• Heat Cured Rubber (HCR)

    • Heat Cured Rubber (HCR) is a silicone elastomer formed of straight chains with very high molecular weight
    • Also known as High Temperature Vulcanizing silicone rubber (HTV)

  • Chemical composition and properties

    Subject

    • Made from reactive silicone gums (straight chains)
    • Has very high molecular weight macromolecules containing various reactive groups
    • The most frequently used gums are either partly phenylated or perfluorinated vinylated gums

    Additives

    • Add fumed or precipitated silicas with high specific surface area to improve mechanical properties
    • Can also add heat stabilizers and various other additives such as plasticizers or anti-structuring agents

    Curing methods

    • Cross-linking occurs using organic peroxides in polycondensation systems, or
    • Platinum catalysts in polyaddition systems

    Proper temperature

    • From -50°C to + 300°C
    • Exceptional mechanical strength

    Aging resistance

    • Photo-oxidative stability
    • Chemically stable
    • Photo-oxidative stability

    Color

    • A wealth of colorings are possible
    • By using a sufficiently fine silica filler it is even possible to make transparent articles for use in food and paramedical applications
  • Rightchem

    Peroxide cure - HCR

     

    Elkem Silbione HCRU 4440

    · Hardness 48 Sh A / · Elongation>450% / · Tear strength>25 kNm-1 / · Biocompatibility · Paramedical application

     

    Elkem Silbione HCRU 4470

    · Hardness 70 Sh A / · Elongation>330% / · Tear strength>30 kNm-1 / · Biocompatibility · Paramedical application

     

    Wacker Cenusil R170

    · Hardness 70 Sh A / · Elongation>290% / · Tear strength>18 kNm-1 / · Paramedical application

     

     

  • Rightchem

    Platinum catalyzed cure - HCR

     

    Elkem Silbione HCRA 4130 A|B

    · Hardness 29 Sh A / · Tensile Strength 10.3 MPa / · Elongation>1100% / · Tear strength>38 kNm-1 / · Artificial skin

     

    Elkem Silbione HCRA 4170 A|B

    · Hardness 70 Sh A / · Tensile Strength 9 MPa / · Elongation>550% / · Tear strength>39 kNm-1 / · Catheters

     

    Elkem Silbione HCRA 4530 A|B

    · Hardness 30 Sh A / · Tensile Strength 11.7 MPa / · Elongation 1000% / · Tear strength 43.8 kN·m-1 / · Catheter balloon · Needle-free

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