EP0438548A1 - Formmasse auf der basis von stärkeether zur ausformung biologisch abbaubarer formteile - Google Patents

Formmasse auf der basis von stärkeether zur ausformung biologisch abbaubarer formteile

Info

Publication number
EP0438548A1
EP0438548A1 EP90909721A EP90909721A EP0438548A1 EP 0438548 A1 EP0438548 A1 EP 0438548A1 EP 90909721 A EP90909721 A EP 90909721A EP 90909721 A EP90909721 A EP 90909721A EP 0438548 A1 EP0438548 A1 EP 0438548A1
Authority
EP
European Patent Office
Prior art keywords
starch
ethers
starchy
mouldings
compound based
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Withdrawn
Application number
EP90909721A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bernd Best
Rainer Frische
Renate Gross-Lannert
Klaus Wollmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Battelle Institut eV
Original Assignee
Battelle Institut eV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Battelle Institut eV filed Critical Battelle Institut eV
Publication of EP0438548A1 publication Critical patent/EP0438548A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/04—Starch derivatives, e.g. crosslinked derivatives
    • C08L3/08—Ethers
    • 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
    • C08B31/08—Ethers
    • C08B31/12—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0016—Plasticisers

Definitions

  • starch in particular from the linear component of the starch, the amylsis, films and thermoplastic molded parts can be produced.
  • modified starches in particular special starch ethers, can be used to produce films and moldings which often have improved performance properties. For example, Manufacture more flexible films and molded parts from starch ethers. This is based on solid, isolated starch ethers.
  • Starch ethers are formally reaction products between hydroxyl groups of the glucose units of the starch molecules and alcoholic hydroxyl groups of other compounds. Moldings made from hydroxyethyl and hydroxypropyl starch ethers are particularly suitable for the production of flexible films.
  • Hydroxyethyl or hydroxypropyl groups are introduced into the starch molecule by the action of the corresponding alkylene oxides on starch in aqueous alkali; chlorohydrins, e.g. Ethylene chlorohydrin and epichlorohydrin.
  • chlorohydrins e.g. Ethylene chlorohydrin and epichlorohydrin.
  • the conditions for producing oxyethylated starches are outlined in numerous patents, but precise details are rarely disclosed.
  • the introduction of hydroxyethyl and propyl groups into the starch molecule has a major impact on the gelatinization properties of the starches.
  • the paste shows greater clarity, and the retrogradation tendency in cooling and aging is much less than in the initial thicknesses.
  • Another way to change the material properties is to use suitable additives.
  • the number of positively tested additives is limited. Polyols such as e.g. Glycol and glycerin used.
  • the invention follows the path of achieving degradable and environmentally compatible materials with a high utility value by combining starch etherification and additive addition.
  • Oxethylated compounds, in particular citric acid have proven to be particularly advantageous as additives, and amylose and amylose starches have proven to be particularly suitable starches.
  • mixtures of starch and citric acid can be reacted chemically with the corresponding epoxides, in particular ethylene oxide, advantageously in a one-pot reaction, provided that suitable reaction conditions are met, and with little effort, and thus obtain base materials for film and molded part production.
  • base materials can be produced which, even with a low degree of oxyethylation, have good usage properties.
  • the low degree of oxyethylation also means that the starch weight fraction and the citric acid weight fraction of the base materials are particularly high, and products can thus be produced from hardly modified natural products. This is because epoxies are the more expensive raw material components compared to starch and citric acid From this point of view, the method according to the invention is also considerably superior to the prior art.
  • films made from a low-substituted hydroxyethyl starch (degree of substitution approx. 0.1-0.3) and 10% citric acid-ethylene oxide adduct as a plasticizer additive are much harder, hardly flexible and sometimes even brittle, as clear and transparent.
  • Amylose (0.05 M) is reacted with a factor of the theoretically necessary amount of ethylene oxide (0.4 M) according to the known procedure and analogously to Example 1.
  • the isolated starch product then has a relatively high degree of oxethylation of approximately 1. Films made from this matrix are soft, flexible and stretchy, but not sticky like comparatively film 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Biological Depolymerization Polymers (AREA)
EP90909721A 1989-06-23 1990-06-22 Formmasse auf der basis von stärkeether zur ausformung biologisch abbaubarer formteile Withdrawn EP0438548A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3920621 1989-06-23
DE3920621A DE3920621A1 (de) 1989-06-23 1989-06-23 Formmasse auf der basis von staerkeether zur ausformung biologisch abbaubarer formteile

Publications (1)

Publication Number Publication Date
EP0438548A1 true EP0438548A1 (de) 1991-07-31

Family

ID=6383434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90909721A Withdrawn EP0438548A1 (de) 1989-06-23 1990-06-22 Formmasse auf der basis von stärkeether zur ausformung biologisch abbaubarer formteile

Country Status (6)

Country Link
US (1) US5128461A (enrdf_load_stackoverflow)
EP (1) EP0438548A1 (enrdf_load_stackoverflow)
JP (1) JPH04502344A (enrdf_load_stackoverflow)
CA (1) CA2019570A1 (enrdf_load_stackoverflow)
DE (1) DE3920621A1 (enrdf_load_stackoverflow)
WO (1) WO1991000313A1 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114185C1 (enrdf_load_stackoverflow) * 1991-04-30 1993-02-04 Battelle-Institut E.V., 6000 Frankfurt, De
DE19523803B4 (de) * 1995-06-29 2004-08-12 Sopro Bauchemie Gmbh Baustoffelement, Baustoffelementpaket, umweltfreundliches Baustoffgebinde, und Verwendung einer Hülle aus wasserlöslichem Material als Verpackung für einen Baustoff
US6713624B1 (en) 2002-05-02 2004-03-30 Hasbro, Inc. Starch-based modeling compound
US7420024B2 (en) * 2003-01-16 2008-09-02 Cornell Research Foundation, Inc. Partially biodegradable temperature and pH sensitive hydrogel
US7553919B2 (en) * 2005-05-06 2009-06-30 Board Of Trustees Of Michigan State University Starch-vegetable oil graft copolymers and their biofiber composites, and a process for their manufacture
CN115322447B (zh) * 2022-09-20 2023-03-24 江南大学 一种淀粉基增韧复合材料的加工方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU37997A1 (enrdf_load_stackoverflow) * 1959-12-01
GB935339A (en) * 1960-10-27 1963-08-28 Staley Mfg Co A E Hydroxyalkyl amylose
GB1044139A (en) * 1964-07-20 1966-09-28 Staley Mfg Co A E Amylose solutions
JPS5315542B2 (enrdf_load_stackoverflow) * 1973-03-01 1978-05-25
US4112222A (en) * 1977-01-07 1978-09-05 National Starch And Chemical Corp. Method of preparing hydroxypropylated starch derivatives
DE2708513C3 (de) * 1977-02-26 1981-01-08 C.H. Boehringer Sohn, 6507 Ingelheim Wasserunlösliche, physiologisch unbedenkliche Masse, Verfahren zu ihrer Herstellung und ihre Verwendung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9100313A1 *

Also Published As

Publication number Publication date
WO1991000313A1 (de) 1991-01-10
DE3920621A1 (de) 1991-01-03
CA2019570A1 (en) 1990-12-23
JPH04502344A (ja) 1992-04-23
US5128461A (en) 1992-07-07
DE3920621C2 (enrdf_load_stackoverflow) 1991-09-19

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