EP1537171A1 - Procede pour produire des particules de mousse de polystyrene a faible densite apparente - Google Patents

Procede pour produire des particules de mousse de polystyrene a faible densite apparente

Info

Publication number
EP1537171A1
EP1537171A1 EP03793763A EP03793763A EP1537171A1 EP 1537171 A1 EP1537171 A1 EP 1537171A1 EP 03793763 A EP03793763 A EP 03793763A EP 03793763 A EP03793763 A EP 03793763A EP 1537171 A1 EP1537171 A1 EP 1537171A1
Authority
EP
European Patent Office
Prior art keywords
blowing agent
polymer melt
foam particles
thermoplastic polymer
polystyrene
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Withdrawn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
EP03793763A
Other languages
German (de)
English (en)
Inventor
Franz-Josef Dietzen
Gerd Ehrmann
Klaus Hahn
Swen RÜCK
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 EP1537171A1 publication Critical patent/EP1537171A1/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Withdrawn legal-status Critical Current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
    • C08J9/16—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
    • C08J9/0066—Use of inorganic compounding ingredients
    • 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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/127—Mixtures of organic and inorganic blowing agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions 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; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • 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
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
    • C08J2201/03—Extrusion of the foamable blend
    • 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
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/06—CO2, N2 or noble gases
    • 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
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/12—Organic compounds only containing carbon, hydrogen and oxygen atoms, e.g. ketone or alcohol
    • 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
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
    • 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
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
    • C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after 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

  • the invention relates to a method for producing foam particles with a low bulk density from thermoplastic polymers by extrusion of a polymer melt containing blowing agent, and foam particles obtainable by the method.
  • Polystyrene foam particles with low bulk densities in the range from 10 to 30 kg / m 3 can be produced, for example, by foaming pentane-containing, expandable polystyrene granules (EPS), which can be obtained by suspension polymerization.
  • EPS pentane-containing, expandable polystyrene granules
  • Such a method for producing discrete, closed-cell foam strands made of polystyrene is described, for example, in EP-A 0 665 865.
  • Environmentally friendly blowing agent mixtures containing at least 20% by weight of carbon dioxide or ethane are used as blowing agents.
  • the foam strands have to be expanded in a further stage with heated air or steam.
  • EP-A 0 981 574 describes particulate expandable styrene polymers which contain graphite particles in a homogeneous distribution in order to reduce the thermal conductivity.
  • the compact, blowing agent-containing granules can be produced, for example, by mixing polystyrene, graphite and pentane in a twin-screw extruder and then foamed to a lower density by vapor deposition.
  • the object of the invention was to find a process for producing foam particles from thermoplastic polymers which, by extrusion of a polymer melt containing blowing agent, leads directly to foam particles of low bulk density without additional expansion stages.
  • the process should also be suitable for the production of foam particles of low bulk density which contain IR absorbers. Accordingly, there has been a process for making foam particles from thermoplastic polymers comprising the steps
  • the blowing agent containing water and a solubilizer.
  • the blowing agent contains water, generally in amounts in the range from 0.1 to 3% by weight, preferably in the range from 0.5 to 1.5% by weight, based on the thermoplastic polymer used.
  • a solubilizer is additionally added according to the invention.
  • Aliphatic alcohols, ketones, ethers, esters or silicates are suitable as solubilizers.
  • Ethanol is preferably used.
  • Adsorbents are solids that can bind water in physical or chemical form, for example aluminum hydroxide, layered silicates or zeolites.
  • the solubilizer or adsorbent is generally used in amounts of 0.1 to 3% by weight, preferably in the range of 1 to 2% by weight, based on the
  • the blowing agent can contain the aliphatic, halogenated or halogen-free hydrocarbons with 3 to 10, preferably 4 to 6 carbon atoms, such as i-
  • inert gases such as carbon dioxide or nitrogen in amounts generally in the range of 0.1 to 10, preferably 0.3 to 7 wt .-%, based on the thermoplastic polymer used .
  • inert gases for example carbon dioxide
  • Styrene polymers such as crystal-clear or impact-resistant polystyrene, styrene copolymers with up to 45-20% by weight of ethylenically unsaturated comonomers such as alphamethylstyrene or acrylonitrile or polyolefins such as polyethylene can be used as thermoplastic polymers or polypropylene or mixtures of these polymers with one another or with polyphenylene ether.
  • thermoplastic polymers with a broad molecular weight distribution Polystyrene with a molecular weight distribution M w / M n of at least 2.5 is particularly preferably used.
  • Thermoplastic polymers with a bimodal or multimodal molecular weight distribution can also be used. Such bimodal or multimodal molecular weight distributions can be set, for example, by mixing thermoplastic polymers of different molecular weights.
  • Low molecular weight polystyrene with a molecular weight M w in the range from 150,000 to 250,000 g / mol is particularly preferred, with high molecular weight polystyrene with a molecular weight in the range from 280,000 to
  • thermoplastic polymer for example polystyrene with a molecular weight in the range from 2,000 to 10,000 g / mol, is added to the thermoplastic polymer.
  • infrared absorbers for example graphite, aluminum powder or carbon black
  • Graphite has proven to be particularly effective as an IR absorber.
  • the IR absorbers are particularly preferably used in amounts of 0.1 to 2.5% by weight, based on the thermoplastic polymer melt.
  • the IR absorber can be metered into the thermoplastic polymer melt before or after the addition of the blowing agent.
  • the usual additives such as flame retardants, nucleating agents, UV stabilizers, plasticizers, pigments and antioxidants can be added to the thermoplastic polymer melt.
  • the auxiliaries and IR absorbers can be added particularly advantageously in the form of additive batches in the same thermoplastic polymer to the polymer melt.
  • the foam particles obtained can be coated with the known coating agents, such as metal stearates, glycerol esters or finely divided silicates.
  • the process according to the invention is characterized in that foam particles with a low bulk density, in particular with bulk densities of less than 30 kg / m 3 , in particular in the range from 15 to 25 kg / m 3 , are obtained directly and can be welded directly into moldings without pre-foaming.
  • the foam particles according to the invention can also be heated, for example Pre-foamed water vapor to even lower bulk densities.
  • Static or dynamic mixers for example extruders, are suitable for carrying out this method.
  • the escaping polymer melt containing blowing agent can be chopped off with the help of rotating knives, for example in an underwater granulator or water ring granulator, to form granules which foam up to foam particles by deliberately set pressure relief.
  • PS 1 polystyrene with a melt index MVR (200 ° C / 5 kg) of
  • PS 2 polystyrene with a melt index MVR (200 ° C / 5 kg) of
  • PS ULM polystyrene with a molecular weight M w of 4,600 g / mol
  • PS UHM polystyrene with a molecular weight M w of
  • Polystyrene PS 1 was melted together with 0.25% by weight of talc in a heated twin-screw extruder (ZSK 53) and the blowing agent composition given in Table 1 was metered in at a melt temperature of about 200 ° C.
  • the melt containing blowing agent was cooled and extruded through a die plate with holes with a diameter of 1.0 mm.
  • the emerging melt was cut directly behind the nozzle and foamed to foam particles at atmospheric pressure.
  • Examples 1-9 led to comparatively higher bulk densities without the addition of water and solubilizer.
  • Example 9 was repeated with the polystyrene mixtures listed in Table 2.
  • Example 2 was repeated, the parts by weight of graphite given in Table 3 being added to the polystyrene instead of talc.

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)
  • Inorganic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un procédé pour produire des particules de mousse de faible densité apparente à partir de polymères thermoplastiques, ce procédé comprenant les opérations suivantes : a) addition d'un produit moussant à une matière polymère fondue thermoplastique, b) refroidissement et extrusion de la matière polymère contenant le produit moussant au moyen d'une filière, c) coupe de la matière polymère contenant le produit moussant derrière la filière à pression réduite, avec moussage pour former les particules de mousse, le produit moussant contenant de l'eau et un agent de solubilisation. La présente invention porte également sur des particules de mousse réalisées selon ce procédé.
EP03793763A 2002-09-04 2003-08-28 Procede pour produire des particules de mousse de polystyrene a faible densite apparente Withdrawn EP1537171A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10241298A DE10241298A1 (de) 2002-09-04 2002-09-04 Verfahren zur Herstellung von Polystyrolschaumpartikeln mit niedriger Schüttdichte
DE10241298 2002-09-04
PCT/EP2003/009521 WO2004022636A1 (fr) 2002-09-04 2003-08-28 Procede pour produire des particules de mousse de polystyrene a faible densite apparente

Publications (1)

Publication Number Publication Date
EP1537171A1 true EP1537171A1 (fr) 2005-06-08

Family

ID=31724426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03793763A Withdrawn EP1537171A1 (fr) 2002-09-04 2003-08-28 Procede pour produire des particules de mousse de polystyrene a faible densite apparente

Country Status (10)

Country Link
US (1) US20060167123A1 (fr)
EP (1) EP1537171A1 (fr)
KR (1) KR101024762B1 (fr)
CN (1) CN1329434C (fr)
AU (1) AU2003264117A1 (fr)
BR (1) BR0313928A (fr)
DE (1) DE10241298A1 (fr)
MX (1) MXPA05002147A (fr)
PL (1) PL206019B1 (fr)
WO (1) WO2004022636A1 (fr)

Families Citing this family (14)

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DE10358804A1 (de) * 2003-12-12 2005-07-14 Basf Ag Expandierbare Styrolpolymergranulate mit bi- oder multimodaler Molekulargewichtsverteilung
DE102004044380A1 (de) * 2004-09-10 2006-03-30 Basf Ag Halogenfreie, flammgeschützte Polymerschaumstoffe
DE102005015891A1 (de) 2005-04-06 2006-10-12 Basf Ag Verfahren zur Herstellung von Polystyrolschaumpartikeln hoher Dichte
US8119701B2 (en) * 2005-10-24 2012-02-21 Owens Corning Intellectual Capital, Llc Method of manufacturing polystyrene foam with polymer processing additives
US7624910B2 (en) 2006-04-17 2009-12-01 Lockheed Martin Corporation Perforated composites for joining of metallic and composite materials
US20070173554A1 (en) 2005-10-27 2007-07-26 Yadollah Delaviz Method of manufacturing polystyrene foam with polymer processing additives
CN101711264A (zh) * 2007-05-15 2010-05-19 陶氏环球技术公司 具有良好表面性质、高绝热性质以及低密度的链烯基-芳族泡沫体
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
ITMI20071003A1 (it) 2007-05-18 2008-11-19 Polimeri Europa Spa Compositi a base di polimeri vinilaromatici aventi migliorate proprieta' di isolamento termico e procedimento per la loro preparazione
WO2009153345A2 (fr) * 2008-06-20 2009-12-23 Golden Trade S.R.L. Procédé de décoloration et/ou de vieillissement des tissus, et tissus décolorés et/ou vieillies obtenus à partir de ceux-ci
IT1396193B1 (it) 2009-10-07 2012-11-16 Polimeri Europa Spa Composizioni polimeriche nanocomposite termoplastiche espansibili con migliorata capacita' di isolamento termico.
EP2452968A1 (fr) 2010-11-11 2012-05-16 Basf Se Procédé de fabrication de particules thermoplastiques extensibles ayant une capacité d'extension améliorée
WO2015049008A1 (fr) 2013-10-04 2015-04-09 Orion Engineered Carbons Gmbh Matériau carboné dans le domaine micrométrique pour isolation thermique
TWI667285B (zh) 2013-10-18 2019-08-01 德商巴斯夫歐洲公司 膨脹熱塑性彈性體之製造

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Also Published As

Publication number Publication date
MXPA05002147A (es) 2005-05-23
DE10241298A1 (de) 2004-03-18
KR20050057128A (ko) 2005-06-16
KR101024762B1 (ko) 2011-03-24
PL206019B1 (pl) 2010-06-30
US20060167123A1 (en) 2006-07-27
CN1678670A (zh) 2005-10-05
AU2003264117A1 (en) 2004-03-29
PL375394A1 (en) 2005-11-28
BR0313928A (pt) 2005-07-12
WO2004022636A1 (fr) 2004-03-18
CN1329434C (zh) 2007-08-01

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