EP1068263A1 - Synergiste pour nylons ignifuges - Google Patents

Synergiste pour nylons ignifuges

Info

Publication number
EP1068263A1
EP1068263A1 EP99912654A EP99912654A EP1068263A1 EP 1068263 A1 EP1068263 A1 EP 1068263A1 EP 99912654 A EP99912654 A EP 99912654A EP 99912654 A EP99912654 A EP 99912654A EP 1068263 A1 EP1068263 A1 EP 1068263A1
Authority
EP
European Patent Office
Prior art keywords
composition
polyamide
flame retardant
molding
antimony
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Withdrawn
Application number
EP99912654A
Other languages
German (de)
English (en)
Inventor
Marvin Michael Martens
Reiko Koshida
Wendy Tobin
Joycelyn M. Willis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP1068263A1 publication Critical patent/EP1068263A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/02—Halogenated hydrocarbons
    • C08K5/03—Halogenated hydrocarbons aromatic, e.g. C6H5-CH2-Cl
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/387—Borates

Definitions

  • the invention relates to polyamide molding compositions having improved flame resistance. More particularly, the invention relates to antimony- free polyamide compositions with superior physical properties. Description of Prior Art
  • antimony compounds antimony oxides and sodium antimonate
  • Industry has been trying for years to eliminate the toxic heavy metal antimony in flame retardant compositions, but has been unable to develop anything nearly as effective as antimony compounds.
  • zinc borate could be used as a direct (equally effective) replacement for antimony compounds in polyamide compositions.
  • Another unexpected side benefit of this discovery is a significant improvement in physical properties (i.e. tensile strength and elongation to break) by using the zinc borate as a synergist.
  • antimony-free polyamide molding compositions with improved flame resistance comprising, in weight percent, (a) 20 - 77% polyamide, having a melting point of 215 - 340°C,
  • the polyamide used in this invention may be 20-77% (all percentages are weight percent unless designated otherwise) of any polyamide that has a melting point of from about 215°C to about 340°C.
  • An example of a suitable polyamide is a copolyamide composed of 20-80 mole % of units derived from hexamethylene terephthalamide and 80-20 mole % of units derived from hexamethylene adipamide. This polyamide is referred to hereinafter as 6T/66 copolymer.
  • polystyrene resin examples include polyamides composed of 20-80 mole % of units derived from hexamethylene terephthalamide and 80-20 mole % of units derived from hexamethylene sebacamide, hexamethylene dodecamide, hexamethylene isophthalamide, 2-methylpentamethylene terephthalamide, or mixtures thereof.
  • Synthetic polyamide includes a polymer which is made by man, and does not include natural fibers such as wools or silks.
  • an “aliphatic polyamide” is meant a polymer which has repeat units which include amide groups in the main chain, and in which at least some, preferably at least 50 mole percent, of these amide groups (through the nitrogen atoms and/or carbonyl carbon atoms of the amide groups) are connected to aliphatic carbon atoms.
  • Preferred polyamides include nylon-6,6, nylon-6, nylon 6,12, and copolymers of nylon-6,6 and nylon 6.
  • Nylon-6,6 and nylon-6, and copolymers thereof, are especially preferred and nylon-6,6 is more preferred.
  • copolyamide used in the composition of the present invention. It may be produced easily by ordinary melt polymerization.
  • One method to produce the copolymer of this invention is an autoclave one-step polymerization process taught in US Patent No. 5,378,800 which is incorporated by reference herein. That process includes feeding to a reactor an aqueous salt solution of an admixture of desired diacids and diamines, heating the solution under pressure, reducing the pressure, maintaining the reaction mixture at a pressure that is not greater than about atmospheric pressure, and discharging the polyamide from the reactor.
  • An alternative process includes preparing a prepolymer and subjecting the prepolymer to solid-phase polymerization or melt-mixing in an extruder to increase the degree of polymerization.
  • the prepolymer is prepared by heating at 150°C-320°C an aqueous solution containing 6T salt (a salt formed from hexamethylenediamine and terephthalic acid) and 66 salt (a salt formed from hexamethylenediamine and adipic acid).
  • 6T salt a salt formed from hexamethylenediamine and terephthalic acid
  • 66 salt a salt formed from hexamethylenediamine and adipic acid
  • the composition of the present invention contains 10-60% of an inorganic filler or reinforcing agent that includes, for example, fibrous reinforcement such as glass fiber and carbon fiber, glass beads, talc, kaolin, wollastonite and mica.
  • fibrous reinforcement such as glass fiber and carbon fiber
  • glass beads Preferable among them is glass fiber.
  • Glass fibers suitable for use in the present invention are those generally used as a reinforcing agent for thermoplastics resins and thermosetting resins.
  • Preferred glass fiber is in the form of glass rovings, glass chopped strands, and glass yarn made of continuous glass filaments 3-20 micron meters in diameter.
  • the resin composition of the present invention contains 10-35% of a flame retardant. It is a flame retardant based on brominated polystyrene and/or brominated poly-phenylene ether containing 50-70%) by weight bromine.
  • the polystyrene has a weight-average molecular weight higher than 5000, preferably higher than 20,000, and more preferably higher than 28,000.
  • the ether has a molecular weight of at least 6000.
  • a preferred flame retardant is brominated polystyrene or polydibromostyrene.
  • the present compositions comprise 3-10% zinc borate, but no antimony compounds.
  • copolyamide resin of the present invention may have incorporated in it a variety of additives such as an impact modifier, a viscosity modifier, pigment, dye, antioxidant, and heat resistance improver, in such amounts that they do not harm its characteristic properties.
  • the copolyamide resins of the present invention may include up to 5% of color concentrate (such as carbon black) as well as up to 1% of lubricant. Drip suppressants may also be present in amounts of up to 5%.
  • the flammability rating was conducted using UL Test No. UL-94 dated April 19, 1995.
  • Surlyn® is ethylene copolymer ionomer by E. I. DuPont, Wilmington, Delaware

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

L'invention porte sur des compositions de moulage polyamide sans antimoine dont l'ininflammabilité a été améliorée. Ces compositions comprennent, en pourcentage en poids, 20 à 77 % d'un polyamide dont le point de fusion est compris entre 215 et 340 °C; 10 à 60 % d'une charge inorganique; 10 à 35 % d'un composé ignifuge comprenant entre 50 et 70 % de brome; 3 à 10 % de borate de zinc; et 0 à 2 % d'un stabilisant thermique.
EP99912654A 1998-03-18 1999-03-18 Synergiste pour nylons ignifuges Withdrawn EP1068263A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US7839298P 1998-03-18 1998-03-18
US78392P 1998-03-18
PCT/US1999/005902 WO1999047597A1 (fr) 1998-03-18 1999-03-18 Synergiste pour nylons ignifuges

Publications (1)

Publication Number Publication Date
EP1068263A1 true EP1068263A1 (fr) 2001-01-17

Family

ID=22143764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99912654A Withdrawn EP1068263A1 (fr) 1998-03-18 1999-03-18 Synergiste pour nylons ignifuges

Country Status (4)

Country Link
EP (1) EP1068263A1 (fr)
JP (1) JP2002506905A (fr)
CA (1) CA2322286A1 (fr)
WO (1) WO1999047597A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7816438B2 (en) 2005-04-08 2010-10-19 Mitsui Chemicals, Inc. Flame-retardant polyamide composition

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070267607A1 (en) * 2004-01-30 2007-11-22 Mitsui Chemicals, Inc. Flame-Retardant Polyamide Composition and Use Thereof
CN101374897B (zh) * 2006-01-26 2012-07-04 帝斯曼知识产权资产管理有限公司 阻燃聚酰胺模制组合物
WO2010019746A2 (fr) * 2008-08-15 2010-02-18 Invista Technologies S. Ar. L. Composites polymères, fibres, et tapis ignifugeants, et procédés de fabrication de chacun
EP2964702A1 (fr) * 2013-03-07 2016-01-13 Basf Se Compositions de moulage thermoplastique thermoconducteur comprenant un agent ignifugeant
US20140288220A1 (en) * 2013-03-25 2014-09-25 E I Du Pont De Nemours And Company Heat resistant polyamide compositions

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4360616A (en) * 1980-12-31 1982-11-23 E. I. Du Pont De Nemours And Company Flame-retardant polyamide compositions
GB8307407D0 (en) * 1983-03-17 1983-04-27 Ici Plc Flame retardant polyamide compositions
DE3924869A1 (de) * 1989-07-27 1991-01-31 Basf Ag Flammgeschuetzte thermoplastische formmassen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9947597A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7816438B2 (en) 2005-04-08 2010-10-19 Mitsui Chemicals, Inc. Flame-retardant polyamide composition

Also Published As

Publication number Publication date
CA2322286A1 (fr) 1999-09-23
JP2002506905A (ja) 2002-03-05
WO1999047597A1 (fr) 1999-09-23

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