| 摘要 |
The invention relates to a process for the preparation of low-density soap/detergent bars for personal/fabric washing or for hard surface cleaning. A precursor(s) of a detergent active is reacted with an alkaline material having an elemental ratio of boron to aluminium (B:AI) in the range 1:0 to 1:21, wherein the boron containing alkaline material is preferably sodium meta-borate with solids content 20-60% and the aluminium containing alkaline material is preferably sodium aluminate with a solid content of 20 to 55%.The ratio of Al2O3 to Na2O is ideally 0.5 to 1.55 by weight to obtain a mixture of borate and/or borate-alumina and detergent active at a temperature between 25oC to 95oC. Water and other detergent additives as desired are added and the product is converted into a bar that comprises 5 to 70% detergent active, 0.5 to 30% by weight of borate or borate-alumina and 5 to 55% water and other optional ingredients. The bars retain moisture, structure moisture and do not shrink during storage. |
