2, 2-bis(4-methoxyphenyl)-1, 1, 1-trichloroethane insecticidal dust and process for making same

Claim 1

THE METHOD FOR PREPARING AN INSECTICIDAL DUST COMPOSITION CONTAINING 2,2-BIS(4-METHOXYPHENYL)-1,1,1-TRICHLOROETHANE AS AN ESSENTIAL ACTIVE INGREDIENT WHICH COMPRISES GRADUALLY INTRODUCING THE 2,2-BIS(4-METHOXYPHENYL)-1,1,1TRICHOLOROETHANE IN A FUSED STATE AT A TEMPERATURE ABOVE 90*C. BUT BELOW ABOUT 115*C. INTO A MASS OF ADSORBENT POWDER WHILE AGITATING THE POWDER TO EFFECT A MIXTURE OF THE FUSED MATERIAL AND THE ADSORBENT POWDER, THE RATE OF ADDITION OF THE FUSED 2,2-BIS(4-METHOXYPHENYL)-1,1,1TRICHLOROETHANE NTO THE ADSORBENT POWDER BEING CONTROLLED SO THAT THE MIXTURE REMAINS AS AN APPARENTLY DRY PULVERULENT SOLID THRUOUT THE ADDITION AND MIXING OPERATION, AND CONTINUING THE AGITATION FOLLOWING COMPLETION OF THE ADDITION OF THE FUSED 2,2-BIS(4-METHOXYPHENYL)1,1,1-TRICHLOROETHANE WHILE COOLING THE MIXTURE TO A TEMPERATURE NOT IN EXCESS OF ABOUT 50*C., WHEREBY THERE IS OBTAINED A FREE-FLOWING DUST PRODUCT CHARACTERIZED BY HAVING THE 2,2-BIS-(4METHOXYPHENYL)-1,1,1-TRICHLOROETHANE ADSORBED IN THE PORES AND ON THE SURFACES OF TH ADSORBENT POWDER.

Claim 2

THE METHOD FOR PREPARING AN INSECTICIDAL DUST COMPOSITION CONTAINING 2,2-BIS(4-METHOXYPHENYL)-1,1,1-TRICHLOROETHANE AS AN ESSENTIAL ACTIVE INGREDIENT WHICH COMPRISES GRADUALLY INTRODUCING THE 2,2-BIS(4-METHOXYPHENYL)-1,1,1TRICHOLOROETHANE IN A FUSED STATE AT A TEMPERATURE ABOVE 90*C. BUT BELOW ABOUT 115*C. INTO A MASS OF ADSORBENT POWDER WHILE AGITATING THE POWDER TO EFFECT A MIXTURE OF THE FUSED MATERIAL AND THE ADSORBENT POWDER, THE RATE OF ADDITION OF THE FUSED 2,2-BIS(4-METHOXYPHENYL)-1,1,1TRICHLOROETHANE NTO THE ADSORBENT POWDER BEING CONTROLLED SO THAT THE MIXTURE REMAINS AS AN APPARENTLY DRY PULVERULENT SOLID THRUOUT THE ADDITION AND MIXING OPERATION, AND CONTINUING THE AGITATION FOLLOWING COMPLETION OF THE ADDITION OF THE FUSED 2,2-BIS(4-METHOXYPHENYL)1,1,1-TRICHLOROETHANE WHILE COOLING THE MIXTURE TO A TEMPERATURE NOT IN EXCESS OF ABOUT 50*C., WHEREBY THERE IS OBTAINED A FREE-FLOWING DUST PRODUCT CHARACTERIZED BY HAVING THE 2,2-BIS-(4METHOXYPHENYL)-1,1,1-TRICHLOROETHANE ADSORBED IN THE PORES AND ON THE SURFACES OF TH ADSORBENT POWDER.