Dr Andrea Battisti
Application Manager Adhesives & Sealants
Omya International AG
Dr Andrea Battisti is Application Manager Adhesives & Sealants at Omya Interna-tional, globally responsible of technical support and innovation of calcium car-bonates for Adhesives and Sealants. His expertise is particle surface engineering to enhance the final composite material properties. He gained his PhD in 2010 with a work on nanoparticles in polymeric materials and since then he has been leading innovation projects on the improvement of the mechanical and application proper-ties of materials in both academy and industry.
Efficient processing with low moisture calcium carbonates
This is the first of a series of three papers on the science of Calcium Carbonate in Adhesives and Sealants. Following publications will tackle the fundamental of rheological modification and mechanical reinforcement.
Calcium carbonates is the most used filler in Adhesives and Sealants. While coarse products (extenders) are essentially aimed at cost reduction, fine and treat-ed products (functional fillers) offer added functionalities such as mechanical rein-forcement and rheological modification.
When micrometric and submicrometric products are used in moisture curing and moisture sensitive systems, the amount of water carried into the systems by the functional fillers need to be taken in consideration. To prevent variability of product quality and performance of Adhesives and Sealants, costly corrective measures include: filler pre-drying, long mixing time under vacuum, heating/cooling, chemical drying.
Given the economical and operational relevance of moisture in Calcium Carbonate fillers, it is important for the formulator and the production engineer to understand the root cause of the problem. This paper will describe the fundamental behavior of Calcium Carbonate in relation with environmental humidity. We first describe the mechanism using model systems and then expand to interpret real-world produc-tion condition. The fundamentals of surface treatment, a common mitigation tech-nology, will be presented. We will then outline advanced process and material en-gineering solutions. Finally, we will give an overview of the industrial relevance of the phenomena, supported by a separate set of case studies.
Thursday, 12 September 2019, 17:00 - 17:30