Material Description. This specification covers the chemical and physical requirements of the prepolymer component of a two part polyurethane foam. This prepolymer contains soy based, renewable content. This prepolymer must be padded with nitrogen to prevent any oxidation with air.

The acoustical foam system is comprised of a 16:1 mixture (by volume) of a polymeric methylene diphenyl diisocyante (MDI) prepolymer, 9986409, and a water/amine curative, 9986410. The mixture of 9986409 and 9986410 is identified as 9986411. 

Symbols. Not applicable. 

Applicability. This material is one component of a two component foam typically used for acoustic baffles.