A method for the preparation of microcapsules
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专利名称：A method for the preparation of
microcapsules
发明人：Moriwaki, Masafumi,Etoh, Kei,Sekihara, Hiroyuki
申请号：EP88302898.7
申请日：19880331
公开号：EP0335021A1
公开日：
19891004
专利内容由知识产权出版社提供
摘要：Microcapsules are prepared by adding a methylolated melamine or methylolated urea to an aqueous emulsion of the core material dispersed in an aqueous solution of a styrene/maleic anhydride copolymer partially hydrolyzed in an alkaline condition and heating the mixture at 40 to 90 °C in an acidic condition so that a reaction product forming the capsule walls is produced by the esterification reaction between the carboxyl groups in the partial hydrolysis product and the methylol groups in the methylolated melamine or urea and the amidation reation between the carboxylic anhydride groups in the former and the amino groups in the latter. By virtue of the three dimensional network structure, the capsule walls are very dense and highly resistant against heat, water and solvents.
申请人：TOPPAN MOORE COMPANY, LTD.
地址：6, Kandasurugadai 1-chome Chiyoda-ku, Tokyo 101 JP
国籍：JP
代理机构：Allard, Susan Joyce
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