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Biodegradable thermoplastic starch resin, preparation method thereof and products thereof

A thermoplastic starch and biodegradation technology, applied in the field of biodegradable thermoplastic starch resin and its preparation, can solve the problems of long degradation induction period, poor effect, and unsatisfactory cost, and achieve the effect of cheap price and cost reduction

Active Publication Date: 2011-01-12
NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degradation speed, depth and uniformity of photodegradable and photo-biodegradable plastics with photosensitizers are relatively poor
The biodegradable starch-based plastics are divided into direct-added starch type and modified starch type. The modified starch-type degradable plastics have a long degradation induction period and poor effect; the degradable plastics directly added with high content of starch have good degradation performance, but the strength , toughness, etc. often cannot replace the original resin
[0005] The patent application number 200710190063.8 uses the blending of degradable polymer materials and natural polymer materials in order to solve the contradiction between performance and cost. Among them, the content of polylactic acid and thermoplastic starch is basically 1:1. The performance of the product has improved, but it is still not ideal and the cost is still high

Method used

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  • Biodegradable thermoplastic starch resin, preparation method thereof and products thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] This example is used to illustrate the biodegradable thermoplastic starch resin provided by the present invention and its preparation method.

[0025] The raw materials are: 60 kg of food grade corn starch, 15 kg of diethylene glycol, 1 kg of stearic acid, 2 kg of calcium stearate, 1 kg of monoglyceride, 2 kg of titanium dioxide, 10 kg of ethylene-acrylic acid copolymer, high Melt finger polypropylene 5 kg and low melt finger polypropylene 10 kg. Among them, the water content of cornstarch is 13wt%; the density of monoglyceride is 0.916g / cm 3 , the ester content is 30%; the number average molecular weight of the ethylene-acrylic acid copolymer is 150,000, the molecular weight distribution is 1.2, the melt index is 15 g / 10 minutes (190 ° C, 2.16 kg), and the density is 0.925 g / cm 3 , the content of acrylic acid is 8%; the number-average molecular weight of high-melting polypropylene is 100,000, the molecular weight distribution is 1.2, the melt index is 28 g / 10 minutes,...

Embodiment 2

[0032] This example is used to illustrate the biodegradable thermoplastic starch resin provided by the present invention and its preparation method.

[0033] The raw materials are: 56 kg of food grade wheat starch, 20 kg of diethylene glycol, 1.2 kg of stearic acid, 1.8 kg of calcium stearate, 1 kg of monoglyceride, 1.5 kg of titanium dioxide, 18 kg of ethylene-acrylic acid copolymer, high Melt finger polypropylene 8 kg and low melt finger polypropylene 12 kg. Among them, the water content of cornstarch is 13wt%; the density of monoglyceride is 0.916g / cm3 , the ester content is ≥ 30%; the number average molecular weight of the ethylene-acrylic acid copolymer is 200,000, the molecular weight distribution is 1.2, the melt index is 15 g / 10 minutes (190 ° C, 2.16 kg), and the density is 0.95 g / cm 3 , the content of acrylic acid is 10%; the number-average molecular weight of high-melting polypropylene is 150,000, the molecular weight distribution is 1.2, the melt index is 25 g / 10 m...

Embodiment 3

[0040] This example is used to illustrate the biodegradable thermoplastic starch resin provided by the present invention and its preparation method.

[0041] The raw materials are: 65 kg of food grade potato starch, 10 kg of diethylene glycol, 1.3 kg of stearic acid, 1.5 kg of calcium stearate, 1.5 kg of monoglyceride, 0.8 kg of titanium dioxide, 16 kg of ethylene-acrylic acid copolymer, high Melt finger polypropylene 10 kg and low melt finger polypropylene 7 kg. Among them, the water content of starch is 14wt%; the density of monoglyceride is 0.92g / cm 3 , the ester content is ≥ 30%; the number average molecular weight of the ethylene-acrylic acid copolymer is 200,000, the molecular weight distribution is 1.2, the melt index is 15 g / 10 minutes (190 ° C, 2.16 kg), and the density is 0.94 g / cm 3 , the content of acrylic acid is 9%; the number average molecular weight of high melting point polypropylene is 80,000, the molecular weight distribution is 1.2, the melt index is 30 g / ...

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Abstract

The invention discloses biodegradable thermoplastic starch resin, a preparation method thereof and products thereof. The resin comprises the following components in part by weight: 55 to 65 parts of food-grade starch, 10 to 20 parts of diglycol, 0.5 to 1.5 parts of octadecanoic acid, 1.5 to 2.5 parts of calcium stearate, 0.5 to 1.5 parts of monoglyceride, 8 to 20 parts of ethylene-acrylic acid copolymer, 1 to 10 parts of high-fusion-index polypropylene and 5 to 15 parts of low-fusion-index polypropylene. Compared with the biodegradable starch resin of which the component content is not in the range of the invention, the biodegradable thermoplastic starch resin provided by the invention is more advantageous in processing performance and biodegradation performance. The biodegradable thermoplastic starch resin can be used for manufacturing toy sheet plastic-absorption products, bean curd boxes, soft drink flexible packaging boxes, disposal hotel bath tool packages, seedling cups or pesticide bottles.

Description

technical field [0001] The invention relates to a biodegradable thermoplastic starch resin and its preparation method and product, more specifically to a biodegradable thermoplastic starch resin with high starch content and high degradation rate, its preparation method and product. Background technique [0002] Disposable plastic products currently available on the market, such as agricultural mulch film, cushioning packaging materials for nursery cups, beverage cups, and fast food utensils, are all products that are difficult to degrade. Due to the gradual increase in the use of these products in recent years, white pollution has been formed, causing environmental pollution and affecting the ecological balance. [0003] To solve white pollution, countries currently adopt different measures according to their national conditions, mainly including the following methods: one is recycling, the other is incineration, and the third is using degradable resin / plastic. However, the...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L23/08C08L23/12C08K13/02C08K3/22C08K5/06
Inventor 彭晓峰常军
Owner NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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