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DESIGNING A POWDERED POLYMER FOR TILE ADHESIVE MORTARS: ROLE OF PVA MOLECULAR WEIGHT AND ANTI-CAKING SYSTEM ON MORTAR’S MECHANICAL PROPERTIES

DRY MIXTURES

699.822

Petit, J.-Y. new products development manager, Organik Kimya Netherlands B.V

Alitinform No3 (52) 2018 г. 42-52 p.

Abstract

With a world consumption of hundreds thousands tons per annum, latex redispersible powders are used in many technical mortars as secondary binder. In order to properly increase the mortars’ properties, the latex producers are investing a lot in their design, not only in terms of monomeric composition, but also in fine tuning the recipes taking into account the mechanism of latex enhancement of cement. While the monomers effects have been investigated and presented, this investigation aims at highlighting the effect of side components of the fabrication process, often not quoted but having their usefulness in the mortar.
This paper investigates the role of the molecular weight of polyvinyl alcohol and the effect of anti-caking system on performances of tile adhesive mortars. It is shown that while the former have a direct impact on rheology, the latter is of importance to enhance bond strength, independently of the technology in use. These two factors are key factors for the redispersible latex powder industry to offer tile adhesive manufacturers the proper product to improve their adhesive mortars.

Key words:

latex, anti-caking system, mortar, RDP, PVA

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