Additives, resins and crosslinkers for coil coating of steel and aluminium — at line speeds above 100 m/min.
In coil coating the formulation has seconds: uncoil, coat, stove at peak metal temperatures around 230 °C, cool, rewind. Air release and levelling have to happen within that window, or popping and craters travel across the whole strip. After forming into roof or facade profiles, the film must neither crack nor scratch.
Our programme for this: HMMM crosslinkers from Prefere Melamines — the classic in coil stoving systems —, polyester resins from Synres and the BYK additives for air release, levelling and scratch resistance, including the wax additives for formability.
Typical defects — and where the solution lies
Solvent boils at peak temperatures around 230 °C
Design air release for the seconds-long stoving window — solvent and air must escape before the film closes. — Defoamers →
Levelling across the whole strip width
Levelling additives must work uniformly across strip width and speed. — Surface additives →
Scratches and abrasion during forming
Wax additives give the film the slip needed for profiling and bending. — Wax additives →
Crosslinking in the coil stoving window
HMMM crosslinkers are the classic in coil coatings — match reactivity and catalysis to the line. — Amino crosslinkers (melamine) →
Our assessment as a distributor — a first orientation, not a substitute for advice on your specific system.
Our range for this application area
Extract from our product database. Click a name — Coaty will explain the product to you.
Prefere Melamines GmbH
Our classification as a distributor — the manufacturer does not assign this area per product.
BYK
Designated by the manufacturer for this application area.
Synres BV
Designated by the manufacturer for this application area.
Technical data sheets and free samples come directly from us — no detour via the manufacturer. Prices on request.
