TABLET

Abstract

A tablet for forming a liquid dishwash composition on dissolution in water comprising from 0.1 to 40% wt. surfactant, an effervescent, an acid salt selected from sodium bisulphate, monosodium phosphate and mixture thereof, and a disintegrant.

Claims

1. A tablet for forming a liquid dishwash composition on dissolution in water comprising: from 0.1 to 40% wt. surfactant; an effervescent; at least 10% wt. of an acid salt selected from sodium bisulphate, monosodium phosphate and mixture thereof; and a disintegrant.

2. A tablet according to claim 1 wherein the surfactant is selected from anionic surfactants, non-ionic surfactants and mixtures thereof.

3. A tablet according to claim 1 wherein the effervescent is present at from 10 to 50% wt. of the tablet.

4. A tablet according to claim 1 wherein the effervescent is selected from a carbonate salt, a bicarbonate salt and mixtures thereof.

5. A tablet according to claim 1 wherein the acid salt is present at from 10 to 50% wt. of the tablet.

6. A tablet according to claim 1 wherein the ratio of the effervescent to the acid salt is from 5:1 to 1:5 by weight.

7. A tablet according to claim 1 wherein the disintegrant is present at from 5 to 40% wt. of the tablet.

8. A tablet according to claim 1 wherein the disintegrant is selected from polyvinyl pyrrolidone, microcrystalline cellulose and mixture thereof.

9. A tablet according to claim 1 wherein the disintegrant is polyvinyl pyrrolidone.

10. A method for forming a hand dishwash liquor by depositing a tablet according to claim 1 into water.

11. A method according to claim 1 wherein the ratio of the tablet to water is from 1:10 to 1:100 by weight.

Description

EXAMPLES

[0023] The following are formulations for preparing a tablet composition for forming a hand dishwash composition in use.

TABLE-US-00001 TABLE 1 Formulation A Formulation 1 Ingredient (% w/w) (% w/w) PAS 15.83 15.98 CMEA  4.95  5.00 Sodium bicarbonate 29.67 29.47 Sodium bisulphate 0   29.47 Citric acid 29.67 0   Disintex 75 19.78 19.98 Silica + Perfume + Dye 0.1 0.1

[0024] Formulation 1 is a formulation according to invention and formulation A is a comparative. Process for manufacture:

[0025] All ingredients were taken as dry powder and were mixed in appropriate weight as per table 1. A measured amount (2.5 gram) of the powder mixture was poured into a mould and pressed using a rotary press or hydraulic press. After some time, the tablet was ejected out of the mould and stored in a container.

[0026] Test Methodology for Measuring Disintegration Time:

[0027] A tablet weighing 2.5 gram was dropped in a beaker containing 40 millilitre water, thereby the tablet disintegrated to smaller granules and dissolved. Time taken for the tablet to disintegrate to a size of less than 1 millimetre was noted as the disintegration time

[0028] Test Methodology for Assessing Fizz:

[0029] Fizz was assessed by measuring the amount of foam generated by fizzing of the tablet during dissolution in water. A tablet was dropped in a measuring cylinder containing 50 millilitres water and allowed to fizz. Volume of the foam was measured after 60 seconds. If the foam volume was more than 30 millilitres, it was considered as good fizz. The foam volume of 10 to 30 millilitres was considered as moderate fizz and less than 10 millilitres was considered as poor fizz.

[0030] Evaluation of the Formulations:

TABLE-US-00002 TABLE 2 Formulation Formulation A Formulation 1 Disintegration time (seconds) 150 30 Fizzing Moderate Good

[0031] Table 2 shows that formulation 1 takes significantly less time to disintegrate and generates good amount of fizz compared to formulation A. This implies that the formulation 1 dissolves fast generating good amount of effervescence compared to formulation A.