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Nonionic hydrophilic monomer for synthesis of waterborne polyurethane and synthetic method thereof

A non-ionic hydrophilic, water-based polyurethane technology, applied in the polymer field, to facilitate large-scale industrial production, avoid emulsion breaking, and easily obtain raw materials

Inactive Publication Date: 2012-10-24
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of dispersion stability and matching application of non-ionic water-based polyurethane emulsion, the invention provides a non-ionic hydrophilic monomer for water-based polyurethane synthesis and its synthesis method. On the main chain structure of polyurethane molecules, the side group has a hydrophilic monomer with a relatively long non-ionic group

Method used

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  • Nonionic hydrophilic monomer for synthesis of waterborne polyurethane and synthetic method thereof
  • Nonionic hydrophilic monomer for synthesis of waterborne polyurethane and synthetic method thereof
  • Nonionic hydrophilic monomer for synthesis of waterborne polyurethane and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve 1mol of 2,2-dimethylolpropionic acid in 500ml of acetone, and dissolve 0.1mol of p-toluenesulfonic acid and 1.2mol of 2,2-dimethoxypropane in acetone. The above solution was put into a three-necked flask, filled with nitrogen for 30 minutes, and reacted at 60° C. for 12 hours. The reaction product was filtered out through a silica gel column, dried under vacuum for 12 hours, and the solvent was fully evaporated to obtain 170 g of the product.

[0023] Add 1700g of N,N'-dicyclohexylcarbodiimide to a three-necked flask, dissolve 170g of the above product in it, then add 0.1mol of 4-dimethylaminopyridine, and then add 1500g of polyethylene glycol monomethanol with a molecular weight of 1000 Ether, the esterification reaction is carried out at 120°C. After reacting for 6 hours, the product was filtered out through a silica gel column and dried for 12 hours to obtain 1660 g of an esterified product.

[0024] Add 840g of 37% hydrochloric acid and 840g of methanol i...

Embodiment 2

[0027] Dissolve 1.2mol of 2,2-dimethylolpropionic acid in 500ml of acetone, and dissolve 0.12mol of p-toluenesulfonic acid and 2mol of 2,2-dimethoxypropane in acetone. The above solution was put into a three-necked flask, filled with nitrogen for 30 minutes, and reacted at 60° C. for 10 hours. The reaction product was filtered out through a silica gel column, dried under vacuum for 12 hours, and the solvent was fully evaporated to obtain 204 g of the product.

[0028] Add 2000g of N,N'-dicyclohexylcarbodiimide to a three-necked flask, dissolve 204g of the above product in it, then add 0.12mol of 4-dimethylaminopyridine, and then add 1800g of polyethylene glycol monomethyl ether with a molecular weight of 1000 , The esterification reaction was carried out at 130°C. After reacting for 6 hours, the product was filtered out through a silica gel column and dried for 12 hours to obtain 2000 g of the esterified product.

[0029] Add 1000g of 37% concentrated hydrochloric acid and 1...

Embodiment 3

[0031] Dissolve 2mol 2,2-dimethylolpropionic acid in 1000ml dimethylformamide, and dissolve 0.2mol p-toluenesulfonic acid and 3mol 2,2-dimethoxypropane in dimethylformamide amides. The above solution was put into a three-necked flask, filled with nitrogen for 30 minutes, and reacted at 60° C. for 10 hours. The reaction product was filtered out through a silica gel column, dried under vacuum for 12 hours, and the solvent was fully evaporated to obtain 337 g of the product.

[0032] Add 3200g of N,N'-dicyclohexylcarbodiimide to a three-necked flask, dissolve 337g of the above product in it, then add 0.2mol of 4-dimethylaminopyridine, and then add 2700g of polyethylene glycol monomethyl ether with a molecular weight of 1000 , The esterification reaction was carried out at 130°C. After reacting for 6 hours, the product was filtered out through a silica gel column and dried for 12 hours to obtain 3000 g of an esterified product.

[0033] Add 2000g of 37% concentrated hydrochlori...

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Abstract

The invention discloses a nonionic hydrophilic monomer for synthesis of a waterborne polyurethane and a synthetic method thereof. The method provided by the invention comprises steps of: firstly utilizing 2, 2-dimethoxy propane to protect two hydroxy groups of 2, 2-dimethylolpropionic acid; reacting a product treated with hydroxy protection with polyethylene glycol monomethyl ether with a molecular weight of 1000-2000 for an esterification reaction; and further conducting dehydroxylation protection on an esterification product to generate a final product of the nonionic hydrophilic monomer with two hydroxyl groups on a chain segment and an ether bond on the other end. The monomer can be grafted to a main-chain structure of a waterborne polyurethane molecule; stability of a waterborne polyurethane emulsion prepared by modification by the monomer is greatly improved compared with that of a traditional block type nonionic waterborne polyurethane emulsion; besides, the waterborne polyurethane emulsion can avoid a problem of emulsion breaking in matching with other anionic or cationic auxiliaries. Raw materials for preparation of the functional monomer provided by the invention are easily available and low-cost; and the preparation process is simple, high-yield, and convenient for industrialized production.

Description

technical field [0001] The invention relates to a non-ionic hydrophilic monomer for synthesizing waterborne polyurethane and a synthesis method thereof, belonging to the technical field of macromolecules. Background technique [0002] Waterborne polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium. Water-based polyurethane uses water as a dispersant, which has the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification. It can be widely used in coatings, adhesives, fabric coating and finishing agents, leather finishing agents, paper surface treatment agents and fiber surface treatment agents. [0003] During the synthesis of waterborne polyurethane, it is necessary to add hydrophilic monomers, blocks or grafted on polyurethane molecules to realize the uniform dispersion of waterborne polyurethane latex particles in the emulsification proce...

Claims

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Application Information

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IPC IPC(8): C08G65/00C08G18/48
Inventor 李冰彭丹律微波赵宁李金辉
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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