kondensationsvernetzte

Kondensationsvernetzte is a German term that translates to "condensation-curing" in English. It refers to a type of chemical curing process where cross-linking of polymer chains occurs through the release of a small molecule, typically water or alcohol. This process is commonly employed in the formulation of various materials, most notably silicone elastomers and certain types of coatings.

In condensation-curing systems, a base polymer contains reactive functional groups. These groups react with a cross-linking agent, which also possesses reactive sites. During the curing reaction, these reactive sites combine, forming strong chemical bonds between the polymer chains and creating a three-dimensional network. As a byproduct of this bond formation, a small molecule such as water (H₂O) or an alcohol (ROH) is eliminated. This release of a volatile component is the defining characteristic of condensation curing.

This method is widely used for producing RTV (Room Temperature Vulcanizing) silicones. These materials are popular for their flexibility, durability, and resistance to temperature extremes and moisture. The condensation-curing process allows for the formation of a robust, elastomeric material at ambient temperatures, making it suitable for a wide range of applications including sealants, adhesives, coatings, and encapsulants in construction, electronics, and automotive industries. The rate of curing can be influenced by factors such as temperature, humidity, and the presence of catalysts.