US4456719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retarding thermoplastic polyester
Assignee: Toray Industries Inc
•
Filing: 1983-04-04
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Granted: 1984-06-26
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Expires: 2003-04-04
Abstract
Abstract A flame retarding thermoplastic polyester composition superior in thermal stability, fluidity and mechanical properties, and prepared by mixing (a) halogen containing polystyrene and/or halogen containing poly-α-methylstyrene, (b) antimony trioxide and (c) epoxy compound with respect to thermoplastic polyester is disclosed.
Inventors
- 👤 Yoshiyuki Yamamoto
- 👤 Toshihide Inoue
- 👤 Masana Yanagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:16
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/2279; C08K5/00; C08K5/04; C08K5/10; C08K5/15; C08K5/151; C08K5/1515; C08L; C08L25/00; C08L25/02; C08L25/04; C08L63/00; C08L67/00; C08L67/02; C08L25/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A flame retarding polyester composition which comprises (a) 3 to 45 parts by weight of a halogen containing polystyrene and/or a halogen containing poly-a-methystyrene represented by formula (I) given below, (b) 1 to 20 parts by weight of antimony trioxide, and (c) 0.1 to 10 parts by weight of epoxy compound which are mixed with 100 parts by weight of a thermoplastic polyester selected from the group consisting of polyethylene terephthalate and polybutylene terephthalate, ##STR3## wherein R represents a hydrogen atom or methyl group, X represents a bromine or chlorine atom, p is an integer of 1 to 5, and n is an integer larger than 2.
Claim 2
Dependent Claim
107 words
A flame retarding polyester composition which comprises (a) 3 to 45 parts by weight of a halogen containing polystyrene and/or a halogen containing poly-a-methystyrene represented by formula (I) given below, (b) 1 to 20 parts by weight of antimony trioxide, and (c) 0.1 to 10 parts by weight of epoxy compound which are mixed with 100 parts by weight of a thermoplastic polyester selected from the group consisting of polyethylene terephthalate and polybutylene terephthalate, ##STR3## wherein R represents a hydrogen atom or methyl group, X represents a bromine or chlorine atom, p is an integer of 1 to 5, and n is an integer larger than 2.
Claim 3
Dependent Claim
18 words
A flame retarding polyester composition as claimed in claim 1, wherein said halogen containing polystyrene is a polytribromostyrene.
Claim 4
Dependent Claim
35 words
A flame retarding polyester composition as claimed in claim 1 or 2, wherein the total amount of halogen containing polystyrene and/or halogen containing poly-α-methylstyrene is in the range of 5 to 40 parts by weight.
Claim 5
Dependent Claim
24 words
A flame retarding polyester composition as claimed in claim 1, wherein the epoxy compound is glycidyl esters of aliphatic acids or cycloaliphatic carboxylic acids.
Claim 6
Dependent Claim
20 words
A flame retarding polyester composition as claimed in claim 1, wherein the epoxy compound is bisglycidyl ether of bisphenol A.
Claim 7
Dependent Claim
18 words
A flame retarding polyester composition as claimed in claim 1, wherein said epoxy compound is ethylene/glycidyl methacrylate copolymer.
Claim 8
Dependent Claim
34 words
A flame retarding polyester composition as claimed in claim 1, 4, 5 or 6, wherein the amount of addition of the epoxy compound is in the range of 0.2 to 9 parts by weight.
Claim 9
Dependent Claim
16 words
A flame retarding polyester composition as claimed in claim 1, further containing fibrous and/or granular reinforcement.
Claim 10
Dependent Claim
16 words
A flame retarding polyester composition as claimed in claim 8, wherein said reinforcement is glass fibers.
References Cited (Backward Citations)
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US4107231A
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US4151223A
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Cited
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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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |