DE19631251A1 - Low-flammability granular material made from scrap tyre rubber granules to construct e.g. vibration dampers or conveyor belts - Google Patents

Low-flammability granular material made from scrap tyre rubber granules to construct e.g. vibration dampers or conveyor belts

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Publication number
DE19631251A1
DE19631251A1 DE1996131251 DE19631251A DE19631251A1 DE 19631251 A1 DE19631251 A1 DE 19631251A1 DE 1996131251 DE1996131251 DE 1996131251 DE 19631251 A DE19631251 A DE 19631251A DE 19631251 A1 DE19631251 A1 DE 19631251A1
Authority
DE
Germany
Prior art keywords
flame
retardant
flammability
particles
polymer
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Withdrawn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
DE1996131251
Other languages
German (de)
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.)
ContiTech AG
Original Assignee
ContiTech AG
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 ContiTech AG filed Critical ContiTech AG
Priority to DE1996131251 priority Critical patent/DE19631251A1/en
Publication of DE19631251A1 publication Critical patent/DE19631251A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
    • B29L2031/7092—Conveyor belts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Abstract

A low-flammability granular material, made of comminuted rubber waste is new. The particles (1) include a core (2) of waste rubber, coated by a low-flammability casing (3). This comprises cross-linked polymer mixed with flame retardant. Also claimed are (A) manufacture of the material comprising (i) mixing comminuted waste rubber with a flame retardant and an aqueous dispersion or emulsion of crosslinkable polymer components, (ii) heating until crosslinking is initiated, and (iii) encasing the particles with the polymer, without adhering to them; and (B) use of the material, where the particles (1) are mixed, preferably with a low flammability elastomeric binder (4), which is moulded into low-flammability, especially vibration-damping sections e.g. layers, bands, blocks, or mouldings (5).

Description

Die Erfindung betrifft einen schwerentflammbaren Werkstoff gemäß dem Oberbegriff des Patentanspruchs 1. Bekannte Werkstoffe dieser Art konnten bisher nur in Form von Altgummipartikeln bereitgestellt werden, zu deren Herstellung man von aus Gummi bestehenden Altprodukten ausging, die bereits in ihrer ursprünglichen Verwendungsform die Kriterien der Schwerentflammbarkeit erfüllten, wie z. B. Untertage- Förderbänder.The invention relates to a flame-retardant material according to the preamble of claim 1. Known Until now, materials of this type could only be used in the form of Waste rubber particles are provided for their manufacture one started out from old rubber products that the criteria in their original form of use the flame retardancy met, such as. B. underground Conveyor belts.

Dagegen sind insbesondere die in großen Mengen als Altmaterial anfallenden Kraftfahrzeug-Reifen in der Regel aus Gummimischungen hergestellt, die die Schwerentflammbarkeits-Kriterien nicht erfüllen, so daß Altreifen-Granulate im allgemeinen nicht schwerentflammbar sind und nicht ohne weiteres zu schwerentflammbaren Produkten verarbeitet werden können. Beispielsweise scheiterte auch eine Verarbeitung von aus Fahrzeugreifen gewonnenem Altgummigranulat zu schwer entflammbaren Formkörpern durch Formung eines Gemischs aus diesem Granulat und einem schwer entflammbar ausgerüsteten Kunststoff bisher daran, daß der Kunststoff bei Feuereinwirkung schmolz, wodurch das Altgummigranulat freigelegt und entzündet wurde.On the other hand, especially those in large quantities are used material accruing automobile tires as a rule Rubber compounds made that meet the flame retardancy criteria not meet, so that used tire granules in are generally not flame retardant and not without further processed into flame-retardant products can. For example, processing of Waste rubber granulate obtained from vehicle tires is too heavy flammable moldings by molding a mixture this granulate and a flame retardant So far plastic that the plastic at Fire melted, causing the waste rubber granulate exposed and ignited.

Es stellte sich daher die Aufgabe, einen Weg aufzuzeigen, um aus zerkleinertem Altgummi - insbesondere aus Fahrzeugreifen - einen schwer entflammbareren granulatartigen Werkstoff zu bilden, aus dem sich schwerentflammbare - insbesondere schwingungsdämmende - Schichten, Bahnen, Blöcke, Formkörper u. ä. bilden ließen.The task therefore was to show a way to made from shredded waste rubber - especially from vehicle tires - a more inflammable granular material form from which flame retardant - in particular vibration-damping - layers, sheets, blocks, moldings u. let form.

Diese Aufgabe wird erfindungsgemäß durch ein Altgummigranulat gelöst, das die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale aufweist. In den Unteransprüchen sind bevorzugte Ausführungsformen des erfindungsgemäßen Werkstoffs sowie vorteilhafte Verfahren zu seiner Herstellung angegeben.According to the invention, this object is achieved by means of a waste rubber granulate solved that in the characterizing part of claim 1 Features specified. In the subclaims are preferred embodiments of the material according to the invention as well as advantageous processes for its preparation.

Im folgenden wird die Erfindung unter Bezugnahme auf die Prinzipdarstellungen der beigefügten Zeichnung erläutert:In the following the invention with reference to the Principle representations of the attached drawing explained:

Fig. 1 gibt ein einzelnes Granulatteilchen gemäß der vorliegenden Erfindung in stark vergrößertem Maßstab wieder, während Fig. 2 in etwas weniger vergrößerter schematischer Darstellung einen Schnitt durch einen schwerentflammbaren Formkörper zeigt, der aus dem erfindungsgemäßen Werkstoff gebildet ist, wobei die erfindungsgemäßen mit einer schwer­ entflammbaren Umhüllung versehenen Gummipartikel in eine Matrix aus einem insbesondere schwerentflammbaren Polymer eingebettet sind. Fig. 1 shows a single granule according to the present invention on a greatly enlarged scale, while Fig. 2 shows a somewhat less enlarged schematic representation of a section through a flame-retardant molded body which is formed from the material according to the invention, the inventive according to a flame-retardant Covered rubber particles are embedded in a matrix made of a flame-retardant polymer in particular.

Wie Fig. 1 erkennen läßt, bestehen die einzelnen Partikel 1 des erfindungsgemäßen granulatartigen Werkstoffs jeweils aus einem Altgummikern 2 und einer schwerentflammbaren Umhüllung 3, wobei diese Umhüllung 3 aus einer Mischung aus einem vernetzenden Polymer und einer flammhemmenden Substanz gebildet ist. Während der Kern 2 aus beliebigem, normal- oder sogar leichtentflammbarem Altgummi bestehen kann und vorzugsweise aus gebrauchten Fahrzeugreifen hergestellt ist, wird zur Bildung der schwerentflammbaren Umhüllung 3 eine Mischung aus einem vernetzenden Polymer - und zwar vorzugsweise einem Kautschuk - und einer flammhemmenden Substanz verwendet, wobei sich als flammhemmende Substanzen Magnesiumhydroxid und Aluminiumhydroxid als besonders wirksam erwiesen haben.As can be seen in FIG. 1, the individual particles 1 of the granular material according to the invention each consist of an old rubber core 2 and a flame-retardant casing 3 , this casing 3 being formed from a mixture of a crosslinking polymer and a flame-retardant substance. While the core 2 can consist of any normal or even highly flammable rubber and is preferably made from used vehicle tires, a mixture of a crosslinking polymer - and preferably a rubber - and a flame-retardant substance is used to form the flame-retardant casing 3 , whereby Magnesium hydroxide and aluminum hydroxide have proven to be particularly effective as flame retardant substances.

Zur Herstellung des erfindungsgemäßen Werkstoffs verfährt man vorzugsweise wie folgt:
Zerkleinerter Altgummi und die flammhemmende Substanz werden miteinander und einer wäßrigen Dispersion oder Emulsion aus vernetzbaren Polymerkomponenten innig vermischt, und der Mischvorgang wird unter Wärmezufuhr bis zur Vernetzung der Polymerkomponenten fortgesetzt. Hierbei werden die einzelnen Altgummi-Partikel von dem vernetzten Polymer umhüllt, ohne miteinander zu verkleben, so daß ein körniger, rieselfähiger Werkstoff entsteht.The procedure for producing the material according to the invention is preferably as follows:
Shredded waste rubber and the flame-retardant substance are intimately mixed with one another and an aqueous dispersion or emulsion of crosslinkable polymer components, and the mixing process is continued with the application of heat until the polymer components crosslink. Here, the individual waste rubber particles are enveloped by the crosslinked polymer without sticking together, so that a granular, free-flowing material is produced.

Vorzugsweise verwendet man dabei pro 100 Gewichtsteile Altgummipartikel je 20 bis 35 Gewichtsteile der flamm­ hemmenden Substanz und des vernetzenden Polymers.It is preferably used per 100 parts by weight Waste rubber particles each 20 to 35 parts by weight of the flamm inhibitory substance and the crosslinking polymer.

Aus dem erfindungsgemäßen granulatartigen Werkstoff lassen sich schwerentflammbare Produkte, wie Schichten, Bahnen, Blöcke, Formkörper u.ä. erzeugen, die zudem schwingungsdämmende Eigenschaften haben können, indem man - wie die Prinzipdarstellung der Fig. 2 veranschaulicht - die aus dem Altgummikern 2 und der schwerentflammbaren Umhüllung 3 bestehenden Partikel 1 mit einem insbesondere schwerentflammbaren elastomeren Bindemittel 4 vermischt und dies Gemisch - u. U. mit Zusätzen von schwerentflammbaren oder unbrennbaren Füllstoffen - zu den gewünschten Produkten 5 formt.Flame-retardant products such as layers, sheets, blocks, moldings and the like can be made from the granular material according to the invention. generate, which can also have vibration-damping properties by - as the schematic diagram of FIG. 2 illustrates - the particles 1 consisting of the old rubber core 2 and the flame-retardant casing 3 mixed with a particularly flame-retardant elastomeric binder 4 and this mixture - u. U. with additives of flame-retardant or non-flammable fillers - to the desired products 5 forms.

Es hat sich gezeigt, daß die brennbaren Altgummikerne 2 der erfindungsgemäßen Werkstoffpartikel 1 auch im Brandfall von ihrer schwerentflammbaren Umhüllung 3 umschlossen bleiben, so daß sowohl mit dem erfindungsgemäßen granulatartigem Werkstoff als auch mit den aus diesem geformten Produkten die einschlägigen Kriterien der Schwerentflammbarkeit nach DIN 4102 erfüllt werden können.It has been shown that the combustible waste rubber cores 2 of the material particles 1 according to the invention remain enclosed by their flame-retardant coating 3 even in the event of a fire, so that both the granulate-like material according to the invention and the products formed from it meet the relevant criteria of flame retardancy according to DIN 4102 can be.

Damit wird durch die vorliegende Erfindung nicht nur ein hervorragender neuer Werkstoff geschaffen, sondern es wird gleichzeitig ein wirksamer Beitrag zur Lösung des Entsorgungsproblems für gebrauchte Fahrzeugreifen geleistet.Thus, the present invention does not just make one excellent new material created, but it will at the same time an effective contribution to the solution of the Disposal problems for used vehicle tires.

Claims (6)

1. Schwerentflammbarer, aus zerkleinertem Altgummi gebildeter granulatartiger Werkstoff, dadurch gekennzeichnet, daß die einzelnen Werkstoff-Partikel (1) jeweils einen Altgummikern (2) aufweisen, der mit einer schwerentflammbaren Umhüllung (3) versehen ist, die aus einer Mischung aus einem vernetzenden Polymer und einer flammhemmenden Substanz gebildet ist.1. Flame-retardant, granulated material made from shredded waste rubber, characterized in that the individual material particles ( 1 ) each have a waste rubber core ( 2 ) which is provided with a flame-retardant covering ( 3 ) made from a mixture of a crosslinking polymer and a flame retardant substance is formed. 2. Werkstoff nach Anspruch 1, dadurch gekennzeichnet, daß das vernetzende Polymer ein Kautschuk ist.2. Material according to claim 1, characterized in that the crosslinking polymer is a rubber. 3. Werkstoff nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die flammhemmende Substanz Magnesiumhydroxid oder Aluminiumhydroxid ist.3. Material according to claim 1 or 2, characterized in that the flame retardant substance magnesium hydroxide or Is aluminum hydroxide. 4. Verfahren zur Herstellung eines schwerentflammbaren Werkstoffs nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der zerkleinerte Altgummi mit einer flammhemmenden Substanz und einer wäßrigen Dispersion oder Emulsion aus vernetzbaren Polymerkomponenten gemischt und der Mischvorgang unter Wärmezufuhr bis zur Vernetzung des Polymers fortgesetzt wird, wobei das Polymer die einzelnen Altgummi-Partikel umhüllt, ohne sie miteinander zu verkleben. 4. Process for making a flame retardant Material according to one of claims 1 to 3, characterized characterized in that the shredded waste rubber with a flame retardant substance and an aqueous dispersion or Emulsion of crosslinkable polymer components mixed and the mixing process with supply of heat until the crosslinking of the Polymer continues, the polymer being the individual Waste rubber particles are encased without clinging to each other glue.   5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß 100 Gewichtsteile Altgummi-Partikel mit je 20-35 Gewichts­ teilen der flammhemmenden Substanz und des Polymers vermischt werden.5. The method according to claim 4, characterized in that 100th Parts by weight of waste rubber particles, each with 20-35 weight share the flame retardant substance and the polymer be mixed. 6. Verwendung eines schwerentflammbaren Werkstoffs gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Partikel (1) mit einem insbesondere schwerentflammbaren elastomeren Bindemittel (4) vermischt und mit diesem zu schwerentflammbaren - insbesondere schwingungsdämmenden - Schichten, Bahnen, Blöcken, Formkörpern o. ä. (5) geformt werden.6. Use of a flame-retardant material according to one of claims 1 to 3, characterized in that the particles ( 1 ) mixed with a particularly flame-resistant elastomeric binder ( 4 ) and with this to flame-retardant - especially vibration-damping - layers, sheets, blocks, moldings o . Ä. ( 5 ) are formed.
DE1996131251 1996-08-02 1996-08-02 Low-flammability granular material made from scrap tyre rubber granules to construct e.g. vibration dampers or conveyor belts Withdrawn DE19631251A1 (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872320A2 (en) * 1997-04-17 1998-10-21 TEC MAC S.r.L. Method and system for making a solid particle agglomerate
WO2001072892A1 (en) * 2000-03-29 2001-10-04 John Graham Bryant Attenuation material
DE10251818A1 (en) * 2002-11-04 2004-05-19 Mülsener Recycling- und Handelsgesellschaft mbH Coated rubber particles
EP1520871A1 (en) * 2003-10-02 2005-04-06 Hans-Joachim, Weitzel GmbH & Co. KG Granulate and process for the preparation thereof
DE102008000367A1 (en) 2008-02-19 2009-08-20 Evonik Degussa Gmbh Process for the preparation of coated rubber particles and coated rubber particles
WO2010014024A1 (en) * 2008-07-31 2010-02-04 Instituto Superior Tecnico Process for covering rubber particles with a polymeric film and covered robber granulates obtained by this process
DE102009000178A1 (en) 2009-01-13 2010-07-15 Evonik Degussa Gmbh Process for the preparation of multilayer coated rubber particles and multilayer coated rubber particles
DE102009000180A1 (en) 2009-01-13 2010-07-15 Evonik Degussa Gmbh Process for the preparation of multilayer coated rubber particles and multilayer coated rubber particles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542580A1 (en) * 1991-11-14 1993-05-19 Bridgestone Corporation Flame-retardant rubber tires
US5439735A (en) * 1992-02-04 1995-08-08 Jamison; Danny G. Method for using scrap rubber; scrap synthetic and textile material to create particle board products with desirable thermal and acoustical insulation values

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542580A1 (en) * 1991-11-14 1993-05-19 Bridgestone Corporation Flame-retardant rubber tires
US5439735A (en) * 1992-02-04 1995-08-08 Jamison; Danny G. Method for using scrap rubber; scrap synthetic and textile material to create particle board products with desirable thermal and acoustical insulation values

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872320A2 (en) * 1997-04-17 1998-10-21 TEC MAC S.r.L. Method and system for making a solid particle agglomerate
EP0872320A3 (en) * 1997-04-17 1998-10-28 TEC MAC S.r.L. Method and system for making a solid particle agglomerate
WO2001072892A1 (en) * 2000-03-29 2001-10-04 John Graham Bryant Attenuation material
DE10251818A1 (en) * 2002-11-04 2004-05-19 Mülsener Recycling- und Handelsgesellschaft mbH Coated rubber particles
DE10251818B4 (en) * 2002-11-04 2006-06-08 Mülsener Recycling- und Handelsgesellschaft mbH Loose, free-flowing rubber particles, process for their preparation and their use
EP1416009B2 (en) † 2002-11-04 2017-09-27 MRH - Mülsener Rohstoff- und Handelsgesellschaft mbH Coated rubber particles
EP1520871A1 (en) * 2003-10-02 2005-04-06 Hans-Joachim, Weitzel GmbH & Co. KG Granulate and process for the preparation thereof
DE102008000367A1 (en) 2008-02-19 2009-08-20 Evonik Degussa Gmbh Process for the preparation of coated rubber particles and coated rubber particles
WO2010014024A1 (en) * 2008-07-31 2010-02-04 Instituto Superior Tecnico Process for covering rubber particles with a polymeric film and covered robber granulates obtained by this process
DE102009000178A1 (en) 2009-01-13 2010-07-15 Evonik Degussa Gmbh Process for the preparation of multilayer coated rubber particles and multilayer coated rubber particles
DE102009000180A1 (en) 2009-01-13 2010-07-15 Evonik Degussa Gmbh Process for the preparation of multilayer coated rubber particles and multilayer coated rubber particles
WO2010081632A1 (en) 2009-01-13 2010-07-22 Evonik Degussa Gmbh Method for the production of multilayer-coated rubber particles, and multilayer-coated rubber particles

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