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A rapid prototyping degradable composite material and its preparation method

A composite material and fast technology, applied in the field of rapid prototyping and degradable composite materials and its preparation, can solve the problems of product deformation, low effective efficiency, and inability to produce high-gloss products on the surface, and achieve low cost, convenient processing, and improved overall mechanics. Performance and Stability Effects

Active Publication Date: 2021-08-24
中环广东生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The patent with the publication number CN105153659 A discloses a heat-resistant polylactic acid composite material and its preparation method, but the polylactic acid products prepared by this material need to be baked in an oven at 100-105°C for 0.5-2 hours after molding to have Heat resistance, low efficiency
In addition, due to the out-of-mold crystallization process, the product is prone to serious deformation during the baking process, and it is impossible to produce a product with a high-gloss surface.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A rapid prototyping degradable composite material consists of the following components in parts by mass:

[0044] 50 parts of polylactic acid;

[0045] 50 parts of polyglycolic acid;

[0046] 50 parts of carboxylated toughening agent;

[0047] 30 parts of carboxyl blocking agent;

[0048] 10 parts of viscosifying foaming agent;

[0049] 0.5 part of active regulator;

[0050] Melt strength modifier 1 part.

[0051] Prepare as follows:

[0052] ① Weigh 50 parts by mass of PGA with a molecular weight of 300,000, 50 parts of polyadipic acid-terephthalic acid-butylene glycol copolyester grafted maleic anhydride (PBAT-g-MAH), Mix 0.5 parts of diethyl phosphate in a high mixer for 5 minutes, then extrude and granulate in a twin-screw extruder at a temperature of 180~235°C;

[0053] ② Mix 50 parts of PLA, 30 parts of epoxy resin E51, 10 parts of MDI, and 1 part of triethylenetetramine in the same mass fraction of the particles obtained in step ① in a high mixer for 5 min...

Embodiment 2

[0056] A rapid prototyping degradable composite material consists of the following components in parts by mass:

[0057] 80 parts of polylactic acid;

[0058] 20 parts of polyglycolic acid;

[0059] 5 parts of carboxylated toughening agent;

[0060] 5 parts of carboxyl blocking agent;

[0061] 5 parts of viscosifying foaming agent;

[0062] 0.5 part of active regulator;

[0063] Melt strength regulator 0.5 parts.

[0064] Prepare as follows:

[0065] ① Weigh 20 parts by mass of PGA with a molecular weight of 50,000, 5 parts of polybutylene succinate grafted maleic anhydride (PBS-g-MAH), and 0.5 parts of triphenyl phosphate in Mix in a high mixer for 5 minutes, then extrude and granulate in a twin-screw extruder at a temperature of 180~235°C;

[0066] ② Mix 80 parts of PLA, 5 parts of polycarbodiimide, 5 parts of HDI, and 0.5 parts of triethylenetetramine in the high mixer for 5 minutes, and then Extrude and granulate in a twin-screw extruder at a temperature of 180-205...

Embodiment 3

[0069] A rapid prototyping degradable composite material consists of the following components in parts by mass:

[0070] 70 parts of polylactic acid;

[0071] 30 parts of polyglycolic acid;

[0072] 30 parts of carboxylated toughening agent;

[0073] 30 parts of carboxyl blocking agent;

[0074] 5 parts of viscosifying foaming agent;

[0075] 1 part of active regulator;

[0076] Melt strength regulator 0.5 part.

[0077] Prepare as follows:

[0078] ① Weigh 30 parts by mass of PGA with a molecular weight of 200,000, 30 parts of thermoplastic polyurethane grafted maleic anhydride (TPU-g-MAH), and 1 part of diphenyl phosphate, and mix them in a high-mixer for 5 minutes , and then extrude and granulate in a twin-screw extruder at a temperature of 180~235°C;

[0079] ②Glycidyl methacrylate (PBAT-g -GMA), 5 parts of HDI, and 0.5 parts of triethylenetetramine were mixed in a high mixer for 5 minutes, and then extruded and granulated in a twin-screw extruder at a temperature ...

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Abstract

The invention relates to a rapid prototyping degradable composite material and a preparation method thereof. The material is composed of the following components in parts by mass: polylactic acid (PLA) 50-80, polyglycolic acid (PGA) 20-50, carboxyl It is composed of 5~50 parts of chemical toughening agent, 5~30 parts of carboxyl blocking agent, 1~10 parts of viscosifying foaming agent, 0.5~2 parts of activity regulator, and 0.5~1 part of melt strength regulator. The advantage of the present invention is that it combines dynamic crosslinking and foaming technology to prepare a rapidly prototyping degradable composite material, which overcomes the slow molding speed, poor toughness and low strength of conventional high temperature-resistant degradable composite materials. , product density and other disadvantages, the material can be used for disposable daily necessities and outdoor products, especially in disposable injection molding products with obvious advantages.

Description

technical field [0001] The invention belongs to the field of degradable plastics, and in particular relates to a rapid prototyping degradable composite material and a preparation method thereof. Background technique [0002] 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] In view of the above reasons, degradable plastics are attracting more and more attention. For example, polylactic acid (PLA) is a widely used degradable plastic. Lactic acid has optical isomerism, so its polymer polylactic acid can also be divided into left-handed polylactic acid (PLLA), right-handed polylactic acid (PDLA), and racemic polylactic acid. Considering various factors such as product performance and price, PLLA has become the most commonly used PLA vari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L51/08C08L51/06C08J9/08
CPCC08J9/08C08J2203/02C08J2367/04C08J2451/06C08J2451/08C08J2467/04
Inventor 束建军
Owner 中环广东生物科技有限公司