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High-strength aluminum film plating compound adhesive and preparation method thereof

A composite adhesive and aluminized film technology, applied in the direction of adhesive types, polyurea/polyurethane adhesives, adhesives, etc., can solve the problems that cannot meet the packaging requirements of high-end aluminized film

Active Publication Date: 2015-01-28
JIANGSU LIHE ADHESIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] It can be seen that although this adhesive has higher peel strength than ordinary aluminized film, it still cannot meet the requirements of high-end aluminized film packaging with a peel strength greater than 3.0N / 15mm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of main glue:

[0030] The first step is the preparation of polyester polyol:

[0031] In a four-necked flask with a thermometer, stirrer, ball cooler, and nitrogen tube, add 80 g of dimer acid, 330 g of diethylene glycol and 0.20 g of tetrabutyl titanate catalyst, and pass nitrogen under stirring. , And then slowly heat the four-necked flask to 160℃~235℃ to carry out the esterification reaction, control the outlet temperature of the ball cooler to be lower than 100℃ to react, the water output reaches the theoretical amount of 5g and then the temperature is reduced to 140℃, and then added Diacid 460g, methyl propylene glycol 110g, react at 160℃~220℃ for 14 hours, take a sample to measure the acid value, the acid value is 23mgKOH / g, stop nitrogen flow after the esterification is qualified, and carry out polycondensation at 220~230℃ In the reaction, vacuum was applied for 5 hours at -0.1Mpa to obtain 790 g of polyester polyol with an acid value of 0.5 mgKOH / g ...

Embodiment 2

[0041] (1) Preparation of main glue:

[0042] The first step is the preparation of polyester polyol:

[0043] In a four-necked flask with a thermometer, stirrer, ball cooler, and nitrogen tube, add 90 g of dimer acid, 350 g of diethylene glycol and 0.25 g of tetrabutyl titanate catalyst, and pass nitrogen under stirring. , And then slowly heat the four-necked flask to 160℃~235℃ to carry out the esterification reaction, control the outlet temperature of the ball cooler to be lower than 100℃ to react, the water output reaches the theoretical amount of 5.8g and then the temperature is reduced to 140℃, and then added Isophthalic acid 460g, 1,4-butanediol 80g, neopentyl glycol 30g, after reacting at 160℃~220℃ for 14 hours, take a sample to measure the acid value, the acid value is 22mgKOH / g, stop the nitrogen flow after the esterification is qualified , Carry out polycondensation reaction at a temperature of 220-230°C and vacuum for 5 hours at -0.1Mpa to obtain 790g of polyester polyol...

Embodiment 3

[0053] (1) Preparation of main glue:

[0054] The first step is the preparation of polyester polyol:

[0055] Add 100g of dimer acid, 340g of diethylene glycol and 0.3g of tetrabutyl titanate catalyst in a four-necked flask with thermometer, stirrer, ball cooler and nitrogen tube, and pass nitrogen under stirring. , And then slowly heat the four-necked flask to 160℃~235℃ to carry out the esterification reaction, control the outlet temperature of the ball cooler to be lower than 100℃ to react, the water output reaches the theoretical amount of 6.4g and then the temperature is reduced to 140℃, and then added 360g of adipic acid, 100g of isophthalic acid, 110g of neopentyl glycol, after reacting at 160℃~220℃ for 14 hours, take a sample to measure the acid value. The acid value is 20mgKOH / g. After the esterification is qualified, stop the nitrogen flow. The polycondensation reaction was carried out at 220-230°C, and vacuum was applied for 5 hours at -0.1Mpa to obtain 790g of polyester...

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Abstract

The invention discloses a high-strength aluminum film plating compound adhesive and a preparation method of the high-strength aluminum film plating compound adhesive. A main adhesive body is polyester polyol with a dimer acid structure, a curing agent is a NCO prepolymer with a dimer acid structure, and the ratio of the main adhesive body to the curing agent is 5:1 to 5:1.5. Because both the adhesive body and the curing agent have the long-chain structures of dimer acid, mutual permeation between an organic interface and an inorganic interface can be improved through a coupling agent, and combined strength is improved. A colloid obtained after the main adhesive body of the long-chain structure and the curing agent of the long-chain structure are mixed is softer and higher in cohesion, an adhesive layer formed by compositing the colloid and a polyester film is high in bonding strength and good in softness, the bonding force between an aluminum-plated layer and the polyurethane adhesive layer is similar to that between an external plastic base material and the aluminum-plated layer, the factors which can easily cause stripping of the aluminum-plated layer from the external plastic base material are eliminated, the phenomenon that an aluminum-plated layer shifts can be eliminated, bonding strength is improved, and corrosion resistance is better.

Description

Technical field: [0001] The invention relates to a high-strength aluminized film composite adhesive and a preparation method thereof. Background technique: [0002] Aluminum-plated packaging products have heat insulation, light transmission performance, beautiful appearance, and low packaging prices. Therefore, they are widely used in imported biscuits, dried puffed foods, sour plums and other snack foods, medicines, and cosmetics. In recent years, the flexible packaging of beverages and liquid seasonings has also begun to use aluminized packaging, and the development speed is very fast, and the market prospect is very broad. Although aluminized film has many advantages in product packaging, it still has the following shortcomings: [0003] When using ordinary polyurethane glue to composite aluminized film, the aluminum layer of the aluminized film is easily transferred, which causes the aluminized layer of the composite film to peel off from the plastic substrate, resulting in a ...

Claims

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Application Information

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IPC IPC(8): C09J175/06C08G18/76C08G18/42C08K5/5425C08G18/66C08G18/32C08G63/181
Inventor 蔡炳照
Owner JIANGSU LIHE ADHESIVE
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