Claims
- 1. A method for preparing a granulated perborate salt, comprising:
- A. forming a mixture of said perborate salt with a polymeric fluorocarbon, said mixture containing said polymeric fluorocarbon in an amount by weight of said perborate salt, of from about 0.01% to about 0.70%;
- B. compacting said mixture into a plurality of preforms; and
- C. comminuting said preforms under agitation, to form said granulated perborate salt.
- 2. The method of claim 1 wherein said perborate salt is selected from the group consisting of sodium perborate monohydrate, anhydrous sodium perborate and mixtures thereof.
- 3. The method of claim 2 wherein said perborate salt comprises anhydrous sodium perborate.
- 4. The method of claim 1 wherein said polymeric fluorocarbon includes at least one fluoroolefin.
- 5. The method of claim 4 wherein said polymeric fluorocarbon comprises polytetrafluoroethylene.
- 6. The method of claims 1, 4 or 5 wherein said polymeric fluorocarbon is present in an amount from about 0.33% to about 0.66% by weight.
- 7. The method of claim 1 wherein said mixture is compacted by passing through a roller compactor, and said preforms comprise flakes.
- 8. The method of claim 1 wherein said mixture is compacted by slugging.
- 9. The method of claim 1 wherein said preforms are comminuted by passage through an oscillating granulator, to a particle size passing through a 30 mesh screen.
- 10. A granulated perborate salt product, suitable for inclusion in a compactible composition, said product comprising a precompressed mixture of said perborate salt and from about 0.1% to about 0.70% of a polymeric fluorocarbon.
- 11. The product of claim 10 wherein said perborate salt is selected from the group consisting of sodium perborate monohydrate, anhydrous sodium perborate, and mixtures thereof.
- 12. The product of claim 10 wherein said perborate salt comprises anhydrous sodium perborate.
- 13. The product of claim 10 wherein said polymeric fluorocarbon includes at least one fluoroolefin.
- 14. The product of claim 10 wherein said polymeric fluorocarbon comprises polytetrafluoroethylene.
- 15. The product of claims 10-13 or 14 wherein said polymeric fluorocarbon is present in an amount of from about 0.33% to about 0.66% by weight.
- 16. The product of claim 10 having a hardness on the order of 30 kg/in.sup.2.
- 17. The product of claim 10 having a hardness ranging from about 15 kg/in.sup.2 to about 30 kg/in.sup.2.
- 18. The product of claim 10 having a particle size capable of passing through a 30 mesh screen.
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application is a continuation-in-part of my copending application Ser. No. 297,892, filed Aug. 31, 1981, now U.S. Pat. No. 4,362,639, which is in turn a continuation-in-part of my copending application Ser. No. 251,030, filed Apr. 3, 1981.
US Referenced Citations (7)
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
297892 |
Aug 1981 |
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Parent |
251030 |
Apr 1981 |
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