Rubber Compounding Materials
Vulcanization Materials
Activators


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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.


Natro-Cel TATM-A
72% Triallyl Trimelliate on silica powder
Harwick Standard Distribution Corporation
ï

Sp.gr. 1.15;Dustless powder

Excellent activator for cured EPDM and CPE.


CR-3
Zinc oxide
Harwick Standard Distribution Corporation
ï

High purity French process , white powder, sp.gr 5.6;large particle size,low surface area ; also available with surface treatment CR-30

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


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

Sp.gr. 1.23; dustless powder

Co-agent for peroxide cured elastomers


Mastermix CalMag 5903 Slab-45
45% active 2:1 blend of calcium hydroxide and magnesium oxide in an FKM (genuine Viton) binder.
Harwick Standard Distribution Corporation
ï

Sp. gr. 1.94.

A convenient dispersed blend of activators for FKM compounds.


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


Stan- Mag 112
Magnesium oxide
Harwick Standard Distribution Corporation
ï

Sp.gr 3.22;surface area- 35 m2/g;powder

Low activity,low surafce area magnesium oxide


Zinc Stearate Line
Zinc stearate
Harwick Standard Distribution Corporation
ï

Sp. gr- 1.09; white powder; Melt pt. 120C;available in high bulk or densified grades including USP and wettable

Mutiple functions in elastomeric compounds including lubricant,acid scavenger, viscosity modifier or cure activator.


CR-4
Zinc oxide
Harwick Standard Distribution Corporation
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.


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.





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


Stan-Mag DS2
Magnesium oxide
Harwick Standard Distribution Corporation
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


PolyBound 498 Zinc Oxide
85% ZnO in a proprietary binder
Harwick Standard Distribution Corporation
ï

Sp.gr. 3.25; crumb

Polymer bound powder form of zinc oxide; dust free form; incorporates rapidly.


Stan-Mag MLW
Lightly calcined magnesium oxide
Harwick Standard Distribution Corporation
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 AG
Magnesium oxide
Harwick Standard Distribution Corporation
ï

Sp.gr. 3.22; surface area- 140 m2g;powder

A high activity, high surface area magnesium oxide for stabilizing chlorinated polymers- CR,CSM,and CPE


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-1000
Stearic acid
Harwick Standard Distribution Corporation
ï

Stearic acid, 70-75%; non-toxic white powder; color (Lovibond), 10.0Y/15R; titer, 58-62C; iodine number, 6 max.; acid number,200-207; sap number, 201-208.

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


Stearic Acid F-1500
Stearic acid
Harwick Standard Distribution Corporation
ï

Non-toxic white powder; faint odor; titer, 58-62C; iodine number, 15 max.; acid number, 200-207; sap number 201-208.

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


CR-42
Zinc oxide
Harwick Standard Distribution Corporation
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.


CR-4G
Zinc oxide
Harwick Standard Distribution Corporation
ï

High purity French process, white granule/pellet sp.gr 5.6; medium particle size, medium surface

For natural and synthetic rubbers and latices as cure activator and/or vulcanizer; add directly to rubber; pellet grade provides less dust





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The HallStar Co.

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