Rubber Compounding Materials
Vulcanization Materials
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Mastermix Zinc Oxide 4849 Slab-90
90% Zinc Oxide in an EPR binder
HEXPOL Compounding
ï

Sp. gr. 3.73

Dispersed form of medium surface area zinc oxide for use in natural and synthetic rubbers.


Mastermix Zinc Oxide 5118 Slab-90
90% Zinc Oxide in an EPR binder
HEXPOL Compounding
ï

Sp. gr. 3.75

Dispersed form of a high surface area zinc oxide for use in natural and synthetic rubbers.


Mastermix Zinc Oxide 4625 Paste-55
55% Zinc Oxide in napthenic oil
HEXPOL Compounding
ï

Sp. gr. 3.06

Dispersed form of medium surface area zinc oxide for use in natural and synthetic rubbers.


Mastermix Zinc Oxide 5594 Cube-80
80% Zinc Oxide in a NBR binder
HEXPOL Compounding
ï

Sp. gr. 2.89

Dispersed form of medium surface area zinc oxide for use in Nitrile (NBR) rubber.


Starmag CX-50
Magnesium oxide
HB Chemical
ï

Surface area 42 m2/g; iodine absorption 50 mg/g; bulk density 0.51 g/ml, fine white powder; recommended for Viton, Fluorel; med. activity because of its superior dispersion.

Excellent processing and superior dispensability.


Starmag U
Magnesium oxide
HB Chemical
ï

Surface area 145 m2/g; iodine absorption 160 mg/g; bulk density 0.43 g/ml; fine white powder

Highest activity for use in Neoprene G, W, TW types; acts as an acid acceptor in rubber and styrenic resins, CR contact adhesives; recommended for SMC thickener.


Starmag 150
Magnesium oxide
HB Chemical
ï

Surface area 135 m2/g; iodine absorption 155 mg./g; bulk density 0.35 g/ml; fine white powder

High activity for use with Neoprene and other chlorinated polymers; acts as an acid acceptor and high temperature aging improver.


Starmag CX-150
Magnesium oxide
HB Chemical
ï

Surface area 135 m2/g; iodine absorption 145 mg/g; bulk density 0.35 g/ml; fine white powder

Excellent processing and dispersion; recommended for fluoroelastomer compounding; high activity; known for superior dispersability.


Fluorocal H; Fluorocal O
Calcium hydroxide; calcium oxide
HB Chemical
ï

Tightly controlled particle size distribution for calcium hydroxide H-20, H-30; uniform, consistent particle size calcium oxide O-15.

Intended for FKM compounds where superior dispersion and consistency is required; several grades and packages available; allows single pass FKM mixing.


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





Stan-Mag Products
Magnesium oxide
Harwick Standard Distribution Corporation
ï

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


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

Sp. gr. 1.83; crumb

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


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

Sp. gr. 1.25; crumb

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


Mixland + Zinc oxide Masterbatch
Zinc oxide -80 % active in a proprietary Mixland + binder
Harwick Standard Distribution Corporation
ï

Pellets- 140 micron filtered

Dispersion for easy incorporation;see also CR Zinc oxides


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


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.


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.


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.


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.





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