Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1993-09-08
1996-12-24
Shaver, Paul F.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C11D 1700
Patent
active
055871046
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a new formulation for ingredients of detergents and/or cleaning products, particularly laundry detergents, to correspondingly formulated detergents and/or cleaning products and to the new process for their production. More particularly, the invention relates to the production of a comparatively coarse-particle and permanently free-flowing material which, on the one hand, is compacted to high apparent densities but which, on the other hand, is capable by virtue of its special structure of rapidly interacting with liquid phases, particularly aqueous liquid phases, so that the particle structure is destroyed.
2. Discussion of Related Art
In recent years, there have been many proposals relating to the production of solid, powder-form or agglomerated granular detergents and/or cleaning products having high apparent densities. From the more recent past, reference is made to EP 340 013 and to the documents cited therein EP 219 328, EP 270 240 and GB 1,517,713 (all Unilever), EP 229 671 and JP 61 069 897 (Kao) and also to EP 220 024 (Procter & Gamble). The first of these documents describes granular detergent mixtures having an apparent density of at least 650 g/l which are obtained by mixing selected non-soap-like surfactants (at least partly corresponding anionic surfactants) in certain ratios with predeterminated quantities of crystalline or amorphous sodium aluminium silicate. The granules are said to be produced in a high-speed mixer/granulator which carries out the mixing and size reduction steps of the process. The process is carried out in the presence of a liquid binder, the preferred binder being water which, if necessary, may be added before or during the granulation step. According to the Examples, the particle size of the agglomerates obtained in this way is well below 1 mm and, in general, is in the range from about 400 to at most 600 .mu.m.
A more recent proposal from the same applicants can be found in EP 367 339. This document also describes the production of comparatively fine detergent granules having apparent densities of at least 650 g/l. The production process is now said to be carried out in two stages: the fine-particle mixture of active substances is treated in a high-speed mixer and, at the same time, compacted in a first process step (5 to 30 seconds) and, in a following second process step, the compacted material is granulated at lower throughputs over a period of about 1 to 10 minutes, again with simultaneous compaction of the material. The material thus obtained is said to be dried and/or converted by cooling into the free-flowing state. The Examples of this document are concerned with comparing the respective apparent densities and the associated percentage particle porosities and particle sizes. It is shown that the described two-stage process provides for a distinct increase in apparent density--for example to values of up to about 950 g/l--accompanied by a substantial reduction in percentage particle porosity. Whereas the powders obtained by spray drying have apparent densities of around 400 g/l for a particle porosity of 45 to 50%, the apparent densities of the material compacted in two stages are in the range from about 700 to 900 g/l while particle porosity can be reduced to values below 20% and, in particular, below 10%. The particle size of the compacted material can reach a value of approximately 1 mm, but once again is generally well below that value.
In German patent application DE 39 26 253, the applicants responsible for the development disclosed in the following describe a new process for the production of solid free-flowing granules of detergents and/or cleaning products, more particularly corresponding laundry detergents. These granules are distinguished by apparent densities of at least about 700 g/l and preferably in the range from about 850 to 1,000 g/l. The granules are produced by extrusion using only very small quantities of liquid phase, particularly water, and in a preferred embod
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Hoffmeister Juergen
Jacobs Jochen
Raehse Wilfried
Zeise Christiane
Grandmaison Real J.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Shaver Paul F.
Szoke Ernest G.
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