The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 1989
Filed:
Oct. 20, 1987
Kiyoshi Kasai, Kameyama, JP;
Masayuki Hattori, Aichi, JP;
Tatsuya Shimizu, Yokkaichi, JP;
Hiroshi Tadenuma, Yokkaichi, JP;
Japan Synthetic Rubber Co., Ltd., Tokyo, JP;
Abstract
Microencapsulated particles each consisting of a mother particle of a core substance and a coating layer of daughter particles formed on the surface of said mother particle, which are obtained by stirring mother particles of a core substance having a number average particle diameter of 1 to 200 .mu.m and either or both of daughter particles (1) of a coating layer-forming material having a number average particle diameter of 1/5 of less of that of the mother particles and fragile daughter particles (2) of a coating layer-forming material having a number average particle diameter of more than 1/5 of that of the mother particles but having a fragility index (Fr) as defined in the specification of 5 or more, at a high speed in an air stream. Said microencapsulated particles can be used in various application fields such as coatings, electronic components and electronograph. In the electronograph filed, in particular, the microencapsulated particles can effectively be used as a toner capable of providing an image of high resolution and good quality.