Water-based polyurethane material with hydrophilic outer layer and hydrophobic inner layer, preparation method and application thereof

A water-based polyurethane, hydrophilic technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of complex chemical synthesis, high cost, difficult to scale production, etc., to achieve the effect of mature technology, energy saving and easy industrialization

Active Publication Date: 2020-09-29
眉山尤博瑞新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method involves complex chemical synthesis, which is expensive and difficult to produce on a large scale

Method used

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  • Water-based polyurethane material with hydrophilic outer layer and hydrophobic inner layer, preparation method and application thereof
  • Water-based polyurethane material with hydrophilic outer layer and hydrophobic inner layer, preparation method and application thereof
  • Water-based polyurethane material with hydrophilic outer layer and hydrophobic inner layer, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Fmoc-Phe-OH and H-Phe-O t Add Bu.HCl to tetrahydrofuran according to the molar ratio of 1.0:1.1, then add triethylamine 1.2 times the molar weight of Fmoc-Phe-OH, and add the molar amount of Fmoc-Phe-OH 1.1 times the amount of composite condensing agent, where N,N'-dicyclohexylcarbodiimide:N-hydroxysuccinimide=1.1:1. React at 0°C for 3h, react at room temperature for 12h, filter to remove insoluble matter, The filtrate was concentrated to dryness by rotary evaporation, dissolved in DCM, washed with 1 mol / L dilute hydrochloric acid, saturated aqueous sodium bicarbonate solution, saturated sodium chloride aqueous solution, and distilled water successively for 3 times, dried over anhydrous sodium sulfate, and rotary evaporated After concentration, it was precipitated with ether to obtain the white powder product Fmoc-Phe-Phe-OtBu. Disperse Fmoc-Phe-Phe-OtBu in DCM, add an equal volume of TFA to remove the tert-butyl ester group under ice-bath conditions, react for 6 hours...

Embodiment 2

[0077] Add Fmoc-Phe-Phe-OH and H-Lys(Boc)-OEt.HCl to chloroform according to the molar ratio of 1.0:1.1, and then add 1.2 times the molar weight of Fmoc-Phe-Phe-OH Triethylamine, ice-bathed to 0°C and then added a compound condensing agent 1.1 times the molar weight of Fmoc-Phe-Phe-OH, wherein N,N'-dicyclohexylcarbodiimide: N-hydroxysuccinate Imide=1.1:1. React at 0°C for 3 hours, react at room temperature for 12 hours, remove insoluble matter by filtration, and spin the filtrate successively with dilute hydrochloric acid with a concentration of 1mol / L, saturated aqueous sodium bicarbonate, saturated aqueous sodium chloride, and distilled water. liquid, washed three times, dried over anhydrous sodium sulfate, concentrated by rotary evaporation, and precipitated with ether to obtain the white powder product Fmoc-Phe-Phe-Lys(Boc)-OEt.HCl. Disperse Fmoc-Phe-Phe-OtBu in DCM, add an equal volume of ethyl acetate saturated with hydrogen chloride under ice bath conditions to remove t...

Embodiment 3

[0079] Add Boc-Lys(Boc)-OH and Fmoc-Phe-Phe-Lys(H)-OEt.HCl to chloroform at a molar ratio of 1.0:1.1: N,N dimethylformamide=100:10 (v:v) In the mixed solvent, add 1.2 times of triethylamine based on the molar amount of Boc-Lys(Boc)-OH, and add the molar amount of Boc-Lys(Boc)-OH after ice bathing to 0°C 1.1 times the composite condensing agent, where N,N'-dicyclohexylcarbodiimide:N-hydroxysuccinimide=1.1:1. Reacted at 0°C for 3h, at room temperature for 12h, filtered to remove insoluble matter, and the filtrate Swirl with dilute hydrochloric acid with a concentration of 1mol / L, saturated aqueous sodium bicarbonate solution, saturated aqueous sodium chloride solution, and distilled water, and wash three times with each separation, dry with anhydrous sodium sulfate, concentrate by rotary evaporation, and precipitate with ether to obtain a white powder. Product Fmoc-Phe-Phe-Lys(Boc-Lys(Boc))-OEt.

[0080] Disperse Fmoc-Phe-Phe-Lys(Boc-Lys(Boc))-OEt in DCM, add an equal volume of...

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Abstract

The invention provides a method for preparing water-based polyurethane with a hydrophilic outer layer and a hydrophobic inner layer. Chain agent I, and chain extension reaction at 20-70°C for 15-120 minutes; under strong stirring, add water for emulsification or add chain extender II while adding water and drop neutralizer for another chain extension reaction for 60-240 minutes , to obtain the water-based polyurethane with a hydrophilic outer layer and a hydrophobic inner layer; the chemical structural formula of the chain extender I is shown in the formula . The invention also provides the water-based polyurethane prepared by the above method and its application in preparing corresponding membrane materials and coating materials. The raw materials of the present invention are safe and non-toxic, and the synthesis method is simple; the obtained material has excellent water resistance and surface hydrophilicity, and has a double-layer structure with a hydrophilic outer layer and a hydrophobic inner layer, and can be used as biological materials for corresponding purposes, marine antifouling materials, etc. .

Description

technical field [0001] The invention belongs to the technical field of water-based polyurethane preparation, and in particular relates to a water-based polyurethane material with a hydrophilic outer layer and a hydrophobic inner layer, a film and a preparation method thereof. Background technique [0002] As a new type of polymer material, polyurethane has been widely used in medical, health, food and other industrial fields due to its good biocompatibility and excellent physical and mechanical properties. With the enhancement of people's awareness of environmental protection and health and hygiene, the development of water-based polyurethane has been promoted. Because water-based polyurethane replaces the traditional polyurethane organic solvent system with water, it is not only non-flammable, non-toxic, and does not pollute the environment, but also saves energy. , easy to process, and its viscosity and flow properties have nothing to do with the molecular weight of polyur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/78C08G18/48C08G18/42C08G18/32C08G18/12C09D175/08
CPCC08G18/12C08G18/4018C08G18/4277C08G18/4825C08G18/78C09D175/08C08G18/3243C08G18/3821C08G18/3831
Inventor 谭鸿张凡军罗锋方浩林贺媛媛李洁华傅强
Owner 眉山尤博瑞新材料有限公司
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