JP2000160070A - Wiping auxiliary agent for wallpaper adhesive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an auxiliary agent for effectively wiping an adhesive sticking to the surface of a wallpaper by incorporating a flocculant exhibiting flocculation activity to a wallpaper adhesive. SOLUTION: As a flocculant is preferable an aqueous solution of sodium borate. For the aqueous solution of sodium borate instantaneously flocculates a starch-based adhesive composed mainly of starch and a starch-based adhesive containing a PVA protective colloidcontaining synthetic resin emulsion, which are standard wallpaper adhesives, to cause their gelation. The adhesive in a gel state does not spread around on the surface when wiped unlike one in a pasty state and is easily removed. Hence, as auxiliary agents for wiping a wallpaper adhesive composed mainly of starch can be employed further a crosslinking agent for starch such as epichlorohydrin, phosphorus oxychloride, phosphoric anhydride, trimetaphosphate salts, hexametaphosphate salts and boric acid. If required, a surfactant is further incorporated to improve penetrability of the agents.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiping aid for a wallpaper adhesive which is used, for example, for wiping an adhesive which has excessively adhered to the surface of wallpaper applied in wallpaper application.

[0002]

2. Description of the Related Art As an interior finish of a building, a sheet-like wall covering made of various materials such as paper, cloth, resin, metal, tile, etc., so-called wallpaper, is attached to a wall surface. The construction of this wallpaper is usually performed by cutting the rolled wallpaper into a predetermined size while continuously applying an adhesive to the back side using a on-site wallpaper gluing machine, and then manually attaching the wall to the wall. Is what you do.

[0003] As a work of attaching wallpaper to a wall surface, generally, a "butting" construction or an "over-cutting" construction method in which edges of adjacent wallpapers are abutted with each other is adopted. "Overlapping" means that when joining two pieces of wallpaper on a wall, the two pieces of wallpaper are pasted on the wall with the edges overlapped, and almost at the center of the overlapped portion before the glue dries Cut the edge of both wallpapers together through a knife, peel off the cut edge of the overlapping portion of the lower wallpaper, and paste the upper wallpaper on the wall where the stripped edge was (This also removes the separated edges of the wallpaper.) This is a construction method that continuously joins adjacent wallpapers.

[0004] In such wallpaper in which "overlapping" is performed, an inadvertent adhesive may adhere to the surface of the edge portion of the lower wallpaper. Also, laminating the curing tape along the edge of the back of the wallpaper to form the curing part,
Although this has the effect of preventing the adhesive from adhering to the wallpaper surface, the adhesive may sometimes protrude from the edge serving as a seam to the surrounding wallpaper surface when pressed during actual application. Such sticking out of the adhesive may also occur during "push" construction.

[0005] As an adhesive for wallpaper, a starch-based adhesive is generally used. To remove the adhesive adhered to the surface of the wallpaper attached to the wall surface as described above, However, they have simply been wiped with water or lukewarm water, or with an aqueous solution to which a surfactant or an amylolytic enzyme has been added. In some cases, wiping is performed after applying high-pressure steam.

[0006]

However, all of the conventional wiping methods as described above are based on the idea that the adhesive is softened to facilitate wiping. In practice, the wiping operation is performed again. In some cases, it has been difficult to completely remove the softened adhesive from the wallpaper surface, because the softened adhesive may enter the irregularities on the wallpaper surface or the adhesive may be simply spread while being diluted.

[0007] The adhesive remaining on the wallpaper surface is maintained in a dry state when the wallpaper is made of vinyl chloride, paper, fabric, olefin, or the like and has air permeability. Although the adhesion of contaminants causing discoloration is relatively small, in the case of a wallpaper in which a film having little air permeability is laminated, if a temperature difference occurs between the wallpaper surface and the base wall, a so-called dew condensation state remains. Since the adhesive is moistened, contaminants such as tobacco tar, dust and exhaust gas, which cause discoloration, tend to adhere, and the partial discoloration of the wallpaper surface becomes noticeable over time. Occurs.

Further, the above-described method of wiping the adhesive is used for the treatment after the occurrence of the discoloration. However, even if the wiping of the discolored portion is easy, the residual adhesive is removed by surface removal. As a result, the adhesive which has not been discolored often still remains, which again causes partial discoloration of the wallpaper surface.

In view of the above problems, an object of the present invention is to provide a method for wiping an adhesive adhered to a wallpaper surface which causes discoloration.
It is an object of the present invention to provide a wiping aid which acts on an adhesive so as to be easily removed without spreading around.

[0010]

In order to achieve the above object, a wiping aid for a wallpaper adhesive according to the first aspect of the present invention contains a flocculant having a flocculating effect on the wallpaper adhesive. Things.

The wiping aid for wallpaper adhesive according to the second aspect of the present invention is the wiping aid for wallpaper adhesive according to the first aspect, wherein the coagulant is an aqueous sodium borate solution. It is characterized by the following.

A wiping aid for a wallpaper adhesive according to a third aspect of the present invention is the wiping aid for a wallpaper adhesive according to the first aspect, wherein the wiping aid for a wallpaper adhesive mainly comprises starch. Wherein the coagulant comprises one or more of a starch crosslinking agent, epichlorohydrin, phosphorus oxychloride, phosphoric anhydride, trimetaphosphate, hexametaphosphate, boric acid, sodium borate.

Further, the wiping aid for wallpaper adhesive according to the invention of claim 4 is the wiping aid for wallpaper adhesive according to claim 3, further comprising a surfactant. It is.

Since the wiping aid of the present invention contains an aggregating agent having an aggregating effect on the wallpaper adhesive, if it is used for an adhesive that has adhered to the wallpaper surface, the wiping agent is easily aggregated and wiped off. Can be in a state. Therefore, the adhesive can be more efficiently wiped without spreading the adhesive to the surroundings.
Therefore, partial discoloration due to the attachment of a contaminant to the remaining adhesive can be prevented.

The cohesive action on the adhesive can be obtained by increasing the degree of crosslinking or polymerization of the adhesive.
As a result of various studies, the inventors of the present invention have found that, in particular, aqueous sodium borate solution is a starch-based adhesive mainly composed of starch, which is a general wallpaper adhesive, and PVA (polyvinyl alcohol).
The present inventors have found that a starch-based adhesive containing a protective colloid-based synthetic resin emulsion can be instantaneously aggregated, and have reached the present invention.

The cohesive action of sodium borate on the adhesive is gelation due to the crosslinking effect. The adhesive in the gel state can be easily removed without spreading around the surface due to wiping as in the case of a paste.

Even if a small amount remains on the wallpaper surface after wiping, since the degree of polymerization of the adhesive is increased, water resistance is improved, and contaminants are hardly adhered, so that discoloration is difficult. .

As such a flocculant, in addition to the above-mentioned sodium borate, any one having a flocculant action on an adhesive can be widely used. For example, epichlorohydrin, phosphorus oxychloride, phosphoric anhydride, trimetaphosphate, hexametaphosphate, boric acid, etc., exhibiting a crosslinking effect on starch.

If a flocculant containing one or more of these crosslinking agents also containing sodium borate is used as a wiping aid, the adhesive adhering to the wallpaper surface can be gelled and easily wiped off. it can. However, even if it has an aggregating effect on the adhesive, it must avoid any influence on the used wallpaper such as deterioration or discoloration. Accordingly, the coagulant may be appropriately selected according to the target wallpaper and adhesive, and the concentration of the coagulant may be appropriately set.

The coagulant constituting the wiping aid is desirably one that has little effect on the human body even when used daily by a builder, for the safety of workers. In this regard, sodium borate is a highly safe drug and is easy to use.

Further, when the starch paste adhering to the wallpaper surface is converted into a beta-crystal film (micelle) film over time to form a starch crystal particle (micellar) film, the wiping aid becomes difficult to penetrate, and the agglomeration action may be reduced. In this case, for example, it is preferable to add a surfactant such as sodium alkylbenzenesulfonate to the wiping aid to improve the permeability of the drug, and to make the flocculant efficiently act on the β-starch paste. .

The wiping aid according to the present invention is useful not only for wiping off the adhesive adhering to the wallpaper surface around the seam at the time of applying the wallpaper to the wall, but also for discoloring when the residual adhesive missed during the application causes discoloration later. It can also be used to remove parts. ADVANTAGE OF THE INVENTION According to the wiping aid of this invention, it is possible to wipe off the remaining adhesive easily and efficiently without gelling, instead of superficial wiping as in the related art.

When the wiping aid of the present invention is used,
The coagulation reaction (crosslinking reaction) of the coagulant can be promoted by increasing the temperature of the wiping aid, such as dilution with lukewarm water or warm water.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a wiping aid according to one embodiment of the present invention, various concentrations (0.5, 1.0, 3.0, 5.0, 10.0, 1) are used.
(5.0, 20.0, wt%) aqueous sodium borate aqueous solution, and each sodium borate aqueous solution was applied at different temperatures (5 ° C, 25 ° C, 50 ° C) to the starch-based adhesive applied to the surface of the film laminate wallpaper A flocculation and wiping experiment was performed on the sample. The results are shown in Table 1 below.

Here, the coagulation performance was evaluated on a four-point scale. That is, x indicates that the adhesive hardly gelled and spread to the surroundings by wiping in the same manner as before. X indicates that the adhesive partially gelled, but was insufficient and caused some spread and residual to the surroundings after wiping. △, The adhesive is sufficiently gelled, and hardly spreads to the surroundings due to wiping, but a slight adhesive residue is observed. ○: The adhesive is sufficiently gelled and almost completely taken off. The results obtained are shown as ◎.

[0026]

[Table 1]

As is evident from the results in Table 1, the coagulation performance of the aqueous sodium borate solution as a wiping aid to the starch-based adhesive is so effective that the water can be almost completely wiped off with cold water at a certain concentration or higher. It was a target. Of course, the higher the temperature is, the more effective it is. However, even at about 25 ° C., the same effect as 50 ° C. can be obtained. Aggregation and wiping of the agent can be performed. In the table, "-" indicates that sodium borate was not dissolved.

Experiments similar to those of the above embodiment were conducted on flocculants other than sodium borate, particularly on starch crosslinkers such as epichlorohydrin, phosphorus oxychloride, phosphoric anhydride, trimetaphosphate, hexametaphosphate, and boric acid. As a result, it was clarified that although the aggregation time and the performance were different, the starch-based adhesive was agglomerated in such a manner that it could be easily wiped off by setting appropriate concentrations and temperatures.

[0029]

As described above, according to the wiping aid for an adhesive for wallpaper of the present invention, the adhesive can be easily and efficiently wiped without spreading to the surroundings in a cohesive state, and the surface of the wallpaper can be partially removed. There is an effect that discoloration can be prevented.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasumasa Shin 4649 Shimo Aso, Takaoka City, Toyama Prefecture Inside Yayoi Chemical Industry Co., Ltd. (72) Inventor Hitomi Kato 4649 Shimo Aso, Takaoka City, Toyama Prefecture Yayoi Chemical Industry Co., Ltd. (72) Inventor Rikako Kojima 4649 Shimoasao, Takaoka City, Toyama Prefecture F-term in Yayoi Chemical Industry Co., Ltd. 4J038 BA111 HA476 PA07 PB05 PC10

Claims (4)

[Claims] 1. A wiping aid for a wallpaper adhesive, which comprises a flocculant having a flocculating effect on the wallpaper adhesive. 2. The wiping aid for a wallpaper adhesive according to claim 1, wherein the coagulant is an aqueous sodium borate solution. 3. An auxiliary agent for wiping a wallpaper adhesive containing starch as a main component, wherein the flocculant is a starch crosslinking agent such as epichlorohydrin, phosphorus oxychloride, phosphoric anhydride,
The wiping aid for a wallpaper adhesive according to claim 1, comprising one or more of trimetaphosphate, hexametaphosphate, boric acid, and sodium borate. 4. The wiping aid for a wallpaper adhesive according to claim 3, further comprising a surfactant.