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A process for the preparation of low-viscosity body, melamine resin - solutions with a low content of free formaldehyde
A process for the preparation of low-viscosity body, melamine resin - solutions with a low content of free formaldehyde
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机译:一种低粘度的三聚氰胺树脂的制备方法-游离甲醛含量低的溶液
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摘要
Low-viscosity high-solids-content melamine-formaldehyde condensates having high reactivity, low content of free formaldehyde and good compatibility, are prepared by effecting condensation in an alcohol having up to 3 carbons, then concentrating the condensate and heating the concentrate in a higher alcohol having from 3 to 18 carbons and again concentrating. The final product cures on heating to a hard glossy film and can be added to other uncured resins to improve the hardness of their films.
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