Aspartic ester self-leveling coating and preparation method thereof

An aspartic acid ester and self-leveling technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor surface condition and inconvenient construction of aspartic acid ester resin, and achieve excellent surface condition and easy operation The effect of prolonging the use time and reducing the reaction speed

Active Publication Date: 2017-06-20
SHENZHEN FEIYANG JUNYAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to overcome the technical bottleneck of inconvenient construction and poor surface state of the aspartic acid ester resin pr

Method used

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  • Aspartic ester self-leveling coating and preparation method thereof
  • Aspartic ester self-leveling coating and preparation method thereof
  • Aspartic ester self-leveling coating and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0019] Embodiment 1 This embodiment discloses a kind of aspartic acid ester self-leveling coating, and described coating comprises following components:

[0020]

[0021] The preparation method of described aspartic acid ester, described method step is as follows:

[0022] Put 14g of 4,4'-diaminodicyclohexylmethane and 63.47g of 3,3'-dimethyl-4,4-diaminodicyclohexylmethane into a 250ml four-neck flask, add 22.27 g of diethyl maleate and 121.6 g of di-n-butyl maleate were added dropwise to the maleic acid ester at room temperature, and the temperature was controlled to be added dropwise below 50° C. under nitrogen protection. After the dropwise addition, the temperature was raised to 70° C., and the mixture was kept warm for 48 hours to discharge to obtain a new type of aspartic acid ester resin.

[0023] This embodiment discloses the preparation method of the coating described in embodiment 1, specifically:

[0024] Add corresponding weight parts of defoamer, leveling age...

experiment example

[0026] 1) Solvent-free and environmentally friendly products, with a solid content of more than 98%, and no heavy metals and plasticizers.

[0027] 2) Good construction and operation performance. At 23°C, the mixing viscosity is about 800cps, and the operation time is 30 minutes.

[0028] 3) Good anti-scratch and wear-resistant effect. Under the environment of 23 ℃, the surface hardness is 2H, the Shore D hardness is above 75, and the abrasion is 20mg.

[0029] 4) Good impact resistance. A 1kg iron ball will not crack when dropped 2m, the elongation of the paint film is 10%, and the tensile strength is about 20MPa.

[0030] 5) Good yellowing resistance. UV lamp 340nm, 0.71w / m2, 1000 hours cycle test △E<1.5. Gained coating properties are tested, and the test results are shown in Table 1:

[0031] Table 1

[0032]

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Abstract

Belonging to the field of coating processing, the invention in particular relates to an aspartic ester self-leveling coating and a preparation method thereof. The coating comprises the following components: 97.8 weight parts of aspartic ester; 1 weight part of a dispersant; 0.3 weight part of a defoaming agent; 0.5 weight part of a wetting agent; 0.4 weight part of a leveling agent; and 140-160 weight parts of quartz sand. According to the invention, di-n-butyl maleate is adopted as the raw material to replace a part of diethyl maleate to react with diamine so as to prepare aspartic ester. The branch chain extension reduces the overall reaction speed of aspartic ester, the usable time of the coating is prolonged, and the coating still can maintain the fast drying characteristic. The prepared paint film has excellent surface state.

Description

technical field [0001] The invention belongs to the field of paint processing, and in particular relates to an aspartate self-leveling paint and a preparation method thereof. Background technique [0002] Polyaspartate is an aliphatic compound with secondary amino groups. Compared with general hydroxyl resin and epoxy resin, it has a more excellent drying speed. In addition, the high-density ester bond on the branched polyaspartic acid also provides a strong polar group for the macromolecular chain, so that the polymer product has a strong cohesion, which is manifested in polyaspartic acid. Ester coating has outstanding mechanical strength. At the same time, the distribution of high-density ester bond branch chains, on the one hand, the branch chain itself provides plasticization, on the other hand, the ester bond adds flexibility, wear resistance and cohesiveness to the polymer, making polyaspartate The coating has better impact resistance, abrasion resistance and adhesi...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D7/12C08G73/12
CPCC08G73/121C08K3/36C09D7/61C09D175/02
Inventor 罗善锴吕文章薛隽罗庆陈开寿谢夏陆邬茳
Owner SHENZHEN FEIYANG JUNYAN TECH DEV
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