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    • 81. 发明授权
    • Capsule manufacture
    • 胶囊制造
    • US4490313A
    • 1984-12-25
    • US460704
    • 1983-01-24
    • Robert W. BrownRichard P. Bowman
    • Robert W. BrownRichard P. Bowman
    • B01J13/02B01J13/18B41M5/165
    • B01J13/18B41M5/165Y10T428/2985
    • A process is disclosed for performing encapsulation, en masse, by an in situ polymerization reaction to yield capsule wall material. The reaction comprises the polymerization of urea and formaldehyde, monomeric or low molecular weight polymers of dimethylol urea or methylated dimethylol urea, melamine and formaldehyde, monomeric or low molecular weight polymers of methylol melamine or methylated methylol melamine, in an aqueous vehicle and the reaction is conducted in the presence of mixtures of poly-electrolyte material, esp. poly(acrylic acid), and polystyrene sulfonic acid and/or salts thereof in certain critical proportions. The disclosed encapsulation process provides improved resistance of the emulsion of intended capsule core material to destabilization and permits the manufacture of micro-capsules with improved drop size distribution.
    • 公开了一种通过原位聚合反应进行包封以产生胶囊壁材料的方法。 该反应包括尿素和甲醛,羟丙基脲或甲基化二羟甲基脲,三聚氰胺和甲醛的单体或低分子量聚合物,羟甲基三聚氰胺或甲基化羟甲基三聚氰胺的单体或低分子量聚合物在水性载体中的聚合反应, 在多电解质材料的混合物存在下进行, 聚丙烯酸,聚苯乙烯磺酸和/或其盐。 所公开的封装方法提供了预期的胶囊核心材料的乳液对于不稳定性的改进的阻力,并允许制造具有改进的液滴尺寸分布的微胶囊。
    • 83. 发明授权
    • Capsule manufacture
    • 胶囊制造
    • US4100103A
    • 1978-07-11
    • US755830
    • 1976-12-30
    • Peter L. ForisRobert W. BrownPaul S. Phillips, Jr.
    • Peter L. ForisRobert W. BrownPaul S. Phillips, Jr.
    • B41M5/165B01J13/02B01J13/18C08G12/32
    • B01J13/18C08G12/32Y10S428/914Y10T428/2989
    • A process is disclosed for performing encapsulation, en masse, by an in situ polymerization reaction to yield capsule wall material. The polymerization comprises a reaction between melamine and formaldehyde and/or polycondensation of monomeric methylol melamine or etherified methylol melamine, or a low molecular weight polymer thereof, in an aqueous vehicle and the reaction is conducted in the presence of negatively-charged, carboxyl-substituted, linear aliphatic hydrocarbon polyelectrolyte material dissolved in the vehicle. Liquid-liquid phase separation is accomplished and maintained by increase in the molecular weight of the resulting condensation polymer without further dilution of the manufacturing vehicle. The negatively-charged polyelectrolyte material is required and has an apparent effect of controlling or modifying the polymerization reaction. The disclosed encapsulation process permits manufacture of micro-capsules in concentrations of capsule to capsule manufacturing vehicle higher than previously possible.
    • 公开了一种通过原位聚合反应进行包封以产生胶囊壁材料的方法。 聚合反应包括三聚氰胺和甲醛之间的反应和/或单体羟甲基三聚氰胺或醚化的羟甲基三聚氰胺或其低分子量聚合物在水性载体中的缩聚,并且反应在带负电荷的羧基取代的存在下进行 溶解在载体中的直链脂族烃聚电解质材料。 通过增加所得缩合聚合物的分子量而不进一步稀释制造车辆来实现和维持液 - 液相分离。 需要带负电荷的聚电解质材料,并具有控制或改性聚合反应的明显效果。 所公开的封装方法允许制造胶囊至胶囊制造车辆的浓度比以前更高的微胶囊。
    • 84. 发明授权
    • Capsule manufacture
    • 胶囊制造
    • US4087376A
    • 1978-05-02
    • US755832
    • 1976-12-30
    • Peter L. ForisRobert W. BrownPaul S. Phillips, Jr.
    • Peter L. ForisRobert W. BrownPaul S. Phillips, Jr.
    • B41M5/165A01N25/28B01J13/02B01J13/18C05G5/00C11B9/00
    • B01J13/18Y10S428/914Y10T428/2987Y10T428/2989
    • A process is disclosed for performing encapsulation, en masse, by an in situ polymerization reaction to yield capsule wall material. The polymerization includes a reaction between urea and formaldehyde or polycondensation of monomeric or low molecular weight polymers of dimethylol urea or methylated dimethylol urea in an aqueous vehicle and the reaction is conducted in the presence of negatively-charged, carboxyl-substituted, linear aliphatic hydrocarbon polyelectrolyte material dissolved in the vehicle. Liquid-liquid phase separation is accomplished and maintained by increase in the molecular weight of the resulting condensation polymer without further dilution of the manufacturing vehicle. The negatively-charged polyelectrolyte material is required and has an apparent effect of controlling or modifying the polymerization reaction. The disclosed encapsulation process permits manufacture of microcapsules in concentrations of capsule to capsule manufacturing vehicle higher than previously possible.
    • 公开了一种通过原位聚合反应进行包封以产生胶囊壁材料的方法。 聚合包括尿素和甲醛之间的反应或水性载体中二羟甲基脲或甲基化二羟甲基脲的单体或低分子量聚合物的缩聚,并且反应在带负电的羧基取代的直链脂族烃聚电解质的存在下进行 溶解在车辆中的材料。 通过增加所得缩合聚合物的分子量而不进一步稀释制造车辆来实现和维持液 - 液相分离。 需要带负电荷的聚电解质材料,并具有控制或改性聚合反应的明显效果。 所公开的封装方法允许以胶囊制造车辆的浓度制造高于先前可能的胶囊的微胶囊。