JP6182085B2 - Elevating adhesive - Google Patents

Description

  The present invention relates to an adhesive for an upright material used when an upright material such as a waist wall material or a wall surface material is bonded to an upright base surface.

Wall materials such as a waist wall material and a decorative resin sheet are constructed on the wall surface of the building. Such a waist wall material (hereinafter, such a building material is referred to as an upright material) is bonded to an upright base surface that is raised in a direction substantially perpendicular to the horizontal surface using an adhesive. There are many.
Specifically, the surface material is an adhesive adhesion step in which a required amount of adhesive is applied to the standing base surface, and the adhesive is extended along the base surface using an applicator such as a comb-shaped iron. It is applied to the standing base surface through an extending process for expanding and a laying process for pressing and adhering the surface material to the surface.
Conventionally, since an appropriate adhesive for adhering an upright material is not known, an adhesive for flooring has been diverted as an adhesive for the upright material.
For example, Patent Document 1 discloses an adhesive for flooring having a viscosity of 9,000 to 11,000 mPa · s and a thixotropic coefficient (TI value) of 3.6 to 3.9. As described above, in general, the adhesive for flooring can be easily expanded by setting the viscosity to a relatively low viscosity of 11,000 mPa · s or less, while expanding by increasing the thixotropic coefficient (TI value). It is possible to maintain the uneven shape of the adhesive that occurs when
However, the standing base surface, which is the construction surface of the upright material, rises substantially perpendicular to the horizontal plane. When a required amount of adhesive is applied to the standing base surface, a part of the adhesive lump may hang down on the floor surface. Furthermore, when expanding the adhesive, there is also a problem that it is difficult for the required amount of adhesive to spread over a wider range.

JP 7-268309 A

  An object of the present invention is to provide an adhesive for an elevating material which is difficult to sag and can be spread well along a standing base surface.

  As described above, the present inventors have a contradiction at first glance that it is difficult to sag when applying an adhesive to a standing base surface of a building, and that the adhesive can be spread well along the standing base surface. As a result of diligent research under the new viewpoint of achieving both effects, it has been found that the above effects can be achieved by setting the viscosity and thixotropy to a range that cannot be assumed by conventional floor adhesives.

The adhesive for an upright material of the present invention is an adhesive used when adhering an upright material to a standing base surface of a building, and includes an acrylic resin emulsion and a Newtonian urethane association as a thickener. A TI value determined according to the following formula when the viscosity measured using a BH viscometer and measured at 23 ° C. and a rotation speed of 10 rpm is 40,000 to 60,000 mPa · s. 1.0 and less than 3.5.
Formula: TI = η1 / η2
However, η1 is a viscosity (mPa · s) measured using a BH viscometer at 23 ° C. and a rotation speed of 2 rpm, and η2 is a BH viscometer using 23 ° C. and a rotation speed. Viscosity (mPa · s) measured at 20 rpm.

  The adhesive for an upright material of the present invention hardly hangs down when it is attached to the upright base surface and when the upright material is affixed, and can be spread well along the upright base surface with a relatively small force.

The reference schematic which shows the standing base surface where the adhesive agent for standing surfaces of this invention is apply | coated. Reference sectional drawing which shows the state which extends and expands the adhesive for standing materials to a standing base surface. A top view of a comb-shaped iron.

The adhesive for standing materials of the present invention has a viscosity at 23 ° C. of 40,000 to 60,000 mPa · s and a TI value of more than 1.0 and less than 3.5.
The adhesive for an elevation material includes a polymer material and a thickener, and includes a tackifier, a filler, and other additives as necessary.
In the present specification, the description “A to B” means A or more and B or less.

[Polymer material]
Although it does not specifically limit as a polymeric material, Since it is excellent in adhesive strength and it is easy to adjust to the range of the said viscosity and TI value, a polymeric emulsion is preferable and a resin emulsion or rubber latex is more preferable.
Examples of the resin emulsion include (meth) methyl acrylate resin, (meth) ethyl acrylate resin, (meth) methyl acrylate resin, (meth) ethyl acrylate resin, (meth) butyl acrylate resin, (meth) ) Acrylic resins such as 2-ethylhexyl acrylate resin, acrylonitrile resin, methacrylonitrile resin; vinyl resins such as vinyl acetate, ethylene vinyl acetate, vinyl propionate, vinyl versatate; polyester resin; fluororesin; epoxy resin; Resins; polyether resins; those in which a synthetic resin such as a silicone resin is dispersed in water, or those in which two or more synthetic resins are copolymerized are dispersed in water. Examples of the rubber latex include SBR (styrene butadiene rubber) latex, NBR (nitrile rubber) latex, MBR (acrylic rubber) latex, BR (polybutadiene rubber) latex, IIR (butyl rubber) latex, CR latex, IR latex, many Examples thereof include sulfurized rubber latex. You may use these individually by 1 type or in mixture of 2 or more types. Among these, an acrylic resin emulsion is particularly preferable.

[Thickener]
As the thickener, any adhesive can be used without particular limitation as long as the adhesive can be in the range of the viscosity and the TI value.
Preferably, an associative resin is preferably used as the thickener, and more preferably a Newtonian one is used. The association type resin has a hydrophobic group and a hydrophilic group in the resin, the hydrophobic group associates with the hydrophobic group in the dispersion medium, and the hydrophilic group associates with each other and spreads throughout the dispersion medium. Form a weak network structure and thicken the dispersion medium. A Newtonian thickener is a thickener that dissolves in a dispersion medium and gives the dispersion medium a viscosity that exhibits a strain rate proportional to the stress during flow.
As the association resin, for example, a urethane association type can be used, and a Newtonian urethane association type is preferable.
The blending amount of the thickener is preferably 10 to 80 parts by mass, preferably 20 to 60 parts by mass with respect to 100 parts by mass of the solid content of the polymer emulsion in order to constitute an adhesive having a range of the viscosity and the TI value. Is more preferable.

[Tackifier]
Examples of tackifiers include rosin resins, petroleum resins, and terpene resins.
Examples of rosin resins include natural rosin such as tall rosin, gum rosin, and wood rosin; hydrogenated rosin obtained by hydrogenation of natural rosin; heterogeneous rosin; rosin esterified product obtained by esterifying natural rosin with polyhydric alcohol; rosin phenol modified product; Examples thereof include a rosin unsaturated acid modified product obtained by modifying natural rosin with an unsaturated acid.

Examples of the petroleum resins include C5 petroleum resins, C9 petroleum resins, C5-C9 copolymer petroleum resins, dicyclopentadiene petroleum resins, and hydrides thereof.
Examples of terpene resins include α-pinene resins, β-pinene resins, aromatic-modified terpene resins, and hydrides thereof.
These tackifiers can be used alone or in combination of two or more.
Among the tackifiers, rosin resins are preferably used, and rosin esterified products are more preferably used.

  Although the compounding quantity of a tackifier is not specifically limited, 5-90 mass parts is preferable with respect to 100 mass parts of solid content of a polymer emulsion, and 10-70 mass parts is more preferable.

[filler]
Examples of the filler include an inorganic filler and an organic filler, and an inorganic filler is preferable. Examples of the inorganic filler include calcium carbonate, titanium oxide, silicon oxide, talc, and clay. A filler can be used individually by 1 type or in combination of 2 or more types. 100 mass parts-500 mass parts are preferable with respect to 100 mass parts of solid content of a polymer emulsion, and, as for the compounding quantity of a filler, 200 mass parts-400 mass parts are more preferable.

[Other additives]
In addition to these components, other components may be blended in the adhesive for an elevation material of the present invention.
Examples of the other components include a film-forming aid, a dispersant, a thickener, an antiseptic, an antifungal agent, a rust inhibitor, an antifreezing agent, a surfactant, an antifoaming agent, a plasticizer, and a pigment.

[Adhesive for elevation materials]
The adhesive for standing surfaces of the present invention has a viscosity at 23 ° C. of 40,000 to 60,000 mPa · s and a TI value of more than 1.0 and less than 3.5. The viscosity is preferably 42,000 mPa · s or more, and more preferably 43,000 mPa · s or more. Furthermore, the viscosity is preferably 59,000 mPa · s or less, more preferably 56,000 mPa · s or less. Further, the TI value is preferably 1.1 or more, and more preferably 1.3 or more. Further, the TI value is preferably 3.2 or less, more preferably 3.0 or less, and particularly preferably 2.5 or less. The TI value is a thixo index and is a ratio of apparent viscosities at two different shear rates (rotational speeds).
Here, the viscosity (mPa · s) is measured at 23 ° C. using a BH viscometer under the condition of a rotation speed of 10 rpm. The TI is obtained by the formula: TI = η1 / η2. The η1 is a viscosity (mPa · s) measured at 23 ° C. using a BH viscometer under the condition of a rotational speed of 2 rpm, and the η2 is 23 ° C. using a BH viscometer. The viscosity (mPa · s) measured at a rotation speed of 20 rpm.
The adhesive for an elevation material of the present invention can be obtained by blending a predetermined amount of a thickener, a tackifier, a filler and other additives into the polymer material. In particular, by appropriately adjusting the type and amount of the thickener, the viscosity at 23 ° C. is 40,000 to 60,000 mPa · s and the TI value is more than 1.0 and not more than 3.0. An adhesive can be obtained.

[Usage of adhesive for elevation materials]
The adhesive for an elevation material of the present invention is mainly used when the elevation material is affixed to a standing base surface.
As shown in FIG. 1, the standing foundation surface 1 is a wall foundation surface that rises in a direction substantially orthogonal to the floor surface 2 (horizontal plane) of the building, for example.
The elevation material is not particularly limited, and examples thereof include a waist wall material and a decorative resin sheet. The resin sheet is a flexible resin sheet that can be wound into a roll. Examples of commercially available products of the waist wall material include wood deco (trade name) and deco panel (trade name) manufactured by Toli Corporation. As a commercial item of the said decorative resin sheet, the Tori antifouling deodorant waist wall sheet (brand name) etc. by Toli Co., Ltd. are mentioned.
As shown in FIG. 1, a desired amount of the adhesive 3 for the surface material is applied to the standing base surface 1 using an applicator such as a comb-shaped iron 5. As shown in FIG. 2, the lump of the adhesive 3 rising from the standing base surface 1 is stretched along the standing base surface 1 by using an applicator such as a comb-shaped iron 5, as shown in FIG. To expand the adhesive 3 (in the direction of the arrow in FIG. 2). After the adhesive 3 is spread on the upright base surface 1, the upright material can be attached to the upright base surface 1 through the adhesive 3 by pressing the upright material.
As shown in FIG. 3, the comb iron 5 has a flat spatula body 51 and a grip portion 52 provided on the proximal end side of the spatula body 51. The spatula body 51 is formed in a substantially trapezoidal shape in plan view, and the tip side thereof is formed in an uneven shape. For example, as shown in the drawing, a plurality of cutout portions 53 (eight locations in the illustrated example) are recessed at predetermined intervals on the distal end side of the spatula body 51. The notch 53 has, for example, a pointed tip that is the top of the inner recess. Moreover, the said holding part 52 consists of a thick resin molded product, for example, and is attached to the base end side of the spatula main body 51. FIG. Of course, the applicator for the adhesive for an elevation member is not limited to the above-mentioned comb-shaped iron, but can also be a comb-shaped iron having another shape, a spatula having a notch portion and having a straight tip.

  The adhesive for standing materials of the present invention has a viscosity of 40,000 to 60,000 mPa · s and a TI value exceeding 1.0 and less than 3.5. It can spread well along, and it is difficult to sag when attaching it to a standing base surface of a building and when attaching a surface material. Furthermore, the adhesive for standing surfaces of the present invention can be widely spread on the standing base surface with a relatively small force.

  Examples of the present invention and comparative examples will be described. In addition, this invention is not limited only to the following Example.

[Materials used]
(1) Polymer Material An acrylic resin emulsion (trade name “Pegard” manufactured by High Pressure Gas Industry Co., Ltd.) was used as the polymer material.
This acrylic resin emulsion consists of 50 parts by mass of solids and 50 parts by mass of water.
This acrylic resin emulsion had a viscosity at 23 ° C. of 2400 mPa · s and a pH of 7.0.

(2) Filler Calcium carbonate (trade name “LW350” manufactured by Shimizu Kogyo Co., Ltd.) was used as the filler. The average particle diameter of this calcium carbonate was 6.0 μm, the true specific gravity was 2.72, and the specific surface area was 10,480 cm ² / g.
(3) Tackifier A rosin ester (Arakawa Chemical Industries, trade name “Superester A75”) was used as a tackifier. This had a softening point of 70 to 80 ° C. and an acid value of 10 or less.
(4) Solvent Alkylbenzene and glycol ethers were used as the solvent.
(5) Thickener (A) Urethane-associative thickener A
Newtonian urethane associative thickener. Product name "Adecanol UH-420" manufactured by ADEKA Corporation.
(B) Urethane associative thickener B
Newtonian urethane associative thickener. Product name "Adecanol UH-450VF" manufactured by ADEKA Corporation.
(C) Urethane associative thickener C
Newtonian urethane associative thickener. Product name “SN thickener 602” manufactured by San Nopco.
(D) Urethane associative thickener D
Newtonian urethane associative thickener. Product name “SN thickener 603” manufactured by San Nopco.
(E) Urethane associative thickener E
Thixic urethane associative thickener. Product name “Adecanol UH-756VF” manufactured by ADEKA Corporation.
(F) Urethane associative thickener F
Thixic urethane associative thickener. Product name "Adecanol UH-752" manufactured by ADEKA Corporation.
(G) Urethane associative thickener G
Newtonian urethane associative thickener. Product name “SN thickener 612”, manufactured by San Nopco.
(H) Urethane associative thickener H
Newtonian urethane associative thickener. Product name “SN thickener 601” manufactured by San Nopco.
(I) Acrylic acid thickener High-pressure gas industry Co., Ltd. product name "Y1000".
(J) Cellulose-based thickener manufactured by Sansho Co., Ltd., trade name “SANHEC”.
(6) Other additives Antifreeze and emulsifier.

[Examples 1 to 5 and Comparative Examples 1 to 8]
In the blending ratios shown in Tables 1 to 3, the materials of (1) to (6) are mixed with a predetermined amount of water, and the adhesives for elevation materials of Examples 1 to 5 and Comparative Examples 1 to 8 are respectively used. Prepared.
In Tables 1 to 3, each material in the compositions of Examples and Comparative Examples is expressed in parts by mass.

[Comparative Examples 9 to 13]
In Comparative Example 9, a commercially available adhesive for flooring (trade name “cement KG” manufactured by Tajima Co., Ltd.) was used as it was.
In Comparative Example 10, a commercially available adhesive for flooring (manufactured by Sangetsu Co., Ltd., trade name “Benridine AR”) was used as it was.
In Comparative Example 11, a commercially available adhesive for flooring (manufactured by Sangetsu Co., Ltd., trade name “Benridine PC-1”) was used as it was.
In Comparative Example 12, a commercially available adhesive for flooring (manufactured by Ron Seal Industry Co., Ltd., trade name “Lon Cement Eco Super”) was used as it was.
In Comparative Example 13, a commercially available adhesive for skirting boards (manufactured by Ron Seal Industry Co., Ltd., trade name “for roncement baseboard”) was used as it was.

[Measurement method of viscosity]
The viscosities of the adhesives of Examples and Comparative Examples were measured according to JIS K 6833-1 according to BH viscometer and rotor No. 6 was measured under the conditions of 23 ° C. and 10 rpm.

[Measurement method of TI value]
The TI values of the adhesives of the examples and comparative examples were measured according to JIS K 5400, and the values were substituted into the following formula and rounded to 2 significant figures.
Formula: TI = η1 / η2
The η1 is a BH type viscometer and rotor No. according to JIS K 6833-1. 6 is a viscosity (mPa · s) at 2 rpm measured at 23 ° C., and η2 is a viscosity (mPa · s) at 20 rpm.
Table 4 shows the viscosity and TI value of the adhesives of Examples and Comparative Examples.

[Evaluation of drooping]
The adhesive of Example 1 was added to a flexible plate (a flexible plate having a thickness of 5 mm and 900 mm × 900 mm as defined in JIS A 5430) that was raised substantially perpendicular to the horizontal plane, at 23 ° C. ± 2 ° C., and humidity 50 ±. About 10 g of a lump was attached under 10%. When the adhesive lump is adhered to the substantially vertical flexible plate (hereinafter, referred to as a vertical surface) and after the adhesion lump is spread using an applicator, the adhesive droops. Sex was evaluated. The sagging property was similarly evaluated for the adhesives of other examples and comparative examples. The results are shown in Table 4.

(Evaluation criteria for drooping)
○: The adhesive did not sag.
Δ: No drop of the adhesive was observed when it was attached to the vertical surface, but there was dripping or dropping of the adhesive as it spread out.
X: A part of the adhesive dropped when adhered to the vertical surface.

[Evaluation of elongation and load]
Immediately after the evaluation of the sagging property, a lump of adhesive was expanded along a vertical plane using a comb-shaped iron. The comb-shaped iron used was as shown in FIG. The comb-shaped iron has a notch depth a of 2.0 ± 0.2 mm, a notch base width b of 2.0 ± 0.2 mm, and a notch formation interval c of 5.0 ± 0.2 mm. It is 0.5 mm, and eight notches are recessed at equal intervals.
The stretchability was evaluated based on the degree of spread of the adhesive, and the load when the adhesive was extended was evaluated based on the feeling applied to the hand when the adhesive was extended. The results are shown in Table 4.

(Evaluation criteria for elongation)
○: The adhesive lump expanded to a range of 45 cm to 90 cm.
(Triangle | delta): The lump of the adhesive agent spread in the range of 20 cm or more and less than 45 cm.
X: The adhesive lump expanded to a range of 5 cm or more and less than 20 cm.

(Evaluation criteria for extensibility)
○: The adhesive could be extended with a relatively small force without any particular discomfort.
(Triangle | delta): When extending the adhesive agent, it felt a little heavy.
X: It was heavy and it was difficult to extend the adhesive.

From the results of the examples and comparative examples, the adhesive having a viscosity of 40,000 to 60,000 mPa · s as in the examples was difficult to drip and was not subjected to a large load during application.
Further, as in the examples, the adhesive having a TI value of 1.2 or more and 3.0 or less was satisfactorily stretched with a relatively small force and the coating property was good. From this, it is considered that the adhesive having a TI value of more than 1 and less than 3.5 has a good coating property.
On the other hand, among the comparative examples, the adhesive having a TI value of 3.8 or more had poor extensibility. In general, it is believed that the higher the TI value, the lower the viscosity under high shear force and the better the applicability of the adhesive, but the results of the comparative examples were surprising. The reason why the adhesive having a TI value of less than 3.5 as in the examples is superior in elongation compared to the adhesive having a TI value of 3.8 or more is not clearly understood. Guess as follows. When extending the adhesive lump attached to the standing base surface, the comb body is moved along the standing base surface so that the spatula body of the comb eye makes an acute angle substantially perpendicular or nearly perpendicular to the standing base surface. To stretch. Since this upright foundation surface rises substantially perpendicular to the horizontal plane, as shown in FIG. 2 , on one surface of the spatula body (in FIG. 2 , of the two planes of the spatula body, the upward surface) A lot of adhesive comes up. When the comb iron is moved, a large shearing force is applied to the adhesive between the tip side of the comb iron and the standing base surface, but a small shearing force is applied to the adhesive that is placed on one side of the spatula body. Or little shear force is applied. Since the adhesive of the comparative example has a relatively high TI value, the adhesive lump that has been placed on the spatula body does not flow so much, and the amount that remains in the comb iron after the adhesive stretching process is performed. It is estimated that there are many. On the other hand, since the adhesive of Example has a relatively low TI value, even if the viscosity is relatively high, the adhesive lump on the spatula body easily flows, and the amount remaining on the spatula body is relatively small. As a result, it is estimated that the extensibility was good.

DESCRIPTION OF SYMBOLS 1 Standing base surface 2 Floor surface 3 Adhesive for elevation materials 5 Comb-shaped iron

Claims (1)

It is an adhesive used when attaching a flooring material to a standing base surface of a building,
An acrylic resin emulsion and a Newtonian urethane associative resin as a thickener,
2. A viscosity measured using a BH viscometer at 23 ° C. and a rotation speed of 10 rpm is 40,000 to 60,000 mPa · s, and a TI value determined according to the following formula exceeds 1.0. The adhesive for elevation materials which is less than 5.
Formula: TI = η1 / η2
The η1 is a viscosity measured using a BH viscometer under the conditions of 23 ° C. and a rotation speed of 2 rpm, and the η2 is a viscosity measured at the rotation speed of 20 rpm.

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