US4405486A
Expired / Lapsed
US
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Method for preparing granulated perborate salts containing a polymeric fluorocarbon
Assignee: Warner Lambert Co LLC
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Filing: 1982-05-20
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Granted: 1983-09-20
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Expires: 2002-05-20
Abstract
Abstract A method is disclosed for the preparation of granulated perborate salts having improved utility in compressible compositions such as those formed into denture cleanser tablets. The method broadly comprises forming a mixture of one or more perborate salts such as sodium perborate monohydrate and anhydrous sodium perborate, with a polymeric fluorocarbon such as polytetrafluoroethylene, with the polytetrafluoroethylene present in an amount ranging from about 0.01% to about 0.70% by weight of the perborate salt. The particles thus prepared exhibit combination of improved hardness and specific weight that facilitates their participation in the compressible cleanser composition, together with enhanced disintegration characteristics that are favorably imparted to the cleanser tablets. The present invention also includes the granular salts prepared by the method, which have a broad range of utility in detergents, cleansers and the like.
Inventors
- 👤 Anthony B. J. Eoga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:18
CPC Classifications
A; A61; A61Q; A61Q11/00; A61Q11/02; A61K; A61K8/00; A61K8/02; A61K8/0216; A61K8/022; A61K8/0225; A61K8/18; A61K8/19; A61K8/22; A61K8/72; A61K8/81; A61K8/8123; C; C11; C11D; C11D17/00; C11D17/0047; C11D17/0065; C11D17/0073; C11D3/00; C11D3/0005; C11D3/0052; C11D3/16; C11D3/37; C11D3/3746; C11D3/3749; C11D3/39; C11D3/3942; C11D3/48
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
65 words
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.
Claim 2
Independent Claim
65 words
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.
Claim 3
Dependent Claim
25 words
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.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said perborate salt comprises anhydrous sodium perborate.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said polymeric fluorocarbon includes at least one fluoroolefin.
Claim 6
Dependent Claim
11 words
The method of claim 4 wherein said polymeric fluorocarbon comprises polytetrafluoroethylene.
Claim 7
Independent Claim
25 words
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.
Claim 8
Dependent Claim
21 words
The method of claim 1 wherein said mixture is compacted by passing through a roller compactor, and said preforms comprise flakes.
Claim 9
Dependent Claim
12 words
The method of claim 1 wherein said mixture is compacted by slugging.
Claim 10
Dependent Claim
26 words
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.
Claim 11
Dependent Claim
33 words
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.
Claim 12
Dependent Claim
33 words
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.
Claim 13
Dependent Claim
25 words
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.
Claim 14
Dependent Claim
13 words
The product of claim 10 wherein said perborate salt comprises anhydrous sodium perborate.
Claim 15
Dependent Claim
14 words
The product of claim 10 wherein said polymeric fluorocarbon includes at least one fluoroolefin.
Claim 16
Dependent Claim
11 words
The product of claim 10 wherein said polymeric fluorocarbon comprises polytetrafluoroethylene.
Claim 17
Dependent Claim
25 words
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.
Claim 18
Dependent Claim
16 words
The product of claim 10 having a hardness on the order of 30 kg/in 2 .
Claim 19
Dependent Claim
20 words
The product of claim 10 having a hardness ranging from about 15 kg/in 2 to about 30 kg/in 2 .
Claim 20
Dependent Claim
17 words
The product of claim 10 having a particle size capable of passing through a 30 mesh screen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |