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Ensinger PEI

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DSM Biomedical CarboSil® 40 90A Biocompatible Silicone Polycarbonate Urethane  (discontinued **)
Categories: Polymer; Thermoplastic; Elastomer, TPE; Polyurethane, TP; Silicone Polyurethane, Polycarbonate Based; Silicone, Thermoplastic

Material Notes: Combines the biocompatibility and biostability of conventional silicone elastomers with the processability and toughness of thermoplastic urethane elastomers. Noncytotoxic and nonhemolytic. Low-Energy Silicone Surface; Outstanding Oxidative Stability; Hydrophobic; High Tensile Strength; Optically Clear.

PurSil™ silicone-polyetherurethane and CarboSil™ silicone-polycarbonateurethane are true thermoplastic copolymers containing silicone in the soft segment. These high-strength thermoplastic elastomers are prepared through a multi-step bulk synthesis where polydimethylsiloxane (PSX) is incorporated into the polymer soft segment with polytetramethyleneoxide (PTMO) (PurSil) or an aliphatic, hydroxyl-terminated polycarbonate (CarboSil). The hard segment consists of an aromatic diisocyanate, MDI, with a low molecular weight glycol chain extender. The copolymer chains are then terminated with silicone (or other) Surface-Modifying End Groups™. Aliphatic (AL) versions of these materials, with a hard segment synthesized from an aliphatic diisocyanate, are also available.

PurSil and CarboSil can be melt fabricated by conventional extrusion, injection molding, or compression molding techniques. Rod, pellet, and tubing extruded from these materials displays an excellent surface finish and low gel content. In addition, these materials are heat-sealable, readily blended with fillers, and easily post-formed.

Information provided by the manufacturer, Polymer Technology Group.

Key Words: The Polymer Technology Group; Polyurethane; TPUR
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Density 1.14 g/ccASTM D792
Linear Mold Shrinkage 0.012 cm/cm4.0" disk; ASTM D955
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 90
Tensile Strength, Ultimate 29.6 MPaASTM D1708
Tensile Stress at Strain 7.40 MPa
@Strain 50 %
ASTM D1708
Elongation at Break 530 %ASTM D1708
Flexural Yield Strength 1.90 MPa5% deflection; ASTM D-790
Flexural Modulus, 1% Secant 0.0395 GPaASTM D790
Tear Strength 470 pliDie "C"; ASTM D624
Taber Abrasion, mg/1000 Cycles 144H-18 wheel; ASTM D-1044
Compression Set 33 %
@Temperature 25.0 °C,
Time 79200 sec
ASTM D395
 
Electrical PropertiesOriginal ValueComments
Dielectric Constant 4.5
@Frequency 60 Hz
ASTM D150
Dielectric Strength 19.3 kV/mmASTM D149
 
Thermal PropertiesOriginal ValueComments
CTE, linear 181.2 µm/m-°C
@Temperature 20.0 °C
ASTM E831
Vicat Softening Point 67.0 °CASTM D1525
 
Optical PropertiesOriginal ValueComments
Transmission, Visible 90 %Manufacturer notes 'clear' but doesn't quantify
 
Processing PropertiesOriginal ValueComments
Processing Temperature 185 - 200 °CExtrusion
Drying Temperature 82.0 - 104 °C
Dry Time 4 - 6 hourto moisture < 0.01%

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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Overview of materials for Thermoplastic Elastomer, Melt-Processible Rubber

PBIOC2 / 27167

Polyurethane

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