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High-solid, low-viscosity, high-temperature cooking-resistant polyurethane adhesive composition and preparation method thereof

A polyurethane adhesive, high-solid low-viscosity technology, used in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problems of high viscosity and low solid content, and achieve low viscosity and solid content. High, good printing adaptability

Active Publication Date: 2016-08-10
CHANGZHOU HUAKE POLYMERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a high-solid, low-viscosity, high-temperature cooking-resistant polyurethane adhesive composition and its preparation method in order to overcome the shortcomings of low solid content and high viscosity of existing high-temperature cooking-resistant adhesives

Method used

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  • High-solid, low-viscosity, high-temperature cooking-resistant polyurethane adhesive composition and preparation method thereof
  • High-solid, low-viscosity, high-temperature cooking-resistant polyurethane adhesive composition and preparation method thereof
  • High-solid, low-viscosity, high-temperature cooking-resistant polyurethane adhesive composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0025] Preparation Example 1 (A sample) of high-solid, low-viscosity, high-temperature cooking-resistant polyurethane adhesive:

[0026] Synthesize a high-solid, low-viscosity high-temperature cooking-resistant polyurethane adhesive according to the following raw material formula and preparation method.

[0027] The formula is:

[0028] raw material name

Weight / g

Terephthalic acid

30

sebacic acid

26

Trimethylolpropane

15

Diethylene glycol

23

Neopentyl glycol

20

Toluene diisocyanate

8

Epoxy resin HyPox UA10

9

coupling agent

1.5

[0029] The preparation method steps are as follows:

[0030] ①Esterification process:

[0031] Add the polybasic acid and polyol into the reaction kettle, raise the temperature to 220°C, react for 2.5 hours, and the esterification is completed;

[0032] ② Polycondensation process:

[0033] Vacuumize the polymerization kettle after the above-mentioned...

Embodiment 2

[0040] Preparation Example 1 (B sample) of high-solid and low-viscosity high-temperature cooking-resistant polyurethane adhesive:

[0041] Synthesize a high-solid, low-viscosity high-temperature cooking-resistant polyurethane adhesive according to the following raw material formula and preparation method.

[0042] The formula is:

[0043] raw material name

[0044] Put terephthalic acid, sebacic acid, trimethylolpropane, diethylene glycol, neopentyl glycol and catalysts into a device with heating and stirring in proportion, pass in nitrogen protection, stir to raise the temperature, and control the distillation Head temperature and reaction temperature, complete esterification after reaction. Afterwards, the reaction kettle is vacuumed, and the temperature of the reaction kettle is controlled between 240 and 260°C during vacuuming. Under the condition of vacuuming, the polycondensation reaction of acid and alcohol is completed to obtain hydroxyl-terminated polyester...

preparation Embodiment 2

[0046] Preparation Example 2 (C sample) of high-solid and low-viscosity high-temperature cooking-resistant polyurethane adhesive:

[0047] raw material name

[0048] The steps of the preparation method are the same as in Example 1.

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Abstract

The invention relates to a high-solid content low-viscosity thermophilic digestion-resistant polyurethane adhesive composition and a preparation method thereof. The composition comprises, by mass, 20-40% of polyprotic acid, 25-35% of polyol, 3-8% of isocyanate, 3-8% of polyurethane-modified epoxy resin and 1-2% of a silane coupling agent. Through improvement of a synthesis technology and a formula, the preparation method of the high-solid content low-viscosity thermophilic digestion-resistant polyurethane adhesive composition is obtained. The high-solid low-viscosity thermophilic digestion-resistant polyurethane adhesive composition further improves high temperature and damp-heat resistance and solid content, reduces viscosity, satisfies high-speed production requirements and reduces VOC discharge. The high-solid content low-viscosity thermophilic digestion-resistant polyurethane adhesive composition has good printing adaptability, can resist thermophilic digestion at a temperature of 145 DEG C, and has good content resistance and high combined strength.

Description

technical field [0001] The invention relates to a polyurethane adhesive, in particular to a high-solid, low-viscosity high-temperature cooking-resistant polyurethane adhesive composition and a preparation method thereof. Background technique [0002] Flexible packaging composite glue is mainly used in the manufacture of packaging bags for food, medicine, cosmetics, washing supplies, etc., especially for food flexible packaging. Its materials mainly include polyurethane, acrylic acid, etc., and polyurethane adhesive has become the first choice adhesive for composite packaging due to its excellent comprehensive performance. More than 90% of food composite packaging at home and abroad use this type of glue. According to expert estimates, the global average annual growth rate of adhesives for food composite packaging bags will be 10% in the next five years, and my country may grow at a rate of 15%. Composite packaging bags are divided into three types: ordinary packaging, boili...

Claims

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Application Information

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IPC IPC(8): C09J175/06C08G18/66C08G18/58C08G18/42C08G63/672C08G63/85
Inventor 陈方陈峰顾浩
Owner CHANGZHOU HUAKE POLYMERS
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