Normac NR-987 is a two component polyether based urethane casting system yielding a cured hardness of 72 Shore D.

PREPOLYMER PROPERTIES

Prepolymer:                                TDI - Ether

Appearance @ 27^OC (80^OF):     Clear liquid

Viscosity @ 100^OC (212^OF):      650 cps

PROCESSING INFORMATION

Curative pph (ratio):                  40 (100 parts "A" to 40 parts "B" by weight)

Stoichiometry:                             95

Prepolymer Temperature:         27^OC (80^OF)

Curative Temperature:              27^OC (80^OF)

Working Pot Life:                      20-30 minutes

ELASTOMER PROPERTIES

Shore Hardness:                         72 + 5 shore D

100% Modulus:                          800 psi (ASTM D412)

300% Modulus:                          1500 psi (ASTM D412)

Tensile Strength:                        5000 psi (ASTM D412)

Elongation:                                  200% (ASTM D412)

Tear Strength (D-470 pli):         131 (ASTM D470)

Bashore Resilience:                    30% (ASTM D2632)

Taber Abrasion:                         85.0 (ASTM D4060)

(mg loss per 1000 cycles)

H-18 wheel on 1000g load

Rev.1