Microcapsules having walls made of polyisocyanate/guanidine reaction
products
    4.
    发明授权
    Microcapsules having walls made of polyisocyanate/guanidine reaction products 失效
    微胶囊具有由多异氰酸酯/胍反应产物制成的壁

    公开(公告)号:US5635211A

    公开(公告)日:1997-06-03

    申请号:US391990

    申请日:1995-02-21

    摘要: Novel microcapsules are characterized in that their walls are made of reaction products of guanidine compounds and polyisocyanates or contain such reaction products. Dispersions containing such microcapsules can be prepared by replacing the amines, amino alcohols or hydrazine compounds in processes known per se for preparing microcapsule dispersions from polyisocyanates and amines, amino alcohols or hydrazine compounds by guanidine compounds. The present invention also relates to no-carbon copy papers containing dyestuff precursors in microcapsules whose walls are made of reaction products of guanidine compounds and polyisocyanates or contain such reaction products.

    摘要翻译: 新型微胶囊的特征在于它们的壁由胍化合物和多异氰酸酯的反应产物制成或含有这种反应产物。 含有这种微胶囊的分散体可以通过以本身已知的方法代替胺,氨基醇或肼化合物来制备,以通过胍化合物从多异氰酸酯和胺,氨基醇或肼化合物制备微胶囊分散体。 本发明还涉及在微胶囊中含有染料前体的无碳复写纸,其壁由胍化合物和多异氰酸酯的反应产物形成或含有这些反应产物。

    Process for microencapsulation using oil-soluble emulsifiers
    9.
    发明授权
    Process for microencapsulation using oil-soluble emulsifiers 失效
    使用油溶性乳化剂的微胶囊化方法

    公开(公告)号:US5650102A

    公开(公告)日:1997-07-22

    申请号:US541992

    申请日:1995-10-06

    CPC分类号: B01J13/16 Y10S514/963

    摘要: In the process for the preparation of microcapsule dispersions by an interface polyaddition process in which an oil-in-water emulsion is prepared from an oily phase, which comprises the substance to be encapsulated and a lipophilic substance capable of polyaddition, and on aqueous phase, and the reaction partner required for the polyaddition is then added to the aqueous phase, capsules with smaller particle sizes are obtained, with a saving in emulsifying energy, if an oil-soluble emulsifier is added to the oily phase before the emulsification.

    摘要翻译: 在通过界面加聚方法制备微胶囊分散体的方法中,其中由包含被包封的物质和能够加成的亲脂性物质的油相和水相制备水包油乳液, 然后将加聚物所需的反应配体加入到水相中,如果在乳化之前将油溶性乳化剂加入到油相中,则获得具有较小颗粒尺寸的胶囊,从而节省乳化能量。