Copolymerizates of unsaturated carboxylic acids, process for the

Details Copolymerizates of unsaturated carboxylic acids, process for the Copolymerizates of unsaturated carboxylic acids, process for the

1996-09-30

1998-06-02

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526287, 5263182, 5263171, 25217424, C08F22004, C08F22800, C08F22202, C11D 337

Patent

active

057601500

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to copolymerizates of unsaturated carboxylic acids and other unsaturated compounds, mixtures thereof with other copolymerizates of unsaturated carboxylic acids with other unsaturated compounds, and the use of said copolymerizates as textile treatment aids and in detergents and cleaning agents.
Complexing agents and dispersants are needed in amounts of many a thousand tons in the areas of textile industry as well as detergent and cleaning agent industry and after use find their way to the waste water.
In the prior art, aminopolycarboxylic acids have been frequently used, such as aminocarboxylic acids, phosphonic acids, and polyacrylic acids. The use of such compounds, however, has significant ecological drawbacks: from waste water and, with the exception of NTA which is but insufficiently active in many processes, are hardly biodegradable. of being eliminated by adsorption to sewage sludges, are not biodegradable. are, however, rapidly degraded in environmentally relevant concentrations by hydrolysis and photolysis ("Environmental Properties and Safety Assessment of Organic Phosphonates Use of Detergent and Water Treatment Applications" by W. E. Gledhill and T. C. J. Feijtel in "The Handbook of Environmental Chemistry", Volume 3, part F, Springer-Verlag 1992, pages 261-285). In addition, these phosphonates can be biologically eliminated by adsorption to sewage sludge and, in contrast to the classical complexing agents, EDTA or DTPA, have no remobilisation potential for toxic heavy metals, such as cadmium and mercury. Nevertheless, this class of substances too is often undesirable for the mere reason of their phosphorus content, or their use is restricted by legal regulations.
It is therefore desirable for environmental reasons to synthesize and employ in practice complexing and dispersing compounds without the drawbacks of classical complexing agents. The object is to use renewable raw materials, such as monosaccharides or polysaccharides, as starting materials for synthesizing adequately biodegradable dispersants, in particular based on organic carboxylic acids.
DE-24 22 823 B2 describes the use of polyacrylic acids for dyeing cellulose fibers. DE-29 26 098 A1 describes polyacrylic acids for aftertreatment agents in dyeing with reactive dyes for the purpose of improving the washability of unfixed dye hydrolysates. U.S. Pat. No. 4,916,178 A describes polyacrylic acids, U.S. Pat. No. 4,963,157 A describes the combination of polyacrylic acids with phosphonic acids for the use in hydrogen peroxide bleaches. These laid-open and patent specifications disclose polyacrylic acids (in U.S. Pat. No. 4,963,157 A in combination with phosphonic acids) which are not biodegradable.
DE-42 03 797 A1 describes hydrogen peroxide stabilizers for hydrogen peroxide textile bleaches consisting of magnesium ions, gluconic acid and nitrilotriacetic acid which may further contain citric acid. Hardly biodegradable ethylenediaminetetraacetic acid and phosphorus-containing products, which may be used, optionally in combination with gluconic acid, as hydrogen peroxide stabilizers according to DE-22 11 578 B2 with and without water glass, are dispensed with. DE-42 08 106 A1 describes compositions of citric acid, sugar acids, such as gluconic acid, and optionally a small amount of mineral acid for the pretreatment of textile fiber materials. DE-41 13 003 A1 and EP 0 510 331 A2 describe proteins, protein hydrolysates and carboxymethylated protein hydrolysates, also for the stabilization of hydrogen peroxide. Although DE-42 03 797 A1, DE-42 08 106 A1, DE-41 13 003 A1 and EP 0 510 331 A2 disclose biodegradable mixtures, these formulations lack the dispersing properties known from polyacrylates.
From EP 0 289 895 A2, there is known the preparation of copolymerizates of acrylic acid with glucose which are characterized by high calcium binding capacities and good biodegradability. EP 0 364 681 describes corresponding compounds based on disaccharides, namely leucrose and palatinose.
It has now surprisingly been foun

REFERENCES:
patent: 4916178 (1990-04-01), Amati et al.
patent: 4963157 (1990-10-01), Machida et al.
patent: 4963629 (1990-10-01), Driemel et al.

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