Trapylen® 145 X 5 is a chemically modified low-chlorinated polypropylene renowned for its remarkable affinity to polyolefinic plastics, including PP, PP/EPDM-blends, and, with certain limitations in adhesion strength, PE. The resin in Trapylen® 145 X 5 is characterized by a higher molecular weight within the range of 110,000 and a significantly lower chlorine content compared to other maleic-modified Trapylen® grades. These specific properties contribute to improved adhesion, as well as enhanced heat and chemical resistance. It is primarily utilized as a straight primer, with its principal application in the treatment of molded parts and sealing profiles in the automotive industry, including bumpers, side panels, and door seals.

Functions: Adhesion Promoter, Coupling Agent

Product Type: Primer

Application Area: Automotive Bumpers, Side Panels

Application Method: Brush, Dip Coating, Spray

Technical Data Sheet

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Identification & Functionality

Product Type
CASE Ingredients Functions

Features & Benefits

CASE Ingredients Features
Ready-to-Use Product Features
Product Highlights
  • TRAPYLEN® 145 X 5 is a chemically modified low chlorinated polypropylene with outstanding affinity to polyolefinic plastics such as PP, PP/EPDM-blends and, with limitations to adhesion strength, to PE.
  • The resin in TRAPYLEN® 145 X 5 has a higher molecular weight in range of 110 000 and a much lower chlorine content in comparision to other maleic modified TRAPYLEN® grades. These properties improve the adhesion and as well the heat and chemical resistance but lower the solubility and compatibility.

Applications & Uses

Application Method
Compatible Substrates & Surfaces
Coating Type

Application: TRAPYLEN® 145 X 5 is a ready to use primer with 5 % solids and can be applied by spraying, dipping, brushing or printing.

  • Drying conditions: 30 s at 80 °C (100 °C), residual quantity of resin about 3 - 4 g/m².

Uses: TRAPYLEN® 145 X 5 is used as a straight primer. Its principal use is for treatment of molded parts and sealing profiles in the automotive industry, such as bumpers, side panels and door seals. Furthermore it is used in industrial applications where PP based plastics are chemically pretreated.


Physical Form
Low viscous yellow liquid
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content5.0%-
Chlorine Content15%-
Softening Point105°C-
Drying Conditions (at 80°C)30seconds-
Residual Quantity of Resin3 - 4g/m²-

Packaging & Availability

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

Iron drums of 170 kg.

Storage & Handling

Storage and Shelf Life Conditions
  • At least 6 months in closed packing at 15 °C.
  • Stir well before every use.