Crumb of block copolymer and adhesive composition

A technology of block copolymers and polymers, applied in the direction of film/sheet-like adhesives, adhesives, bonding methods, etc. The effect of excellent performance and low odor characteristics

Active Publication Date: 2017-02-22
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesive adhesive composition obtained by using these block copolymers has insufficient balance of holding power, initial tack, and adhesive force, and improvement of these has been desired, and various proposals have been made

Method used

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  • Crumb of block copolymer and adhesive composition
  • Crumb of block copolymer and adhesive composition
  • Crumb of block copolymer and adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0339] The present embodiment will be described in detail below with specific examples and comparative examples, but the present embodiment is not limited to the following examples. In addition, in the following examples and comparative examples, the measurement of the characteristic and physical property of a polymer was performed by the following method.

[0340] [(1): Characteristics of block copolymer crumbs]

[0341]

[0342] Regarding the weight-average molecular weight of block copolymer crumbs, use a calibration curve (prepared using the peak molecular weight of standard polystyrene) obtained from the measurement of commercially available standard polystyrene, and obtain the block based on the peak molecular weight of the chromatogram. The weight average molecular weight of the copolymer crumb. When the block copolymer is a block copolymer composition composed of two different structures of the component (A) and the component (B), the peak with the smallest weight a...

manufacture example 1

[0486] 0.3 parts by mass of octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate was added to the block copolymer solution 2 with respect to 100 parts by mass of the above-mentioned block copolymer , for thorough mixing. The hydrogenated block copolymer solution was stripped at 95°C for 1 hour. In the stripping, Na salt of a styrene-maleic anhydride copolymer was added as a crumb reducing agent.

[0487] The aqueous slurry containing hydrogenated block copolymer composition crumbs in the obtained aqueous slurry was sent to a vibrating sieve with a mesh of 1 mm for dehydration treatment (), and then the history was measured by the above-mentioned method. The water content of the hydrogenated block copolymer crumbs in was shown. The water content at this time was 50% by mass.

[0488] The hydrogenated block copolymer crumbs were dehydrated and dried using separate devices.

[0489] First, it was supplied to a single-screw extruder type water squeezer, and extruded at a...

manufacture example 2～9

[0494] In addition to changing the block copolymer solution used as shown in Table 2, the moisture content of the crumbs at the outlet of , the outlet temperature of the first stage of , and the outlet temperature of the second stage of Block copolymer crumbs were obtained in the same manner as in Production Example 1 except for the moisture content of the crumbs. The crumbs of the block copolymer were measured by the same method as in Production Example 1, and the results are shown in Table 2.

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Abstract

The invention provides a crumb of block copolymer and an adhesive composition. The crumb of a block copolymer has excellent transportability and is capable of forming an adhesive composition that has excellent solubility, low melt viscosity characteristics and low odor characteristics, with an excellent balance among these characteristics, in cases where the crumb of a block copolymer is used in the adhesive composition. The present invention relates to a crumb of a block copolymer, which contains a polymer block mainly composed of at least one vinyl aromatic hydrocarbon monomer unit and a polymer block mainly composed of at least one conjugated diene compound monomer unit and has a weight average molecular weight of 20,000-1,000,000, while having a specific surface area, a cumulative pore volume of pores having pore radii of 1-100 [mu]m and an average pore radius respectively within specific ranges.

Description

technical field [0001] This invention relates to crumbs of block copolymers and adhesive adhesive compositions using the same. Background technique [0002] In recent years, from the aspects of saving energy, saving resources, and reducing environmental loads, hot-melt adhesives have been widely used. As the base polymer of hot-melt adhesives, vinyl aromatic adhesives have been widely used. Monomer-conjugated diene-based monomeric block copolymer (for example, SBS: styrene-butadiene-styrene-block copolymer, etc.). However, the pressure-sensitive adhesive composition obtained using these block copolymers has insufficient balance of holding power, initial tack, and adhesive force, and improvement of these has been desired, and various proposals have been made. [0003] For example, Patent Document 1 discloses an adhesive adhesive composition composed of a triblock copolymer and a diblock copolymer. Patent Document 2 discloses an adhesive adhesive composition composed of a bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F6/00C08F297/04C08L53/02C09J11/00C09J153/02
CPCC08F297/044C09J153/025C09J7/387C09J7/255C08F6/00C08F297/04C08L53/02C09J11/00C09J153/02C09J2301/414C08F2500/24C09J5/00C09J2453/00C09J2467/006
Inventor 中谷浩介久保伸明中岛滋夫久末隆宽涩谷健太
Owner ASAHI KASEI KK
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