Copper hydroxide dry flowable bactericide/fungicide and method of making and using same
1997
Lefiles, J.H. | Taylor, E.J. | Crawford, M.A.
There is disclosed a granular copper hydroxide dry flowable bactericide/fungicide having improved biological activity and a method for making and using same. A bactericide/fungicide is made by forming a homogenous aqueous slurry containing between approximately 5 percent and 20 percent by weight (based on the total weight of all dry ingredients) of a first dispersant selected from the group consisting of partially neutralized polyacrylic acid having a pH of between approximately 5 and 10 and an average molecular weight of between approximately 1,000 percent and 10,000 percent and lignin sulfonate between approximately 0 percent and 5 percent by weight (based on the total weight of all dry ingredients) of a second dispersant for bentonite clay, between approximately 40 and 80 percent by weight (based on the total weight of all dry ingredients) phosphate stabilized cupric hydroxide and between approximately 6 percent and 30 percent by weight (based on the total weight of all dry ingredients) bentonite clay; and spray drying the slurry to thereby form a dry free flowing granular bactericide/fungicide product. The slurry can also include antifoam and wetting agents. Other partially neutralized polycarboxylic acid polymers useful as the first dispersant are also disclosed
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