Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Heterogeneous arrangement
Patent
1998-11-19
2000-11-14
Gupta, Yogendra
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Heterogeneous arrangement
510443, 510475, 510505, C11D 300, C11D 337
Patent
active
061470481
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to the use of at least trihydric alcohols and their reaction products with ethylene oxide and/or propylene oxide as additive to particulate detergent formulations to increase their rate of dissolving in water in amounts of from 0.1 to 5% by weight based on the detergent formulations.
2. Description of the Background
Particulate detergents are intended, on introduction into water, to disintegrate as quickly as possible into-the individual ingredients in order to form the wash liquor ready for use. The rate of dissolving of some particulate detergent formulations, in particular compact detergents which have, for example, an apparent density of at least 550 g/l, on mixing with water is, however, still in need of improvement.
It is an object of the present invention to provide a detergent additive which results in an increase in the rate of dissolving of particulate detergents in water.
SUMMARY OF THE INVENTION
We have found that this object is achieved by the use of reaction products of at least trihydric alcohols with ethylene oxide and/or propylene oxide as additive to particulate detergent formulations to increase their rate of dissolving in water in amounts of from 0.1 to 5% by weight based on the detergent formulations.
DETAILED DESCRIPTION OF THE INVENTION
Examples of suitable at least trihydric alcohols are glycerol, diglycerol, triglycerol, tetraglycerol, pentaglycerol, hexaglycerol, heptaglycerol and octaglycerol, pentaerythritol, trimethylolpropane, erythritol, mannitol, sorbitol, sucrose, glucose and polyvinyl alcohols with molecular weights of up to 20,000. In place of the individual compounds it is also possible to employ mixtures of said compounds. Of particular industrial interest is, for example, the use of hydrogenated starch hydrolyzates or hydrogenated glucose syrups. It is possible to employ, for example, commercially available hydrogenated starch hydrolyzates supplied by Cerestar under the trade names SORBIDEX 200 and SORBIDEX 122.
Particularly effective products for increasing the rate of dissolving of particulate detergent formulations are reaction products of at least trihydric alcohols with ethylene oxide and/or propylene oxide. These reaction products and processes for their preparation form part of the prior art. Thus, for example, reaction of glycerol, erythritol, pentaerythritol, trimethylolpropane, mannitol or sorbitol with ethylene oxide and/or propylene oxide in the presence of conventional alkoxylation catalysts such as KOH, NaOH, Ca hydroxide, Ca oxide or supported catalysts results in detergent additives which considerably increase the rate of dissolving of detergent formulations in water compared with polyethylene glycol. The alkoxylated products may have a wide or a narrow molecular weight distribution. Of particular importance in this connection are the reaction products of glycerol, erythritol, pentaerythritol, trimethylolpropane, mannitol or sorbitol with ethylene oxide. For example, 1 mol of an at least trihydric alcohol is reacted with 1 to 100 mol of ethylene oxide. These products can be modified by allowing them to react further where appropriate with up to 20 mol of propylene oxide. However, the procedure for preparing modified ethylene oxide adducts can be such that a mixture of ethylene oxide and propylene oxide gases is allowed to act on the at least trihydric alcohols. Another possible variation comprises reacting said alcohols initially with propylene oxide and subsequently with ethylene oxide. Propylene oxide is preferably employed in an amount of from 1 to 15 mol per mole of alcohol. Reaction products of 1 mol of trimethylolpropane with 1 to 100 mol of ethylene oxide are particularly preferably employed, with reaction products of 1 mol of trimethylolpropane with 3 to 30 mol of ethylene oxide mostly being used.
Also suitable as detergent additive which increases the rate of dissolving of detergent formulations in water are ethoxylated hydrogenated sugars such as sorbitol or man
REFERENCES:
Derwent Abstracts, AN 96-236357/24, JP 8-092591, Apr. 9, 1996.
Derwent Abstracts, AN 86-314279/48, JP 61-231099, Oct. 15, 1986.
Derwent Abstracts, AN 90-227943/30, JP 2-155928, Jun. 15, 1990.
aus dem Kahmen Martin
Huff Jurgen
Jager Hans-Ulrich
Kroner Matthias
Lux Jurgen Alfred
BASF - Aktiengesellschaft
Gupta Yogendra
Webb Gregory
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