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Method for preparing temperature-resistant type compound bonding agent

A composite adhesive, temperature-resistant technology, used in adhesives and other directions, can solve the problems of high molecular weight, poor wetting and leveling performance, etc., achieve high cross-linking density, save organic diluent solvents, and ensure high temperature resistance. Effect

Active Publication Date: 2010-08-18
NANTONG GAOMENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of adhesive needs to add a large amount of organic solvents to achieve proper coating viscosity during the compounding process, and due to the high molecular weight, there are many aspects such as poor wetting and leveling performance on the film substrate after coating. The problem

Method used

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  • Method for preparing temperature-resistant type compound bonding agent
  • Method for preparing temperature-resistant type compound bonding agent
  • Method for preparing temperature-resistant type compound bonding agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a method for preparing a temperature-resistant composite adhesive, which can prepare a high-performance temperature-resistant composite adhesive used in composite flexible packaging film materials. The preparation method includes:

[0026] First prepare polyester polyol, and each raw material in the following steps is calculated by mass percentage;

[0027] a. Esterification reaction:

[0028] Combine 3 to 6% of trimethylolpropane, 20 to 30% of terephthalic acid, 20 to 30% of sebacic acid, 15 to 25% of diethylene glycol, and 15 to 25% of neopentyl Glycol was added to the polyester synthesis kettle, heated to 210-230°C, reacted for 2 to 3 hours to complete the esterification; in the esterification reaction step, keep the water output of the polyester synthesis kettle stable at the total amount of raw materials used in the esterification reaction 0.5-1% / hour of the mass, the water distilled during the esterification process accounts for 6-12% of the tot...

Embodiment 2

[0039] This embodiment provides a method for preparing a temperature-resistant composite adhesive, which can prepare a high-performance temperature-resistant composite adhesive used in composite flexible packaging film materials. The preparation method includes:

[0040] To prepare the adhesive (first prepare the polyester polyol), take the raw materials as follows:

[0041]

[0042] Steps:

[0043] a. Esterification reaction:

[0044] 3.75 parts by mass of trimethylolpropane, 25 parts by mass of terephthalic acid, 22.5 parts by mass of sebacic acid, 18.75 parts by mass of diethylene glycol, and 15 parts by mass of neopentyl glycol were added to the poly In the ester synthesis kettle, heat up to 210-230°C and react for 2.5 hours; during the reaction, pay attention to the water output of the polyester synthesis kettle and keep the water output stable at 0.5-1% per hour based on the total mass of each raw material; distilled water 9.42 parts by mass; after the esterification reaction i...

Embodiment 3

[0052] This embodiment provides a method for preparing a temperature-resistant composite adhesive, which can prepare a high-performance temperature-resistant composite adhesive used in composite flexible packaging film materials. The preparation method includes:

[0053] To prepare the adhesive, take the raw materials as follows:

[0054]

[0055] Steps:

[0056] a. Esterification reaction:

[0057] 5 parts by mass of trimethylolpropane, 21 parts by mass of terephthalic acid, 28 parts by mass of sebacic acid, 18 parts by mass of diethylene glycol, and 18 parts by mass of neopentyl glycol were added to the poly In the ester synthesis kettle, heat up to 210-230°C and react for 3 hours: During the reaction, pay attention to the water output of the polyester synthesis kettle, and keep the water output stable at 0.5-1% of the total mass of the raw materials used in the esterification reaction per hour , Distilled water 9.53 parts by mass; After the esterification reaction is completed, th...

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Abstract

The invention discloses a method for preparing a temperature-resistant type compound bonding agent. The method comprises: a, esterifying reaction, namely adding trimethylolpropane, terephthalic acid, decanedioic acid, diglycol and neopentylene glycol into a polyester synthesis kettle, heating the mixture, and realizing complete esterificaiton after the reaction; b, polycondensation reaction, namely creating a low vacuum of -0.04 to -0.02MPa by pumping in the polyester synthesis kettle by pumping after the esterifying reaction is completed first, then creating a high vacuum of -0.09 to -0.05MPa by pumping in the polyester synthesis kettle with the temperature of the kettle kept between 245 and 255 DEG C during the high-vacuum pumping, and finally creating a volume of-0.094MPa by long-term pumping in the kettle, and after the long-vacuum pumping, completing the polycondensation reaction to obtain polyester polyhydric alcohol; and c, dissolution, namely cooling the prepared polyester polyhydric alcohol, adding acetic ether, and uniformly stirring the mixture to obtain the compound bonding agent. In the method, micromolecular tri-functionality polyhydric alcohol is added in the synthetic process of the polyester polyhydric alcohol, so that the prepared polyester polyhydric alcohol has more than two active end groups, and after the polyester polyhydric alcohol is cured by using a conventional multi-functionality curing agent, the crosslinking density is bigger and the temperature resistance is guaranteed.

Description

Technical field [0001] The invention relates to the field of polymer adhesives, and more specifically, to a method for preparing high-performance temperature-resistant composite adhesives. Background technique [0002] Composite flexible packaging film is usually composed of several layers of films of different materials. Since its inception in the 1950s, due to its excellent comprehensive performance, it has been widely used in food, medicine, cosmetics, daily necessities, chemicals, weapons and ammunition, precision instruments, Instrumentation complete sets of equipment and electronic appliances and other industries. The composite film production processes used in flexible packaging mainly include extrusion composite and dry composite. The dry composite method has low equipment investment, high product quality, simple technology, and wide application. Its product output accounts for more than 50% of all composite films. , According to the requirements of the packaging, food f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/02C08G63/672C08G63/20
Inventor 赫长生沈峰邓煜东
Owner NANTONG GAOMENG NEW MATERIAL
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