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Modified polyaspartic acid ester polyurea coating and preparation method thereof

A technology of aspartic acid ester and polyurea, which is applied in the field of coatings and can solve problems such as poor adhesion of substrates and poor flexibility at low temperatures

Active Publication Date: 2020-10-20
SICHUAN JUNSHANG ACRYLIC MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the low-temperature flexibility difference that polyaspartate polyurea coating exists, and the bad problem with base material adhesion, propose a kind of modified polyaspartate polyurea coating, by in Introduce silicone unit and epoxy unit into the polyaspartic ester polyurea system for modification, and obtain a new type of polyurea coating with excellent low-temperature flexibility, adhesive strength, weather resistance and mechanical properties

Method used

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  • Modified polyaspartic acid ester polyurea coating and preparation method thereof
  • Modified polyaspartic acid ester polyurea coating and preparation method thereof
  • Modified polyaspartic acid ester polyurea coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Add 170 parts by weight of amino-terminated polyether D2000 into a reaction kettle with nitrogen gas, stir and heat up to 75°C, add 337 parts by weight of dimethyl maleate dropwise into the reaction kettle, and react at a temperature of 80°C After 16 hours, cool to room temperature to obtain polyaspartic acid ester resin. Add 80 parts by weight of silane coupling agent KH550 and 87 parts by weight of dimethyl maleate into another reaction kettle with nitrogen, stir and heat up to 70°C for 8 hours; then add 170 parts by weight of IPDI trimer and keep warm at 70°C The reaction was carried out for 2 hours, cooled to normal temperature to obtain a prepolymer with -NCO active functional group, which was dissolved in butyl acetate and set aside.

[0052] Add 507 parts by weight of polyaspartic acid ester resin, 57 parts by weight of epoxy resin E44 and 75 parts by weight of butyl acetate into a nitrogen-filled reaction kettle, stir and mix evenly, and add dropwise the solutio...

Embodiment 2

[0055] Add 150 parts by weight of 4,4'-diaminodicyclohexylmethane into the reaction kettle with nitrogen gas, stir and raise the temperature to 75°C, and add 287 parts by weight of dibutyl maleate dropwise to the reaction kettle. After the dropwise addition, React at a temperature of 80° C. for 16 hours, and cool to room temperature to obtain a polyaspartic acid ester resin. Add 80 parts by weight of silane coupling agent KH550 and 87 parts by weight of dibutyl maleate into another nitrogen reactor, stir and raise the temperature to 70°C for 8 hours; then add 170 parts by weight of HDI trimer and keep warm at 70°C The reaction was carried out for 2 hours, cooled to normal temperature to obtain a prepolymer, which was dissolved in butyl acetate and set aside.

[0056] Add 437 parts by weight of polyaspartic acid ester resin, 113 parts by weight of epoxy resin E44 and 75 parts by weight of butyl acetate into a nitrogen-filled reaction kettle, stir and mix evenly, and add dropwis...

Embodiment 3

[0058] Add 128 parts by weight of amino-terminated polyether D2000 into the reaction kettle with argon gas, stir and heat up to 75°C, add 378 parts by weight of dibutyl maleate dropwise into the reaction kettle, after the dropwise addition, at a temperature of 80°C After 16 hours of reaction, polyaspartic acid ester resin was obtained. Add 80 parts by weight of silane coupling agent KH570 and 88 parts by weight of dibutyl maleate into another reaction kettle with argon, stir and raise the temperature to 70°C for 8 hours; then add 170 parts by weight of IPDI trimer and keep it warm for 70 React at ℃ for 2 hours, cool to room temperature to obtain a prepolymer, dissolve the prepolymer in xylene, and set aside.

[0059] Add 506 parts by weight of polyaspartic acid ester resin, 58 parts by weight of epoxy resin E44 and 75 parts by weight of xylene into a reaction kettle with argon gas, stir and mix evenly, and add dropwise in advance dissolved in 25 parts by weight of 338 parts b...

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to a modified polyaspartic acid ester polyurea coating and a preparation method thereof. The coating comprises a component A and a component B, and the component A and the component B are respectively prepared and independently stored. The component A comprises isocyanate and / or a polymer of isocyanate; and the component B is prepared from the following substances in parts by weight: 20 to 75 parts of organic silicon and epoxy dual-modified polyaspartic acid ester resin, 5 to 35 parts of a filler, 0.1 to 5 partsof a pigment, 0.5 to 10 parts of an auxiliary agent and 5 to 30 parts of a solvent. An organic silicon unit and an epoxy unit are introduced into a polyaspartic acid ester resin structure to obtain anovel polyurea coating with excellent low-temperature flexibility, bonding strength, weather resistance and mechanical properties, and the coating is simple in preparation method, good in controllability, low in cost, capable of being prepared in batches and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a modified polyaspartate polyurea coating and a preparation method thereof. Background technique [0002] Polyurea coating is a non-polluting, high-performance and environmentally friendly material. It is a new type of material developed after high-solid coatings, water-based coatings, light-curing coatings and powder coatings in recent years. It has been widely used in materials field of protection. After the first-generation aromatic polyurea coating and the second-generation aliphatic polyurea, the third-generation polyaspartate polyurea converts the active functional group primary amine group in traditional polyurea into a secondary amine group. Under the combined action of polyaspartic acid effect and steric hindrance effect, the reactivity in polyaspartate is greatly reduced, and the gel time is controllable due to its special molecular structure, which can be applied by ...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D5/08C08G18/79C08G18/65C08G18/64C08G18/38C08G18/12C08G18/58
CPCC09D175/02C09D5/08C08G18/792C08G18/65C08G18/6415C08G18/3893C08G18/12C08G2150/90C08G18/58C08G18/64
Inventor 姜锦廖益均文皓吴晓莉周理
Owner SICHUAN JUNSHANG ACRYLIC MFG CO LTD
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