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Solvent-resistant and hydrolysis-resistant urethane resin adhesive

A polyurethane resin, hydrolysis-resistant technology, used in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve problems such as poor adhesion, poor compatibility, and poor resin strength.

Inactive Publication Date: 2011-09-14
SHANGHAI HUIDE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility of polyester and polyether, the obtained resin has poor self-strength due to serious phase separation, resulting in poor adhesion.

Method used

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  • Solvent-resistant and hydrolysis-resistant urethane resin adhesive
  • Solvent-resistant and hydrolysis-resistant urethane resin adhesive
  • Solvent-resistant and hydrolysis-resistant urethane resin adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Raw material name Weight (kg)

[0030] Polyester polyol (number average molecular weight 1500, self-made) 200

[0031] PPG3000 300

[0032] EG (ethylene glycol) 29.6

[0033] BG (butanediol) 12.3

[0034] NPG (octylpentylene glycol) 7

[0035] MDI (phenylmethane-4,4`-diisocyanate) 230

Embodiment 2

[0037] Raw material name Weight (kg)

[0038] Polyester polyol (number average molecular weight 2000, self-made) 225

[0039] PPG2000 275

[0040] EG (ethylene glycol) 48.3

[0041] NPG (octylpentylene glycol) 9

[0042] MDI (diphenylmethane-4,4`-diisocyanate) 279

[0043] The preparation method of Example 1 and Example 2 is solution polymerization, using methyl ethyl ketone as solvent, the viscosity is about 20000-30000mPa·s when the solid content is 40%, the sizing is direct coating, bonding, and drying at 80°C.

[0044] Dry the resin solution at 80°C and cut it into strips with a thickness*width*length of 2*20*150mm. Solvent resistance: the adhesive products of the products obtained in the two examples and Bayer DP9380AU will not be shelled in methyl ethyl ketone for 12 hours. combined see table 1

[0045] Table 1

[0046] Loss Rate§

[0047] To sum up, the solvent-resistant and hydrolysis-resistant polyurethane resin adhesive provided by the present invent...

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Abstract

The invention discloses a solvent-resistant and hydrolysis-resistant urethane resin adhesive. The adhesive is obtained by mixing polyether polyol with polyester polyol and making a chain extender react with isocyanate, wherein the polyester polyol is a side chain-containing hydroxyl-terminated low polymer. The hydrolysis resistance and solvent resistance of the solvent-resistant and hydrolysis-resistant urethane resin adhesive provided by the invention are equivalent to or surpass that of an imported product, i.e., Bayer DP9380AU.

Description

technical field [0001] The invention relates to a polyurethane adhesive for shoemaking, in particular to a solvent-resistant and hydrolysis-resistant polyurethane resin adhesive. Background technique [0002] Polyurethane (PU) adhesives are adhesives containing urethane groups (-NHCOO-) and / or isocyanate groups (-NCO) in their molecular chains. Due to their superior performance, they are widely used in the national economy. Polyurethane adhesives contain highly polar and chemically active isocyanate groups (-NCO) and carbamate groups (-NHCOO-), which are compatible with materials containing active hydrogen, such as wood, leather, fabrics, paper, ceramics, etc. Porous materials and materials with smooth surfaces such as metal, glass, and rubber have excellent chemical adhesion, so polyurethane adhesives are widely used in shoemaking, leather, clothing and other industries. [0003] On the assembly line of the shoemaking industry, the adhesives used are often solvent-based. T...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J175/08C08G18/66C08G18/42
Inventor 钱建中钱洪祥蔡华兵陈桂莲黄诚
Owner SHANGHAI HUIDE TECH CO LTD
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