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Low-temperature hot melt adhesive and preparation method thereof

A low-temperature heat-melting technology, used in adhesives, mechanical equipment, adhesive types, etc., can solve problems such as failure to meet the requirements of pipeline anti-corrosion, embrittlement temperature higher than -10 °C, and decreased bonding performance. Good peel strength and workability, good reactivity, low embrittlement temperature effect

Active Publication Date: 2012-01-18
成都长江热缩材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesive performance of EVA resin decreases rapidly at low temperature (below -10°C), and its embrittlement temperature is higher than -10°C according to the standard test of GB / T23257-2009 "Buried Steel Pipeline Polyethylene Anticorrosion Coating" , does not meet the requirements of the standard below -15 ℃
Loss of stability at high temperature (60°C and above), making it unable to meet the requirements of pipeline anticorrosion in high temperature and low temperature environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Component ratio (percentage by weight) of low temperature hot melt adhesive:

[0034] Ethylene octene copolymer elastomer 35;

[0035] Ethylene-butyl or methyl acrylate copolymer 14;

[0036] Terpene phenolic resin 35;

[0037] Ethylene-acrylate-maleic anhydride copolymer 15;

[0038] Antioxidant 1.

[0039] Among them, the melt index of ethylene octene copolymer elastomer is 13g / 10min, the melting point is 56°C, and the glass transition temperature is -55°C; the Vicat softening point of ethylene-butyl acrylate or methyl ester copolymer is less than 40°C, The melt index is 35~45g / 10min; the Vicat softening point of ethylene-acrylate-maleic anhydride copolymer is 66°C; the ring-and-ball softening point of terpene phenol resin is 90~100°C.

[0040] Preparation: According to the above ratio, first take ethylene octene copolymer elastomer, ethylene-butyl or methyl acrylate copolymer, terpene phenol resin, and antioxidant materials and add them to the kneader. When t...

Embodiment 2

[0042] Component ratio (percentage by weight) of low temperature hot melt adhesive:

[0043] Ethylene octene copolymer elastomer 25;

[0044] Ethylene-butyl or methyl acrylate copolymer 24;

[0045] Terpene phenolic resin 35;

[0046] Ethylene-acrylate-maleic anhydride copolymer 15;

[0047] Antioxidant 1.

[0048] Among them, the melt index of ethylene octene copolymer elastomer is 13g / 10min, the melting point is 56°C, and the glass transition temperature is -55°C; the Vicat softening point of ethylene-butyl acrylate or methyl ester copolymer is less than 40°C, The melt index is 35~45g / 10min; the Vicat softening point of ethylene-acrylate-maleic anhydride copolymer is 66°C; the ring-and-ball softening point of terpene phenol resin is 90~100°C.

[0049] Preparation: According to the above ratio, first take ethylene octene copolymer elastomer, ethylene-butyl or methyl acrylate copolymer, terpene phenol resin, and antioxidant materials and add them to the kneader. When t...

Embodiment 3

[0051] Component ratio (percentage by weight) of low temperature hot melt adhesive:

[0052] Ethylene octene copolymer elastomer 15;

[0053] Ethylene-butyl or methyl acrylate copolymer 34;

[0054] Terpene phenolic resin 35;

[0055] Ethylene-acrylate-maleic anhydride copolymer 15;

[0056] Antioxidant 1.

[0057] Among them, the melt index of ethylene octene copolymer elastomer is 13g / 10min, the melting point is 56°C, and the glass transition temperature is -55°C; the Vicat softening point of ethylene-butyl acrylate or methyl ester copolymer is less than 40°C, The melt index is 35~45g / 10min; the Vicat softening point of ethylene-acrylate-maleic anhydride copolymer is 66°C; the ring-and-ball softening point of terpene phenol resin is 90~100°C.

[0058] Preparation: According to the above ratio, first take ethylene octene copolymer elastomer, ethylene-butyl or methyl acrylate copolymer, terpene phenol resin, and antioxidant materials and add them to the kneader. When the...

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Abstract

The invention discloses a low-temperature hot melt adhesive and a preparation method thereof, and the low-temperature hot melt adhesive comprises the following components by weight: 28-70 parts of matrix resins, 20-46 parts of tackifying resins, 10-25 parts of maleic anhydride graft copolymers, 0.5-2 parts of anti-oxidants; the matrix resin comprises 20-50 parts by weight of ethylene-octene copolymer elastomers, and 50-80 parts by weight of ethylene-butyl acrylate copolymers. By using a mixing method, the raw materials are mixed in a kneader. The low-temperature hot melt adhesive obtained by the formula and the method of the invention has a low brittle temperature, good bonding performance, good sealing performance, stable performance, a simple process, and low cost, is applicable to the field of metal pipeline repaired mouth anticorrosion, and has very good economic benefit and industrial production prospects.

Description

technical field [0001] The invention belongs to the technical field of hot-melt adhesives, and in particular relates to a low-temperature hot-melt adhesive and a preparation method thereof. Background technique [0002] Hot-melt adhesives are known as "green" adhesives because they are solvent-free, pollution-free, fast curing, and good process performance. They have been widely used in the field of pipeline joint anticorrosion in recent years. With the continuous improvement of technical requirements, not only hot-melt adhesives are required to have good bonding performance, but also high reliability and good on-site construction performance in low-temperature environments are required. [0003] Traditional pipeline anti-corrosion hot-melt adhesives are often prepared using ethylene-vinyl acetate copolymer (EVA resin) as a base material. EVA resin is often used as a base material for hot-melt adhesives because of its excellent bonding performance and suitable fluidity at ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J145/00C09J193/04C09J157/02C09J151/00C09J151/06F16L58/18
Inventor 穆宏荣王军
Owner 成都长江热缩材料有限公司
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