MPP-A80B
MPP-D80B
Northstar Polymers, LLC
3444 Dight Avenue So.
Minneapolis, MN 55406
Tel: 612.721.2911
Fax: 612.721.1009
E-Mail:
Northstar Polymers, LLC is a member of Polyurethane Manufacturers Association.
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MPP-D80B
Data Sheet
MPP-D80B has a high load-bearing property at hardness 80 D Durometer. This material has a relatively slow curing pattern. Whereas many polyurethane formulations of this hardness cure very fast thus are very difficult to hand-batch or to cast a larger part. MPP-D80B gives a long pot-life for ease of process. The combination of there properties makes this material ideal for prototyping molding to imitate hard plastic parts.
The material will cure at room temperature. However, processing at a slightly elevated temperature (110 - 120 ºF) will allow faster demolding time to achieve a better production rate. This material can be processed at either room temperature or using heat.
Note: Heat distortion temperature of this material is relatively low and it is not suitable for application which require load bearing property at an elevated temperature range.
Typical Physical Properties
Physical Property
Typical Value
Durometer Hardness:
80D
Tensile Strength
8,000 psi
Ultimate Elongation (%):
5
Flexural Strength
10,000 psi
Flexural Modulus
300,000 psi
Heat Distortion (@264 psi load)
140 ºF
Typical Processing Conditions
Prepolymer:
MPN-023
Curing Agent:
PND-011
Catalyst:
Included
Prepolymer Temperature (ºF):
Room Temperature**
Curing Agent Temperature (ºF):
Room Temperature**
Mold Temperature (ºF):
Room Temperature**
Pot Life*(minutes):
15 - 18
De-mold Time*** at 77ºF (hours):
8 - 9
Complete Cure Cycle*** at 77 °F (days):
2 - 3
* Defined as: a 300 gram sample is too thick to pour.
** Between 70 ºF and 90 ºF. Higher temperature results faster curing pattern
*** The use of catalyst or higher mold temperature will increase the rate of cure. Mold may needed to be heated to 100 - 120 ºF for casting a very thin layer and/or using a heat-absorbing material for mold or inserts.
Prepolymer (A) Curing Agent (B)
Code Number: MPN-023 PND-011
Volume Ratio: 2.000 1.000
Weight Ratio: 1.000 0.454
Specific Gravity: 1.173 1.065
Equivalent Weight: 226 106
Stoichiometry: 1.00 0.97
NCO/OH Index: 1.03 1.00
The actual mixing ratio at the operation may need to be adjusted based on the actual stoichiometric ratio calculation. For machine mixing, the mixing ratio calibration is recommended before the new batch of raw material is used.
Northstar Polymers, LLC
3444 Dight Avenue South
Minneapolis, MN 55406
Tel: 612.721.2911
Fax: 612.721.1009
E-Mail: info@northstarpolymers.com
Notice: All of the statements, recommendations, suggestions, and data concerning the subject material are based on our laboratory results, and although we believe the same to be reliable, we expressly do not represent, warrant, or guarantee the accuracy, completeness, or reliability of same, or the material or the results to be obtained from the use thereof, neither do we warrant that any such use, either alone or in combination with other materials, shall be free of the rightful claim of any third party by way of INFRINGEMENT or the like, and NORTHSTAR POLYMERS DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY and FITNESS FOR A PARTICULAR PURPOSE.