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Biodegradable amylum colophony for injection molding and preparation method and products thereof

A technology of starch resin and biodegradation, which is applied in the field of biodegradable thermoplastic starch resin for injection molding and its preparation, can solve the problems of not meeting the requirements of use, reducing starch content, etc., achieve good hardness and bending strength, increase heat resistance temperature, and take into account The effect of resilience needs

Active Publication Date: 2012-02-08
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

Although this kind of resin has a high starch content, it cannot be directly used to make plastic products. It needs to be mixed with other resins with good processing performance and mechanical properties during processing to meet the processing performance and mechanical properties of plastic products. The content of starch in plastic products is reduced, so that the starch content in plastic products is only about 35%, which can only be partially degraded, so it cannot meet the requirements of use.

Method used

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  • Biodegradable amylum colophony for injection molding and preparation method and products thereof
  • Biodegradable amylum colophony for injection molding and preparation method and products thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This example is used to illustrate the biodegradable starch resin provided by the present invention and its preparation method.

[0028] The raw material composition is: 30 kg of food grade corn starch, 10 kg of glycerin, 5 kg of diethylene glycol, 1 kg of stearic acid, 2 kg of calcium stearate, 1 kg of monoglyceride, 8 kg of ethylene-ethyl acrylate copolymer, 15kg of high-density polyethylene, 11kg of high-melt polypropylene, and 20kg of low-melt polypropylene. 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 ethylene-ethyl acrylate copolymer is 150,000, the molecular weight distribution is 1.2, the melt index is 25 g / 10 minutes, and the density is 0.94 g / cm 3 , the content of acrylic acid is 8%; the number average molecular weight of high-density polyethylene is 170,000, the molecular weight distribution is 1.2, and the density is 0.96g / cm 3 ; Gao Rong...

Embodiment 2

[0035] This example is used to illustrate the biodegradable starch resin provided by the present invention and its preparation method.

[0036] The raw materials are: 25 kg of food grade tapioca starch, 11 kg of glycerin, 3 kg of diethylene glycol, 0.6 kg of stearic acid, 1.5 kg of calcium stearate, 1.5 kg of monoglyceride, 6 kg of ethylene-ethyl acrylate copolymer, High density polyethylene 11 kg, high melt index polypropylene 9 kg, low melt index polypropylene 15 kg. Wherein, the water content of tapioca starch is 14wt%; The density of monoglyceride is 0.922g / cm 3 , the ester content is 32%; the number average molecular weight of ethylene-ethyl acrylate copolymer is 170,000, the molecular weight distribution is 1.2, the melt index is 22 g / 10 minutes, and the density is 0.93 g / cm 3 , the content of acrylic acid is 10%; the number-average molecular weight of high-density polyethylene is 150,000, the molecular weight distribution is 1.2, and the density is 0.96g / cm 3 ; Gao Ro...

Embodiment 3

[0043] This example is used to illustrate the biodegradable starch resin provided by the present invention and its preparation method.

[0044] The raw materials are: 35 kg of food grade potato starch, 7 kg of glycerin, 7 kg of diethylene glycol, 1.4 kg of stearic acid, 1.5 kg of calcium stearate, 0.5 kg of monoglyceride, 9 kg of ethylene-ethyl acrylate copolymer, 18 kg of high-density polyethylene, 13 kg of high-melt polypropylene, and 25 kg of low-melt polypropylene. Among them, the water content of potato starch is 14wt%; the density of monoglyceride is 0.92g / cm 3 , the ester content is 35%; the number average molecular weight of ethylene-ethyl acrylate copolymer is 200,000, the molecular weight distribution is 1.2, the melt index is 27 g / 10 minutes, and the density is 0.95 g / cm 3 , the content of acrylic acid is 9%; the number average molecular weight of high-density polyethylene is 250,000, the molecular weight distribution is 1.2, and the density is 0.955g / cm 3 ; Gao R...

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Abstract

The invention provides biodegradable amylum colophony for injection molding and a preparation method and products thereof. The colophony comprises the following components in parts by weight: 25-35 parts of good grade amylum, 7-11 parts of glycerol, 3-7 parts of diethylene glycol, 0.6-1.4 parts of stearic acid, 1.5-2.5 parts of calcium stearate, 0.5-1.5 parts of monoglyceride, 6-9 parts of ethylene-ethyl acrylate copolymer, 11-18 parts of high density polyethylene (HDPE), 9-13 parts of polypropylene with high melt index and 15-25 parts of polypropylene with low melt index. The biodegradable amylum colophony provided by the invention has good hardness and flexural strength; and compared with the existing biodegradable amylum colophony, the biomass content is higher and the processability and the biodegradable performance are improved. The biodegradable thermoplastic amylum colophony can be used for manufacturing disposable goods or perishable articles, such as hangers, ball point pens,brassies, nails for outdoor tents and disposable knives, forks, chopsticks, spoons or bowls.

Description

technical field [0001] The invention relates to a biodegradable starch resin and its preparation method and products, more particularly to a biodegradable thermoplastic starch resin for injection molding, its preparation method and the products produced by using the resin. Background technique [0002] Plastic is one of the most widely used materials, and a large number of waste plastic products cause serious pollution to the ecological environment. The development and application of degradable plastics is one of the most effective ways to solve this problem. At present, from the classification of raw materials, biodegradable plastics mainly include the following types: [0003] 1. Polycaprolactone (PCL): It has good biodegradability, and it can be mixed with starch and cellulose materials, or polymerized with lactic acid; [0004] 2. Polybutylene succinate (PBS) and its copolymers: use PBS as the base material to manufacture various high molecular weight polyesters; [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L23/08C08L23/06C08L23/12C08K13/02C08K5/053C08K5/06C08K5/09C08K5/098C08K5/103B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/92704B29C2948/92895
Inventor 彭晓峰常军
Owner NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD