Hot melt polyurethane adhesive for water-repellent fabric lamination and preparation method thereof

A hot-melt polyurethane and water-repellent technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of low surface energy, achieve low viscosity, low operating temperature, and good glass transition temperature. Effect

Active Publication Date: 2019-03-29
佛山市顺德区蓝德堡实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a very low

Method used

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  • Hot melt polyurethane adhesive for water-repellent fabric lamination and preparation method thereof
  • Hot melt polyurethane adhesive for water-repellent fabric lamination and preparation method thereof
  • Hot melt polyurethane adhesive for water-repellent fabric lamination and preparation method thereof

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preparation example Construction

[0038] In addition, the present invention also provides a kind of preparation method of described hot-melt polyurethane adhesive, comprises the following steps:

[0039] 1) Put silicon-containing polyol, fluorocarbon-containing polyol and dimer acid in a molar ratio of 1:1.05 (adjustable according to demand), place them in a reaction kettle, heat to 210-240°C under nitrogen protection, and dehydrate for 16 - About 18 hours until the acid value is less than 0.6; during the reaction, nitrogen protection and high vacuum are used to dehydrate quickly. After the reaction is completed, the material is discharged in a molten state for use, and the state of the product is a highly viscous liquid (or a lower melting point. solid), its molecular weight of polymer among the present invention is between 3000-4500, is called for short AFS-X;

[0040] 2) Add AFS-X, polycaprolactone, wetting agent and antioxidant prepared in step 1) into the reactor, heat and dissolve to a uniform state, the...

Embodiment 1

[0042] A preparation method of hot-melt polyurethane adhesive, comprising the following steps:

[0043] 1) Put silicon-containing polyol, fluorocarbon-containing polyol and dimer acid in a molar ratio of 1:1.05 (adjustable according to requirements), place them in a reaction kettle, heat to 210°C under nitrogen protection, and dehydrate for about 18 hours Until the acid value is less than 0.6; during the reaction, nitrogen protection is utilized and a high vacuum is used so as to dehydrate quickly. After the reaction is completed, it is discharged in a molten state for use, and the state of the product is a highly viscous liquid (or a solid with a lower melting point). The molecular weight of the polymer in the present invention is between 3000-4500, referred to as AFS-X;

[0044] 2) Add AFS-X, polycaprolactone, wetting agent and antioxidant prepared in step 1) into the reactor, heat and dissolve to a uniform state, then vacuum dehydrate for 45min, add diisocyanate at 80°C to ...

Embodiment 3

[0055] Comparative Examples.

[0056] The preparation method of the hot-melt polyurethane adhesive comprises the following steps: adding common polyether, polycaprolactone, wetting agent and anti-aging agent into a reactor, heating and dissolving to a homogeneous state, and then vacuum dehydrating for 45min, at 80°C Add diisocyanate and keep it reacting at 100°C for 4 hours, take a sample to test that the viscosity value and NCO value are less than the theoretical value, and finally vacuum defoam and pack.

[0057] The amount of each component used is shown in Table 3 below.

[0058] Table 3 is each component consumption in embodiment 3

[0059]

[0060] The performance results of the above-mentioned embodiments are shown in Table 4 below.

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Abstract

The invention discloses a hot melt polyurethane adhesive for water-repellent fabric lamination and a preparation method thereof. The hot melt polyurethane adhesive comprises the following components by weight percentage: 95-100% of a polyurethane prepolymer, and 0-5% of an antioxidant and a wetting agent. The total mixing amount of the polyurethane prepolymer, the antioxidant and the wetting agentis 100%. According to the invention, a macromolecular compound synthesized by hydroxyl-terminated silicon-containing resin, hydroxyl-terminated fluorocarbon resin or other diol containing C8 branch chain and monomers is adopted as the raw material to produce the reactive wet cured hot melt polyurethane adhesive product, which has an isocyanic acid radical group content of 1-4%. Compared with thecommon hot melt polyurethane adhesive for composite fabrics, the hot melt polyurethane adhesive prepared according to the invention has good adhesion to the base material treated by a water repellentagent, and also has small viscosity, low use temperature and soft handfeel.

Description

technical field [0001] The invention relates to a hot-melt polyurethane adhesive for bonding water-repellent fabrics and a preparation method thereof, belonging to the field of adhesives for composite fabrics. Background technique [0002] Water-repellent fabric has the characteristics of good water repellency, good air permeability, and soft hand feeling. It has unique advantages in waterproof clothing and tents for outdoor sports. But this kind of fabric is treated with fluorocarbon, silicon or C8 treatment agent. This results in a very low surface energy of the fabric. General adhesives are difficult to bond. In the past, this type of fabric lamination used oil-based adhesives, and the solvent treated the water-repellent coating to facilitate bonding. However, as the country's environmental control and people's requirements for environmental protection are getting higher and higher, the demand for high-performance and environmentally friendly adhesives is becoming more...

Claims

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Application Information

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IPC IPC(8): C09J175/06C08G18/42C08G18/76
CPCC09J175/06C08G18/4202C08G18/4277C08G18/7671
Inventor 熊峰
Owner 佛山市顺德区蓝德堡实业有限公司
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