JPH05163803A - Unsaturated polyester resin lining method - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a lining method for firmly adhering a base and an unsaturated polyester resin in a lining method for applying an unsaturated polyester resin to an inorganic surface of a building or a structure. [Structure] When lining an unsaturated polyester resin on the inorganic surface of a building or structure, by providing a two-layer primer of epoxy and urethane, sufficient adhesiveness is maintained even when the base surface is hot. Improves the function of saturated polyester resin lining materials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to waterproof construction for roofs, floors, walls, etc., waterproof construction for exposed heavy walks on rooftop parking lots, paved roads,
The present invention relates to a lining method for pavement finishing of sidewalks, balconies, etc. and surface protection of industrial plants, viaduct walls, marine structures, etc.

[0002]

2. Description of the Related Art Conventionally, when lining an inorganic surface such as a concrete or stone material such as a building or a structure, a primer is applied prior to the construction of the lining material,
There is known a technique for improving adhesiveness. For example, “Synthetic Polymer Floor Finishing Construction Guidelines” published by the Architectural Institute of Japan lists one-component polyurethane, epoxy resin, and unsaturated polyester resin as a primer.

When a primer of an unsaturated polyester resin is directly applied to an inorganic construction surface, it is difficult to set the primer layer and the lining layer at a coating timing, and if the water content of the construction surface (construction base surface) is high, the base is There is a problem of poor curing near the interface, and even if excellent adhesive strength is obtained at the beginning, if the construction surface is exposed to high temperatures such as in the hot summer, the adhesive strength will drop sharply, such as poor peel resistance. There's a problem. When urethane type resin is used as a primer, it is difficult to coat the primer and the lining material at a high timing, or the construction surface is exposed to high temperature (60
(° C), there is a problem that sufficient adhesive strength cannot be obtained due to the foaming phenomenon of the primer.

It is generally known that a room temperature curing type two-pack type epoxy resin has a high adhesive strength with respect to an inorganic base and has a high adhesive strength even when the surface of a construction base has a high water content. 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 applied over again at an early stage after the primer is dry to the touch, the epoxy resin primer and the unsaturated polyester resin lining material will be The interface of the resin is apt to cause curing failure, and it is not possible to obtain sufficient adhesive strength. Also, if the unsaturated polyester resin lining material is applied over after the epoxy resin has cured sufficiently, the curing interface phenomenon of the primer interface occurs. However, there is a problem that the adhesion between the recoating layers is not good and there is a high risk of delamination.

[0005]

DISCLOSURE OF THE INVENTION The present invention, when applied to an unsaturated polyester resin lining material, retains sufficient adhesive force even when the water content of the work base is high and when it is exposed to high temperatures after the work. 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 found that, between a construction surface of a construction base such as concrete and an unsaturated polyester resin lining material,
The present invention has been completed by finding that it is effective to provide an epoxy resin layer and a urethane resin layer which are curable at room temperature.

That is, according to the present invention, in a construction for applying an unsaturated polyester resin to an inorganic surface of a building or a structure, a room temperature curing type epoxy resin is applied as a first layer, and a second layer is further applied. As described above, the present invention provides an unsaturated polyester lining construction method characterized in that urethane resin is repeatedly applied and two resin coating layers are formed between the base and the unsaturated polyester resin lining material.

As the inorganic surface constituting material of the building or the structure to which the present invention is applied, in-situ cast concrete (RC), precast concrete (PC), lightweight expanded concrete (ALC), mortar, etc., as well as paving materials Examples include granite, tiles, bricks, etc.

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

These epoxy resins can be diluted with a solvent in order to firmly impregnate and adhere to the work surface.
Further, a silane coupling agent such as epoxysilane or aminosilane may be added as an adhesion-imparting agent depending on the type of the inorganic substance used as the construction base.

The urethane resin applicable to the second layer in the present invention is a polyisocyanate alone, or a polyisocyanate and a known compound having two or more active hydrogens in one molecule, in excess of isocyanate. Prepolymers terminated with isocyanate groups which are obtained by reacting below can be used.

As the polyisocyanate which is a constituent of the polyurethane resin of the present invention, the following can be exemplified. 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), 4,4 ′, 4 ″ -triphenylmethane triisocyanate, triisocyanates such as tris (4-phenylisocyanate) thiophosphate, 3), urethane-modified products of the above isocyanates, isocyanurate Chemically modified products, carbodiimidated products, burette modified products, crude tolylene diisocyanate, polymethylene / polyphenylene isocyanate and other polyfunctional isocyanates.

The prepolymer having an isocyanate group as an end group used in the present invention includes the above-mentioned various organic polyisocyanate compounds, known polyols, known polyamines and the like, and two or more active hydrogens in one molecule. With a known compound that has been reacted with a known method so that free isocyanate groups remain, these prepolymers are applied as they are and reacted with the humidity in the air to be used as a moisture-curing one-component urethane primer It is also possible to use these prepolymer components and a known compound having two or more active hydrogens in one molecule as a curing agent to be used as a two-component curing type urethane primer. further,
It is also possible to dilute these prepolymers with a solvent such as toluene, xylene, ethyl acetate or the like and a known urethane thinner or the like.

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 coated, and examples thereof include MT flex.

In the lining method of the present invention, first, a room temperature curing type epoxy resin is applied as a first layer to an inorganic construction surface of a building or structure represented by concrete or stone. As for the room temperature curable epoxy resin, a predetermined amount of an epoxy resin (main component) and a curing agent are weighed out, mixed with stirring, and then uniformly applied onto the construction surface by a trowel, brush or spray. The coating amount varies depending on the condition of the substrate, but is usually 0.0
5 to 1.0 kg / m ² , more preferably 0.1 to 0.5
It is in the range of 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, urethane-based resin is repeatedly applied, and then an unsaturated polyester resin lining material is applied.

[0016]

[Example] A JIS concrete flat plate was used as a base material, and its base state was a dry base (Dry) or a wet base (Wet). Dry: JIS concrete flat plate (300 x 300 x 6
0 mm) in a dryer at 80 ° C for 24 hours and then at 20 ° C-
What was aged for 24 hours in a 60% constant temperature and humidity chamber was designated as "Dry JIS concrete flat plate". Wet: JIS concrete flat plate (300 x 300 x 6
(0 mm) was immersed in a water tank with a depth of 50 cm adjusted to 20 ° C., left for 5 days, then taken out, and only the water on the surface was wiped off to obtain “Wet JIS concrete flat plate”. Example 1 A JIS concrete flat plate of Dry was adjusted to 20 ° C., and an epoxy resin primer MT flex FP-330 (hereinafter simply referred to as FP-330) manufactured by Mitsui Toatsu Chemicals, Inc. was used on the surface.
0.2 kg / m ² amount is applied, and after touch-drying (coating time = 2 hours), 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 being dried to the touch, 1 kg / ml of unsaturated polyester coating waterproof material MT Flex D (hereinafter simply referred to as MT Flex D) manufactured by Mitsui Toatsu Chemicals, Inc. A test body coated with m ² was prepared. The test body was aged in a constant temperature and humidity room of 20 ° C.-60% for 7 days, and then 20 ° C. and 60 ° C. in a Kenken vertical tensile strength tester.
The adhesive strength evaluation test was carried out under the conditions of (1) and the results (unit: kg / cm ² ) are shown in Table 1. Example 2 In Example 1, a dry JIS concrete flat plate was used.
Same as Example 1 except that the temperature was adjusted to 0 ° C, and the results are shown in Table 1. Comparative Example 1 The same procedure was performed as in Example 1 except that FP-330 was the only primer used in Example 1, and the results are shown in Table 1. Comparative Example 2 The same procedure was performed as in Example 1 except that FP-330 was used as the primer in Example 2, and the results are shown in Table 1. Comparative Example 3 The same procedure was performed as in Example 1 except that FP-110 was used as the primer in Example 1, and the results are shown in Table 1. Comparative Example 4 The same procedure was performed as in Example 1 except that FP-110 was used as the primer in Example 2, and the results are shown in Table 1. Example 3 A JIS concrete flat plate of Wet was adjusted to 20 ° C., 0.2 kg / m ^{2 of} FP-330 was applied on the surface, and after drying with touch (applying time = 2 hours), FP-110 was adjusted to 0. 1 kg /
After applying m ² amount and touch-drying, MT Flex D is 1 kg / m ²
A test body coated in a quantity was prepared. Place the water in the water tank and set it so that the upper 1/3 of the test piece appears above the water surface.
After curing for one day, a Kenken-type vertical tensile strength evaluation test in this state (Wet) was carried out, and the results are shown in Table 1. Comparative Example 5 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 same procedure as in Example 3 was carried out except that only the FP-110 was used as the primer in Example 3, and the results are shown in Table 1.

[0017]

[Table 1]

[0018]

[Table 2]

[0019]

[Effect of the Invention] When an unsaturated polyester resin is applied to an inorganic surface of a building or a structure typified by concrete, sufficient adhesive force can be obtained even when the surface temperature is high or the surface water content is high. In addition, it is possible to sufficiently compensate for problems such as the fact that the interface of the unsaturated polyester resin coating film with the epoxy primer becomes uncured and a stable adhesive force cannot be obtained when the epoxy-based primer is used. ..

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Kiyohide Oshima 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd. (72) Eiichi Yamazaki 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Inside Chemical Co., Ltd.

Claims (1)

[Claims] 1. A construction in which an unsaturated polyester resin is applied to an inorganic surface of a building or a structure, a room temperature curing type epoxy resin is applied as a first layer, and a second layer is further applied.
An unsaturated polyester lining construction method, characterized in that urethane resin is applied repeatedly as a layer, and two resin coating layers are formed between the base and the unsaturated polyester resin lining material.