JPH01110581A - Reactive tacky agent composition - Google Patents

Abstract

PURPOSE:To obtain a reactive tacky agent composition, consisting of a saturated polyester resin which is a solid at ordinary temperature, etc., (meth)acrylic urethane monomer having a specific viscosity at ordinary temperature, etc., having moderate tackiness at ordinary temperature and curable with light, etc., to provide strong adhesive force. CONSTITUTION:A reactive tacky agent composition, obtained by dissolving (A) one or more of a saturated polyester resin, acrylic rubber, acrylic elastomer, polybutadiene and acrylic tacky agent and (B) one or more of an acrylic or methacrylic urethane monomer, oligomer and other (meth)acrylic monomers and oligomers which are a solid at ordinary temperature having >=10<2>cP viscosity at ordinary temperature in a solvent and drying the solvent and suitable as sealing media. Furthermore, one or more of photo- or thermosetting catalyst or further magnetic substance, electric conductor, fluorescent substance, etc., are preferably contained in the above-mentioned components.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a reactive adhesive composition that is cured by heat or ionizing radiation. More specifically, this composition is a reactive pressure-sensitive adhesive composition that initially has adhesive strength but is cured by heat or light (secondary heat or light) to generate adhesive strength.

Adhesive tape is sticky at room temperature and can be attached to a single object without any preliminary operations. Moreover, it is used in many fields because of its ability to be reattached. However, adhesive tapes have the disadvantage that their adhesive strength is generally weaker than that of adhesives.

Also, since the tape is usually made by applying an adhesive to the tape base material, it can be used on areas with complex shapes, such as areas with steps, dents, or protrusions.
Due to the thickness, hardness, stiffness, etc. of the base material, it is impossible to paste it without gaps. Adhesive tapes also have problems with water resistance, solvent resistance, and heat resistance.

On the other hand, paints, adhesives, sealants, etc. can be applied to complex shapes, curved surfaces, holes, protrusions, steps, gaps, etc.
Since a curing reaction can also be utilized, it is advantageous for improving water resistance, solvent resistance, and heat resistance. However, these require pretreatment such as mixing a hardening agent before use, and because they are usually in the form of a sol or paste containing a solvent, they cannot be handled directly by hand.
It is cumbersome because it has to be in a container on a horizontal surface.

In addition, care must be taken to avoid contamination of areas other than the intended area due to construction flow, drips, and spray (2), and removal of contamination is extremely complicated and often impossible. .

In view of the above circumstances, we have worked diligently to create a product that combines the advantages of adhesives, paints, adhesives, and sealers, and eliminates these drawbacks, and as a result we have completed the present invention. . The product invented by the present invention has adhesive strength that allows it to be applied to the target object without any preliminary operation and fixed until curing is completed, and furthermore, even if pasting fails, it can be reapplied without any contamination. If possible, and after curing by some means, it has the same quality and performance as a paint, adhesive, sealer, protective film forming agent, or organic powder binder. The curing method depends on the purpose, process, properties of the pigment, and economic efficiency (= impregnation, heat, light, and ionizing radiation can be used.

Until now, thermosetting sheets, hot melt adhesives, and the like have already been commercially available, but there are still none that are adhesive and harden under normal conditions.

The present invention is a curable resin formed from an acrylic urethane monomer or oligomer that has a viscosity of 102 CpS or more at room temperature and has cohesive force and is solid at room temperature. ! 2
It is characterized by containing at least one type selected from Lz "Near"AT' acrylic adhesive on the tip 7 of #DameW7. From these combinations, it has suitable adhesive properties at room temperature, namely initial tack, holding power, and adhesion.
It can be easily cured by heat, light, or ionizing radiation, and after curing, it was possible to obtain a product with extremely strong or elastic physical properties. A feature of the present invention is that it achieves tackiness without using any low molecular weight tackifier resin. Therefore, it has excellent solvent resistance and heat resistance after curing. The above-mentioned acrylic pressure-sensitive adhesive is an acrylic polymer, an acrylic copolymer, or the like.

Monomers, oligomers, and low molecular weight reactive (meth)acrylate resins have poor cohesive force at room temperature even if they are solid. Furthermore, saturated polyester resins, polybutadiene resins, acrylic elastomers, and acrylic rubbers themselves do not react like reactive acrylates. By combining these two types of resins, the inventors succeeded in obtaining a curable composition that is adhesive under normal conditions.

The reactive resin used in the present invention has a viscosity of /θ2c at room temperature.
A resin having a cohesive force is a liquid or a solid having a glass transition point of less than or equal to room temperature and is normally solid. The reactive pressure-sensitive adhesive of the present invention can be obtained by uniformly dispersing or dissolving these resins by melting or dissolving them. The obtained product has no fluidity at room temperature and has appropriate adhesiveness and cohesive strength, so it can be supplied in any form. For example, they are string-like, pellet-like, sheet-like, and block-like.

Further, as a curing method, by adding a suitable catalyst such as a photosensitizer to the above-mentioned composition, it can be cured by heat or ionizing radiation, and in the case of heat, the curing temperature is appropriately adjusted. For example, the composition to which the catalyst has been added is spread on a release paper to make a sheet of reactive adhesive, and after applying the sheet to an adherend,
If you peel off the release paper and apply heat, you'll get a thick coating. It can also be used as a substitute for sealers and putty when applied to the joints and recesses of iron plates.

By using this reactive adhesive as a sealant, it is possible to easily seal areas that were previously difficult to apply using a gun. In addition, even if the application fails, the workability is greatly improved, as it can be removed cleanly and there is no contamination.Examples will be explained below.

〔Example/〕

Saturated polyester LP-02, 27 parts (Nippon Gosei)
(same as below 1 part seed) Urethane acrylate viscoat ♂7.2 3 parts (Osaka Organic) Inbutyl peroxide 7 parts with a solid content of 3
Two parts (nitoluene) were dissolved so that the amount was about 0 parts. Pour this solution into a box made of release paper and let the solvent dry!
A 00 μm adhesive film was made. In order to use the obtained film as a sealant, it was pasted on the seam of iron plates, and after peeling off the release paper, it was heated and cured at 750° C. for 30 minutes.

The hydrogenated oil in the above composition was sticky and could be reapplied. Also, during curing, the C2 acid melted, the corners of the sheet came off, and the gaps between the iron plates were filled. The hardened material did not change even after being soaked in boiling water for 7 hours.

[Example 2] The 5008 m long adhesive film obtained in Example 2 was punched to form a donut shape (=3) with an inner diameter of m.
Punched out. This was used as a washer for a bolt with an outer diameter of JWTS B, and was tightened to an iron plate with a nut, and then heated and hardened at 760° C. for 20 minutes.

The compositions were found to be melt hardening and suitable as a loosening or waterproof sealer.

[Example 3] Saturated polyester Pylon 20θ 20 parts Urethane acrylate Aronix M-1100030 parts (Toagosei ■) Silica fine powder Aerosil R-2722 parts (Nippon Aerosil ■) Pigment Titanium white Average particle size θ,! μm 2 parts Inbutyl peroxide / part Above (: The raw materials listed above were mixed in a kneader and poured into a silicone rubber mold for an emblem taken from a car body using an injection molding machine. After cooling, the emblem was molded. The body was taken out from the silicone rubber mold.This emblem molded body was molded into a car body (-
When the emblem molded product was pasted and cured by heating at 790° C. for 20 minutes, it was cured and firmly adhered to the vehicle body.

Also, when I sprayed paint on top of this, the adhesion was even better.

My father mixed the above-mentioned ingredients with the phosphor, made a Ti body in the same emblem shape, and pasted it on the car body.

When the emblem was pasted on, it emitted fluorescent light when it was darkened, and the letters appeared.

[Example D]

The sheet obtained in Example 1 was punched out in the shape of the area to be sealed. This made it possible to further improve the workability of sealing.

〔Example! ]

Saturated polyester LP-022, gO part (Nippon Gosei) Frethane acrylate resin art resin UN-9000 (Kigami Kogyo) Gu θ part Pigment Titanium white Average particle size 4tOμm 30 parts Perloyl IPP (Nippon Urashi) 2 parts Above formulation A toluene solution was prepared in the same manner as shown in Example 1, and poured into a mold to form a film with a thickness of 200 μm. This was pasted on an iron plate, allowed to harden, and its adhesion to the iron plate was examined.

The film cured on the iron plate has 10θ in the paint board test.
It was found that there was an adhesion of //θO.

[Example 6] Acrylic rubber door Acron PS-210 + θ part (
Toa Paint) Acrylate S-/22 90 parts (Nippon Oil & Fats) 3 parts of tert-butyl perbenzoate were dissolved with ethyl acetate C to a solid concentration of about 20%,
A polyester film having a thickness of 25 μm was used. Place this tape on the paper (double paste, / θ℃
I applied the iron for 2 seconds.

The adhesive will harden by applying an iron at 0°C for 2 seconds.
Paper (= adhered to the tape. After the tape had cooled, the polyester film was peeled off and the hardened adhesive remained on the paper, creating a tack-resistant film.

[Example 7] Acrylic rubber Door Acron PS-2/06
0 parts (Toa Paint) Acrylate UAS-1090 parts (Sanyo Kokuei Pulp) Irgacure 907 3 parts The above formulation was dissolved in ethyl acetate and coated on a polyester film having a thickness of 2 μm. This tape was pasted on a copper plate and irradiated with ultraviolet rays using a ♂θW/i high-pressure mercury lamp. The adhesive surface hardened and stuck to the copper plate. The electrical resistance of this film was 1013Ω.

[Example ♂]

Acrylic adhesive 60 parts Acrylate NK ester U-4tHA 4tQ part (Shin Nakamura) Perloil IPP (NoF) / part The above raw materials were dissolved in ethyl acetate and coated on a release-treated PET film to make a double-sided tape. Ta. Paste this double-sided tape between two metal plates and heat at 750℃ for 20 minutes.
The adhesive was cured for 1 minute and the shear adhesion was measured. The shear adhesive strength is /
00 Kg/c.

[Example wa]

Saturated polyester LP-θ114t 70 parts Acrylate resin C-9034t 30 parts (Sartomer) Perloyl IPP (NOF) 2 parts The above raw materials were dissolved in ethyl acetate and coated on the back side of the decoration sheet. This was pasted on an iron plate and heated with an infrared heater for 7.0 minutes to bond it.

[Example 10] The composition shown in Example 7 was coated on a copper foil with a thickness of 70 μm.
Attach a lead wire at the beginning of winding, wrap it 700θm around a 7-inch diameter core, and finish winding thickly (= the lead wire is attached.) Place this in a heating oven at 750℃, 90℃.
I made a thin coil by heating and curing it in minutes.

Patent applicant: Nichiban Co., Ltd. Procedural amendment July 79, 3rd year of Showa era

Claims (1)

[Scope of Claims] 1. At least one member selected from saturated polyester resin, acrylic rubber, acrylic elastomer, polybutadiene, and acrylic adhesive that is solid at room temperature, and (meth)acrylic urethane monomer having a viscosity of 10^2 cps or more at room temperature. , oligomers and other low molecular weight substances. 2 At least one selected from saturated polyester resins, acrylic rubbers, acrylic elastomers, polybutadiene, and acrylic adhesives that are solid at room temperature, and (meth)acrylic urethane monomers, oligomers, and other low-temperature viscosity of 10^2 cps or more at room temperature. A reactive pressure-sensitive adhesive composition containing at least one kind selected from molecular weight substances and a photo- or heat-curing catalyst. 3 At least one selected from saturated polyester resins, acrylic rubbers, acrylic elastomers, polybutadiene, and acrylic adhesives that are solid at room temperature, and (meth)acrylic urethane monomers, oligomers, and other low-temperature viscosity of 10^2 cps or more at room temperature. at least one selected from molecular weight substances, a curing catalyst, a magnetic material, an electrical conductor,
A reactive adhesive composition containing at least one selected from dielectrics, fluorescent materials, pigments, organic resin fine powders, inorganic powders, and metal powders.