Trapylen® 9350 W serves as a versatile adhesion promoter or primer for film applications. It can be applied through spraying, dipping, brushing, or printing methods. This adhesion promoter is formulated with chemically modified polypropylene dissolved in water, exhibiting exceptional compatibility with polyolefin substrates. Specifically designed to enhance surface tension on treated and untreated PP, PE, and polyolefin blend films, foils, foams, and molded parts.

Chemical Family: Polyolefins, Polypropylenes (PP)

Functions: Adhesion Promoter, Coupling Agent

Product Type: Primer

Labeling Claims: Chlorine-free

Application Area: Automotive Bumpers, Furniture, Mobile, Panels

Application Method: Brush, Dip Coating, Spray

Technical Data Sheet

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Identification & Functionality

Product Type
CASE Ingredients Functions

Features & Benefits

Labeling Claims
CASE Ingredients Features
Product Highlights
  • TRAPYLEN® 9350 W is an adhesion promoter based on chemically modified, polypropylene dissolved in water. It has outstanding affinity to polyolefinic substrates.
  • It is especially developed to improve surface tension of treated and untreated films, foils, foams and even molded parts of PP, PE, polyolefinic blends, a.o.
  • The increase of wetting properties permits the bonding, printing, flocking and painting of such substrates.
  • TRAPYLEN® 9350 W can be occasionally used as adhesion promoter incorporated in adhesives, inks and paints in case of sufficient compatibility.
  • Heat and humidity resistance of the dry film can be improved by using crosslinker TRASET 64294 W.

Applications & Uses

Application Method
Coating Type

TRAPYLEN® 9350 W can be used as a straight primer for film application or as adhesion promoter. If used as a primer it can be applied by spraying, dipping, brushing or printing.

  • Drying conditions: 60 s at 80 °C (100 °C).
  • Residual quantity: 0.5 - 1.5 g/m².

When using TRAPYLEN® 9350 W as adhesion promoter in base coats/pigmented primers, the compatibility of the system must be checked. Recommended dosage of TRAPYLEN® 9350 W: about 30% of 100 % formula. The resulting base coat can be applied by spraying, dipping, brushing or printing if the system allows it.

  • Drying conditions: Usually 30 min at 80 °C.
  • Residual quantity: 15 g/m².


Low viscous white liquid
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content12.3%-
Flow Time38seconds-
Residual Quantity of Resin15g/m²-
Residual Quantity of Resin0.5 - 1.5g/m²-

Packaging & Availability

Packaging Type
Regional Availability
  • Canada
  • Mexico
  • USA
Packaging Information

PE - drums of 120kg

Storage & Handling

Storage and Shelf Life Conditions
  • At least 6 months in closed packing at 15°C.
  • Protect TRAPYLEN® 9350 W from frost.
  • TRAPYLEN® 9350 W is also available with matting agents.