EP0733082A1 - Flame resistance polyamide resin composition - Google Patents
Flame resistance polyamide resin compositionInfo
- Publication number
- EP0733082A1 EP0733082A1 EP94903393A EP94903393A EP0733082A1 EP 0733082 A1 EP0733082 A1 EP 0733082A1 EP 94903393 A EP94903393 A EP 94903393A EP 94903393 A EP94903393 A EP 94903393A EP 0733082 A1 EP0733082 A1 EP 0733082A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- parts
- weight
- mixture
- flame retardant
- diamine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
Definitions
- the present invention relates to a highly heat resistant and flame resistant polyamide resin composition.
- Polyamide resins which have excellent mechanical properties, moldability, and chemical resistance, are used in a variety of fields, such as in automotive parts, electrical and electronic parts, mechanical parts, and the like. In particular, electrical and electronic parts require resistance to soldering and flame resistance.
- High melting resins such as aromatic polyamides, 4,6-nylon, polyphenylene sulfide, or the like, have been developed for applications in soldering-resistant molded goods.
- 4,6-nylon fails to provide a molded article with good dimensional stability due to the fact that it absorbs much water.
- Polyphenylene sulfide mainly has moldability problems in that it generates extensive flash with molded products and requires a high molding temperature.
- Aromatic polyamides are superior in moldability to the other resins.
- Resins are rendered flame resistant by an extensively-used procedure which involves incorporating a considerable amount of a flame retardant.
- a combination of a halide and an antimony compound is excellent in terms of flame resistance and raw material cost.
- Many compositions use such a flame retardant system. Similar compositions are known for high melting resins, but these compositions lack sufficient stability, failing to provide a flame resistant resin composition which is satisfactory with respect to the appearance of the molded articles and safety during molding or pellet production.
- the present invention aims to provide a high melting flame resistant polyamide resin composition having excellent heat resistance, mold safety, and good appearance of the molded articles.
- the present invention comprises incorporating a specific flame retardant and a flame retardant coagent into a high melting aromatic polyamide copolymer obtained by copolymerizing terephthalic acid, or a mixture of terephthalic acid and isophthalic acid, with a mixture of hexamethylene diamine and 2- ethylpentamethylene diamine.
- This polyamide copolymer which is excellent in heat resistance and mechanical strength, has a melting point in the range of 280-330°C. Such a melting point range allows one to set the resin temperature during production so as not to cause the flame retardant to decompose or degrade, thereby permitting one to obtain a composition which is excellent in moldability and work safety.
- the present invention is a flame retardant polyamide resin composition
- a flame retardant polyamide resin composition comprising (A) 100 parts by weight of a polyamide copolymer, having a melting point of 280-330°C, which is comprised of (1) an aromatic dicarboxylic acid component, which is terephthalic acid or a mixture of terephthalic acid and isophthalic acid, with the content of isophthalic acid being not more than 40 mole % of said mixture, and (2) an aliphatic diamine component, which is a mixture of hexamethylene diamine and 2- methylpentamethylene diamine, with hexamethylene diamine being at least 40 mole % of the mixture;
- the polyamide copolymers of this invention have melting points of 280-330°C, preferably 285-305°C.
- Component (B) is a flame retardant.
- the flame retardant used in this invention is polytribromostyrene or polybromophenylene ether, which may be used alone or in combination. Said flame retardant is used in an amount of 10-100 parts by weight, preferably 20-50 parts by weight, based upon 100 parts by weight of (A). The amount of incorporation of the above flame retardant is selected at 10-100 parts by weight because a level less than 10 parts by weight may cause a problem with heat resistance, while adding more than 100 parts by weight may cause problems with respect to mechanical strength.
- Component (C) is a flame retardant coagent.
- the flame retardant coagent used in this invention is antimony oxide or sodium antimonate, which may be used alone or in combination.
- the amount of the flame retardant coagent is 0.5-40 parts by weight, preferably 5-20 parts by weight, based upon 100 parts by weight of (A).
- the flame retardant coagent is added in an amount of 0.5-40 parts by weight because a level less than 0.5 parts by weight may fail to provide a flame retardation effect, while a level greater than 20 parts by weight may cause a problem in mechanical strength.
- Antimony oxides include, for example, antimony trioxide, antimony tetroxide, antimony pentoxide, or the like.
- the flame retardant coagent in this invention is preferably antimony pentoxide or sodium antimonate.
- the polyamide resin of this invention may also contain up to 200 parts by weight, based upon 100 parts by weight of (A), of an inorganic reinforcing agent, depending upon the application for the molded article.
- Inorganic reinforcing agents include glass fibers, carbon fibers, potassium titanate, whiskers, talc, mica, and the like.
- the flame resistant polyamide resin composition of this invention may also contain, in addition to the above components, additives such as heat stabilizers, plasticizers, antioxidants, nucleating agents, dyes, pigments, mold release agents, and the like, to the extent they do not significantly adversely affect the properties thereof.
- additives such as heat stabilizers, plasticizers, antioxidants, nucleating agents, dyes, pigments, mold release agents, and the like, to the extent they do not significantly adversely affect the properties thereof.
- T represents terephthalic acid
- I represents isophthalic acid
- p-PH is p-phenylene
- m-Ph is m-phenylene
- 6 in 6T and 6l is hexamethylene diamine
- 2MP is 2-methylpentamethylene diamine.
- a polyamide copolymer with a ratio of 6T:2MPT of 50:50 and a polyamide copolymer of 6T, 6l, and 2MPT at a ratio of 45:5:50, brominated aromatic amide (Nanac Company EB905), brominated phenylene oxide (Ethyl Corporation, Saytex 120), and brominated i ide (Ethyl Corporation, Saytex BT93) were mixed at the weight ratios given in Tables 1 and 2, below, and were pelletized in a manner similar to the above example.
- the heat resistance of the resultant pellets was evaluated by measuring a thermogravimetric change in a stream of nitrogen in a DuPont Instrument Thermal Analysis (sic) 2,000 TGA2950.
- the pellets were heated at a heating rate of 10°C/min and the temperature at which a 5% weight loss occurred was defined as Tg.
- Samples were rated satisfactory if the Tg was equal to or higher than 345°C, which corresponds to the resin temperature at the time of extrusion.
- An example with a Tg less than 345°C was rated unsatisfactory. The results are shown in Table 1, below.
- the top end of a test piece was held by a clamp so as to set the test piece vertically: A defined flame was allowed to make contact with the bottom end of the test piece for 10 seconds and then the flame was kept away from the sample to measure the duration of combustion (from the first ignition of the test piece). When burning extinguished, the flame was immediately allowed to come into contact with the bottom end of the test piece for 10 seconds to measure the combustion time (second ignition) of the test piece. The same measurement was repeated for five test pieces, five times each for the first ignition combustion time and second ignition combustion time, to yield a total of 10 data points. The total of the 10 data points was designated S; the largest value among the 10 data points was called M.
- V-O equivalent A rating of V-O equivalent was given if S was not more than 50 seconds and M was not more than 10 seconds with no continued burning which reached the clamp and there was no drip of the flame melt, causing the ignition of cotton placed 12 inches below the sample.
- V-2 equivalent A rating of V-2 equivalent was given if S was not greater than 250 seconds and M was not greater than 30 seconds, where the flame melt dripped to cause the ignition of the cotton located 12 inches below the sample.
- the state of extrusion was rated poor based on the difficulty of pulling out resin strands, on any resin decomposition at high temperatures, on gas formation, and the like, and in regard to problems in pellet productivity and work safety. A rating of satisfactory was given if no problems occurred in these aspects.
- Moldability time was rated poor if there were any problems, such as resin decomposition, gas formation, flash formation, poor appearance of the molded article, and the like, as well as any problems in molded article productivity and work safety. Those without any problems were rated satisfactory.
- the results for state of extrusion, color, moldability time, average combustion, and UL-94 are shown in Table 3, below.
- FR-1 Brominated aromatic amide (Nanac Company, EB905)
- FR-2 Brominated epoxy resin (Dainippon Ink K.K., EP500)
- FR-3 Brominated epoxy resin (Dainippon Ink K.K., EP100)
- FR-4 Brominated epoxy resin (Dainippon Ink K.K., EC30)
- FR-5 Brominated phenylene oxide (Ethyl Corporation, Saytex 120)
- FR-6 Brominated imide (Ethyl Corporation, Saytex BT93)
- FR-7 Polybromophenylene ether (Great Lakes Company, PO-64)
- FR-8 Crosslinked brominated polystyrene (Nanac Company,
- FR-9 Polytribromostyrene (Nissan Fero Company's Pyrochek 68PB) Sy-1: Sodium antimonate (Nissan Kagaku K.K., Sunepoch NA1070L) Table 2: Combustion Test. State of Extrusion, and Moldability Examples
- FR-1 Brominated phenylene oxide (Ethyl Corporation, Saytex 120)
- FR-2 Polybromophenylene ether (Great Lakes Company, PO-64)
- FR-3 Crosslinked brominated polystyrene (Nanac Company, EBR370-FK)
- FR-4 Polytribromostyrene (Nissan Fero Company, Pyrochek 68PB) Sy-1: Antimony trioxide (Campine Company, White Star N)
- GR Microglass Chopped Strand (TP64, Nippon Sheet Glass Co., Ltd.)
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4206754A JPH06263986A (en) | 1992-08-03 | 1992-08-03 | Flame retardant aromatic polyamide resin composition |
PCT/US1993/011679 WO1995015357A1 (en) | 1992-08-03 | 1993-12-02 | Flame resistance polyamide resin composition |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0733082A1 true EP0733082A1 (en) | 1996-09-25 |
EP0733082A4 EP0733082A4 (en) | 1997-03-05 |
Family
ID=16528541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94903393A Withdrawn EP0733082A4 (en) | 1992-08-03 | 1993-12-02 | Flame resistance polyamide resin composition |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0733082A4 (en) |
JP (1) | JPH06263986A (en) |
WO (1) | WO1995015357A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69900341T2 (en) * | 1998-05-29 | 2002-04-25 | Ube Industries | Flame retardant aromatic polyamide resin compositions |
JP5284205B2 (en) * | 2009-07-08 | 2013-09-11 | 旭化成ケミカルズ株式会社 | Polyamide composition |
JP5284204B2 (en) * | 2009-07-08 | 2013-09-11 | 旭化成ケミカルズ株式会社 | Polyamide composition |
JP2018119045A (en) * | 2017-01-24 | 2018-08-02 | マナック株式会社 | Flame-retardant polyamide resin composition |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0172259A2 (en) * | 1983-04-13 | 1986-02-26 | Mitsubishi Gas Chemical Company, Inc. | Fire-retardant fiber-reinforced polyamide resin composition |
EP0270151A1 (en) * | 1986-11-04 | 1988-06-08 | Dsm N.V. | Polyamide composition |
JPS63139942A (en) * | 1986-12-02 | 1988-06-11 | Japan Synthetic Rubber Co Ltd | Nylon resin composition |
EP0410301A1 (en) * | 1989-07-27 | 1991-01-30 | BASF Aktiengesellschaft | Flame resistant thermoplastic mouldings |
EP0448221A1 (en) * | 1990-02-19 | 1991-09-25 | Toray Industries, Inc. | Flame-retardant nylon resin composition |
EP0543462A1 (en) * | 1991-11-18 | 1993-05-26 | Dsm N.V. | Flame retardant polyamides |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5256718A (en) * | 1990-02-14 | 1993-10-26 | Mitsui Petrochemical Industries, Ltd. | Flame retardant polyamide thermoplastic resin composition |
-
1992
- 1992-08-03 JP JP4206754A patent/JPH06263986A/en active Pending
-
1993
- 1993-12-02 WO PCT/US1993/011679 patent/WO1995015357A1/en not_active Application Discontinuation
- 1993-12-02 EP EP94903393A patent/EP0733082A4/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0172259A2 (en) * | 1983-04-13 | 1986-02-26 | Mitsubishi Gas Chemical Company, Inc. | Fire-retardant fiber-reinforced polyamide resin composition |
EP0270151A1 (en) * | 1986-11-04 | 1988-06-08 | Dsm N.V. | Polyamide composition |
JPS63139942A (en) * | 1986-12-02 | 1988-06-11 | Japan Synthetic Rubber Co Ltd | Nylon resin composition |
EP0410301A1 (en) * | 1989-07-27 | 1991-01-30 | BASF Aktiengesellschaft | Flame resistant thermoplastic mouldings |
EP0448221A1 (en) * | 1990-02-19 | 1991-09-25 | Toray Industries, Inc. | Flame-retardant nylon resin composition |
US5258439A (en) * | 1990-02-19 | 1993-11-02 | Toray Industries, Inc. | Flame-retardant nylon resin composition |
EP0543462A1 (en) * | 1991-11-18 | 1993-05-26 | Dsm N.V. | Flame retardant polyamides |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 012, no. 398 (C-538), 21 October 1988 & JP-A-63 139942 (JAPAN SYNTHETIC RUBBER CO LTD), 11 June 1988, * |
See also references of WO9515357A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0733082A4 (en) | 1997-03-05 |
WO1995015357A1 (en) | 1995-06-08 |
JPH06263986A (en) | 1994-09-20 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MATSUDA, TOYOHARU Inventor name: HAYASHI, RYUICHI |
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RHK1 | Main classification (correction) |
Ipc: C08L 77/00 |
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A4 | Supplementary search report drawn up and despatched |
Effective date: 19970115 |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18D | Application deemed to be withdrawn |
Effective date: 19970410 |