Hot-melt adhesive for steel-plastic composite pipe

A steel-plastic composite pipe and hot-melt adhesive technology, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve the problems of hot-melt adhesive cracking and falling off at the interface, and low connection strength of hot-melt adhesives, and achieve improved Improved impact strength, ring stiffness, chemical resistance, and increased service life

Active Publication Date: 2011-09-21
河北金天塑胶新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with the publication number CN1323867A discloses a hot-melt adhesive modified by inorganic nanomaterials, which adds inorganic nanoparticles CaCO 3 、TiO 2 , talc or SiO 2 Increase the adsorption and lasting cohesion of the hot melt adhesive, make the aluminum pipe and polyethylene plastic effectively bonded, and obtain an aluminum-plastic pipe composite material with excellent performance; but if the above hot melt adhesive is applied to the steel-plastic pipe, there will be many problems. limitation
Due to the special working environment and use of steel-plastic pipes, there are higher requirements for the physical and mechanical properties, chemical resistance, aging resistanc

Method used

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  • Hot-melt adhesive for steel-plastic composite pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] At a temperature of 150°C~230°C, mix the adhesive resin masterbatch, polyolefin resin, tackifying resin and rare earth oxide according to the weight parts specified in Table 2 and Table 3, and then stir and mix at a high speed, then pass through the twin-screw Melt extrusion, and then according to the conventional process, the hot melt adhesive for steel-plastic composite pipe can be obtained through pelletizing, screening, and packaging processes.

[0031] The weight proportion of each component of table 2 embodiment 1-7

[0032]

[0033] Note: Butadiene rubber mentioned in Table 2 can be replaced by nitrile rubber or natural rubber.

[0034] The adhesive resin masterbatch is prepared according to the weight ratio in Table 3 according to the following steps: add the initiator and unsaturated polar monomer to the matrix resin, and extrude with parallel twin-screw at a temperature of 150-230°C , to obtain the adhesive resin masterbatch.

[0035] Table 3 Proportion o...

Embodiment 2~7

[0039] Repeat the method of Example 1 according to the contents of each component specified in Tables 2 to 3. The test results are listed in Table 4.

[0040] Table 4 The performance test results of the hot melt adhesives prepared in Examples 1 to 7

[0041]

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Abstract

The invention discloses a hot-melt adhesive for a steel-plastic composite pipe, which is prepared by blending and extruding the following components in percentage by weight by a parallel double screw extruder: 5-40% of binding resin master batch, 50-80% of polyolefin resin, 5-25% of tackifying resin and 0.02-5% of inorganic rare-earth oxide, wherein the binding resin is prepared by carrying out graft modification on polyethylene and/or ethylene copolymer, which is/are used as the matrix resin, and initiator (accounting for 0.01-0.2 wt% of the binding resin master batch) and unsaturated polar monomer (accounting for 0.1-5 wt% of the binding resin master batch); the polyolefin resin is used for adjusting the consumption of the binding resin master batch and the comprehensive properties of the hot-melt adhesive; and the tackifying resin is one or combination of SBS (styrene-butadiene-styrene), SEBS (styrene-ethylene-butadiene-styrene), SIS (styrene-isoprene-styrene), cis-1,4-polybutadiene rubber, nitrile-butadiene rubber and natural rubber. Since the rare-earth oxide is added, the grafting ratio of the binding resin master batch in the hot-melt adhesive is increased, thereby obviously enhancing the initial viscosity, enduring viscosity, binding strength and other properties.

Description

technical field [0001] The invention relates to a copolymer adhesive, specifically a hot-melt adhesive, especially a hot-melt adhesive for steel-plastic pipes. Background technique [0002] Steel-plastic composite pipe is a new type of pipe that has developed rapidly in recent years. It is based on steel pipe, steel strip or steel skeleton, and is compounded with various types of plastics (such as polypropylene, polyethylene, polyvinyl chloride, nylon, etc.). made. It takes advantage of the rigidity of metal and the chemical corrosion resistance of plastic, as well as the smooth inner wall of plastic pipes, less fouling, and small fluid resistance. Therefore, steel-plastic composite pipes have been widely used in industrial and agricultural production, daily life and urban construction. [0003] The steel-plastic composite pipe is composed of five layers, and its composition from inside to outside is: polyethylene / hot melt adhesive / steel pipe or steel strip / hot melt adhesi...

Claims

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Application Information

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IPC IPC(8): C09J123/06C09J123/08C09J151/06C09J153/02C09J109/00C09J109/02C09J107/00C09J11/04
Inventor 赵兰敏汪贤华孙贇徐娟
Owner 河北金天塑胶新材料有限公司
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