US3979318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized sodium percarbonate composition
Assignee: Kao Corp
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Filing: 1974-12-13
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Granted: 1976-09-07
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Expires: 1994-12-13
Abstract
Abstract Sodium percarbonate is stabilized by mixing therein sodium perborate and a hydrophobic liquid organic compound.
Inventors
- 👤 Fumikatsu Tokiwa
- 👤 Takehiko Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:38
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/10; C01B15/106; C11; C11D; C11D17/00; C11D17/0039; C11D3/00; C11D3/39; C11D3/3942
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
A stabilized sodium percarbonate composition consisting essentially of particles of sodium percarbonate uniformly coated with a film of a hydrophobic liquid organic compound in an amount of from about 5 to about 10 weight percent, based on the weight of said sodium percarbonate particles, said hydrophobic liquid organic compound having a melting point below about 15°C, a boiling point above about 100°C, and being non-reactive to and being a non-solvent for sodium percarbonate and sodium perborate, said hydrophobic liquid organic compound forming a moisture-resistant coating film on said sodium percarbonate particles, said composition also containing from about 5 to about 20 weight percent of a fine powder of sodium perborate, based on the weight of said sodium percarbonate particles, said sodium perborate particles being of smaller size than said sodium percarbonate particles and being mixed in or adhered to said film.
Claim 2
Dependent Claim
141 words
A stabilized sodium percarbonate composition consisting essentially of particles of sodium percarbonate uniformly coated with a film of a hydrophobic liquid organic compound in an amount of from about 5 to about 10 weight percent, based on the weight of said sodium percarbonate particles, said hydrophobic liquid organic compound having a melting point below about 15°C, a boiling point above about 100°C, and being non-reactive to and being a non-solvent for sodium percarbonate and sodium perborate, said hydrophobic liquid organic compound forming a moisture-resistant coating film on said sodium percarbonate particles, said composition also containing from about 5 to about 20 weight percent of a fine powder of sodium perborate, based on the weight of said sodium percarbonate particles, said sodium perborate particles being of smaller size than said sodium percarbonate particles and being mixed in or adhered to said film.
Claim 3
Dependent Claim
18 words
A composition as claimed in claim 1 in which said hydrophobic liquid compound is chlorinated paraffin or trichlorobenzene.
Claim 4
Dependent Claim
35 words
A composition as claimed in claim 1 in which said hydrophobic liquid compound is a saturated fatty alcohol having 5 to 10 carbon atoms or an unsaturated fatty alcohol having 5 to 18 carbon atoms.
Claim 5
Dependent Claim
27 words
A composition as claimed in claim 1 in which said hydrophobic liquid compound is selected from the group consisting of isoamyl alcohol, n-octylalcohol, oleyl alcohol and hexanol.
Claim 6
Dependent Claim
27 words
A composition as claimed in claim 1 in which said hydrophobic liquid compound is selected from the group consisting of dioctyl phthalate, dibenzyl sebacate and methyl oleate.
Claim 7
Dependent Claim
34 words
A composition as claimed in claim 1 in which said hydrophobic liquid compound is selected from the group consisting of castor oil, linseed oil, rape oil, peanut oil, soybean oil and rice bran oil.
Claim 8
Dependent Claim
29 words
A composition as claimed in claim 1 in which said hydrophobic liquid compound is selected from the group consisting of oleic acid, linoleic acid, undecanoic acid and caprylic acid.
Claim 9
Dependent Claim
37 words
A composition as claimed in claim 1 in which said hydrophobic liquid compound is selected from the group consisting of polyoxypropylene(4-8)sorbitol, polyoxypropylene(1-4)ethylenediamine, polyoxypropylene(1-10)C 8 -C 22 alkyl ethers and polyoxypropylene (1-10)C 8 -C 22 fatty acid esters.
Claim 10
Dependent Claim
34 words
A composition as claimed in claim 1 in which said hydrophobic liquid compound is selected from the group consisting of polyoxyethylene(1-3)C 8 -C 22 alkyl ethers and polyoxyethylene(1-3)C 6 -C 22 alkyl phenyl ethers.
Claim 11
Dependent Claim
43 words
A composition as claimed in claim 1, in which the particles of sodium perborate have a size of less than about 100 Tyler standard sieve size and the particles of sodium percarbonate have a size of more than 100 Tyler standard sieve size.
Claim 12
Dependent Claim
21 words
A composition as claimed in claim 10 in which the particles of sodium percarbonate are from 12 to 40 mesh size.
References Cited (Backward Citations)
US3607759A
Cited
US3847830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |