JPS61126191A - Three-component releasable treatment layer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Application] The present invention consists of a water-soluble polyester V resin, a long-chain alkyl compound, and a special copolymer, and is suitable for adhesion to substrates, especially HolJ Esthe V-based substrates. The present invention relates to a releasability treatment comprising a new releasability treatment agent suitable as a release agent, which has excellent properties and can control releasability.

[Conventional technology]

Release paper is used to protect or preserve the adhesive surface of adhesive tapes, labels, etc. Release paper is generally a paper base material such as glassine paper or kraft paper, or a film made of polyester film, etc., which is provided with a release agent or release treatment agent to impart release properties. It's getting better.

By the way, the release paper has enough adhesion to the base material to prevent the releasable treated layer from easily falling off from the base material due to mechanical impact force, and a releasability that is sufficient to prevent the release paper from falling off from the base material when the release paper is peeled off from a sticky substance such as an adhesive. Releasability to the extent that the treatment agent can be easily peeled off is desired due to the transfer of the treatment agent to the adhesive substance layer or the transfer of the adhesive substance to the releasability treatment layer.

Conventionally, long-chain alkyl compounds having an ethylene urea group or an N-methylol group have been known as release treatment agents for forming the release paper (Japanese Patent Laid-Open No. 52-688).
No. 5, JP-A-52-788:13).

[Problems to be solved]

However, the releasable treatment agent of the above invention did not have sufficient adhesion to polyester thread base materials such as polyester films.

In other words, when this is applied to a polyester base material, its adhesive strength is poor, and the formed releasable treated layer easily falls off from the base material, resulting in a balance between adhesive strength to the base material and releasability from adhesives, etc. There is also the problem of being inferior in gender. Therefore, in the case of a release material made of a polyester base material provided with this releasable treatment layer, when it is attached to an adhesive tape or label, etc., and then peeled off, the releasability treatment agent is removed from the adhesive substance V.
There are six nine inconveniences, such as the adhesion of adhesive tapes and tapes, etc., decreasing due to adhesion to the - side.

[Means for solving problems and their effects]

The present inventors have overcome the above problems, have satisfactory adhesion even to polyester V-based substrates, have excellent balance with releasability, and can control releasability as appropriate. As a result of intensive research to develop a releasable treatment agent, it was discovered that this objective could be achieved with a product consisting of a water-soluble polyester resin, a long-chain alkyl compound, and a special copolymer. This finding led to the present invention.

That is, the present invention is based on water-soluble polyester resin 100
Parts by weight, β) 5 to 100 parts by weight of a long-chain A-V compound having an ethylene urea group or an N-methylol group, a copolymer of a monomer having 0 carboxyl groups and a different type of monomer Peelability treatment II formed with a peelability treatment agent consisting of 30 to 800 parts by weight and an O liquid medium! It provides:

In the present invention, the water-soluble polyester resin (1) is mainly used as an agent to provide adhesion to the base material, particularly to the polyester base material, and is used as an agent to provide long-chain alexyl compounds (2) to the long-chain alexyl compound, mainly to provide release properties. Polymers (Q) are mainly used as capture agents for long-chain A/M compounds.Water-soluble ytFIJ resins are also used to enable the preparation of aqueous treatment agents. By using a water-based stripping treatment agent, pollution, explosions, fires, etc. can be avoided, there is no need to recover organic solvents, reducing production labor, and deterioration of the base material can be prevented. There are advantages.

On the other hand, by changing the blending ratio of the long-chain A/M compound in the releasable treatment agent, the balance between adhesive strength to the substrate and releasability from the adhesive substance can be adjusted. That is, the releasable treatment layer formed by applying the releasable treatment agent of the present invention, which is formed by mixing each component (A, B, and C) through a liquid medium to a base material and drying it, Due to the phase separation phenomenon in the process, the force V in the copolymer
The content ratio of long-chain alkyl-based compounds ranging from a layer state in which the long-chain alkyl-based compounds reacted with the boxy V group are largely distributed on the surface side of the treated layer to a good state in which they are scattered throughout the water-soluble polyester resin. This changes the balance between adhesive strength and releasability. As a result, it becomes possible to control the balance between adhesive strength and releasability.

Water-soluble polyester resin used in the present invention (3
) is a polyester resin, which is a condensation reaction product of a polybasic acid such as terephthalic acid or trimellitic acid, and a polyhydric alcohol such as ethylene glycol or glycerin. ! The benzene ring is sulfonated with a sulfonating agent such as sulfuric acid or sulfur trioxide, and this is neutralized with a neutralizing agent such as an aqueous sodium hydroxide solution, an aqueous potassium hydroxide solution, or aqueous ammonia to create a water-soluble product. You can give examples such as: Specific examples include "Gagsen EI9-903J,""GagsenES-904J,"
Gabsen E8-905J, “Gabsen E8-2011J
(Both product names: Teikoku Kagaku Sangyo Co., Ltd.). In the present invention, when it is made into a 25% by weight aqueous solution, the viscosity at 25°C is 100 to 1011.
011 Seven centipoise, especially those with 200 to 8000 centipoise, are the coating properties of the resulting release treatment agent, the physical properties of the release treatment to be formed (balance between adhesive strength and releasability, etc.), especially polyester It is preferably used in terms of its physical properties when applied to a base material.

On the other hand, as the long-chain alkyl compound (b), one having an ethylene urea group or an N-methylol group is used in order to react with the copolymer described below. It is desirable that the long-chain acyl group in this compound has 16 to 24 carbon atoms in terms of the properties of the releasable treatment agent obtained and the physical properties of the releasable treatment sheet formed. Typical examples thereof include octadenylethylene urea and N-methylo-M higher fatty acid amide.

On the other hand, in the present invention, the copolymer 0 mainly used as a trapping agent for the long-chain alkyl compound is an ethylenically unsaturated monomer having a V-phoxyl group represented by acrylic acid, methacrylic acid, crotonic acid, etc. and ethylenic unsaturated compounds such as acrylic V-based, methacrylic-based, vinyl ester-based, represented by methyl methacrylate, ethyl acrylate, butyl acrylic acid, octyl acrylic acid, vinyl acetate, acrylonitriv1 styrene, etc. Examples include monomers that are different from the monomer having a carboxyl group and that are copolymerizable with the monomer.

As mentioned above, in the present invention, it is desirable to use an aqueous stripping treatment agent, so each of the above-mentioned components is an aqueous solution of water-soluble VL+T Esthe M resin, an aqueous dispersion of the long-chain alkyl M compound, The copolymer is preferably used in the form of an aqueous dispersion. Specific examples of the aqueous dispersion of the long-chain alkyl M compound include "Oftex EMJ (trade name: manufactured by Hodogaya Chemical Co., Ltd.), [Unibewon WAJ (trade name:
Commercially available products include Palladium 8PJ (trade name, manufactured by Ni-Ohara Bawodium Co., Ltd.) and Palladium 8PJ (trade name, manufactured by Ni-Ohara Baodium Co., Ltd.).

In addition, as an example of an aqueous dispersion of the copolymer, 10 parts by weight of a monomer having a V-phoxyl group and 40 to 990 parts by weight of another type of monomer copolymerizable therewith are mixed in water, a surface-active Power obtained by copolymerization in the presence of agents, polymerization initiators, etc. Examples include emulsion, a copolymer containing 1 to 20% by weight of a Reixyl group-containing monomer. In addition, the emulsion seal can be made of polyvinyl vinyl if necessary! A stabilizer such as real alcohol, a thickener such as polyacrylic acid, etc. may be used.

The release treatment agent in the present invention includes (6) 100 parts by weight of a water-soluble polyester resin, 5 to 100 parts by weight of the long chain V-kyl compound, and 30 to 300 parts by weight of the copolymer (both (as solid content).

If the blending ratio of the long-chain alkyl compound is less than 5 parts by weight, a releasable treatment with sufficient releasability will not be formed.
On the other hand, if the amount exceeds 100 parts by weight, a portion that cannot react with the V-phoxyl groups in the copolymer will remain;
This is undesirable because it lowers the adhesive strength of adhesives and causes irritation.

On the other hand, if the blending ratio of the copolymer is less than 30 parts by weight, there will be a shortage of carboxyl groups and unreacted substances of the long-chain alkyl compound will remain; on the other hand, if the blending ratio exceeds 300 parts by weight, the As a result, the water-soluble polyester resin is insufficient, and the resulting releasable treatment 1 has insufficient adhesive strength, making it unsuitable for use on polyester base materials.

The releasable treatment agent in the present invention includes each of the above components (A, B
and C) ff! It consists of something mixed through a medium. The amount of the liquid medium to be used is preferably such that the solid content concentration is 5 to 50% by weight, from the viewpoint of coating properties of the resulting releasable treatment agent.

Then, the above-mentioned releasable treatment agent is applied to, for example, a base material, and the releasable treatment layer of the present invention is made of a water-soluble polyester resin and a reaction product of the long-chain alkyl compound and the copolymer. is formed. The thickness of the peelable treated layer to be formed is 0.1 to 6 pfn, especially <0.
1 to 1.5 am is suitable, but not limited thereto.

〔Effect of the invention〕

According to the present invention, since a water-soluble polyester/I/resin, a special long-chain alkyl M compound, and a copolymer are used, it can be used for polyester I-based substrates used for forming release papers, adhesive tapes, etc. However, it is possible to obtain a releasable treatment w with an excellent balance between adhesive strength and releasability. Therefore, it is possible to obtain release paper, adhesive tape, etc. made of a polyester base material in which the releasable treated layer is prevented from easily falling off from the base material in practical use.

Further, it is possible to obtain a releasability treatment agent in which the balance between adhesive force and releasability is appropriately controlled, and it is possible to form a releasability treatment @ corresponding to the properties of the base material, adhesive, etc.

〔Example〕

Next, the present invention will be explained in more detail with reference to Examples.

Reference example 1 7 parts by weight of acrylic acid, 20 parts by weight of methyl methacrylate,
Aku+7 V acid ethyl 1v 80 parts by weight, 100 parts by weight of water, and 3 parts by weight of Neugen EA-120i as a surfactant.
51 parts by weight of Neodan R (all manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) was placed in an aoox four-volume flask and replaced with nitrogen for 40 minutes, then heated to 65°C, and then 0.3 parts by weight of ammonium persulfate was added to it. 1 part was added and polymerized while stirring.

In this way, the polymerization rate of 7 was 98.2%, the viscosity was 5150 cp (25
℃), and a copolymer emulsion with a solid content concentration of 51.6% by weight was obtained.

Reference Example 2 17 parts by weight of methacrylic acid, 75 parts by weight of butylene acrylic acid, 14 parts by weight of acrylonitrile, 100 parts by weight of water,
Using 8 parts by weight of HytenortVN-17 (surfactant; Dai-Kogyo Seiyaku Co., Ltd. all) and 0.8 parts by weight of ammonium persulfate, a polymerization rate of 96.8% was obtained in the same manner as in Reference Example 1.
A copolymer Emma V sheath with a viscosity of 180 Cp (25°C) and a solid content concentration of 50.5% by weight was obtained.

Example 1 Water-soluble polyester resin (Gagsen E8-904) 2
Emulsion of octadecyethylene urea containing 100 parts by weight of a 5% by weight aqueous solution and 25% by weight of solids (Oftex E)
M) 60 parts by weight, copolymer emulsion 10 of Reference Example 1
The release agent obtained by mixing 0 parts by weight was applied to a polyester film 5-tO (manufactured by Toshi Co., Ltd., thickness 25 μm), and dried by heating at 140° C. for 2 minutes to a thickness of 0.5 μm. The film was obtained which had a releasability treatment of .

Next, the peeling force and shedding property of the obtained polyester film were examined by the following method. The results are shown in the table. Note that the parts by weight of each component in the table are values as solid content (the same applies hereinafter).

[Peeling force]

Treatment of polyester film provided with releasability treatment 1fjj
Polyester adhesive tape (A 81 B i
(manufactured by Nitto Electric Industry Co., Ltd.), 1M, 1 degree, 25°C, 65% humidity.
It was pasted using a roll with a load of '1kg0 in an atmosphere of
The film was peeled off at 180 degrees using a Tensilon tensile tester (manufactured by Shimadzu Corporation) under the condition of 0 try/min.
＞The peeling force was investigated.

[dropping]

Separation housing f installed in Holj Esthetic V Film! Al! !
The surface of the film was rubbed forcefully with the thumb to see if it would peel off. The evaluation was rated as t-0 if it could not be peeled off, and the evaluation was rated as x if it could be easily peeled off.

Examples 2 to 4 A releasable treatment agent having the composition shown in the table was prepared in the same manner as in Example 1, and the releasable treatment agent was formed and evaluated. The results are shown in the table.

In addition, the solid content concentration of the raw materials used was the following value.

"Gapsen E8-2011J and"Gapsen E8-90
5J: 25% by weight, Uniperan WAJ and Baodium 8PJ: 25% by weight, Comparative Example 1: 60 parts by weight of Oftex EM, and 100 parts by weight of the copolymer Emma M Difurin of Reference Example 1. was prepared, and its peelability treatment agent was formed and evaluated in the same manner as in Example 1. The results are shown in the table.

Comparative Example 2 A release treatment agent was prepared in the same manner as in Comparative Example 1 using 61.9 parts by weight of Octe, VxEM and 50 parts by weight of the copolymer emulsion of Reference Example 2, and a release treatment layer was formed. and evaluated it. The results are shown in the table.

From the table, the adhesion to the polyester base material (shedding property) is improved by blending water-soluble polyester/L/resin, and the peeling force can be controlled by changing the blending ratio of the long-chain alkyl compound. It can be seen that the releasable treated layer of the present invention has a practically sufficient balance between adhesive strength and releasability.

Claims (1)

[Claims] 1. (A) 100 parts by weight of water-soluble polyester resin, (B
) 5 to 100 parts by weight of a long-chain alkyl compound having an ethylene urea group or an N-methylol group, (C) a copolymer of a monomer having a carboxyl group and a different type of monomer 3
A releasable treatment layer formed of a releasable treatment agent consisting of 0 to 300 parts by weight and (D) a liquid medium. 2. The release agent is an aqueous solution consisting of a mixture of an aqueous solution of a water-soluble polyester resin, an aqueous dispersion of a long-chain alkyl compound, and an aqueous dispersion of a copolymer. The treatment layer according to item 1. 3. The treatment layer according to claim 1, which is applied to a polyester base material.