发明名称 |
FREMGANGSMAATE FOR INNKAPSLING AV VANN-UBLANDBART MATERIALE INNEN EN SKALLVEGG AV POLYUREA |
摘要 |
This invention relates to a process for encapsulation, and particularly to the production of small or minute capsules constituted by a skin or thin wall of polyurea, which involves bringing together an aqueous phase containing a lignin sulfonate emulsifier and a water-immiscible phase containing a water-immiscible material, the material to be encapsulated, plus polymethylene polyphenylisocyanate, dispersing the water-immiscible phase in the aqueous phase followed by addition of a polyfunctional amine. Polymethylene polyphenylisocyanate reacts with the amine to form a solid polyurea shell wall about the encapsulated material. The capsules formed may be directly used as aqueous suspensions. |
申请公布号 |
NO150424(B) |
申请公布日期 |
1984.07.09 |
申请号 |
NO19800000856 |
申请日期 |
1980.03.25 |
申请人 |
MONSANTO COMP, |
发明人 |
BEESTMAN, GEORGE B.,;DEMING, JOHN M., |
分类号 |
A01N25/28;B01J13/02;B01J13/16;(IPC1-7):01J13/02;01N25/28 |
主分类号 |
A01N25/28 |
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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