Rubber Compounding Materials
Vulcanization Materials
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CR-4USP-2
Zinc oxide
Harwick Standard Distribution Corporation
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


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


CR-30
Zinc oxide
Harwick Standard Distribution Corporation
ï

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

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


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-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.


CR-40
Zinc oxide- treated
Harwick Standard Distribution Corporation
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 Products
Magnesium oxide
Harwick Standard Distribution Corporation
ï

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


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.


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.


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





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.


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


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

Sp. gr. 2.05

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


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.


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-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.


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


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





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