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Elastomer-based hot-melt adhesive and preparation method thereof

A hot-melt adhesive and elastomer technology, applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve problems such as inapplicability, and achieve good product toughness, mature and stable technology, and bond strength high effect

Inactive Publication Date: 2013-08-07
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patents are all for bonding systems with relatively fixed bonding positions, which are not suitable for occasions that require repeated bending. This patent aims to develop a hot melt adhesive system suitable for occasions such as repeated bending. At the same time, the system is also suitable for the bonding between metal, glass and plastics where there is no bending

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] step one

[0021] Put 98.1% ethylene-octene copolymer (POE), 1% maleic anhydride (MAH), 0.4% styrene (St) and 0.5% dicumyl peroxide (DCP) into the high-speed disperser Mix well and stir for 7 minutes, so that maleic anhydride (MAH), 0.4% styrene (St) and 0.5% dicumyl peroxide (DCP) are coated on ethylene-octene copolymer (POE) After being surfaced, they are added into a twin-screw extruder for melt grafting to prepare a graft-modified elastomer with a grafting rate of 0.85%.

[0022] step two

[0023] The above 20% graft-modified elastomer, 65% ethylene-octene copolymer (POE), 5% linear low-density polyethylene, 5% high-density polyethylene, 4.9% C5 / 9 petroleum The resin and 0.1% antioxidant are put into a high-speed disperser, mixed evenly and stirred for 7 minutes, and then they are put into a twin-screw extruder for melt extrusion, the hot melt adhesive of the present invention. The bonding strength of the hot melt adhesive of the present invention to PE / Al is 180...

Embodiment 2

[0031] step one

[0032] Mix 95% ethylene-propylene copolymer (EP), 3.5% maleic anhydride (MAH), 1.5% styrene (St) and 1% benzoyl peroxide (BPO) in a high-speed disperser Uniform and stir for 5 minutes, make maleic anhydride (MAH), styrene (St) and benzoyl peroxide (BPO) coated on the surface of ethylene-propylene copolymer (EP), and then put them into the twin-screw The extruder carried out melt grafting to prepare a graft-modified elastomer with a grafting rate of 1.05%;

[0033] step two

[0034] Put 40% graft-modified elastomer, 30% ethylene-propylene copolymer (EP), 5% linear low-density polyethylene, 24.1% rosin resin and 0.1% antioxidant into a high-speed disperser and mix Uniformly and stirred for 5 minutes, then put them into a twin-screw extruder for melt extrusion to obtain the hot melt adhesive of the present invention, the bonding strength of the present invention to PE / Al is 200N / 25mm.

[0035] In this embodiment, the antioxidant is 1010 antioxidant or 168 ant...

Embodiment 3

[0041] step one

[0042] 97% ethylene-propylene terpolymer (EPDM), 2.9% maleic anhydride (MAH), 0.5% styrene (St) and 0.6% benzoyl peroxide (BPO) and diisopropyl peroxide Put the mixture of benzene (DCP) into a high-speed disperser, mix well and stir for 10 minutes, mix maleic anhydride (MAH), styrene (St) and benzoyl peroxide (BPO) with dicumyl peroxide (DCP ) mixture coated on the surface of ethylene-propylene terpolymer (EPDM), and then put them into a twin-screw extruder for melt grafting to prepare a graft-modified elastomer with a graft ratio of 1.00 %;

[0043] step two

[0044] The above 20% graft modified elastomer, 70% ethylene-propylene terpolymer (EPDM), 5% The high-density polyethylene, 4% terpene resin and 1% antioxidant are put into a high-speed disperser and mixed uniformly and stirred for 10 minutes, and then they are put into a twin-screw extruder for melt extrusion to obtain the present invention Hot melt adhesive, the bonding strength of the present inv...

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Abstract

The invention relates to an elastomer-based hot-melt adhesive and a preparation method thereof. The hot-melt adhesive is characterized in comprising 5-40% of a grafted modified elastomer, 30-70% of an elastomer, 0-20% of polyolefin, 0-20% of tackifying resin, 0-2% of co-graft monomer, and 0-1% of an antioxidant. The grafted modified elastomer comprises 95-99% of an elastomer, 0.5-5.0% of a polar monomer, 0.1-1.5% of comonomer, and 0.1-2% of an initiator. The method has the advantages of mature and stable reactive extrusion process, good product toughness, high bonding strength, and good wettability upon substrate.

Description

technical field [0001] The invention relates to the technical field of hot-melt adhesives, in particular to a high-toughness elastic body-based hot-melt adhesive that can be bent multiple times for bonding between metal and plastic, glass and plastic, and metal and glass and its preparation method. Background technique [0002] Polymer materials are widely used in real life, and the bonding application between metal, glass and other substrates and plastics is becoming more and more extensive, especially the bonding between metal sheets and plastic sheets, which is widely used in electronics, construction, Machinery and other industries. Adhesives are indispensable where plastic is bonded to metal; for example, in aluminum-plastic composite pipes, a layer of hot-melt adhesive is required between the plastic and the aluminum to form a strong composite pipe. The Chinese patent application document whose publication number is CN1167802A mentions an adhesive obtained by diluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/16C09J123/08C09J151/06C09J123/06C09J123/12C09J157/02C09J193/04C09J145/00C08F255/02C08F255/04
Inventor 冯才敏
Owner SHUNDE POLYTECHNIC
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