Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Patent
1995-10-10
1997-09-09
Hertzog, Ardith
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Specific organic component
510223, 510230, 510318, 510361, 510434, 510533, C11D 337
Patent
active
056656939
DESCRIPTION:
BRIEF SUMMARY
DISCUSSION OF THE BACKGROUND
1. Field of the Invention
The present invention relates to the use of carboxyl-containing reaction products of proteins or protein hydrolyzates which have been hydrolyzed no further than the dipeptide stage as ingredient of detergents and cleaners.
2. Discussion of the Background
Z. Chem. 25 (1985), 18-19, discloses the reaction of amino acids or peptides with maleic anhydride in acetic acid.
JP-A-56/012 351 discloses reaction products of amino acids and maleic anhydride or succinic anhydride, which are prepared in organic solvents. The reaction products are used for example in shampoos or cleaners.
EP-A 0 455 468 discloses detergent formulations which contain chemically modified vegetable proteins as grayness inhibitor. The proteins are preferably modified by reaction with phthalic anhydride in an aqueous medium at a pH of at least 8. However, the degree of the modification of the proteins is relatively small, so that the reaction products have virtually no dispersing effect and do not enhance the primary detergency when used in detergents.
DE-A-4 033 209 describes the reaction of protein hydrolyzates having a molecular weight of from 200 to 20,000 with ether carbonyl chlorides in an aqueous medium. The reaction products are used as surfactants in detergents and cleaners.
EP-A--0457205 discloses the use of water-soluble or water-dispersible grafted proteins as ingredient of detergents and cleaners in amounts from 0.1 to 20% by weight, based on the respective formulations. The grafted proteins are prepared by free-radically initiated copolymerization of monoethylenically unsaturated monomers in the presence of proteins.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide dispersing additives for use in reduced-phosphate and phosphate-free detergents and cleaners.
We have found that this object is achieved according to the invention by the use of carboxyl-containing reaction products obtainable by reaction of dipeptide stage, pressure in the absence of free-radical initiators, an aqueous medium and an organic solvent to form reaction products having an acid number of at least 1.5 mmol of sodium hydroxide/g of reaction product, as ingredient of reduced-phosphate and phosphate-free detergents and cleaners.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The reaction products are prepared using as component a) maleic anhydride, maleic acid, fumaric acid or mixtures thereof. Preference is given to using maleic anhydride.
Suitable compounds for use as compounds of component b) are proteins or protein hydrolyzates which have not been hydrolyzed further than the dipeptide stage. Usable proteins include all synthetic or natural proteins and also mixtures of synthetic and natural proteins. The proteins can be of vegetable or animal origin. The proteins can be used in purified form or unpurified to prepare the reaction products. An example of a purified protein is soybean protein isolate, while whey protein is an example of an unpurified protein. Examples of animal proteins are caseine, whey, gelatin and bone glue. Examples of vegetable proteins are the proteins of potatoes, sugar beet, marrowfat peas, soybean, wheat and corn (maize).
The protein hydrolyzates are prepared by hydrolysis of the proteins under acid, neutral, basic or fermentative conditions. The hydrolysis of the proteins can be carried on to different extents, but not further than the dipeptide stage. The hydrolysis products may additionally contain portions of low molecular weight peptides. Component b) may also comprise mixtures of proteins and protein hydrolyzates. Examples of acid-, neutral- or base-hydrolyzed proteins are bone glue, soybean hydrolyzates and wheat hydrolyzates. However, the proteins can also be treated reductively or oxidatively to convert them into a more water-soluble form. For example, wheat gluten or soybean proteins can be reductively pretreated by means of alkali metal sulfite, alkali metal thiosulfate, mercaptoethanol, thioglycolic acid, thiolactic acid or alkali
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Zeitschrift Fur Chemie, vol. 25, pp. 18 and 19, 1985.
Derwent abstract accession No. 81-22497D/13, for JP 56012351, Feb. 6, 1981.
Baur Richard
Kroner Matthias
Kud Alexander
Schornick Gunnar
Schwendemann Volker
BASF - Aktiengesellschaft
Hertzog Ardith
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