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Adhesive composition and method of bonding

A composition and adhesive technology, applied in the direction of adhesives, etc., can solve problems such as the need for further improvement of adhesive strength

Inactive Publication Date: 2007-04-18
TOAGOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a hot-melt adhesive is solvent-free and relatively easy to coat the substrate, so it is practical, but the adhesive strength needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the 500ml flask that condenser and stirring device are equipped with, add the toluene / methyl ethyl ketone=80 / 20 of 225g as solvent, the Tuftec M-1913 ( SEBS, styrene content 30% by weight), 5 g of PolytelH (molecular weight 3000) produced by Mitsubishi Chemical Corporation as a polyolefin polyol, 25 g of Escot 5320HC (hydrogenated dicyclopentadiene) produced by Tonex Co., Ltd. as a tackifier Vinyl resin, softening point 125°C), with respect to the total amount of the above-mentioned thermoplastic elastomer, polyolefin polyol, and tackifier, add 50 ppm of dibutyltin dilaurate (hereinafter referred to as DBTL) as a reaction accelerator, in It heat-stirred at internal temperature 50 degreeC for 3 hours, and obtained the composition.

[0036] CORONET HX produced by Nippon Polyurethane Industry Co., Ltd. as a polyfunctional isocyanate was mixed with the above composition cooled to room temperature so that the molar ratio (NCO / OH) of the isocyanate group to the hydroxyl gr...

Embodiment 2～7

[0042] The solvent, carboxyl-containing thermoplastic elastomer, polyolefin polyol, tackifier, DBTL and multifunctional isocyanate were used in the proportions shown in Table 1 to obtain an adhesive composition. The obtained adhesive composition was evaluated similarly to Example 1, and Table 1 shows the result. On the other hand, in the evaluation results related to adhesion durability, the adhesives of Examples 1 to 7 were all "no change".

[0043] In addition, details of the compounds described in Table 1 are as follows.

[0044] Claiton FG-1901X: Carboxyl-containing thermoplastic elastomer (SEBS type, styrene content is 30% by mass) produced by Claiton Polymer Co., Ltd.;

[0045] Tuftec M-1943: Elastomer produced by Asahi Kasei Industry Co., Ltd. (SEBS type, styrene content is 20% by mass);

[0046] Polytel HA: polyolefin polyol (molecular weight 2000) produced by Mitsubishi Chemical Corporation;

[0047] Clearon P-85: a tackifier produced by Yasuhara Chemical Co., Ltd....

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Abstract

An adhesive with which polyolefin resins can be bonded while attaining a high initial bond strength and which has excellent adhesion durability especially at high temperatures. The adhesive is an adhesive composition comprising: a liquid composition obtained by dissolving or dispersing a carboxylated thermoplastic elastomer (A), a polyolefin polyol (B), and a tackifier (C) in an organic solvent; and a polyfunctional isocyanate (D). Preferably, the ratio of the weight of the carboxylated thermoplastic elastomer (A) to that of the polyolefin polyol (B) in the liquid composition is from 98 / 2 to 20 / 80 and the amount of the tackifier (C) is 5 to 150 parts by weight per 100 parts by weight of the sum of the ingredients (A) and (B).

Description

technical field [0001] The present invention relates to a two-component liquid adhesive composition, and more specifically, to a two-component adhesive having high initial bond strength, final bond strength, and good bond durability for bonding polyolefin resins. Mixture composition. Background technique [0002] In general, polyolefin resins such as polyethylene and polypropylene are known to be difficult to bond with an adhesive. However, many proposals have been made regarding adhesives applicable to such polyolefin resins. Specifically, a thermoplastic elastomer such as a copolymer obtained by hydrogenating a styrene / isoprene / styrene block copolymer or a styrene / butadiene / styrene block copolymer as a main component has been proposed. Solutions for hot melt adhesives. [0003] In Japanese Patent Application Laid-Open No. 62-48779 (claims), a hot-melt type adhesive comprising the above-mentioned thermoplastic elastomer, hydrocarbon resin tackifier, wax, and hydrocarbon ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C09J123/08C08G18/69
CPCC08G18/69C09J175/04
Inventor 尾锅隆行今堀诚
Owner TOAGOSEI CO LTD