A kind of magnetic hot melt adhesive and its preparation and use method

A magnetocaloric and melt-adhesive technology, applied in the direction of bonding methods, adhesives, adhesive additives, etc., can solve the problems of impossible heating separation, environmental pollution, etc., to avoid the generation of temperature gradient, easy to operate, improve bonding strength and The effect of heat resistance

Inactive Publication Date: 2017-06-06
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent dissolution method can cause environmental pollution, and heating separation is not allowed or even impossible in many occasions, such as civil engineering, etc.

Method used

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  • A kind of magnetic hot melt adhesive and its preparation and use method
  • A kind of magnetic hot melt adhesive and its preparation and use method
  • A kind of magnetic hot melt adhesive and its preparation and use method

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preparation example Construction

[0037] The preparation method of nickel-zinc, manganese-zinc and cobalt-zinc ferrite: adding iron acetylacetonate, zinc acetylacetonate and nickel acetylacetonate or manganese acetylacetonate or cobalt acetylacetonate with a molar ratio of 4:1:1 to ethylene glycol , heated in an Ar protective atmosphere, kept at 80-90°C for 10-30 minutes; then slowly raised to 170-200°C and held for 2-5 minutes, then rapidly raised to 255-265°C, refluxed for 50-90 minutes, and finally cooled to room temperature naturally Add absolute ethanol to the reaction solution to obtain a black reaction solution; centrifuge the solution, wash the precipitate repeatedly with absolute ethanol for 3 to 5 times, and finally vacuum-dry the washed black precipitate to obtain Ni 0.5 Zn 0.5 Fe 2 o 4 , Mn 0.5 Zn 0.5 Fe 2 o 4 or Co 0.5 Zn 0.5 Fe 2 o 4 Nano ferrite powder.

[0038] The method for surface modification of magnetic nano-ferrite powder is as follows: Weighing an appropriate amount of nano-po...

Embodiment 1

[0040] 25 kg of EVA, 22.5 kg of rosin, 4.5 kg of polybutadiene, 5 kg of Sasol synthetic wax, 0.5 kg of antioxidant 1010, and surface-modified magnetic manganese zinc ferrite nano 8 kilograms of powder; the softening point of the Sasol synthetic wax is between 110° C. and 120° C.; the plasticizer is low-molecular polybutadiene with a molecular weight of 2300.

[0041] Put rosin, antioxidant 1010, and Sasol synthetic wax into the container according to the formula dosage, and heat it to above 60°C, stir evenly to melt the above mixture; after the materials are completely melted, add the formula amount of EVA and polybutane ene, stir evenly at 150-180°C; after complete melting and mixing, add the surface-modified magnetic manganese-zinc-ferrite nano-powder in the formula amount, and stir evenly; stop heating the mixed molten material to make the temperature Lower to no higher than 130°C, then filter the above molten material through a 200-mesh filter; take the filtered molten mat...

Embodiment 2

[0046] 52 kg of EEA, 41.2 kg of coumarone resin, 3.6 kg of dibutyl phthalate, 11 kg of microcrystalline wax, 1.2 kg of thiodipropionate, and surface-modified 20 kg of magnetic nickel-zinc ferrite nanopowder; the softening point of the microcrystalline wax is between 60°C and 90°C.

[0047] Put the coumarone resin, thiodipropionate, and microcrystalline wax into the container according to the amount of the formula, and heat it to above 60°C, stir evenly to melt the above mixture; after the materials are completely melted, add the amount of the formula respectively EEA, dibutyl phthalate, stir evenly at 150-180°C; after complete melting and mixing, add the surface-modified magnetic nickel-zinc ferrite nano-powder in the formulated amount, and stir evenly; mix the Stop heating the molten material to lower its temperature to no higher than 130°C, and then filter the above molten material through a 300-mesh filter; take the filtered molten material and place it in an extruder, and ...

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Abstract

The invention provides a magnetic hot melt adhesive and a preparing and using method of the magnetic hot melt adhesive, and belongs to the field of adhesives. The magnetic hot melt adhesive and the preparing and using method of the magnetic hot melt adhesive aim to solve the problem that no magnetic nano powder exists in the prior art to promote hot melt adhesive melting. The magnetic hot melt adhesive comprises, by weight, 10-60 parts of thermoplastic polymers, 25-55 parts of tackifier, 2-20 parts of plasticizers, 3-15 parts of viscosity modifiers, 0.1-4.5 parts of antioxidants, and 5-30 parts of magnetic ferrite powder. According to the magnetic hot melt adhesive, the nano magnetic ferrite powder with the thermomagnetic characteristic is evenly scattered in hot melt adhesive, heat generated by nano magnetic ferrite particles in an alternating magnetic field fast extends to the periphery in a radial shape to promote adjacent hot melt adhesive molecules to be quickly heated and quickly bonded in a few seconds, and accordingly the magnetic hot melt adhesive has the advantages of being uniform in coating and high in adhesive strength. When the magnetic hot melt adhesive is used, heating equipment does not need to be arranged, melt adhesive does not need to be preheated, only a small alternating magnetic field generator is needed, operation is easy and convenient, and the magnetic hot melt adhesive is suitable for continuous and automatic high-speed work. The cured hot melt adhesive can be easily separated by being arranged and heated in the alternating magnetic field again.

Description

technical field [0001] The invention belongs to the field of adhesives, and in particular relates to a magnetothermal melt adhesive and a preparation and use method thereof. Background technique [0002] Hot melt adhesives have the advantages of fast curing, no pollution, and convenient preparation, and are widely used in mechanized packaging, furniture making, shoemaking, automobiles, perfect binding, electronic components and daily necessities bonding. At present, hot melt adhesives with fillers occupy the vast majority of the market due to their low price, but due to their long melting time and high viscosity after melting, they have poor wettability and are difficult to coat evenly, so they are not suitable for large areas. Coating and bonding, and the heat resistance of hot melt adhesive is not high, so it can only be used for products with low process requirements. Although there are many studies on the effect of adding fillers on the properties of hot melt adhesives ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J9/00C09J11/04C09J5/00
Inventor 赵海涛李成吾刘瑞萍王俏马瑞廷徐淑姣
Owner SHENYANG LIGONG UNIV
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