Rubber Compounding Materials
Vulcanization Materials
Activators


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Composition
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Properties

Function & Compounding


Cadmium Oxide FlowSperse
Various percentages of cadmium oxide in different carriers
Flow Polymers LLC
ï

Paste and elastomeric dispersions

Activators for high heat resistant cure systems, prevents porosity in vulcanizates; dessicant.


Calcium Hydroxide

Rhein Chemie Corporation
ï

See also FE(Ca(OH)2)-68, and Elast-O-Sperse RS-1


Calcium Hydroxide HP
High purity calcium hydroxide
The HallStar Co.
ï

Sp.gr. 2.08; Odorless, dry powder; conveniently packaged.

For NR, SRs, fluoroelastomers, latexes; speeds up cure; prevents product porosity; add directly.


Calcium Oxide

Rhein Chemie Corporation
ï

See Rhenogran CaO-80, Rhenofit C, Elast-O-Sperse RS-1, FE(Ca(OH)2)-68, FE (CaO)-75 and Elast-O-Cal S-80, Elast-O-Cal 80, Elast-O-Cal 80HT, Elast-O-Cal 80FDA,Elast-O-Cal C-75, Elast-O-Cal 90, Elast-O-Cal (G-50)-90, Elast-O-Cal P-90


Calcium Oxide HP
High purity calcium oxide
The HallStar Co.
ï

A high purity, very dry, conveniently packaged calcium oxide for rubber compounding.

Used in fluoroelastomer compounding; also used as a desiccant in compounding for continuous cures.


CNR
Zinc oxide—doped
Horsehead Corporation
ï

Sp.gr. 5.56; French process znc oxide (made from slab zinc); yellow-buff powder; pb as Pbo 0.002%; avg. surface area 2.8 sq m/g.

Direct curing agent (doped to give good scorch protection) for Neoprene and carboxylated nitrile and other zinc-reactive elastomers (both in the presence and absence of sulfur cure.)


CR 4
ZnO
Western Reserve Chemical
ï

White powder; 99.9% passes 325 mesh; sp.gr. 5.6; surface area 5 m2/g; 99.9% ZnO min.

Activator for NR, SR, reinforcer and pigment.


CR 4 USP
Zinc oxide
Western Reserve Chemical
ï

White powder; 99.9% passes through 325 mesh; sp. gr. 5.6; 99.9% zinc oxide; heavy metal content, carbonate content and alakalinity pass USP tests.

Activator; meets USP specifications.


CR 40
Zinc oxide
Western Reserve Chemical
ï

White powder; 99.9% passes through 325 mesh; sp. gr. 5.6; 99.9% zinc oxide; surface area 5 m2/g; surface treated with propionic acid.

Activator; surface treated to improve dispersion into rubber.


CR 41
Zinc oxide
Western Reserve Chemical
ï

White powder; 99.9% passes through 325 mesh; sp. gr. 5.6; 99.9% zinc oxide; surface area 6 m2/g.

Fine particle size, fast curing.





Cri-Act-45
45% dispersion of a 2/1 ratio of calc. hydroxide and mag. oxide on a fluorocarbon elastomer base
Cri-Tech
ï

Sp.gr. 1.92 ±.05; solubility - esters and ketones; appearance - opaque, brownish, chopped or slab.

Used at the 10-20 part level in fluoroelastomer compounding for consistent rheology and excellent dispersion.


Cri-Act-45 1/1
45% dispersion of a 1/1 ratio of calc. hydroxide and mag. oxide on a fluorocarbon elastomer base
Cri-Tech
ï

Sp.gr. 1.98±.05; solubility - esters and ketones; appearance - opaque, brownish yellow, chopped or slab.

Used at the 10-20 part level in fluoroelastomer compounding for consistent rheology and excellent dispersion.


Cri-Act-45-LV
45% dispersion of a 2/1 ratio of calc. hydroxide and mag. oxide on a fluorocarbon elastomer base
Cri-Tech
ï

Sp.gr. 1.96±.05; solubility - esters and ketones; appearance - opaque, brownish yellow, chopped or slab.

Used at the 10-20 part level in fluoroelastomer compounding for consistent rheology and excellent dispersion; for use in low viscosity compounds.


Cri-C-50
50% dispersion of calcium hydroxide on a fluorocarbon elastomer base
Cri-Tech
ï

Sp.gr. 1.88±.05; solubility - esters and ketones; appearance - opaque, yellow, chopped or slab.

Used at the 6-12 part level in fluorocarbon elastomer compounding.


Cri-FDA-45-1/1
45% disp. of codex food grade calc. hydroxide and mag. oxide in a 1/1 ratio on a fluoroelastomer base
Cri-Tech
ï

Sp. gr. 1.98±.05; solubility - esters and ketones; appearance - opaque, brownish, chopped or slab.

Used at the 10-20 part level in fluoroelastomer compounding for consistent rheology and excellent dispersion.


Cri-Mag-H-40
40% dispersion of high activity magnesium oxide on a fluorocarbon elastomer base
Cri-Tech
ï

Sp.gr. 2.04±.05; solubility - esters and ketones; appearance - dark brown, chopped or slab

Used at the 6-10 part level in fluorocarbon elastomer compounding.


Cri-Mag-M-40
40% dispersion of low activity magnesium oxide on a fluorocarbon elastomer base
Cri-Tech
ï

Sp.gr. 2.04±.05; solubility - esters and ketones; appearance - dark brown, chopped. or slab

Used at the 30-40 part level in fluorocarbon elastomer compounding.


Cri-Ox-50
50% dispersion of calcium oxide on a fluorocarbon elastomer base
Cri-Tech
ï

Sp.gr. 2.11±.05; solubility - esters and ketones; appearance - opaque, off-white, slab.

Used at the 4-10 part level in fluorocarbon elastomer compounding.


Daewoon
Zinc oxide
Intertex World Resources
ï

Low purity, low cost transactivated zinc oxide.

General purpose rubber applications.


D-B-A Accelerator
Dibenzylamine-monobenzylamine blend
Chemtura
ï

Sp.gr. 1.01; pale-yellow free flowing liquid; good storage stability.

For NR, SBR rubbers and latices, NR reclaim; affects air cures ranging from 24 hrs. at room temp to 20 min at 100°C; retarded by clay and other acidic materials; action with xanthates or carbon disulfide enhanced by thiazoles and thiurams; non-discoloring, non-staining; vulcanization requires zinc oxide and sulfur; fatty acids not necessary and can retard cure; can apply carbon disulfide by painting or dipping compounds thus eliminating danger of precure; for processing and applications see C-P-B.





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Suppliers listed
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Flow Polymers LLC

Rhein Chemie Corporation

The HallStar Co.

Horsehead Corporation

Western Reserve Chemical

Cri-Tech

Intertex World Resources

Chemtura

     

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