Use of chain-extended ureas as latent curing agents and toughening modifiers for epoxy resin

被引：0

作者：

Zhang, BL ^{[1
]}

Zhang, HQ ^{[1
]}

You, YC ^{[1
]}

Du, ZJ ^{[1
]}

Ding, PY ^{[1
]}

Zhai, HC ^{[1
]}

Huang, JF ^{[1
]}

机构：

[1] Nankai Univ, Dept Chem, State Key Lab Funct Polymer Mat Adsorpt & Separat, Tianjin 300071, Peoples R China

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 1998年 / 19卷 / 11期

关键词：

epoxy resin; chain-extended urea; polyethylene glycol; latent curing agent; toughening modifier;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of chain-extended ureas(U-i) containing polyethylene glycol (PEG) flexible spacers were synthesized and the reactive activity, the storage property, dynamic mechanical behavior and impact strength of the epoxy resin/U-i/dibenzyl amine(DBA) system were studied, The results showed that the storage life of the epoxy resin/U-i/DBA system could be delayed to 40 h at 323 K and the impact strength of the epoxy resin/chain-extended urea containing PEG spacer with molecular weight 600/DEA system was about five times higher than that of the epoxy resin/urea without PEG spacer(U-0)/DBA system.

引用

页码：1837 / 1839

页数：3

共 8 条

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[5] SOME ASPECTS OF MONURON-ACCELERATED DICYANDIAMIDE CURE OF EPOXY RESINS
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[6] WADDILL HG, 1985, Patent No. 4518749
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