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Biological-degradable starch/polyester plastic completely and production thereof

A biodegradable, polyester plastic technology, applied in the field of starch/polyester plastic materials, can solve the problems of unsatisfactory comprehensive performance, limited application scope, poor thermal stability, etc., to achieve excellent biodegradation performance, easy to match equipment, not easy to Degradation effect

Inactive Publication Date: 2006-05-31
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the above-mentioned polyester plastic material, although it is reported that it can be completely biodegradable, and has good biocompatibility and water resistance, but from the actual use situation, due to the low melting point and thermal conductivity of the current starch / aliphatic polyester material The shortcomings of poor stability and poor mechanical properties, the comprehensive performance cannot meet the various requirements for materials in practical applications, and the price is high, which is not conducive to promotion, and its application range is still greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The weight composition of each component: 60 parts of thermoplastic corn starch

[0044] PCL / PET copolyester 20 parts

[0045] 3 parts dodecenyl succinic anhydride

[0046] DCP 0.8 copies

[0047] 10 parts of dibutyl adipate

[0048] 1,4-butanediol bis(β-aminobutenoic acid) ester 5 parts

[0049] 3 parts liquid paraffin

[0050] Blend the PCL and PET in the raw material at 150-180°C, add modifier dodecenylsuccinic anhydride, initiator DCP, plasticizer dibutyl adipate, stabilizer 1 , 4-butanediol bis(β-aminobutenoic acid) ester, lubricant liquid paraffin, make the materials mixed and reacted, and then add thermoplastic with a particle size of 1-9 μm after mechanical-chemical modification and plasticization treatment. For starch, carry out melt mixing and grafting reaction at a temperature of 100-200°C for 15-30 minutes in a high-speed mixer, and then continue mixing in an...

Embodiment 2

[0055] Each component weight composition: thermoplastic tapioca starch 50 parts

[0056] PLA / PBT copolyester 15 parts

[0057] 5 parts maleic anhydride

[0058] BPO 0.5 part

[0059] 2 parts dibutyl phthalate

[0060] Thiodiethylene glycol bis(β-aminobutenoic acid) ester 4 parts

[0061] Polyethylene wax 10 parts

[0062] Operate in the same feeding manner and conditions as in Example 1 to obtain the corresponding fully biodegradable starch / polyester plastic material. The relevant performance test data results are shown in Table 2.

[0063] The measured value of example 2 material

Embodiment 3

[0065] The weight composition of each component: 40 parts of thermoplastic wheat starch

[0066] 30 parts of PEA / PPT copolyester

[0067] Undecenylsuccinic anhydride 5 parts

[0068] DTBP 0.2 parts

[0069] Sorbitan Acetate 20 parts

[0070] Pentaerythritol 5 parts

[0071] 1 part stearic acid

[0072] Operate in the same feeding manner and conditions as in Example 1 to obtain the corresponding fully biodegradable starch / polyester plastic material. The relevant performance test data results are shown in Table 3.

[0073] The measured value of example 3 material

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Abstract

A complete biological degradable starch / polyester plastics and its production are disclosed. It consists of thermoplastic starch, fatty-aromatic block co-mixed polyester, long-chain unsaturated carboxylic acid or acid anhydride graft modified ingredient, organic peroxidate initiator, polyhydric alcohol ester compound plasticizer, organic compound or polyhydric alcohol stabilizer or lubricant. The process is carried out by mechanical-chemical modification and thermoplastic treating, melt mixing fatty-aromatic block co-mixed polyester material with initiator, modifier and stabilizer in high-speed mixer, graft reacting, milling, cooling, breaking, reaction extruding by second bi-screw reaction extruder and granulating. Its advantages include excellent physical and mechanical properties, complete degradation. It can be used for agriculture, medicine, sanitation, engineering materials, refuse bag and packing materials.

Description

technical field [0001] The invention relates to a fully biodegradable starch / polyester plastic material, more specifically a polyester-starch plastic material made of aliphatic-aromatic block blends and a preparation method thereof. Background technique [0002] With the rapid development of the plastics industry, the corresponding "white pollution" situation is also becoming more and more serious. Facing the global energy crisis and increasing environmental pollution, there is an increasingly urgent need for new plastic materials that not only have excellent plastic properties but are also degradable. The currently used biodegradable plastics are mainly made by blending general-purpose plastics such as polyethylene and polypropylene with degradable polymers such as starch under certain conditions. The starch content in thin products is about 30%, and the starch content in thick products At about 50%, the processing technology of this degradable plastic is difficult, the de...

Claims

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Application Information

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IPC IPC(8): C08L3/02B29C48/395C08L67/03
CPCB29C48/04B29C48/40
Inventor 陈庆郭林杨欣宇陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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