cycloaliphatic epoxy resin s-利来国际w66

3d打印技术/3d print technology

光固化3d打印技术是3dp领域中制件成型效率和精度最高的一种技术。该材料目前存在的主要问题是韧性差和固化体积收缩率高。

uv-curing 3d printing is considered as the most precise and most efficient modeling and forming technology in the 3dp field. main problems of this material are poor toughness and high cured volume shrinkage.

常用预聚物/common prepolymers

常用预聚物分为以下几种类型，它们的性能特点也各不相同。

commonly used prepolymers can be divided into the following types, and their performance characteristics are also different.

目前常用的阳离子型预聚物是环氧树脂和乙烯基醚类树脂。乙烯基醚类树脂由于固化速度慢，适用范围窄。环氧树脂分为缩水甘油醚（或酯）类环氧树脂和脂环族环氧树脂等两类。缩水甘油醚（或酯）类环氧树脂由于活性低、反应慢和生成的聚合物分子量低在阳离子光固化领域一直处于劣势地位。脂环族环氧树脂由于具有活性高、反应过程中产生的收缩小、粘度低及毒性低等优点，一直在阳离子光固化领域处于优势地位。

the commonly used cationic prepolymers are epoxy resins and vinyl ether resins. vinyl ether resins have a narrow application range due to their slow curing speed. epoxy resins are divided into two categories: glycidyl ether (or ester) epoxy resins and cycloaliphatic epoxy resins. glycidyl ether (or ester) epoxy resins have always been at a disadvantage in the field of cationic uv curing due to their low activity, slow reaction and low molecular weight of the resulting polymer. cycloaliphatic epoxy resins have always been in a dominant position in the field of cationic uv curing due to their high activity, small shrinkage during reaction, low viscosity and low toxicity, etc.

新纳希s-28/synasia s-28

s-28

cas-3130-19-6

syna-epoxy 28是一种标准的脂环族环氧树脂，适用于需要更高粘度或更柔韧薄膜的众多应用中。

· 可以进行光固化

· 可以和酸酐进行热固化

· 韧性高

syna-epoxy 28 is a standard cycloaliphatic epoxy resin suitable for use in many applications, where higher viscosity or more flexible films are required.

• uv curable

• thermally curable with anhydrides

• high toughness

规格参数

specifications

相关实验研究

根据相关学者研究发现，选取环氧丙烯酸酯ea以及脂环族环氧树脂s-28作为预聚物，由于s-28的粘度比ea小，因此加大其用量必然导致3d打印材料的粘度降低。s-28以阳离子聚合方式参加光固化反应，其光固化速度较自由基体系固化速度慢，随着s-28含量增加，3d打印材料的光固化速度降低。自由基型预聚物环氧丙烯酸酯参加聚合反应时体积收缩率较阳离子型预聚物环氧树脂体积收缩率大，所以随着s-28含量增加，3d打印材料的体积收缩率降低。

experimental research

according to the research, some scholars choose epoxy acrylate ea and cycloaliphatic epoxy resin s-28 as prepolymers. since the viscosity of s-28 is lower than that of ea, increasing its dosage will inevitably lead to a decrease in the viscosity of 3d printing materials. s-28 participates in the uv-curing reaction by cationic polymerization, and its uv-curing speed is slower than that of free radical systems. with the increase of s-28 dosage, the uv-curing speed of 3d printing materials decreases. the volume shrinkage rate of free-radical epoxy acrylate prepolymer is larger than that of cationic epoxy resin prepolymer when it participates in the polymerization reaction. as the dosage of s-28 increases, the volume shrinkage rate of 3d printing materials decreases.

实验结果

通过大量实验研究和总结分析，选择了力学性能佳的预聚物ea和s-28，稀释效果较好的稀释剂tmptma和dve-3，引发自由基/阳离子混杂光固化体系效率高的itx及irgacure 250复配光引发剂，助引发剂6420-tf以及多羟基化合物pas-12作为高韧性混杂固化型3d打印材料的主要组分。

experimental results

after a large number of experimental studies and summary analysis, when the prepolymers ea and s-28 with good mechanical properties are selected, the diluents tmptma and dve-3 can offer a better dilution effect. the photoinitiators itx and irgacure 250 are highly efficient in initiating free radical/cationic hybrid uv-curing systems. the co-initiator 6420-tf and polyhydroxy compound pas-12 are also used as the main component of the high toughness hybrid cured 3d printing material. 

南通新纳希新材料有限公司是全球领先的脂环族环氧树脂生产商，可提供s-06e、s-21、s-28等多种牌号，欢迎广大客户来电垂询。

nantong synasia new material co., ltd. is the world's leading manufacturer of cycloaliphatic epoxy resins. we can provide a variety of product grades such as s-06e, s-21, s-28, etc. welcome all customers to contact or call us.