Patent US4456719A successfully refreshed from Google Patents.
US4456719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retarding thermoplastic polyester
Assignee: Toray Industries Inc
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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 15:40
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)
US4102853A
Cited
DE2502835A1
Cited
US4107231A
Cited
US4151223A
Cited
US4271274A
Cited
JPS54158453A
Cited
JPS5569630A
Cited
JPS5592759A
Cited
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 |