Aqueous Polymer Dispersion

Abstract

An aqueous polymer dispersion prepared by free-radical polymerization of vinyl acetate in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1 and wherein the ratio by weight of vinyl acetate monomer to protective colloid is between 19:1 and 4:1.

1 .- 37 . (canceled)  
   
   
       38 . A pharmaceutical dosage form comprising an active ingredient and, as an auxiliary, an aqueous dispersion of polyvinyl acetate prepared by free-radical polymerization of vinyl acetate monomer in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator, and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1, and the ratio by weight of the vinyl acetate monomer to protective colloid is between 19:1 and 4:1.  
   
   
       39 . A solid pharmaceutical, agrochemical or nutritional dosage form comprising, as a coating agent, an aqueous dispersion of polyvinyl acetate prepared by free-radical polymerization of vinyl acetate monomer in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator, and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1, and the ratio by weight of the vinyl acetate monomer to protective colloid is between 19:1 and 4:1.  
   
   
       40 . A detergent, dishwashing and cleaning composition of any type comprising, as an auxiliary, an aqueous dispersion of polyvinyl acetate prepared by free-radical polymerization of vinyl acetate monomer in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator, and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1, and the ratio by weight of the vinyl acetate monomer to protective colloid is between 19:1 and 4:1, or a powder prepared therefrom.  
   
   
       41 . The composition as claimed in  claim 40 , wherein the detergent, dishwashing or cleaning composition is in the form of granules.  
   
   
       42 . A fragrance or flavoring comprising, as coating or embedding agent, an aqueous dispersion of polyvinyl acetate prepared by free-radical polymerization of vinyl acetate monomer in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator, and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1, and the ratio by weight of the vinyl acetate monomer to protective colloid is between 19:1 and 4:1, or a powder prepared therefrom as coating or embedding agents.  
   
   
       43 . A process for coating a surface comprising spraying a preparation comprising an aqueous dispersion of polyvinyl acetate prepared by free-radical polymerization of vinyl acetate monomer in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator, and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1, and the ratio by weight of the vinyl acetate monomer to protective colloid is between 19:1 and 4:1, or a powder prepared therefrom onto the surface.  
   
   
       44 . The process as claimed in  claim 43 , wherein the surface comprises human or animal skin.  
   
   
       45 . The process as claimed in  claim 43 , wherein the preparation is a wound dressing spray.  
   
   
       46 . A transdermal therapeutic system comprising an aqueous dispersion of polyvinyl acetate prepared by free-radical polymerization of vinyl acetate monomer in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator, and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1, and the ratio by weight of the vinyl acetate monomer to protective colloid is between 19:1 and 4:1, or a powder prepared therefrom.  
   
   
       47 . A cosmetic preparation comprising an aqueous dispersion of polyvinyl acetate prepared by free-radical polymerization of vinyl acetate monomer in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator, and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1, and the ratio by weight of the vinyl acetate monomer to protective colloid is between 19:1 and 4:1, or a powder prepared therefrom.  
   
   
       48 . A process for protecting skin from sunburn, said process comprising applying to the skin a preparation comprising an aqueous dispersion of polyvinyl acetate prepared by free-radical polymerization of vinyl acetate monomer in the presence of at least one ionic emulsifier, at least one free-radical initiator and at least one protective colloid, wherein the polymerization is carried out in the presence of a polymerization regulator, and wherein the ratio by weight of protective colloid to ionic emulsifier is at least 4:1, and the ratio by weight of the vinyl acetate monomer to protective colloid is between 19:1 and 4:1.