TECHNICAL DATA SHEET
SP-1045
DESCRIPTION
SP-1045 Resin is a heat reactive octylphenolformaldehyde resin which contains methylol groups. It
was specifically designed for the cure of IsobutyleneIsoprene (Butyl) rubber by the resin cure system*. The
octyl group also makes SP-1045 Resin compatible with
elastomers, and can yield cements offering a wide range
of properties. In addition, the methylol groups can be
used as functional sites for a variety of reactions.
SPECIFICATIONS
Property Min. Max.
Melting Point, Capillary, (°F) 140 150
Softening Point, B&R, (°C) 80 95
Methylol Content, (%) 8 11
Color, Gardner, 64% in Toluene 1 6
Test Methods Available Upon Request
TYPICAL PHYSICAL PROPERTIES
Solubility Aromatic; aliphatic; ketones; higher
alcohols; and naphthas.
Specific Gravity 1.04
Physical Form Flake or Pastille
PACKAGING AND STORAGE INFORMATION
The standard packaging for SP-1045 Resin is multi-wall
paper bags at 25 kilograms (55.1 pounds) net weight.
Best results will be noted when this product is stored in a
cool, dry place and used within one year of manufacture.
CURING BUTYL RUBBER
SP-1045 Resin, used in combination with halogen and
zinc donors, yields butyl vulcanizates with outstanding
resistance to high heat and compression set. In addition,
these vulcanizates are non-blooming, non-staining and
have high modulus values.
NM00860 Rev3 (4/07)
FORMULA FOR CURING BUTYL RUBBER
Following is a rudimentary test formulation which
demonstrates the cure of butyl rubber by the resin cure
system. The resin should be added on a 2-roll mill or in
the last pass through a mixer to prevent premature cure.
EXXON1 Butyl 268 95 Parts
Neoprene W2 5 Parts
HAF Carbon Black 50 Parts
Zinc Oxide 5 Parts
Castor Oil 5 Parts
SP-1045 Resin 10 Parts
APPLICATIONS
Resin cured butyl rubber, because of its versatility and
inherent ozone resistance, has been employed in many
areas including tire curing bladders, conveyor belts,
gaskets, and heat resistant packings.
*United States Patent No. 2,701,895 and others to
Uniroyal, Inc.