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Low-melting point thermoplastic polyurethane adhesive and preparation method thereof

A thermoplastic polyurethane and adhesive technology, used in polyurea/polyurethane adhesives, adhesives, adhesive additives, etc., can solve the problems of low peel strength, poor washing resistance, high processing and bonding temperature, and achieve improved processing and Excellent effect of thermal bonding performance, low initial flow temperature and low temperature resistance

Inactive Publication Date: 2018-02-27
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most thermoplastic polyurethane adhesives used in clothing, shoe materials, luggage and other fields generally have the characteristics of high processing and bonding temperature, poor adhesion and low peel strength.
Patent CN 104263259A increases the bonding strength of thermoplastic polyurethane adhesive by adding a large amount of resin tackifier and inorganic filler. The thermoplastic polyurethane adhesive prepared by this method has poor transparency and complicated processing technology, high hardness, and is not Environmental protection, especially the added tackifying resin is easy to produce harmful substances to the human body
In addition, the thermoplastic polyurethane adhesive currently used in the clothing industry has a high processing temperature, poor washing resistance, and is easy to wash and whiten. Therefore, it is imperative to synthesize and prepare a low processing temperature, good transparency, and no additives. TPU Adhesive with High Peel Strength Meets Apparel Manufacturing Needs

Method used

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  • Low-melting point thermoplastic polyurethane adhesive and preparation method thereof
  • Low-melting point thermoplastic polyurethane adhesive and preparation method thereof
  • Low-melting point thermoplastic polyurethane adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A low melting point thermoplastic polyurethane adhesive, which is mainly prepared from the following raw materials by weight fraction:

[0028]

[0029] (1) polybutylene sebacate diol (M-500), two (2,6)-diisopropyl carboimide, antioxidant 1010 joins in reactor A by weight percentage, nitrogen protection , keep the temperature of reactor A at 95°C, and fully stir in reactor A evenly. Add MDI to reactor B by weight percentage, protect the reactor with nitrogen, and keep the temperature of the reactor at 40°C. Add 1,6-hexanediol into reactor C according to the weight percentage, under nitrogen protection, keep the temperature of the reactor at 55°C, and fully stir in reactor C evenly.

[0030] (2) When the temperature of each reactor is stable, through the perfusion system with accurate metering, the raw material components in the reactors A, B and C are accurately metered by the metering pump according to the weight percentage of each component in the three reactors. ...

Embodiment 2

[0032] A low melting point thermoplastic polyurethane adhesive, which is mainly prepared from the following raw materials by weight fraction:

[0033]

[0034] The specific preparation process is the same as in Example 1, the difference being that the temperature of the reactor A is 100°C, the temperature of the reactor B is 50°C, and the temperature of the reactor C is 50°C; and radial shear dispersion for 3 minutes; the temperature of the twin-screw extruder was 165°C, and the screw speed was 170rmp.

Embodiment 3

[0036] A low melting point thermoplastic polyurethane adhesive, which is mainly prepared from the following raw materials by weight fraction:

[0037]

[0038] The specific preparation process is the same as in Example 1, except that the hydrolysis-resistant agent is monocarbodiimide; the holding temperature of reactor A is 98°C, the holding temperature of reactor B is 60°C, and the holding temperature of reactor C is 58°C; In the twin-screw premixing unit, it was dispersed by high-speed axial and radial shearing for 5 minutes; the temperature of the twin-screw extruder was 160°C, and the screw speed was 180rmp.

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Abstract

The invention relates to a low-melting point thermoplastic polyurethane adhesive and a preparation method thereof. The low-melting point thermoplastic polyurethane adhesive is prepared from the following raw materials in percentage by weight: 61-75 percent of polymer polyol, 20-36 percent of isocyanate, 2-4 percent of a chain extender, 0.2-0.5 percent of an antioxidant and 0.1-0.5 percent of a hydrolytic stabilizer. Aiming to the disadvantages of the thermoplastic polyurethane adhesive applied to the existing clothing field, the low-melting point thermoplastic polyurethane adhesive provided bythe invention has the advantages of low processing temperature, excellent low temperature resistance performance, water resistance, high peeling strength and high adhesive strength. The invention provides the preparation method of the low-melting point thermoplastic polyurethane adhesive at the same time.

Description

technical field [0001] The invention belongs to the technical field of polyurethane adhesives, and in particular relates to a low melting point thermoplastic polyurethane adhesive and a preparation method thereof. Background technique [0002] With the development of polyurethane materials, polyurethane is more and more applied to all aspects of production and life due to its excellent performance and various processing properties. Thermoplastic polyurethane adhesive has strong adhesion fastness, excellent washing resistance, high elasticity, wide range of hardness, high peel strength, suitable for various processing temperature requirements, long-lasting elasticity, can keep clothes without deformation for a long time, anti-yellowing Strong performance and other advantages. The thermoplastic polyurethane adhesive is processed into polyurethane hot melt adhesive film or rubber powder, which is mainly used in clothing, footwear, heat sealing, printing, leather, handicrafts o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C09J11/06C08G18/76C08G18/66C08G18/42C08G18/32C08G18/48
CPCC08G18/3206C08G18/4238C08G18/4854C08G18/664C08G18/6674C08G18/7671C08K5/29C08K2201/014C09J11/06C09J175/06C09J175/08
Inventor 陈海良管永贺宽宽彭程
Owner SHANDONG INOV POLYURETHANE
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