Rubber Compounding Materials
Vulcanization Materials
Activators


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Rhenofit D/A
Highly reactive magnesium oxide
Rhein Chemie Corporation
ï

Sp.gr. 3.60; white powder

A highly reactive magnesium oxide intended specifically for use in the rubber processing industry; improves the processing safety of CR, CSM, CM and CIIR based rubber compounds by increasing the critical temperature of basic accelerators; reduces the susceptibility of rubber compounds to scorching; In acid accelerators, it lowers the necessary activation temperature; in polymers containing halogen, and particularly in CR, it acts as an acid acceptor, thereby improving aging properties; in cold-cured fabric proofing, it serves to neutralize traces of acid; moduli are generally increased by Rhenofit D/A.


Rhenofit CF
Specially treated very fine Ca(OH)2
Rhein Chemie Corporation
ï

Sp.gr. approx. 2.2 white powder

Crosslinking activator for fluoro-elastomers.


Rhenofit 2642
Combination of activating substances based on urea bound to high activity silica
Rhein Chemie Corporation
ï

Sp.gr.. approx. 1.50; white powder, slightly hygroscopic

Accelerator activator for the vulcanization of CO and ECO.


Rhenofit 2120
Active magnesium oxide
Rhein Chemie Corporation
ï

Sp.gr. 3.57; white powder

An active magnesium oxide especially selected for the use in the rubber processing industry; improves the processing safety of rubber compounds based on CR, CSM, CM and CIIR; raises the critical temperature of basic accelerators and thus prevents scorching; In acid accelerators, the activiting temperature of acid accelerators is decreased; in polymers containing chlorine, especially CR, it serves as an acid acceptor and thus improves the aging properties of the vulcanizates; in cold cured rubber coated fabrics, Rhenofit 2120 is used to neutralize acid traces; moduli are generally increased by its addition.


Rhenofit 2060
Magnesium oxide in a binder
Rhein Chemie Corporation
ï

Sp.gr. 3.57; light gray powder

Curing activator and acid acceptor particularly suitable for polychloroprene rubber (CR) and adhesives. a low active magnesium oxide especially selected for the use in the rubber processing industry; improves the processing safety of rubber compounds based on CR, CSM, CM and CIIR; raises the critical temperature of basic accelerators and thus prevents scorching; for acid accelerators the activating temperature is decreased; in polymers containing chlorine, especially CR, it serves as an acidacceptor and thus improves the ageing properties of the vulcanizates; in cold cured rubber coated fabrics, it is used to neutralize acid traces; moduli are generally increased by the addition of Rhenofit 2060.


Rhenofit 1987
Combination of activating substances based on urea
Rhein Chemie Corporation
ï

Sp.gr. approx. 1.5; white powder.

Curing activator and promoter for reinforcing fillers


Rhenofit 1600
Combination of urea derivatives and dispersing agent
Rhein Chemie Corporation
ï

Sp.gr. approx. 1.25; light-colored aqueous paste

Blow promoter and deodorizer as well as vulcanization activator with built-in scorch retarder.


Redimix 4167 HMT-70
70% HMT in a DOP binder
HEXPOL Compounding
ï

Sp. gr. 1.20

Dispersed form of HMT - Hexamethylenetetramine for use in natural and synthetic rubbers.


Red Lead Poly Slab
90% red lead in an EPR binder
Polymerics
ï

Sp.gr. 4.63; Red Lead in a rubber slab form; excellent storage stability.

Activator for NR and SRs; excellent incorporation and dispersion; very easy handling.


Red Lead FlowSperse
90% Red Lead on different carriers
Flow Polymers LLC
ï

Past or elastomeric dispersion.

Prespersion of red lead; vulcanizer for halogenated polymers.





Pristerene 9429
Stearic acid.
M.F. Cachat
ï

Tallow based rubber grade stearic acid; titre, 52-60°C, iodine no. 11 max., acid value 192-210 and saponification value 194-212.


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.


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.


Polydox C-90
90% CaO, oil treated
Polychem Dispersions
ï

Sp.gr. 2.43; calcium oxide, oil treated in a powder form.

Similar to Polydex C-80; is also used as a dessicant in vinyl plastisols


Polydox C-80
80% CaO in a napthenic oil binder
Polychem Dispersions
ï

Sp.gr. 2.07; calcium oxide paste dispersion

An efficient moisture absorber for all commonly used elastomers giving protection from porosity or blistering of rubber products produced in low or high-temperature cure systems.


Poly-Dispersion TRD-90
90% red lead oxide in an EPDM/EVA binder
Rhein Chemie Corporation
ï

Sp.gr. 4.58; orange slabs

Preferably used as an activator in acid resistant compounds. It considerably reduces the swelling of vulcanizates in water; is suitable as an oxidizing agent for the vulcanization of butyl rubber with p-quinone dioxime; can be used to improve the heat resistance in peroxide cured CPE compounds; is not recommended for use in thiadiazole cured CPE; filler in compounds for protective covering, because of the high absorption capacity to x-rays.


Poly-Dispersion T(HRL)D-90
Fine particle size litharge in an EPDM binder
Rhein Chemie Corporation
ï

Sp.gr. 4.75; litharge 90%; very fine dispersion in elastomeric slab form, scored, dusted, and separated with PE.

chlorosulfonated polyethylene stabilizer, add in first step in mixing cycle; provides processing and handling safety, excellent dispersion, uniform cures.


Poly-Dispersion SR-517-50
50% Saret 517 in polymeric binder
Rhein Chemie Corporation
ï

Sp.gr. app. 1.12; encapsulated and protected form.

Crosslinkable; acrylic monomer, used in peroxide vulcanization to provide high hardness; promotes batch to batch cure rate uniformity.


Poly-Dispersion JZFD-90P
88% zinc oxide in a NR binder
Rhein Chemie Corporation
ï

Sp.gr. 3.50; white pellets

Vulcanizing activator for use in natural and synthetic rubber compounds.


Poly-Dispersion GRD-90
90% Red Lead oxide in an ECO binder
Rhein Chemie Corporation
ï

Sp.gr. 5.18; orange slabs

Used as a cure activator in ECO cure systems; the red lead acts as an acid scavenger for the cure system allowing a more rapid cure.





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Rhein Chemie Corporation

HEXPOL Compounding

Polymerics

Flow Polymers LLC

M.F. Cachat

The Dow Chemical Company

Harwick Standard Distribution Corporation

Polychem Dispersions

     

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