Rubber Compounding Materials
Vulcanization Materials
Activators


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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.


Akrochem E-9347 Urea OT
Oil treated urea
Akrochem Corp.
ï

Sp.gr. 1.30; free flowing white powder, mp 129-134°C; slight water solubility.

Blow promoter for nitrogen blowing agents; also a cure activator for thiazole accelerators in CR, IIR, NBR, NR and SBR.


Polyethylene Glycol EF/Enviropeg Line
Polyethylene glycol
The Dow Chemical Company
ï

Line includes Solids - Sp gr 1.22; white powder or flake PEG-E-3350, E-4000, E-6000,E-8000 and E-20,000; Melt pt.55-61C Semi-solids - Sp.gr. 1.13; white E-1450 and E-2000; melt point 44-48 C Liquids - Sp.gr. 1.13 E-200 and E-400

Activator used in conjunction with high surface area silicas and internal lubricant in elastomeric compounds.


Akrochem PEG 3350
Polyethylene glycol
Akrochem Corp.
ï

Powder/Granules; sp.gr. 1.15; melt point 130°F; soluble in water

As an activator for silica/mineral filled compounds; aso as a process aid/lubricant; typical dosages 1.5 to 3.0 phr; higher levels are used to add polarity to mircrowave-cured EPDMs.


Polyethylene Glycol EF/Enviropeg Line
Polyethylene glycol
Harwick Standard Distribution Corporation
ï

Line includes Solids - Sp gr 1.22; white powder or flake PEG-E-3350, E-4000, E-6000,E-8000 and E-20,000; Melt pt.55-61C Semi-solids - Sp.gr. 1.13; white E-1450 and E-2000; melt point 44-48 C Liquids - Sp.gr. 1.13 E-200 and E-400

Activator used in conjunction with high surface area silicas and internal lubricant in elastomeric compounds.


Akrochem 9930 Zinc Oxide Transparent
Precipitated basic zinc carbonate
Akrochem Corp.
ï

White powder; sp. gr. 3.5; 99% through 200 mesh.

Accelerator, activator of extremely fine particle size; particularly useful for transparent and translucent rubber articles (NR and SR); acid acceptor in CR adhesive where transparency is required; very good dispersion characteristics.


Akrochem Zinc Oxide 35
Precipitated zinc oxide
Akrochem Corp.
ï

White to light yellow powder; sp.gr. 5.6; surface are 35 m2/gram.

Effective activator of extremely fine particle size; use in NR, SR and latex applications; high activity permits 20-30% reduction in loading compared to regular zinc oxide; useful in transparent and translucent rubber articles; crosslinking agent for CR and XNBR.


Akrochem Oleic Acid
Primarily cis-9-octadecenoic acid (oleic)
Akrochem Corp.
ï

Oyster white liquid; sp.gr. 0.90

Utilized as an activator, plasticizer in NR and SR where color or clarity are not critical; typical loading 2-10 phr.


Poly-Dispersion ERD-90
Red Lead in an EPR binder
Rhein Chemie Corporation
ï

Sp.gr. 4.57; Red Lead, 90%; very fine dispersion in elastomeric slab form, scored, dusted and separated with PE.

To produce low water absorption polychloroprene compounds and EPDM wire; provides processing and handling safety, excellent dispersion, uniform cures curing activator for CR, IIR, CSM.


Akroform Pb3O4-90/EPR/P
Red Lead in EPR
Akrochem Corp.
ï

90% active.

Easy and safer handling; used primarily as ECO acid acceptor.





Kenmix
Red lead/N 5/1
Flow Polymers LLC
ï

Sp.gr. 3.82

Activator in paste form in Kenflex N.


Kenmix
Red lead/N 9/1
Flow Polymers LLC
ï

Sp.gr. 4.93

Activator in paste form in Kenflex N.


Kenmix
Red lead/P 5/1
Flow Polymers LLC
ï

Sp.gr. 3.82

Activator in paste form in Kenflex P.


Kenmix
Red lead/P 9/1
Flow Polymers LLC
ï

Sp.gr. 4.93

Activator in paste form in Kenflex P.


Kenmix
Red lead/Sundex 790 9/1
Flow Polymers LLC
ï

Sp.gr. 4.81

Activator in paste form in Sundex 790.


Kenmix
Red lead/Sunpar 2280 9/1
Flow Polymers LLC
ï

Sp.gr. 4.7

Activator in paste form in Sunpar 2280.


Drimix
Ridacto 75 Powder
Flow Polymers LLC
ï

Sp.gr. 1.22

Free flowing powder form of Ridacto, an accelerator activator


Stearic Acid
Rubber grade stearic acid
The HallStar Co.
ï

Sp.gr. 0.84' white flakes, mild fat odor; non-toxic; mp, 70°C; idine no, 9.5, titre 52°C, acid number 197-209.

For NR, SRs (except IIR), latexes; activator; plasticizer; softener; gives acid-type activation; improves processing; aids filler and pigment dispersion; add directly.


SA-590
Rubber grade, vegetable based stearic acid
Sovereign Chemical Company
ï

Flake, sp. gr. 0.84

Vegetable based grade of stearic acid designed for use in rubber compounding as an activator; also used in esters for various lubricant applications as metal working and textile lubricants, and in the production soaps, emulsifiers, and metallic stearates.


Drimix
Silacto 75 Powder
Flow Polymers LLC
ï

Sp.gr. 1.25

Free flowing powder form of Silacto, an activator for silica containing stocks.





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Suppliers listed
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Struktol Company of America

Akrochem Corp.

The Dow Chemical Company

Harwick Standard Distribution Corporation

Rhein Chemie Corporation

Flow Polymers LLC

The HallStar Co.

Sovereign Chemical Company

     

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