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Modified carbon dioxide-based waterborne polyurethane and preparation method thereof

A technology of water-based polyurethane and carbon dioxide, applied in the field of polyurethane, can solve problems such as poor water resistance, poor heat resistance, and difficulty in meeting market requirements

Inactive Publication Date: 2017-07-25
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional water-based polyurethane emulsion has disadvantages such as poor water resistance and heat resistance, and it is difficult to meet market requirements

Method used

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  • Modified carbon dioxide-based waterborne polyurethane and preparation method thereof
  • Modified carbon dioxide-based waterborne polyurethane and preparation method thereof
  • Modified carbon dioxide-based waterborne polyurethane and preparation method thereof

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preparation example Construction

[0044] The present invention also provides the preparation method of above-mentioned modified carbon dioxide-based water-based polyurethane, comprising the following steps:

[0045] A) reacting low-molecular-weight dibasic alcohols with diisocyanates to obtain the first product;

[0046] B) reacting the first product with a hydrophilic chain extender to obtain a second product;

[0047] C) reacting the second product with butanediol to obtain a third product;

[0048] D) performing alkali neutralization, deionized water emulsification, and solvent removal on the third product in sequence to obtain the modified carbon dioxide-based waterborne polyurethane;

[0049] Described low molecular weight dihydric alcohol has the structure shown in formula (2-I):

[0050]

[0051] In formula (2-I), m is preferably 1-30, more preferably 10-25; n is preferably 1-35, more preferably 5-30;

[0052] The diisocyanate is preferably any one of toluene diisocyanate, diphenylmethane diisocya...

Embodiment 1

[0075] According to the method disclosed in Example 9 of the patent 201210086834.X, a carbon dioxide-based diol with a number average molecular weight of 2000 Daltons was prepared.

[0076] Add 100 grams of prepared carbon dioxide-based diols with a molecular weight of 2000 Daltons into a four-neck flask, heat to 110°C, dehydrate at -0.98MPa for 1 hour, cool down to 75°C, and add 150 grams of Butanone and 50 grams of diphenylmethane diisocyanate, add 0.0025 grams of dibutyltin dilaurate catalyst dropwise, react for 2 hours, then add 5 grams of dimethylol butyric acid and 11.9 grams of 9,10-dihydroxystearic acid to react Add 26 grams of butanediol after 1 hour, react for 2 hours, add 3.16 grams of sodium hydroxide to neutralize the pH to 7, then add 210 grams of deionized water, stir at 1200 rpm for 1 hour, remove butanone under reduced pressure, and obtain carbon dioxide Modified waterborne polyurethane resin.

[0077] Infrared detection is carried out to the aqueous polyuret...

Embodiment 2

[0079] According to the method disclosed in Example 8 of the patent 201210086834.X, a carbon dioxide-based diol with a number average molecular weight of 2800 Daltons was prepared.

[0080] Add 168 grams of prepared carbon dioxide-based diols with a molecular weight of 2800 Daltons into a four-neck flask, heat to 110°C, dehydrate at -0.98MPa for 1 hour, cool down to 72°C, and add 150 grams of Butanone and 41.8 grams of toluene diisocyanate, dropwise added 0.0010 grams of dibutyltin dilaurate catalyst, reacted for 2 hours, then added 9 grams of dimethylol butyric acid and 7.08 grams of 9,10-dihydroxystearic acid, after adding React for 1 hour, then 7.8 grams of butanediol, react for 2 hours, add 9 grams of triethylamine to neutralize the pH to 7, then add 230 grams of deionized water, stir at 1200 rpm for 1 hour, remove butanone under reduced pressure, and obtain carbon dioxide Modified waterborne polyurethane resin.

[0081] Infrared detection is carried out to the aqueous po...

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Abstract

The invention provides modified carbon dioxide-based waterborne polyurethane, which has a structure as shown in a formula (I). Carbon dioxide and epoxypropane are copolymerized so as to prepare carbon dioxide-based polyatomic alcohol, and 9,10-dioxystearic acid and dimethylolbutanoic acid are matched jointly as a hydrophilic group chain segment, so that not only the dependence on petrifaction resources be reduced, but also compared with traditional waterborne polyurethane prepared from polyester polyatomic alcohol and polyether polyol, the modified carbon dioxide-based waterborne polyurethane has excellent water resistance and mechanical property. The formula (I) is shown in the specification.

Description

technical field [0001] The invention relates to the technical field of polyurethane, in particular to a modified carbon dioxide-based waterborne polyurethane and a preparation method thereof. Background technique [0002] Polyurethane materials with superior performance have been widely used in many fields of national economic development. Most of the raw materials for the preparation of polyurethane come from the petrochemical industry. With the development and progress of society, the petroleum resources that support the development of the world economy are increasingly exhausted. The preparation and use of raw materials from petrochemical resources will also cause environmental pollution. In addition, due to the implementation of environmental laws and regulations and the enhancement of people's awareness of environmental protection, the application of solvent-based polyurethane is also limited. It is particularly important to seek petroleum substitutes, develop new mate...

Claims

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Application Information

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IPC IPC(8): C08G18/44C08G18/48C08G18/34C08G18/32C08G18/66C08G18/10C08G18/76C08G18/75
CPCC08G18/0823C08G18/10C08G18/44C08G18/4825C08G18/6659C08G18/6692C08G18/755C08G18/7614C08G18/7671C08G18/348C08G18/3206
Inventor 李颖张亚明张红明王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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