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Degradable plastic composition as well as preparation method and application thereof

A technology for degrading plastics and compositions, applied in the field of polymer materials, can solve the problems of poor comprehensive mechanical properties, poor mold release, and long molding cycle.

Active Publication Date: 2020-11-27
联泓(江苏)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing industrialized degradable plastics have the characteristics of slow crystallization speed, long molding cycle, large shrinkage rate, poor mold release, and poor comprehensive mechanical properties. Any single existing degradable resin is difficult to meet the requirements of plastics. Requirements for production process and performance of bottle caps

Method used

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  • Degradable plastic composition as well as preparation method and application thereof
  • Degradable plastic composition as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0059] Preparation method of degradable plastic:

[0060] Bake the degradable resin shown in Examples and Comparative Examples in a vacuum oven at 85°C for 6 hours, then fully mix the degradable resin, toughening agent, and compatibilizer in a high-speed mixer, and add a nucleating agent during the stirring process , anti-hydrolysis agent and chain extender, finally add smooth agent, and optionally add oxidant, mix well and then transfer it to the extruder with twin-screw and 11-section barrel with length-to-diameter ratio of 40-60 for melt extrusion The temperature of the barrel is 135-200° C. during melt extrusion, and the rotational speed of the extruder is 200-350 rpm during melt extrusion to obtain degradable plastics.

[0061]The barrel temperature of each section is: the temperature of the second section barrel is 125°C, the third section barrel temperature is 200°C, the fourth section barrel temperature is 190°C, the fifth section barrel temperature is 190°C, the sixth...

Embodiment 1

[0065] The raw materials of degradable plastics include the following components in parts by weight:

[0066] PLA: (from Total Corbien, model: L130, MI=10g / 10min 190°C, 2.16kg) 60 parts

[0067] PBS: (from Tunhe, Lanshan, model: TH803S, MI=18g / 10min 190°C, 2.16kg) 35.3 parts

[0068] Toughener: 2 parts of ethylene-methyl acrylate-glycidyl methacrylate (from Arkema AX8900, France)

[0069] Compatibilizer: PLA-g-MAH (maleic anhydride graft rate 0.85%, MI=16g / 10min 190°C, 2.16kg) 1 part

[0070] Chain extender: (derived from BASF ADR 4370F, France, with 9 epoxy functional groups) 0.1 parts

[0071] Anti-hydrolysis agent: (from Rheinland, Germany, BioAdimide100, monomeric carbodiimide, molecular weight 362g / mol) 0.1 part

[0072] Nucleating agent: amide nucleating agent (from Shanxi Institute of Chemical Industry TMC-306) 0.1 parts

[0073] Talc powder (10000 mesh particle size) 1 part

[0074] Slippery agent: erucamide 0.1 parts

[0075] Antioxidant 168 0.1 parts

[0076] ...

Embodiment 2

[0078] The raw materials of degradable plastics include the following components in parts by weight:

[0079] PLA: (from Total Corbien, model: L130, MI=10g / 10min 190°C, 2.16kg) 70 parts

[0080] PBS: (from Tunhe, Lanshan, model: TH803S, MI=18g / 10min 190°C, 2.16kg) 26.1 parts

[0081] Toughener: (from Arkema AX8900, France) 1 part

[0082] Compatibilizer: PLA-g-MAH (maleic anhydride graft rate 1.05%, MI=9g / 10min 190°C, 2.16kg) 1 part

[0083] Chain extender: (derived from BASF ADR 4370F, France, with 9 epoxy functional groups) 0.1 parts

[0084] Anti-hydrolysis agent: (from Rheinland, Germany, BioAdimide100, monomeric carbodiimide, molecular weight 362g / mol) 0.1 part

[0085] Nucleating agent: 0.2 parts of sorbitol nucleating agent (derived from Milliken 8000K)

[0086] Talc powder (10000 mesh particle size) 1 part

[0087] Slippery agent: erucamide 0.2 parts

[0088] Antioxidant 168 0.1 parts

[0089] Antioxidant 1010 0.2 parts.

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Abstract

The invention discloses a degradable plastic composition as well as a preparation method and application thereof. The degradable plastic composition comprises the following components in parts by weight: 70-99 parts of at least two degradable resins, 0-6 parts of a toughening agent, 0.5-5 parts of a compatilizer, 0.05-3 parts of a chain extender, 0.05-5 parts of an anti-hydrolysis agent, 0.05-5 parts of a nucleating agent and 0.05-3 parts of a slipping agent. By matching two or more degradable resins, the problem of poor toughness or rigidity of the existing single degradable resin is solved,so that the product has excellent comprehensive mechanical properties, excellent rigidity and toughness, high impact property, high nominal strain at break and higher flexural modulus and tensile strength.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a degradable plastic composition and its preparation method and application. Background technique [0002] With the advancement of human science and technology and the improvement of living standards, plastic bottles with the characteristics of large capacity, firmness, lightness, easy to carry, refrigerated and recyclable have been widely used in the field of liquid packaging in beverage, pharmaceutical and personal care industries. With the popularization of plastic bottle packaging in these fields, plastic bottle caps are increasingly reflecting its importance. As an important link in plastic bottle packaging, plastic bottle caps play a role in protecting product quality and shaping product personality. [0003] Affected by the rapid development of bottled beverages, bottled beverages have become the largest application field of plastic bottle caps. Plas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L23/08C08L51/08C08L25/14C08K13/02C08K5/29C08K5/053C08K3/34C08K5/20C08K5/526C08K5/134C08K5/372C08K3/36
CPCC08L67/04C08L2201/06C08L2205/02C08L2205/035C08L2203/10C08L2205/24C08L2205/025C08L67/02C08L23/0884C08L51/08C08L25/14C08K13/02C08K5/29C08K5/053C08K3/34C08K5/20C08K5/526C08K5/1345C08K5/372C08K3/36Y02W90/10
Inventor 李成浪李方
Owner 联泓(江苏)新材料研究院有限公司
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