There are provided methods for producing solid anhydrous methylolhydantoins. Initially, an aqueous stirrable medium is dehydrated and heated to yield a substantially anhydrous stirrable melt. The aqueous stirrable medium includes (A) a solute selected from the group consisting of (i) a dimethyloldimethylhydantoin, (ii) a hydantoin reactant, (iii) a formaldehyde source reactant, or (iv) a combination of any of the foregoing; and (B) optionally a catalyst. A molten system is then provided by adding, to the stirrable melt, a reactant mixture which includes (A)(i) the same or a different hydantoin reactant, (ii) a substantially anhydrous formaldehyde source reactant which may be the same as or different than the formaldehyde source reactant, or (iii) a combination thereof; and (B) optionally, the same or a different catalyst; wherein the molten system includes (i) at least one hydantoin reactant and (ii) at least one dehydrated formaldehyde source reactant or substantially anhydrous formaldehyde source reactant.
提供了制备无
水甲醛基
肼固体的方法。首先,将可搅拌的
水介质脱
水并加热,得到基本无
水的可搅拌熔体。
水介质包括(A)所选的溶质,包括(i)二甲基二甲酰
肼,(ii)
肼反应物,(iii)
甲醛源反应物,或(iv)以上任何一种的组合;以及(B)可选的催化剂。然后通过向可搅拌的熔体中加入反应物混合物来提供熔融系统,其中反应物混合物包括(A)(i)相同或不同的
肼反应物,(ii)基本无
水的
甲醛源反应物,可以与
甲醛源反应物相同或不同,或(iii)两者的组合;以及(B)可选的相同或不同的催化剂;其中熔融系统包括(i)至少一个
肼反应物和(ii)至少一个脱
水的
甲醛源反应物或基本无
水的
甲醛源反应物。