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A kind of high-strength aluminized film composite adhesive and preparation method thereof

A composite adhesive, aluminized film technology, applied in the direction of adhesive types, polyurea/polyurethane adhesives, adhesives, etc., can solve problems such as the inability to meet the requirements of high-end aluminized film packaging

Active Publication Date: 2016-05-11
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, the preparation of polyester polyol:

[0031] In a four-neck flask equipped with a thermometer, a stirrer, a spherical cooler, and a 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-neck flask to 160°C to 235°C for esterification reaction, control the outlet temperature of the ball cooler to be lower than 100°C for reaction, and cool down to 140°C after the water output reaches the theoretical amount of 5g, then add hexyl Diacid 460g, methyl propylene glycol 110g, react at 160°C-220°C for 14 hours, take a sample to measure the acid value, the acid value is 23mgKOH / g, stop passing nitrogen after the esterification is qualified, and carry out polycondensation at a temperature of 220-230°C Reaction, vacuumize at -0.1Mpa for 5 hours to obtain 790g of polyester polyol with an acid value of 0.5mgK...

Embodiment 2

[0041] (1) Preparation of main glue:

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

[0043] In a four-neck flask equipped with a thermometer, a stirrer, a spherical cooler, and a 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 , then slowly heat the four-neck flask to 160°C to 235°C for esterification reaction, control the outlet temperature of the ball cooler to be lower than 100°C for reaction, and cool down to 140°C after the water output reaches the theoretical amount of 5.8g, then add 460g of isophthalic acid, 80g of 1,4-butanediol, 30g of neopentyl glycol, after reacting at 160°C to 220°C for 14 hours, take a sample to measure the acid value, the acid value is 22mgKOH / g, stop nitrogen after the esterification is qualified , polycondensation reaction was carried out at a temperature of 220-230°C, and vacuumized at -0.1Mpa for 5 hours to obtain 790g of polyester ...

Embodiment 3

[0053] (1) Preparation of main glue:

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

[0055] In a four-neck flask equipped with a thermometer, a stirrer, a spherical cooler, and a nitrogen tube, add 100 g of dimer acid, 340 g of diethylene glycol and 0.3 g of tetrabutyl titanate catalyst, and pass nitrogen under stirring , and then slowly heat the four-necked flask to 160°C to 235°C for esterification reaction, control the outlet temperature of the ball cooler to be lower than 100°C for reaction, and cool down to 140°C after the water output reaches the theoretical amount of 6.4g, then add Adipic acid 360g, isophthalic acid 100g, neopentyl glycol 110g, after reacting at 160°C-220°C for 14 hours, take a sample to measure the acid value, the acid value is 20mgKOH / g, stop passing nitrogen after the esterification is qualified, at temperature Carry out polycondensation reaction at 220-230°C, and vacuumize at -0.1Mpa for 5 hours to obtain 790g of polyester polyol wi...

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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] Aluminized film packaging products have heat insulation, anti-light transmission properties, and at the same time have a beautiful appearance and low packaging price, so they are widely used in the outer packaging of imported biscuits, dry puffed food, sour plum and other leisure foods, medicines, cosmetics, etc. , In recent years, flexible packaging of beverages and liquid condiments has also begun to use aluminized film 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 disadvantages: [0003] When ordinary polyurethane glue is used to compound the aluminized film, the aluminum layer of the aluminized film is easily transferred, which will cause the aluminized layer of the compos...

Claims

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Application Information

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