Rubber Compounding Materials
Vulcanization Materials
Activators


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Function & Compounding


Zinox 350
Zinc oxide
American Chemet
ï

Sp.gr. 4.9 g/cc; high surface area ZnO > 21m2/gm; precipitated; nodular; ± 99.5% -325 mesh; cream-off white.

Activator for rubber; neoprene, butyl, nitrile, EPDM, SBR, latex, etc.


CR-4USP-2
Zinc oxide
Harwick Standard
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


CR-4G
Zinc oxide
Harwick Standard
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


Grade 312
Zinc oxide
Perl Pigments, LLC
ï

ZnO-99.3%, Pb-.09%, Fe-.02%, CD-.03%, sulfur-.10%, insoluble-.08%.

Accelerator, activator, vulcanizer


Zinkoxyd Aktiv
Zinc oxide
Lanxess Corporation
ï

Sp. gr, 5.0; white to light yellowish powder; zinc oxide content min. 93; BET surface area approx. 45 m2/g; shipped: bag.

A very highly disperse activator; excellent for the manufacture of semi transparent rubber goods or goods with reduced zinc oxide content; when added at high levels imparts improved shape retention and provides highly elastic vulcanizates; used as an activator in latex compounds resulting low levels of zinc in latex compounds


CR-3
Zinc oxide
Harwick Standard
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


Ken-Zinc
Zinc oxide - bar form
Flow Polymers LLC
ï

Activator in bar form


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

Pellets- 140 micron filtered

Dispersion for easy incorporation;see also CR Zinc oxides


ZnO, Sovsperse ZnO-85
Zinc oxide 85% active dispersed in an elastomeric binder
Sovereign Chemical Company
ï

Sp.gr. 3.10; small granules

Activator in sulfur based cure systems and a vulcanizer for halobutyl rubbers


Struktol WB 700A
Zinc oxide 91%; dispersing agent 9%
Struktol Company of America, LLC
ï

Specific gravity: 3.85; bulk density: 1,200; ash content: 91%; appearance: non-dusting powder

A non-dusting powder and is preferably used, where high amounts of dispersing agents are undesirable; shorter mixing time can be achieved compared to powered zinc oxide due to faster incorporation and the temperature of the compound is increased only slightly, which is an advantage in scorchy stocks; can be used in small dosages due to the uniform dispersion of the zinc oxide; formation of agglomerates, variations of the physical values and brittleness of the vulcanized rubber are reduced; physical properties of the vulcanizates are improved, especially after aging.





Akro-Zinc Bar 85
Zinc oxide dispersion
Akrochem Corp.
ï

Sp.gr. 3.60, zinc oxide 85%; 6 lb. bar; 54 lb carton.

Use in place of zinc oxide powder on a part for part basis; use for applications where a pre-wetted product is desirable; G type Neoprenes where addition of zinc oxide late in mix is indicated; low hardness compounds where zinc oxide dispersion is amust.


Zic-Stick '85'
Zinc oxide dispersion
Rhein Chemie Corporation
ï

Sp.gr. 3.66; zinc oxide content approx 90%; very fine dispersion of highly active zinc oxide

Activator for NR and SRs; vulcanizer for polychloroprene and other halogenated elastomers; superior activity coupled with rapid complete incorporation enables 3 parts of Zic Stick 85 to replace 5 parts of zinc oxide powder in most applications.


Akrochem Treated Zinc Oxides
Zinc oxide surface treated with proprionic acid
Akrochem Corp.
ï

Sp.gr. 5.6; primary zinc oxide; odorless, non-toxic, fine white powder.

NR, SR activator reinforcer, good inorganic color; add directly to rubber, easy dispersing.


Grade 318T American Process
Zinc oxide treated
Perl Pigments, LLC
ï

ZnO-99.3%, Pb-.09%, Fe-.02%, CD-.03%, sulfur-.10%, insoluble-.08%.

Accelerator, activator, vulcanizer


CR-40
Zinc oxide- treated
Harwick Standard
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.


Struktol Zinc Laurate
Zinc salt of lauric acid
Struktol Company of America, LLC
ï

Specific gravity: 1.08; drop point: 125-135C; appearance: white pastille or course powder

Used as an activator for thiazoles, thiurams and dithicarbomates by supplying fatty acid and soluble zinc; dosage: 1-5 phr; Call for FDA status.


Laurex
Zinc salts of lauric and related fatty acids
Chemtura
ï

Sp.gr. 1.18; tan flaked solid; mp about 107-118°C, but not definitely specified; good storage stability.

For CR, NBR, NR, SBR and their latices; recommended for tire carcass and tread compounds, extruded stocks, proof goods; activates thiazole accelerators and their derivatives; evens out and advances curing rates of off-grade rubbers deficient in natural fatty acids. Low blooming from cured and uncured compounds; much less blooming than many other fatty acid softeners; non-discoloring; melts, disperses readily.


Zinc Stearate Line
Zinc stearate
Harwick Standard
ï

White powder or prill; 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.


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.


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Click companies below for more information about Activators

Suppliers listed
on this page

American Chemet

Harwick Standard

Perl Pigments, LLC

Lanxess Corporation

Flow Polymers LLC

Sovereign Chemical Company

Struktol Company of America, LLC

Akrochem Corp.

Rhein Chemie Corporation

Chemtura

Western Reserve Chemical

     

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