Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of TPU hot melt adhesive and preparation method thereof

A hot melt adhesive, diisocyanate technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of poor mechanical strength of TPU hot melt adhesives, and achieve low softening point and tensile strength. and tear strength improvement, low melt viscosity effect

Active Publication Date: 2022-04-05
上海抚佳精细化工有限公司
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the defects of poor mechanical strength of TPU hot melt adhesives with lower hardness or softening point, thereby providing a TPU hot melt adhesive and its preparation method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of TPU hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of TPU hot-melt adhesive, its preparation method is as follows:

[0045] (1) get polybutylene adipate diol (M n =1000) 70kg, 4,4-diphenylmethane diisocyanate 25kg, 1,4-butanediol 3.5kg, 2-ethylhexylamine 0.26kg, antioxidant 10100.1kg, erucamide 0.1kg, photostable Agent 770 0.1kg and dibutyltin dilaurate 0.02kg, mix uniformly to obtain a mixture;

[0046] (2) Add the mixture obtained in step (1) into the feed section of the twin-screw extruder, extrude it at an extrusion temperature of 170°C and an extrusion pressure of 5MPa, and obtain TPU heat after underwater pelletizing and aging. Melt glue.

Embodiment 2

[0048] A kind of TPU hot-melt adhesive, its preparation method is as follows:

[0049] (1) get polybutylene adipate diol (M n =700) 73kg, 4,4-diphenylmethane diisocyanate 26kg, 1,4-butanediol 1kg, 2-ethylhexylamine 0.1kg, antioxidant 1076 0.2kg, stearic acid amide 0.2kg, light Stabilizer 622 0.2kg and dibutyl tin dilaurate 0.02kg, mix homogeneously to obtain compound;

[0050](2) The mixture obtained in step (1) is poured onto a conveyor belt with a heating system, aged and crushed in a drying tunnel at 120°C, and then the crushed material is added to a twin-screw extruder for extrusion, and continuously processed under water Granulating and curing to obtain TPU hot melt adhesive.

Embodiment 3

[0052] A kind of TPU hot-melt adhesive, its preparation method is as follows:

[0053] (1) get polybutylene adipate diol (M n =3000) 62kg, 4,4-diphenylmethane diisocyanate 28.1kg, 1,6-hexanediol 10kg, 2-ethylhexylamine 2kg, antioxidant 10100.1kg, antioxidant 168 0.2kg, erucic acid Amide 0.3kg, light stabilizer 770 0.18kg, light stabilizer 622 0.2kg and stannous octoate 0.02kg, mix to obtain compound;

[0054] (2) Add the mixture obtained in step (1) into the feed section of the twin-screw extruder, extrude it at an extrusion temperature of 150°C and an extrusion pressure of 3MPa, and obtain TPU heat after underwater pelletizing and aging. Melt glue.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a TPU hot melt adhesive and a preparation method thereof. The TPU hot melt adhesive comprises the following raw material components in parts by weight: 59-73 parts of polyol, 25-33 parts of diisocyanate, 0.1-2 parts of primary amine, 1-10 parts of chain extender and 0 parts of auxiliary agent -1 part, wherein, the functionality of the primary amine is 1 and contains a group with a branched structure and / or a cyclic structure. The TPU hot melt adhesive provided by the present invention has a lower softening point and melt viscosity, and has excellent tensile strength and tear strength, so that the TPU hot melt adhesive can effectively reduce energy consumption and adapt to more severe applications during use It can be widely used in fabric lamination, outdoor equipment, sanitary products and 3C packaging and other fields.

Description

technical field [0001] The invention relates to the field of hot melt adhesives, in particular to a TPU hot melt adhesive and a preparation method thereof. Background technique [0002] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain. Polyurethane adhesives have been developed rapidly due to their excellent adhesion, outstanding elasticity, wear resistance, and low temperature resistance, and have been widely used in shoemaking, packaging, wood processing, automobiles, textiles, electromechanical, aerospace Aviation and other industrial sectors. Among them, TPU (Thermoplastic Urethane, thermoplastic polyurethane elastomer) hot melt adhesive is an environmentally friendly one-component adhesive, which is easy to construct and use, and can quickly bond a variety of substrates. It has excellent water resistance, solvent resistance and low temperature resistance. performance, and easy to transpo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C08G18/10C08G18/12C08G18/42C08G18/66C08G18/32
CPCC09J175/06C08G18/664C08G18/4238C08G18/10C08G18/12C08G18/4202C08G18/425C08G18/3206
Inventor 王伟郭彦斌杨友利李玉博
Owner 上海抚佳精细化工有限公司