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Two-component polyurethane adhesive for coating metal section product with polymeric film

A two-component polyurethane and metal profile technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of slow crystallization of the adhesive layer, residual formaldehyde and phenol, easy foaming, etc. Achieve good bonding effect, good bonding strength, and strong practicability

Inactive Publication Date: 2019-11-22
佛山市同人粘胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional metal profile coating glue is usually made by dissolving TPU in a solvent. In order to obtain better initial adhesion and bonding strength, it is generally compounded with phenolic resin that acts as a thickener. The polyurethane produced by this method Adhesive will have several problems: 1. The color of the film is easy to yellow; 2. There will be formaldehyde and phenol residues; 3. The crystallization speed of the glue layer is slow, easy to foam, and the adhesion to metal is average, which needs to be improved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0026] The two-component polyurethane adhesive for polymer film coating metal profiles described in this example is composed of the following components in weight percentage: polyester polyol: 25.5%, diisocyanate: 5.5%, dimethylol propionic acid : 1.5%, 1,4-butanediol: 1%, diluent: 64.5%, antioxidant: 0.3%, plasticizer: 1.3%, catalyst 0.1%, terminator 0.3%.

[0027] The processing flow of the present embodiment is as follows:

[0028] 1. Preheat the reaction kettle, the preheating temperature is 80 degrees Celsius, preheating for half an hour;

[0029] 2. Put 25.5% polyester polyol and 5.5% diisocyanate into the preheated reaction kettle to carry out polymerization reaction. The reaction time is 2 hours and the reaction temperature is 80 degrees Celsius;

[0030] 3. Continue to put 1.5% dimethylolpropionic acid, 1% 1,4-butanediol, 0.1% catalyst and 32.25% diluent into the reactor, stir evenly, and the stirring reaction temperature is 90 degrees Celsius ;

[0031] 4. After s...

Embodiment 3

[0034] The two-component polyurethane adhesive for polymer film coating metal profiles described in this example is composed of the following components in weight percentage: polyester polyol: 25%, diisocyanate: 6%, dimethylol propionic acid : 1%, 1,4-butanediol: 0.6%, diluent: 65%, antioxidant: 0.2%, plasticizer: 2%, catalyst 0.1%, terminator 0.1%.

[0035] The processing flow of the present embodiment is as follows:

[0036] 1. Preheat the reaction kettle, the preheating temperature is 80 degrees Celsius, preheating for half an hour;

[0037] 2. Put 25% polyester polyol and 6% diisocyanate into the preheated reaction kettle to carry out polymerization reaction. The reaction time is 2 hours and the reaction temperature is 80 degrees Celsius;

[0038] 3. Continue to put 1% dimethylolpropionic acid, 0.6% 1,4-butanediol, 0.1% catalyst and half mass of 32.5% diluent into the reactor, stir evenly, and stir the reaction temperature 90 degrees Celsius;

[0039] 4. After stirring ...

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Abstract

The invention discloses a two-component polyurethane adhesive for coating a metal section product with a polymeric membrane, and relates to the technical field of adhesives. The two-component polyurethane adhesive includes, by weight, 25%-26% of polyester polyol, 4%-6% of diisocyanate, 1%-2% of dimethylolpropionic acid, 0.5%-1% of 1,4-butanediol, 69%-63% of a diluent, 0.2%-0.5% of an antioxidant,1%-2% of a plasticizer, 0.1%-0.3% of a catalyst and 0.1%-0.5% of a terminator. The adhesive has better initial adhesion and bonding strength, can avoid the phenomena of bubbling, rebounding and the like when achieving a substrate damaging effect, and has stronger practicability.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a two-component polyurethane adhesive used for coating metal profiles with polymer films. Background technique [0002] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain. It is divided into two categories: polyisocyanate and polyurethane. Because it contains isocyanate and carbamate groups with strong polarity and high chemical activity, it can be combined with materials containing active hydrogen, such as foam plastics, wood, leather, etc. Porous materials such as fabrics, paper, and ceramics, as well as materials with smooth surfaces such as metals, glass, rubber, and plastics, have excellent chemical adhesion. The hydrogen bond between the polyurethane and the material to be bonded will enhance the cohesion of the molecules, thus making the bond stronger. [0003] Traditional metal profile coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/66C08G18/42C08G18/34C08G18/10
CPCC09J175/06C08G18/10C08G18/42C08G18/348C08G18/3206
Inventor 许为民
Owner 佛山市同人粘胶有限公司
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