Polyaspartic acid ester, preparation method thereof and application of polyaspartic acid ester in sealing coating

An aspartate and sealing coating technology, applied in polyurea/polyurethane coatings, fire-retardant coatings, coatings, etc., can solve the problems of decreased flame retardancy, poor sealing performance of coatings, radioactive leakage, etc., and achieve air tightness High performance, increased air leakage resistance, strong flame propagation resistance and air tightness

Active Publication Date: 2021-10-08
T&H NOVEL MATERIALS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that after long-time radiation, the existing coatings have radioactive leakage and flame retardancy decline with use, as well as the problems of poor sealing performance of the coatings, thereby providing a polyaspartic acid Ester and its preparation method and application in sealing coating

Method used

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  • Polyaspartic acid ester, preparation method thereof and application of polyaspartic acid ester in sealing coating
  • Polyaspartic acid ester, preparation method thereof and application of polyaspartic acid ester in sealing coating
  • Polyaspartic acid ester, preparation method thereof and application of polyaspartic acid ester in sealing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example provides a kind of polyaspartate, its raw material includes 2mol 2,4-diamino-3,5-dimethylthiotoluene, 1mol 3,3'-dimethyl-4,4'- Diamino-dicyclohexylmethane and 1.5mol diethyl maleate

[0040] The specific preparation method is as follows:

[0041] 1) Under nitrogen protection, add 2,4-diamino-3,5-dimethylthiotoluene and 3,3'-dimethyl-4,4'-diamino-dicyclohexylmethane into the Speed-adjusting agitator, reflux condensation dehydration equipment, four-necked bottle of thermometer;

[0042] 2) Slowly add diethyl maleate dropwise at room temperature, and control the temperature during the addition process to not be higher than 60°C. The measured diethyl maleate is all dropped in within 2 hours;

[0043] 3) Continue to react at 60°C for 4 hours, then heat to 80°C, and then continue to react for 6 hours, track the progress of the addition reaction during the reaction, and stop when the measured unsaturation value is 6.5-6.8mg / g reaction;

[0044] 4) Distill at ...

Embodiment 2

[0047] This example provides a kind of polyaspartate, its raw material includes 2mol 2,4-diamino-3,5-dimethylthiotoluene, 1mol 3,3'-dimethyl-4,4'- Diamino-dicyclohexylmethane and 1.5mol diethyl maleate

[0048] The specific preparation method is as follows:

[0049] 1) Under nitrogen protection, add 2,4-diamino-3,5-dimethylthiotoluene and 3,3'-dimethyl-4,4'-diamino-dicyclohexylmethane into the Speed-adjusting agitator, reflux condensation dehydration equipment, four-necked bottle of thermometer;

[0050] 2) Slowly add diethyl maleate dropwise at room temperature, and control the temperature during the addition process to not be higher than 60°C. The measured diethyl maleate is all dropped in within 2 hours;

[0051] 3) Continue to react at 60°C for 4 hours, then heat to 80°C, and then continue to react for 6 hours, track the progress of the addition reaction during the reaction, and stop when the measured unsaturation value is 6.5-6.8mg / g reaction;

[0052] 4) Distill at ...

Embodiment 3

[0055] This example provides a kind of polyaspartate, its raw material includes 2mol 2,4-diamino-3,5-dimethylthiotoluene, 1mol 3,3'-dimethyl-4,4'- Diamino-dicyclohexylmethane and 1.5 mol of diethyl maleate.

[0056] The specific preparation method is as follows:

[0057] 1) Under nitrogen protection, add 2,4-diamino-3,5-dimethylthiotoluene and 3,3'-dimethyl-4,4'-diamino-dicyclohexylmethane into the Speed-adjusting agitator, reflux condensation dehydration equipment, four-necked bottle of thermometer;

[0058] 2) Slowly add diethyl maleate dropwise at room temperature, and control the temperature during the addition process to not be higher than 60°C. The measured diethyl maleate is all dropped in within 2 hours;

[0059] 3) Continue to react at 60°C for 4 hours, then heat to 80°C, and then continue to react for 6 hours, track the progress of the addition reaction during the reaction, and stop when the measured unsaturation value is 6.5-6.8mg / g reaction;

[0060] 4) Distil...

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Abstract

The invention discloses a polyaspartic acid ester. The polyaspartic acid ester is prepared by polymerizing a mixture of 2, 4-diamino-3, 5-dimethylthiotoluene and 3, 3 '-dimethyl-4, 4'-diamino-dicyclohexylmethane and diethyl maleate. The invention also discloses a preparation method of the polyaspartic acid ester and a sealing coating taking the polyaspartic acid ester as a raw material. According to the polyaspartic acid ester disclosed by the invention, the toughness and the tensile strength are improved by the 2, 4-diamino-3, 5-dimethylthiotoluene, and meanwhile, a benzene ring structure of the 3, 3 '-dimethyl-4, 4'-diamino-dicyclohexylmethane has an electron activation resisting effect, so that the polyaspartic acid ester has excellent gamma-ray irradiation resistance. The sealing coating disclosed by the invention has flexibility and strength, also has excellent gamma-ray irradiation resistance and shielding barrier property, and can prevent air leakage; and meanwhile, the sealing coating has durability and flame retardance, and still has strong flame propagation resistance after being irradiated for a long time.

Description

technical field [0001] The invention relates to the field of nuclear power protective coatings, in particular to a polyaspartic acid ester, a preparation method thereof and an application in sealing coatings. Background technique [0002] The containment is the most important barrier to isolate the reactor of the nuclear island system from the outside world, and generally consists of a reinforced concrete structure (tube wall) and a steel lining. Due to the porous nature of concrete, the surface of containment concrete needs to be coated as a sealing material to prevent nuclear radiation pollution from leaking from the containment, to avoid long-term exposure of its structure to radiation damage and to easily remove surface nuclear radioactive pollutants. [0003] However, the current sealing coatings used for containment concrete have the following problems: (1) After the material is irradiated, its tensile strength and elastic elongation are not good, and it is prone to cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/00C09D175/02C09D7/61C09D5/18
CPCC08G73/00C09D175/02C09D7/61C09D5/18C08K2003/385C08K2201/008C08K3/38Y02E30/30
Inventor 张武军王书传梁上海陈鸿栅
Owner T&H NOVEL MATERIALS (SUZHOU) CO LTD
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