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Pipeline hot melt adhesive and preparation method thereof

A technology of hot melt adhesives and pipes, applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve the problems that cannot meet the requirements of pipeline anticorrosion, have many other components, lose stability, etc., and achieve The effect of excellent thermal stability, good market prospect and good reactivity

Inactive Publication Date: 2015-11-25
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

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
[0005] The application publication number is CN101818035A, and the application publication date is September 1, 2010. The Chinese invention patent application discloses a hot-melt adhesive for quick jointing of metal pipes and its preparation method. In this application, styrene-isoamyl Diene-styrene block copolymer (SIS) and styrene-butadiene-styrene block copolymer (SBS) are designed as matrix materials. The hot melt adhesive published in this application has better corrosion resistance, but other components There are many parts, and the base material must be oil-filled, and the processing is complicated

Method used

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  • Pipeline hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A composition ratio (percentage by weight) of hot melt adhesive for pipelines:

[0038] Matrix resin 64%;

[0039] Terpene phenolic resin 20%;

[0040] Ethylene-acrylate-maleic anhydride copolymer 15%;

[0041] Antioxidant 1%;

[0042] In the matrix resin, styrene-butadiene-styrene block copolymer accounts for 20% (weight percent) and ethylene-vinyl acetate copolymer accounts for 80% (weight percent)

[0043] Among them, the S / B ratio in styrene-butadiene-styrene block copolymer is 30 / 70; ethylene-vinyl acetate copolymer (EVA) (VA content 28%, melt index 25~150g / 10min) ; Ethylene - acrylate - maleic anhydride copolymer, Vicat softening point of 66 ° C; terpene phenol resin, ring and ball softening point of 100 ° C.

[0044] Preparation method: According to the above ratio, first mix styrene-butadiene-styrene block copolymer, ethylene-vinyl acetate copolymer and antioxidant: 0.5%, and mix them evenly, and granulate them through a twin-screw extruder. The prepared pa...

Embodiment 2

[0046] Component ratio (percentage by weight) of pipeline hot melt adhesive:

[0047] Matrix resin 49%

[0048] Terpene resin 35%;

[0049] Ethylene-acrylate-maleic anhydride copolymer 15%;

[0050] Antioxidant 1%.

[0051] In the matrix resin, styrene-butadiene-styrene block copolymer accounts for 10% (weight percent) and ethylene-vinyl acetate copolymer accounts for 90% (weight percent)

[0052] Among them, the S / B ratio in styrene-butadiene-styrene block copolymer is 40 / 60; ethylene-vinyl acetate copolymer (EVA) (VA content 30%, melt index 400g / 10min); ethylene -Acrylic ester-maleic anhydride copolymer, the Vicat softening point is 60°C; terpene resin, the Ring and Ball softening point is 90°C.

[0053] Preparation method: According to the above ratio, first mix styrene-butadiene-styrene block copolymer, ethylene-vinyl acetate copolymer and antioxidant: 0.2% evenly, and granulate through a twin-screw extruder. Particles, terpene resin and antioxidant: add 1% into the k...

Embodiment 3

[0055] Component ratio (percentage by weight) of pipeline hot melt adhesive:

[0056] Base resin 42%

[0057] Rosin resin 46%;

[0058] Ethylene-acrylate-maleic anhydride copolymer 10%;

[0059] Antioxidant 2%.

[0060] In the matrix resin, styrene-butadiene-styrene block copolymer accounts for 30% (weight percent) and ethylene-vinyl acetate copolymer accounts for 70% (weight percent)

[0061] Among them, the S / B ratio in styrene-butadiene-styrene block copolymer is 20 / 80; ethylene-vinyl acetate copolymer (EVA) (VA content 30%, melt index 10g / 10min); ethylene -Acrylic ester-maleic anhydride copolymer, the Vicat softening point is 35°C; rosin resin, the Ring and Ball softening point is 90~100°C.

[0062] Preparation method: According to the above ratio, first mix styrene-butadiene-styrene block copolymer, ethylene-vinyl acetate copolymer and antioxidant: 1% evenly, and granulate through a twin-screw extruder. Obtained particle and rosin resin, antioxidant: 1% is added into k...

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Abstract

The present invention discloses a pipeline hot melt adhesive and a preparation method thereof. The pipeline hot melt adhesive comprises the following components by weight: 20%-46% of a tackifying resin, 10%-25% of a maleic anhydride graft copolymer, 0.5%-2% of an antioxidant and 28%-65% of base resin, wherein the base resin comprises 10%-40% of a styrene-butadiene-styrene block copolymer and 60%-90% of an ethylene-vinyl acetate copolymer. The hot melt adhesive is prepared in two steps: 1, mixing styrene-butadiene-styrene block copolymer with ethylene-vinyl acetate copolymer, and pelletizing by a twin-screw extruder; and 2, mixing the raw materials in a kneader by using a mixing method. The invention has the advantages of simple formula, method and technology and low cost. The obtained hot melt adhesive has stable performance and good bonding performance, can be applied to metal pipeline anticorrosion repair, and has 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 pipeline anti-corrosion 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. Now the pipeline anticorrosion is composed of epoxy primer-hot melt adhesive-polyethylene three-layer anticorrosion, which is three-layer PE anticorrosion. In the three-layer PE anticorrosion technology, whether the purpose of pipeline anticorrosion can be achieved depends on whether the bonding strength of the hot melt adhesive to the epoxy primer and polyethylene can meet the standard. [0003] Traditional pipeline anti-corrosion hot-melt adhesives are often prepared using ethylene-vinyl acetate copolymer (EVA) as a base ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J153/02C09J151/00C09J145/00
Inventor 穆宏荣徐波王军
Owner 成都长江热缩材料有限公司
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