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Reactive polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive, reactive technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as poor high temperature resistance, strength attenuation, and oleic acid resistance, and achieve stable viscosity Good performance, small attenuation of bonding strength, and low cost

Pending Publication Date: 2022-01-28
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a reactive polyurethane hot-melt adhesive to solve the technical problems of the existing reactive polyurethane hot-melt adhesives, such as poor high-temperature resistance, large attenuation of strength under high-temperature environments, and resistance to oleic acid and sebum.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh Dynacoll 7360 90g, Stepan polyester polyol PD-56 40g, Asahikawa chemical polyester polyol FLP2000N 40g, polycarbonate G3452 10g, pentaerythritol 1g, antioxidant 1010 0.5g, PPG2000 60g in the reaction kettle, Dehydration under reduced pressure at 140°C for 2 hours, then lower the temperature to 100°C, add 58g of MDI, raise the temperature to 120°C and continue the reaction for 45 minutes, then add 1g of mercaptopropyltrimethoxysilane, 0.6g of catalyst DMDEE, and continue the reaction for 45 minutes. Then nitrogen breaks the vacuum, fills it into a specific sealed container while it is hot, and waits for the test.

Embodiment 2

[0031] Weigh Dynacoll 7360 90g, Stepan polyester polyol PD-56 40g, Asahikawa chemical polyester polyol FLP2000N 40g, polycarbonate G3452 10g, pentaerythritol 1g, antioxidant 1010 0.5g, PPG2000 60g in the reaction kettle, Dehydration under reduced pressure at 140°C for 2 hours, then lower the temperature to 100°C, add 58g of MDI, raise the temperature to 120°C and continue the reaction for 45 minutes, then add 1g of Y-9669, 0.6g of catalyst DMDEE, and continue the reaction for 45 minutes. Then nitrogen breaks the vacuum, fills it into a specific sealed container while it is hot, and waits for the test.

Embodiment 3

[0033] Weigh Dynacoll 7360 90g, Stepan polyester polyol PD-56 40g, Asahikawa chemical polyester polyol FLP2000N 40g, polycarbonate G3452 10g, pentaerythritol 2g, antioxidant 1010 0.5g, PPG2000 60g in the reaction kettle, Dehydration under reduced pressure at 140°C for 2 hours, then lower the temperature to 100°C, add 64g of MDI, raise the temperature to 120°C and continue the reaction for 45 minutes, then add 1g of Y-9669, 0.6g of catalyst DMDEE, and continue the reaction for 45 minutes. Then nitrogen breaks the vacuum, fills it into a specific sealed container while it is hot, and waits for the test.

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PUM

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Abstract

The invention discloses a reactive polyurethane hot melt adhesive, which comprises the following components: 10-40% of polyester polyol, 10-30% of polyether polyol, 0.5-8% of polycarbonate polyol, 1-10% of micromolecule polyol, 0-10% of petroleum resin, 10-30% of isocyanate, 0.1-1% of a silane coupling agent, 0-1% of an auxiliary agent and 0.1-0.5% of a catalyst. The invention also provides a preparation method of the reactive polyurethane hot melt adhesive. The reactive polyurethane hot melt adhesive which is good in high-temperature resistance and small in strength attenuation in a high-temperature environment can be prepared, and is resistant to oleic acid etching.

Description

technical field [0001] The invention relates to the technical field of hot melt adhesives, in particular to a reactive polyurethane hot melt adhesive and a preparation method thereof. Background technique [0002] Reactive polyurethane hot melt (PUR) is solid at room temperature, but it melts under heating, and it is coated in a liquid or fluid state, and it is in contact with the second bonding substrate before cooling, so that it can form after cooling. The solid glue with adhesive strength can further react with moisture in the air to carry out curing crosslinking reaction, so as to obtain higher final adhesive strength. Because of its low odor, low volatility, high strength, high reliability, fast positioning and bonding, etc., it is more and more widely used in electronics, textiles, clothing, woodworking, automobiles, shoemaking and other industries. [0003] However, the existing reactive polyurethane hot-melt adhesive has poor high temperature resistance, and the us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C08G18/76C08G18/66C08G18/42C08G18/44C08G18/48
CPCC09J175/04C08G18/7671C08G18/42C08G18/44C08G18/4825C08G18/4854C08G18/4018C08G18/6674C08G18/6677
Inventor 辛帅王建斌陈田安
Owner YANTAI DARBOND TECH
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