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Reactive polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive, reactive technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of long open time and curing time, low production efficiency of production equipment, etc. Effects of open time, improved heat resistance, and improved curing speed

Inactive Publication Date: 2021-06-18
东莞聚力创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the opening time and curing time of polyurethane hot melt adhesives are relatively long, so that the assembly line production equipment in the automobile, textile and other industries needs to reduce the speed to adapt to the opening time and curing time of reactive polyurethane hot melt adhesives, so that the production equipment reduced production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A reactive polyurethane hot melt adhesive, using the following method:

[0041] (1) ingredient: According to weight, the polypropylene polyphenylene poly isocyanate 30 kg, 400 g / mol of polypropylene glycol 10 kg, 25 kg of acrylate, polyvinyl alcohol 10 kg, water 35 kg;

[0042] (2) The polyvinyl alcohol, acrylate, and water were stirred for 10 min, and the stirring velocity was 80 rpm to prepare a modified acrylate;

[0043] (3) A polyol solution, the modified acrylate is blended, and in a state where the temperature is 100 degrees Celsius and the absolute vacuum is 0.080 MPa, the water 1.5H, stop heating, and produces mixed liquid A;

[0044] (4) The multi-methylene polyphenylene poly isocyanate was added to the mixed liquid A, stirred, and the solution temperature was controlled at 70 degrees Celsius, and the reaction time was 0.5 h to obtain a reactive polyurethane hot melt glue.

Embodiment 2

[0046] A reactive polyurethane hot melt adhesive, using the following method:

[0047] (1) ingredient: According to weight, the polyethylene polyphenylene polysocyanate 37kg, 500 g / mol of polyhexide glycol 12kg, 32 kg, polyvinyl alcohol, 45 kg of water 45 kg;

[0048](2) The polyvinyl alcohol, acrylate, and water were stirred for 20 min, and the stirring speed was 90 rpm, and the modified acrylate was obtained.

[0049] (3) A polyol solution, the modified acrylate is blended, and in a state where the temperature is 100-150 degrees Celsius and the absolute vacuum is 0.010 MPa, the water removal 2.25h, stop heating, and produces mixed liquid A;

[0050] (4) A multi-methylene polyphenyl poly isocyanate is added to the mixed liquid A, stirred, and the solution temperature is controlled at 85 degrees Celsius, and the reaction time is 1.25 h to obtain a reactive polyurethane hot melt glue.

Embodiment 3

[0052] A reactive polyurethane hot melt adhesive, using the following method:

[0053] (1) ingredients: Polypropylene glycol 3.75 kg, 400 g / mol of polypropylene glycol, 3.75 kg, 500 g / mol of polypropylene glycol 11.25, 400 g / mol of polypropylene glycol, acrylate, 40 kg, polymer Vinyl alcohol 25kg, water 55kg;

[0054] (2) The polyvinyl alcohol, acrylate, and water were stirred for 30 min, and the stirring speed was 100 rpm, and the modified acrylate was obtained.

[0055] (3) A polyol solution, the modified acrylate is blended, and in a state where the temperature is 150 degrees Celsius and the absolute vacuum is 0.12 MPa, the water is 3 h, stop heating, and produces a mixed liquid A;

[0056] (4) A multi-methylene polyphenylene poly isocyanate was added to the mixed liquid A, stirred, and the solution temperature was controlled at 100 degrees Celsius, the reaction time was 2 h, resulting in a reaction type polyurethane hot melt glue.

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PUM

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Abstract

The invention relates to the field of hot melt adhesives, and particularly discloses a reactive polyurethane hot melt adhesive and a preparation method thereof. The reactive polyurethane hot melt adhesive comprises polymethylene polyphenyl polyisocyanate, a polyol solution and modified acrylate, wherein the modified acrylate is prepared from the following components: acrylate, polyvinyl alcohol and water. The preparation method comprises the following steps of blending a polyol solution and modified acrylate, removing water at the temperature of 100-150 DEG C in a vacuum state, stopping heating to obtain a mixed solution A, then adding polymethylene polyphenyl polyisocyanate into the mixed solution A, stirring, controlling the temperature of the solution at 70-100 DEG C, and reacting for 0.5-2 hours. The polyurethane hot melt adhesive disclosed by the invention has the effects of shortening the opening time and curing time of the hot melt adhesive and enhancing the degradability of the hot melt adhesive.

Description

Technical field [0001] The present application relates to the technical field of hot melt adhesive, and more particularly to a reaction type polyurethane heat melt glue and a preparation method thereof. Background technique [0002] The reaction type polyurethane heat melt adhesive (PUR) has the characteristics of high thermal melt adhesive, fast positioning speed, etc., and has the characteristics of water resistance, chemical resistance, and creep resistance of reactive adhesive, but also has simple operation. Excellent performance, environmentally friendly, so reactive polyurethane hot melt adhesive is widely used in automotive industry, shoes industry, textile industry, wood industry, electronics industry, white appliances, books and food packaging and other industries. [0003] At present, the open time and curing time of polyurethane heat melt are longer, so that the production equipment of the car, textile and other industries need to reduce the speed to accommodate the op...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J175/06C09J175/04C08G18/63C08G18/48C08G18/42
CPCC09J175/08C09J175/06C09J175/04C08G18/4825C08G18/4277C08G18/4018C08G18/633C08G18/4072C08G2170/20
Inventor 陈伟民缪益新黄东波
Owner 东莞聚力创新材料科技有限公司
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