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Ensinger PEI

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Lubrizol Advanced Materials PEARLBOND® 521 Linear Thermoplastic Polyurethane
Categories: Polymer; Thermoplastic; Polyurethane, TP

Material Notes: Pearlbond™ 521 is a linear, polycaprolactone-copolyester polyurethane, supplied in form of white spherical granules with a very high crystallization rate and a very high thermoplasticity level.

Application: Pearlbond™ 521 can be added to formulations of REACTIVE POLYURETHANE HOT-MELTS (HMPUR), in order to improve the crystallisation speed.

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Physical PropertiesOriginal ValueComments
Density 1.19 g/ccISO 2781
Viscosity 760000 cP
@Temperature 130 °C
Melt; ISO 1133
Melt Flow 30 - 60 g/10 min
@Load 2.16 kg,
Temperature 170 °C
ISO 1133
 
Chemical PropertiesOriginal ValueComments
Total Base Number <= 3.0mg KOH/g; MQSA 47 A
 
Thermal PropertiesOriginal ValueComments
Melting Point 63.0 - 67.0 °CMQSA 70 A
 
Processing PropertiesOriginal ValueComments
Moisture Content <= 0.15 %MQSA 44
 
Descriptive Properties
Crystallization rate (minutes)9 - 11MQSA 12 B
ThermoplasticityVery highMQSA 68 A

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