Wax encapsulated bleach particles and method for making same

Details Wax encapsulated bleach particles and method for making same Wax encapsulated bleach particles and method for making same

C - Chemistry, Metallurgy

11

D

117/45.1, 134/5.

C11D 3/395 (2006.01) B01J 13/04 (2006.01) C11D 1/66 (2006.01) C11D 3/08 (2006.01) C11D 3/39 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2029658

ABSTRACT Bleach particles encapsulated in a single coat of paraffin wax, the wax having melting point of 40 to 50°C and needle penetration value of 10 to 60 mm at 25°C. The coat comprises 35 to 55% by weight of the particle and may be from 100 to 1,000 microns thick. The coat prolongs the time in which chlorine bleach particles encapsulated therewith may remain active in aqueous environments. The encapsulated particle is made by spraying molten wax on to the particles in a fluidized bed. Liquid or powder cleaning compositions, particularly automatic dishwashing liquid detergents, may incorporate 0.1-15% of the single coat wax-encapsulated bleach particles.

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