EP1846486A1 - Granules de polystyrene expansible (pse) ignifuges presentant un synergiste d'ignifugation dans le revetement - Google Patents

Granules de polystyrene expansible (pse) ignifuges presentant un synergiste d'ignifugation dans le revetement

Info

Publication number
EP1846486A1
EP1846486A1 EP06708006A EP06708006A EP1846486A1 EP 1846486 A1 EP1846486 A1 EP 1846486A1 EP 06708006 A EP06708006 A EP 06708006A EP 06708006 A EP06708006 A EP 06708006A EP 1846486 A1 EP1846486 A1 EP 1846486A1
Authority
EP
European Patent Office
Prior art keywords
flame
eps
granules
styrene polymer
retardant
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Withdrawn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
EP06708006A
Other languages
German (de)
English (en)
Inventor
Klaus Hahn
Gerd Ehrmann
Joachim Ruch
Markus Allmendinger
Bernhard Schmied
Jan Holoch
Klaus MÜHLBACH
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP1846486A1 publication Critical patent/EP1846486A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014—Use of organic additives
    • C08J9/0019—Use of organic additives halogenated
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/16—Making expandable particles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/224—Surface treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C08J2325/06—Polystyrene

Definitions

  • EPS expandable styrene polymer
  • the invention relates to flame-retardant, expandable styrene polymer (EPS) granules containing as flame retardants an organic bromine compound having a bromine content of at least 70 wt .-% and a Flammtiksynergisten, wherein at least a portion of the Flammtiksynergisten is in the form of a coating, and to processes for their preparation and use for self-extinguishing styrene polymer particulate foams.
  • EPS expandable styrene polymer
  • EPS expandable styrene polymer
  • DE-A 42 40 109 describes finely divided, expandable styrene polymers which contain flame retardants and flame retardant synergist both in a homogeneous distribution in the styrene polymer and as a surface coating.
  • the prefoamed particles can be welded to self-extinguishing foam blocks by further treatment with steam with non-flame retarded polystyrene foam recyclate.
  • the object of the invention is therefore to remedy the disadvantages mentioned and to find flame-retardant, expandable styrene polymers with sufficient flame retardancy, which can be produced reproducibly with lower amounts of flame retardant synergists.
  • the flame-retardant, expandable styrene polymers (EPS) granules according to the invention preferably comprise (EPS) granules a) 0.1 to 5 wt .-%, in particular 0.3 to 2 wt .-% of the organic bromine compound and b) 0.01 to 1, 0 wt .-%, in particular 0.1 to 0.5 wt. -% of a flame retardant synergist.
  • the coating preferably contains no organic bromine compound and the flame retardant synergist is present in the coating at from 40 to 100% by weight, in particular from 70 to 95% by weight.
  • styrene polymers to glassy polystyrene (GPPS), toughened polystyrene (HIPS), anionically polymerized polystyrene or toughened polystyrene (A-IPS), styrene- ⁇ -methstyrene copolymers, acrylonitrile-butadiene-styrene polymers (ABS), styrene-acrylonitrile (SAN ) Acrylonitrile-styrene-acrylic esters (ASA), methyl acrylate-butadiene-styrene (MBS), methyl methacrylate-acrylonitrile-butadiene-styrene (MABS) - polymers or mixtures thereof or with polyphenylene ether (PPE) used.
  • GPPS glassy polystyrene
  • HIPS toughened polystyrene
  • A-IPS anionically polymerized polystyrene or toughened polystyren
  • the expandable styrenic polymer has a molecular weight in the range of 190,000 to 400,000 g / mol, more preferably in the range of 220,000 to
  • the expandable styrene polymer (EPS) granules generally contain one or more blowing agents in a homogeneous distribution in a proportion of 2 to 10 wt .-%, preferably 3 to 7 wt .-%, based on the EPS granules.
  • Suitable blowing agents are the physical blowing agents commonly used in EPS, such as aliphatic hydrocarbons having 2 to 7 carbon atoms, alcohols, ketones, ethers or halogenated hydrocarbons. Preference is given to using isobutane, n-butane, isopentane, n-pentane.
  • the flame retardants used are organic bromine compounds having a bromine content of at least 70% by weight.
  • Particularly suitable are aliphatic, cycloaliphatic and aromatic bromine compounds, such as hexacyclododecane, pentabrammonochlocyclohexane, pentabromophenyl allyl ether.
  • Suitable flame retardant synergists are thermal free-radical formers having half-lives of 6 minutes at temperatures ranging from 110 to 300 ° C, preferably 140 to 230 0 C.
  • the EPS granulate contains hexabromocyclododecane (HBCD) as flame retardant and dicumyl or dicumyl peroxide as flame retardant synergist.
  • HBCD hexabromocyclododecane
  • dicumyl or dicumyl peroxide flame retardant synergist.
  • the weight ratio of flame retardant synergist to organic bromine compound is usually in the range of 1 to 20, preferably in the range of 2 to 5.
  • the flame-retardant, expandable styrene polymer (EPS) granules according to the invention can be prepared by melt impregnation of styrene polymers and subsequent underwater granulation or suspension polymerization of styrenic monomers.
  • EPS expandable styrene polymer
  • at least a part of the flame retardant or the flame retardant components is incorporated into the styrene polymer melt or polymerized styrene monomers in their presence and then coated the resulting EPS granules with the rest of the flame retardants or flame retardant components.
  • EPS expandable styrene polymers
  • the residence time of the flame retardant and the flame retardant synergist can be maintained at a melt temperature in the range of 140 to 220 ° C, preferably in the range of 170 to 200 ° C at less than 15 minutes
  • additives, nucleating agents, fillers, plasticizers, soluble and insoluble inorganic and / or organic dyes and pigments may be added to the styrene polymer melt together or spatially separated, eg via mixers or side extruders.
  • the dyes and pigments are added in amounts ranging from 0.01 to 30, preferably in the range of 1 to 5 wt .-%.
  • a dispersing assistant for example organosilanes, polymers containing epoxy groups or maleic anhydride-grafted styrene polymers.
  • Preferred plasticizers are mineral oils, phthalates, which can be used in amounts of 0.05 to 10 wt .-%, based on the styrene polymer.
  • the finished expandable styrene polymer granules can additionally be coated by glycerol esters, antistatic agents or anticaking agents.
  • the EPS granules may contain glycerol monostearate GMS (typically 0.25%), glycerol tristearate (typically 0.25%) finely divided silica Aerosil R972 (typically 0.12%) and Zn stearate (typically 0.15%), and antistatic be coated.
  • GMS typically 0.25%
  • glycerol tristearate typically 0.25%
  • finely divided silica Aerosil R972 typically 0.12%
  • Zn stearate typically 0.15%
  • the flame-retardant expandable styrene polymer granules according to the invention can be prefoamed in a first step by means of hot air or steam to give foam particles having a density in the range from 8 to 100 g / l and, in a second step, sealed in a closed mold to form self-extinguishing particle moldings.
  • PS polystyrene melt
  • VZ viscosity number
  • the mixture of polystyrene melt, blowing agent and flame retardant was conveyed at 60 kg / h through a nozzle plate with 32 holes (diameter of the nozzle 0.75 mm). With the help of pressurized underwater granulation, compact granules with a narrow size distribution were produced.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne des granulés de polystyrène expansible (PSE) ignifugés, qui comprennent comme agent ignifugeant un composé de brome organique présentant une teneur en brome d'au moins 70 % en poids et un synergiste d'ignifugation dont au moins une partie se présente sous forme d'un revêtement. Cette invention concerne également des procédés pour produire ces granulés, ainsi que leur utilisation pour des mousses particulaires de polystyrène auto-extinguibles.
EP06708006A 2005-02-04 2006-02-03 Granules de polystyrene expansible (pse) ignifuges presentant un synergiste d'ignifugation dans le revetement Withdrawn EP1846486A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510005494 DE102005005494A1 (de) 2005-02-04 2005-02-04 Flammgeschützte, expandierbare Styrolpolymer (EPS)-Granulate mit Flammschutzsynergist in der Beschichtung
PCT/EP2006/050652 WO2006082233A1 (fr) 2005-02-04 2006-02-03 Granules de polystyrene expansible (pse) ignifuges presentant un synergiste d'ignifugation dans le revetement

Publications (1)

Publication Number Publication Date
EP1846486A1 true EP1846486A1 (fr) 2007-10-24

Family

ID=36084151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708006A Withdrawn EP1846486A1 (fr) 2005-02-04 2006-02-03 Granules de polystyrene expansible (pse) ignifuges presentant un synergiste d'ignifugation dans le revetement

Country Status (3)

Country Link
EP (1) EP1846486A1 (fr)
DE (1) DE102005005494A1 (fr)
WO (1) WO2006082233A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100004348A1 (en) 2006-12-18 2010-01-07 Frank Braun Expandable styrene polymers and foams with decreased water absorption
ITMI20071005A1 (it) * 2007-05-18 2008-11-19 Polimeri Europa Spa Procedimento per la preparazione di granuli a base di polimeri termoplastici espandibili e relativo prodotto
DE102008038916A1 (de) 2008-08-13 2010-02-18 Basf Se Expandierbare Styrolpolymere mit halogenfreier Flammschutzbeschichtung
WO2022128001A1 (fr) 2020-12-17 2022-06-23 Hochschule Hamm-Lippstadt Copolymères ignifugés et composés de moulage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB927872A (en) * 1960-05-17 1963-06-06 Shell Res Ltd Flame-retardant cellular polymers of vinyl-aromatic compounds
DE4009897A1 (de) * 1990-03-28 1991-10-02 Basf Ag Feinteilige expandierbare styrolpolymerisate
DE4240109A1 (de) * 1992-11-28 1994-06-01 Basf Ag Feinteilige, expandierbare Styrolpolymerisate, insbesondere für das Recycling von Polystyrol-Partikelschaumstoffen
DE19508939A1 (de) * 1995-03-13 1996-09-19 Basf Ag Verfahren zur Herstellung von flammgeschützten, Polystyrolschaum-Recyclat enthaltenden Polystyrol-Partikelschaumstoffen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006082233A1 *

Also Published As

Publication number Publication date
DE102005005494A1 (de) 2006-08-10
WO2006082233A1 (fr) 2006-08-10

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