RAHN offers a comprehensive portfolio of high-performance co-resins designed to enhance coatings, inks, adhesives, and advanced industrial formulations. Our specialty co-resins are engineered to optimise key properties such as adhesion, pigment wetting, flexibility, gloss and curing performance across a wide range of applications.

FAQ on Co-Resins

Which applications mainly use co-resins?

Co-resins are used in formulations to increase the performance of primary oligomers, when used alone. Typical applications include:

• Screen Inks 
• Flexo Inks 
• Offset Inks 
• Industrial coatings, especially on plastics 
• Pressure sensitive adhesives
   

How do co-resins influence these systems?

By adding a Co-resins to a given formulation, the following properties are influenced:

• Adhesion capability on different substrates 
• Crosslink density and network structure pigment wetting 
• Cure speed and productivity
• Flexibility of the overall system
• Mechanical and thermal performance 
• Offset ink behaviour 

By participating in or modifying the crosslinking process, co-resins help tailor the final polymer network architecture, which directly determines properties such as adhesion and flexibility. 
 

How are co-resins used in coatings?

In coatings, co-resins function as part of the binder matrix, interacting with oligomers and  monomers. They are used in several UV-curable industrial and protective coatings, wood and plastic coatings.  Their role includes:

• Control film shrinkage 
• Improve adhesion

During curing, the binder undergoes crosslinking to form a three-dimensional polymer network, which determines mechanical strength, adhesion, and chemical resistance.
 

What role do co-resins play in printing inks?

Co-resins are critical in printing ink formulations, where they enhance: 

• Pigment binding, wetting and dispersion
• Adhesion to substrates (e.g. paper, plastics) 
• Print quality and gloss