TH32098A - Components contained in microcapsules - Google Patents

Abstract

DC60 (11/08/40) Polyurea in sub-capsule well-suited. Especially for use with leaves It was prepared by an interactive polymerization process. Where polyurea Will be made of aromatic Diisocyanate and or aromatic polyisocyanate containing Three or more isocyanate groups with weight ratio (with both isocyanates) of polyisocyanates. Diisocyanate from approximately 1: 100 to approximately 1: 1.5 and where subcapsules are formed to average particle sizes from approximately 1 to approximately 5 microns compared to traditional liquids (i.e. Emulsion), the capsule sub-capsule component can provide safer transport. And contain more active substances And at the same time providing the same bioavailability as the liquid components Polyurea in sub-capsules that work well. Especially for use with leaves It was prepared by an interactive polymerization process. Where polyurea is made from aromatic diisocyanate and or aromatic polyisocyanate having three or more isocyanate groups at There is a weight ratio (with both isocyanates) of polyisocyanates: diisocyanates from approximately 1: 100 to approximately 1: 1.5, and where the capsules are It is made to average particle size from approximately 1 to approximately 5 microns compared to traditional liquids (ie, emulsifying) components of the sub-capsule grassicides can be conveyed. Safer And contain more active substances And at the same time providing the same bioavailability as the liquid components:

Claims (3)

1. Process for preparing microcapsules with a relatively rapid release of polyurea containing agricultural active materials. Containing the phases of (a) preparing the organic phase Containing Water soluble material To contain capsules, aromatic diisocyanate and aromatic polyisocyanate With three or more isocyanate groups, where when organic phases consist of aromatic diisocyanates and aromatic polyisocyanates The weight-by-weight ratio of the polyisocyanate to diivocyanate is approximately 1.50 to approximately 1:10, (b) the introduction of the organic phase into the aqueous phase. Containing water, protective colloid and surfactant to form the distribution of the organic phase in the aqueous phase; (c) Mixing the dispersed under high shear loads To form an oil-in-water emulsion Where the oil droplets average from about 1 to about 5 microns; And (d) the necessary adjustments where the temperature and / or pH of the oil-in-water emulsion In such a way that the polymerization takes place. In the way that the reaction Polymerization takes place to form a micro-capsule containing an organic phase. 2. The process stated in claim 1, where the organic phase is not loaded with aromatic polyisos. Cyanate 3 or more isocyanate groups 3. Process as specified in claim 1, where the organic phase consists of aromatic diisocyanate and aromatic polyi Socyanate With 3 or more isocyanate groups; 4. Process as specified in the claim clause. 1 where the oil droplets average from approximately 2 to approximately 4.5 microns. 5. Process according to claim 1, where the aromatic Diisocyanate is tollene diisocyanate. 6. Process as set out in claim 3, where aromatics Diisocyanate is tulene diisocyanate 7. The process specified in claim 1, where aromatic Polyisocyanate is polymethylene polyphenyl isocyanate 8. Process as described in claim 1, where the capsule container contains pyrethic insecticide. ROUND 9. The process described in claim 1 where the capsule container contains lambta-cihalothrin 1 0. Process as specified in claim 1 where the capsule container Contains flucifop-P-Butyl 1 1. Built microcapsules Following the process set out in Clause 1 1. 2. Built microcapsules Following the process outlined in Clause 3 1. 3. Crafted micro-capsules Following the process outlined in Clause 7.