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Preparation method of fluorosilicone modified carbamido compound

A technology of fluorine-silicon modification and compound, which is applied in the field of preparation of urea-based compounds, can solve the problems of excessive leveling agent selection, increase the amount of leveling agent, and poor water solubility of coatings, so as to avoid crystallization and increase dissolution properties, low surface tension

Active Publication Date: 2019-06-07
广东坚派新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The presence of alkoxy groups in γ-aminopropyltriethoxysilane results in poor water solubility of the coating, excessive surface tension, and nearby coatings automatically spread toward it, thus forming edge thickening and shrinkage cavities Phenomenon, orange peel phenomenon, Bernal swirl, flower and floating color phenomenon, the selection of leveling agent is too demanding, and the amount of leveling agent is also increased

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  • Preparation method of fluorosilicone modified carbamido compound

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preparation example Construction

[0033] The invention discloses a preparation method of a fluorine-silicon modified ureido compound, which comprises the following steps:

[0034] (1) Synthesis of fluorosilicone adducts: add γ-aminopropyltrialkoxysilane into the reaction kettle and pass nitrogen gas for 8-10 minutes, then raise the temperature to 30-60°C, start stirring and maintain the stirring speed 500-900r / min, add the ternary mixture of hexafluoropropylene dimer, hexafluoropropylene trimer and dialkyl maleate dropwise into the reaction kettle, and keep the exothermic temperature of the reaction after the dropwise addition Continue to react for 12-24h to obtain fluorosilicone adduct;

[0035] (2) Preparation of fluorine-silicon modified urea-based compounds: Cool the above-mentioned fluorosilicone adduct to below 30°C, continue stirring at 500-900r / min, and add isocyanate monomer or isocyanate prepolymer dropwise , add dropwise according to the NH / NCO molar ratio of 1:1, the drop rate is 1-2 drops / S, the ...

Embodiment 1

[0047] The invention discloses a preparation method of a fluorine-silicon modified ureido compound, which comprises the following steps:

[0048] (1) Synthesis of fluorosiloxane adducts: add γ-aminopropyltrialkoxysilane into the reaction kettle and pass nitrogen gas for 10 minutes, then raise the temperature to 45°C, start stirring and maintain the stirring speed at 500r / min , add the ternary mixture of hexafluoropropylene dimer, hexafluoropropylene trimer and dialkyl maleate dropwise into the reaction kettle, keep the exothermic temperature of the reaction and continue the reaction for 24h after the dropwise addition, to obtain fluorine Siloxane adducts;

[0049] (2) Preparation of fluorine-silicon modified urea-based compounds: Cool the above-mentioned fluorosiloxane adduct to below 30°C, continue stirring at 700r / min, add isocyanate monomer or isocyanate prepolymer dropwise, press NH / NCO molar ratio of 1:1 is added dropwise, the drop rate is 1-2 drops / S, the dropwise addit...

Embodiment 2

[0054] The invention discloses a preparation method of a fluorine-silicon modified ureido compound, which comprises the following steps:

[0055] (1) Synthesis of fluorosiloxane adducts: add γ-aminopropyltrialkoxysilane into the reaction kettle and pass nitrogen gas for 9 minutes, then raise the temperature to 30°C, start stirring and maintain the stirring speed at 900r / min , add the ternary mixture of hexafluoropropylene dimer, hexafluoropropylene trimer and dialkyl maleate dropwise into the reaction kettle, keep the exothermic temperature of the reaction and continue the reaction for 18h after the dropwise addition, to obtain fluorine Siloxane adducts;

[0056] (2) Preparation of fluorine-silicon modified urea-based compounds: Cool the above-mentioned fluorosiloxane adduct to below 30°C, continue stirring at 500r / min, add isocyanate monomer or isocyanate prepolymer dropwise, press NH / NCO molar ratio of 1:1 is added dropwise, the drop rate is 1-2 drops / S, the dropwise additi...

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Abstract

The invention discloses a preparation method of a fluorosilicone modified carbamido compound. The preparation method comprises following steps: (1) synthesizing fluorosilicone; (2) preparing a fluorosilicone modified carbamido compound; (3) refining the finished product; and (4) diluting and cooling: adding a proper weight of a DMF solvent into the finished product obtained in the step (3) under astirring speed of 500-900 r / min, cooling to the room temperature, measuring, and obtaining the high purity fluorosilicone modified carbamido compound. The provided preparation method has the characteristics of simple technology, good solubility, stable performance, and wide application range.

Description

technical field [0001] The invention relates to the technical field of waterproof coatings or environmental protection coatings, in particular to a preparation method of fluorine-silicon modified urea-based compounds. Background technique [0002] Polyaspartic ester coating is an aliphatic, slow response, high weather resistance and high performance coating developed in the field of polyurea in recent years, known as the third generation of polyurea. Compared with traditional polyurethane coatings, its main resin, polyaspartic acid ester, is secondary aminodiamine, which has a faster reaction speed, is easy to achieve thick coating, reduces construction time and times, and has excellent performance; at the same time, it has high solid and low viscosity Especially suitable for the production of solvent-based environmentally friendly coatings. It can reduce the harm to the human body and has good environmental protection performance. [0003] Waterproof materials mainly refe...

Claims

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Application Information

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IPC IPC(8): C08G18/38C08G18/67C08G18/30C09D175/02C09D5/16C09D5/08
Inventor 张余英吴建华谭绍早张振宝黄浪欢熊永强蔡祥吴婷
Owner 广东坚派新材料有限公司
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