Manufacture of microcapsule
专利汇可以提供Manufacture of microcapsule专利检索，专利查询，专利分析的服务。并且PURPOSE:To obtain microcapsule which does not adhere to reactor from a high concentration but low viscosity of a capsule solution consisting of malamine and a formaldehyde resin, together with gum arabic and an ammonium salt. CONSTITUTION:Melamine and a formabldehyde resin in a formaldehyde resin/ melamine molal ratio=approx. 2-3 are dissolved in an aqueous solution of gum arabic, containing gum arabic in a gum arabic/melamine ratio=approx. 0.1-4 by weight. The aqueous gum arabic solution so obtained is heated with stirring to separate the melamine-formaldehyde polymer as a liquid solution phase, and then the particles of a core substance, e.g., natural mineral oil, an animal oil, etc., are enclosed by the liquid solution phase and the polycondensation reaction of the liquid sooution phase is continued to form an insoluble capsule wall. The polycondensation reaction is accelerated by the addition of an ammonium salt, e.g., ammonium chloride, etc. This method is most useful in the manufacture of microcapsule for pressure-sensitive recording papers, and can provide a 2-8 micron size of capsules from an enriched but low viscosity capsule solution at lower cost without the use of an exoensive high-molecular electrolyte, as in the conventional methods.，下面是Manufacture of microcapsule专利的具体信息内容。
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