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Preparation method of high-bonding waterborne polyurethane resin applied to PET film

A water-based polyurethane and high-adhesion technology, which is applied in the field of water-based polyurethane, can solve the problems of poor cohesion and adhesion of water-based polyurethane, achieve high adhesion, high cohesion, and solve the effect of adhesion and adhesion problems

Inactive Publication Date: 2016-09-28
ANHUI SINOGRACE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used on the surface of PET materials without corona treatment, the cohesive force and adhesion of water-based polyurethane are poor, which limits the application of water-based polyurethane on PET materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The preparation method of high bonding waterborne polyurethane resin for PET film comprises the following steps:

[0013] (1) Dissolve 30 mol of isophorone diisocyanate, 5 mol of polyester diol with a molecular weight of 2000-2500, 10 mol of polyether diol and 1 mol of fluorine-containing diol in 25 mol of acetone, and heat up to After reacting for 3 hours at 70 ℃, the prepolymer was obtained;

[0014] (2) Raise the temperature of the prepolymerization obtained in step (1) to 75 °C, then add 2 mol dimethylolpropionic acid and 2 mol ethylene glycol, and extend the chain reaction for 0.5 h;

[0015] (3) After cooling down to room temperature, add 2 mol of triethylamine under high-speed stirring, add water to emulsify, and distill off acetone under reduced pressure to obtain a high-bond water-based polyurethane resin for PET.

Embodiment 2

[0017] The preparation method of high bonding waterborne polyurethane resin for PET film comprises the following steps:

[0018] (1) Dissolve 40 mol of hexamethylene diisocyanate, 10 mol of polyester diol with a molecular weight of 2000-2500, 5 mol of polyether diol and 3 mol of fluorine-containing polyether diol in 30 mol of acetone, heat up To 90 ℃, after 1.5 h of reaction, the prepolymer was obtained;

[0019] (2) Cool down the prepolymer obtained in step (1) to 70 °C, then add 5 mol dimethylolpropionic acid and 1 mol ethylene glycol, and perform chain extension reaction for 1.0 h;

[0020] (3) After cooling down to room temperature, add 5 mol of triethylamine under high-speed stirring, add water to emulsify, and distill off acetone under reduced pressure to obtain a high-bond water-based polyurethane resin for PET.

Embodiment 3

[0022] The preparation method of high bonding waterborne polyurethane resin for PET film comprises the following steps:

[0023] (1) Dissolve 45 mol of isophorone diisocyanate, 5 mol of polyester diol with a molecular weight of 2000-2500, 10 mol of polyether diol and 5 mol of perfluoroalkyl alcohol in 40 mol of acetone, and heat up to After reacting for 2.5 h at 75 ℃, the prepolymer was obtained;

[0024] (2) Cool down the prepolymerization obtained in step (1) to 75 °C, then add 3 mol dimethylolpropionic acid and 5 mol ethylene glycol, and perform chain extension reaction for 1 h;

[0025] (3) After cooling down to room temperature, add 3 mol triethylamine under high-speed stirring, add water to emulsify, and distill off acetone under reduced pressure to obtain a high-bonding water-based polyurethane resin for PET film.

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Abstract

A preparation method of high-bonding waterborne polyurethane resin applied to a PET film comprises the steps of dissolving 30-45 mole parts of aliphatic isocyanate, 5-10 mole parts of polyester polyol, 5-15 mole parts of polyether polyhydric alcohols and 1-5 mole parts of fluorine-containing polyhydric alcohols into acetone and reacting at a temperature of 70-90 DEG C for 1.5-3h to obtain prepolymer; warming to a temperature of 70-75 DEG C, adding 1-5 mole parts of dimethylol propionic acid and 1-5 mole parts of ethylene glycol, carrying out chain extension for 0.5-1.0h, cooling to a room temperature, adding 2-5 mole parts of triethylamine in high-speed stirring, adding water to emulsify, reducing pressure and distilling to remove the acetone, thus obtaining the high-bonding waterborne polyurethane resin applied to the PET. A fluorine functional group is introduced into the waterborne polyurethane resin, so that the attachment of the waterborne polyurethane resin and that of the PET film are improved. When being applied to the surface of the PET film material, the high-bonding waterborne polyurethane resin has the advantages of being free of toxicity, good in film forming property, high in bonding force, high in attachment and the like; furthermore, the high-bonding waterborne polyurethane resin successfully solves the problem of difficulty in realizing bonding attachment of waterborne polyurethane ink and waterborne polyurethane glue on the PET film.

Description

technical field [0001] The invention belongs to the technical field of water-based polyurethane, in particular to a method for preparing a high-bond water-based polyurethane resin for PET films. Background technique [0002] PET polyester film is increasingly used because of its excellent temperature resistance, durability, solvent resistance and high transparency. However, PET film is a non-absorbent printing material with relatively low surface tension, and inks and adhesives often cannot be effectively combined with PET substrates, which may easily cause deinking or degumming, affecting product quality. Although corona treatment can increase the surface tension of PET films, the surface tension stability of corona-treated materials is poor, and some PET films cannot be treated with corona. Therefore, the packaging and printing industries have been looking for an efficient and stable PET film surface adhesion solution. At the same time, with the increasing public demand ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/73C08G18/75C08G18/66C08G18/42C08G18/48C08G18/50C08G18/12C08G18/34C08G18/32C09D11/102C09J175/06C09J175/08
CPCC08G18/12C08G18/0823C08G18/4018C08G18/5015C08G18/66C08G18/73C08G18/755C09D11/102C09J175/06C09J175/08C08G18/348C08G18/3206
Inventor 刘都宝陶杰刘藏鲍俊杰赵洪涛
Owner ANHUI SINOGRACE CHEM
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