JPS5855890B2 - How to make tile blocks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved method for manufacturing tile blocks in which tiles are attached to a sheet, mortar is poured, and then the sheet is peeled off from the tiles.

When using tiles in construction work, there are two methods: one is to paste the tiles on site, and the other is to manufacture tile blocks with tiles pasted on the mortar surface in advance and stack the blocks on site. We have already proposed an improved method for this.

Traditionally, tile blocks used in the latter method are made by applying double-sided adhesive tape or a vinyl adhesive such as vinyl acetate emulsion to the sheet, attaching the tiles, pouring mortar and letting it harden, and then separating the tiles from the sheet. It was manufactured by peeling it off.

The disadvantage of using double-sided adhesive tape is that the tiles may move when pouring the mortar, and the mortar that has entered the joints may stain the surface of the tiles.

In addition, methods using vinyl adhesives such as vinyl acetate emulsion require time for the adhesive to harden, making it difficult to peel the sheet from the tile. There are disadvantages such as the tiles may peel off from the mortar when peeling.

The present inventors completed the present invention as a result of research into a method for manufacturing a tile block in which tiles and sheets are firmly adhered to each other when mortar is poured into them, and the sheets can be easily peeled off from the tiles after the mortar hardens.

That is, the present invention uses polyisocyanate on one side of the sheet and an average molecular weight of 400 to 10. After forming a fixing agent layer made of a hydraulic incyanate compound obtained by reacting OOO with a polyol and pasting the tile, the hydraulic isocyanate compound is cured and mortar is poured on top of the tile. A method of manufacturing tile blocks that involves solidifying and then peeling the sheet from the tile.

According to the present invention, by using a hydraulic isocyanate compound as a fixing agent, when tiles are fixed to a sheet, the adhesive force of the hardened fixing agent is strong, so tiles do not move when pouring mortar. The joints are beautifully finished because there is a bulge of adhesive at the joints of the tiles.On the other hand, after the mortar has hardened, when peeling the sheet from the tile block, the alkaline components transferred from the mortar can cause damage to the joints. Since the hardened adhesive decomposes and the adhesive strength decreases, it can be easily peeled off and the tile will not come off.

The hydraulic isocyanate compound used as a fixing agent in the present invention has the property of rapidly reacting with water or atmospheric moisture at room temperature to harden, and is obtained by the reaction of polyisocyanate and polyol. It is a urethane prepolymer with an incyanate group at the end.

Polyisocyanates used as raw materials for hydraulic isocyanate compounds include aromatic polystyrene such as tolylene diisocyanate, tolylene diisocyanate distillation residue, diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate, xylylene diisocyanate, and 1,5-naphthylene diisocyanate. Examples include aliphatic polyisocyanate buttons such as isocyanate and hexamethylene diisocyanate, and alicyclic polyisocyanates such as hydrogenated tolylene diisocyanate and hydrogenated diphenylmethane diisocyanate.

Tolylene diisocyanate due to its economic efficiency and easy availability,
Diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate and hexamethylene diisocyanate are preferred.

Polyols used as raw materials for hydraulic isocyanate compounds include polyether polyol buttons such as polyalkylene glycols with an average molecular weight of 400 to 1oooo, alkylene oxide adducts of polyhydric alcohols, and polycarboxylic acids such as adipic acid and phthalic acid. Examples include polyester polyols with polyhydric alcohols such as ethylene glycol, propylene gellicol, diethylene glycol, 1,4-butanediol, 16-hexanediol, and trimethylolpropane.

Among these, polyether polyols are preferred.

A urethane prepolymer suitable as a hydraulic isocyanate compound is a combination of a polyol and a polyisocyanate.
It is produced by using a slight excess of isocyanate groups, preferably at a ratio of 1.1 to 4.0 isocyanate groups per one hydroxyl group.

When using a hydraulic isocyanate compound as a fixing agent, a solvent inert to isocyanate groups can be used to improve workability.

Examples of these solvents include ketones such as methyl ethyl ketone and methyl isobutyl ketone, esters such as ethyl acetate, butyl acetate, and 3-methoxybutyl acetate, aromatic hydrocarbons such as benzene, toluene, and xylene, and methyl cellosolve acetate. It will be done.

An inorganic or organic filler may be added to the shrunk hydraulic isocyanate compound.

Examples of fillers include bentonite, cerben (porcelain powder)
, Merck, white carbon, diatomaceous earth (microcell), calcium carbonate, titanium oxide, asbestos tulka floc (cellulose), etc.

These fillers are hydraulic isocyanate compounds 100
It can be added in an amount of 60 parts by weight per part by weight.

When a tile has an uneven surface, the use of a filler has the effect of preventing poured mortar from penetrating into the tile surface.

The sheet used in the present invention may be paperboard, plywood, precast concrete panel, metal plate, etc., but special paper coated with a waterproof resin coating is particularly suitable.

Since this special paper has flexibility, it has the advantage that it can be easily peeled off from the tile block and can be used repeatedly.

The mold used for pouring the mortar is a commonly used mold.

Next, the present invention will be specifically explained with reference to Examples.

[Example 1] 88.9 parts by weight of random polyalkylene glycol with an average molecular weight of 48,000 and 11.1 parts by weight of tolylene diisocyanate (24 pieces of 80φ) were mixed at 60°C with ethylene oxide propylene dioxide = 4:1 (weight ratio). The mixture was reacted for 1 hour and then at 90°C for 3 hours to obtain urethane prepolymer [A].

Similarly, urethane prepolymer [B].

[C:], CD), [E:], CFI), CG).

[H'3 director and (r) were synthesized.

Next, a 300
After coating on a 0 mm sheet and spraying water uniformly, 9 pieces of pavement magnetic tiles were immediately attached and compressed to harden the urethane prepolymer.

After examining the adhesion between the tiles and the sheet, mortar was poured from the front side of the tiles using a formwork.

After the mortar has hardened, peel the sheet from the tile,
Peeling between the tiles and the adhesive was investigated.

The results are shown in Table-1.

, urethane prepolymer CB) and [E)&'k
This is a comparative example.

[Example 2] Using a mixture of 90 parts by weight of urethane prepolymer CA) and 10 parts by weight of dibutyl phthalate as a sticking agent, Example 1
When a tile block was produced in the same manner as above, a beautiful tile block was obtained with no tiles peeling off.

[Example 3] Urethane prepolymer ['] 60.6 parts by weight and acetic acid 3-
19.7 parts by weight of methoxybutyl and Visol 5AS-2
When a tile block was manufactured using a homogeneous mixture of 919.7 parts by weight of 95 (manufactured by Nippon Petrochemical) as a fixing agent, a beautiful tile block was obtained.

[Example 4] 25 parts by weight of bentonite and 5 parts by weight of trisnonylphenyl phosphite were added to 70 parts by weight of a mixture of urethane prepolymer [G]/methyl ethyl ketone/diptylphthalate-70/15/15.The resulting fixing agent When a tile block was manufactured using this method, a beautiful tile block was obtained with no shifting or peeling of the tiles.

Claims (1)

[Claims] 1 Polyisocyanate and average molecular weight 40 on one side of the sheet
After forming a fixing agent layer made of a hydraulic isocyanate compound obtained by reaction with a polyol of 0 to 10,000 and pasting the tile, the hydraulic isocyanate compound is cured, and mortar is poured on top of the tile and solidified. 1. A method for producing a tile block, comprising: removing the sheet from the tile; and then peeling the sheet from the tile.