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Thermoplastic compositions based on soluble starch and method for preparing such compositions

A thermoplastic composition, a technology for the composition, applied in the field of the composition and the thermoplastic starch composition obtained from the latter, and can solve the problems of limited use and the like

Inactive Publication Date: 2010-12-29
ROQUETTE FRERES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, its use is very limited

Method used

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  • Thermoplastic compositions based on soluble starch and method for preparing such compositions
  • Thermoplastic compositions based on soluble starch and method for preparing such compositions

Examples

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Embodiment Construction

[0156] According to prior art (without coupling agent) and according to the base of the present invention (with coupling agent) Comparison of starch composition with water-soluble maltodextrin

[0157] Used for these instances are:

[0158] - As soluble starches, different maltodextrins sold by the applicant under the names GLUCIDEX 1, GLUCIDEX 2, GLUCIDEX 6, GLUCIDEX 12 and GLUCIDEX 19, with a water content of about 4%. These maltodextrins have a soluble fraction close to 100% in water at 20°C;

[0159] - a thermoplastic polyurethane (TPU) sold under the name ESTANE 58300 by Lubrisol as a non-biodegradable non-starch polymer; and

[0160] - As coupling agent, methylene diphenyl diisocyanate (MDI) sold under the name Suprasec 1400 by Huntsman.

[0161] A TSA brand twin-screw extruder (diameter (D) 26 mm, length 56D) was fed with a 50 / 50 maltodextrin (undried) / TPU mixture at a total throughput of 15 kg / h.

[0162] The extrusion conditions are as follows:

[0163] - tempe...

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Abstract

The subject matter of the present invention is a novel starch-based composition comprising: (a) at least 45% by weight of at least one soluble starch, (b) at most 55% by weight of at least one non-biodegradable, non-amylaceous polymer, and (c) a bonding agent carrying at least two functional groups capable of reacting with molecules carrying functions comprising an active hydrogen, these amounts being expressed with respect to solids and relative to the sum of (a) and (b). The present invention also relates to a method for preparing such a starch-based composition and to a thermoplastic composition prepared by heating such a composition.

Description

technical field [0001] The present invention relates to novel starch-based compositions and thermoplastic starch compositions obtained therefrom, and also to processes for the preparation of these compositions. Background technique [0002] The expression “thermoplastic composition” is understood in the context of the present invention to mean a composition which reversibly softens under the action of heat and hardens by cooling. It has at least one glass transition temperature (T g ), below which temperature the amorphous portion of the composition is in a brittle glassy state, and above which the composition may undergo reversible plastic deformation. The glass transition temperature or at least one glass transition temperature of the starch-based thermoplastic composition of the invention is preferably between -50°C and 150°C. The starch-based composition can of course be formed by methods customary in plastics processing (extrusion, injection molding, moulding, blow mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L75/04C08G18/64
CPCC08L75/04C08K5/29C08G18/7657C08L3/02C08G18/0895C08G18/6484C08L3/04C08L2666/20C08L2666/26
Inventor 莱昂·曼蒂克迪迪埃·拉尼奥热罗姆·吉梅内斯
Owner ROQUETTE FRERES SA
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