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Foamed biodegradable resin and production process thereof

A biodegradable resin and production process technology, applied in the field of polymer materials, to achieve the effects of low apparent density, increased cell density, and improved mechanical properties

Pending Publication Date: 2020-12-29
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

[0006] The existing foamed PLA is basically obtained by directly processing PLA with related foaming agents and other substances, and the stability and degradation performance of such products need to be improved

Method used

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  • Foamed biodegradable resin and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 50 parts of PLA in dichloromethane, then add nitric acid solution dropwise and carry out oxidation pretreatment at no higher than 60°C, then adjust the pH of the solution to 6-8, then cool to room temperature, and evaporate the solvent to obtain modified PLA . The obtained modified PLA was mixed with 2 parts of epoxy-functionalized ADR chain extender and 14 parts of polycaprolactone, and then baked at 60 ° C for 10 h, then added 2 parts of polyethylene glycol and thermoplastic starch (density: 1.2 g / cm 3 , melt index: 1-3g / 10min (190°C / 2.16kg), volatile matter <0.3%) 20 parts are mixed uniformly by the mixer, then added to the twin-screw extruder, blended at high temperature and high shear After extruding the die, the strands are air-cooled and sent to a pelletizer to pelletize to obtain biodegradable resin masterbatches. The obtained biodegradable resin masterbatch and 9 parts of compound polymer masterbatch of azodicarbonamide and sodium bicarbonate are mi...

Embodiment 2

[0030] Dissolve 40 parts of PLA in dichloromethane, then add nitric acid solution dropwise and carry out oxidation pretreatment at no higher than 60°C, then adjust the pH of the solution to 6-8, then cool to room temperature, and evaporate the solvent to obtain modified PLA . The obtained modified PLA was mixed with 2 parts of epoxy-functionalized ADR chain extender and 18 parts of polycaprolactone, and then baked at 60°C for 10 h, and then 2 parts of trimethylolpropane and thermoplastic starch (density: 1.2 g / cm 3, melt index: 1-3g / 10min (190°C / 2.16kg), volatile matter <0.3%) 25 parts are mixed uniformly by the mixer, then added to the twin-screw extruder, blended at high temperature and high shear After extruding the die, the strands are air-cooled and sent to a pelletizer to pelletize to obtain biodegradable resin masterbatches. Mix the obtained biodegradable resin masterbatch and 10 parts of compound polymer masterbatch of modified sodium bicarbonate and citric acid in a...

Embodiment 3

[0032] Dissolve 50 parts of PLA in dichloromethane, then add nitric acid solution dropwise and carry out oxidation pretreatment at no higher than 60°C, then adjust the pH of the solution to 6-8, then cool to room temperature, and evaporate the solvent to obtain modified PLA . The obtained modified PLA was mixed with 3 parts of epoxy-functionalized ADR chain extender and 18 parts of polyglycolic acid, and then baked at 60°C for 10 hours, and then 3 parts of polyethylene glycol and thermoplastic starch (density: 1.2g / cm 3 , melt index: 1-3g / 10min (190℃ / 2.16kg), volatile matter <0.3%) 10 parts are mixed uniformly by the mixer, then added to the twin-screw extruder, blended at high temperature and high shear After extruding the die, the strands are air-cooled and sent to a pelletizer to pelletize to obtain biodegradable resin masterbatches. Mix the obtained biodegradable resin masterbatch and 12 parts of compound polymer masterbatch of modified sodium bicarbonate and citric aci...

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Abstract

The invention discloses a foamed biodegradable resin which comprises the following raw material components in percentage by weight: 40-60% of PLA, 10-30% of thermoplastic starch, 8-16% of a combined foaming agent, 10-18% of a degradable auxiliary material, 1-3% of a chain extender and 1-3% of a cross-linking agent. The invention also discloses a production process of the foamed biodegradable resin. The foamed biodegradable resin disclosed by the invention is good in performance, and has excellent temperature resistance, biodegradability and foaming ratio.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a foaming biodegradable resin and a production process thereof. Background technique [0002] Polylactic acid (PLA) is a biodegradable polymer prepared by chemical synthesis using renewable plant resources as raw materials. PLA can be processed in various molding processes like ordinary polymers, such as extrusion, cast film, Blow molding, injection molding, bottle blowing, fiber molding, etc.; in addition, polylactic acid also has unique biocompatibility and biodegradability, therefore, as a biodegradable polymer material, polylactic acid has become a hot spots of concern. [0003] Polylactic acid (PLA) foaming materials can replace petroleum-based foaming plastics in packaging and consumer goods. At the same time, the application of polylactic acid foaming materials is also restricted by two major problems: one is the shortcomings of room temperature bri...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L67/04C08L71/02C08J9/10C08J9/08C08J9/12C08J9/00C08G63/91
CPCC08G63/912C08J9/0061C08J9/08C08J9/103C08J9/122C08J2203/02C08J2203/04C08J2203/06C08J2203/08C08J2303/02C08J2367/04C08J2403/02C08J2467/04C08J2471/02
Inventor 陈昌平
Owner NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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