Ms Marie-Anaïs Caquant
Adhesives, Caulks and Sealants S&T Development Manager
Marie-Anaïs Caquant obtained her chemical engineering degree from the École Nationale de Chimie, Physique et Biologie de Paris. She joined Imerys as the Science and Technology development manager for adhesives, caulks and sealant (ACS) in 2022 continuing her experience in the field from her previous work with Bostik, France. By following market trends and working in collaboration with customers, she works on developing new mineral solutions for ACS as well as providing technical support.
Moisture management in sealants - a natural approach
Moisture is a key topic for adhesive & sealant formulators in moisture-curing systems. Fillers, and most often calcium carbonates (CaCO3) can be a principal contributor of water in a 1-component sealant. Precipitated Calcium Carbonate (PCC) is added to modify their rheological behavior and will significantly improve their bond strength. However, due to the inherent moisture found in PCCs, sealant producers either employ an extra drying step or add a moisture scavenger, such as VTMO, at levels typically above 2%.
Imerys has recently developed a new ultrafine PCC (UF PCC) with a very low and constant moisture content. Without the need for drying, its use improves the storage stability of the final product whilst allowing a reduction in the moisture scavenger to < 1%. In this paper we describe the development and use of this novel PCC in a moisture sensitive sealant and demonstrate its effectiveness in reducing energy consumption and/or chemical addition.
Thursday, 14 September 2023, 17:00 - 17:30