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Covestro DESMODUR® MD1665 + BAYTEC® XL B Polyurethane, MDI-Ester
Categories: Polymer; Thermoset; Polyurethane, TS

Material Notes:

Information provided by Covestro

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.01 g/ccBAYTEC® XL B
 1.18 g/ccDESMODUR® MD1665
 1.21 g/cc
Viscosity 30 cPBAYTEC® XL B
 1700 cPDESMODUR® MD1665
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 85DIN 53505
 80
@Temperature 80.0 °C
DIN 53505
 90
@Temperature -5.00 °C
DIN 53505
Tensile Strength at Break 43.0 MPaDIN 53504
Tensile Stress at Strain 2.10 MPa
@Strain 10 %
DIN 53504
Elongation at Break 600 %DIN 53504
100% Modulus 0.00610 GPa
@Strain 100 %
DIN 53504
200% Modulus 0.00880 GPa
@Strain 200 %
DIN 53504
300% Modulus 0.0127 GPa
@Strain 300 %
DIN 53504
Resilience 38[%]; DIN 53512
Tear Strength 428 pliwith nick; ISO 34-1
 628 pliwithout nick; ISO 34-1
Abrasion 25[mm3]; ISO 4649
Compression Set 30 %
@Temperature 70.0 °C,
Time 79200 sec
ISO 815-1
 
Processing PropertiesOriginal ValueComments
Processing Temperature 45.0 °CBAYTEC® XL B
 80.0 °CDESMODUR® MD1665
Mold Temperature 110 °C
Pot Life 45.0 min
 
Descriptive Properties
AppearancesolidDESMODUR® MD1665
 solidBAYTEC® XL B
Content100Parts by weight of prepolymer
 6.5-6.9%NCO
 6.8Parts by weight of BAYTEC® XL B

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PCOVEST0423 / 202206

Specialty Compounds RTP Company

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