TRAPYLEN primers for molded plastics
Primers and adhesion promoters for painting and coating molded polyolefin parts. PP, PP/EPDM blends and GMT, in solvent, waterborne and solid form, chlorinated and chlorine free.
Primers and adhesion promoters for painting and coating molded polyolefin parts. PP, PP/EPDM blends and GMT, in solvent, waterborne and solid form, chlorinated and chlorine free.
Molded polyolefin parts resist paint, and a TRAPYLEN primer is the chemical route to adhesion on PP, PP/EPDM blends and GMT. The resin is applied either as a straight primer, a thin unmodified film between the part and the coating, or as an adhesion promoter blended into a pigmented primer or base coat. Both routes work by dip coating, spraying or pad printing, so the primer fits an existing coating line without new surface-treatment hardware.
The case covers industrial and consumer goods work on molded polyolefin, including housings, panels, profiles and containers, and chemically pretreated PP in general industry. Automotive painting of PP and TPO parts is also a long-standing use of these grades. Adhesives and flocking systems for sealing profiles draw on the same chemistry.
Nineteen grades are current. The maleic-modified CPO solutions run from the 130 X standard through higher softening point and better compatibility variants to 777, an NCO-crosslinkable grade at just 5 percent chlorine. The waterborne dispersions are APEO-free and carry 30 percent solids. The chlorine free APO grades, in xylene, in water and as solid resin, cover the work where chlorine is unwelcome, and the newest additions to the case are chlorine free.
Selected case one grades, 130 X and 777 among them, pass through our US warehouse. The rest of the range ships made to order from the German plant, so plan a first order against a trial rather than a shortage.
| Property | Typical value |
|---|---|
| Chemistry | Modified CPO and chlorine free APO |
| Chlorine content | 5 to 28 percent on the CPO grades, zero on the APO grades |
| Forms | Solutions in xylene, butyl acetate, MEK or toluene, waterborne dispersions, solid resins |
| Solids content | 10 to 35 percent in solution, 30 percent waterborne, 100 percent solid |
| Waterborne surfactant status | APEO-free across the waterborne grades |
| Recommended primer solids at application | 5 percent from solution, 10 percent from dispersion |
| Storage stability | At least 6 to 12 months in closed packing at 15 degrees C, by grade |
Dosage: Applied as a coating. As a straight primer the dry film runs 3 to 5 grams per square meter, and above that the low molecular weight of the resin can cause cohesive failure in the primer layer. Blended into a pigmented primer or base coat the residual quantity runs around 15 grams per square meter.
Typical values from the manufacturer's technical data sheet. They describe the product, they are not a specification. We will send the current TDS and the batch documentation your qualification needs.
Tell us the binder system, the property you are targeting, and the volume you expect. We will confirm the grade, send the documentation, and get a sample of the candidate grade to you.
| Grade | Chemistry | Chlorine content | Form and carrier | Solids or Mw | What it is for |
|---|---|---|---|---|---|
| 112 BAC 10 | Modified CPO | 20.5% | Solution in butyl acetate | 10% | Aromatic-free |
| 114 X | Modified CPO | 20.5% | Solution in xylene | 20% | Lower molecular weight, higher softening point than 112 X |
| 128 MEK | Modified CPO | 28% | Solution in MEK | 20% | Good adhesion and compatibility |
| 130 X | Modified CPO | 24.5% | Solution in xylene | 20% | The standard grade of the case |
| 135 X | Modified CPO | 22% | Solution in xylene | 15% | Higher softening point |
| 137 X | Modified CPO | 22% | Solution in xylene | 20% | Better compatibility than 135 X |
| 139 S | Modified CPO | 11% | Solid resin | 100% | Good compatibility, for your own solvent system |
| 146 X | Modified CPO | 19% | Solution in xylene | 20% | Better compatibility than 145 X 5 |
| 777 | Modified CPO | 5% | Solution in toluene blend | 35% | NCO-crosslinkable with polyisocyanates |
| 6600 W | Modified CPO | 20% | Waterborne dispersion | 30% | Adhesion promoter, APEO-free |
| 6700 W | Modified CPO | 22% | Waterborne dispersion | 30% | Adhesion promoter, APEO-free |
| 6800 W | Modified CPO | 25% | Waterborne dispersion | 30% | Adhesion promoter, APEO-free |
| 911 S | APO | Chlorine free | Solid resin | 100% | Base APO polymer |
| 920 X | APO | Chlorine free | Solution in xylene | 10% | Amorphous polymer |
| 950 X | APO | Chlorine free | Solution in xylene | 10% | Crystalline polymer |
| 9351 W 30 | APO | Chlorine free | Waterborne dispersion | 30% | Crosslinkable |
| 9500 W | APO | Chlorine free | Waterborne dispersion | 30% | High softening point, the newest grade of the case |
| 9600 W | APO | Chlorine free | Waterborne dispersion | 30% | Chlorine- and APEO-free |
| 9700 W | APO | Chlorine free | Waterborne dispersion | 30% | Additive for PE, APEO-free |
Values are the manufacturer's published typical figures. Ask for the current technical data sheet on any grade and we will send it with the matching safety data sheet.
Housings, panels, containers and profiles in PP and PP/EPDM, primed for paint on an ordinary coating line.
The resin blended with co-binders and pigments, so the primer and the color coat land in one pass.
The same affinity to polyolefin serves adhesive and flocking work on sealing profiles.
Anywhere PP-based plastics are chemically pretreated before a following process.
Painting of molded parts and sealing profiles is a long-standing application of the case.
It is specified where the formulation needs paint adhesion on PP, PP/EPDM blends and GMT without flame or plasma hardware, chlorine free APO options in solvent, water and solid form, aPEO-free waterborne dispersions at 30 percent solids, a crosslinkable low-chlorine grade for two-component systems, and solid resins for formulators who run their own solvent system.
As a straight primer, dilute a solution grade to 5 percent solids or run a dispersion at 10 percent, then apply by spraying, dipping, brushing or pad printing. Film forming needs 30 seconds at 80 to 100 degrees C, and drying above the softening point of the grade gives the best adhesion.
Solid resins dissolve at 1 part resin to 2 parts solvent under dissolver agitation, held at 60 degrees C for at least 3 hours, then adjusted to working solids and filtered.
As an adhesion promoter in a pigmented primer or base coat the compatibility of the whole system has to be checked. Suitable co-binders for solvent systems are hydroxyl-modified acrylics and butyl methacrylate resins, and the co-binder has to stay soluble in aromatic hydrocarbons. Epoxy resins and polyols work as reactive low molecular weight binders.
The waterborne grades carry no surfactant package of their own and are meant as raw materials for your formulation. Keep application solids at 10 percent or above so wetting works with a small surfactant addition; an excess of surfactant costs adhesion between primer and coating. They are compatible with non-ionically stabilized, alkali-tolerant polymer dispersions.
Gel formation is possible in the xylene solution grades at low storage temperatures. It is reversible and has no influence on quality; warm the drums to 40 to 50 degrees C until the solution returns to liquid phase.
Package sizes: Iron drums of 170 kg for the solution grades, PE drums for the waterborne grades, cartons of 15 kg with PE inliner for the solid resins. Other packing on request..
Storage: At least 6 months in closed original packing at 15 degrees C on most solution grades, 12 months on 112 S and 777. Confirm the figure on the current data sheet for your grade.
Refer to the current safety data sheet for hazard classification and handling. The APO grades are chlorine free and the waterborne grades are APEO-free per Tramaco's published data.
In many industrial settings yes. The primer does the adhesion work chemically, so a shop without surface-activation hardware can paint PP on its existing line. Whether it replaces an existing physical pretreatment on your part depends on the substrate and the coating on top, which is what the trial is for.
130 X in xylene is the standard of the case and the usual starting point. Waterborne lines start with 6600 W to 6800 W, and a chlorine free requirement points at 920 X, the 9000-series dispersions or the 911 S solid. Tell us the line and the constraint and we will pick the candidate with you.
The APO grades exist for exactly that work and carry it in xylene, in water and as solid resin. Performance is system-dependent, so we set the trial up against the CPO benchmark and let the panel decide.
The maleic-modified xylene solutions can gel at low temperatures. The gel is reversible and quality is unaffected. Warm the drum to 40 to 50 degrees C until it returns to liquid phase, stir, and run it normally.
Yes. We send the Technical Data Sheet (TDS), Safety Data Sheet (SDS), and Information leaflet for coating of plastic parts on request, in the manufacturer's current revision. Use Request TDS or SDS above and tell us what your qualification review needs.
Case three of the range, for solvent-based and UV-curable inks on polyolefin film.
Case two of the range, ready-to-use primers for TPO and PE film.
The category page, with the form-by-form selection logic.
Why polyolefins resist bonding and what the chlorinated polyolefin does about it.