WITHOUT HEXA
SP-6700 (P-86)
SP-6700 is a cashew nut oil modifed phenol-formaldehyde resin. It does not contain
hexa and is the base resin that is used in the manufacture of SP-6600. It is compatible
in all proportions in nitrile rubber. SP-6700 is produced for those high temperature
compounding cycles where the early presence of hexa could result in scorching.
In banbury operations, it is often more desirable to add hexa to the stock on the sheet
off mill. The quantity of hexa added is dependent on processing conditions and the
physical properties desired.
SP-6701 (P-49)
SP-6701 is a tall oil modifed phenol-formaldehyde resin. It does not contain hexa
and is the base resin that is used in the manufacture of SP-6601. SP-6601 is used
primarily in SBR stocks where high processing temperatures are encountered.
Due to the high temperature compounding cycles, the early presence of hexa
could result in premature cure or scorch. The hexa should be added with the
accelerators and sulfur as the last step in the mixing cycle.
Reinforcing (Two-Step) Resins
Product
Melting Point
Capillary Method (°F)
Physical Form
Hexa Content (%)
Specifc Gravity
With Hexa
SP-6600 (P-87)
140 - 165
Powder
6.5 - 8.5
1.17
SP-6601 (P-55)
145 - 160
Powder
6.5 - 8.5
1.17
SP-8855 (P-40)
170 - 190
Powder
6.0 - 8.0
1.18
Without Hexa
SP-6700 (P-86)
90 - 100*
Flake
None
1.16
SP-6701 (P-49)
90 - 100*
Flake
None
1.16
* Ball & Ring Method (°C)
© SI Group, 2015