US4666965A
Expired / Lapsed
US
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Flame-retardant polyethylene terephthalate resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1985-12-30
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Granted: 1987-05-19
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Expires: 2005-12-30
Abstract
Abstract Disclosed is a flame-retardant glass-fiber-reinforced polyethylene terephthalate resin composition formed by blending (A) a polyethylene terephthalate resin, (B) glass fibers, (C) a nucleating agent, (D) a monoepoxy compound having a specific chemical structure and/or a benzoic acid ester having a specific chemical structure, (E) a bromine-containing polymeric flame retarder having aromatic rings in the polymeric side chains, and (E) an antimony oxide in specified proportions. This resin composition has a very high degree of crystallizability and can yield molded articles having excellent appearance, mechanical strength, heat distortion resistance and flame retardancy.
Inventors
- 👤 Yoshihisa Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; C08K13/00; C08K13/04; C08K5/10; C08K5/101
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
140 words
A flame-retardant polyethylene terephthalate resin composition comprising (A) 30 to 85% by weight of a polyethylene terephthalate resin, (B) 5 to 60% by weight of glass fibers, (C) 0.03 to 20% by weight of a nucleating agent, (D) 0.1 to 10% by weight of at least one compound selected from the group consisting of compounds of the general formulae ##STR27## wherein R 3 is a hydrocarbon radical having 2 to 7 carbon atoms, R 4 is a hydrocarbon radical having 1 to 7 carbon atoms and n and m are whole numbers of 1 or greater, (E) 2 to 20% by weight of a bromine-containing polymeric flame retarder having brominated aromatic rings in the polymeric side chains, and (F) 0.5 to 10% by weight of an antimony oxide, the combined amount of components (A) to (F) being 100% by weight.
Claim 2
Dependent Claim
140 words
A flame-retardant polyethylene terephthalate resin composition comprising (A) 30 to 85% by weight of a polyethylene terephthalate resin, (B) 5 to 60% by weight of glass fibers, (C) 0.03 to 20% by weight of a nucleating agent, (D) 0.1 to 10% by weight of at least one compound selected from the group consisting of compounds of the general formulae ##STR27## wherein R 3 is a hydrocarbon radical having 2 to 7 carbon atoms, R 4 is a hydrocarbon radical having 1 to 7 carbon atoms and n and m are whole numbers of 1 or greater, (E) 2 to 20% by weight of a bromine-containing polymeric flame retarder having brominated aromatic rings in the polymeric side chains, and (F) 0.5 to 10% by weight of an antimony oxide, the combined amount of components (A) to (F) being 100% by weight.
Claim 3
Dependent Claim
31 words
The composition of claim 1 wherein the polyethylene terephthalate resin (A) has an intrinsic viscosity of 0.4 to 1.4 as measured in a 50/50 (by weight) mixture of phenol and tetrachloroethylene.
Claim 4
Dependent Claim
60 words
The composition of claim 1 wherein the nucleating agent (C) comprises one or more compounds selected from the group consisting of group Ia or IIa metal salts of organic carboxylic acids, monovalent or divalent metal salts of ionic copolymers composed of an α-olefin and an α,β-unsaturated carboxylic acid salt, as well as oxides, sulfates and silicates of group II metals.
Claim 5
Dependent Claim
44 words
The composition of claim 1 wherein the bromine-containing polymeric flame retarder (E) comprises one or more polymers selected from the group consisting of polymers of (meth)acrylic esters formed by the esterification of a brominated phenol derivative with (meth)acrylic acid, and polymers of brominated styrenes.
Claim 6
Dependent Claim
16 words
The composition of claim 1 wherein the antimony oxide (F) comprises antimony trioxide or antimony pentoxide.
Claim 7
Dependent Claim
32 words
The composition of claim 1, wherein said polyethylene terephthalate resin component (A) is a copolymer obtained by copolymerizing ethylene terephthalate units with at least one dicarboxylic acid, glycol or hydroxy acid comonomer.
Claim 8
Dependent Claim
47 words
The composition of claim 6, wherein said dicarboxylic acid is phthalic acid, isophthalic acid, adipic acid, sebacic acid, naphthalene-1,4-or 2,6-dicarboxylic acid or diphenylether-4,4'-dicarboxylic acid; said glycol is propylene glycol, butylene glycol, neopentyl glycol, cyclohexanedimethanol or 2,2-bis(4-hydroxyphenyl) propane; and said hydroxy acid is p-hydroxybenzoic acid or p-hydroxyethoxybenzoic acid.
Claim 9
Dependent Claim
15 words
The composition of claim 1, wherein said glass fibers have lengths ranging from 0.4-6 mm.
Claim 10
Dependent Claim
32 words
The composition of claim 1, wherein said bromine-containing polymeric flame retardant (E) is a brominated phenyl (meth)acrylate selected from the group consisting of polypentabromobenzyl acrylate, polypentabromobenzyl methacrylate, polytetrabromoxylylene bisacrylate and polytetrabromoxylylene bismethacrylate.
Claim 11
Dependent Claim
25 words
The composition of claim 1, wherein said bromine-containing polymeric flame retardant (E) is a brominated styrene selected from the group consisting of poly(2,4,6-tribromo)styrene and poly(2,4,5-tribromostyrene).
Claim 12
Dependent Claim
27 words
The composition of claim 1, wherein said bromine-containing polymeric flame retardant (E) has a bromine content of 50-75% by weight and a molecular weight greater than 1000.
Claim 13
Dependent Claim
129 words
A flame-retardant polyethylene terephthalate resin composition, comprising: (A) 30 to 85% by weight of a polyethylene terephthalate resin, (B) 5 to 60% by weight of glass fibers, (C) 0.03 to 20% by weight of a nucleating agent, (D) 0.1 to 10% by weight of the compound: ##STR28## wherein R 1 is a hydrocarbon radical of 6 to 30 carbon atoms, R 2 is a hydrocarbon radical of from 2 to 6 carbon atoms and l is 0 or an integer of from 1 to 30, (E) 2 to 20% by weight of a bromine-containing polymeric flame retarder having brominated aromatic rings in the polymeric side chains, and (F) 0.5 to 10% by weight of an antimony oxide, the combined amount of components (A) to (F) being 100% by weight.
Claim 14
Dependent Claim
129 words
A flame-retardant polyethylene terephthalate resin composition, comprising: (A) 30 to 85% by weight of a polyethylene terephthalate resin, (B) 5 to 60% by weight of glass fibers, (C) 0.03 to 20% by weight of a nucleating agent, (D) 0.1 to 10% by weight of the compound: ##STR28## wherein R 1 is a hydrocarbon radical of 6 to 30 carbon atoms, R 2 is a hydrocarbon radical of from 2 to 6 carbon atoms and l is 0 or an integer of from 1 to 30, (E) 2 to 20% by weight of a bromine-containing polymeric flame retarder having brominated aromatic rings in the polymeric side chains, and (F) 0.5 to 10% by weight of an antimony oxide, the combined amount of components (A) to (F) being 100% by weight.
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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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |