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Biodegradable polyester composition

A technology of copolyester and composition, applied in the field of biodegradable copolyester composition, can solve the problems of insufficient heat resistance, mechanical properties, processing performance and anti-aging performance, high cost, limited application fields, etc. Production cost, excellent heat resistance, effect of widening application fields

Inactive Publication Date: 2009-08-19
马世金
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with traditional general-purpose plastics, these new materials have obvious deficiencies in heat resistance, mechanical properties, processing properties and anti-aging properties, and their high cost limits the application fields of products.

Method used

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  • Biodegradable polyester composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Polybutylene succinate 45Kg

[0020] Polylactic acid 50Kg

[0021] Dimethyl phthalate 2Kg

[0022] Talc powder 3Kg

[0023] Put the dried above-mentioned materials into a high-speed mixer and mix for 30 minutes, then enter into a twin-screw extruder, and make a biodegradable copolyester composition masterbatch in the twin-screw extruder. The temperature of each section of the twin-screw extruder is as follows: first section: 170°C; second section: 150°C; third section: 150°C; fourth section: 150°C; fifth section: 150°C;

Embodiment 2

[0025] Polybutylene succinate 58Kg

[0026] Polylactic acid 35Kg

[0027] Diethyl phthalate 2Kg

[0028] Talc powder 2Kg

[0029] Nano calcium carbonate 3Kg

[0030] Put the dried above-mentioned materials into a high-speed mixer and mix for 30 minutes, then enter into a twin-screw extruder, and make a biodegradable copolyester composition masterbatch in the twin-screw extruder. The temperature of each section of the twin-screw extruder is as follows: first section: 170°C; second section: 150°C; third section: 150°C; fourth section: 150°C; fifth section: 150°C;

Embodiment 3

[0032] Polybutylene succinate 68Kg

[0033] Polylactic acid 25Kg

[0034] Dimethyl phthalate 1Kg

[0035] Diethyl phthalate 1Kg

[0036] Bamboo powder 2Kg

[0037] Nano calcium carbonate 2Kg

[0038] Nanoscale titanium silicon composite agent 1Kg

[0039] Put the dried above-mentioned materials into a high-speed mixer and mix for 30 minutes, then enter into a twin-screw extruder, and make a biodegradable copolyester composition masterbatch in the twin-screw extruder. The temperature of each section of the twin-screw extruder is as follows: first section: 170°C; second section: 150°C; third section: 150°C; fourth section: 150°C; fifth section: 150°C;

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Abstract

The invention discloses a biodegradable copolyester compound which comprises the components with the weight percentage as follows: 45 percent to 90 percent of poly butylene succinate, 5 percent to 50 percent of poly lactic acid, 1 percent to 2 percent of plasticizer and 1 percent to 5 percent of filling, wherein, the plasticizer is at least one of dimethyl phthalate and diethyl phthalate; and the filling is at least one of talcum powder, bamboo powder, nanometer calcium carbonate and nanometer titanium-silicon complexing agent. The biodegradable copolyester compound integrates the advantages of various biodegradable materials to ensure that the biodegradable copolyester compound not only has good heat resistance, mechanical performance, processability and aging resistance but also reduces the production cost and develops the application field of the biodegradable material under the precondition of not changing the biodegradability.

Description

(1) Technical field: [0001] The invention relates to a biodegradable material, mainly to a biodegradable copolyester composition. (two) background technology: [0002] With the widespread use of plastics, plastic waste has become one of the main sources of environmental pollution. With the increasingly serious environmental pollution caused by plastic waste, countries around the world have introduced various measures to limit the use of traditional plastics. Biodegradable materials are one of the ideal materials to replace traditional plastics. Under the action of bacteria or enzymes, they can eventually degrade into substances such as carbon dioxide and water, which are harmless to the environment. At present, the biodegradable materials that realize industrial production mainly include polybutylene succinate (PBS for short), polylactic acid (PLA for short), and the like. However, compared with traditional general-purpose plastics, these new materials have obvious deficie...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04
Inventor 杨军谭鹏钱毓秀马世金
Owner 马世金
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