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Master batch for improving durability of polyglycolide (PGA) and preparation method of master batch

A polyglycolide, durable technology, used in the field of degradable plastic additives, can solve the problems of high melting processing temperature, PGA molecular weight drop, poor thermal stability, etc., to achieve easy operation, improve hydrolysis resistance, reduce degradation. Effect

Active Publication Date: 2020-06-19
JIANGSU JINJU ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, PGA is not suitable for multiple thermal processing modification, because firstly, the thermal stability of PGA material itself is poor, and the melting temperature is low. High, after a twin-screw granulation, the molecular weight of PGA will drop significantly

Method used

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  • Master batch for improving durability of polyglycolide (PGA) and preparation method of master batch
  • Master batch for improving durability of polyglycolide (PGA) and preparation method of master batch
  • Master batch for improving durability of polyglycolide (PGA) and preparation method of master batch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A masterbatch for improving the durability of polyglycolide, the preparation method of which is as follows:

[0049] ① Weigh 100 parts by mass of polylactic acid PLA, 30 parts of acid neutralizing agent calcium carbonate, 5 parts of polycarbodiimide as carboxyl-terminated agent, 5 parts of toluene diisocyanate as hydroxyl-terminated agent, and 5 parts of anti-hydrolysis agent vinyltrimethoxy 10 parts of base silane, 2 parts of grafting agent dicumyl peroxide, 3 parts of auxiliary grafting agent polyvinyl acetate (molecular weight 100,000), 5 parts of dispersant calcium oleate were mixed in a high mixer for 5 minutes, and then mixed in Extrude and granulate at 180-210°C in a twin-screw extruder;

[0050] ② Mix the granules obtained in step ① with 0.5 parts of compatibilizer titanium acetylacetonate in a high mixer for 5 minutes, and then extrude and granulate them in a twin-screw extruder at 150-180 ° C to obtain the improved Polyglycolide durability masterbatch.

[00...

Embodiment 2

[0055] range needs

[0056] A masterbatch for improving the durability of polyglycolide, the preparation method of which is as follows:

[0057] ①Weigh 100 parts by mass of polylactic acid PLA, 300 parts of acid neutralizing agent calcium carbonate, 50 parts of carboxy-blocking agent monomer carbodiimide, 5 parts of hydroxyl-blocking agent hexamethylene diisocyanate, anti-hydrolysis agent 3 parts of vinyltriethoxysilane, 0.5 parts of grafting agent 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, auxiliary grafting agent polyvinyl acetate (molecular weight 10 10,000) 0.5 parts, 3 parts of dispersant calcium oleate were mixed in a high mixer for 5 minutes, and then extruded and granulated in a twin-screw extruder at 180-210 °C;

[0058] ② Mix the granules obtained in step ① with 2 parts of compatibilizer in a high mixer for 5 minutes, and then extrude and granulate them in a twin-screw extruder at 150-180 ° C to obtain the polyglycol compound of the present invention. Masterbatc...

Embodiment 3

[0063] With embodiment 1, but acid neutralizer consumption obviously increases

[0064] ① Weigh 100 parts by mass of polylactic acid PLA, 250 parts of acid neutralizing agent calcium carbonate, 5 parts of polycarbodiimide as carboxyl-terminated agent, 5 parts of toluene diisocyanate as hydroxyl-terminated agent, and 5 parts of anti-hydrolysis agent vinyltrimethoxy 10 parts of base silane, 2 parts of grafting agent dicumyl peroxide, 3 parts of auxiliary grafting agent polyvinyl acetate (molecular weight 100,000), 5 parts of dispersant calcium oleate were mixed in a high mixer for 5 minutes, and then mixed in Extrude and granulate at 180-210°C in a twin-screw extruder;

[0065] ② Mix the granules obtained in step ① with 0.5 parts of compatibilizer titanium acetylacetonate in a high mixer for 5 minutes, and then extrude and granulate them in a twin-screw extruder at 150-180 ° C to obtain the improved Polyglycolide durability masterbatch.

[0066] Table 1 lists the evaluation te...

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Abstract

The invention relates to a master batch for improving durability of polyglycolide (PGA). The master batch is prepared from the following components in parts by mass: 100 parts of matrix resin, 30-300parts of an acid neutralizer, 5-50 parts of a carboxyl end-capping reagent, 5-50 parts of a hydroxyl end-capping reagent, 3-10 parts of an anti-hydrolysis agent, 0.5-2 parts of a grafting agent, 0.5-3parts of an auxiliary grafting agent, 1-5 parts of a dispersing agent and 0.5-2 parts of a compatilizer. The master batch for improving the durability of polyglycollide has the characteristics of convenience in processing and use and small addition amount, can be mixed with polyglycollide particles for injection molding or extrusion processing, and has an excellent effect in improving the durability and shelf life of a polyglycollide product in a room-temperature environment.

Description

technical field [0001] The invention belongs to the field of degradable plastic additives. Background technique [0002] biodegradable plastic more and more people's attention. Most plastics have the characteristics of low density, easy processing and good durability, etc., and are widely used in our daily life. However, when plastic is discarded and thrown into the environment, its non-degradable characteristics will bring serious environmental pollution. [0003] Polylactic acid (referred to as PLA) It is a widely used degradable plastic. However, the degradation of PLA needs to be conditioned by industrial composting. In the natural environment, especially in seawater, the degradation rate of PLA is actually very slow. [0004] Polyglycolide (referred to as PGA , aka polyglycolic acid ) Relying on the development of coal chemical and petrochemical technology, a small amount of industrial production has been realized, and its main chain structure is as follows: ...

Claims

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Application Information

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IPC IPC(8): C08J3/22C08L67/04C08L79/00C08L31/04C08K13/02C08K3/26C08K5/29C08K5/5425C08K5/14C08K3/34B29B9/06B29C48/92
CPCC08J3/226B29B9/06B29C48/92C08J2467/04C08J2479/00C08J2431/04C08K13/02C08K2003/265C08K5/29C08K5/5425C08K5/14C08K3/34B29C2948/92704
Inventor 翁伟明吴维果贡秀君刘志刚孙朝晖
Owner JIANGSU JINJU ALLOY MATERIAL
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