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:
Jul. 03, 1990
Filed:
Jun. 07, 1988
Applicant:
Inventors:
Hans W Hasslin, Grenzach-Wyhlen, DE;
Michael J Hopkinson, Pleasant Garden, NC (US);
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A01N / ; A61K / ;
U.S. Cl.
CPC ...
71118 ; 514 86 ; 514 93 ; 514122 ; 514134 ; 514147 ; 514144 ; 514148 ; 514256 ; 514365 ; 514383 ; 514469 ; 514473 ; 514352 ; 514513 ; 514726 ; 514433 ; 514625 ; 514755 ; 514431 ; 514637 ; 514646 ; 71 88 ; 71 92 ; 71 93 ; 71 94 ; 71 98 ; 71114 ; 71100 ; 71120 ; 71121 ; 71124 ; 71126 ; 71DI / ;
Abstract
The invention relates to a process for the preparation of microcapsules having a capsule wall of polyurea and encapsulating a water-immiscible pesticide. The process comprises first dispersing a solution of a polyisocyanate in the sparingly water-soluble pesticide, in the presence of an anionic dispersant and at least one nonionic protective colloid and/or a nonionic surfactant, and subsequently reacting the dispersion with a polyamine, to give a stable aqueous suspension of microcapsules which can be used either direct or after dilution with water as pesticidal composition.