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A kind of copolyester suitable as 3D printing material and preparation method thereof

A 3D printing and copolyester technology, applied in the field of copolyester as a 3D printing material and its preparation, can solve the problems of large difference in melting point, high equipment requirements, complex methods, etc., and achieve excellent notched impact strength performance, thermal The effect of good stability and simple preparation process

Active Publication Date: 2018-02-23
KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to some defects of copolyester, its application in the field of 3D printing is limited.
[0005] Although the patent CN101016373A discloses a method for degradable copolyester of aromatic polyester and aliphatic polyester by reactive blending, the aliphatic polyester is severely degraded and discolored due to the large difference in melting point between the two; Patent CN104558557A discloses a method of obtaining low-viscosity resin through melt polycondensation, spreading the low-viscosity resin in a special film reactor, and performing film melt polycondensation to obtain ultra-high-viscosity polyester and polycarbonate materials, but the method is complicated. High equipment requirements and high cost

Method used

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  • A kind of copolyester suitable as 3D printing material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 232.4g (1.4mol) of terephthalic acid, 99.6g (0.6mol) of isophthalic acid, 4.04g (0.02mol) of sebacic acid, 77.91g (0.866mol) of 1,4-butanediol, 1,3 - 164.49g (2.164mol) of propylene glycol and 0.232g of tetrabutyl titanate were added to a 1L reaction kettle. The reaction kettle is equipped with stirring, temperature measuring system, rectification column and reflux condenser. After gradually raising the temperature to 100°C, the stirring is started. When the temperature is close to 175°C, water begins to distill out, and the distillation temperature is 98-100°C. Raise the temperature to about 215°C, and the esterification reaction ends when the water output reaches more than 95% of the theoretical value. Then add 1.328g of antioxidant and 33.2g of additives (talc powder) to carry out the reduced pressure polymerization reaction, gradually increase the temperature to 255°C and keep warm; the pressure in the reactor is gradually reduced to 50Pa and maintained for 2.5 hour...

Embodiment 2

[0024] 232.4g (1.4mol) of terephthalic acid, 99.6g (0.6mol) of isophthalic acid, 10.1g (0.05mol) of sebacic acid, 66.42g (0.738mol) of 1,4-butanediol, 1,3 - 224.352g (2.952mol) of propylene glycol and 0.239g of tetrabutyl titanate were added to a 1L reaction kettle. The reaction kettle is equipped with stirring, temperature measuring system, rectification column and reflux condenser. After gradually raising the temperature to 100°C, the stirring is started. When the temperature is close to 175°C, water begins to distill out, and the distillation temperature is 98-100°C. Raise the temperature to about 215°C, and the esterification reaction ends when the water output reaches more than 95% of the theoretical value. Then add 1.368g of antioxidant and 51.315g of additive (calcium carbonate) to carry out the reduced pressure polymerization reaction, gradually increase the temperature to 255°C and keep warm; the pressure in the reactor is gradually reduced to 50Pa and maintained for ...

Embodiment 3

[0026] 232.4g (1.4mol) of terephthalic acid, 99.6g (0.6mol) of isophthalic acid, 16.16g (0.08mol) of sebacic acid, 74.86g (0.832mol) of 1,4-butanediol, 1,3 - 189.64g (2.495mol) of propylene glycol and 0.244g of tetrabutyl titanate were added to a 1L reaction kettle. The reaction kettle is equipped with stirring, temperature measuring system, rectification column and reflux condenser. After gradually raising the temperature to 100°C, the stirring is started. When the temperature is close to 175°C, water begins to distill out, and the distillation temperature is 98-100°C. Raise the temperature to about 215°C, and the esterification reaction ends when the water output reaches more than 95% of the theoretical value. Then add 1.39g of antioxidant and 52.224g of additive (white carbon black) to carry out reduced-pressure compression polymerization reaction, gradually increase the temperature to 255°C, and keep warm; the pressure in the reactor is gradually reduced to 50Pa and mainta...

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Abstract

The invention discloses copolyester used as a 3D printing material and a preparation method thereof. Raw materials comprise binary acids composed of terephthalic acid, isophthalic acid and sebacic acid, diols composed of 1,4-butanediol and 1,3-propanediol diol, a catalyst, an antioxidant and additives. By modifying poly(terephthalic acid-m-phthalic acid-1,3-propanediol)ester with a small amount of sebacic acid and a small amount of 1,4-butanediol, a copolyester material which has good toughness, relatively low melting point, good heat stability and excellent mechanical property and is suitable for FDM type 3D printing is obtained.

Description

technical field [0001] The invention relates to a copolyester and a preparation method thereof, in particular to a copolyester suitable as a 3D printing material and a preparation method thereof. Background technique [0002] 3D printing technology is considered to be a major breakthrough in the world's manufacturing technology field in the past 20 years. It is a combination of rapid product development and flexible manufacturing technology. According to the three-dimensional CAD model, the bondable materials such as plastic, metal powder or solid inorganic powder pass through different types of nozzles, accumulate layer by layer on the workbench and finally form the target part. [0003] Fusion extrusion deposition molding (FDM) is a commonly used technical process in 3D printing technology. The more commonly used polymer material for FDM molding technology on the market is acrylic-butadiene-styrene terpolymer (ABS ), polylactic acid (PLA), polycarbonate (PC), nylon (PA), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/181C08G63/16C08K5/526C08K3/34C08K3/36C08K3/26B33Y70/00
CPCB33Y70/00C08G63/16C08G63/181C08G63/183C08K3/26C08K3/34C08K3/36C08K5/526C08K2003/265
Inventor 薛为岚余丹丹李哲龙朱万育曾作祥
Owner KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD