Process for the preparation of microcapsules

Details Process for the preparation of microcapsules Process for the preparation of microcapsules

1995-08-08

1999-02-02

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Biocides; animal or insect repellents or attractants

424417, 424409, 424489, 424484, 264 41, 264 47, A01N 2534

Patent

active

058661530

ABSTRACT:
The invention relates to a process for the preparation of an aqueous suspension of microcapsules having a capsule wall of polyurea and encapsulating a water-immiscible pesticide, by dispersing a solution of a polyisocyanate in the sparingly water-soluble pesticide in water and subsequently reacting the dispersion with a polyamine, which process comprises effecting the dispersion of the solution of the polyisocyanate in the sparingly water-soluble pesticide in water and the subsequent reaction of the dispersion with the polyamine in the presence of at least one water-soluble or water-dispersible nonionic surfactant of a block copolymer having at least one hydrophobic block and at least one hydrophilic block.

REFERENCES:
patent: 3948636 (1976-04-01), Marks
patent: 4244836 (1981-01-01), Frensch et al.
patent: 4643764 (1987-02-01), Scher
patent: 4936901 (1990-06-01), Surgant et al.
patent: 4938797 (1990-07-01), Hasslin et al.
patent: 5229122 (1993-07-01), Chadwick et al.
patent: 5354742 (1994-10-01), Deming et al.
patent: 5500219 (1996-03-01), Utz et al.

Affiliated with

Also associated with

Rating

Process for the preparation of microcapsules does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of microcapsules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of microcapsules will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1114772