US4636544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retarded polyester molding composition with improved electrical performance
Assignee: General Electric Co
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Filing: 1985-02-25
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Granted: 1987-01-13
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Expires: 2005-02-25
Abstract
Abstract Titanium dioxide is disclosed to improve the comparative tracking index of flame retarded poly(1,4-butylene terephthalate) resin molding compositions.
Inventors
- 👤 Leonard R. Hepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:11
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/2279
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A flame retarded poly(1,4-butylene terephthalate) resin molding composition having an improved comparative tracking index consisting essentially of: (a) poly(1,4-butylene terephthalate) resin; (b) a flame retarding amount of halogenated aromatic flame retardant; (c) an effective amount of antimony compound synergist; and (d) an effective amount of titanium dioxide powder to raise the comparative tracking index of said molding composition, said effective amount being from about 3.5 to about 6.5 parts by weight of said titanium dioxide powder for each 85 parts by weight of said poly (1,4-butylene terephthalate) resin and said halogenated aromatic flame retardant.
Claim 2
Dependent Claim
94 words
A flame retarded poly(1,4-butylene terephthalate) resin molding composition having an improved comparative tracking index consisting essentially of: (a) poly(1,4-butylene terephthalate) resin; (b) a flame retarding amount of halogenated aromatic flame retardant; (c) an effective amount of antimony compound synergist; and (d) an effective amount of titanium dioxide powder to raise the comparative tracking index of said molding composition, said effective amount being from about 3.5 to about 6.5 parts by weight of said titanium dioxide powder for each 85 parts by weight of said poly (1,4-butylene terephthalate) resin and said halogenated aromatic flame retardant.
Claim 3
Dependent Claim
17 words
The molding composition of claim 1 wherein said halogenated aromatic flame retardant is an aromatic carbonate homopolymer.
Claim 4
Dependent Claim
15 words
The molding composition of claim 1 which additionally contains a reinforcing amount of glass fiber.
Claim 5
Dependent Claim
16 words
The molding composition of claim 1 which additionally contains an impact modifying amount of impact modifier.
Claim 6
Dependent Claim
25 words
The molding composition of claim 1 which additionally contains up to 80 weight parts of another thermoplastic resin per 20 weight parts poly(1,4-butylene terephthalate) resin.
Claim 7
Dependent Claim
71 words
A flame retarded poly(1,4-butylene terephthalate) resin molding composition having an improved comparative tracking index consisting essentially of: (a) poly(1,4-butylene terephthalate) resin; (b) a flame retarding amount of halogenated aromatic flame retardant; (c) an effective amount of antimony compound synergist; (d) from about 3.5 to about 6.5 parts by weight titanium dioxide for each 85 parts by weight resin and halogenated aromatic flame retardant; and (e) a reinforcing amount of glass fiber.
Claim 8
Dependent Claim
71 words
A flame retarded poly(1,4-butylene terephthalate) resin molding composition having an improved comparative tracking index consisting essentially of: (a) poly(1,4-butylene terephthalate) resin; (b) a flame retarding amount of halogenated aromatic flame retardant; (c) an effective amount of antimony compound synergist; (d) from about 3.5 to about 6.5 parts by weight titanium dioxide for each 85 parts by weight resin and halogenated aromatic flame retardant; and (e) a reinforcing amount of glass fiber.
Claim 9
Dependent Claim
97 words
A flame retarded poly(1,4-butylene terephthalate) resin molding composition having an improved comparative tracking index consisting essentially of: (a) poly(1,4-butylene terephthalate) resin; (b) a flame retarding amount of halogenated aromatic flame retardant; (c) an effective amount of antimony compound synergist; and (d) an amount of titanium dioxide powder effective to raise the comparative tracking index of said molding composition to at least 575 volts, said effective amount of titanium dioxide powder being from about 3.5 to about 6.5 parts by weight for each 85 parts by weight of said poly(1,4-butylene terephthalate) resin and said halogenated aromatic flame retardant.
Claim 10
Dependent Claim
97 words
A flame retarded poly(1,4-butylene terephthalate) resin molding composition having an improved comparative tracking index consisting essentially of: (a) poly(1,4-butylene terephthalate) resin; (b) a flame retarding amount of halogenated aromatic flame retardant; (c) an effective amount of antimony compound synergist; and (d) an amount of titanium dioxide powder effective to raise the comparative tracking index of said molding composition to at least 575 volts, said effective amount of titanium dioxide powder being from about 3.5 to about 6.5 parts by weight for each 85 parts by weight of said poly(1,4-butylene terephthalate) resin and said halogenated aromatic flame retardant.
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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) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |