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  • Page 1

    Versatility of Polyolefins in

    Waterproofing and Roofing Systems

    Waterproofing applications

    State-of-the-art in polyolefins

    Additives and formulations

    Production technologies

    Proven formulations

    Designing future waterproofing solutions

    Stefan Ultsch Dow Europe GmbH

  • Page 2

    Applications of flexible waterproofing membranes

    Unballasted roofing

    Ballasted/Green roof

    Geomembranes, water liners

    Tunneling

  • Page 3

    Polyolefin-based waterproofing in civil engineering

    Breathable

    pitched roof

    Vapor barriers

    Ballasted or green roof

    Parapet sealants

    Adhered roofing

    Expansion joints

    Pool- and tankliners

    Facade sealants

    Subsoil waterproofing

    Mechanically fixed roofing

    Bitumen

    compatibility and

    modification

  • Page 4

    Simple

    Multipurpose

    Material usage

    Fire resistance

    Unmet needs and development drivers

    Installation Service-Life

    Flexible

    Reliable welding

    Material usage

    Longevity

    Energy saving

    Optimized economics

    Fast product change

    Low scrap, economics

    Existing lines

    ManufacturingDesign

  • Page 5

    Design options for waterproofing membranes

    Coextruded top layer, coating, laminated film...

    Top layer

    Scrim, fabric

    Glasfleece

    Bottom layer compound

    Fleece backing, substrate for adhesion

  • Page 6

    The Dow Polymer Portfolio

    LLDPE

    PP

    RCP

    ICP

    Mo

    du

    lus LDPE

    Mg(OH)2

    Al(OH)3

    CaCO3

    TiO2

    AO

    ...

    -EA

    -MAH

    PBE

    HDPE

    ULDPE

    EPDM

    OBC

    POE

    DOWLEX

    ATTANE

    ENGAGE

    INFUSE

    NORDEL IP

    AMPLIFY

    VERSIFY

    INSPIRE

    PE PPPP

  • Page 7

    Freeport

    AFFINITY

    AFFINITY GA

    INFUSE

    TarragonaAFFINITY

    ENGAGE

    VERSIFY

    PlaquemineENGAGE

    NORDEL Thailand (2011)AFFINITYENGAGE

    Seadrift

    VLDPE

    Dow Elastomers manufacturing sites

  • Page 8

    ethylene-based olefin block-copolymers

    Crystalline hard-blocksInterlinking soft blocks

    Advantages: Flexibility (Modulus 2 to 4 MPa, Shore A = 55 to 70 )

    Temperature resistance (TM = 120 C)

    Filler take up

    Welding......

    * Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

  • Page 9

    INFUSETM Block Copolymers: Heat resistance and Flexibility

    20

    40

    60

    80

    100

    120

    140

    1 10 100Flexural Modulus [MPa]

    DSC Melting Temperature [C]

    INFUSE Block Copolymers

    Random Copolymers

    Heat resistance and flexibility in highly-filled formulations

    Ideal polymer for flexible B+C-formulations

    * Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

  • Page 10

    random ethylene copolymers

    Octene-, Butene- or Propylene side chains

    * Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

    Advantages: Flexibility (Modulus 2 to 100 MPa, Shore A = 55 to 90 )

    Cold temperature impact

    High melt strength ....

    NEW XLT-grades offer significantly improved temperature resistance

    Flexibility and low temperature impact in highly-filled and easy-to-process compounds

  • Page 11

    octene-based linear low-density polyethylene

    Octene-side chains

    * Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

    Major Advantages: Mechanical strength, tear strength

    Excellent chemical resistance

    Stand-alone LLDPE in geomembranes with broadest approvals and listings

    Component for PE-based membrane formulations

    DOWLEX

  • Page 12* Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

    propylene-based elastomers

    Advantages: Flexibility (Modulus 2 to 120 MPa, Shore A = 70 to 90 )

    Outstanding welding...

    Excellent blending with PP and PE: the linking polymer

    Highly flexible, propylene-based TPOs

    Specific grades for building and construction membranes

    isotactic polypropylene backbone

    ethylene blocks

    Plastomes and Elastomers

  • Page 13* Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

    flexible impact Polypropylene

    Advantages: Flexible PP (Modulus 700 to 1000 MPa)

    Heat resistance

    Cold temperature impact

    Excellent blending, alloying with VERSIFY

    isotactic polypropylene backbone

    INSPIRE Performance Polymers

    functional additives

  • Page 14* Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

    polymers with added functionalities

    Compatibilizers to fillers and additives

    scrims and fabrics

    coatings, metal, substrates..

    AMPLIFY, PRIMACOR

    Tailored performance in combination with Dow olefins

    ethylene acrylic acid

    ethylene ethyl acrylate Maleic anhydride

  • Page 15

    Tailored and tight tolerance of DOW polymers

    INSITE-catalyst technology

    State-of-the-art reactor technologies

    No vis-break processes...

    * Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

    Excellent and lasting heat welding

    High degrees of filling

    Easy processing and excellent properties

    Representative

    Molecular Build-up

    DOW Elastomers

    2 43 5 6 7

    0.2

    0.4

    0.6

    0.8

    1.0

    1.2

    no low-molecular

    fraction

    Differential molecular

    weight distributionRepresentative molecular structure

    no oligomers or low

    molecular weight fraction

    Log [Mw]

  • Page 16

    Flame retardants

    Halogen-free flame retardants

    Purity, particle size distribution, surface coating are decisive parameters

    Processing and degradation characteristics are critical

    Dow Elastomer formulations:

    Low melt temperatures allow high production rates with Al(OH)3 Passing stringent norms (ENV 1187 t3) with very flexible membranes

    60

    70

    80

    90

    100

    0 100 200 300 400 500 600

    Aluminum-trihydrate

    Al(OH)3

    Magnesium-hydroxide

    Mg(OH)2

    Temperature [C]

    Wei

    gh

    t lo

    ss [

    %]

  • Page 17

    Stabilizers and longevity

    Phenolics and hindered amines processing and longterm

    Titanium dioxide (TiO2) and carbon black UV-stabilizers and colorants

    Flame retardants and fillers purity affects longevity

    ISO 4892-2 (0.5 W/m) weatherometer testing

    DOW olefins: high stabilizer additions without plate-out or impact on welding

    0

    20

    40

    60

    80

    100

    120

    0 2000 4000 6000 8000 10000 12000 14000

    Customer reference

    Reference with DOW

    DOW standard TPO

    DOW TPO without flame retardant

    Exposure time [h]

    Ret

    ain

    ed b

    reak

    elo

    ng

    atio

    n [

    %]

    EN 12956: no cracks...

  • Page 18

    Reinforcements

    Scrims Fabrics Inserted knits Fleeces Combinations

    Tailored to manufacturing process, application- and norm-requirements.

    Mostly PETP- and glas-fibers. Occaionally PP-fibers.

    Dow formulations

    high adhesion with standard fiber-coatings (no oligomers)

    for all type of reinforcements

  • Page 19

    Formulation component strategy

    LLDPE PP

    RCP

    ICP

    LDPE

    PBE

    ULDPE

    EPDM

    OBC

    POE

    DOWLEX

    ATTANE

    ENGAGE

    INFUSE

    NORDEL

    VERSIFY

    INSPIRE

    Roofing (ballasted and unballasted)

    Geomembranes, water liners

    Tunnel liners

    ..... Expansion joints, flexibility

    EPDM

    PE- or PP-based formulations matching various applications

    * Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

  • Page 20

    Multi-generation development

    Generation 2: highly fire

    resistant, flexible systems

    Formulations for waterproofing and

    membrane applications

    Generation 3: specialty

    elastomer systems

    Generation 1: TPO systems

    European standards

    North American standards

    Unmet needs

  • Page 21

    Compounding

    Co-rotating,

    intermeshing

    Counter-rotating,

    non-intermeshing

    Reciprocating

    co-kneaders

    Dow Elastomers

    Formulation and compounding know-how and for all type systems

    Favorable process conditions and output rates up to 85 % filler levels

    Masterbatch- and pre-compound formulation know-how

  • Page 22

    M M

    Polymer 1

    Polymer 2

    Additive MB

    Fillers

    Flame retardantindividual

    gravimetric

    feeders

    Gear pump

    Flat-slit die

    Calander

    melting filler feed, homogenisation, dispersion homogenisation

    Dow Elastomers: Formulation component strategy

    Formulation- and process-know-how

    High throughput rates, low torque and die pressure

    Mass temperatures below 200 C enable use of ATH flame retardant

    Direct extrusion on co-rotating twin-screw extruders

    Diagram: courtesy of Krauss Maffei Berstorff, Hanover Germany

  • Page 23

    Counter-rotating, intermeshing twin-screws

    Single-screw and counter-rotatin

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