Patent JPS54231A successfully refreshed from Google Patents.
Patent US4247332A successfully refreshed from Google Patents.
US4247332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retarder having anti-blooming property
Assignee: Otsuka Chemical Co Ltd
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Filing: 1979-03-09
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Granted: 1981-01-27
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Expires: 1999-03-09
Abstract
Abstract An anti-blooming flame retarder consisting essentially of a water-soluble flame retardant agent and a water-soluble polymer, which is particularly suited for use in treating improved woods such as fiber-boards and plywoods. The improved woods are treated with the anti-blooming flame retarder and heat-treated.
Inventors
- 👤 Tsukuru Kinoshita
- 👤 Shuji Masuda
- 👤 Tetuo Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:42
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A flame retarder aqueous solution consisting of a water-soluble flame retardant agent and 0.01% to 1% by weight of a water-soluble polymer based on the weight of said water-soluble flame retardant agent, said water-soluble polymer being changeable by heat treatment to have a water resistance sufficient to prevent the migration of said water-soluble flame retardant agent and being at least one member selected from the group consisting of polyacrylic acid, polyacrylamide, polyacrylic hydrazide, alkali metal salts of polyacrylic acid and polyvinyl alcohol, and said water-soluble flame retardant agent being at least one member selected from the group consisting of ammonium dihydrogenphosphate, diammonium hydrogenphosphate, condensed ammonium polyphosphate, ammonium bromide and alum.
Claim 2
Dependent Claim
110 words
A flame retarder aqueous solution consisting of a water-soluble flame retardant agent and 0.01% to 1% by weight of a water-soluble polymer based on the weight of said water-soluble flame retardant agent, said water-soluble polymer being changeable by heat treatment to have a water resistance sufficient to prevent the migration of said water-soluble flame retardant agent and being at least one member selected from the group consisting of polyacrylic acid, polyacrylamide, polyacrylic hydrazide, alkali metal salts of polyacrylic acid and polyvinyl alcohol, and said water-soluble flame retardant agent being at least one member selected from the group consisting of ammonium dihydrogenphosphate, diammonium hydrogenphosphate, condensed ammonium polyphosphate, ammonium bromide and alum.
Claim 3
Independent Claim
126 words
A method of imparting flame retardancy to improved woods which comprises impregnating a woody material with an aqueous solution consisting of a water-soluble flame retardant agent and 0.01% to 1% by weight of a water-soluble polymer based on the weight of said water-soluble flame retardant agent, drying the impregnated woody material and heat-treating the dried woody material at a temperature of 100° to 160° C. for 15 to 60 minutes, said water-soluble polymer being at least one member selected from the group consisting of polyacrylic acid, polyacrylamide, polyacrylic hydrazide, alkali metal salts of polyacrylic acid and polyvinyl alcohol, and said water-soluble flame retardant agent being at least one member selected from the group consisting of ammonium dihydrogenphospate, diammonium hydrogenphosphate, condensed ammonium polyphosphate, ammonium bromide and alum.
Claim 4
Independent Claim
126 words
A method of imparting flame retardancy to improved woods which comprises impregnating a woody material with an aqueous solution consisting of a water-soluble flame retardant agent and 0.01% to 1% by weight of a water-soluble polymer based on the weight of said water-soluble flame retardant agent, drying the impregnated woody material and heat-treating the dried woody material at a temperature of 100° to 160° C. for 15 to 60 minutes, said water-soluble polymer being at least one member selected from the group consisting of polyacrylic acid, polyacrylamide, polyacrylic hydrazide, alkali metal salts of polyacrylic acid and polyvinyl alcohol, and said water-soluble flame retardant agent being at least one member selected from the group consisting of ammonium dihydrogenphospate, diammonium hydrogenphosphate, condensed ammonium polyphosphate, ammonium bromide and alum.
Claim 5
Dependent Claim
12 words
The method of claim 2, wherein said woody material is pulp board.
Claim 6
Dependent Claim
22 words
The method of claim 2, wherein said woody material is a veneer which is formed into a board after the heat treatment.
Claim 7
Dependent Claim
28 words
The method of claim 2, wherein said woody material is a wood fiber or wood chip which is formed into a board before the drying and heat treatment.
Claim 8
Dependent Claim
13 words
A method as in claim 2, wherein said woody material is laminated wood.
References Cited (Backward Citations)
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US2849316A
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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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |