Method of making oil-containing microcapsules
    3.
    发明授权
    Method of making oil-containing microcapsules 失效
    含油微胶囊的制备方法

    公开(公告)号:US4219439A

    公开(公告)日:1980-08-26

    申请号:US892317

    申请日:1978-03-31

    IPC分类号: B01J13/10 B41M5/165 B01J13/02

    摘要: The method of making oil-containing microcapsules comprises the steps of (1) preparing an aqueous system comprising an aqueous solution of at least two kinds of hydrophilic colloid materials with opposite electric charges and oil droplets dispersed in said solution (2) causing coacervation in said aqueous system at a temperature above the gelation points of said hydrophilic colloid materials to form a coacervate suspension in which each of said oil droplets is surrounded by a coacervate and (3) cooling said coacervate suspension to a temperature below the gelation points of said hydrophilic colloid materials to form multi-nucleus capsules. During the step of cooling the coacervate suspension, aggregation of particles of oil droplets each having a coacervate therearound is controlled by an agitation flow so as to allow formation of multi-nucleus microcapsules having an average diameter within the range of 3 to 20 microns. Aggregation of particles of oil droplets each having a coacervate therearound is controlled by an agitation flow produced by rotating at least one agitator in a vessel containing the coacervate suspension under the special conditions.

    摘要翻译: 制备含油微胶囊的方法包括以下步骤:(1)制备含有至少两种具有相反电荷的亲水胶体材料的水溶液和分散在所述溶液(2)中的油滴的水溶液体系的水系统, 水系统在高于所述亲水胶体材料的凝胶化点的温度下形成凝聚层悬浮液,其中每个所述油滴被凝聚层包围,和(3)将所述凝聚层悬浮液冷却至低于所述亲水胶体凝胶点的温度 材料形成多核胶囊。 在冷却凝聚物悬浮液的步骤期间,通过搅拌流控制每个具有凝聚层的油滴颗粒的聚集,以便形成平均直径在3至20微米范围内的多核微胶囊。 通过在特殊条件下使包含凝聚物悬浮液的容器中的至少一个搅拌器旋转而产生的搅拌流量来控制每个具有凝聚层的油滴颗粒的聚集。

    Aqueous dispersion of a developer for pressure-sensitive recording sheet
and a process for producing the same
    6.
    发明授权
    Aqueous dispersion of a developer for pressure-sensitive recording sheet and a process for producing the same 失效
    用于压敏记录片材的显影剂的水分散体及其制备方法

    公开(公告)号:US4950330A

    公开(公告)日:1990-08-21

    申请号:US405063

    申请日:1989-09-07

    IPC分类号: B41M5/155

    CPC分类号: B41M5/155

    摘要: An aqueous dispersion of a developer for pressure-sensitive recording sheet, having superior handling performance and storage stability in a high concentration and a process for producing the dispersion are provided, which developer is expressed by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different and represent H, halogen, alkyl of 1 to 9 carbon atoms, alkylene, cycloalkyl, cycloalkylene, phenyl, nucleus-substituted phenyl, aralkyl or nucleus-aralkyl; adjacent two of R.sub.1 to R.sub.4 may form a ring; n is an integer of one or more; and M is Mg, Ca, Zn, Al, Fe, Co, Ni or a basic ion of the foregoing, and which developer has a softening point of 30.degree. C. or higher and is dispersed in water, containing a dispersing agent, the size of particles of the developer being 0.3 to 5.mu. in terms of average particle diameter, and the proportion of right spherical particles in the total particles being 50% or more; and which process comprises emulsifying-dispersing the developer in water containing a dispersing agent at a temperature higher by at least 30.degree. C. than the softening point of the developer, follower by cooling, or dissolving the developer in an organic solvent, emulsifying-dispersing the solution in water containing a dispersing agent and distilling off the solvent from the dispersion on heating, or using a polyvinyl alcohol having a polymerization degree of 500 or more and a saponification degree of 70% or more.

    Pressure sensitive manifold paper
    7.
    发明授权
    Pressure sensitive manifold paper 失效
    压敏歧管纸

    公开(公告)号:US4489336A

    公开(公告)日:1984-12-18

    申请号:US380393

    申请日:1982-05-20

    IPC分类号: B41M5/132 B41M5/165 B41M5/22

    CPC分类号: B41M5/132 B41M5/1655

    摘要: A pressure sensitive manifold paper is prepared with use of microcapsules having enclosed therein an organic solvent, a color former contained in the solvent, and an alkylphenol compound and/or a mercaptan added to the solvent. The paper affords prints resistant to light and has a color forming layer which remains free of coloration and gives prints of original color even when exposed to light.

    摘要翻译: 使用其中封入了有机溶剂,包含在溶剂中的着色剂和加入到溶剂中的烷基酚化合物和/或硫醇的微胶囊制备压敏集成纸。 该纸提供耐光照的印刷品,并且具有保持不着色的成色层,即使在曝光时也能给出原色的印刷品。