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

Preparation method of water-resistant thermoplastic polyurethane hot melt adhesive

A thermoplastic polyurethane, hot melt adhesive technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of low water resistance, low mechanical strength, etc., to achieve excellent waterproof performance, short curing time , the effect of simple and easy process

Inactive Publication Date: 2020-08-28
YANCHENG INST OF TECH
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the application of thermoplastic polyurethane hot melt adhesives, there are disadvantages such as low water resistance and low mechanical strength.

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
  • Preparation method of water-resistant thermoplastic polyurethane hot melt adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 243.22g of polytetrahydrofuran ether glycol (PTMG-2000) into a 500ml three-necked flask and stir quickly, dehydrate at -0.1MPa, 105°C for 2 hours, and when the temperature drops to about 50°C, add 100.04g 4,4'-Dicyclohexylmethane diisocyanate (H 12 MDI), react naturally for 30 minutes, then slowly raise the temperature to 80°C and continue the reaction for 1 hour, then add 0.20 g of dibutyltin dilaurate catalyst and continue the reaction for 1 hour to obtain a polyurethane prepolymer with terminal isocyanate groups, the final free isocyanate group of the system The mass fraction is about 3%. Take 92g of the prepared prepolymer and cool it down to 45°C, add 6.08g of 1,4-butanediol (BDO), and then stir at high speed to make it evenly mixed. Finally, the prepared adhesive was vacuumed and degassed for 20 minutes, and nitrogen gas was introduced, discharged under the protection of nitrogen gas, put into a vacuum oven for curing, and the temperature was set at 100°C. Af...

Embodiment 2

[0025] Same as Example 1, the difference is that the quality of the prepolymer taken is 40.6g, the quality of the added BDO is 1.48g, and 2.03g of liquid fluororubber is also added while adding BDO, and the liquid fluororubber is vinylidene fluoride and hexafluoropropylene. The copolymer of the body, wherein the dosage of the liquid fluororubber additive is 5 parts per 100 parts of the polyurethane prepolymer, and the finished PU hot melt adhesive containing the liquid fluororubber additive can be obtained.

Embodiment 3

[0027] Same as Example 2, except that the quality of the prepolymer taken is 40.23g, the quality of the added liquid fluororubber is 4.02g, and the amount of the liquid fluororubber additive is 10 parts per 100 parts of polyurethane prepolymer.

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 preparation method of a water-resistant thermoplastic polyurethane hot melt adhesive. According to the method, oligomer polyol, diisocyanate and micromolecular diol are used as raw materials, organic tin is used as a catalyst, a prepolymer method is adopted to prepare a polyurethane adhesive, and a fluorine modifier is added to modify the polyurethane adhesive so that thethermoplastic polyurethane hot melt adhesive with good water resistance and high mechanical properties is prepared. In the preparation process of the hot melt adhesive, the system viscosity is moderate, the temperature is easy to control, the product quality is good, the performance is stable, the yield is high, and meanwhile the hot melt adhesive has good water resistance and mechanical performance. The hot melt adhesive has the advantages of low volatility, no toxicity, no pungent smell, no harm to constructors and users, good air permeability, and meeting of environmental protection and construction requirements.

Description

technical field [0001] The invention belongs to the technical field of hot-melt adhesive preparation, in particular to a preparation method of water-resistant thermoplastic polyurethane hot-melt adhesive. Background technique [0002] Hot-melt adhesive refers to a type of polymer adhesive that is melted in a heated state, coated and sizing, and then solidified by cooling to complete the bonding process. It is a type of solvent-free thermoplastic adhesive. Hot melt adhesive is an environmentally friendly adhesive, and in recent years, with the development and application of it, it has become a new type of adhesive, because the product itself is a solid, easy to pack, transport and store, no solvent, no pollution, production It is favored for its simple process, high added value, high bonding strength, and fast curing. [0003] Polyurethane hot melt adhesive is a kind of adhesive with high polarity and activity, which is formed by addition polymerization of organic diisocyana...

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
IPC IPC(8): C09J175/04C09J127/16C08G18/75C08G18/66C08G18/48C08G18/10C08G18/32
CPCC08G18/10C08G18/4854C08G18/758C09J175/04C08G18/3206C08L27/16
Inventor 李娟丁亮杜建周王玲芳王成双张良邱峻王静静
Owner YANCHENG INST OF TECH