Process for preparing an antimicrobial particulate composition

Abstract

The present invention relates to a process for preparing an antimicrobial particulate composition. The invention also relates to personal care or hygiene composition comprising an antimicrobial particulate composition obtainable by the process in accordance with this invention. The invention more particularly relates to a process for preparing an antimicrobial metal nanoparticles immobilized in an inorganic porous material and also incorporating these particles in personal care or hygiene compositions. The antimicrobial particulate composition comprises 0.05% to 3% by weight of antimicrobial metal particles and 97 to 99.95% by weight of immobilizer comprising an inorganic porous material selected from zinc oxide, magnesium hydroxide or calcium carbonate.

1 . A personal care or hygiene composition comprising:
 i. 5% to 85% by weight of a surfactant and   ii. 0.1 to 5% by weight of an antimicrobial particulate composition comprising:
 (a) 0.05% to 3% by weight of antimicrobial metal particles and 
 (b) 97 to 99.95% by weight of an immobilizer comprising an inorganic porous material selected from zinc oxide, magnesium hydroxide or calcium carbonate. 
   
     
     
         2 . The personal care or hygiene composition as claimed in  claim 1  wherein the antimicrobial metal particles are silver or copper nanoparticles. 
     
     
         3 . The personal care or hygiene composition as claimed in  claim 2  wherein the antimicrobial metal particles are silver nanoparticles. 
     
     
         4 . The personal care or hygiene composition as claimed in  claim 1  wherein the inorganic porous material is selected from porous zinc oxide or calcium carbonate. 
     
     
         5 . The personal care or hygiene composition as claimed in  claim 2  wherein the inorganic porous material is selected from porous zinc oxide or calcium carbonate. 
     
     
         6 . The personal care or hygiene composition as claimed in  claim 3  wherein the inorganic porous material is selected from porous zinc oxide or calcium carbonate. 
     
     
         7 . The personal care or hygiene composition as claimed in  claim 1  wherein the surfactant is an anionic surfactant. 
     
     
         8 . The personal care or hygiene composition as claimed in  claim 7  wherein the anionic surfactant is a soap surfactant. 
     
     
         9 . The personal care or hygiene composition as claimed in  claim 2  wherein the surfactant is an anionic surfactant. 
     
     
         10 . The personal care or hygiene composition as claimed in  claim 5  wherein the surfactant is an anionic surfactant. 
     
     
         11 . The personal care or hygiene composition as claimed in  claim 6  wherein the surfactant is an anionic surfactant. 
     
     
         12 . The personal care or hygiene composition as claimed in  claim 11  wherein the anionic surfactant is a soap surfactant.