+++MPL-R20B
Northstar Polymers, LLC
3444 Dight Avenue So.
Minneapolis, MN 55406
Tel: 612.721.2911
Fax: 612.721.1009
E-Mail: info@northstarpolymers.com
Northstar Polymers, LLC is a member of Polyurethane Manufacturers Association.
Copy right reserved by Northstar Polymers, LLC 2000 - 2007.
MPL-R20B
High Load-Bearing Rigid Structural Foam
This rigid polyurethane foam system is one of a family of polymer systems developed by Northstar Polymers for specific applications. Urethane foams molded with this system exhibit closed cell structure, and its high-density foam structure provides a very good lord bearing capability. The both components are low viscosity liquid and together with its easy mixing ratio of 1: 1 by volume, this material is ideal as a bonding agent structural composite. A user can mix and pour the mixture with common tools without an expensive casting/spray machine. This foam can also be mix/cast by a meter mixing machine. This foam do not use a volatile auxiliary blowing-agent and can be operated in a ambient workplace without being flame/spark-free environment. This combination of features makes MPL-R20B ideal for molded/cast structural parts, cat-in-place structural foam material, structural composites, and many other custom applications.
Physical Properties Typical Value Free Rise Density 20 pounds per cubic foot Hardness (Short Durometer) 45 D Flexural Strength (ASTM D-790) 1094 psi Compressive Strength (ASTM D1621 at 10%) 959 psi Cell Structure Closed Cell (>93%) Natural Color of Cured Foam Dark yellow to Amber
Components:
Mixing Ratio
Part-A Part-B Volume Ratio 1.000 1.000 Weight Ratio 1.000 0.870
Processing Temperature:
Part-A Ambient
Part-B Ambient
Mold/Substrate Ambient (Best to be 100 - 110 ºF (38 -44 ºC))
* The ideal temperature for the mold and substrate is 100 - 110 ºF. However, if you are casting on substrate that are less heat-absorbing, such as plastic, sheet rock, or wood, molding surface can be at the ambient temperature. For all metal molds, the temperature should be between 100 to 110 ºF.
Cure Pattern:
Mixing Time 30 Seconds Pot Life (pour within) 1 Minute Demolding time 50 - 60 minutes Complete Cure Cycle 24 hours at room temperature * The cure pattern can be modified by catalyst level. Please consult Northstar Polymers for change of curing pattern.
* The system cures at room temperature. However, higher temperatures (up to 120 ºF) will yield faster cure time.
* When molding a foam part, do not use silicone based mold release as it could destroy the foam surface.
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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.