MSA-031 is a polyester based MDI prepolymer used in a high-performance casting elastomer system by Northstar Polymers; it may also be used in many other custom polyurethane formulations. MSA-031 makes Shore Durometer 60D hardness non-foam elastomer when cured with 1,4 butanediol, and it can also be compounded with many other types of curing agents. MSA-031 is extended by polyester polyol, which has a good affinity with many polar raw materials. The MDI functionality of MSA-031 is close to 2.0, which helps compounding polyester based quasi systems with good tensile/elongation properties.Information provided by Northstar Polymers |