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:
Jun. 02, 1987
Filed:
Jun. 21, 1984
Applicant:
Inventors:
Yoshio Okada, Iwaki, JP;
Yuriko Igarashi, Iwaki, JP;
Assignee:
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B32B / ;
U.S. Cl.
CPC ...
42840221 ; 264-47 ; 503215 ; 428914 ;
Abstract
A microcapsule enclosing a color-former solution for a pressure-sensitive recording paper is prepared by a process in which a water-soluble cationic urea resin and at least one of prepolymer selected from the group consisting of melamine-formaldehyde prepolymer, urea-formaldehyde prepolymer and melamine-urea-formaldehyde prepolymer are polycondensed on the surface of a dispersed solvent droplet containing a color-former in the presence of an anionic surfactant, while causing complex-coacervation between the water-soluble cationic urea resin and the anionic surfactant.