MPP-A47A
MPP-A47A
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.
Copy right reserved by Northstar Polymers, LLC 2000 - 2007. Northstar Polymer prohibits duplication of the contents of this web site for the purposes of public display and/or using on another web site without a written authorization by Northstar Polymers, LLC.
MPP-A47A
Data Sheet
MPP-A47A is one of our room-temperature-cure liquid castable polyurethane systems. This ether-base polyurethane system is used in applications such as mold-making, prototyping, production of cast parts, potting, tool-making, and many other applications. MPP-A47A is designed for an easy operation for industrial applications without special casting or heating equipment. The mixing ratio between part-A (MPN-023) and part-B (PBA-058) is 1:3 by volume. Its low viscosity also makes it easy to achieve replicating the details of the mold/original with a fine resolution. Urethane elastomer parts made of this system exhibit:
Fine resolution of mold details
Good resiliency and elongation
Good cut/tear resistance for its class
Good performance in wet environments
Easy-to-use room-temperature-curable
Small shrinkage factor
The suitable applications of MPP-A47A include stamps/patterns and concrete molds designed to transfer a decorative image to wet surfaces. Its property of small shrinkage rate provides users with a tight dimensional stability when a replication is made. It is also suitable for many other custom applications where flexibility and strength of the parts are required.
Typical Physical Properties
|
Physical Property
|
ASTM # |
Typical Value |
|
Durometer Hardness: |
D 2240 |
47 A |
|
Tensile Strength (psi): |
D 412 |
500 |
|
Ultimate Elongation (%): |
D 412 |
520 |
|
Tear Resistance (pli) |
|
|
|
Die C: |
D 624 |
90 |
|
Split: |
D 624 |
14 |
|
Natural Color: |
|
Opaque, off white |
Typical Processing Conditions
|
Prepolymer: |
MPN-023 |
|
Curing Agent: |
PBA-058 |
|
Catalyst: |
Included |
|
Prepolymer Temperature (ºF): |
Room Temperature** |
|
Curing Agent Temperature (ºF): |
Room Temperature** |
|
Mold Temperature (ºF): |
Room Temperature** |
|
Pot Life*(minutes): |
10 - 15 |
|
De-mold Time*** at 77ºF (hours): |
6 - 8 |
|
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 part can be demolded at de-molding time. 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.
Typical Mixing Ratio
Prepolymer (A) Curing Agent (B)
Code Number: MPN-023 PBA-058
Specific Gravity: 1.173 1.023
Equivalent Weight: 226 579
Stoichiometry: 1.00 1.02
NCO/OH Index: 0.98 1.00
Weight Pph: 27.6 72.4
Weight Ratio: 1.000 2.617
Weight Ratio: 0.382 1.000
Volume Pph: 25.0 75.0
Volume Ratio: 1.000 3.001
Volume Ratio: 0.333 1.000
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.