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:
Nov. 26, 1991
Filed:
Mar. 30, 1990
Yoshikatsu Ogawa, Takatsuki, JP;
Haruhiko Hisada, Yao, JP;
Takeshi Kasahara, Sakai, JP;
Fumihiko Kizaki, Osaka, JP;
Masahide Yoshiya, Fujiidera, JP;
Marubishi Yuka Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A process for the preparation of a dibromopropyl ether compound having a high melting point, which comprises mixing a bis-dibromopropyl ether of tetrabromobisphenol-sulfone or tetrabromobisphenolpropane represented by the following general formula: ##STR1## in the melted state with a crystallized product of said compound at a temperature lower than the melting point of the crystallized product, and holding the mixture at a temperature of 50.degree. to 100.degree. C. According to this process, the dibromopropyl ether compound of a high melting point can be prepared without using an organic solvent.