Rubber Compounding Materials
Vulcanization Materials
Activators


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Function & Compounding


Stearic Acid R Prill
stearic acid
HB Chemical
ï

Prilled rubber grade stearic acid.

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


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.


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.


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.


Stan-Mag MLW
Lightly calcined magnesium oxide
HEXPOL Compounding
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


Mastermix MgO H 5901 Slab-40
40% high activity magnesium oxide in an FKM (genuine Viton) binder.
HEXPOL Compounding
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.


Mastermix CalMag 5903 Slab-45
45% active 2:1 blend of calcium hydroxide and magnesium oxide in an FKM (genuine Viton) binder.
HEXPOL Compounding
ï

Sp. gr. 1.94.

A convenient dispersed blend of activators for FKM compounds.


Mastermix HMT 4060 Paste-60
60% HMT in a DOP binder
HEXPOL Compounding
ï

Sp. gr. 1.15

Dispersed form of HMT - Hexamethylenetetramine 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.





DLP 1035 SR-350E-30K
30% SR-350E on a carrier
HEXPOL Compounding
ï

Sp. gr. 1.82

Dry Liquid Powder - free flowing version of the SR-350E liquid - TMPTMA - Trimethylolpropane Trimethacrylate. Easier to handle, weigh and incorporate into NR and SR compounds.


PolyBound 498 Zinc Oxide
85% ZnO in a proprietary binder
HEXPOL Compounding
ï

Sp.gr. 3.25; crumb

Polymer bound powder form of zinc oxide; dust free form; incorporates rapidly.


PolyBound 367 Calcium Oxide-85
85% Calcium Oxide encapsulated in a proprietary binder
HEXPOL Compounding
ï

Sp. gr. 2.48

Polymer bound powder form of calcium oxide; dust free form incorporates rapidly during mixing.


Stan-Mag DS2
Magnesium oxide
HEXPOL Compounding
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


PolyBound 463 Mag Oxide-70
70% magnesium oxide encapsulated in proprietary binder
HEXPOL Compounding
ï

Sp. gr. 1.83; crumb

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


Redimix 4167 HMT-70
70% HMT in a DOP binder
HEXPOL Compounding
ï

Sp. gr. 1.20

Dispersed form of HMT - Hexamethylenetetramine for use in natural and synthetic rubbers.


Mastermix Hexa 4165 Slab-70
70% Hexa in an EPR binder
HEXPOL Compounding
ï

Sp. gr. 1.15

Dispersed form of HMT - Hexamethylenetetramine for use in natural and synthetic rubbers.


Mastermix MgO H 2229 Slab-40
40% high activity magnesium oxide in an FKM binder.
HEXPOL Compounding
ï

Sp. gr. 2.05

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


DLP 1039 SR-350-56H
56% SR-350 on a carrier
HEXPOL Compounding
ï

Dry Liquid Powder - free flowing version of the SR-350 liquid - TMPTMA - Trimethylolpropane Trimethacrylate. Easier to handle, weigh and incorporate into NR and SR compounds.


Mastermix Hexa 4924 Paste-60
60% Hexa in a DOP binder
HEXPOL Compounding
ï

Sp. gr. 1.30

Dispersed form of HMT - Hexamethylenetetramine for use in natural and synthetic rubbers.





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