KEZADOL PCI

Kezadol PCI is used desiccant in continuous pressureless vulcanization systems (e.g., microwave, LCM, hot air) especially for polar rubbers like NBR (nitrile butadiene rubber).
Kezadol PCI is used in PVC plastisols, particularly in carpet backing layers.
Kezadol PCI can be used in 1‑ or 2‑component PU systems to remove moisture.

CAS Number (active component): For CaO, the CAS is 1305‑78‑8. (Since Kezadol PCI is mostly CaO, this CAS is relevant for the active part.)
EC / EINECS Number (for CaO): 215‑138‑9.
Molecular Formula (active component): CaO
Molecular Weight (CaO): ~56.08 g/mol

SYNONYMS:
Kezadol PCI, Kettlitz Kezadol PCI, Calcium oxide desiccant powder, Surface-treated CaO powder, Calcium oxide (CaO), Calcium oxide, Calx, Calcium monoxide, Caloxol W 3, Calcia, Calxyl, Rhenosorb C, Rhenosorb F, Desical P, Caloxol CP 2, Burnt lime, Calcia (CaO), Airlock, Quicklime (CaO), CML 31, Bell CML(E), CML 21, CML 35, Vesta PP, QC-X, Bell CML(P), Caloxal CPA, CSQ, CML 35S, E 529, FCA 8A, F Raimu 1300D, F Raimu 900K, Nanotek CaO, Mikuronraimu, NanoActive CaO, NanoActive CaO Plus, Calciogreen, Caltrac, KSX, Rhenogran CaO 80, Bell CML 41, Chelan, Power-Ca, Moisutoppu 10, Borumikku, Vesta 20, NanoActive Calcium Oxide, Shell Lime HTO, Fishcal, CAC 20209A, Rhenofit F, Moisutoppu 20, Rhenofit C, Stomilex, Vesta QCX, CA 602, OM 1, OM 1 (pigment), Polycal OFT 15, DryPaste S 1, Hyper Expan M, Nekafin 2, Polycal O 5325, Polycal OS 325, Caloxol CP 2HU, CaO, CL 90Q90, CaO WFK Super 40, CaO 80, UPC-B 01, JYQ-S 02, F Raimu 1300K, Calcium oxide (CaO), TK 107, Rapidquell Quicklime CL 90Q, Vesta 18, WKF 40, HAL-G, Seisekkai J 1P, Kezadol PCI, HAL-J, 12610-14-9, 60873-85-0, 104624-96-6, 245321-52-2, 2641773-61-5, Kezadol PCI, Kettlitz Kezadol PCI, calcium oxide desiccant powder, surface-treated CaO powder

 
Kezadol PCI is a surface-treated calcium oxide powder produced.
Kezadol PCIserves as an effective desiccant (moisture scavenger) for polymer and rubber systems.
Because Kezadol PCI is coated with a chemically inert hydrocarbon, its dust generation is reduced, and it exhibits less unintended reactivity with ambient moisture.

Kezadol PCI is a surface treated calcium oxide powder for use as an effective desiccant.
The calcium oxide is coated by a chemically indifferent hydrocarbon.
Due to this preparation, Kezadol PCI has a reduced air pollution.

Additionally there will not be any unintended reaction with humidity.
The dosage level of Kezadol PCI depends on the moisture of the several compounds.
Considering the active content of calcium oxide we can say that 70 grams of Kezadol PCI are able to absorb 18 grams (= 1 mol) of water.

The hydrocarbon coating not only prevents premature moisture reaction but also reduces airborne dust, which improves workplace safety and air quality during handling.
This is especially beneficial in industrial rubber compounding plants where dust control is critical.

According to the technical data, Kezadol PCI should be stored in sealed, dry packaging to avoid moisture exposure.
Shelf life of Kezadol PCI is indicated as 1 year, when stored under cool and dry conditions.
Kezadol PCI is a white or gray, odorless lumps or granular powder.

Kezadol PCI appears as an odorless, white or gray-white solid in the form of hard lumps.
Kezadol PCI is odourless, hard, white or greyish white masses of granules, or white to greyish powder.
Kezadol PCI is a white or gray, odorless lumps or granular powder.

Kezadol PCI appears as an odorless, white or gray-white solid in the form of hard lumps.
Kezadol PCI is a member of the class of calcium oxides of calcium and oxygen in a 1:1 ratio.
Kezadol PCI has a role as a fertilizer.

Kezadol PCI is a surface treated calcium oxide powder for use as an effective desiccant.
Kezadol PCI is coated by a chemically indifferent hydrocarbon.
Due to this preparation Kezadol PCI has a reduced air pollution.

Additionally there will not be any unintended reaction with humidity.
Surface treated Calcium Oxide Coated with special dispersing agents especially developed for plastic application, extremely soft compounds & polymer solutions like PVC plastisols.

Kezadol PCI is a fine, surface-treated calcium oxide powder produce, designed for moisture control in rubber, polymer, and polyurethane systems.
The active component of Kezadol PCI is calcium oxide (CaO), making up approximately 89% of the powder, while the remaining fraction consists of a chemically inert hydrocarbon coating.

This coating reduces dust generation during handling and slows premature reactivity with ambient moisture, making Kezadol PCI more stable during storage and easier to work with compared to uncoated CaO.
Kezadol PCI is very fine, with an average particle size of around 7 micrometers, which helps ensure uniform dispersion in compounds and minimizes potential defects caused by expansion when CaO reacts with water to form calcium hydroxide (Ca(OH)₂).

Physically, Kezadol PCI appears as a light grey, fine powder with a density of approximately 2.73 g/cm³.
Kezadol PCI should be stored in cool, dry, sealed containers, with a shelf life of around one year.
Exposure to moisture during storage can partially convert CaO to Ca(OH)₂, reducing its effectiveness as a desiccant.

Kezadol PCI has dual functionality.
First, Kezadol PCI acts as an effective moisture scavenger, reacting with water in uncured rubber, PVC, PU, and other polymer systems to prevent defects such as blisters, porosity, and uneven curing.

Second, Kezadol PCI can help neutralize acids that may form in polar rubber systems or PVC plastisols, thereby protecting processing equipment from corrosion and reducing the formation of nitrosamines.
Kezadol PCI is highly compatible with a wide variety of materials, including nitrile rubber (NBR), polyurethane (PU), PVC plastisols, silicone rubbers, and other specialty polymers.

Kezadol PCI's fine particle size and surface coating enable excellent dispersion throughout the compound, ensuring uniform moisture removal and minimizing speck formation in the final product.

USES and APPLICATIONS of KEZADOL PCI:
Kezadol PCI is a multi-functional, high-performance desiccant that enhances compound quality, reduces defects, provides controlled reactivity, and improves safety and efficiency in polymer and rubber processing.
Rubber Industry: Kezadol PCI is used desiccant in continuous pressureless vulcanization systems (e.g., microwave, LCM, hot air) especially for polar rubbers like NBR (nitrile butadiene rubber).

Polymer Systems: Kezadol PCI is used in PVC plastisols, particularly in carpet backing layers.
Polyurethane Systems: Kezadol PCI can be used in 1‑ or 2‑component PU systems to remove moisture.
Pigment / Solvent Systems: Kezadol PCI is used in pigment colors containing solvents, where moisture control is needed to avoid defects.

High-Performance / Specialty Polymers: Kezadol PCI is suitable for polysulfide and silicone compounds, per Kettlitz’s product description.
Kezadol PCI can be used in PVC-plastisols, for carpet-back layers, polysulfide- and silicone-compounds, polyurethane-systems as well as for metal-pigment-colors containing solvents.

Using Kezadol PCI can help reduce defects (such as porosity or blistering) in finished products by more precisely controlling moisture.
Because of its high efficiency (due to very fine CaO), Kezadol PCI allows lower additive usage, which can reduce cost and minimize impact on mechanical properties of the final product.

The controlled reactivity (via coating) enables more flexibility in process design: formulators can mix, store, and process compounds without the risk of premature reaction that might degrade performance or cause handling issues.
Kezadol PCI is a surface treated calcium oxide powder for use as an effective desiccant.

The calcium oxide is coated by a chemically indifferent hydrocarbon.
Due to this preparation Kezadol PCI has a reduced air pollution.
Additionally there will not be any unintended reaction with humidity.

Surface treated Kezadol PCI with special dispersing agents especially developed for plastic application, extremely soft compounds & polymer solutions like PVC plastisols.
Kezadol PCI is used in insecticides and fertilizers.

Typical applications of Kezadol PCI include continuous, pressureless vulcanization, PU systems, foam and cellular systems, solvent-based pigment compounds, and specialty polymer formulations.

In practice, around 70 grams of Kezadol PCI can absorb approximately 18 grams of water, reflecting its high efficiency.
The controlled reactivity of the coated CaO allows formulators to mix, store, and process compounds safely without premature reaction.

-Coating to Reduce Dust & Reactivity uses of Kezadol PCI:
Kezadol PCI’s CaO particles are surface-treated / coated with a chemically inert hydrocarbon.
This coating reduces airborne dust during handling.
The coating also helps prevent unintended reaction with humidity while in storage, making PCI more stable than uncoated CaO.

-Applications / Polymer Compatibility of Kezadol PCI:
According to Knowde, Kezadol PCI is compatible with NBR (nitrile rubber), PU (polyurethane), and PVC.
Kezadol PCI can be used in PVC plastisols (e.g. carpet‑back layers), which are very sensitive to water.

Kezadol PCI is suited for continuous pressureless vulcanization in rubber (e.g., microwave / LCM / hot-air) for polar elastomers like NBR.
Kezadol PCI is also used in 1‑ or 2‑component polyurethane systems and in pigmented, solvent-based color systems (metal-pigment colors), where moisture control is critical.

-Moisture Capacity / Dosage Insights:
From the technical leaflet: 70 g of Kezadol PCI can absorb 18 g of water (which corresponds to about one mole of water), given its CaO content.
Because of its high CaO content, Kezadol PCI is very efficient; less powder may be needed compared to lower‑grade or coarse CaO, which helps reduce negative effects on the physical properties of the final vulcanizate.

Uses in systems with very short standing times (between mixing and extrusion) are especially well-suited for Kezadol PCI, because the coating delays reactivity enough to allow handling without premature reaction.

-Physical Expansion Consideration:
Because CaO converts to Ca(OH)₂ when Kezadol PCI reacts with water, its volume increases significantly.
The very fine CaO in Kezadol PCI helps minimize this expansion-related problem, which could otherwise lead to voids, specks, or surface defects.
This feature makes it particularly suitable for foam / cellular systems, TPEs, or filled compounds that are sensitive to internal expansion or blistering.

-Moisture scavenger uses of Kezadol PCI:
Kezadol PCI is a surface treated calcium oxide powder for use as an effective desiccant.
The calcium ox-ide is coated by a chemically indifferent hydrocarbon.

Due to this preparation Kezadol PCI has a reduced air pollution.
Additionally there will not be any unintended reaction with humidity.
Cables, Carpet Backing, Housewares, Pipes, Tires, Tubing,

Kezadol PCI can be used in PVC-plastisols, for carpet-back layers, polysulfide- and silicone-compounds, polyurethane-systems as well as for metal-pigment-colors containing solvents.
Kezadol PCI can also be used in rubber industry for continuous pressureless vulcanization (UHF-, LCM-, Hot-Air-Curing) for polar polymers (e. g. NBR)

COMPOSITION of KEZADOL PCI:
The active substance of Kezadol PCI is calcium oxide (CaO).
According to Kettlitz / Knowde, the CaO content is about 89 % in the PCI grade.
The CaO particles are very finely ground, with an average particle size of around 7 µm.
The CaO is coated with a chemically indifferent (non‑reactive) hydrocarbon, which reduces dust and reduces the tendency to react immediately with water.

BENEFITS & KEY CHARACTERISTICS of KEZADOL PCI:
*Effective Moisture Scavenging: 
High CaO content makes Kezadol PCI very efficient at absorbing water from polymer / rubber compounds.

*Reduced Dust & Cleaner Handling: 
The hydrocarbon coating significantly reduces dust, improving workplace safety.

*Controlled Reactivity: 
Coating reduces unintended reaction during storage, and helps avoid premature moisture absorption.

*Low Speck Risk: 
Because of fine particle size and controlled reaction, risk of “white specks” (unreacted CaO or Ca(OH)₂) in the final polymer may be lower compared to uncoated CaO.

*Broad Application Compatibility: 
Useful in a variety of polymer systems, including PVC, NBR, PU, silicone, and others.

*Improved Product Quality: 
Moisture control helps prevent blisters, porosity, and other defects in molded or extruded products.

MORE IN-DEPTH INFORMATION ON KEZADOL PCI:
High Purity, Fine Particle Size
Kezadol PCI contains around 89% CaO according to its technical leaflet.
The CaO used is extremely fine — the average particle size is reported to be ~7 µm.
The fine particle size is important because when CaO reacts with water, Kezadol PCI turns into calcium hydroxide (Ca(OH)₂) and expands significantly (2–3× volume), so using a fine grade helps minimize issues like “white specks” in the final product.

PHYSICAL and CHEMICAL PROPERTIES of KEZADOL PCI:
Form / Phase: Powder / solid, fine calcium oxide. 
Appearance: Light‑grey powder. 
Density: Approximately 2.73 g/cm³, according to Kettlitz’s own specification sheet. 
Particle Size: Very fine, ~7 µm average. 
Storage Stability: Stable when stored dry and sealed; recommended storage in cool, dry conditions. Knowde mentions standard packaging. 
Chemical / Reactive Properties

Desiccant Activity: CaO reacts with water (moisture in polymer / rubber) to form calcium hydroxide (Ca(OH)₂), thereby scavenging water. 
Low Dust / Low Reactivity: The hydrocarbon coating slows premature reaction with humidity and reduces dust exposure risk. 
Water Absorption Capacity: Based on Kettlitz data, about 70 g of Kezadol PCI can absorb 18 g of water (equal to roughly 1 mole of water). 
Reaction Behavior: Because of the coating, there is “no unintended reaction with humidity” (i.e., the powder will not react too aggressively in storage).
CAS Number (active component): For CaO, the CAS is 1305‑78‑8. (Since Kezadol PCI is mostly CaO, this CAS is relevant for the active part.)

EC / EINECS Number (for CaO): 215-138-9.
Molecular Formula (active component): CaO
Molecular Weight (CaO): ~56.08 g/mol
Molecular Weight：56.07740
Exact Mass：55.95750
EC Number：215-138-9
ICSC Number：0409
UN Number：1910

DSSTox ID：DTXSID5029631
Color/Form：Grey-white, cubic crystals
Colorless, cubic, white crystals
Crystals, white or grayish white lumps, or granular powder
Greyish-yellow, hydroscopic lumps
HScode：2825909000
PSA：17.07000

XLogP3：-0.11880
Appearance：Calcium oxide appears as an odorless, white or gray-white solid in the form of hard lumps. 
Used in insecticides and fertilizers.
Density：3.3-3.4 g/cm3
Melting Point：2572 °C
Boiling Point：2850 °C
Flash Point：2850ºC

Refractive Index：1.83
Water Solubility：Reacts
Storage Conditions：Store at RT.
Vapor Pressure：0 mmHg (approx)
Flammability characteristics：
Noncombustible Solid, but will support combustion by liberation of oxygen.
Explosive limit：No explosive propertiy

Odor：Odorless
PH：SATURATED SOLN IN WATER IS ABOUT 12.8
Experimental Properties：
Crumbles on exposure to moist air
Commercial grade is usually yellowish or brownish tint, due to iron
Readily absorbs CO2 and H2O from air, becoming air-slaked.
A powerful caustic to living tissue. 

The powdered oxide may react explosively with water.
Air and Water Reactions：
Crumbles on exposure to moist air. 
Reacts with water to form corrosive calcium hydroxide, with evolution of much heat. 
Temperatures as high as 800° C have been reached with addition of water (moisture in air or soil). 
The heat of this reaction has caused ignition of neighboring quantities of sulfur, gunpowder, wood, and straw.

Reactive Group： Bases, Strong
Reactivity Alerts： Water-Reactive
Reactivity Profile： A base and an oxidizing agent. Neutralizes acids with generation of heat. 
Nonflammable, but will support combustion by liberation of oxygen, especially in the presence of organic materials. 
Reacts very violently with liquid hydrofluoric acid. 
Reacts extremely violently with phosphorus pentaoxide when reaction is initiated by local heating.
Autoignition Temperature：
Not flammable (USCG, 1999)

FIRST AID MEASURES of KEZADOL PCI:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation: 
Fresh air.
*In case of skin contact: 
Take off immediately all contaminated clothing. 
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact: 
Rinse out with plenty of water. 
Call in ophthalmologist. 
Remove contact lenses.
*If swallowed:
After swallowing: 
Immediately make victim drink water (two glasses at most). 
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of KEZADOL PCI:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains. 
Collect, bind, and pump off spills. 
Observe possible material restrictions. 
Take up dry. 
Dispose of properly. 
Clean up affected area.

FIRE FIGHTING MEASURES of KEZADOL PCI:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2) 
Foam 
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of KEZADOL PCI:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection. 
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A 
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of KEZADOL PCI:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of KEZADOL PCI:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available