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EVA material treatment-free bonding polyurethane adhesive and preparation method thereof

A polyurethane adhesive, treatment-free technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as affecting effect

Inactive Publication Date: 2021-11-26
中山市合力化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the current EVA treatment agent is basically incompatible with polyurethane adhesives, it will be separated after a short time after simple mixing, which will affect the effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]A. First add 190-200kg methylcyclohexane, 100-110kg methyl ethyl ketone, 50-52kg EVA resin into the reactor, turn on the machine and heat up and stir slowly;

[0033] B. Stir until the EVA resin is completely dissolved, heat up to 75-80°C, add 40-42kg of methyl methacrylate and 4.8-5kg of hydroxyethyl methacrylate at a constant temperature, and then add 0.6-0.8kg of dissolved initiator;

[0034] C. After stirring at constant temperature for 4-4.5 hours, stop heating and start cooling, and use it as the termination solution of polyurethane reaction for subsequent use;

[0035] D. Add 180-200kg methyl ethyl ketone and 80-100kg dimethyl carbonate to the polyurethane reactor, set the temperature to 80°C and start to heat up, and add 180kg polyester polyol when stirring at a slow speed when starting up;

[0036] E. After the polyol is completely dissolved and the temperature is constant, add 10-11kg HDI, stir evenly and then add a catalyst to make the reaction. When the chain...

Embodiment 2

[0039] A. First add 200-250kg methylcyclohexane, 90-100kg methyl ethyl ketone, 50-55kg EVA resin into the reaction kettle, turn on the machine and heat up and stir slowly;

[0040] B. Stir until the EVA resin is completely dissolved, heat up to 75-80°C, add 40-45kg of methyl methacrylate and 4-4.5kg of hydroxyethyl acrylate at a constant temperature, and then add 0.6-0.8kg of dissolved initiator;

[0041] C. After stirring at constant temperature for 4 hours, stop heating and start cooling, and use it as the termination solution of polyurethane reaction for subsequent use;

[0042] D. Add 200-220kg methyl ethyl ketone and 100-130kg dimethyl carbonate to the polyurethane reactor, set the temperature at 80-85°C and start to heat up, and add 180-200kg polyester polyol while stirring at a slow speed when starting the machine;

[0043] E. After the polyol is completely dissolved and the temperature is constant, add 10-12kg HDI, stir evenly and then add a catalyst to make the reacti...

Embodiment 3

[0046] A. First add 150-200kg methylcyclohexane, 90-100kg methyl ethyl ketone, 50-55kg EVA resin into the reactor, turn on the machine and heat up and stir slowly;

[0047] B. Stir until the EVA resin is completely dissolved, heat up to 75-80°C, add 40-45kg of methyl methacrylate and 4.5-5kg of hydroxyethyl methacrylate at a constant temperature, and then add 0.6-0.8kg of dissolved initiator;

[0048] C. After stirring at constant temperature for 4 hours, add terminator and continue stirring for 30 minutes, then add 100-130kg dimethyl carbonate, and add 180-220kg polyester polyester;

[0049] D. After the polyol is completely dissolved and the temperature is constant, add 11-13kg HDI, stir evenly and then add a catalyst to make the reaction. When the chain extension viscosity increases in the middle, add the remaining methyl ethyl ketone, ethyl acetate and dimethyl carbonate to dilute and then reaction;

[0050] F. When a specific reaction level is reached, add 2-3 kg of ethy...

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Abstract

The invention relates to an EVA material treatment-free bonding polyurethane adhesive and a preparation method thereof, and the raw materials used by the polyurethane adhesive comprise the following components: EVA resin, butanone, methyl methacrylate, hydroxyethyl methylacrylate, ethyl acetate, dimethyl carbonate, an initiator, polyester polyol, methyl cyclohexane, acetone and hexamethylene diisocyanate. The method provided by the invention overcomes the traditional method. For a material with a rough surface, EVA treatment liquid medicine is not used, the material can be kept stable without layering, and meanwhile, the non-environment-friendly requirement of no triphenyl can be met. According to the invention, the technical problem that the adhesive can be continuously produced in batches is solved, the system can be stable for a long time without layering, the performance is stable, and acidic substances influencing the skin do not need to be used, so that a shoe factory can safely and reliably complete the production process. Therefore, a pollution-free surface treating agent needs to be researched.

Description

technical field [0001] The invention relates to the technical field of chemistry and chemical engineering, in particular to an EVA material treatment-free bonding polyurethane adhesive and a preparation method thereof. Background technique [0002] At present, in the field of shoemaking technology, EVA materials must be treated with corresponding EVA treatment agents before they can be bonded before using polyurethane adhesives. The purpose of surface treatment is to clean the surface to be bonded and treat rough EVA materials. In order to achieve the predetermined bonding effect. [0003] EVA / IP / Model and other shoe materials are widely used in the production of sports shoes, casual shoes, sandals, slippers, etc. due to their light weight and good resilience. Due to various reasons such as equipment matching, personnel quality, quality requirements, cost control and other reasons in shoe-making factories, there are great differences in shoe-making technology. Some material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/63
CPCC09J175/06C08G18/638
Inventor 杨团结
Owner 中山市合力化工有限公司
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