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Adhesive composition

An adhesive and composition technology, applied in the direction of adhesives, polymer adhesive additives, adhesive additives, etc., can solve the problems of reduced heat resistance, limited use, etc., and achieves lower coating temperature, longer usable Effects of time, good strength and heat resistance

Active Publication Date: 2019-03-15
SUNSTAR GIKEN KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, in the hot-melt adhesive compositions described in Patent Documents 1 to 3, although the α-olefin polymer used has high crystallinity and a high melting point, good strength and heat resistance are obtained. , but since the usable time, that is, the time that the adhesive can be applied to the adherend after being applied to the adherend, is very short within a few seconds, its use is very limited.
In addition, the inventors of the present invention have also found that when the crystallinity of the polymer is lowered in order to prolong the usable time, or when a tackifying resin is blended, the heat resistance is significantly lowered.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1～7 and comparative example 1～3

[0093] With the composition shown in the following Table 1, each component was mixed at 180° C. using a mixing mixer (SV-1-1 double arm type kneader manufactured by Moriyama Seisakusho Co., Ltd.), thereby obtaining a hot-melt adhesive composition .

[0094] [Table 1]

[0095]

[0096] Unit: g

[0097] *1 VESTOPLAST (registered trademark) 888 (Evonic, ethylene-propylene-1-butene copolymer, melting point: 160°C, melt viscosity: 120000mPa·s (190°C), weight average molecular weight: 104000)

[0098] *2 VESTOPLAST (registered trademark) EP807 (Evonic, ethylene-propylene-1-butene copolymer, melting point: 161°C, melt viscosity: 7000mPa·s (190°C), weight average molecular weight: 60000)

[0099] *3 TAFMER (registered trademark) XM5080 (manufactured by Mitsui Chemicals, Inc., propylene-1-butene copolymer, melting point: 160°C, MFR: 4.0 g / 10min (230°C))

[0100] *4TAFMER (registered trademark) PN0040 (manufactured by Mitsui Chemicals, Inc., propylene-1-butene copolymer, melti...

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Abstract

The present invention provides a hot-melt adhesive that has a sufficiently long usable life and that exhibits superior strength and heat resistance. The present invention relates to a hot-melt adhesive composition that contains a hydrocarbon-based cyclic polymer, an alpha-olefin-based polymer, and a tackifying resin.

Description

technical field [0001] The present invention relates to a hot-melt adhesive composition containing hydrocarbon cyclic polymer, α-olefin polymer and tackifying resin. Background technique [0002] Currently, polyolefin resins such as polypropylene are mostly used for automobile parts and the like because they are excellent in processability and strength. As an adhesive used when bonding a member made of these polyolefin resins to an adherend, a hot-melt adhesive containing an α-olefin polymer and a tackifying resin is often used. [0003] Patent Document 1 proposes a hot melt adhesive composition comprising crystalline polybutene having a specific melt index, a hydrogenated tackifier resin, at least one non-hydrogenated tackifier resin, and a polypropylene wax . [0004] Patent Document 2 proposes a hot-melt adhesive composition that further contains a polymer having a specific α-olefin unit and a branched chain number per specific α-olefin unit, and optionally a tackifier,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/00C09J11/08C09J123/20
CPCC09J11/08C09J123/08C08L23/14C08L23/20C09J123/00C09J123/20C09J123/0815C09J123/12C09J145/00
Inventor 宇野淳之
Owner SUNSTAR GIKEN KK
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