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High-moisture-penetrability polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive, moisture permeability technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of water resistance, poor boiling resistance, etc. The effect of simplicity, materials and equipment readily available

Inactive Publication Date: 2020-04-24
VALENCE BONDING TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of high moisture permeability polyurethane hot melt adhesive and its preparation method for the problem of poor water resistance and water boiling resistance of existing powder coatings

Method used

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  • High-moisture-penetrability polyurethane hot melt adhesive and preparation method thereof
  • High-moisture-penetrability polyurethane hot melt adhesive and preparation method thereof
  • High-moisture-penetrability polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of preparation of high moisture permeability polyurethane hot melt adhesive:

[0047] Weigh 25 parts of polyester polyol, 50 parts of polyether polyol, 0.05 part of hindered phenolic antioxidant, 0.01 part of catalyst, and 24.94 parts of isocyanate according to the composition ratio; wherein, the polyester polyol is composed of adipic acid, carbonic acid , sebacic acid, dodecanedioic acid, terephthalic acid, isophthalic acid or phthalic acid with hexanediol, butanediol, hexanediol, diethylene glycol or new One or several kinds of amyl alcohol are polymerized, and its weight average molecular weight is 1000-5000;

[0048] Put the polyester polyol, polyether polyol and hindered phenolic antioxidant melted into a liquid into a closed reaction vessel, heat to 120°C, stir at 100 rpm for 10 min, mix well and evacuate to a negative pressure of 0.08 -0.1MPa, keep for 60min;

[0049] When the temperature of the above materials is lowered to 70-80°C, break the vacuum, qu...

Embodiment 2

[0051] A kind of preparation of high moisture permeability polyurethane hot melt adhesive:

[0052] Weigh 20 parts of polyester polyol, 55 parts of polyether polyol, 0.05 part of hindered phenolic antioxidant, 0.01 part of catalyst, and 24.94 parts of isocyanate according to the composition ratio; wherein, the polyester polyol is composed of adipic acid, carbonic acid , sebacic acid, dodecanedioic acid, terephthalic acid, isophthalic acid or phthalic acid with hexanediol, butanediol, hexanediol, diethylene glycol or new One or several kinds of amyl alcohol are polymerized, and its weight average molecular weight is 1000-5000;

[0053] Put the polyester polyol, polyether polyol and hindered phenolic antioxidant melted into a liquid into a closed reaction vessel, heat to 120°C, stir at 100 rpm for 10 min, mix well and evacuate to a negative pressure of 0.08 -0.1MPa, keep for 60min;

[0054]When the temperature of the above materials is lowered to 70-80°C, break the vacuum, qui...

Embodiment 3

[0056] A kind of preparation of high moisture permeability polyurethane hot melt adhesive:

[0057] Weigh 30 parts of polyester polyols, 45 parts of polyether polyols, 0.15 parts of hindered phenolic antioxidants, 0.05 parts of catalysts, and 28 parts of isocyanates according to the composition ratio; wherein, the polyester polyols are composed of adipic acid, carbonic acid , sebacic acid, dodecanedioic acid, terephthalic acid, isophthalic acid or phthalic acid with hexanediol, butanediol, hexanediol, diethylene glycol or new One or several kinds of amyl alcohol are polymerized, and its weight average molecular weight is 1000-5000;

[0058] Put the polyester polyol, polyether polyol and hindered phenolic antioxidant melted into a liquid into a closed reaction vessel, heat to 120°C, stir at 100 rpm for 10 min, mix well and evacuate to a negative pressure of 0.08 -0.1MPa, keep for 60min;

[0059] When the temperature of the above materials is lowered to 70-80°C, break the vacu...

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Abstract

The invention relates to a high-moisture-penetrability polyurethane hot melt adhesive and a preparation method thereof. The polyurethane hot melt adhesive is prepared from, by weight, 20 to 40 parts of polyester polyol, 30 to 60 parts of polyether polyol, 0.05 to 0.2 part of an antioxidant, 0.01 to 0.1 part of a catalyst and 10 to 30 parts of isocyanate. The high-moisture-penetrability polyurethane hot melt adhesive has high cohesiveness under the compounding action of the polyester polyol, the polyether polyol, the antioxidant, the catalyst and isocyanate, meanwhile, the moisture penetrability can reach 85% or above, and the high-moisture-penetrability polyurethane hot melt adhesive is free of solvent volatile matters, environment-friendly and pollution-free. Besides, the preparation method of the high-moisture-penetrability polyurethane hot melt adhesive is simple in preparation process, raw materials and equipment are easy to obtain, and large-scale production can be realized.

Description

technical field [0001] The invention relates to the field of hot melt adhesives, in particular to a polyurethane hot melt adhesive with high moisture permeability and a preparation method thereof. Background technique [0002] Hot melt adhesive is a kind of plastic adhesive. Its physical state changes with temperature within a certain temperature range, but its chemical properties remain unchanged. It is non-toxic and tasteless, and is an environmentally friendly chemical product. Because the product itself is solid, easy to pack, transport, store, solvent-free, non-polluting, and non-toxic; and it has the advantages of simple production process, high added value, strong bonding strength, and fast speed. In the field of functional composite fabrics, hot melt adhesives are often used as a binder to bond two fabrics, such as windproof and breathable functional fabrics, but with the improvement of people's living standards, people's demand for outdoor clothing is not only its w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C08G18/40C08G18/42C08G18/48
CPCC08G18/4018C08G18/42C08G18/48C09J175/04
Inventor 何万萍明俊江
Owner VALENCE BONDING TECH SHANGHAI CO LTD
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