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Polyurethane adhesive containing epoxy-terminated polyether and preparation method

A technology of epoxy-terminated polyether and polyurethane adhesives, which is applied in the direction of polyurea/polyurethane adhesives, polyether adhesives, adhesives, etc., and can solve problems affecting bonding performance, poor temperature resistance, delamination, etc. question

Active Publication Date: 2015-12-09
广东国望精细化学品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of the food industry, people have higher and higher requirements for polyurethane adhesives for composite films. From the perspective of food safety, most food flexible packaging must be sterilized at high temperature with the contents in it. The sterilization temperature is Between 100°C and 135°C, this requires polyurethane adhesives for composite films to have certain high temperature resistance and chemical resistance. As we all know, ordinary polyurethane adhesives have poor temperature resistance, and carbamate groups are prone to occur Hydrolysis affects the bonding performance, and under the condition of the content, due to the chemical action of the content, the adhesion of the polyurethane adhesive decreases faster after cooking, and even delamination

Method used

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  • Polyurethane adhesive containing epoxy-terminated polyether and preparation method
  • Polyurethane adhesive containing epoxy-terminated polyether and preparation method
  • Polyurethane adhesive containing epoxy-terminated polyether and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Polyurethane adhesive component A was synthesized according to the raw material formula shown in Table 1, wherein no epoxy-terminated polyether was added to sample 1, and epoxy-terminated polypropylene glycol was added to sample 2.

[0020] Table 1. Polyurethane Adhesive A Component Formula

[0021]

[0022] The compounded component A and component B (polyurethane prepolymer, provided by Guangzhou King Fine Chemical Co., Ltd.) were used to mix and compound the glue, and the compounded glue was used for mechanical compounding. The compound film structure was PET / Al / RCPP. Matured in an oven at 50°C for 72 hours. After the curing was completed, the films of sample 1 and sample 2 were taken to make packaging bags. At least 2 bags were made for each group. The content was infinite spicy chicken wings produced in Guangdong, with a total mass of 30g. Cook at 125°C for 45 minutes. After cooking, take one kind of packaging bag to test the peel strength. At the same time, put ...

Embodiment 2

[0026] Component A of the polyurethane adhesive was synthesized according to the raw material formula shown in Table 3, and epoxy-terminated polyethylene glycol was added to sample 3.

[0027] Table 3. Polyurethane Adhesive A Component Formulation

[0028]

[0029] The specific implementation method is the same as in Example 1, and the peel strength test results are shown in Table 4.

[0030] Table 4. Peel Strength Test Results

[0031]

[0032]

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Abstract

The invention discloses a polyurethane adhesive containing epoxy-terminated polyether and a preparation method and belongs to the field of adhesives. The epoxy-terminated polyether adopts such a structure that polyether is taken as a main chain and an epoxy group is taken as a terminal group; the polyether main chain can improve the wettability and the ageing resistance of the polyurethane adhesive; the epoxy group does not participate in a reaction of the polyurethane adhesive at the normal temperature, when the polyurethane adhesive is hydrolyzed through boiling at the high temperature of higher than 100 DEG C, the epoxy group can react with a hydroxyl group or a carboxyl group after hydrolysis of the polyurethane adhesive, reduction of the crosslinking degree of the adhesive is relieved, the high-temperature resistance of the polyurethane adhesive is improved, and a composite film can be prevented from losing the adhesive property when being boiled at the high temperature under the condition that the content is contained.

Description

technical field [0001] The invention relates to a polyurethane adhesive containing epoxy-terminated polyether and a preparation method thereof, belonging to the field of adhesives. Background technique [0002] With the development of the food industry, people have higher and higher requirements for polyurethane adhesives for composite films. From the perspective of food safety, most food flexible packaging must be sterilized at high temperature with the contents in it. The sterilization temperature is Between 100°C and 135°C, this requires polyurethane adhesives for composite films to have certain high temperature resistance and chemical resistance. As we all know, ordinary polyurethane adhesives have poor temperature resistance, and carbamate groups are prone to occur Hydrolysis affects the bonding performance, and under the condition of the content, due to the chemical action of the content, the adhesion of the polyurethane adhesive decreases faster after cooking, and eve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J175/06C09J171/08C08G18/42
Inventor 陈宇蒋海成于昊宇张群许弟韩航崔正李明
Owner 广东国望精细化学品有限公司
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