US4530880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granular organohalide flame retardant additive
Assignee: Sekisui Kaseihin Kogyo KK
•
Filing: 1984-01-27
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Granted: 1985-07-23
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Expires: 2004-01-27
Abstract
Abstract A granular flame retardant additive is provided comprising from 70 to 99.5% by weight of an organohalide flame retardant and from 0.5 to 30% by weight of thermoplastic synthetic resin as a binder. The additive is easy to handle and resistant to disintegration during transportation and mixing with fabricating resin pellets. Uniform distribution thereof in fabricated thermoplastic articles is achieved by simply co-feeding the granules and the fabricating resin to a fabricating machine.
Inventors
- 👤 Akira Taniuchi
- 👤 Setsuo Nishibori
- 👤 Hirohito Komori
- 👤 Motoshige Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:39
CPC Classifications
C; C08; C08L; C08L101/00; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A granular flame retardant additive composition for use in fabricating thermoplastic articles comprising from 70 to 99.5% by weight of the composition of a mixture of at least 50% by weight of an organohalide flame retardant having a melting point above 150° C. and the balance of an organohalide flame retardant having a melting point below 150° C., and from 0.5 to 30% by weight of the composition of a thermoplastic synthetic resin as a binder material of said organohalide flame retardant.
Claim 2
Dependent Claim
82 words
A granular flame retardant additive composition for use in fabricating thermoplastic articles comprising from 70 to 99.5% by weight of the composition of a mixture of at least 50% by weight of an organohalide flame retardant having a melting point above 150° C. and the balance of an organohalide flame retardant having a melting point below 150° C., and from 0.5 to 30% by weight of the composition of a thermoplastic synthetic resin as a binder material of said organohalide flame retardant.
Claim 3
Dependent Claim
18 words
The composition of claim 1, wherein said granules have an average particle size from 0.5 to 5.0 mm.
Claim 4
Dependent Claim
22 words
The composition of claim 1, wherein said thermoplastic synthetic resin is a polymer or copolymer derived from styrene, butadiene or methyl methacrylate.
Claim 5
Dependent Claim
14 words
The composition of claim 1, wherein said organohalide flame retardant contains chlorine and/or bromine.
Claim 6
Dependent Claim
18 words
The composition of claim 1 wherein said granules have an average particle size from 0.5 to 8.00 mm.
Claim 7
Dependent Claim
45 words
A method for fabricating flame retarded thermoplastic articles which comprises the steps of co-feeding the flame retardant additive composition of claim 1 and a thermoplastic resin to a fabricating machine, melting both components within the machine, and fabricating the molten mass into a desired shape.
Claim 8
Dependent Claim
36 words
The method according to claim 6, wherein the ratio of the flame retardant composition relative to said thermoplastic resin is from 0.1 to 30 parts by weight per 100 parts by weight of said thermoplastic resin.
Claim 9
Dependent Claim
38 words
The method according to claim 6, wherein said thermoplastic resin is polystyrene resin, poly(methyl methacrylate) resin, ABS resin, styrene-maleic anhydride resin, polyester resin, polyamide resin, polyethylene resin, polypropylene resin, EVA resin, polycarbonate resin, polyacetal resin or cellulose derivatives.
Claim 10
Dependent Claim
12 words
The method according to claim 6, wherein said fabricating is injection molding.
Claim 11
Dependent Claim
11 words
The method according to claim 6, wherein said fabricating is extruding.
References Cited (Backward Citations)
US3058926A
Cited
US3259593A
Cited
US3287309A
Cited
US3301813A
Cited
US3975327A
Cited
US4069288A
Cited
US4211687A
Cited
US4193911A
Cited
US4339556A
Cited
US4161472A
Cited
FR2419956A1
Cited
US4181644A
Cited
US4301058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |