Bleach activators in granular form
First Claim
1. A composition comprising free-flowing granules containing from about 70 to about 95% by weight of a bleach activator, based on the weight of said granules, and a substantially water-free binder for said bleach activator, said binder consisting of a mixture of anionic and nonionic surfactants which are solid at storage conditions wherein said anionic surfactant is present in the amount of from about 60 to about 95%/wt., based on the weight of said mixture of anionic and nonionic surfactants, said granules having been prepared by premixing said mixture of surfactants and said bleach activator, homogenizing the resulting mixture to form a paste which is extrudable in strand form, extruding said paste under elevated pressure at a temperature of up to 90°
- C., cutting the extrudate into granules, and rounding said granules under conditions which prevent said granules from sticking together.
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Accused Products
Abstract
A process for preparing free-flowing granules containing a bleach activator and a substantially water-free binder for the bleach activator. The process consists essentially of premixing a mixture of anionic and nonionic surfactants and the bleach activator, homogenizing the resulting mixture to form a paste which is extrudable in strand form, extruding the paste under elevated pressure, and cutting the extrudate into granules.
21 Citations
20 Claims
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1. A composition comprising free-flowing granules containing from about 70 to about 95% by weight of a bleach activator, based on the weight of said granules, and a substantially water-free binder for said bleach activator, said binder consisting of a mixture of anionic and nonionic surfactants which are solid at storage conditions wherein said anionic surfactant is present in the amount of from about 60 to about 95%/wt., based on the weight of said mixture of anionic and nonionic surfactants, said granules having been prepared by premixing said mixture of surfactants and said bleach activator, homogenizing the resulting mixture to form a paste which is extrudable in strand form, extruding said paste under elevated pressure at a temperature of up to 90°
- C., cutting the extrudate into granules, and rounding said granules under conditions which prevent said granules from sticking together.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. The process of preparing free-flowing granules containing from about 70 to about 95% by weight of a bleach activator, based on the weight of said granules, and a substantially water-free binder for said bleach activator, said binder consisting of a mixture of anionic and nonionic surfactants which are solid at storage conditions wherein said anionic surfactant is present in the amount of from about 60 to about 95% by weight, based on the weight of said mixture of anionic and nonionic surfactants, said process consisting essentially of premixing said mixture of said anionic and nonionic surfactants and said bleach activator, homogenizing the resulting mixture to form a paste which is extrudable in strand form, extruding said paste under elevated pressure at a temperature of up to 90°
- C., cutting the extrudate into granules, and rounding said granules under conditions which prevent said granules from sticking together.
- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification