This paper mainly presents the effect of secondary adding formaldehyde on the properties of UF Resin and puts forward the best way to select the producing technology.
本文主要介绍了二次甲醛投料对脲醛树脂性能的影响以及提出选择生产工艺的最佳方案。
This paper also indicated that the yield of formaldehyde may be increased obviously by adding some water to methylal.
文中提出在原料中添加适量水可以显著提高甲醛收率。
Phenolic resin was synthesized mainly from phenol and formaldehyde as raw material. The phenolic foam was prepared by adding foam stabilizer, foaming and curing agent.
以苯酚、甲醛为主要原料合成了可发性碱催化酚醛树脂，并加入匀泡剂、发泡剂和固化剂制备了酚醛泡沫。
The water resistant low formaldehyde content urea-formaldehyde resin was prepared by adding hydrophobic resin and formaldehyde collecting agent.
采用加入疏水性树脂和甲醛捕捉剂的方法对脲醛树脂进行了改性。
Cardanol modified phenolic formaldehyde resin was synthesized by using phenol 100 PHR, cardanol 40 PHR and adding an additive agent.
用100份苯酚(以质量计)，加入40份腰果酚，并加入一种助剂合成腰果酚改性酚醛树脂。
Adding amylum or oxidized amylum in the synthesis process of low toxic urea-formaldehyde resin can improve pre-press capability and bonding strength of plywood.
在低毒脲醛树脂胶粘剂合成过程中加入淀粉或氧化淀粉，能有效地改善胶合板板坯的预压性能和胶合板的胶接强度。
Free formaldehyde content in resin is reduced through beetle modification, and the toxicity is thus reduced. The toughness of resin has been increased after adding modifier.
通过对脲醛树脂的合成改性，降低了树脂中游离甲醛含量，减小了毒性，加入改性剂后增加了树脂韧性。
When the mass ratio of B/KNO3 keeps constant, the ignition powder adding fluorine rubber binder is less sensitive than that of phenol formaldehyde resin.
而静电感度则降低，当B/KNO3配比一定时，添加相同的粘结剂氟橡胶比添加酚醛树脂更钝感。
When the mass ratio of B/KNO3 keeps constant, the ignition powder adding fluorine rubber binder is less sensitive than that of phenol formaldehyde resin.
而静电感度则降低，当B/KNO3配比一定时，添加相同的粘结剂氟橡胶比添加酚醛树脂更钝感。
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