GB2312900A - Flame-retardant moulded polymer component - Google Patents

Flame-retardant moulded polymer component Download PDF

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Publication number
GB2312900A
GB2312900A GB9708572A GB9708572A GB2312900A GB 2312900 A GB2312900 A GB 2312900A GB 9708572 A GB9708572 A GB 9708572A GB 9708572 A GB9708572 A GB 9708572A GB 2312900 A GB2312900 A GB 2312900A
Authority
GB
United Kingdom
Prior art keywords
flame
component
retardant
melamine cyanurate
polyphosphonate
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.)
Granted
Application number
GB9708572A
Other versions
GB2312900B (en
GB9708572D0 (en
Inventor
Lee Hamilton Martin
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.)
Federal Mogul Technology Ltd
Original Assignee
T&N Technology Ltd
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
Priority claimed from GBGB9609606.0A external-priority patent/GB9609606D0/en
Application filed by T&N Technology Ltd filed Critical T&N Technology Ltd
Priority to GB9708572A priority Critical patent/GB2312900B/en
Publication of GB9708572D0 publication Critical patent/GB9708572D0/en
Publication of GB2312900A publication Critical patent/GB2312900A/en
Application granted granted Critical
Publication of GB2312900B publication Critical patent/GB2312900B/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
    • 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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3477—Six-membered rings
    • C08K5/3492—Triazines
    • C08K5/34928—Salts
    • 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
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
    • C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
    • C08K5/5333—Esters of phosphonic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Artificial Filaments (AREA)

Abstract

A flame-retardant moulded component e.g. a monoFilament comprises a matrix-forming polymer material. The component also comprises 5 to 20 wt% of melamine cyanurate, and 3-10 wt% of a polyphosphonate.

Description

FLAME-RETARDANT MOULDED COMPONENT This invention is concerned with a flame-retardant moulded component. The invention is particularly applicable to monofilaments for formation into braided sleeves used to protect electrical wires or pipes.
It is well-known to form moulded components from polymers such as nylon 6. For example, braided sleeves used for protecting wires or pipes from abrasion damage, for example in an engine compartment of a vehicle, are often formed from monofilaments of nylon 6. The monofilaments have a diameter of about 0.25 mm to about 3.25 mm.
It is also well-known to provide polyamides, eg nylon 6 or nylon 66, or other polymers with flame-retardancy properties by filling them with flame-retardant materials.
Typical applications include moulded containers for electrical equipment and coatings for electrical wires.
Melamine cyanurate is a known flame-retardant filler for use in polyamides for such applications. In the event of fire, the melamine cyanurate decomposes giving off flameretardant gases. However, as the proportion of melamine cyanurate increases, the flexibility and surface quality of the material decreases making the material prone to cracking. For this reason, providing sufficient melamine cyanurate for the required flame-retardancy renders the material unsuitable for many uses, for example for forming into the above-mentioned monofilaments. For this reason, the protective sleeves referred to above are not formed from flame-retardant monofilaments despite the obvious fire risks present in engine compartments.
Polyphosphonates are known as flame-retardant fillers in some polymeric matrices. However, they are not effective enough, when used alone, to enable a moulded component to pass flame-retardancy tests.
It is an object of the present invention to provide a flame-retardant moulded component which combines good flame-retardancy properties with good flexibility and good surface quality.
The invention provides a flame-retardant moulded component comprising a matrix-forming polymer material, the component also comprising 5 to 20 wt% of melamine cyanurate, and 3-10 wt% of a polyphosphonate.
In a component according to the invention, it is found that the presence of both melamine cyanurate and a polyphosphonate enables a greater proportion of melamine cyanurate to be included before the flexibility and surface quality become unacceptable. Furthermore, since, the polyphosphonate itself has flame-retardancy properties, the quantity of melamine cyanurate required is reduced. The polyphosphonate also acts as a plasticiser improving the mechanical properties of the component and assisting the dispersion of the melamine cyanurate. In particular, it is found that the component can be moulded in the form of a successful flame-retardant monofilament.
Preferably, the quantity of polyphosphonate is 3-10 wt%.
The matrix of a component according to the invention is, preferably, formed from nylon 6 but nylon 12 or 66 are also possible. Also possible are poly (ethylene terephthalate) and poly (ethylene naphthalate).
The polyphosphonate is preferably an organo polyphosphate called Amguard P45 and obtainable from Albright & Wilson.
There now follows a detailed description of an example which is illustrative of the invention.
In the example, 85 wt% of nylon 6 was compounded with 10 wt% of melamine cyanurate, in the form of particles averaging 10 microns in diameter, and with 5 wt% of Amguard P45. The mixture was extruded as a monofilament having a diameter of 3.25 mm. This monofilament was braided into a protective sleeve in a conventional manner.
The sleeve achieved the UL1441 VW-1 requirements for electrical sleeving and passed the UL94 Vo standard for flame retardancy at 0.8 mm thickness. The monofilaments had good flexibility and surface quality.

Claims (6)

1 A flame-retardant moulded component comprising a matrix-forming polymer material, the component also comprising 5 to 20 wt% of melamine cyanurate, and 3-10 wt% of a polyphosphonate.
2 A component according to claim 1, wherein the quantity of polyphosphonate is 3-10 wt%.
3 A component according to either one of claims 1 and 2, wherein the polymer material is selected from polyamide, poly (ethylene terephthalate) and poly (ethylene naphthalate).
4 A component according to any one of claims 1 to 3, wherein the quantity of melamine cyanurate is 5 to 15 wt%.
5 A flame-retardant moulded component substantially as hereinbefore described with reference to the illustrative example.
6 A component according to any one of claims 1 to 5, wherein the component is moulded as a monofilament.
GB9708572A 1996-05-08 1997-04-29 Flame-retardant monofilament Revoked GB2312900B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9708572A GB2312900B (en) 1996-05-08 1997-04-29 Flame-retardant monofilament

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9609606.0A GB9609606D0 (en) 1996-05-08 1996-05-08 Fire-resistant monofilament
GB9708572A GB2312900B (en) 1996-05-08 1997-04-29 Flame-retardant monofilament

Publications (3)

Publication Number Publication Date
GB9708572D0 GB9708572D0 (en) 1997-06-18
GB2312900A true GB2312900A (en) 1997-11-12
GB2312900B GB2312900B (en) 2000-03-29

Family

ID=26309282

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9708572A Revoked GB2312900B (en) 1996-05-08 1997-04-29 Flame-retardant monofilament

Country Status (1)

Country Link
GB (1) GB2312900B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035442A (en) * 1976-05-20 1977-07-12 E. I. Du Pont De Nemours And Company Polyester filaments flame retarded with end-capped poly(m-phenylene cyclohexylphosphonate)
US4866114A (en) * 1987-09-30 1989-09-12 Basf Aktiengesellschaft Self-extinguishing, thermoplastic polyphenylene ether/polyamide molding materials and their use for the production of moldings
EP0617079A2 (en) * 1993-03-22 1994-09-28 Elastogran GmbH Self extinguishing thermoplastic polyurethanes and process for their preparation
WO1996030441A1 (en) * 1995-03-31 1996-10-03 Siemens Aktiengesellschaft Non-flammable polyamides

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035442A (en) * 1976-05-20 1977-07-12 E. I. Du Pont De Nemours And Company Polyester filaments flame retarded with end-capped poly(m-phenylene cyclohexylphosphonate)
US4866114A (en) * 1987-09-30 1989-09-12 Basf Aktiengesellschaft Self-extinguishing, thermoplastic polyphenylene ether/polyamide molding materials and their use for the production of moldings
EP0617079A2 (en) * 1993-03-22 1994-09-28 Elastogran GmbH Self extinguishing thermoplastic polyurethanes and process for their preparation
WO1996030441A1 (en) * 1995-03-31 1996-10-03 Siemens Aktiengesellschaft Non-flammable polyamides

Also Published As

Publication number Publication date
GB2312900B (en) 2000-03-29
GB9708572D0 (en) 1997-06-18

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Legal Events

Date Code Title Description
773K Patent revoked under sect. 73(2)/1977