DEGACRYL® AC - Engineered for superior bonding in flat lamination
DEGACRYL® AC is Evonik’s family of bead‑type polyacrylates designed as main polymers in one‑component, moisture‑curable reactive hot melt (RHM) adhesives. Built primarily from methyl methacrylate (MMA) and n‑butyl methacrylate (n‑BMA), the product range offers tailored glass transition temperatures (Tg), molecular weights, and functionalities (acid and hydroxyl) to optimize performance in flat lamination processes and multilayer panel construction.
Key Benefits DEGACRYL® AC
- Easy handling thanks to low particle size and short dilution time
- Low viscosity with very long open time for large assemblies and complex layups
- Aggressive tack and high initial strength for fast, reliable bonding without extra fixation
- Outstanding creep resistance directly after bonding to keep parts in place
- Flexible portfolio - choose Tg, MW, acid/hydroxyl functionality to match your formulation needs
Typical Applications
DEGAGRYL® AC‑modified RHMs are the first choice for flat lamination, including:
- Sandwich composites: aluminum, FRP panels, foam, and wood‑based substrates (e.g., RV and transportation interiors)
- Honeycomb structures: doors and lightweight panels
- Foil‑laminated particleboard: for furniture components
- MDF panels: decorative surfaces and high‑gloss films
Flat Lamination Applications
The flat lamination technology is widely used for multilayer sandwich construction and surface lamination of lightweight materials with decorative films, which give them a solid or more valuable appearance. Core materials are mainly made from MDF fiber- board, particle- chipboard or plywood, cardboard or plastic foams while, plastic films, high gloss films, paper, HPL or veneers are typically used for surface layers.
For bonding large size panels, the adhesives need to provide low viscosity and long open times for sufficient wetting and long handling times. On the other hand, setting times should be short to allow for fast production runs. RHM formulations based on pure polyester-polyols with long open time often also have long setting times and, therefore, do not provide sufficient initial strength.
Why Choose DEGACRYL® AC?
By using DEGACRYL® AC polyacrylates inside the formulation of moisture curing hot melts, longer open times and higher initial strength are achieved. Additionally, their high molecular weight leads to excellent creep resistance of the adhesive, keeping bonded parts in place without the need for any further mechanical fixation.
Compared to pure polyester‑polyol RHMs, DEGACRYL® AC enables longer open times, higher initial strength, and significantly improved creep resistance, supporting fast production cycles with reliable in‑place bonding.
Open Time & Initial Strength:
Lab comparisons show that DEGACRYL® AC‑modified RHMs deliver long open times with shorter setting times and higher initial strength than pure polyester‑based RHMs - ideal for large panels and high‑throughput lines.
Creep Resistance:
The high molecular weight of DEGACRYL® AC grades contributes to excellent creep resistance, minimizing part movement and reducing the need for mechanical fixation during curing.
