发明名称 |
FREMGANGSMAATE TIL FREMSTILLING AV MEGET SMAA POLYMERKAPSLER |
摘要 |
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. |
申请公布号 |
NO774457(A) |
申请公布日期 |
1978.07.03 |
申请号 |
NO19770004457 |
申请日期 |
1977.12.23 |
申请人 |
NCR CORPORATION, |
发明人 |
FORIS, PETER LASZLO,;BROWN, ROBERT WILLIAM,;PHILLIPS, PAUL SPARGUR JR., |
分类号 |
B41M5/165;B01J13/02;B01J13/18;C08G12/32;(IPC1-7):01J/ |
主分类号 |
B41M5/165 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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