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A kind of food or pharmaceutical packaging laminated composite water-based polyurethane and preparation method thereof

A water-based polyurethane, packaging layer technology, applied in the direction of adhesive additives, non-polymer adhesive additives, etc., can solve the problems of poor leveling, high content of easy oxides, poor yellowing resistance, etc., and achieve good anti-stick performance. , low easy oxide, good water resistance effect

Active Publication Date: 2016-08-31
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problems of solvent-based polyurethane adhesives such as high toxicity, flammability, poor use safety, and environmental pollution, as well as water-based polyurethane adhesives with low solid content, high viscosity, easy anti-sticking, poor water resistance, and poor leveling. , poor yellowing resistance, high content of easy oxides, etc., and a food or drug packaging laminated composite water-based polyurethane for food or drug laminated packaging is proposed. Another purpose of the present invention is to provide the above food or drug Preparation method of packaging lamination composite water-based polyurethane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In a reactor equipped with a stirrer, a thermometer, and a reflux condenser, add 40 g of polyester polyol (Zhejiang Huafon New Materials Co., Ltd., PA-1225P), vacuumize and dehydrate at 100°C for 2 hours, cool down to 30°C and add 5g of isophorone diisocyanate, 6g of 1,6-hexamethylene diisocyanate, heat up to 70°C, react for 2h, add 1.3g of dimethylolbutyric acid, 1.3g of trimethylolpropane, 0.03g of dibutyltin dilaurate , continued to react for 4 hours under stirring to obtain a prepolymer. During the reaction, the viscosity of the reactant was controlled at 4000±100mPa.s by adding acetone, then the temperature was lowered to 30°C, and 0.75g of triethylamine was added to neutralize the prepolymer into a Salt; discharge the material into the disperser, add 0.14g ethylenediamine for chain extension reaction for 30 minutes, add 90g deionized water under high-speed shearing, and finally steam the acetone to obtain the aqueous polyurethane dispersion; heat up to 70°C, Add 5...

Embodiment 2

[0025] In a reactor equipped with a stirrer, a thermometer, and a reflux condenser, add 40 g of polyester polyol (Shandong Huacheng Hi-Tech Adhesive Co., Ltd., AD-60), vacuum dehydrate at 105°C for 1.5h, cool down to 40°C and add 16g of dicyclohexylmethane diisocyanate, heated up to 75°C, reacted for 1.5h, added 2.3g of dimethylolpropionic acid, 0.6g of glycerin, 0.1g of stannous octoate, and continued to react for 3h under stirring to obtain a prepolymer. During the reaction process, the viscosity of the reactant is controlled at 4000±300mPa.s by adding acetone, then the temperature is lowered to 40°C, and 1.7g triethylamine is added to neutralize the prepolymer to form a salt; the material is discharged into a disperser, and 0.9g di Ethylenetriamine chain extension reaction for 20 minutes, add 145g of deionized water under high-speed shearing, and finally distill off acetone to obtain a water-based polyurethane dispersion; raise the temperature to 75°C, add 62g of styrene and...

Embodiment 3

[0027]Add 40 g of polyester polyol (Zhejiang Huafon New Material Co., Ltd., PA-1225T) to a reactor equipped with a stirrer, a thermometer, and a reflux condenser, vacuumize and dehydrate at 110°C for 2 hours, cool down to 50°C and add 12g of isophorone diisocyanate, 6g of methylcyclohexyl diisocyanate, heated up to 80°C, reacted for 1h, added 4g of dimethylolpropionic acid, 0.2g of trimethylolpropane, 0.19g of dibutyltin dilaurate, in Continue to react for 2 hours under stirring to obtain a prepolymer. During the reaction, add acetone to control the viscosity of the reactant at 4000±500mPa.s, then lower the temperature to 50°C, and add 3.3g of triethylamine to neutralize the prepolymer to form a salt; Discharge into a disperser, add 1.2g of ethylenediamine for chain extension reaction for 10 minutes, add 220g of deionized water under high-speed shearing, and finally evaporate acetone to obtain a water-based polyurethane dispersion; heat up to 80°C, within 4h Add 100g of acrylo...

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Abstract

The invention relates to a water-based polyurethane for food or medicine packaging lamination and compounding and a preparation method thereof. The food or pharmaceutical packaging lamination composite water-based polyurethane of the present invention is composed of 100 parts by mass of acrylate modified water-based polyurethane dispersion, 0.05-0.25 parts by mass of wetting agent, 0.05-0.2 parts by mass of leveling agent and 0.1-0.2 parts by mass of Compounded with defoamer. The water-based polyurethane has the advantages of high solid content, low viscosity, no anti-sticking, good water resistance, good leveling, good yellowing resistance, low oxidation, etc. It can be used for lamination and compounding of food or pharmaceutical packaging materials, and can also be used Used in water-based paint, wood paint, ink and other fields.

Description

technical field [0001] The invention relates to a water-based polyurethane and a preparation method thereof, in particular to a water-based polyurethane for food or medicine packaging lamination and compounding and a preparation method thereof. Background technique [0002] In recent years, the pressure of public opinion to protect the earth's environment has been increasing day by day. Organic solvents are flammable, explosive, volatile, smelly, and cause air pollution when used. Pharmaceutical packaging products made of solvent-based polyurethane materials have more or less hidden dangers of toxicity. Water-based polyurethane materials use water as the basic medium, and have the advantages of non-combustibility, low odor, no pollution to the environment, energy saving, and convenient operation and processing, and have attracted people's attention. Although my country's current drug packaging industry still mainly uses solvent-based polyurethane materials, it is the genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J11/06C08G18/72C08G18/67C08G18/66C08G18/42C08G18/32C08G18/22C08G18/12
Inventor 项尚林刘超吴新上
Owner NANJING TECH UNIV
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