Publication Date:
2020-02-12
Description:
Powdered calcium carbonates from natural sources are being widely used as fillers in adhesive systems to improve processing and in service performance characteristics. The converting of limestone and marble to adhesive filler materials typically includes grinding and in some cases precipitation and coating to adjust particle size, processability and chemical reaction with the adhesive. It has been frequently observed that calcium carbonate powder batches with apparently similar particle-specific characteristics (e. g. density, chemical composition and particle size distribution) may exhibit significantly varying processing properties in terms of their effect on rheology, curing and adhesive performance of the adhesives formulation. This indicates that different calcium carbonates as raw materials for fillers obviously feature intrinsic characteristics which have not yet been identified and examined sufficiently and whose effect on the processing and product characteristics of highly filled reactive adhesive systems is essential to achieve a sufficient level of process stability, batch-to-batch reproducibility and last not least uniform product quality. The aim of this research project therefore is to reveal the structure-property- relationship between the manifold calcium carbonate particle characteristics on one hand and the physicochemical and technical properties of the resulting adhesives formulation on the other hand.
Language:
English
Type:
info:eu-repo/semantics/conferenceObject
Format:
application/pdf
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