JPS59152938A - Resin composition for temporary fixing of tile unit - Google Patents

Abstract

PURPOSE:To obtain a resin composition for the temporary fixing of tile unit, having excellent heat-meltability, adhesivity, strength and flame retardancy, and composed of a specific thermoplastic resin and a specific chloride. CONSTITUTION:The objective composition is prepared by compounding (A) preferably 40-99wt% of one or more polymers selected from ethylene-vinyl acetate copolymer, ethylene-acrylic acid ionomer, ethylene-ethyl acrylate copolymer, polyethylene and polymers having same effect as above (preferably an ethylene- vinyl acetate copolymer) and (B) 60-1wt% of a chlorinated paraffin (preferably having a chlorine content of about 70%) and/or a chlorinated fatty acid ester (preferably having a chlorine content of 50-90%).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved resin composition for temporary fixing of tile units, and more particularly for use in precast concrete plates or in constructing concrete structures at construction sites. The present invention relates to a resin composition used for temporarily fixing tile units.

Traditionally, tile unit structures have been made of paper, plywood,
It is known that the tile surface is attached to a sheet-like material such as a synthetic resin board or rubber with an adhesive, and then a synthetic resin material is used as a board joint in the joint area [fixed]. The manufacturing process involves applying adhesive to the sheet material and pasting the tiles, and forming board joints, which requires a lot of labor, and the board joints do not have adhesive strength. There were drawbacks in both the manufacturing process and performance, such as the possibility of peeling of the tiles from the concrete and the need to remove the adhesive that had contaminated the tile surface when removing the sheet after assimilating the concrete.

On the other hand, ethylene-based thermoplastic resins, typically ethylene-vinyl acetate copolymers, which soften and flow during heating during tile unit manufacturing and provide temporary adhesive strength, are used in pellet, powder, sheet, and laminated forms. Tile units are known that are integrally formed by temporarily adhering sheets, melts, or joints to a group of tiles, and the manufacturing process is easy, and the adhesive strength can be maintained even at the joints. In addition, since the tile surface is not contaminated when the sheet is removed during concrete assimilation, it can be said that various defects in the previous tile units have been greatly improved.

However, this type of ethylene-based thermoplastic resin itself has the following characteristics: it quickly softens and flows at relatively low temperatures, has excellent adhesive strength, and has excellent peelability and strength when removing the sheet. There are some deficiencies.

However, as a result of intensive research by the present inventors, ethylene-
At least one of vinyl acetate copolymers, ethylene-acrylic acid ionomers, ethylene-ethyl acrylate copolymers, polyethylene, or their equivalent substances) and excellent chlorine, making it extremely useful for temporarily fixing tile units. The present invention was completed based on the discovery that the present invention is useful.

That is, the present invention utilizes the above-mentioned specific thermoplastic resin (5
The present invention provides a resin composition for temporary fixing of tile units, which comprises as essential components a chlorinated compound (1) and a specific chloride compound (2).

Here, the thermoplastic resin (3) is an ethylene-vinyl acetate copolymer mainly composed of ethylene and vinyl acetate; an ionomer mainly composed of ethylene and acrylic acid;
Ethylene-based mainly on ethylene and ethyl acrylate
Examples include ethyl acrylate copolymers; polyethylenes containing ethylene as a main component, but also those copolymerized with other vinyl monomers.

Among these, particularly preferred are ethylene-vinyl acetate copolymers, especially vinyl acetate content (VA amount)
is 3 to 40% by weight, and the melt index (MI
Ethylene-vinyl acetate copolymers having a value of 3 to 100 are preferable from the viewpoint of heat meltability, strength, and adhesion.If the VA amount is less than 3'M, the adhesiveness is poor; heavy f
%, the strength will be poor; if the MI is less than 6, the heat meltability will be poor; and if it exceeds 100, the strength will be poor.

On the other hand, it is appropriate for the chlorinated paraffin to contain chlorine in the range of 20 to 90%, and in particular, chlorinated paraffin with a chlorine content of about 70% is solid and powdery. Easy to handle.

In addition, chlorinated fatty acid esters include relatively long-chain fatty acids that are solid at room temperature, such as stearic acid and relatively lower alcohols, such as ethyl alcohol i, ='r-
Chlorinated fatty acid esters, which are esters with phthyl alcohol, are preferred, and among them, chlorinated ethyl stearate or n-butyl stearate are particularly representative. It is suitable to have a chlorine content of 60 to 90%, and in particular, chlorinated fatty acid esters with a chlorine content of 50% or more are solid and therefore easy to handle.

The preferable ratio of the thermoplastic resin (5) to the chlorinated paraffin and/or chlorinated fatty acid ester (B) is that the former resin carrier component is 40 to 99% by weight, and the inherited chemical component (B) is 60% by weight. ~1 m-1, and those having such a composition ratio are preferred from the viewpoint of heat meltability, strength, and adhesive properties.

If the amount of the chlorinated compound (B) component is less than 1N, it is difficult to achieve the effect of the present invention, and if it exceeds 60, the strength will decrease, which is not preferable.

Thus, the composition of the present invention contains chlorinated paraffin and/or
Alternatively, the specific thermoplastic resin (5) contains the chlorinated fatty acid ester (B) in an amount of 1 to 60% by weight, but by using the composition of the present invention, the heat meltability can be improved. Of course, the strength is increased, the adhesive strength is improved, and the stain resistance of the tile surface is also improved, but since the composition of the present invention is also imparted with flame retardant properties, it is also preferable for disaster prevention. It has become.

The composition of the present invention may also contain a tackifier, if necessary, to further improve adhesive strength and heat melting properties, or terpene-based, rosin-based, petroleum-based tackifiers, etc. It is also possible to add various types of resins, such as resins based on tile or pinene, to the extent that they do not reduce the strength or stain resistance of the tile surface.

In addition, the composition of the present invention may contain blowing agents, flame retardants, stabilizers, antioxidants, etc., as long as they do not adversely affect moldability, heat meltability, strength, adhesion, and stain resistance of the tile surface.
Of course, it is also possible to add an epoxy compound or a filler.

In order to temporarily fix a tile unit or produce a tile unit using the composition of the present invention thus obtained,
Temporary adhesion of tiles can be achieved by heating and melting the resin composition of the present invention in the form of powder, pellets, sheets, or joint shapes, but it can also be used to temporarily bond tiles. There are also molding methods that combine shaped materials or laminated sheets.
The method for temporarily fixing or manufacturing such a tile unit is not limited in any way, and the composition of the present invention can be applied to any known and commonly used method.

Next, the present invention will be specifically explained with reference to Examples and Comparative Examples, in which "percentage" means "% by weight" unless otherwise specified.

Examples 1 to 4 and Comparative Examples 1 to 4 Inside the mold, the length is 108 mm, the width is 60 g, and the thickness is 8.5 W*.
Eight Aurora Tiles NB-15J (porcelain tiles manufactured by Tantan) were placed at a tile interval of 8Tm.

Therefore, first, a powdered resin composition for temporary fixing of tile units is prepared at the blending ratio shown in Table 1.

Next, the thus obtained powdered resin composition is spread over the group of tiles placed as described above.

9- Thereafter, the tile unit is temporarily fixed by heating it at 80° C. for 60 minutes, but before doing so, the heat melting time of each resin composition is measured to test the heat meltability.

In addition, the tile unit is peeled off from the tile surface after cooling, and at this time, the adhesive strength is measured by a 90 degree peel test, and this is taken as the adhesive strength of each resin composition. The strength was determined by measuring the tensile strength, and this tensile strength was 100 kg/C.
Anything less than WL2 is not practical, so it is considered "bad", and anything over 100 kf110R' is "good".
And so.

Furthermore, we visually observed the tile surface after the tile unit was removed to test the stain resistance of the tile surface, and also tested the AST
The flame retardance of each resin composition was determined in accordance with MD665. The flammability at 200°C was also tested.

These results are summarized in the same table.

10- Examples 5 to 8 and Comparative Examples 5 to 8 Each resin was prepared in the same manner as Examples 1 to 4 and Comparative Examples 1 to 4, except that the mixing ratio was changed as shown in Table 2. The composition was prepared, then temporarily fixed, and various performance tests were conducted.

The results are summarized in the same table.

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Claims (1)

[Scope of Claims] At least one of an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid ionomer, an ethylene-ethyl acrylate copolymer, polyethylene, or an equivalent substance thereof; (B ) containing chlorinated paraffin and/or chlorinated fatty acid ester as an essential component, heat-melting, adhesive,
A resin composition for temporarily fixing tile units that has excellent strength and flame retardancy.