Rubber Compounding Materials
Vulcanization Materials
Activators


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Composition
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Function & Compounding


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.


Calcium Oxide HP
High purity calcium oxide
The HallStar Co.
ï

A high purity, very dry, conveniently packaged calcium oxide for rubber compounding.

Used in fluoroelastomer compounding; also used as a desiccant in compounding for continuous cures.


Calcium Hydroxide HP
High purity calcium hydroxide
The HallStar Co.
ï

Sp.gr. 2.08; Odorless, dry powder; conveniently packaged.

For NR, SRs, fluoroelastomers, latexes; speeds up cure; prevents product porosity; add directly.


Stan-Mag Products
Magnesium oxide
Harwick Standard
ï

A variety of of magnesium oxide based products in powder, bead, or bar form


CR-40
Zinc oxide- treated
Harwick Standard
ï

High purity French process, white powder, sp.gr.5.6; medium particle size and medium surface area, surface treated with propionic acid

For natural and synthetic rubbers and latices as cure activator and/or vulcanizer; add directly to rubber; surface treatment provides easier, faster incorporation.


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

Sp.gr. 3.17; powder

Component blend vulcanization system for CR polymers


Stan-Mag MLW
Lightly calcined magnesium oxide
Harwick Standard
ï

Sp.gr. 3.22; surface area- 115m2/g; 98% passes 325 mesh

Medium-high activity and surface area grade used as an activator, acid acceptor and scorch protector for halogenated polymers CR, CSM and CPE


Stan-Mag MBZ
Co-dispersion of Magnesia and Zinc
Harwick Standard
ï

Free flowing powder, 2.0 sp. gr., 65% active

Proprietary blend of zinc and magnesium oxides for polychloroprene vulcanization. Designed for use at 3 - 5 phr in polychloroprene to replace all magnesium and zinc oxide in a formulation.


PolyBound 466 Urea-75
75% urea encapsulated in proprietary binder
Harwick Standard
ï

Sp. gr. 1.25; crumb

Polymer bound powder form of urea; easy to handle form; dust free form incorporates rapidly during mixing.


CR-4
Zinc oxide
Harwick Standard
ï

High purity French process ,white powder, sp.gr. 5.6; medium particle size and medium surface area; available with surface treatment (CR-40)

For natural and synthetic rubbers and latices as cure activator and/or vulcanizer; add directly to rubber.





Mastermix MgO H 5901 Slab-40
40% high activity magnesium oxide in an FKM (genuine Viton) binder.
Harwick Standard
ï

Sp. gr. 2.07.

A pre-dispersed form of high activity magnesium oxide typically used as an acid acceptor in the curing of FKM compounds.


Natro-Cel 35-A
72% trimethyl propane trimethacrylate on silica powder
Harwick Standard
ï

Sp.gr. 1.23; dustless powder

Co-agent for peroxide cured elastomers


PolyBound 463 Mag Oxide-70
70% magnesium oxide encapsulated in proprietary binder
Harwick Standard
ï

Sp. gr. 1.83; crumb

Polymer bound powder form of MgO easy to handle; dust free form incorporates rapidly during mixing.


CR-4USP-2
Zinc oxide
Harwick Standard
ï

High purity, French process USP Grade sp.gr. 5.6

For natural and synthetic rubbers and latices as cure activator and/or vulcanizer; add directly to rubber


Desical P
80% calcium oxide in a naphthenic oil binder system
Harwick Standard
ï

Sp.gr. 2.24; paste

A premium paste dispersion for rapid mixing in rubber compounds; a cure activator; eliminates porosity due to moisture related blistering; used in low pressure or pressureless continuous curing of rubber extrusion products such as automotive weatherseals and pipe insulation.


Mastermix MgO H 2229 Slab-40
40% high activity magnesium oxide in an FKM binder.
Harwick Standard
ï

Sp. gr. 2.05

Dispersion of high activity magnesium oxide for use in general-purpose bisphenol cured FKM compounds.


Stan-Mag Bar
65% MgO in a proprietary binder
Harwick Standard
ï

Sp.gr. 1.80;bar form

Medium-high activity grade MgO used as an activator, acid acceptor and scorch protector for halogenated polymers such as CR and CSM


Stan-Mag DS2
Magnesium oxide
Harwick Standard
ï

Sp.gr. 3.22;surface area- 165 m2g; powder

A high activity ,high surface area magnesium oxide for use as an acid acceptor in chlorinated polymers CR,CSM and CPE


CR-42
Zinc oxide
Harwick Standard
ï

High purity French process, white powder,sp.gr 5.6; small particle size and high surface area available with surface treatment (CR-420)

For natural and synthetic rubbers and latices as cure activator where high reactivity and high purity are required.


Desical
80% calcium oxide in a naphthenic oil binder system
Harwick Standard
ï

Sp.gr. 2.10; liquid

Dispersion provides rapid incorporation into liquid systems, such as vinyl plastisols, and eliminates porosity due to moisture related blistering; used for pressureless and fusion processes for plastics.





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Harwick Standard

     

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