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Preparation method of one-component polyaspartic acid ester topcoat coating

A technology of aspartic acid ester and aspartic acid ester, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of material waste, film performance defects, short, generally only 15-20min, etc. The effect of convenient, ultra-high outdoor weatherability

Active Publication Date: 2017-10-10
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this two-component curing system is used, the two components are mixed evenly in a certain proportion before coating construction. In order to ensure the construction quality, it must be accurately measured and mixed uniformly in the early stage of construction, otherwise the performance defects of the paint film will eventually occur. Mixing Coating needs to be completed as soon as possible after completion (the application period of construction is relatively short, generally only 15-20 minutes), if the construction is not timely, it will easily cause waste of materials

Method used

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  • Preparation method of one-component polyaspartic acid ester topcoat coating
  • Preparation method of one-component polyaspartic acid ester topcoat coating
  • Preparation method of one-component polyaspartic acid ester topcoat coating

Examples

Experimental program
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Effect test

Embodiment 1

[0065] With 150g polyaspartic acid ester Desmophen NH 1420, 40g methyl ethyl ketone, 0.5g titanium tetrachloride, 45g toluene (the mol ratio of secondary amino group in polyaspartic acid ester, ketone end-capping agent and the first catalyst is 2:2:0.009) were added to the reaction vessel in turn and mixed evenly, and after reflux at 120°C for 6 hours, 9.5g of water was collected in the water separator and the secondary amine characteristic peak disappeared in the infrared spectrum (such as figure 1 As shown, the C=C stretching vibration peak at the 1630-1695cm-1 place is obvious, and the N-H stretching vibration peak at the 3370-3390cm-1 place in the original a disappears), and the unreacted butanone and toluene are distilled out under reduced pressure to obtain the capped After the polyaspartate NH1420;

[0066] (2) Add 250g of polyether polyol N220, 30g of polyether polyol N330, and 20g of polyester polyol F1190 into the reaction vessel, dehydrate at -0.08MPa, 120°C for 2 h...

Embodiment 2

[0071] (1) 200g polyaspartic acid ester Desmophen NH1520, 55g cyclohexanone, 30g butanone, 1g titanium tetrachloride, 70g toluene (secondary amino group in polyaspartic acid ester, ketone blocking agent and the second The molar ratio of a catalyst is 2:2.8:0.014) successively added to the reaction vessel and stirred and mixed evenly, and after 4 hours of reflux at 140°C, 12g of water was collected in the water separator and the secondary amine peak disappeared in the infrared spectrum (infrared spectrum (omitted), unreacted cyclohexanone, methyl ethyl ketone and toluene are distilled off under reduced pressure to obtain end-capped polyaspartate NH1520;

[0072] (2) Add 100g of polyester polyol Desmophen 670, 180g of polyether polyol N220, and 20g of polyether polyol N330 into the reaction vessel, dehydrate at a vacuum degree of -0.1MPa and 110°C for 3 hours, cool to 70°C, pass Nitrogen to release the vacuum; add 101g IPDI, 157g IPDI trimer (70% solid content), 0.056g dibutylti...

Embodiment 3

[0077] (1) 180g polyaspartic acid ester F524, 60g methyl isobutyl ketone, 2g titanium tetrachloride, 60g toluene (secondary amino group in polyaspartic acid ester, ketone end-capping agent and the first catalyzer) The molar ratio is 2:2.2:0.039) into the reaction vessel in turn, stir and mix evenly, and after reflux at 130°C for 5 hours, 10.2g of water is collected in the water separator and the secondary amine peak disappears in the infrared spectrum (infrared spectrum is omitted) , unreacted methyl isobutyl ketone and toluene are distilled off under reduced pressure to obtain end-capped polyaspartate F524;

[0078] (2) Add 210g of polyether polyol N220, 30g of polyether polyol N330, and 60g of polyether polyol N210 into the reaction vessel, dehydrate at -0.09MPa and 115°C for 3 hours, cool down to 75°C, and blow nitrogen Release the vacuum; sequentially add 119gH 12 MDI, 0.08g stannous octoate, react at a constant temperature of 85°C for 2 hours, after the reaction is compl...

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Abstract

The invention provides a preparation method of one-component polyaspartic ester finishing paint. The obtained finishing paint is convenient to use. The preparation method includes the following steps that firstly, a ketone end-capping agent, polyaspartic ester and a first catalyst are subjected to a reflux reaction for 4-6 hours in a first organic solvent at the temperature of 120-140 DEG C, secondary amino groups of polyaspartic ester totally react with the ketone end-capping agent, and end-capped polyaspartic ester is obtained after the ketone end-capping agent which does not participate in the reaction and the first organic solvent are removed; secondly, polyurethane pre-polymer is prepared, wherein after polymer polyol and aliphatic isocyanate react, reactant is mixed with a selectable second organic solvent, and the polyurethane pre-polymer is obtained; thirdly, the end-capped polyaspartic ester, the polyurethane pre-polymer and auxiliaries are evenly mixed, and the one-component polyaspartic ester finishing paint is obtained.

Description

technical field [0001] The invention relates to a preparation method of a one-component polyaspartic ester topcoat coating, which belongs to the technical field of architectural coatings. Background technique [0002] Polyaspartic ester polyurea is a newly developed polyurea variety, which has excellent weather resistance, gloss retention, flexibility and mechanical properties. Compared with spray polyurea elastomer (SPUA), its The biggest feature is to change the shortcoming of spraying polyurea gel time, and realize spraying, rolling or brushing construction by adjusting its curing speed. [0003] Polyaspartate type polyurea coatings are usually two-component curing systems, such as the Chinese patent documents with publication numbers CN102108244A, CN103031045A, CN103436148A, CN103820014A, CN103834282A, CN104530943A, CN104497825A, which disclose several different two-component The preparation method of the polyaspartate type polyurea coating. When this two-component cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C08G18/79C08G18/73C08G18/75C08G18/48C08G18/42C08G18/32C08G18/12C08G18/10
CPCC08G18/10C08G18/12C08G18/4018C08G18/42C08G18/4804C08G18/73C08G18/755C08G18/758C08G18/792C09D175/02C08G18/3256
Inventor 刘玉亭孙德文冉千平万赟李波尹浩
Owner JIANGSU SOBUTE NEW MATERIALS
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