Rubber Compounding Materials
Vulcanization Materials
Activators


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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


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-420
Zinc oxide
Harwick Standard Distribution Corporation
ï

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

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


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.


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-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


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.


Desical
80% calcium oxide in a naphthenic oil binder system
Harwick Standard Distribution Corporation
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.


Stearic acid F-2500
Vegetable based stearic acid
Harwick Standard Distribution Corporation
ï

Non-toxic off-white powder, faint odor; titre - minimum 50C, iodine number 10 maximum; acid number - 195 minimum.

Vegetable based grade of stearic acid used to activate rubber and latex as a dispersing agent, lubricant stabilizer and processing aid





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.


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.


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


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.


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


Stan-Mag Mini Beads
Medium light calcined, high activity magnesium oxide in a paraffinic oil binder system
Harwick Standard Distribution Corporation
ï

Sp.gr. 1.80; small bead form; 65% activity.

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.


Mastermix Lime 2182 Paste-70
70% lime
Harwick Standard Distribution Corporation
ï

Sp. gr. 1.97

Dispersed form of Calcium Oxide for use in natural and synthetic rubbers.


Mastermix Calcium Oxide 6119 Paste-80
80% Calcium Oxide in a DIDP binder
Harwick Standard Distribution Corporation
ï

Sp. gr. 2.27

Dispersed form of Calcium Oxide for use in natural and synthetic rubbers.


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.





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