PRODUCTS

MEDIAPLAST PK

Mediaplast PK is used primarily in rubber compounding processes where improved adhesion or “green tackiness” is beneficial.
Mediaplast PK is used to improve rubber–rubber and rubber–textile adhesion, e.g., when bonding rubber layers together or bonding rubber to fabric/textile inserts.

CAS Number: Not assigned
EC Number (EINECS): Not assigned
Molecular Formula: Not applicable
Molecular Weight: Not applicable

SYNONYMS:
Mediaplast PK, Mediaplast PK (Kettlitz), Kettlitz Mediaplast PK, Mediaplast-PK tackifier, Mediaplast PK, Kettlitz Mediaplast PK, Mediaplast-PK tackifier

Mediaplast PK is a tackifier / processing aid produced.
Mediaplast PK’s formulated as a low-viscosity synthetic aromatic resin sprayed onto a silica carrier and supplied as a powder to improve the green tack (stickiness of uncured rubber) and adhesion (rubber-to-rubber, rubber-to-textile, rubber-to-metal) in polar rubber compounds such as NBR, HNBR, CR, EVA and similar elastomers.

Mediaplast PK is intended for use where a powdered, non-liquid tackifier is preferred for handling and dosing.
Powdered form (non-liquid): Mediaplast PK is easier / cleaner handling and dosing in dry mixing lines compared to liquid tackifiers.
Mediaplast PK has good compatibility with polar elastomer systems due to the aromatic synthetic resin chemistry sprayed onto silica.

Consistent lot-controlled quality: key physical properties are tested per production lot and documented on the Certificate of Analysis.
Because it is a trade formulation rather than a single chemical, Mediaplast PK does not have a CAS number, EC number, molecular formula, or molecular weight.

The manufacturer provides batch-specific Certificates of Analysis detailing ash content, density, and other properties, reflecting the fact that physical characteristics can vary slightly between production lots.
Typical ash content of Mediaplast PK is around 28%, representing the silica carrier, and the powder has a density of approximately 1.10 g/cm³.

The powdered form of Mediaplast PK is whitish, free-flowing, and stable under standard storage conditions, with a shelf life of about 3 years.
Mediaplast PK is described by its manufacturer (Kettlitz Chemie) as a tackifier / processing-aid in the rubber industry. It is a “liquid synthetic resin with aromatic character, sprayed on silica” and delivered in a powder form (whitish powder) for ease of handling.

Mediaplast PK is intended for use in polar rubber / elastomer compounds — e.g. rubbers like Nitrile Butadiene Rubber (NBR), high-nitrile NBR (H- or X-NBR), or polymer blends such as those including Ethylene‑Vinyl Acetate (EVA).

USES and APPLICATIONS of MEDIAPLAST PK:
Applications for Mediaplast PK include rubber-to-rubber adhesion during calendering, lamination of multi-layer hoses, tire innerliner assembly, coated textiles, seals, gaskets, and other elastomeric products where temporary stickiness is critical before vulcanization.
Its powdered form makes Mediaplast PK particularly suited for automated production lines, where precise dosing and clean handling are essential.

In essence, Mediaplast PK is a high-performance, lot-controlled tackifier powder that provides formulators with a reliable method to improve green tack, maintain cleanliness, and ensure consistent adhesion in polar rubber processing, without altering the final cured material properties.

Applications of Mediaplast PK: calendering/lamination (rubber-to-textile bonding), preforming, multi-ply assembly, where improved tack on the uncured article is required; useful in manufacturing of hoses, seals, gaskets, and coated textiles.
Mediaplast PK improves green tack — enables better handling, assembly and adhesion of uncured layers.

Mediaplast PK is a specialized powdered tackifier produced for use in polar elastomer systems such as NBR, HNBR, CR, EVA, and related rubbers.
Unlike liquid tackifiers, Mediaplast PK is supplied as a resin-coated silica powder, making it easier to handle in dry mixing processes and minimizing dust generation compared to loose powders.

Mediaplast PK's primary role is to improve the “green tack” of uncured rubber compounds, which is the temporary stickiness that helps layers adhere to each other, facilitates calendering, lamination, or assembly of multi-ply components, and ensures better interlayer adhesion for preformed shapes or coated textiles.

Mediaplast PK is composed of low-viscosity aromatic synthetic resins sprayed onto a silica carrier.
From a performance standpoint, Mediaplast PK provides consistent green tack without negatively affecting the cured properties of the rubber.
Mediaplast PK's aromatic resin content ensures compatibility with polar polymers, promoting uniform dispersion and strong adhesion during processing.

Because Mediaplast PK is low-volatility and stable under normal storage, it can be safely used at normal processing temperatures without significant resin migration or performance loss.
Mediaplast PK form also reduces the risk of surface staining and allows easier handling in automated dosing equipment.

Mediaplast PK is not a classic plasticizer — instead, its main function is to improve “green tackiness” (stickiness) and adhesion, helping with rubber–rubber or rubber–textile bonding (for instance in applications where adhesion is required), and to enhance processability of rubber compounds.

For compounds based on polar rubbers or polar polymer blends, such as NBR, H-/X-NBR, EVA, where tackifiers like Mediaplast PK aid processability and adhesion.
As a processing aid in rubber mixing and manufacturing — by improving the “green strength” (uncured compound’s cohesion/stickiness), making handling, calendering, molding or layering easier before vulcanization.

In production of multi-layer rubber articles, rubber-textile composites, Mediaplast PK, fabric-reinforced rubber, hoses, seals or composite rubber products where good interlayer adhesion is needed. (Because of the adhesion-enhancing nature.)

Recommended dosage for Mediaplast PK is typically 3–6 phr (parts per hundred of rubber) added at the end of the mixing cycle to maximize effect.
After curing / vulcanization (when used properly), rubber compounds containing Mediaplast PK are said to be “fully compatible” with a wide range of rubber formulations.

BENEFITS / ADVANTAGES of MEDIAPLAST PK:
Using Mediaplast PK offers several advantages for rubber compounders and manufacturers:
Improved green tackiness / adhesion — Mediaplast PK helps rubber-to-rubber or rubber-to-textile bonding in uncured compounds, which is critical for manufacturing layered or composite rubber products.

Better processability and handling — Mediaplast PK increased “green strength” and tack make mixing, calendering or layering easier, reducing risk of delamination or poor bonding before vulcanization.

Compatibility with polar rubbers / polymer blends — specially designed for polar rubber matrices such as NBR or blends with polar polymers (like EVA), where typical nonpolar plasticizers or tackifiers might not perform well.

Ease of handling (powder form) — as a powder (resin on silica), rather than a sticky liquid, Mediaplast PK is easier to dose and incorporate uniformly in a batch — and has a shelf-stability of up to 3 years.

Good final product compatibility — when used at recommended dosage and processing conditions, Mediaplast PK does not interfere with vulcanization or final product properties and yields rubber articles compatible with standard elastomer systems.

KEY NOTES & LIMITATIONS of MEDIAPLAST PK:
Mediaplast PK is not a conventional plasticizer or softener.
Its primary purpose is to improve tackiness/adhesion and processing — so if you want to make the rubber soft or flexible, different additives (plasticizers, oils) may be needed depending on the formulation.

Because its chemical nature is an aromatic synthetic resin on silica and not a simple defined molecule, you will not find a distinct CAS number or a single molecular formula for “Mediaplast PK” — the manufacturer’s documentation does not list a CAS.
Optimum performance depends on correct dosage (3–6 phr), and the product should be added at the end of the mixing cycle to maximize its tackifier effect.

Because of its aromatic resin character, compatibility — especially in strongly polar elastomers or special polymer blends — should be verified in test formulations.
While the manufacturer states broad compatibility with polar rubbers, one must always test for each specific recipe.

CHEMICAL TYPE of MEDIAPLAST PK:
Low-viscosity aromatic synthetic resin (tackifying resin) sprayed on silica (carrier).
The resin has an “aromatic character” which helps compatibility with polar elastomers.
Because Mediaplast PK is a formulation (resin on silica), it is a trade product — not a single pure chemical — so an overall molecular formula / single molecular weight / unique CAS or EC number does not apply to the trade name.

PRIMARY FUNCTION of MEDIAPLAST PK:
Mediaplast PK improves green tack and interlayer adhesion in uncured polar rubber compounds.

TARGET POLYMERS of MEDIAPLAST PK:
polar elastomers such as NBR, HNBR, CR, EVA, and other polar rubbers and blends.

PHYSICAL and CHEMICAL PROPERTIES of MEDIAPLAST PK:
Appearance (form): Whitish powder (powdered product).
Chemical characterization (short): Low-viscous aromatic synthetic resin sprayed onto silica.
Ash content: 28.0 ± 2.5 % (measured by Kettlitz method T.4). This reflects the inorganic carrier (silica) content.
Density (20 °C): approximately 1.10 g·cm⁻³ (computed / guide value).
Colour: whitish (powder).
Form / Appearance: Whitish powder, free-flowing
Chemical characterization: Low-viscosity aromatic synthetic resin sprayed on silica (tackifier)
Ash content: ~28% (represents silica carrier)
Density (20 °C): ~1.10 g/cm³

Color: Whitish, non-staining
Odor: Mild, typical for aromatic resins
Solubility: Insoluble in water; compatible with polar elastomers (NBR, HNBR, CR, EVA, etc.)
Physical state: Powder; stable, does not liquefy under normal storage conditions
Volatility: Very low; designed for minimal resin migration
Storage stability / shelf life: ~3 years under proper storage (dry, sealed containers)
Reactivity: Chemically stable under standard conditions; avoid strong oxidizers and open flame
Vapor pressure: Not quantified; powder form minimizes dust and volatilization
Storage stability / shelf life: 3 years under proper storage conditions (sealed, dry).

FIRST AID MEASURES of MEDIAPLAST PK:
-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 MEDIAPLAST PK:
-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 MEDIAPLAST PK:
-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 MEDIAPLAST PK:
-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 MEDIAPLAST PK:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

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