Rubber Compounding Materials
Vulcanization Materials
Activators


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Composition
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Function & Compounding


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.


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.


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


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.





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-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-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-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-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


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


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.





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Rhein Chemie Corporation

The HallStar Co.

Western Reserve Chemical

Harwick Standard Distribution Corporation

Cri-Tech

     

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