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Master Bond adhesives

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Covestro DESMODUR®MD1578 + BAYTEC® D21 + BAYTEC® XL AL905 (Catalyst SD11-2) 75A 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 AL905
 1.13 g/ccBAYTEC® D21
 1.14 g/ccDESMODUR® MD1578
 1.20 g/cc
Viscosity 30 cPBAYTEC® XL AL905
 1100 cPBAYTEC® D21
 1500 cPDESMODUR® MD1578
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 75DIN 53505
 70
@Temperature 80.0 °C
DIN 53505
 79
@Temperature -5.00 °C
DIN 53505
Tensile Strength at Break 48.0 MPaDIN 53504
Tensile Stress at Strain 1.40 MPa
@Strain 10 %
DIN 53504
Elongation at Break 480 %DIN 53504
100% Modulus 0.00400 GPa
@Strain 100 %
DIN 53504
200% Modulus 0.00550 GPa
@Strain 200 %
DIN 53504
300% Modulus 0.00800 GPa
@Strain 300 %
DIN 53504
Resilience 60[%]; DIN 53512
Tear Strength 183 pliwith nick; ISO 34-1
 399 pliwithout nick; ISO 34-1
Abrasion 45[mm3]; ISO 4649
Compression Set 21 %
@Temperature 70.0 °C,
Time 79200 sec
ISO 815-1
 
Processing PropertiesOriginal ValueComments
Processing Temperature 45.0 °CBAYTEC® XL AL905
 60.0 °CBAYTEC® D21
 80.0 °CDESMODUR® MD1578
Mold Temperature 110 °C
Pot Life 1.50 min
 
Descriptive Properties
AppearancesolidDESMODUR® MD1578
 solidBAYTEC® D21
 solidBAYTEC® XL AL905
Content0.3SD11-2 % / total (by weight), (catalyst at the head)
 100Parts by weight of prepolymer
 50Parts by weight of BAYTEC® D21
 6Parts by weight of BAYTEC® XL AL905
 7.6-8%NCO

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PCOVEST0410 / 202193

Rulon Bearings

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