Material capable of realizing ultraviolet-light crosslinking and application thereof to 3D printing material

A 3D printing and crosslinking agent technology, which is applied in the field of ultraviolet 3D printing crosslinked polyester materials and its preparation, can solve the problems of slow crosslinking speed and unsuitability for the application of 3D printing materials, and achieve low production cost and easy Effect of industrial production and improvement of molding efficiency

Active Publication Date: 2014-08-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even though the melt strength of the final cross-linked PBS is high and the performance of the final product after cross-linking is good, the cross-linking speed is too slow, and poisonous organotin needs to be added as a catalyst, so it is not suitable for the application of 3D printing materials.

Method used

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  • Material capable of realizing ultraviolet-light crosslinking and application thereof to 3D printing material
  • Material capable of realizing ultraviolet-light crosslinking and application thereof to 3D printing material
  • Material capable of realizing ultraviolet-light crosslinking and application thereof to 3D printing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Preparation of aliphatic polyester prepolymers containing double bonds

[0048] At room temperature, add 1,4-butanedioic acid, fumaric acid, 1,4-butanediol, zinc chloride and hydroquinone at a molar ratio of 1:1:2:0.01:0.005, totaling 2500g, and add it to high purity nitrogen Replaced in a 5L reactor. At the same time, the reactor is equipped with a high-purity nitrogen inlet, a mechanical stirrer, and a condenser. The above reaction system is controlled at 150°C, and the reaction is stirred with nitrogen until the water output reaches 95% of the theoretical water output, then the polycondensation catalyst (butyl titanate) 0.05g / 100g polymer is added, the pressure is slowly reduced to 50Pa, and then polycondensation 9 hours. The PBS copolyester is obtained, and its structural formula is shown in formula 2. According to the integrated area of ​​the hydrogen NMR spectrum, the number average molecular weight can be calculated to be 26,000.

[0049]

[0050] Formula 2

[0...

Embodiment 2

[0055] 1) Preparation of aliphatic polyester prepolymers containing double bonds

[0056] At room temperature, first add 2500g of succinic acid, maleic anhydride, 1,4-butanediol, zinc chloride and hydroquinone at a molar ratio of 0.96:0.04:2:0.01:0.003 to 5L replaced with high purity nitrogen In the reactor. At the same time, the reactor is equipped with a high-purity nitrogen inlet, a mechanical stirrer, and a condenser. The above reaction system is controlled at 250°C, and the reaction is stirred with nitrogen until the water output reaches 95% of the theoretical water output, then a polycondensation catalyst (stannous octoate) 0.5g / 100g polymer is added, the pressure is slowly reduced to 5Pa, and then polycondensation 3 hour. The PBS copolyester is obtained. According to the integrated area of ​​the proton NMR spectrum, the number average molecular weight can be calculated to be 1000.

[0057] 2) Combine 98.15 parts of the aliphatic polyester prepolymer obtained in step 1) w...

Embodiment 3

[0061] 1) Preparation of aliphatic polyester prepolymers containing double bonds

[0062] At room temperature, first add 2500g of succinic acid, fumaric acid, maleic anhydride, 1,4-butanediol, zinc chloride and hydroquinone at a molar ratio of 0.8:0.1:0.1:2:0.1:0.05 to the high In a 5L reactor replaced by pure nitrogen. At the same time, the reactor is equipped with a high-purity nitrogen inlet, a mechanical stirrer, and a condenser. The above reaction system was controlled at 180°C, and the reaction was stirred with nitrogen until the water output reached 95% of the theoretical water output. Then, the polycondensation catalyst (isopropyl titanate) 0.5g / 100g polymer was added, and the pressure was slowly reduced to 5Pa. Polycondensation for 3 hours. The PBS copolyester is obtained. According to the integrated area of ​​the proton NMR spectrum, the number average molecular weight can be calculated to be 13,000.

[0063] 2) Combine 96.5 parts of the aliphatic polyester prepolymer...

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Abstract

A provided modified PBS material is characterized by comprising, in parts by weight, 90-99 parts of copolyester, 0.05-5 parts of an initiator, 1-5 parts of a crosslinking agent and 0-0.8 part of an anti-oxidant. The copolyester is a copolyester of succinic acid and/or anhydride thereof, and an unsaturated dicarboxylic acid and/or anhydride thereof, and 1,4-butanediol, and an optional other aliphatic dibasic acid and/or anhydride thereof and/or dihydric alcohol. The material is environment-friendly, has relatively high heat distortion temperature and mechanical strength, and has important industrial application value.

Description

Technical field [0001] The invention relates to a 3D printing material and a preparation method thereof, in particular to a polyester material used for ultraviolet 3D printing crosslinking and a preparation method thereof. Background technique [0002] 3D printing technology, also known as additive manufacturing technology, is actually an emerging technology in the field of rapid prototyping. It is a form of laminated manufacturing technology based on digital model files. The principle is Add materials in layers to create a three-dimensional solid object. At present, 3D printing technology has been widely used in product prototypes, mold manufacturing, artistic creation, jewelry making, medical equipment, bioengineering, construction, aviation, automobile manufacturing and other fields, opening up a broad space for innovation. Melt extrusion accumulation molding technology (FDM) is a common technical process in 3D printing technology. The principle is to use thermoplastic polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08G63/52
Inventor 郑柳春李春成肖耀南管国虎朱文祥符文鑫林学春马永梅孙文华徐坚董金勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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