JP2584559B2 - One-component aqueous quick-drying adhesive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a paperboard and a woodwork for various paper containers, bag making, packaging, paper tubes, etc., ceiling boards (rock wool decorative boards, insulation boards, particle boards,
Gypsum board, calcical board, acrylic board, glass wool), automotive interior materials, tiles, etc. For adhesives.

[0002]

2. Description of the Related Art In recent years, in various paints and adhesives,
Under the circumstances of the revision of the Fire Service Law and the strengthening of various pollution regulations, systems containing a large amount of organic solvents have been further shunned, and the demand for water-based systems has been increasing more than before. Aqueous emulsion paints and adhesives are water-based, non-polluting, safe not only without the danger of fire, etc., but also excellent in workability with various coating equipment such as sprays and rolls.
There is an advantage in that switching from a solvent system is possible.

[0003] Aqueous emulsion adhesives are safe and non-polluting without danger of fire, and have been actively studied in various industries, particularly in connection with recent revisions to the Fire Service Law. However, since the aqueous emulsion-based adhesive is originally water-based, it has a low evaporation and permeation rate, and is slow in drying, so that the initial adhesive strength is extremely slow, and there is a problem that the adhesive is not adhered unless the pressing time is long. For this reason, the productivity of various processed products using these aqueous emulsion-based adhesives is poor and not only irrational, but also extremely inferior in bonding workability. Therefore, for example, it is extremely unsuitable as an adhesive for ceilings of buildings and houses, an adhesive for interior materials of automobiles, an adhesive for tiles and the like, which are required to exhibit an adhesive force in a short time.

In order to solve these problems, a method of adding an organic solvent, a method of heating an adherend, a method of using an aqueous two-component adhesive, and the like have been proposed. However, these methods are not yet fully satisfactory. For example, the method of adding an organic solvent has problems such as environmental pollution and the danger of fire.The method of heating the adherend requires equipment and energy, cannot be expected to be effective, and depends on the place of the adherend. In some cases, heating cannot be performed, which is not sufficient. Also,
The method using an aqueous two-component adhesive comprises a main agent and a curing agent. The main agent and the curing agent are simultaneously sprayed onto the adherend with a two-head gun, or the main agent and the curing agent are separately applied to the adherend. There is an inconvenience of pasting after applying to the surface.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a one-pack aqueous quick-drying adhesive which overcomes the above-mentioned drawbacks of the conventional adhesive, and which is stable and exhibits an extremely fast initial adhesive strength. I do.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the disadvantages of the conventional adhesives,
Select from synthetic resin and natural resin with solid content of 40-85%
It has been found that a mixture containing the obtained aqueous emulsion of a resin and a certain aromatic oligomer is one-pack stable, has an extremely fast initial adhesive strength, and is useful as a quick-drying adhesive. It was completed.

That is, the present invention relates to (A) a solid content of 40 to 85.
Met% of synthetic resin and the natural resin from the chosen resin aqueous emulsion (B) one-component aqueous immediate drying adhesive containing an aromatic oligomer represented by the following general formula (I)
And the amount of the component (B) is 10% of the solid content of the component (A).
0.5 to 50 parts by weight with respect to 0 parts by weight
And a one-pack aqueous quick-drying adhesive. General formula (I)

[0008]

Embedded image (Where n is an integer of 2 to 10, and R is C _m H
_{In 2m + 1} , m is an integer of 1 to 4. )

The aqueous emulsion of the component (A) used in the present invention is appropriately selected from commonly used synthetic resin and natural resin emulsions. Specifically, for example, polyvinyl acetate, acrylic acid ester or vinyl versate and vinyl acetate copolymer, acrylic acid ester, methacrylic acid ester and styrene various homopolymers or copolymers, ethylene-vinyl acetate copolymer, Multi-component copolymers such as ethylene-vinyl acetate-acrylate and vinyl versatate, polyolefin, styrene-butadiene copolymer, acrylonitonyl-butadiene copolymer, polychloroprene, polyisoprene, polyurethane, polyepoxy asphalt, styrene-isoprene copolymer An aqueous emulsion mainly containing a polymer, a maleic acid-isoprene copolymer, a polyvinyl chloride, a vinylidene chloride copolymer, a polyvinyl alkyl ether, a phenol-formalin reactive mixture, and a resin such as a natural rubber. , If desired, rosin, modified phenolic resin, terpene, petroleum resin, tackifiers such as cumarone-indene resin, calcium carbonate, clay, silica, fillers such as asbestos, higher alcohols, various glycols, various phthalates, Plasticizers such as cellosolves and texanol, film-forming aids, coloring agents such as titanium white and other dyes and pigments, antioxidants, ultraviolet absorbers, oxygen absorbers, antioxidants such as various thickeners, etc. And a solid content of 40 to 85%, preferably 50 to 75%.

When the solid content of the aqueous emulsion is less than 40%, the solid content of the adhesive is too low even if an aromatic oligomer is added, and the quick drying property is poor. When the solid content of the aqueous emulsion is more than 85%, the viscosity becomes high when an aromatic oligomer is added, resulting in poor workability.

The aromatic oligomer of the component (B) used in the present invention is represented by the general formula (I). N in the general formula (I) is 2 to 10, preferably 2 to 3.

The aromatic oligomer represented by the general formula (I) is obtained by subjecting a certain aromatic fraction obtained in a petroleum refining process and formaldehyde as raw materials to an addition condensation reaction in the presence of an acid catalyst. It is a novolak type resin, and commercially available products include liquid resins such as Oligotech 1000, Oligotech 1020, Oligotech 1030, Oligotech 1040, and Oligotech 1100 manufactured by Mitsubishi Petroleum Corporation.

Oligotech includes solid resin, liquid resin and emulsified resin obtained by emulsifying the resin. From the viewpoint of compatibility with the resin component of the aqueous emulsion, use of the above-mentioned liquid oligotech is preferred.

The amount of the aromatic oligomer of the component (B) represented by the general formula (I) is preferably 0.5 to 50 parts by weight based on 100 parts by weight of the solid content of the aqueous emulsion of the component (A). In particular, 2 to 30 parts by weight is suitable. When the blending amount of the aromatic oligomer of the component (B) is less than 0.5 part by weight, the effects described above are insufficiently exhibited. Also,
If the blending amount of the aromatic oligomer of the component (B) is more than 50 parts by weight, the plasticizing effect is too strong, and the cohesive strength of the resin is reduced, which is not preferable.

[0015]

The role of the aromatic oligomer of the component (B) is to plasticize the resin component in the aqueous emulsion of the component (A), to provide more flexibility and to improve the tack of the resin film, Improves wettability to water and helps resin penetration. In particular, when added to an aqueous emulsion in the form of a liquid, the viscosity of the emulsion is improved, and the adherends are in a wet state as an adhesive, as if they were adhered to each other, making it difficult for the adherends to peel off from each other. The time required for fastening can be greatly reduced.
Further, since the aromatic oligomer is a property of an oligomer, it hardly evaporates and contributes to an increase in the solid content of the aqueous emulsion. Therefore, the drying speed can be greatly increased. Can be remarkably accelerated.

The one-component aqueous quick-drying adhesive of the present invention is particularly effective when at least one of the adherends is porous and water-absorbing. Further, the one-pack aqueous quick-drying adhesive of the present invention can be applied to water-based paints, and by the same action and effect as described above, improves the viscosity of the paints and enhances the wettability to adherends. It is possible to improve the adhesive force and at the same time significantly improve the drying property. Further, application to a caulking material or a sealing material can be expected assuming a similar effect.

[0017]

The present invention will be described below in more detail with reference to examples and comparative examples.

Example 1 Oligotec 1030 (manufactured by Mitsubishi Petroleum Co., Ltd.) as an aromatic oligomer per 100 parts by weight of a solid content of an ethylene-vinyl acetate copolymer emulsion having a solid content of 60%.
20 parts by weight and 3 parts by weight of a polyether-type thickener were added, and the mixture was stirred for 1 hour with a disper.
An adhesive of cps was made.

Examples 2 to 8 and Comparative Examples 1 to 4 Oligotec 1030 (manufactured by Mitsubishi Petroleum Co., Ltd.) as an aromatic oligomer and a polyether-type thickener based on 100 parts by weight of the solid content of the aqueous emulsion Were mixed at the ratios shown in Tables 1 to 3 and stirred for 1 hour with a disper to prepare an adhesive. Table 1 shows the solid content and viscosity of the obtained adhesive.
~ Shown in Table 3.

[0020]

[Table 1]

[0021]

[Table 2]

[0022]

[Table 3]

The above-prepared adhesives were applied in a length of 60 c.
7 g of a 30-cm-wide rock wool decorative board was wet-coated, bonded to a gypsum board, and the time required for adhesion (initial adhesion) was measured. The results are shown in Tables 4 to 6.

Next, the same various adhesives were applied to liner paper for 50 times.
g / m ² , the liner papers were stuck together, and the time required for adhesion (initial adhesion) was measured. The results are shown in Tables 4 to 6.

The above-mentioned various adhesives were applied to a 4 × 4 cm straight-grained straight-grained board (volume density 0.5 g / cm ³ ) at a rate of 100 g / m 2.
² Coating, immediately adhere to the straight-grained board of makanba, 1 minute after tensile adhesion (initial adhesion) and 20 ℃ × 65% R
The tensile adhesion after drying in a constant temperature chamber of H for 24 hours was measured. The results are shown in Tables 4 to 6.

[0026]

[Table 4]

[0027]

[Table 5]

[0028]

[Table 6]

As is evident from Tables 4 to 6, it is recognized that the one-pack aqueous quick-drying adhesive of the present invention has an extremely fast initial adhesive strength particularly to a porous adherend.

[0030]

The one-pack water-based quick-drying adhesive of the present invention is stable in one-pack and has a very short initial adhesive strength. And the like can be effectively used as an adhesive.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Kazuhiko Mitsui 2-3-18 Nakanoshima, Kita-ku, Osaka City, Osaka Inside Daiken Kogyo Co., Ltd.

Claims (1)

(57) [Claims] 1. A synthetic resin having a solid content of 40 to 85% .
And the aqueous emulsion of selected resins from natural resins (B) A one-component aqueous immediate drying adhesive containing an aromatic oligomer represented by the following general formula (I), and component
The blending amount of (B) is based on 100 parts by weight of the solid content of component (A).
A one-pack aqueous quick-drying adhesive characterized in that the amount is 0.5 to 50 parts by weight . General formula (I) (However, n is an integer of 2 to 10, and R is C _m H
_{In 2m + 1} , m is an integer of 1 to 4. )