US5115010A
Expired / Lapsed
US
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Fire-retardant polyamide composition having good heat resistance
Assignee: Mitsui Chemicals Inc
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Filing: 1991-04-15
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Granted: 1992-05-19
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Expires: 2011-04-15
Abstract
Abstract A composition comprising (I) a thermally stable polyamide such as an aromatic polyamide, (II) a halogenated polystyrene or a halogenated polyphenylene oxide, and (III) sodium antimonate has excellent fire retardancy and excellent thermal stability during molding. The thermal stability of the composition is further enhanced by including (IV) a hydrotalcite-type complex hydroxide or (V) magnesium oxide and/or zinc oxide.
Inventors
- 👤 Hideki Sakai
- 👤 Kazuo Ishiwatari
- 👤 Fumitoshi Ikejiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:52
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/06; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L71/00; C08L71/08; C08L71/10; C08L71/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A fire-retardant polyamide composition having good heat resistance, consisting essentially of: 100 parts by weight of a polyamide having excellent heat resistance which is a polycondensation product between a dibasic acid component composed of 60 to 100 mole % of terephthalic acid and 0 to 40 mole % of an aromatic dicarboxylic acid other than terephthalic acid and an alkylenediamine component having 4 to 25 carbon atoms, and has an intrinsic viscosity (η), measured in concentrated sulfuric acid at 30° C., of at least 0.5 dl/g; 10 to 100 parts by weight of a halogenated polystyrene composed of recurring units of the formula ##STR3## wherein R is H or CH 3 , X is Br or Cl, and m is a number of 1 to 5, or a halogenated phenylene oxide composed of recurring units of the formula ##STR4##
Claim 2
Dependent Claim
139 words
A fire-retardant polyamide composition having good heat resistance, consisting essentially of: 100 parts by weight of a polyamide having excellent heat resistance which is a polycondensation product between a dibasic acid component composed of 60 to 100 mole % of terephthalic acid and 0 to 40 mole % of an aromatic dicarboxylic acid other than terephthalic acid and an alkylenediamine component having 4 to 25 carbon atoms, and has an intrinsic viscosity (η), measured in concentrated sulfuric acid at 30° C., of at least 0.5 dl/g; 10 to 100 parts by weight of a halogenated polystyrene composed of recurring units of the formula ##STR3## wherein R is H or CH 3 , X is Br or Cl, and m is a number of 1 to 5, or a halogenated phenylene oxide composed of recurring units of the formula ##STR4##
Claim 3
Dependent Claim
59 words
wherein X is Br or Cl and p is a number of 1 to 4; 0. 5 to 50 parts by weight of sodium antimonate having a composition of the formula Na 2 Sb 2 O 6 ; 0.05 to 50 parts by weight of magnesium oxide; and 5 to 250 parts by weight of a fibrous reinforcing agent.
Claim 4
Dependent Claim
59 words
wherein X is Br or Cl and p is a number of 1 to 4; 0. 5 to 50 parts by weight of sodium antimonate having a composition of the formula Na 2 Sb 2 O 6 ; 0.05 to 50 parts by weight of magnesium oxide; and 5 to 250 parts by weight of a fibrous reinforcing agent.
Claim 5
Dependent Claim
37 words
The composition of claim 1 wherein the proportion of the halogenated polystyrene or the halogenated polyphenylene oxide is 15 to 75 parts by weight, and the proportion of sodium antimonate is 1 to 15 parts by weight.
Claim 6
Dependent Claim
24 words
The composition of claim 1 which further comprises 0.1 to 5 parts by weight of (IV) a hydrotalcite-type complex hydroxide or its calcination product.
Claim 7
Dependent Claim
17 words
The composition of claim 1 which further comprises 0.05 to 50 parts by weight of zinc oxide.
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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) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |