A new type of nylon material, its preparation method and its application in 3D printing

A new type of nylon technology, applied in the field of nylon materials, can solve the problems of nylon molecular structure and find solutions, so as to improve the mechanical properties and solve the effect of easy warping

Active Publication Date: 2022-03-11
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods only modify the appearance properties of nylon materials, and do not seek solutions from the characteristics of nylon molecular structure.

Method used

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  • A new type of nylon material, its preparation method and its application in 3D printing
  • A new type of nylon material, its preparation method and its application in 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Disperse 1mol of methyl methacrylate and 1mol of allylamine in 5000ml of methanol and water in a mixed solvent with a volume ratio of 1:1, add 0.01mol of EGDMA, 0.2mol of PVP K90, and 0.01mol of AIBN to the system in sequence, and then React at 60°C for 25 hours in a nitrogen environment, dehydrate and dry to obtain polymer a, and the number average molecular weight of polymer a is 105103Da as detected by GPC;

[0043] 2) Disperse 2.5 mol of polyamide 12 (1000) in 5000 mL of N-methylpyrrolidone, react with 5 mol of thionyl chloride and 0.05 mol of polymer a at 5°C under a nitrogen atmosphere for 5 hours, pour the product into hot water, and collect The precipitated product is polymer b, and the number average molecular weight of polymer b detected by GPC is 156890Da;

[0044] 3) Reflux 0.05 mol of polymer b and 8 mol of sodium hydroxide in methanol solvent at 80°C for 18 hours, remove the solvent by rotary evaporation, wash the obtained powder with sodium bicarbonate...

Embodiment 2

[0047] 1) Disperse 3 mol of ethyl acrylate and 1 mol of diallylamine in 20000 ml of methanol and water in a mixed solvent with a volume ratio of 1:1, add 0.03 mol of EGDMA, 0.3 mol of PVP K90, and 0.03 mol of AIBN to the system in turn, at 60 ℃, under nitrogen environment for 30 hours, dehydration and drying to obtain polymer a, the number average molecular weight of polymer a detected by GPC is 120965Da;

[0048] 2) Disperse 5 mol of polyamide 11 (1000) in 20,000 mL of N-methylpyrrolidone, react with 8 mol of oxalyl chloride and 0.05 mol of polymer a at 20°C under a nitrogen atmosphere for 0.5 h, pour the product into hot water, and collect the precipitate The product is polymer b, and the number average molecular weight of polymer b detected by GPC is 278539Da;

[0049] 3) Reflux 0.05mol of polymer b and 5mol of sodium hydroxide in methanol solvent at 60°C for 25 hours, remove the solvent by rotary evaporation, wash the obtained powder with sodium bicarbonate, dilute hydroch...

Embodiment 3

[0052] 1) Disperse 5 mol of ethyl acrylate and 1 mol of crotonic acid in 20000 ml of ethanol and water in a mixed solvent with a volume ratio of 1:1, add 0.02 mol of EGDMA, 0.5 mol of PVP K90, 0.1 mol of AIBN to the system in turn, at 70 ℃, Reaction under nitrogen environment for 20h, dehydration and drying to obtain polymer a, the number average molecular weight of polymer a detected by GPC is 113296Da;

[0053] 2) Disperse 4 mol of polyamide 11 (1000) in 20,000 mL of N-methylpyrrolidone, react with 8 mol of oxalyl chloride and 0.05 mol of polymer a at 10°C under a nitrogen atmosphere for 4 hours, pour the product into hot water, and collect the precipitated product That is, polymer b, the number average molecular weight of polymer b detected by GPC is 164008Da;

[0054] 3) Reflux 0.05mol polymer b and 10mol sodium hydroxide in methanol solvent at 75°C for 18h, remove the solvent by rotary evaporation, wash the obtained powder with sodium bicarbonate, dilute hydrochloric acid...

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Abstract

The invention provides a novel nylon material, a preparation method and its application in 3D printing. The preparation method of the nylon material comprises: 1) making acrylate monomers and functionalized olefin monomers under oxygen-free conditions Polymerization to prepare polymer a; 2) react the polyamide hard segment with the amine group or carboxyl group in polymer a to prepare polymer b; 3) dissolve polymer b, add alkali catalyst to hydrolyze its ester group generating carboxyl groups to prepare polymer c; 4) adding an esterification catalyst to react the carboxyl groups generated by the hydrolysis of polymer c with the hydroxyl groups in the soft segment of polyether polyol to prepare the nylon material. The nylon molecule prepared by the method of the present invention has a polyacrylate segment as the main chain, and a polyamide hard segment and a polyether polyol soft segment as side chains, which can solve the problem that nylon materials are easy to warp during 3D printing.

Description

technical field [0001] The invention relates to a nylon material, in particular to a novel nylon material, a preparation method and its application in 3D printing. Background technique [0002] 3D printing technology, also known as rapid prototyping technology, plays a significant role in product innovation because it can realize rapid printing of single-piece or small-batch products. According to different molding methods, 3D printing technology can be divided into three molding methods: stereolithography (SLA), fused deposition modeling (FDM), and selective laser sintering (SLS). Nylon, also known as polyamide, is an indispensable material in the injection molding industry and one of the most important 3D printing materials. [0003] Nylon 12 (PA12) is a commonly used nylon material. Due to its excellent impact resistance and fatigue resistance, it occupies a large market in the field of FDM technology as a crystalline plastic. However, materials such as nylon 12 have lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02C08F220/14C08F226/02C08F220/18C08F220/04C08F220/06B33Y70/00
CPCC08G81/028C08G81/025C08F220/14C08F226/02C08F220/18B33Y70/00C08F220/06C08F220/04
Inventor 杨伟翔刘彪高斌苑先佩曲振潘现路陈海波
Owner WANHUA CHEM GRP CO LTD
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