| 摘要 |
Oligomeric cyanoguanidines of formula I (see fig.I) wherein, for example, R1 and R2 are each phenyl, R is 1,4-phenylene and n is an integer from 1 to 20, are suitable latent hardeners for epoxy resins. They are readily soluble in solvents suitable for the application of epoxy resins, and the cured products obtained therewith have a high glass transition temperature.
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