Silanes in Coatings & Inks
Silanes can be used flexibly and effectively in many application areas. This report reveals how silanes can be used in the Coatings & Inks segment, and what advantages they bring with them.
In coatings and inks, silanes are preferably used as crosslinkers, adhesion promoter, coupling reagents, or dispersing agents. The functional group (FG) on the head end of the silane is selected for its ability to react with the resin or plastic. The FG can be, for example, an amino, epoxy, methacryloxy, or vinyl group. In a first step, the molecule end around the silane group hydrolyses with moisture from the air. This is followed by a second reaction, which is condensation. In this step, several silanols either bond together with each other to form a three-dimensional network (see crosslinkers) or undergo condensation with the filler or substrate to be coated (see the other three functions). In the latter case, they form a two-dimensional network.
Below are the modes of action and advantages for each function:
- Create a new network structure in the polymer
- Increase strength and hardness
- Increase the life span of the product
- Increase temperature resistance
- Increase scrub and scratch resistance
- Improve adhesive performance between the resin and substrate
- Enhance corrosion resistance
- Avoid corrosion propagation from cracks
- Combine the filler and resin into one system
- Optimize the strength of composite materials
- Allow an increase in filler content
- Improve dispersion of the filler in the resin
Our product recommendations for coatings & inks:
|Function||When to add||Recommended products|
|Crosslinkers||Add to polymerization||LT-151* / LT-171 / LT-570|
|Add afterwards||LT-560 / LT-563*|
|Adhesion modifiers||LT-540 / LT-550 / LT-560 / LT-563* / LT-792|
|Coupling reagents/ dispersants||Add to polymerization||LT-540 / LT-550 / LT-560 / LT-563* / LT-792|
*Currently no REACH.
We are always at your service for further consultation or to answer any questions, including of course any enquiries about other applications such as adhesives or compounds.