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Green degradable resin and production thereof

A fully degradable, resin-based technology, applied in the field of polymer resins, can solve problems such as poor compatibility and unstable performance, and achieve the effects of improved compatibility, excellent product performance, and simple preparation methods

Active Publication Date: 2007-05-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Xiuzhi Sun of Kansas State University and others conducted research on the blending of polylactic acid and native starch, but the compatibility is poor and the performance is not stable enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 50 grams of corn starch and 15 grams of glycerin were stirred in a high-speed mixer for 15 minutes, mixed evenly, and left for 1 day to pre-plasticize the starch to obtain a mixture. The mixture was then mixed with 50 grams of polylactic acid, 1 gram of epoxy resin, 1 gram of tris(2,4-di-tert-butylphenyl) phosphite, and 1 gram of stearic acid in a twin-screw extruder. At 150-170 ℃ high temperature mixing, extrusion, granulation, molding, the speed of the twin-screw extruder is 50 rpm, and the material residence time is 10 minutes. The performance is shown in Table 1.

Embodiment 2

[0032] 30 grams of potato starch and 10 grams of polyethylene glycol were stirred in a high-speed mixer for 15 minutes, mixed evenly, and left for 1 day to pre-plasticize the starch to obtain a mixture. Then the mixture was mixed with 70 grams of polylactic acid, 4 grams of epoxy resin, 2 grams of tris(2,4-di-tert-butylphenyl) phosphite, 1 gram of stearic acid, and 1 gram of calcium stearate. In a twin-screw extruder at 160-180 ℃ high temperature mixing, extrusion, granulation, molding, the speed of the twin-screw extruder is 150 rpm, and the material residence time is 5 minutes. The performance is shown in Table 1.

Embodiment 3

[0034] 50 grams of corn starch and 15 grams of glycerin were stirred in a high-speed mixer for 15 minutes, mixed evenly, and left for 1 day to pre-plasticize the starch to obtain a mixture. The mixture was then mixed with 50 grams of polylactic acid, 0.5 grams of isocyanate, 1 gram of tris(2,4-di-tert-butylphenyl) phosphite, and 1 gram of calcium stearate in a twin-screw extruder. High-temperature mixing, extrusion, granulation, and molding at 140-160 °C, the speed of the twin-screw extruder is 150 rpm, and the material residence time is 5 minutes. The performance is shown in Table 1.

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Abstract

Green degradable resin and its production are disclosed. The resin consists of vegetable starch, fat polyester, plasticizer, compatibilizer, antioxidant and lubricant. The process is carried out by mixing vegetable starch with plasticizer form high-speed mixer, stirring for 10-20mins, laying aside for 1-2 day, preplasticizing mixture, adding mixture, fat polyester, compatibilizer, antioxidant and lubricant into double-screw extruder, melting and mixing from double-screw extruder, reacting and extruding, and obtaining the product. It achieves simple process, good performance and no environmental protection. It can be used fro disposable tableware, agricultural mulch film and packing bag.

Description

technical field [0001] The invention belongs to the technical field of polymer resins, and in particular relates to a green fully degradable resin and a preparation method thereof. Background technique [0002] The development of modern industry, especially the rapid development of petrochemical industry, provides a large number of synthetic resin and plastic products with excellent performance and low price for industrial and agricultural production and people's daily life. However, due to improper treatment, the used waste is arbitrarily discarded in fields, rivers, mountains, streets and other places, which seriously pollutes the living environment of human beings, resulting in "white pollution". At present, countries around the world have formulated strict measures to limit the use of single-use plastic products, and at the same time, vigorously advocate and support the research and development of degradable materials. As a high-tech product and an environmentally frien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L67/04C08K5/526
Inventor 任杰李申任天斌
Owner TONGJI UNIV
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