Rubber Compounding Materials
Vulcanization Materials
Activators


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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.


Mastermix Zinc Oxide 5169 Slab-80
80% Zinc Oxide in an EPDM binder
HEXPOL Compounding
ï

Sp. gr. 2.68

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


Mastermix Zinco 4910 Bar-90
90% Zinc Oxide
HEXPOL Compounding
ï

Sp. gr. 3.57

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


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 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.


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.


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.


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.


Stearic Acid R Prill
stearic acid
HB Chemical
ï

Prilled rubber grade stearic acid.

Rubber activator, dispersing agent, lubricant, stabilizer, processing aid.





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


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.


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.


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.


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.


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.


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


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 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


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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