结果表明： 脲醛比、 淀粉种类和氧化程度是影响游离甲醛含量和固含量的主要因素；

Those factors occurred in the synthetical technics of modified urea-formaldehyde resin with starchy oxide.

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天然环保：原淀粉提炼精成，无甲醛。

Natural environmental: Extracted from native starch, formaldehyde-free.

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讨论了聚乙烯醇缩甲醛胶、聚醋酸乙烯酯胶、脲醛胶、淀粉胶的改性途径，介绍了各改性产品的配方及其性能比较。

Ways to modify the gels of polyvinyl formal, polyvinyl acetate, urea-formaldehyde and amylum are plesented and formulae and alternate properties of various modified products introduced.

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