# US 4,394,336 A · Production of tablets of sodium dichloroisocyanurate

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- Number: US 4,394,336 A
- Document ID: US4394336A
- Status: Granted
- Kind: A
- Application number: 06/284,758
- Filed: 1981-07-20
- Granted: 1983-07-19
- Earliest claimed: 1980-08-01
- Assignees: Shikoku Kasei Kogyo Co., Ltd.
- Inventors: Tadao Shimamura; Junji Nakano; Yasufumi Seo
- Web page: https://patentgrep.com/patent/US4394336A

## CPC

- A61K 9/0007: {Effervescent (A61K9/0065 takes precedence)}
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)

## Abstract

Production of tablets of sodium dichloroisocyanurate which dissolve gradually and smoothly in water without causing any undesirable collapse and swelling. The sodium dichloroisocyanurate with a regulated moisture content is tabletted and then the resulting tablets are thermally treated under specific conditions.

## Claims

### Claim 1

A method of producing sodium dichloroisocyanurate tablets capable of gradually and smoothly dissolving in water, comprising tabletting particulate sodium dichloroisocyanurate with a moisture content of from about 7 to about 20 weight %, and thermally treating the resulting tablets at a temperature of from about 50.degree. to about 100.degree. C. under a condition such that the water content in said tablets is not lost by vaporization.

### Claim 2 (depends on 1)

A method as claimed in claim 1, wherein the thermal treatment is carried out with hot air having a relative humidity of at least about 50%.

### Claim 3 (depends on 1)

A method as claimed in claim 1, wherein sodium dichloroisocyanurate with a moisture content of from about 14 to about 20 weight % is tabletted and then the resulting tablets are thermally treated at a temperature of from about 50.degree. to about 100.degree. C. with hot air.

### Claim 4 (depends on 1)

A method as claimed in claim 1, wherein sodium dichloroisocyanurate with a moisture content of from about 7 to about 14 weight % is tabletted and then the resulting tablets are thermally treated with hot air having a relative humidity of at least about 50%.

### Claim 5 (depends on 1)

A method as claimed in claim 1, wherein the formed tablets are heated at a temperature ranging from about 65.degree. to about 80.degree. C.