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Degradable polyurethanes and composites thereof

A polyurethane and polyester diol technology, applied in the field of isocyanate resin composition, can solve the problems of low commercialization, pollution, and immaturity of degradable polyurethane technology, and achieve excellent mechanical properties

Inactive Publication Date: 2018-03-27
ADESSO ADVANCED MATERIALS WUXI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, subject to both price and cost factors, degradable polyurethane is not yet very mature in technology, and the degree of commercialization is low, so solutions are urgently needed to protect the environment from polyurethane waste that cannot be recycled due to current technical limitations pollution caused

Method used

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  • Degradable polyurethanes and composites thereof
  • Degradable polyurethanes and composites thereof
  • Degradable polyurethanes and composites thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1: the synthesis of crosslinking agent I

[0071] Put 296 grams of ammonia solution into the reaction bottle, start stirring, add 32 grams of ammonium chloride, stir to dissolve, then add 50 grams of bis(2-chloroethoxy)methane at room temperature, then heat up to 80 ° C, and stir the reaction After 6 hours, TLC detects the end point of the reaction. After the reaction is completed, most of the solution is concentrated under reduced pressure, and the residual solution is transferred to a reaction bottle. and 300 milliliters of mixed solvents of ethanol (volume ratio 3:1), extract the aqueous phase 3 times, combine the organic phases, dry the organic phases with anhydrous sodium sulfate, filter, wash the filter cake once with a small amount of solvent, and concentrate the filtrate to dryness , to obtain about 20 grams of crosslinking agent I, its total amine value is 5.9 mmol / g.

Embodiment 2

[0072] Embodiment 2: the synthesis of cross-linking agent II

[0073] Put 69.4 grams of ethylenediamine into the reaction bottle, start stirring, add 10 grams of bis(2-chloroethoxy)methane dropwise at room temperature, drop it in about 1 hour, then raise the temperature to 120°C, and stir for 20 hours , TLC detects the end point of the reaction, after the reaction is over, concentrate most of the solution under reduced pressure, transfer the residual solution to the reaction bottle, adjust the pH ≥ 10 with 30% sodium hydroxide solution below 25 ° C, and then use 90 ml of di Extract the aqueous phase 3 times with methyl chloride, combine the organic phases, dry the organic phases with anhydrous sodium sulfate, filter, wash the filter cake once with a small amount of solvent, and concentrate the filtrate to dryness to obtain about 12 grams of crosslinking agent II, whose total amine value 9.7 mmol / g.

Embodiment 3

[0074] Embodiment 3: the synthesis of cross-linking agent III

[0075] Put 500 grams of ammonia solution into the reaction bottle, start stirring, add 1 gram of urotropine, stir to dissolve, then add 50 grams of bis(2‐chloroethoxy)methane at room temperature, then heat up to 80 ° C, stir React for 6 hours, TLC detects the end point of the reaction. After the reaction is over, concentrate most of the solution under reduced pressure, transfer the residual solution to the reaction bottle, and adjust the pH ≥ 10 with 30% sodium hydroxide solution below 25 ° C, and then use 300 milliliters of mixed solvents of chloroform and ethanol (volume ratio 3:1), extract the aqueous phase in 3 times, combine the organic phases, and dry the organic phases with anhydrous sodium sulfate, filter, and the filter cake is washed once with a small amount of solvent, and the filtrate is concentrated to Dry, obtain about 14 grams of crosslinking agent III, its total amine value is 5.2 mmol / g.

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Abstract

Among others, the present invention provides isocyanate resin compositions which include an isocyanate compound containing two or more isocyanate functional groups; a chain extender comprising a degradable diamine and optionally a dihydric alcohol, a polyether diol, a polyester diol, a diamine, a dimercaptan, or a bisphenol; and a cross-linker comprising a degradable polyamine and optionally a trifunctional, tetrafunctional or polyfunctional polyhydric alcohol, polyether polyol, polyester polyol, polyamine, polymercaptan, or polyphenol.

Description

[0001] related application [0002] The priority of this application is US Patent Application Nos. 62 / 156,328 and 62 / 156,278, filed May 3, 2015, the entire contents of which are hereby incorporated by reference as a part of this application. Background of the invention [0003] Polyurethane is a high molecular polymer with repeating urethane chain segments on its main chain, which is a class of synthetic materials with a wide range of uses. Polyurethanes, which are widely used in the field of medical polymer materials, are usually formed by reacting macromolecular diols with excess diisocyanate to form "prepolymers" containing isocyanate end groups, and then adding low molecular weight diols or dibasic Amines are obtained by chain extension reactions. Among them, the macromolecular polyol forms a flexible chain, and the diisocyanate and chain extender form a rigid chain. Taking the commonly used diisocyanate and diol as an example, the reaction can be expressed as follows: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/00C08G18/72C08G18/83C07C217/00
CPCC08G18/6651C08G18/6685C08G18/7614C08G18/7671C08G18/3225C08G18/3228C08G18/3243C08G18/3246C08G18/42C08G18/7621C08J11/16C08K7/06
Inventor 梁波李欣覃兵
Owner ADESSO ADVANCED MATERIALS WUXI CO LTD
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