+++MSB-M25B
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.
MSB-M25B
Microcellular Foam, Based on High Performance Polyester Polyurethane
This high performance polyester microcellular foam system is one of a family of polymer systems developed by Northstar Polymers for demanding work environments. Urethane foams molded with this system exhibit high tear strength, excellent oil resistance, and outstanding abrasion resistance. They also meet the requirements of 21 CFR 177.1680, FDA direct dry food contact. When the packing factor exceeds 1, an integral skin will develop with properties approaching those of the cast elastomer. For long-term use in constant aqueous environments, consider a system from our polyether or hybrid product families.
Typical Physical Properties
Physical Property ASTM # Typical Value Durometer Hardness: D 2240 60 A Free Rise Density: 19.7 lbs./ ft³ Packing Density: 25 lbs./ ft³ Packing Factor: 1.27 Cell Size 99% are less than 0.5 mm Bashore Rebound D 2632 19%
Component Properties
Prepolymer (A) Curing Agent (B) Product Code: MNA-014 SBA-027 Specific Gravity: 1.218 1.151 Equivalent Weight: 144.5 273.9 %NCO 29.0 % n/a
Mixing Ratio:
Part-A :Part-B Weight Ratio: 1.000 :1.890 Volume Ratio: 1.000 :2.000
Stoichiometry NCO/OH = 1.000/1.000
NCO Index: 1.000
Processing Temperature:
Part-A: Ambient Part-B: 140 °F Mold/Substrate: 110 °F Post Cure Oven: 180 °F (If needed)
Cure Pattern:
Mixing time 20 seconds minimum by hand batch Pot life (pour within) 60 seconds Demolding time 3 Hours with mold temperature 110 °F Complete Cure Cycle: 48 hours at room temperature or 8 hours at 180 °F
Processing Instructions/Guide for Microcellular Foams
Northstar Polymers, LLC
3444 Dight Avenue South
Minneapolis, MN 55406
Tel: 612.721.2911
E-Mail: info@northstarpolymers.com