TCCA rapidly dissolving effervescent tablet and preparation method thereof

By modifying starch through grafting and cross-linking, a modified starch disintegrant was prepared, which solved the problem of slow disintegration of trichloroisocyanuric acid effervescent tablets in hard water and achieved the effect of maintaining rapid disintegration and stability in hard water.

CN122439677APending Publication Date: 2026-07-24NANNING BOYUAN SHANG TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANNING BOYUAN SHANG TECHNOLOGY CO LTD
Filing Date
2026-05-18
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing trichloroisocyanuric acid effervescent tablets disintegrate slowly in hard water, and the cross-linking structure of modified starch fails to effectively improve disintegration performance, resulting in inconvenience in use.

Method used

A modified starch disintegrant was prepared using a dual modification method of grafting and cross-linking. The grafting reaction was carried out by introducing a redox system of sodium allyl sulfonate, ammonium persulfate and sodium bisulfite into starch. Then, disodium hydrogen phosphate and sodium trimetaphosphate were added for cross-linking. The pH value was adjusted, and finally, a modified starch with excellent disintegrant properties was prepared.

Benefits of technology

The modified starch disintegrant exhibits short disintegration time in pure water, minimal increase in disintegration time in hard water, and maintains good disintegration performance even after heat storage. It also shows a low rate of decrease in available chlorine content and strong adaptability.

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Abstract

This invention belongs to the field of disinfectant technology, specifically relating to a TCCA instant effervescent tablet and its preparation method. A TCCA instant effervescent tablet, by weight percentage, is prepared from the following components: 35-50% trichloroisocyanuric acid, 8-15% urea, 10-18% anhydrous citric acid, 8-14% sodium bicarbonate, 3-8% modified starch disintegrant, 2-6% disodium hydrogen phosphate, 1-4% sodium dodecyl sulfate, 0.5-2% disodium ethylenediaminetetraacetate, 1-3% hydroxypropyl methylcellulose, 0.5-1.5% magnesium stearate, with talc to bring the total to 100%. This invention addresses the problems of existing disintegrants by preparing a modified starch disintegrant through grafting and cross-linking modifications. Experimental results show that effervescent tablets using the modified starch disintegrant of this invention have a disintegration time of only 65-112s in pure water, and the increase in disintegration time in hard water is small. After accelerated testing at 54℃ / 14d, the effective chlorine reduction rate is only 2.2-5.5%, and the increase in disintegration time is small. This indicates that the grafted and cross-linked dual-modified structure has good stability and can maintain excellent disintegration performance after heat storage.
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