12 月 7, 2021 隆昌化工

什么是 交联剂?

Quick answer: For wetting, leveling, defoaming, and dispersing topics, formulators usually compare performance and side effects together because over-correcting one surface issue can easily create another.

1.辅助交联剂是指一种能提高过氧化物交联效率的辅助剂,其中大部分是具有多不饱和官能团的化合物。辅助交联剂对交联效率的贡献通常被理解为提供更高浓度的反应位点、抑制副反应(如聚合物自由基歧化或链裂)以及帮助形成更多的交联键。

2.交联剂的具体使用效果不仅与其化学结构和添加量有关,还与聚合物类型和交联过氧化物等各种条件有关。

1.交联剂对物理性质的影响

使用交联助剂有助于提高交联密度。在物理性能方面,它表现为模量和硬度的增加,以及断裂伸长率和压缩永久变形的降低。在某些情况下,它还能提高拉伸强度、撕裂强度、耐热性、耐磨性或动态性能。
使用辅助交联剂对物理性能的影响主要体现在以下几个方面:(并非所有性能都能同时获得,有些性能可以通过使用特定的辅助剂来实现)


减少永久压缩组;

提高灵活性

提高模数

增加硬度;

降低橡胶粘度,提高加工性能;

提高耐油性;

提高耐热老化性;

提高橡胶和金属产品的附着力;

提高硫化速度;

减少过氧化物的用量;

提高拉伸强度

提高撕裂和热撕裂性能;

提高动态弯曲性能;

2.交联剂结构对交联剂性能的影响

交联剂的结构与交联剂的性能密切相关。交联剂官能团的类型、官能团的数量、桥键的结构、分子的极性、分子量等都会影响交联剂的性能。

官能团的类型和数量是影响交联剂硫化性能的主要参数,它直接影响交联剂的活性、在聚合物中的溶解度和产品的物理性能。常见的交联剂多为双官能团和三官能团添加剂;

桥键的结构,包括桥键的极性、桥键的长度和分子结构。虽然桥键的结构通常不会直接影响交联剂的活性,但它可能会影响交联剂的效率、在聚合物中的溶解度以及交联键的强度,这些也是非常重要的参数。;

分子量会影响交联剂的效率,也可作为交联剂挥发性的重要评估参数。如果分子量小,挥发性就可能高;
辅助交联剂的极性会直接影响其在聚合物中的溶解度和其他因素,从而影响硫化效率和性能;

3.交联助剂的分类

根据其对硫化的贡献,交联助剂可分为两类。一类是在提高硫化程度的同时还能提高硫化速度,也称为第一类交联剂;另一类是只提高硫化程度或交联密度而不提高硫化速度,也称为第二类交联剂。

立即联系我们!

请注明来源。 请在下表中填写您的联系信息,我们通常会在 24 小时内与您联系。您也可以给我发电子邮件 info@longchangchemical.com 请在工作时间(UTC+8 周一至周六,上午 8:30 至下午 6:00)或使用网站即时聊天工具获得及时回复。

How buyers usually evaluate coating and ink additives

Additive selection is usually most effective when the team defines the defect first and then screens compatibility, dosage range, and process stage. That is often much more reliable than choosing only by chemistry family or by a single dramatic lab result.

  • Start from the defect, not the additive name: wetting loss, crater, microfoam, and instability often need different solutions even inside the same formula.
  • Check compatibility at the intended dosage: the strongest additive can still be the wrong commercial choice if it narrows the process window too much.
  • Review the stage of use: some products are most useful during grind, while others matter more during let-down, filling, or final application.
  • Balance cure or film quality with defect control: the right additive fixes the problem without sacrificing adhesion, gloss, or appearance.

Recommended product references

  • CHLUMIAF 094: A balanced defoamer reference for waterborne coatings and many general foam-control screens.
  • CHLUMIAF 3062: Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.
  • CHLUMIAF 3037: A stronger process-defoaming option when persistent foam survives harsher conditions.
  • CHLUMIWE 3280: A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.

FAQ for buyers and formulators

Why does an additive that looks powerful in a beaker sometimes fail in production?
Because shear, temperature, substrate, and the full formula can all change the way the additive performs under real process conditions.

Should the most aggressive additive always be preferred?
Not usually. The best additive is the one that solves the real defect while preserving the broadest safe operating window.

发表回复

联系我们

Chinese