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Waterborne radiation-supportive curing polyurethane acrylate combination, preparation method and coating

A technology of urethane acrylate and radiation curing, which is applied in the field of coatings and can solve problems such as sedimentation, low gloss, and weak alkalinity of neutralizers

Active Publication Date: 2016-06-15
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The neutralizer used in this patent is weak in alkalinity, and the stability of the paint resin is poor. When preparing the formula paint, it is easy to produce unstable phenomena such as sedimentation.
[0006] Patent US6284836B1 discloses a low-gloss coating composition. Diatomite and other matting agent particles are added to the coating formula to obtain a low-gloss effect, but the amount added is greater than 6wt% of the solid content of the coating composition. Due to the large amount added, The coating is too brittle, the matting agent in the coating is easy to deposit, and the coating resistance is reduced, etc.

Method used

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  • Waterborne radiation-supportive curing polyurethane acrylate combination, preparation method and coating
  • Waterborne radiation-supportive curing polyurethane acrylate combination, preparation method and coating
  • Waterborne radiation-supportive curing polyurethane acrylate combination, preparation method and coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] In a 2000ml four-neck flask equipped with a stirrer, condensing reflux tube, and thermocouple, add 90g HDI trimer (A1), 90g PETA (A2), 20g HEA (A2) and 5gNPG (A3), and 0.2g ethylhexanoic acid Bismuth catalyst and 0.15g polymerization inhibitor p-methoxyphenol were reacted at 80°C for 2 hours. After the content of the test-NCO group was 0.05wt%, the reaction was complete, and 160gH was added thereto. 12 MDI(B1), 100gPNA1000(B4), 30gDMPA(B2), 10gNPG(B3) and 30gPETA(B5), at the same time, in order to reduce the reaction viscosity, add 50g of acetone, react at 80°C for 2 hours, start sampling test in the reaction system- NCO group content, stop the reaction until the -NCO group content is 2.2wt%, add 200g acetone and cool down to the temperature of the reaction system reaches 40 ° C, 17.5g triethylamine (B6) is added in the reaction system, stir and neutralize for 5 Add 840g water after 2 minutes and carry out dispersion emulsification to obtain milky white emulsion, and ad...

Embodiment 2

[0097] In a 1000ml four-necked flask equipped with a stirrer, condensing reflux tube, and thermocouple, add 120g of IPDI trimer (A1) and 350g of PETA (A2), and 0.4g of bismuth octoate metal catalyst and 0.15g of inhibitor p-methoxy Phenol was reacted at 80° C. for 2 hours, and after the content of the -NCO group was tested to be 0.05 wt %, the reaction was complete to obtain polyurethane acrylic acid oligomer A for use. Another 46g of HDI (B1), 50g of PBA1000 (B4), 100g of PNA2000 (B4), 16.8g of DMPA (B2) and 30g of acetone were taken and reacted at 80°C for 2 hours, then began to take samples to test the content of -NCO groups in the reaction system until - The content of the NCO group is 1.7wt% to stop the reaction, and add the spare urethane acrylate oligomer A to mix evenly, add 200g of acetone to cool down until the temperature of the reaction system reaches 40°C, add 12.6g of triethylamine (B6) In the reaction system, after stirring and neutralizing for 5 minutes, add 10...

Embodiment 3

[0099] In a 2000ml four-necked flask equipped with a stirrer, condensing reflux tube, and thermocouple, add 97.2g HDI biuret (A1), 52.5g HEMA (A2) and 7.6g BDO (A3), and 0.13g bismuth acid catalyst and 0.1g Inhibitor p-methoxyphenol, reacted at 80°C for 2 hours, after the test-NCO group content was 0.05wt%, the reaction was complete, and 195gIPDI (B1), 190gPNA1000 (B4), 26.5gDMPA (B2) were added thereto And 175g PETA (B5), add 50g acetone in order to reduce reaction viscosity simultaneously, after reacting at 80 ℃ for 2 hours, begin to sample and test the content of -NCO group in the reaction system, stop reaction until the content of -NCO group is 2.9wt% , add 200g of acetone to cool down until the temperature of the reaction system reaches 40°C, add 14g of triethylamine (B6) into the reaction system, stir and neutralize for 5 minutes, then add 1080g of water to disperse and emulsify to obtain a milky white emulsion, and add 8.3 g of ethylenediamine (EDA) (B7) was stirred for...

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Abstract

The invention provides a waterborne radiation-supportive curing polyurethane acrylate combination. The combination comprises, by weight, 20-80 parts of polyurethane acrylate oligomer A and 20-80 parts of water dispersible polyurethane polymer B. The combination is high in stability, pH value is 7.5-9, and viscosity is 10-500 cps; when being stored at temperature below 25 DEG C for 20 days, the pH value is lowered by less than 10% than an initial value, and the viscosity is changed by less than 10% than an initial value; when being stored at temperature below 50 DEG C, the pH value is lowered by less than 20% than an initial value, and the viscosity is changed by less than 10% than an initial value.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a water-based radiation-curable polyurethane acrylate composition, a preparation method and a water-based coating containing the composition. Background technique [0002] The main component of light-curing water-based coatings is water-dispersible polyurethane acrylate oligomers. In order to improve the various mechanical properties and resistance of the coating, some multifunctional acrylate compounds are usually added to the oligomers or multifunctional Hydroxy acrylic reacts with isocyanate groups. When preparing the aqueous radiation-curable polyurethane acrylate composition for emulsification and dispersion, an alkali neutralizing agent is added to neutralize the hydrophilic compound in the polyurethane acrylate. The light-cured water-based coating prepared in this way is usually alkaline, and the acrylate group in the resin, especially the multifunctional free acrylate, is easily ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/42C08G18/34C08G18/12C08G18/32C09D175/14C09D7/12
CPCC08G18/66C08G18/67C09D175/14C08G18/672C08G18/12C08G18/348C08G18/4202C08G18/4238C08G18/664C08G18/6659C08G18/673C09D7/40C08G18/3228C08G18/0823
Inventor 王洪武任率祖孙伟祖邓俊英程继业
Owner WANHUA CHEM GRP CO LTD
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