Page 194 - Handbook of Surface Improvement and Modification

11.2 Additives used 189

11.2 ADDITIVES USED

Polytetrafluoroethylene

GENERAL INFORMATION
Name: polytetrafluoroethylene CAS #: 9002-84-0 EC #: 204-126-9; 618-337-2
PHYSICAL PROPERTIES
State: solid, powder Odor: none Color: white
o
o
Melting point, C: 320-330 Decomposition temperature, C: 470
3
3
Refractive index: 1.35 Bulk density, kg/m : 500 Density, kg/m : 2,100-2,500
Static coefficients of friction: 0.06-0.07 (Bowden-Leben Machin) Particle size, μm, 5
HEALTH & SAFETY
o
Flash point, C: not applicable Rat oral LD50, mg/kg: 1250->5,000
Carcinogenic: IARC-3: not classified as carcinogenic to human
ECOLOGICAL PROPERTIES
Aquatic toxicity, Green algae, 96-h, LC50: 248
Partition coefficient, logK : 1.21
ow
USE & PERFORMANCE
Outstanding properties: Improves wear resistance, non-stick properties, and reduces coefficient of
friction.
Recommended for polymers: PA, polyacetal, polyester, polycarbonate, TPE
Recommended for products: Used as an additive to plastics and elastomers. It is also used as a dry
lubricant or an additive in paints and printing inks. It offers superior handling and dispersing per-
formance.
Concentrations used, wt%: 0.1-5