|
ASTM
D 1418 Designation: ACM
ASTM
D 2000, SAE J200 Type / Class: DF, DH
STANDARD
COLOR: Black
TRADE
NAME:
• HyTemp™ (Zeon Chemicals, L.P.)
RELATIVE
COST: Medium
GENERAL
TEMPERATURE RANGE: 0° to +350° F
Polyacrylate
is a copolymer (ethyl
acrylate, see Figure 44)
which offers good resistance to petroleum fuels and oils.
The auto industry uses polyacrylate O-rings as seals
in automatic transmissions and power steering designs.
Resistant to flex
cracking, polyacrylate also resists damage from
oxygen, sunlight, and ozone (due
to main chain saturation).
Use
of a butyl acrylate instead of an ethyl acrylate
rubber can greatly improve low
temperature flexibility. Changing the R group
from C1 (methyl) to C8 (octyl) can shift the brittle
point by as much as 60° C. Though it is
marginally more resistant to hot air than nitrile,
polyacrylate falls short in strength and compression
set resistance, as well as in resistance to water and low
temperatures.
ACM
PERFORMS WELL IN:
• Automatic transmission
fluid
• Hot oils
• Type A power
steering fluid
ACM
DOES NOT PERFORM WELL IN:
• Alcohol
• Alkalis
• Brake fluids
• Glycols
• Hydrocarbons (aromatic,
chlorinated)
MATERIAL
PROFILES MAIN PAGE
|
