EP1891118A1 - Stärkephosphate und verfahren zu deren herstellung - Google Patents
Stärkephosphate und verfahren zu deren herstellungInfo
- Publication number
- EP1891118A1 EP1891118A1 EP06706559A EP06706559A EP1891118A1 EP 1891118 A1 EP1891118 A1 EP 1891118A1 EP 06706559 A EP06706559 A EP 06706559A EP 06706559 A EP06706559 A EP 06706559A EP 1891118 A1 EP1891118 A1 EP 1891118A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- starch
- urea
- weight
- water
- phosphate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
- C08B31/02—Esters
- C08B31/06—Esters of inorganic acids
- C08B31/066—Starch phosphates, e.g. phosphorylated starch
Definitions
- the invention relates to a process for the preparation of starch phosphates with low carbamate content, which have a high degree of substitution with respect to the phosphate groups.
- the invention likewise relates to starch phosphates prepared in this way.
- a typical process for the preparation of starch monophosphates is the conversion of the starch according to the so-called. Neukom method (US 2, 884, 412).
- the starch is first suspended in an aqueous solution of alkali metal phosphate.
- the thus impregnated starch is filtered, predried temperature in air or in a drying oven at temperatures below the Verkleist fürstempe- and then annealed at temperatures of about 140 0 C ⁇ + _ 30 0 C).
- the resulting products have DS values ⁇ 0, 1 and usually have a brownish discoloration. This discoloration can, as described in DE 2,114,305, by an intensive
- step a) In a pretreatment step, the starch is dissolved in a mixture of phosphating agent, water and in the event that the phosphating agent is free of urea, b) the water is removed from the mixture in step a) and
- urea is not absolutely necessary in the event that urea phosphate is used as the phosphating agent.
- the mixture of phosphating agent, water and optionally urea is preferably 0 to 50% by weight, preferably 1 to 50% by weight and more preferably 20 to 40% by weight of urea.
- the mixture preferably comprises from 3 to 40% by weight, in particular from 10 to 20% by weight, of phosphating agent, these details referring to the use of urea phosphate as phosphating agent.
- the solution of starch in the mixture consists of 5 to 20% by weight of starch, 3 to 40% by weight of phosphating agent, 20 to 40% by weight of urea and 25 to 55% by weight of water, in each case based on the mixture including starch.
- Particularly preferred are here 5 to 15% by weight of starch, 10 to 15% by weight of phosphating agent, 30 to 40% by weight of urea and 35 to 45% by weight of water.
- step b) The removal of the water performed in step b) may be accomplished by any of the methods known in the art. Preferred here is an azeotropic distillation with an alcohol such. B. 2 -propanol.
- the thermal reaction in step c) is preferably carried out in a drying oven, an oven or a fluidized bed reactor.
- the preferred temperature in the thermal reaction is 100 to 150 0 C, more preferably 120 0 C.
- phosphating preferably phosphate salts are used.
- phosphoric acid and / or urea phosphate are preferred.
- a starch phosphate with a degree of substitution of phosphate groups of 0, 01 to 2, 0, and a content of carbamate groups of £ 0, 1 is also provided.
- the degree of substitution of phosphate groups is preferably from 0.5 to 1.5.
- the starch phosphates according to the invention have a high degree of substitution of bound phosphate groups, with the phosphorus contents of these groups being 16%.
- the bound phosphate groups are composed of mono-, di- and triphosphate esters, the majority being monophosphate.
- the products have a low content of carbamate groups DS Carb . ⁇ 0, 1.
- the pre-treatment improves the accessibility of the reagent and results in products with a more uniform distribution of the substituents along the chain.
- the products are white to slightly yellowish, show in 2% aqueous solution thickening properties and Polyelektrolytkomplex realise with correspondingly positively charged polymers, such as poly (diallyl dimethylammonium) chloride.
- Starch phosphates according to the invention additionally show a high water retention capacity.
- starch phosphates invention u. a. in the building materials sector, for example as an additive in mineral or dispersion-bound building material systems, where they can be used to adjust the rheology and / or water retention. Another use is as an additive in pharmacy and cosmetics. Further fields of application relate to the use as anionic component for polyelectrolyte complexes.
- the starch phosphates according to the invention can be used as a carrier material, in particular in agriculture.
- a 2% aqueous solution is a slightly turbid solid gel and shows a significant precipitate with poly (dadmac).
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510004586 DE102005004586B4 (de) | 2005-02-01 | 2005-02-01 | Stärkephosphate, Verfahren zu deren Herstellung und deren Verwendung |
PCT/EP2006/000884 WO2006082043A1 (de) | 2005-02-01 | 2006-02-01 | Stärkephosphate und verfahren zu deren herstellung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1891118A1 true EP1891118A1 (de) | 2008-02-27 |
Family
ID=36588989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06706559A Withdrawn EP1891118A1 (de) | 2005-02-01 | 2006-02-01 | Stärkephosphate und verfahren zu deren herstellung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1891118A1 (de) |
DE (1) | DE102005004586B4 (de) |
WO (1) | WO2006082043A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101508738B (zh) * | 2009-03-17 | 2012-12-19 | 闫怀义 | 磷酸酯直链淀粉及其衍生物的制备方法 |
CN102121103B (zh) * | 2010-01-11 | 2012-07-04 | 张华斌 | 一种低温无渣锌系磷化剂及其制备方法和应用 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999039715A1 (en) * | 1998-02-06 | 1999-08-12 | Medical Isotopes Inc. | Readily absorbable phytosterols to treat hypercholesterrolemia |
EP1319395A2 (de) * | 2001-12-17 | 2003-06-18 | Beiersdorf AG | Stabile wirkstoffhaltige Zubereitungen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE851180C (de) * | 1943-12-05 | 1952-10-02 | Diamalt Ag | Verfahren zur Herstellung eines Staerkeproduktes aus Kartoffelstaerke |
GB968427A (en) * | 1962-07-16 | 1964-09-02 | Penick & Ford Ltd Inc | Modification of starch |
DE1443509C3 (de) * | 1964-02-05 | 1973-10-04 | Blattmann & Co, Waedenswil (Schweiz) | Verfahren zur Herstellung von Phosphor und gegebenenfalls Stickstoff enthaltenden Polysaccharid-Derivaten |
DE2114305C3 (de) * | 1971-03-24 | 1980-01-03 | Hoffmann's Staerkefabriken Ag, 4902 Bad Salzuflen | Verfahren zur Herstellung von Phosphatstarke |
DE19722340A1 (de) * | 1997-05-28 | 1998-12-03 | Clariant Gmbh | Wasserquellbare, hydrophile Polymerzusammensetzungen |
DE19736452C2 (de) * | 1997-08-21 | 2003-08-28 | Fraunhofer Ges Forschung | Polymerer Schutzfilm, Verfahren zu seiner Herstellung, dessen Verwendung sowie Verfahren zum Schützen von Oberflächen |
DE19859123C1 (de) * | 1998-12-21 | 2000-03-16 | Eisu Innovative Ges Fuer Techn | Stärke-phosphate, Verfahren zu deren Herstellung sowie deren Verwendung |
EP1431393A1 (de) * | 2002-12-19 | 2004-06-23 | Bayer CropScience GmbH | Pflanzen, die eine Stärke mit erhöhter Endviskosität synthetisieren |
-
2005
- 2005-02-01 DE DE200510004586 patent/DE102005004586B4/de not_active Expired - Fee Related
-
2006
- 2006-02-01 WO PCT/EP2006/000884 patent/WO2006082043A1/de active Application Filing
- 2006-02-01 EP EP06706559A patent/EP1891118A1/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999039715A1 (en) * | 1998-02-06 | 1999-08-12 | Medical Isotopes Inc. | Readily absorbable phytosterols to treat hypercholesterrolemia |
EP1319395A2 (de) * | 2001-12-17 | 2003-06-18 | Beiersdorf AG | Stabile wirkstoffhaltige Zubereitungen |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI 7 June 1980 Derwent World Patents Index; AN 1980-52246C, "Increasing the fluidity of concrete mix - by adding water reducing agent and organic adhesion increasing agent contg. sodium starch-phosphate ester" * |
See also references of WO2006082043A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2006082043A1 (de) | 2006-08-10 |
DE102005004586A1 (de) | 2006-08-03 |
DE102005004586B4 (de) | 2007-12-20 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Effective date: 20071026 |
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Effective date: 20080320 |
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DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN Owner name: DOW WOLFF CELLULOSICS GMBH |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN Owner name: DOW GLOBAL TECHNOLOGIES INC. |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DOW GLOBAL TECHNOLOGIES LLC Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN |
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