US3890406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyphenylene oxides containing phosphoric acid ester-antimony trioxide flame retarding additives
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1972-09-08
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Granted: 1975-06-17
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Expires: 1992-09-08
Abstract
Abstract A flame-retarded composition comprising 100 parts by weight a modified polyphenylene oxide, 0.5-10 parts by weight of a phosphoric acid ester having a boiling point of 200*C or higher and 0.2-5 parts by weight of antimony trioxide. The composition has much improved flame resistance and is suitable for the use of electrical parts, industrial parts and construction material owing to its excellent moldability and good mechanical and thermal properties.
Inventors
- 👤 Hiroomi Matsunaga
- 👤 Takuzo Okumura
- 👤 Isao Takata
- 👤 Teruo Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08F; C08F283/00; C08F283/06; C08F283/08; C08F8/00; C08F8/40; C08K13/00; C08K13/02; C08L; C08L51/00; C08L51/08; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A FLAME-RETARDED COMPOSITION OF A MODIFIED POLYPHENYLENE OXIDE COMPRISING 100 PARTS BY WEIGHT OF A MODIFIED POLYPHENYLENE OXIDE OBTAINED BY GRAFT POLYMERIZING IN A DISPERSED STATE A STYRENE MONOMER IN THE PRESENCE OF A POLYPHENYLENE OXIDE WITH A RUBBERY POLYMER, 0.5-10 PARTS BY WEIGHT OF AT LEAST ONE PHOSPHORIC ACID ESTER HAVING A BOILING POINT OF 200*C OR HIGHER, OF THE FORMULA,
Claim 2
Dependent Claim
62 words
A FLAME-RETARDED COMPOSITION OF A MODIFIED POLYPHENYLENE OXIDE COMPRISING 100 PARTS BY WEIGHT OF A MODIFIED POLYPHENYLENE OXIDE OBTAINED BY GRAFT POLYMERIZING IN A DISPERSED STATE A STYRENE MONOMER IN THE PRESENCE OF A POLYPHENYLENE OXIDE WITH A RUBBERY POLYMER, 0.5-10 PARTS BY WEIGHT OF AT LEAST ONE PHOSPHORIC ACID ESTER HAVING A BOILING POINT OF 200*C OR HIGHER, OF THE FORMULA,
Claim 3
Dependent Claim
58 words
A flame-retarded composition of a modified polyphenylene oxide according to claim 1, wherein the phosphoric acid ester is triethyl phosphate, tripropyl phosphate, tributyl phosphate, tripentyl phosphate, trihexyl phosphate, trioctyl phosphate, tridecyl phosphate, tridodecyl phosphate, trioctadecyl phosphate, triphenyl phosphate, tribenzyl phosphate, tricresyl phosphate, phenyl dibenzyl phosphate, diphenyl pentyl phosphate, cresyl diphenyl phosphate, octyl diphenyl phosphate or the mixture thereof.
Claim 4
Dependent Claim
25 words
A flame-retarded composition of a modified polyphenylene oxide according to claim 1, wherein the amount of the phosphoric acid ester is 1-5 parts by weight.
Claim 5
Dependent Claim
23 words
A flame-retarded composition of a modified polyphenylene oxide according to claim 1, wherein the amount of antimony oxide is 0.3-3 parts by weight.
Claim 6
Dependent Claim
28 words
A flame-retarded composition of a modified polyphenylene oxide according to claim 1, wherein the ratio of the amounts of antimony trioxide to the phosphoric acid ester is 5-100:100.
Claim 7
Dependent Claim
17 words
A flame-retarded composition of a modified polyphenylene oxide according to claim 1, wherein the ratio is 7-90:100.
Claim 8
Dependent Claim
20 words
A flame-retarded composition of a modified polyphenylene oxide according to claim 2, wherein the phosphoric acid ester is triphenyl phosphate.
Claim 9
Dependent Claim
47 words
A flame-retarded composition of a modified polyphenylene oxide according to claim 1, wherein the polyphenylene oxide is poly-2, 6-dimethyl-1, 4-phenylene oxide, poly-2,6-diethyl-1, 4-phenylene oxide, poly-2,6-dipropyl-1,4-phenylene oxIde, poly-2, 6-dimethoxy-1,4-phenylene oxide, poly-2, 6-dichloromethyl-1, 4-phenylene oxide, poly-2,6-dibromomethyl-1,4-phenylene oxide, poly-2,6-diphenyl-1,4-phenylene oxide, poly-2, 6-ditolyl-1, 1,4-phenylene oxide, poly-2,6-dichloro-1,4-phenylene oxide or poly-2, 5-dimethyl-1,4-phenylene oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |