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Preparation method of waterborne polyurethane leather glue

A water-based polyurethane and adhesive technology, used in textiles, papermaking, fiber processing, etc., to achieve the effects of low price, high solid content and shortened curing time

Inactive Publication Date: 2013-04-10
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material still has the disadvantages of insufficient solid content, unsatisfactory bonding strength and mechanical properties, and the market price is relatively high. In the actual use process, there are still some shortcomings such as a small amount of organic solvents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The prepolymer was prepared from isophorone diisocyanate (IPDI), polycaprolactone diol (PCL1000), glucose (PG) and dimethylolpropionic acid (DMPA), and reacted for 2 hours. The molar ratio of IPDI to PCL1000, PG, and DMPA is 1.2:1, PG accounts for 2% of the mass of the prepolymer, and DMPA accounts for 5% of the mass of the prepolymer. Add carboxylated styrene-butadiene glue emulsion to modify the prepolymer. The carboxylated styrene-butadiene glue emulsion accounts for 35% of the mass of the prepolymer, and react for 50 minutes. Cool down to 40°C, add triethylamine for neutralization reaction to generate salt, the amount of triethylamine is the same as that of DMPA, and react for 3 minutes. Water was added for emulsification for 60 minutes, and the amount of water used was twice the total mass of the prepolymer to obtain a water-based polyurethane leather adhesive.

Embodiment 2

[0020] The prepolymer was prepared from isophorone diisocyanate (IPDI), polycaprolactone diol (PCL1000), glucose (PG) and dimethylolpropionic acid (DMPA), and reacted for 2 hours. The molar ratio of IPDI to PCL1000, PG, and DMPA is 1.3:1, PG accounts for 3% of the mass of the prepolymer, and DMPA accounts for 6% of the mass of the prepolymer. Add carboxylated styrene-butadiene glue emulsion to modify the prepolymer. The carboxylated styrene-butadiene glue emulsion accounts for 30% of the mass of the prepolymer, and react for 50 minutes. Cool down to 40°C, add triethylamine for neutralization reaction to generate salt, the amount of triethylamine is the same as that of DMPA, and react for 3 minutes. Water was added for emulsification for 60 minutes, and the amount of water used was twice the total mass of the prepolymer to obtain a water-based polyurethane leather adhesive.

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PUM

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Abstract

The invention discloses a preparation method of waterborne polyurethane leather glue. The waterborne polyurethane leather glue is prepared by preparing a prepolymer based on isophorone diisocyanate (IPDI), polycrylactone 1000 (PCL1000), propylene glycol (PG) and dimethylol propionic acid (DMPA) as raw materials; modifying the prepolymer by adding a proper amount of carboxyl butadiene-styrene rubber water emulsion; adding triethylamine and carrying out a neutralization reaction to produce salt; and adding a proper amount of de-ionized water. The waterborne polyurethane leather glue disclosed by the invention has the advantages of high solid content, good binding power, strong environmental protection property and the like.

Description

technical field [0001] The invention relates to a preparation method of a water-based polyurethane leather adhesive, which belongs to the field of chemical industry. technical background [0002] The application of polyurethane materials covers all fields of production and life, and plays an important role in economic development. However, this material still has the disadvantages of insufficient solid content, unsatisfactory bonding strength and mechanical properties, and the market price is relatively high. In the actual use process, there are still some shortcomings such as a small amount of organic solvent. Therefore, in the process of R&D and application of waterborne polyurethane materials, it is still necessary to carry out in-depth research and improvement. [0003] Therefore must adopt the method for the water-based polyurethane of modification, make the product that makes have higher solid content, cohesiveness is good, environmental protection is strong. This p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/572D06M15/693C08G18/75C08G18/66C08G18/42C08G18/32
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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