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Method for preparing starch type fully degradable plastic

A fully degradable and starch technology, applied in the field of preparation of starch-type fully degradable plastics, can solve the problems of difficult synthesis, low starch content, environmental pollution, etc., and achieve the effect of enhancing biodegradation performance

Inactive Publication Date: 2004-10-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials are only subjected to light collapse, and cannot be degraded after being buried in the soil. The degradation result is only to change the synthetic resin from large pieces to small pieces, and it is difficult to achieve satisfactory results.
Chinese patents CN1173515A and CN1174856A rely on starch as a filler and combine photodegradation technology to develop light and biodegradable plastics. However, due to the low starch content in their products, they are starch-filled plastics and cannot be completely degraded. They still have certain environmental impacts. degree of pollution
In recent years, people have developed a variety of biodegradable materials by synthetic methods, such as polyaliphatic polyester, polylactic acid, microbial polyester, etc. A large number of promotional applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: (take by weight percentage)

[0024] Superfine starch: 30

[0025] Diethylene glycol: 2.5

[0026] Lauric acid: 1.7

[0027] Corn Oil: 2

[0028] N-isopropyl-N'-phenyl-p-phenylenediamine: 0.07

[0029] Polyethylene wax: 0.8

[0030] Iron diethyldithiocarbamate: 0.07

[0031] Manganese acetylacetonate: 0.08

[0032] Polyhydroxybutyrate: 2

[0033] EAA: 12

[0034] LDPE: 48.78

[0035] Raise the temperature of the high-speed mixer to 75±5°C, then put the superfine starch into the high-speed mixer, stir at high speed for 3 minutes, add diethylene glycol in three times, and then add lauric acid, corn oil, N-isopropyl Base-N'-phenyl-p-phenylenediamine, EAA, polyhydroxybutyrate, the time interval between each feeding is 3 minutes, and mix evenly to form starch derivatives; add LDPE into the high-speed mixer, and add diethyl diethylene glycol in sequence at room temperature Ferric thiocarbamate, manganese acetylacetonate, and polyethylene wax are added ...

Embodiment 2

[0036] Embodiment 2: (take by weight percentage)

[0037] Superfine starch: 35

[0038] Glycerin: 3.1

[0039] Stearic acid: 1.7

[0040] Aluminate coupling agent 1.5

[0041] White oil: 0.5

[0042] 2,6-di-tert-4-methyl-p-cresol: 0.07

[0043] Calcium stearate: 0.7

[0044] Iron diethyldithiocarbamate: 0.06

[0045] Cobalt acetylacetonate: 0.05

[0046] EAA: 16

[0047] LLDPE: 13.99

[0048] HDPE: 27.33

[0049] Raise the temperature of the high-speed mixer to 75±5°C, then put the superfine starch into the high-speed mixer, stir at high speed for 2 minutes, add glycerin three times, and then add stearic acid, aluminate coupling agent, white Oil, 2,6-di-tert-4-methyl-p-cresol, EAA, each feeding time interval is 5 minutes, mix well to form starch derivatives; add LLDPE, HDPE into the high-speed mixer, add diethyl Ferric dithiocarbamate, cobalt acetylacetonate, and calcium stearate are added at intervals of 3 minutes each time, and mixed uniformly to form a mixture; sta...

Embodiment 3

[0065] Embodiment 3: (take by weight percentage)

[0066] Superfine starch: 40

[0067] Ethylene glycol: 3.7

[0068] Linoleic acid: 1.5

[0069] Titanate coupling agent 1

[0070] White oil: 1.3

[0071] β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate: 0.08

[0072] Oleamide 0.6

[0073] Iron stearate: 0.04

[0074] Manganese stearate: 0.04

[0075] Cobalt oleate: 0.03

[0076] EAA: 10

[0077] Polycaprolactone: 5

[0078] PP: 31.53

[0079] HDPE: 5.18

[0080] Raise the temperature of the high-speed mixer to 75±5°C, then put the superfine starch into the high-speed mixer, stir at high speed for 3 minutes, add ethylene glycol in three times, and then add linoleic acid and titanate coupling agent in sequence , white oil, β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecanol propionate, EAA, polycaprolactone, each feeding time interval is 4 minutes, mix well to form starch derivatives ;Add PP and HDPE into the high-speed mixer, add iron stearate, cobalt olea...

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Abstract

A starch-type fuel-degradable plastics is prepared from superfine starch, plasticizer, compatibilizer, cooxidanta nd synthetic degradating material. Its advantages are synergistic effect of the combination of optical degradation, thermal oxidizing degradation and biologic degradation and short degradation period (one year).

Description

Technical field: [0001] The invention belongs to a preparation method of starch-type fully degradable plastics. Background technique: [0002] At present, the plastics industry is developing rapidly, with an annual consumption of over 100 million tons, including about 30 million tons in the United States and Europe, about 12 million tons in Japan, and about 4 million tons in China. Its use has penetrated into all sectors of the national economy and all areas of people's lives. It is listed as the four pillars of the material field along with steel, wood, and cement. Plastic has brought civilization to mankind, but the waste generated by its extensive application is also increasing day by day, causing environmental pollution is becoming more and more serious, especially disposable packaging materials, polluting mountains, lakes, cities and coastal ports, has caused people to have "white terror" ". [0003] Solutions to "white pollution" include recycling, incineration, land...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/56C08L3/02
Inventor 白福臣叶永成
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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