Chemistry of adhesives.

The right choice of chemistry is a very critical point in adhesive bonding. Exotic & specially developed variations of the basic mechanisms often lead to an enormous advantage in the characteristics of the product.

In order to obtain a basic understanding of the product classifications, we will briefly explain the essential polymerisation mechanisms and the application as well as processing possibilities. We are happy to work with the customer to select the right type of adhesive depending on his process.

2C Methyl Methacrylate Adhesives (MMA)

Acrylic adhesives based on methyl methacrylate react via the initiation of a chain polymerisation process, for examples, by peroxides. In particular, they are characterized by very high strength, strong adhesion and extraordinary mechanical performance.

Advantages and typical material characteristics:

  • Excellent adhesion to many plastics (ABS, PC, etc.)
  • Very high impact strength over a wide temperature range (-40°C to 150°C)
  • Fast and adjustable curing (pot life: 1 – 15 min)
  • Free of toxic peroxides, accelerators and methacrylic acid

2C Methacrylate Adhesives (MA)

Our MMA-free methacrylate adhesives form a large property intersection to the MMA adhesives, but without the typical smell of MMA.

Advantages and typical material characteristics:

  • Excellent adhesion to metals and magnets
  • Very high impact strength over a wide temperature range (-40°C to 150°C)
  • Fast and adjustable curing (pot life: 1 – 15 min)
  • Free of toxic peroxides, accelerators and methacrylic acid

UV Acrylic Adhesives (UV)

UV adhesives reract via chain polymerisation of an acrylate initiated by UV light. The reaction is characterized by an enormously fast bonding formation or rather curing. UV adhesives have extraordinary processing advantages and represent an ideal basis for bonding glass to a wide variety of materials because of their good adhesion and transparency (e.g. glass, metal, ceramics, plastics, etc.).

Advantages and typical material characteristics:

  • Years of experience in development and special know-how
  • Excellent adhesion and long-term moisture resistance
  • Exceptional optical clarity
  • Available with dual curing (moisture curing as 2nd mechanism)

2C Epoxy Resin Adhesives (EP)

Epoxy resin adhesives react via a polyaddition starting from a multifunctional epoxy and hardener to the polymer. Amines or anhydrides are usually used as nucleophilic hardeners. Besides a wide range of adhesives, special applications such as optical coatings or ceramics are also possible.

Advantages and typical material characteristics:

  • Special formulation know-how and high degree of adaption
  • Very good chemical resistance
  • Adhesives with very high TG and thus very high temperature resistance

1C Epoxy Resin Adhesives (EP)

For the one-component version of these adhesives, the resin and hardener are no longer separated and only become active or reactive when heated. These adhesives are only stored for a limited time at room temperature or have to be refrigerated.

The material advantages of the 1C versions do not differ from the 2C versions. Especially for the anhydride-formula applies:

  • Highest chemical and temperature resistance (up to 200°C)
  • Ideal chemical basis for magnetic bonding in electric engines

2C Silane-modified Adhesives (SMA/MS)

Silane-modified adhesives combine the properties of silicones and polyurethanes. Special know-how is needed in the proper use of various functional molecular intermediate structures.

Advantages and typical material characteristics:

  • Very strong performance at low temperatures, very elastic with excellent adhesion from -40°C to +120°C
  • No change in Young’s modulus over a range of -40°C to 23°C
  • Excellent moisture resistance & good adhesion even to plastics or other material with poor bonding attributes

2C Polyurethane Adhesives (PU)

Polyurethanes are the polyaddition product of multifunctional isocyanates and polyols. The challenge here is the difficult selection of physiologically uncritical monomers and the moisture sensitivity during the curing process.

Advantages and typical material characteristics:

  • Wide range of adjustable mechanical properties – from elastic to hard
  • Very good temperature performance, even at minus temperatures
  • Special know-how: Coatings with excellent UV stability

Physically bonding adhesives (WBA)

Physically bonding adhesives do not create a gluing joint through a reaction. The bond to the components is formed when the solvent is aired out (solvent-based adhesives) or when the adhesive is heated (hot-melt adhesives).

Although chemically binding adhesives are our core business, we also develop and supply contact adhesives and dispersion adhesives for various applications in the automotive industry.