초록 ▼

Copolymers of vinyl pyrrolidone and a quaternary ammonium monomer complexed with H2O2 in the form of free-flowing powders is described. The products are made in a fluidized bed of said copolymer maintained at a reaction temperature of from room temperature to about 60°C. The fluidized bed is contact

Copolymers of vinyl pyrrolidone and a quaternary ammonium monomer complexed with H2O2 in the form of free-flowing powders is described. The products are made in a fluidized bed of said copolymer maintained at a reaction temperature of from room temperature to about 60°C. The fluidized bed is contacted with finely divided droplets of a 30 to 85% by weight aqueous H2O2 solution at a feed rate of about 1-10 g/minute/kg copolymer present. The copolymer-H2O2 product preferably contains about 10-20% H2O2 (1:1 molar ratio), and less than about 5% water. The product can be used as a hair bleach enhancer which provides dual hair conditioning properties.

대표청구항 ▼

A process for the production of free-flowing powders of a copolymer of vinyl pyrrolidone and a quaternary ammonium monomer complexed with H2O2 comprising reacting a fluidized bed of said copolymer maintained at a reaction temperature of from ambient temperature of about 60°C. with finely divided dro

A process for the production of free-flowing powders of a copolymer of vinyl pyrrolidone and a quaternary ammonium monomer complexed with H2O2 comprising reacting a fluidized bed of said copolymer maintained at a reaction temperature of from ambient temperature of about 60°C. with finely divided droplets of a 30 to 85% by weight aqueous solution of H2O2which is introduced at a rate of about 2-5 g of solution/min/kg copolymer, and drying the product.