Page 120 - Handbook of Adhesion Promoters

7.12 Isocyanates 113

7.12 ISOCYANATES

GENERAL INFORMATION
Name: Nourybond, Desmodur, CAS #: 2422-91-5, 4151-51-3 EC #: 219-351-8, 223-981-9
Vanchem
Common synonym: blocked and nonblocked isocyanates Acronym: PMDI, MDI
Active matter, wt%: 27-51
Composition: 27% triphenylmethane-4,4',4''-triisocyanate in 70% ethyl acetate, impurity: <2.5%
chlorobenzene, <0.1% diphenylmethane-4,4'-diisocyanate, <0.05% phenyl isocyanate; 28%
tris(p-isocyanatophenyl) thiophosphate in 71% ethyl acetate, impurity: <1% chlorobenzene; 20-
30% diphenylmethane diisocyanate, 20-30% polymethylene polyphenylene isocyanate, 60-70%
chlorobenzene, <0.01% phenyl isocyanate
PHYSICAL PROPERTIES
Color: yellow-green or red-brown to dark violet Color, Gardner scale: 2
Solubility (diluents): toluene, aromatic and chlorinated solvents, and acetone
o
Evaporation rate (butyl acetate=1): 0.32 Boiling point, C: 77-132
o
3
Density, at 20 C, kg/m : 1000-1240
o
Kinematic viscosity, at 25 C, cSt: Vapor density: 3.8
o
Melt flow rate, g/10 min at 192 C/2.16 kg: Odor: almond-like, strong
o
o
Vapor pressure at 25 C, kPa: Viscosity at 25 C, mPa s: 3-50000
0.097
HEALTH AND SAFETY
o
Autoignition temp., C: 460 HMIS: fire, health, reactivity: 3, 2, 1
o
Flash point, C: -4 to >100 LD50, dermal rabbit, mg/kg: 10000
3
LD50, oral rat, mg/kg: >2000 OSHA PEL, mg/m : 0.2 MDI NIOSH, ppm: 0.005 MDI
3
NIOSH REL, mg/m : 0.05 MDI
UN/NA class: 1993, 1134 UN risk phrases, R: R20,R52/53
ENVIRONMENTAL IMPACT
EC50, Fathead minnow, 96h, mg/l: 29.1
Partition coefficient, log K : 6.22
oc