Rubber Compounding Materials
Vulcanization Materials
Activators
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Tradename
Composition
Supplier
ò
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Properties
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Function
& Compounding
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Mastermix MgO H 5901 Slab-40
40% high activity magnesium oxide in an FKM (genuine Viton) binder.
Harwick Standardï |
Sp. gr. 2.07.
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A pre-dispersed form of high activity magnesium oxide typically used as an acid acceptor in the curing of FKM compounds.
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Stan-Mag 112
Magnesium oxide
Harwick Standardï |
Sp.gr 3.22;surface area- 35 m2/g;powder
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Low activity,low surafce area magnesium oxide
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CR-3
Zinc oxide
Harwick Standardï |
High purity French process , white powder, sp.gr 5.6;large particle size,low surface area ; also available with surface treatment CR-30
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For natural and synthetic rubbers and latices as cure activator and/or vulcanizer; add directly to rubber
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Zinc Stearate Line
Zinc stearate
Harwick Standardï |
White powder or prill; Melt pt. 120°C;available in high bulk or densified grades including USP and wettable
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Mutiple functions in elastomeric compounds including lubricant,acid scavenger, viscosity modifier or cure activator.
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CR-42
Zinc oxide
Harwick Standardï |
High purity French process, white powder,sp.gr 5.6; small particle size and high surface area available with surface treatment (CR-420)
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For natural and synthetic rubbers and latices as cure activator where high reactivity and high purity are required.
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CR-4
Zinc oxide
Harwick Standardï |
High purity French process ,white powder, sp.gr. 5.6; medium particle size and medium surface area; available with surface treatment (CR-40)
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For natural and synthetic rubbers and latices as cure activator and/or vulcanizer; add directly to rubber.
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Stan-Mag 1326 HR
A proprietary blend of zinc and magnesium oxides.
Harwick Standardï |
Sp.gr. 3.17; powder
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Component blend vulcanization system for CR polymers
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Stan-Mag AG
Magnesium oxide
Harwick Standardï |
Sp.gr. 3.22; surface area- 140 m2g;powder
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A high activity, high surface area magnesium oxide for stabilizing chlorinated polymers- CR,CSM,and CPE
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Stan-Mag MLW
Lightly calcined magnesium oxide
Harwick Standardï |
Sp.gr. 3.22; surface area- 115m2/g; 98% passes 325 mesh
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Medium-high activity and surface area grade used as an activator, acid acceptor and scorch protector for halogenated polymers CR, CSM and CPE
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Stearic Acid F-2000
Stearic acid
Harwick Standardï |
Non-toxic off-white powder, faint odor; titre - minimum 52°C, iodine number 20 maximum; acid number - 195 minimum.
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Rubber grade lower cost grade of stearic acid used to activate rubber and latex, as a dispersing agent, lubricant, stabilizer, and processing aid.
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Stearic Acid F-1500
Stearic acid
Harwick Standardï |
Non-toxic white powder; faint odor; titer, 58-62°C; iodine number, 6 max.; acid number,
200-207; sap number 201-208.
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Rubber activator; dispersing agent; lubricant; stabilizer; processing aid; latex activator.
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Stearic Acid F-300
Stearic acid
Harwick Standardï |
Stearic acid; non-toxic white powder; color (Lovibond), 1.5Y/0.2R; titer, 58-61°C; iodine number 1 max.; acid number 200-206.
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Rubber activator; dispersing agent; lubricant; stabilizer; processing aid; latex activator.
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Natro-Cel TATM-A
72% Triallyl Trimelliate on silica powder
Harwick Standardï |
Sp.gr. 1.15;Dustless powder
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Excellent activator for cured EPDM and CPE.
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Natro-Cel 35-A
72% trimethyl propane trimethacrylate on silica powder
Harwick Standardï |
Sp.gr. 1.23; dustless powder
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Co-agent for peroxide cured elastomers
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Stan-Mag DS2
Magnesium oxide
Harwick Standardï |
Sp.gr. 3.22;surface area- 165 m2g; powder
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A high activity ,high surface area magnesium oxide for use as an acid acceptor in chlorinated polymers CR,CSM and CPE
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Desical
80% calcium oxide in a naphthenic oil binder system
Harwick Standardï |
Sp.gr. 2.10; liquid
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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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PolyBound 498 Zinc Oxide
85% ZnO in a proprietary binder
Harwick Standardï |
Sp.gr. 3.25; crumb
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Polymer bound powder form of zinc oxide; dust free form; incorporates rapidly.
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CR-4USP-2
Zinc oxide
Harwick Standardï |
High purity, French process USP Grade sp.gr. 5.6
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For natural and synthetic rubbers and latices as cure activator and/or vulcanizer; add directly to rubber
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CR-40
Zinc oxide- treated
Harwick Standardï |
High purity French process, white powder, sp.gr.5.6; medium particle size and medium surface area, surface treated with propionic acid
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For natural and synthetic rubbers and latices as cure activator and/or vulcanizer; add directly to rubber; surface treatment provides easier, faster incorporation.
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Stan-Mag Mini Beads
Medium light calcined, high activity magnesium oxide in a paraffinic oil binder system
Harwick Standardï |
Sp.gr. 1.80; small bead form; 65% activity.
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Pre-wet form which is non-dusty, free flowing and protected from the deleterious affects of humidity; use for rapid dispersion in halogenated polymers as an acid acceptor, scorch protector and curative.
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