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Block copolymer for adhesive, production method therefor, and adhesive composition

A technology of block copolymers and manufacturing methods, applied in the direction of adhesives, etc., can solve the problems of insufficient improvement effect and insufficient balance of adhesive adhesive properties, etc., and achieve excellent solubility, good balance of properties, and excellent adhesion and bonding properties Effect

Active Publication Date: 2015-06-17
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the adhesive composition or adhesive composition using SBS or SIS, the balance of the adhesive adhesive properties of adhesive force, initial adhesion force and holding force is not sufficient, so it is desired to improve these properties. As these improved methods, Patent Document 3 and Non-Patent Document 1 disclose an adhesive composition containing a triblock copolymer and a diblock copolymer
[0003] However, in any of the above-mentioned compositions for adhesives and compositions for adhesives, the effect of improving the above-mentioned various performances is not sufficient.

Method used

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  • Block copolymer for adhesive, production method therefor, and adhesive composition
  • Block copolymer for adhesive, production method therefor, and adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0275]With respect to 100 parts by mass of the block copolymer (polymer 1), 300 parts by mass of ARKON M100 (manufactured by Arakawa Chemical Industry Co., Ltd.) Co., Ltd.), and use a pressurized double-wrist kneader (model: D0.3-3, manufactured by Moriyama Manufacturing Co., Ltd.) to melt and knead at 180°C for 30 minutes to obtain light yellow Homogeneous hot melt adhesive adhesive composition.

[0276] It should be noted that in the adhesive adhesive composition, 1 part by mass of 2-tert-butyl-6-(3- tert-Butyl-2-hydroxy-5-methylbenzyl)-4-methylphenylacrylate.

[0277] According to the measurement method of the above-mentioned adhesive adhesive composition, the measurement results are as follows: the melt viscosity (at 180°C) is 920 (mPa·s), and the softening point is 89.8°C.

[0278] In addition, the applicability was good, and the ring tack was 53.4 N / 15 mm, the adhesive force was 30.7 N / 10 mm, and the holding power was 10.3 minutes, which was practically very good.

Embodiment 2～4

[0279] [Examples 2-4], [Comparative Examples 1-10]

[0280] According to the combination shown in the following Table 1 and Table 2, according to the same method as Example 1, using ARKON M100 as a tackifier, using Diana Process Oil PW-90 as a softener, respectively prepare adhesive adhesive compositions, evaluate its properties.

[0281] It should be noted that, if the kneading torque was not stabilized after 40 minutes of kneading, kneading was continued until the torque became stable.

[0282] [Table 1]

[0283]

[0284] [Table 2]

[0285]

[0286] It can be seen that the block copolymers for pressure-sensitive adhesives (polymers 1 to 4) of Examples 1 to 4 all have practically good finishing properties.

[0287] In addition, it was found that any of the pressure-sensitive adhesive compositions of Examples 1 to 4 had good adhesive properties such as loop initial tack (adhesiveness), adhesive force, and holding power, and that these properties were well-balanced. E...

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Abstract

[Problem] To provide a block copolymer for adhesive that has a good finish, and an adhesive composition that has an excellent adhesive property and a good performance balance, and further an excellent solubility and coatability. [Solution] A block copolymer for adhesive, containing at least two polymer blocks of vinyl aromatic monomer unit (A) and at least one polymer block (B) containing conjugated diene monomer unit as a main component, wherein the amount (% by mass) of polymer blocks of vinyl aromatic monomer unit in the polymer block of vinyl aromatic monomer unit (A) is 95.0 to 99.0% relative to the total amount of vinyl aromatic monomer unit (% by mass) that has been used for polymerizing the polymer block of vinyl aromatic monomer unit (A), and the block copolymer for adhesive selectively contains block copolymer components (a) to (d) that have a specific structure provided with the polymer blocks (A) and (B).

Description

technical field [0001] The present invention relates to a block copolymer for adhesives, a method for producing the same, and an adhesive composition. Background technique [0002] In recent years, vinyl aromatic monomer-conjugated diene monomer block copolymers (SBS: styrene-butadiene- Styrene Block Copolymer, SIS: Styrene-Isoprene-Styrene Block Copolymer). For example, Patent Document 1 and Patent Document 2 disclose an adhesive composition or an adhesive composition using SBS. However, for the adhesive composition or adhesive composition using SBS or SIS, the balance of the adhesive adhesive properties of adhesive force, initial adhesion force and holding force is not sufficient, so it is desired to improve these properties. As these improvements, Patent Document 3 and Non-Patent Document 1 disclose an adhesive composition containing a triblock copolymer and a diblock copolymer. [0003] However, in any of the above-mentioned compositions for pressure-sensitive adhesiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08L53/02C09J11/00C09J153/02
CPCC08L53/02C08L2205/02C09J11/00C09J153/02C08F293/00
Inventor 中岛滋夫
Owner ASAHI KASEI KK
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