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A modified polylactic acid resin composition and its preparation method and application

A technology of polylactic acid resin and composition, applied in the field of polymer materials, can solve problems such as affecting the degradation performance of polylactic acid, and achieve the effect of maintaining mechanical strength performance and good degradation rate

Active Publication Date: 2015-08-05
ZHEJIANG HISUN BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the non-degradable resin polycarbonate is added to the blend, which affects the degradation performance of polylactic acid

Method used

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  • A modified polylactic acid resin composition and its preparation method and application
  • A modified polylactic acid resin composition and its preparation method and application
  • A modified polylactic acid resin composition and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Modified polylactic acid resin composition, described composition comprises the weight portion of following composition:

[0046] Polylactic acid: 75 parts, the number average molecular weight is 1×10 5 ;

[0047] Toughening agent: 10 parts, described toughening agent is polybutylene succinate, and its number average molecular weight is 8 * 10 4 ;

[0048] Nucleating agent: 5 parts, described nucleating agent is talcum powder, and its mesh number is 2500 mesh;

[0049] Flame retardant: 10 parts, specifically, the flame retardant is 8 parts of melamine cyanurate and 2 parts of a copolymer of flame retardant acrylate and silazane, and the average number of acrylate segments and siloxane segments is The average molecular weight is about 5×10 4 .

[0050] The preparation method of above-mentioned modified polylactic acid resin composition preferably adopts following method to prepare:

[0051] Take 75 parts by weight of polylactic acid according to the ratio of the ab...

Embodiment 2

[0053] Modified polylactic acid resin composition, described composition comprises the weight portion of following composition:

[0054] Polylactic acid: 70 parts, number average molecular weight 1×10 4 ;

[0055] Toughening agent: 10 parts by weight, described toughening agent is adipic acid-co-butanediol-co-succinic acid copolymer, number average molecular weight is 9 * 10 4 ;

[0056] Nucleating agent: 5 parts by weight, the nucleating agent is calcium sulfate whisker, and the mesh number is 2000 mesh;

[0057] Flame retardant: 15 parts by weight, the flame retardant is 12 parts by weight of tricresyl phosphate and 3 parts by weight of a copolymer of flame retardant acrylate and siloxane, and each of the acrylate segment and the siloxane segment The number average molecular weight of the segment is about 5×10 4 .

[0058] The preparation method of the above-mentioned modified polylactic acid resin composition is consistent with the method described in Example 1, and wi...

Embodiment 3

[0060] Modified polylactic acid resin composition, described composition comprises the weight portion of following composition:

[0061] Polylactic acid: 70 parts by weight, the number average molecular weight is 5×10 5 ;

[0062] Toughening agent B2 adipic acid-co-butanediol-co-succinic acid copolymer: 5 parts by weight, and number average molecular weight 9×10 4 ;

[0063] Toughening agent B3 polycaprolactone: 5 parts by weight, number average molecular weight 7.5×10 4 ;

[0064] Nucleating agent: 5 parts by weight, the nucleating agent is wollastonite, and the mesh number is 3000 mesh;

[0065] Flame retardant melamine cyanurate: 8 parts by weight;

[0066] Flame retardant tricresyl phosphate: 5 parts by weight;

[0067] 2 parts by weight of copolymer of flame retardant acrylate and siloxane, the number average molecular weight of each segment of acrylate segment and siloxane segment is 5×10 4 .

[0068] The preparation method of the above-mentioned modified polylac...

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Abstract

The invention relates to a modified polylactic resin composition as well as a preparation method and an application thereof, belongs to the technical field of polymer materials and aims to solve the technical problem that the existing polylactic acid has no high toughness, high heat resistance and high flame retardancy at the same time. The modified polylactic resin composition comprises the following components in parts by weight: 50-90 parts of polylactic acid, 1.0-15 parts of a toughening agent, 0.5-15 parts of a nucleating agent and 1.0-25 parts of a flame retarding agent. In addition, the invention further provides a preparation method of the modified polylactic resin composition. The preparation method comprises the following steps of: mixing polylactic acid, the toughening agent, the nucleating agent and the flame retarding agent according to the proportion, and extruding and granulating in the melting state to obtain the modified polylactic resin composition. The modified polylactic resin composition has high toughness, high heat resistance, high flame retardancy and good processability and can be applied to engineering plastics. The preparation method of the modified polylactic resin composition is simple in process, high in processing efficiency and low in preparation cost and is easy to operate.

Description

technical field [0001] The invention relates to a modified polylactic acid resin composition and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] Polylactic acid is a kind of biodegradable resin. It is made of lactic acid as a monomer by polycondensation of lactic acid or by ring-opening polymerization of lactic acid dimer-lactide. Polylactic acid has good biodegradability. [0003] Polylactic acid (PLA) is the most produced degradable plastic product. It has high mechanical strength, but poor toughness and heat resistance. Therefore, there are many modifications for the toughness and heat resistance of PLA. After the modification of toughness and heat resistance, the comprehensive mechanical properties of polylactic acid have been significantly improved, and it has the potential to be used as engineering plastics, such as injection molded parts for small household appliances. As an engineering plas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08L53/02C08L53/00C08L101/00
Inventor 刘焱龙梁伟冯立栋项盛孙彬边新超陈志明宋辉斌朱荣华
Owner ZHEJIANG HISUN BIOMATERIALS