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Synthesis method of water-based asparaginous polyurea and application of water-based asparaginous polyurea in sealant

A synthesis method and water-based technology, applied in the field of synthesis of water-based aspartame polyurea, can solve the problems of difficulty in taking into account adhesion, durability and environmental protection performance, no water erasable function, unfavorable cleaning treatment, etc., and achieve high performance. The effect of abrasion resistance, promotion of improvement, promotion of cross-linking density

Active Publication Date: 2021-01-22
SHENZHEN FEIYANG JUNYAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This water-insoluble polymer has the advantages of good adhesion, high strength, smooth surface, etc., but it is easy to crack, not environmentally friendly, does not have the function of water erasability, and is not conducive to subsequent cleaning and other problems.
The existing commercially available ceramic tile epoxy grouting agents are often difficult to balance adhesion, durability and environmental performance

Method used

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  • Synthesis method of water-based asparaginous polyurea and application of water-based asparaginous polyurea in sealant
  • Synthesis method of water-based asparaginous polyurea and application of water-based asparaginous polyurea in sealant
  • Synthesis method of water-based asparaginous polyurea and application of water-based asparaginous polyurea in sealant

Examples

Experimental program
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preparation example Construction

[0042] First aspect of the present invention provides a kind of synthetic method of waterborne aspartame, comprises the following steps:

[0043] Under nitrogen atmosphere, mix aspartic acid ester resin F and diisocyanate, add chain extender and solvent to mix, then add water-based aspartic acid ester resin N, after stirring, add water to emulsify, obtain water-based aspartic polyurea Emulsion; further, under nitrogen atmosphere, mix aspartic acid ester resin F and diisocyanate for 4-8 minutes, add chain extender and solvent and mix for 4-8 minutes, then add water-based aspartic acid ester resin N, stir for 8 minutes ~15 minutes later, add water to emulsify for 4~8 minutes to obtain water-based aspartame emulsion.

[0044]The applicant found that by first adding common aspartic acid ester resin F and diisocyanate, chain extender, etc. to react for a period of time, adding water-based aspartic acid ester resin with sulfonate, the polyurea resin main chain When emulsifying with...

Embodiment 1

[0104] This example provides a kind of synthetic method of water-based aspartame, comprising the following steps:

[0105] (1) Add diethyl maleate dropwise to diamine A, react at 40°C to obtain intermediate M, and the molar ratio of diethyl maleate to diamine A is 1:1;

[0106] (2) Add intermediate M to acetone, and add sodium vinylsulfonate dropwise to react at 40°C to obtain aqueous aspartate resin N;

[0107] (3) Under nitrogen atmosphere, mix aspartic acid ester resin F and diisocyanate for 5 minutes, add chain extender and solvent and mix for 5 minutes, then add water-based aspartic acid ester resin N, stir for 10 minutes, add water to emulsify for 5 minutes , to obtain aqueous aspartic polyurea emulsion; the molar ratio of the aspartic acid ester resin F, aqueous aspartic acid ester resin N, diisocyanate and chain extender is 1:0.1:1.2:1, and the water accounts for 5wt% of aqueous aspart polyurea emulsion.

[0108] The structural formula of the diamine A is as follows:...

Embodiment 2

[0119] This example provides a kind of synthetic method of water-based aspartame, comprising the following steps:

[0120] (1) Add diethyl maleate dropwise to diamine A, react at 40°C to obtain intermediate M, and the molar ratio of diethyl maleate to diamine A is 1:1;

[0121] (2) Add intermediate M to acetone, and dropwise add sodium vinyl sulfonate, and react at 45°C to obtain aqueous aspartate resin N;

[0122] (3) Under nitrogen atmosphere, mix aspartic acid ester resin F and diisocyanate for 5 minutes, add chain extender and solvent and mix for 5 minutes, then add water-based aspartic acid ester resin N, stir for 10 minutes, add water to emulsify for 5 minutes , to obtain aqueous aspartic polyurea emulsion; the molar ratio of the aspartic acid ester resin F, aqueous aspartic acid ester resin N, diisocyanate and chain extender is 1:0.1:1.2:1, and the water accounts for 15 wt% of aqueous aspart polyurea emulsion.

[0123] The structural formula of the diamine A is as fol...

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Abstract

The invention relates to synthesis of asparaginous polyurea, in particular to a synthesis method of the water-based asparaginous polyurea and application of the water-based asparaginous polyurea in asealant. The invention provides a synthesis method of water-based asparaginous polyurea. When the obtained water-based asparaginous polyurea emulsion is used as a sealant, compared with an epoxy or polyurethane sealant, the water-based asparaginous polyurea emulsion has high wear resistance, scratch resistance and tensile property; and the applicant finds that the water-based asparaginous polyureaemulsion has good water resistance by grafting sulfonate onto asparaginous resin and reacting with diisocyanate and a chain extender. Compared with the method applied by a directly used sulfonated chain extender, the method provided by the invention is more beneficial to the formation of small emulsified particles and the promotion of the improvement of crosslinking density, so that the resistance to water, acid, alkali and the like is improved, the phenomena of shrinkage and the like are avoided when the water-based asparaginous polyurea is used for caulking, the good appearance is maintained, and the water-based asparaginous polyurea has high adhesion and durability.

Description

technical field [0001] The present invention relates to the synthesis of aspartoid polyurea, more specifically, the present invention relates to a synthetic method of water-based aspartaginous polyurea and its application in beautifying joint agent. Background technique [0002] Modern buildings use ceramic tiles, mosaics, colored sand bricks and other materials to be widely used in the field of architectural decoration. These materials need to leave gaps between each piece of material and corners when laying. White cement has the advantages of simple construction and low cost, and it is the first material used for beautifying joints. However, its durability is poor, and it is prone to chalking and blackening over time, and there are deficiencies in environmental protection and hygiene, and the overall performance is poor. [0003] With the development of technology, oil-based two-component beautifying agent has gradually replaced white cement for filling. The oil-based t...

Claims

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Application Information

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IPC IPC(8): C08G18/65C08G18/64C08G18/32
CPCC08G18/6529C08G18/6415C08G18/3857
Inventor 熊东路李斌仁鲁晓东陈林生龙绪俭徐涛杨轩肖增钧许超平
Owner SHENZHEN FEIYANG JUNYAN TECH DEV
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