Pesticidal dispersion and method for preparing the same

Claim 1

A CONCENTRATED, SUBSTANTIALLY HOMOGENEOUS, THIXOTROPIC AQEUOUS DISPERSION OF SUBSTANITALLY NON-FLOCCULATED, FINELY DIVIDED PARTICLES OF A PEST CONTROL AGENT SELECTED FROM THE GROUP CONSISTING OF WATER-INSOLUBLE FUNGICIDES, HERBICIDES AND METHOXYCHLOR, SAID DISPERSION HAVING THE CHARACTERISTICS OF BEING SUBSTANTIALLY FREE OF SETTLING OF THE PARTICLES TO A HARD, DIFFICULTLY RESUUSPENDABLE CAKE UPON STANDING AND BEING EXTENDIBLE WITH WATER TO FORM A DILUTE MIXTURE WHEREIN THE PARTICLES SETTLE ONLY AFTER PORLONGED STANDING AND WHEN SETTLED ARE READILY REDISPERSIBLE WITH MILD AGITATION, THE DISPERSION COMPRISING THE PEST CONTROL AGENT, WATER, A SUSPENDING AGENT WHICH IS A WATER-SWELLABLE, HYDROUS, COLLOIDAL MINERAL SILICATE OF THE GROUP CONSISTING OF HYDRATED ATTAPULGITE AND MONTMORILLONITE GROUP CLAYS, AND A DISPERSING AGENT OF THE GROUP CONSISTING OF LIGNIN SULFONIC ACID, SODIUM LIGNIN SULFONATE, SODIUM SALTS OF POLYMERIZED ALKYLARYL AND ARYALKYL SULFONIC ACIDS, POLYVINYL ALCOHOL, METHYL CELLULOSE, METHYLHYDROXYETHYL CELLULOSE, CARBOXYMETHYL CELLULOSE, AND POLYOXYETHYLENE COMPOUNDS WHICH ARE REACTION PRODUCTS OF ETHYLENE OXIDE WITH SORBITOL-FATTY ACID ESTERS AND WITH MIXTURES OF RESIN AND FATTY ACIDS, IN THE PROPORTIONS, BY WEIGHT, OF ABOUT FROM 20% TO 65% OF PEST CONTROL AGENT, 0.5% TO 10% OF SUSPENDING AGENT AND 0.5% TO 25% OF DISPERSING AGENT, THE TOTAL OF SAID INGREDIENTS NOT EXCEEDING 70%, AND AT LEAST 30% OF WATER, THE SUSPENDING AGENT BEING SWELLED AND DEAGGLOMERATED, AND AT LEAST 90% BY WEIGHT OF THE PEST CONTROL AGENT HAVING A PARTICLE SIZE LESS THAN 10 MICRONS.