxy resin, and an ether / ester type epoxy resin. There is a resin, and an amine-based curing agent is generally used as a curing agent for an epoxy resin, and examples thereof include aliphatic amines, aromatic amines, polyamides, and heterocyclic amines.

[0010] These epoxy resins can be diluted with a solvent in order to strongly impregnate and adhere to the work surface.
Further, a silane coupling agent such as epoxy silane and amino silane may be added as an adhesion-imparting agent, depending on the kind of inorganic material to be used as a base material for construction.

The urethane resin applicable to the second layer in the present invention may be a polyisocyanate alone or a polyisocyanate and a known compound having two or more active hydrogens in one molecule. An isocyanate group-terminated prepolymer obtained by reacting below can be used.

The following are examples of the polyisocyanate which is a constituent component of the polyurethane resin of the present invention. 1), tolylene diisocyanate (including various mixtures of isomers), diphenylmethane diisocyanate (including various mixtures of isomers), 3,3′-dimethyl-4-
4'-biphenylene diisocyanate, 1,4-phenylene diisocyanate, xylene diisocyanate, tetramethyl xylene diisocyanate, naphthylene diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, hydrogenated xylene diisocyanate, 1. 4-cyclohexyl diisocyanate, 1
-Methyl-2,4 diisocyanate-cyclohexane,
2,4,4-trimethyl-1,6-diisocyanate-
Diisocyanates such as hexane; 2) triisocyanates such as 4,4 '/ 4 "-triphenylmethane triisocyanate and tris (4-phenylisocyanate) thiophosphate; 3) modified urethane-modified isocyanates and isocyanurates Polyfunctional isocyanates such as modified products, modified carbodiimide products, modified burette products, crude tolylene diisocyanate, and polymethylene / polyphenylene isocyanate.

The prepolymer having an isocyanate group as a terminal group used in the present invention includes the above-mentioned various organic polyisocyanate compounds, known polyols and known polyamines, and the like. These prepolymers are applied as they are and reacted with moisture in the air, and used as a moisture-curable one-part urethane primer. Alternatively, these prepolymer components and a known compound having two or more active hydrogens in one molecule can be used as a curing agent and used as a two-part curable urethane primer. further,
These prepolymers can be diluted with a solvent such as toluene, xylene, ethyl acetate, and a known thinner for urethane.

The unsaturated polyester resin of the present invention is used as a waterproof material, a floor material and a surface protective material which can be applied and applied, and examples thereof include MT flex.

In the lining method of the present invention, first, a cold-setting epoxy resin is applied as a first layer to an inorganic construction surface of a building or a structure represented by concrete or stone. The cold-setting epoxy resin is prepared by weighing a predetermined amount of an epoxy resin (base resin) and a curing agent, mixing them by stirring, and then uniformly applying them to the construction surface by using a trowel, a brush, or a spray. The coating amount varies depending on the condition of the base, but is usually 0.0
5 to 1.0 kg / m ² , more preferably 0.1 to 0.5
kg / m ² . 0.05 kg / m effect is not less economical in spite painted many with less and cause uneven coating primer coating effective than ² without 1.0 kg / m ² or more. As the second layer, a urethane-based resin is applied again and an unsaturated polyester resin lining material is applied.

[0016]

EXAMPLE A JIS concrete flat plate was used as a base material, and the base state was a dry base (Dry) and a wet base (Wet). Dry: JIS concrete flat plate (300 × 300 × 6
0 mm) after drying in an 80 ° C. drier for 24 hours.
What was cured in a 60% constant temperature and humidity room for 24 hours was defined as "Dry's JIS concrete plate". Wet: JIS concrete flat plate (300 × 300 × 6
0 mm) was immersed in a 50 cm deep water bath adjusted to 20 ° C., left for 5 days, taken out, and only the surface was wiped off to obtain “Wet JIS concrete plate”. Example 1 Dry JIS concrete slabs were adjusted to 20 ° C., and the surface was epoxy resin primer MT Flex FP-330 (hereinafter simply referred to as FP-330) manufactured by Mitsui Toatsu Chemicals, Inc.
0.2 kg / m ^{2 in} amount and dried by touch (coating time = 2 hours), and a urethane resin primer MT Flex FP-110 (hereinafter simply referred to as FP-110) manufactured by Mitsui Toatsu Chemicals, Inc. 0.1 kg / m ² ), and after drying to the touch, 1 kg / m of MT Flex D (hereinafter simply referred to as MT Flex D), an unsaturated polyester coating waterproofing material manufactured by Mitsui Toatsu Chemicals, Inc. were prepared m ² coating amount was tested body. The test specimen was cured for 7 days in a constant temperature / humidity room at 20 ° C.-60%, and then at 20 ° C. and 60 ° C. using a Kenken-type vertical tensile strength tester.
Table 1 shows the results of the evaluation (unit: kg / cm ² ). Example 2 In Example 1, a dry JIS concrete slab was prepared using 6 pieces.
Except that the temperature was adjusted to 0 ° C., the procedure was the same as in Example 1, and the results are shown in Table 1. Comparative Example 1 The procedure of Example 1 was repeated, except that only FP-330 was used as the primer, and the results are shown in Table 1. Comparative Example 2 The procedure of Example 2 was repeated, except that only FP-330 was used as the primer, and the results are shown in Table 1. Comparative Example 3 The procedure of Example 1 was repeated, except that only FP-110 was used as the primer, and the results are shown in Table 1. Comparative Example 4 The procedure of Example 2 was repeated, except that only FP-110 was used as the primer, and the results are shown in Table 1. Example 3 Wet JIS concrete slabs were adjusted to 20 ° C., and FP-330 was applied to the surface in an amount of 0.2 kg / m ² . 1kg /
m Flex ² amount, dry to the touch, MT Flex D 1 kg / m ²
Specimens coated in an amount were prepared. Place the water in the water tank and set it so that the upper third of the test piece comes out above the water surface.
After curing for one day, a Kenken-type vertical tensile strength evaluation test was performed in this state (Wet), and the results are shown in Table 1. Comparative Example 5 The procedure of Example 3 was repeated except that only FP-330 was used as the primer, and the results are shown in Table 1. Comparative Example 6 The procedure of Example 3 was repeated, except that only FP-110 was used as the primer, and the results are shown in Table 1.

[0017]

[Table 1]

[0018]

[Table 2]

[0019]

When the unsaturated polyester resin is applied to the inorganic surface of a building or a structure represented by concrete, a sufficient adhesive force can be obtained even when the surface temperature is high or the surface moisture content is high. In addition, it is possible to sufficiently compensate for the problem that the interface between the unsaturated polyester resin coating film and the epoxy primer, which occurs when the epoxy primer is used, is not cured and stable adhesive force cannot be obtained. .

Continuation of the front page (51) Int.Cl. ⁷ Identification code FI E01C 7/00 E01C 7/00 13/06 (72) Inventor Eiichi Yamazaki 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Mitsui Toatsu Chemicals Co., Ltd. Examiner Satoshi Aoyama (58) Field surveyed (Int. Cl. ⁷ , DB name) E04D 7/00

Claims (1)

(57) [Claims] In the construction of applying an unsaturated polyester resin to an inorganic surface of a building or a building, a room temperature curing type epoxy resin is applied as a first layer, and a second layer is applied.
An unsaturated polyester lining method, wherein a urethane resin is repeatedly applied as a layer, and two resin coating layers are formed between a base and an unsaturated polyester resin lining material.