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Full biological degradable composition and its preparing method and use

A biodegradation and whole-biological technology is applied in the field of whole-biodegradable composition and its preparation and use, which can solve the problems of high production cost, low starch content, large equipment investment and the like, and achieve complete biodegradability and good biodegradability. , the effect of excellent mechanical properties

Inactive Publication Date: 2007-09-19
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, due to the use of single-component polyester or low starch content in it, large investment in equipment, high production costs, long flow of materials in the traditional screw extruder, high energy consumption, and the adaptability of processed materials The limited performance makes the cost of raw materials of products much higher than that of ordinary plastic products of the same kind, and limits the performance of fully biodegradable plastics, which is unsatisfactory.
These have seriously restricted the large-scale production and application of fully biodegradable plastics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The weight composition of each component raw material:

[0045] Modified corn starch 80.0 parts

[0046] Polycaprolactone 20.0 parts

[0047] Calcium carbonate (50nm) 5.5 parts

[0048] Glycerin 6.0 parts

[0049] Stearic acid amide 4.0 parts

[0050] Dodecyl maleic anhydride 2.5 parts

[0051] Vinyltrimethoxysilane 1.0 parts

[0052] Linoleic acid / modified starch composition (10 / 60) 1.8 parts

[0053] Steps:

[0054] The cornstarch was dried at normal temperature and pressure to a moisture content of 1.5%. Add 1.0% (weight) modifier calcium stearate to the dried cornstarch, mix well and refine to 2200 mesh. Then take modified cornstarch and glycerin according to the above ratio and mix them evenly in a high-speed mixer at a speed of 1000r / min for 15 minutes, then add the biodegradable polymer polycaprolactone and stearic acid amide in sequence according to the above ratio ,well mixed. The rotating speed is 1200r / min, the time is 12 minutes, and the temperature ...

Embodiment 2

[0061] The weight composition of each component:

[0062] Modified tapioca starch 75.0 parts

[0063] Polylactic acid 60 parts

[0064] Clay (60nm) 3.6 parts

[0065] Butanediol 8.0 parts

[0066] 2.4 parts of methylene bis stearamide

[0067] Maleic anhydride grafted polycaprolactone 0.8 parts

[0068] Cyclohexyldimethoxysilane 1.5 parts

[0069] Linolenic acid / tapioca starch composition (25 / 80) 2.0 parts

[0070] Tapioca starch was dried under reduced pressure (-0.06MPa) at 50°C to a moisture content of 5%. Add 2.5% (weight) modifying agent stearic acid in the tapioca starch after drying, refine to 2500 orders after mixing. Then take the modified tapioca starch and butanediol according to the above ratio and mix them evenly in a high-speed mixer at a speed of 1500r / min for 10 minutes, then add the biodegradable polymer polylactic acid and methylene bishard in sequence according to the above ratio. Fatty amide, mix well. The rotating speed is 1500r / min, the time is 1...

Embodiment 3

[0077] The weight composition of each component:

[0078] Modified pea starch 20 parts

[0079] 50 parts polyvinyl alcohol

[0080] Montmorillonite (30nm) 3.0 parts

[0081] Sorbitol 5.5 parts

[0082] Ethylene bis stearamide 6.0 parts

[0083] Hydroxyl-modified polyethylene terephthalate (PET) 0.5 part

[0084] Epoxy silane 3.0 parts

[0085] Phosphite / modified starch composition (40 / 90) 2.5 parts

[0086] Pea starch was dried at 150°C and reduced pressure (-0.002MPa) to a moisture content of 10%. Add 4.0% (weight) modifier sodium stearate to the dried pea starch, mix well and refine to 3000 mesh. Then take the modified pea starch and sorbitol according to the above ratio and mix them evenly in a high-speed mixer at a speed of 3000r / min for 5 minutes, then add the biodegradable polymer polyvinyl alcohol and ethylene bisstearate in sequence according to the above ratio amide, mix well. The rotating speed is 2000r / min, the time is 10 minutes, and the temperature is 30°...

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Abstract

The fully biodegradable composition consists of modified starch, biodegradable polymer, nanometer reinforcer, plasticizer, lubricant, reactive bulking agent, crosslinking agent and biodegradation promoter. The preparation process includes drying starch and fining modification and plasticizing treatment, mixing with supplementary material, and extrusion and pelletizing in reciprocating single-screw extruder and electric mixer. The composition is completely biodegradable, has high adaptability, easy use, wide use range and low cost, and may be used directly as resin or mixed with other resin.

Description

technical field [0001] The present invention relates to a fully biodegradable composition, as well as a preparation method and application of the composition. Specifically, it is a fully biodegradable composition with starch and biodegradable polymer as the basic and main raw materials, its preparation method and application. Background technique [0002] At present, the use of plastic materials and products is becoming more and more extensive, as well as the environmental protection problems brought about by the traditional plastic industry and the shortage of resources based on the petroleum industry. In consideration of environmental protection and finding alternative resources and recyclable resources, research and The application of biodegradable materials has become an inevitable trend and focus of the development of the plastics industry. [0003] The development of degradable plastics has generally gone through two stages: the first stage is the stage of photodegrad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L67/04C08L29/04C08L75/04C08K5/54
Inventor 陈庆郭林陈兵杨欣宇
Owner CHENDU NEW KELI CHEM SCI CO LTD
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