Rubber Compounding Materials
Vulcanization Materials
Activators


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Function & Compounding


Mastermix Zinco 4910 Bar-90
90% Zinc Oxide
HEXPOL Compounding
ï

Sp. gr. 3.57

Dispersed form of medium surface area zinc oxide for use in natural and synthetic rubbers.


Zic-Stick 'SG'
90% zinc oxide
Rhein Chemie Corporation
ï

Sp. gr. approx. 3.66; very fine particle size

Activator for NR's and SR's, vulcanizer for polychloroprene and other halogenated elastomers, superior activity.


Mastermix Zinc Oxide 5118 Slab-90
90% Zinc Oxide in an EPR binder
HEXPOL Compounding
ï

Sp. gr. 3.75

Dispersed form of a high surface area zinc oxide for use in natural and synthetic rubbers.


Mastermix Zinc Oxide 4849 Slab-90
90% Zinc Oxide in an EPR binder
HEXPOL Compounding
ï

Sp. gr. 3.73

Dispersed form of medium surface area zinc oxide for use in natural and synthetic rubbers.


Val-Mix Cal-90DN
905 calcium oxide in napthenic binder
Valley Rubber Mixing, Inc.
ï

Light gray, free flowing, finely pulverized dustless powder.

Dessicant; lw cost moisture scavenger to prevent porosity in continuous, no pressure curing; high resistance to post-vulcanization formation of white specks; dustless powder improves environmental safety; available in pre-weighed, heat sealed, mixercompatible polybags.


Litharge 33 Sublimed
99.0% PbO red lead content 0.04%, Free lead content
Flow Polymers LLC
ï

Sp.gr. 9.5.

Used in rubber compounding similarly to litharge 28 where a smaller particle size is desired; a uniformly high purity material with a light tan color.


Stan-Mag 1326 HR
A proprietary blend of zinc and magnesium oxides.
Harwick Standard Distribution Corporation
ï

Sp.gr. 3.17; powder

Component blend vulcanization system for CR polymers


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.


Zinc Oxide Dispersion - Taber brand
American and French zinc oxide and SBR
Taber Inc.
ï

A polymer masterbatch of 80% American or French zinc oxide and SBR.

Improve dispersion and processing.


Bostex 422
Aqueous dispersion of zinc oxide
Akron Dispersions, Inc.
ï

Off white liquid; total solids 59.5-63.5%; pH - 9.0-11.0.

A 60% aqueous dispersion of a conventional activator for accelerator systems used in natural and synthetic latices.





Kenmix
Barium carbonate/P 80/20
Flow Polymers LLC
ï

Sp.gr. 2.57

Activator in paste form in Kenflex P.


Zinc Oxide Transparent
Basic zinc carbonate
Lanxess Corporation
ï

Sp. gr, 3.5; white to light yellowish powder; zinc content as zinc oxide approx. 72%; shipped: bag.

A very highly disperse accelerator activator without pigmenting properties; excellent in the manufacture of transparent rubber goods and adhesives; acts as an activator in latex applications


Kenmix
C-5 paste
Flow Polymers LLC
ï

Activator for polysulfide compounds.


Akroform PbOMC-90/EPR/P
Calcined litharge in EPR
Akrochem Corp.
ï

90% active MB in pellets form.

NR and SR cure activator/acid acceptor in EPR.


Hallco CAOP
Calcium hydroxide/DOP dispersion
The HallStar Co.
ï

Sp.gr. 1.05; (80% calcium hydroxide) finely dispersed in DOP; free flowing powder, dustless.

Recommended for mill and internal mixing; offers better dispersion and safety.


Fluorocal H; Fluorocal O
Calcium hydroxide; calcium oxide
HB Chemical
ï

Tightly controlled particle size distribution for calcium hydroxide H-20, H-30; uniform, consistent particle size calcium oxide O-15.

Intended for FKM compounds where superior dispersion and consistency is required; several grades and packages available; allows single pass FKM mixing.


Parasec R
Calcium oxide (75% active)
Parabor Industria E Comercio de Produtos Quimicos LTDA
ï

Creamy-gray powder; sp.gr. 2.20.

Dessicant in compounding for continuous cures; prevents porosity in rubber vulcanizates; acceleration activator.


Westco CAO-80
Calcium oxide disp.
Western Reserve Chemical
ï

Sp.gr. 2.1; a fine dispersion of CAO in a high viscosity processing oil.

Activator, desiccant, absorbs moisture and prevents porosity.


Westco CAO-90
Calcium oxide dispersion
Western Reserve Chemical
ï

Sp.gr. 2.44; 86% min. calcium oxide in a high viscosity process oil

Activator; dessicant, absorbs moisture and prevents porosity in rubber.


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





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Click companies below for more information about Activators

Suppliers listed
on this page

HEXPOL Compounding

Rhein Chemie Corporation

Valley Rubber Mixing, Inc.

Flow Polymers LLC

Harwick Standard Distribution Corporation

Taber Inc.

Akron Dispersions, Inc.

Lanxess Corporation

Akrochem Corp.

The HallStar Co.

HB Chemical

Parabor Industria E Comercio de Produtos Quimicos LTDA

Western Reserve Chemical

     

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