Method for preparing thermoplastic compositions based on plasticized starch and resulting compositions

A composition, technology of thermoplastic starch, applied in the field of composition and thermoplastic starch composition obtained from the latter, able to solve problems such as limited use

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

AI Technical Summary

Problems solved by technology

Therefore, its use is very limited

Method used

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  • Method for preparing thermoplastic compositions based on plasticized starch and resulting compositions
  • Method for preparing thermoplastic compositions based on plasticized starch and resulting compositions
  • Method for preparing thermoplastic compositions based on plasticized starch and resulting compositions

Examples

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Embodiment Construction

[0164]Compositions according to the prior art and compositions according to the invention obtained with wheat starch, starch plasticizer, silane-grafted PE and coupling agent

[0165] Preparation of the composition:

[0166] The ones used for this instance are:

[0167] - as granular starch, a native wheat starch sold by the applicant under the name "Amidon de blé SP" [Wheat Starch SP], with a moisture content of about 12%;

[0168] - as a plasticizer for granular starch, a concentrated aqueous composition of glycerol-based and sorbitol-based polyols sold by the applicant under the name POLYSORB G84 / 41 / 00, having about 16% of water volume;

[0169] - As non-starch polymer, a polyethylene (PEgSi) grafted with 2% vinyltrimethoxysilane. The PEgSi used was previously obtained by grafting vinyltrimethoxysilane onto a low-density PE by extrusion. As an example of such a commercially available PEgSi, mention may be made of the products BorPEX ME2510 or BorPEX HE2515, both sold b...

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Abstract

The subject matter of the present invention is a starch-based composition comprising: (a) at least 51% by weight of a plasticized amylaceous composition comprising starch and a plasticizer for said starch, obtained by thermomechanically mixing granular starch and a plasticizer for said starch, (b) at most 49% by weight of at least one non-amylaceous polymer, and (c) a bonding agent having a molecular mass of less than 5000, comprising at least two functions, at least one which is capable of reacting with the plasticizer and at least another of which is capable of reacting with the starch and / or the non-amylaceous polymer, these amounts being expressed with respect to solids and relative to the sum of (a) and (b), a method for preparing such a composition and a thermoplastic composition obtained 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, such as extrusion, injection molding, moulding,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L51/06C08G18/64C08G18/32
CPCC08L51/003C08K5/0016C08K5/29C08G18/3206C08L3/02C08L51/06C08G18/6484C08K5/053C08G18/3218C08L2666/24C08L2666/26C08G18/64C08L23/00C08L23/06
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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