Rubber Compounding Materials
Vulcanization Materials
Activators


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TEA-DLC-A
72% triethanolamine on silica powder
Natrochem
ï

Sp.gr. 1.30; dustless powder; shipped: bag.

NR, SBR activator; neutralizes clay acidity; add directly; incorporates rapidly.


TEA DLD
Triethanolamine (99%) on silica binder.
Akron Dispersions, Inc.
ï

Sp.gr. 1.414; light gray to tan, dustless, free-flowing powder.

Activator for NR and SBR; neutralizes acidity of clay.


TATM DLD
Triallyl trimellitate on silica binder.
Akron Dispersions, Inc.
ï

Sp.gr. 1.415; off white, dustless, free-flowing powder.

Activator for peroxide vulcanization.


Suprmix Triethanolamine 85
Triethanolamine - silicate blend
The HallStar Co.
ï

Sp.gr. 1.277; light buff, non-dusting powder; pressure sensitive; shipped: fiber drums.

NR, SBR, latex activator; dispersing agent; use in Hi-Sil, Silene and Zeolite loaded stocks; use 3-6% on filler content.


Struktol Zinc Stearate
Manufactured from a high quality technical grade stearic acid in a tightly controlled production operation that guarantees product uniformity.
Struktol Company of America
ï

Appearance: Three forms are available bead, pastille, and powder; zinc stearate bead is a free-flowing spray-dried microbead; the pastille is lens-shaped and approximately 1/8 inch in diameter; the bead and pastille are relatively new product forms in the industry; they have the major advantage of being essentially dust-free during handling, in contrast to powder forms; in all other aspects, the properties are equivalent to the standard stearates being used in the plastic and rubber industries.

Serves primarily as a lubricant, but also as a densifying agent and a partitioning agent; used extensively in color concentrates as a dispersion aid; used to improve processing of the styrenics and polyesters, and to a lesser extent with the olefins; In rubber applications, it functions as an elastomer processing aid and release agent.


Struktol Zinc Laurate
Zinc salt of lauric acid
Struktol Company of America
ï

Specific gravity: 1.08; drop point: 125-135C; appearance: white pastille or course powder

Used as an activator for thiazoles, thiurams and dithicarbomates by supplying fatty acid and soluble zinc; dosage: 1-5 phr; Call for FDA status.


Struktol Zimag 29/43A
Free-flowing granulate consisting of: 29% zinc oxide, 43% magnesium oxide and 28% wetting and dispersing agent.
Struktol Company of America
ï

Specific gravity: 2.11, bulk density: 800 (kg/m3), ash content: 70%, appearance: gray powder.

A cross-linking agent consisting of a 2:3 ratio of zinc oxide to magnesium oxide for chloroprene compounds to reduce scorch; dosage: 4-8 phr.


Struktol ZEH-DL
Zinc 2-ethylhexanoate coated on silica powder
Struktol Company of America
ï

Specific gravity: 1.46, zinc content: 16.6% max, silica content: 33.3%, appearance: light powder

Rubber soluble activator for natural rubber compounds when used in place of stearic acid improves stress relaxation and primary creep of NR compounds; especially effective with soluble EU-systems; concentrations - 1.5 - 4.5 Phr.


Struktol ZEH
Zinc 2-ethylhexanoate
Struktol Company of America
ï

Specific gravity: 1.20, zinc content: 24% max, viscosity at 25C (mPa-s): 7000 max, appearance: high viscosity liquid

A rubber soluble zinc soap used as an activator for natural rubber; used instead of stearic acid and reduces stress relaxation and primary creep of NR-vulcanizates, especially in combination with soluble EV-systems; dosage: 1-3 phr.


Struktol WB 900A
Magnesium oxide dispersion
Struktol Company of America
ï

Specific gravity: 2.09, magnesium oxide: 75+/-1, appearance: tan bead

Struktol metal oxide preparations may be used in rubber compounds where the dispersion of untreated metal oxides gives rise to problems; they reduce sticking to the rotor blades and mill rolls; WB 900A provides protection against humidity and carbon dioxide.; reduces the scorch risk of polychloroprene compounds.





Struktol WB 700A
Zinc oxide 91%; dispersing agent 9%
Struktol Company of America
ï

Specific gravity: 3.85; bulk density: 1,200; ash content: 91%; appearance: non-dusting powder

A non-dusting powder and is preferably used, where high amounts of dispersing agents are undesirable; shorter mixing time can be achieved compared to powered zinc oxide due to faster incorporation and the temperature of the compound is increased only slightly, which is an advantage in scorchy stocks; can be used in small dosages due to the uniform dispersion of the zinc oxide; formation of agglomerates, variations of the physical values and brittleness of the vulcanized rubber are reduced; physical properties of the vulcanizates are improved, especially after aging.


Struktol Activator 73LM
Mixture of zinc salts of aliphatic and aromatic carboxylic acids
Struktol Company of America
ï

Dropping point: 94-106C; specific gravity: 1.15; zinc content: 12% max; appearance: antique white pastilles

Effective activator for sulfur vulcanization, used at 2 - 5 phr, designed for lower temperature mixes compared to Activator 73A.


Struktol Activator 73A
Mixture of zinc salts of aliphatic and aromatic carboxylic acids
Struktol Company of America
ï

Dropping Point: 105-117C, Specific Gravity: 1.24, Zinc Content: 20% max, Appearance: antique white pastilles

Improvements include: prolonged reversion time, higher modulus, less heat build-up under dynamic load, and reduced compression set at elevated temperatures.


Stearic acid, SA 590
Vegetable based stearic acid, rubber grade
Sovereign Chemical Company
ï

Flake, sp.gr. 0.84

see SA-590


Stearic Acid R Prill
stearic acid
HB Chemical
ï

Prilled rubber grade stearic acid.

Rubber activator, dispersing agent, lubricant, stabilizer, processing aid.


Stearic Acid Quimic 1070
Fatty acid
Dynasol
ï

Triple pressed, white flake

Activator, plasticizer, softener


Stearic Acid Quimic 1012
Fatty Acid
Dynasol
ï

Rubber grade sp. gr, 0.84, white flake

Rubber activator, plasticizer, softener


Stearic Acid F-300
Stearic acid
Harwick Standard Distribution Corporation
ï

Stearic acid; non-toxic white powder; color (Lovibond), 1.5Y/0.2R; titer, 58-61C; iodine number 1 max.; acid number 200-206.

Rubber activator; dispersing agent; lubricant; stabilizer; processing aid; latex activator.


Stearic acid F-2500
Vegetable based stearic acid
Harwick Standard Distribution Corporation
ï

Non-toxic off-white powder, faint odor; titre - minimum 50C, iodine number 10 maximum; acid number - 195 minimum.

Vegetable based grade of stearic acid used to activate rubber and latex as a dispersing agent, lubricant stabilizer and processing aid


Stearic Acid F-2000
Stearic acid
Harwick Standard Distribution Corporation
ï

Non-toxic off-white powder, faint odor; titre - minimum 52C, iodine number 20 maximum; acid number - 195 minimum.

Rubber grade lower cost grade of stearic acid used to activate rubber and latex as a dispersing agent, lubricant stabilizer and processing aid.





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Click companies below for more information about Activators

Suppliers listed
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Natrochem

Akron Dispersions, Inc.

The HallStar Co.

Struktol Company of America

Sovereign Chemical Company

HB Chemical

Dynasol

Harwick Standard Distribution Corporation

     

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