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Method for preparing adhesive for compounding aluminizing film

A technology of adhesives and aluminized films, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problem of low solid content of polyurethane adhesives, poor solvent release, transfer of aluminized layers, etc. problem, to achieve the effect of good wettability, less transfer amount and lower content

Active Publication Date: 2013-07-10
SICHUAN AILUN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the polyurethane adhesives produced for lamination of aluminized films have low solid content and high molecular weight. Full transfer, poor composite fastness, poor solvent release, serious appearance spots

Method used

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  • Method for preparing adhesive for compounding aluminizing film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The preparation method of the main agent;

[0012] 1) Preparation of polyester polyol; put 0.9mol of ethylene glycol and diethylene glycol (ethylene glycol: diethylene glycol = 1:2) into the reaction kettle, add 0.2mol of terephthalic acid, stir and heat up, When the temperature rises to 180°C, add 82ppm of tetraisopropyl titanate catalyst and continue to heat up to 190°C. When the water produced in the reaction system reaches the theoretical amount, add trimethylpentanediol and neopentyl glycol for a total of 0.3 mol (trimethylpentanediol: neopentyl glycol = 2:1), 0.8 mol of phthalic anhydride and adipic acid (phthalic anhydride: adipic acid = 1:3), keep warm for 4 Hours, sampling after the heat preservation is over, when the acid value is 14mgKOH / g, and the hydroxyl value is 120mgKOH / g, turn on the vacuum pump, and when the vacuum degree reaches -0.098MPa, esterify and polycondense for 2 hours to obtain polyester polyol, take a sample for detection, The acid value is...

Embodiment ２

[0018] The preparation method of the main agent;

[0019] 1) Preparation of polyester polyol; put 0.85mol of ethylene glycol and diethylene glycol (ethylene glycol: diethylene glycol = 3:14) into the reaction kettle, add 0.2mol of terephthalic acid, stir and heat up, When the temperature rises to 180°C, 82ppm of tetraisopropyl titanate catalyst is added, and the temperature continues to rise to 190°C. When the water produced in the reaction system reaches the theoretical amount, trimethylpentanediol and neopentyl glycol are added for a total of 0.35 mol (trimethylpentanediol: neopentyl glycol = 2.5:1), isophthalic acid and adipic acid total 0.7mol (isophthalic acid: adipic acid = 2:5), continue to heat up to 230°C Insulate at ~235°C for 4 hours. After the end of the incubation, take samples for testing. When the acid value is 12mgKOH / g and the hydroxyl value is 115mgKOH / g, turn on the vacuum pump. When the vacuum reaches -0.098MPa, esterify and polycondense for 2 hours to obta...

Embodiment ３

[0025] The preparation method of the main agent;

[0026] 1) Preparation of polyester polyol; put 0.8mol of ethylene glycol and diethylene glycol (ethylene glycol: diethylene glycol = 1:15) into the reaction kettle, add 0.25mol of terephthalic acid, stir and heat up , when the temperature rises to 180°C, 82ppm of tetraisopropyl titanate catalyst is added, and the temperature continues to rise to 190°C. When the water produced in the reaction system reaches the theoretical amount, trimethylpentanediol and neopentyl glycol are added 0.4mol (trimethylpentanediol: neopentyl glycol = 1:1), isophthalic acid, phthalic anhydride and adipic acid total 0.75mol (isophthalic acid: phthalic anhydride: adipic acid = 2:1:4.5 ), continue to heat up to 230 ℃ ~ 235 ℃ and keep warm for 4 hours. After the heat preservation is over, take a sample test. When the acid value is 10.3mgKOH / g and the hydroxyl value is 112.0mgKOH / g, turn on the vacuum pump. When the vacuum reaches -0.098MPa After 2 hour...

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Abstract

The invention provides a method for preparing an adhesive for compounding an aluminizing film. The method comprises a method for preparing a primary agent and a method for preparing a curing agent, and comprises the following operating steps of: preparing the primary agent, polyester polyol, and preparing the curing agent, polyisocyanate polymer. The primary agent is added in stages, and a solvent extraction method is adopted for the curing agent. The obtained product has a regular molecular structure, uniform molecular weight, low viscosity and high peel strength after compounding, can be coated at high concentration and is low in cost and environment-friendly, and lots of solvent is saved. The method is mainly used for compounding a common aluminizing film and compounding a poached aluminizing film.

Description

technical field [0001] The invention relates to a preparation method of an adhesive, in particular to a preparation method of an adhesive for aluminized film compounding. Background technique [0002] At present, the polyurethane adhesives produced for aluminized film lamination have low solid content and high molecular weight. When laminating with aluminized film, the aluminized layer transfers seriously, and some even transfer completely. The composite fastness is very poor, and the solvent release is poor. The spots are severe. Contents of the invention [0003] The preparation method of the bonding agent for aluminized film composite of the present invention comprises the preparation method of main agent and the preparation method of curing agent, and its operation steps are as follows: [0004] The preparation method of the main agent; [0005] 1) Preparation of polyester polyol; put 0.8-0.9 mol of ethylene glycol and diethylene glycol into the reaction kettle, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C08G18/76C08G18/42C08G18/32C08G63/672
Inventor 钟友昭陈渊曾金宇
Owner SICHUAN AILUN TECH
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