Floor coating compositions

Abstract

The invention relates to the use of Real Michael Addition (RMA) crosslinkable composition for the preparation of a floor coating, to special RMA crosslinkable compositions with long working time and very short service time and low VOC and to specific floor compositions, in particular for use in high build floor coating applications.

Description

[0001]The invention relates to floor coating compositions and in particular synthetic resin floorings. In particular it relates to the use of RMA crosslinkable compositions in floor coating compositions, to special RMA crosslinkable compositions, to special resins for use in said floor coating compositions, to floor coating compositions and the processes for making a floor coating using said floor coating compositions.[0002]Floor coating compositions are used to improve appearance and protect the substrate floor mostly from chemical or mechanical exposure. The chemical and mechanical resistance requirements are typically much higher than for paints on other surfaces.[0003]Synthetic resin floorings are being defined as a mixture of synthetic resin and particles (optionally pigments) that hardens on curing by means of chemical reactions. Synthetic resin floorings are applied in-situ to a substrate surface, for example a direct finished concrete slab or fine concrete screed.[0004]Concr...

AI Technical Summary

Benefits of technology

The patent text describes a floor coating composition that improves appearance and protects the floor from chemical or mechanical exposure. The composition has different types and thicknesses depending on the requirements. It can be applied directly to new concrete without the need for a sealer coating layer, which reduces cost but takes longer to finalize. The technical effect of the patent text is to provide a versatile and cost-effective floor coating composition that improves appearance and provides a high level of chemical and mechanical resistance.

Problems solved by technology

Concrete wearing surfaces can give satisfactory service under many industrial conditions but become less effective where there are specific requirements of chemical resistance, hygiene, cleanliness, resistance to high impact or abrasion.

Although these resin systems have their merits, they also pose some important limitations as they use chemicals that have toxicological profiles that are questionable (bisphenol A / F in epoxy resins, amine curing agents, monomeric diisocyanate in polyisocyanate hardeners).

The balance between working time and the time before service is a difficult one as both epoxy-amine and polyol-polyisocyanate systems will start reacting chemically already in the liquid state directly after mixing.

This implies that the viscosity of the mixed liquid resin flooring will start to increase, reducing the fluidity and the ability of the resin flooring to flow and level.

This difficult balance is exacerbated by the presence of fillers in particular when the amount of filler is high, as is often the case.

There is a great desire to shorten these times. However, all measures that are taken to shorten the time before service, such as the addition of extra catalysts will have also a detrimental effect on the working time.

Especially for floorings based on polyol-polyisocyanate, humidity is critical as water can react with the polyisocyanate, generating carbon dioxide gas that can cause foaming and blistering.

Epoxy-amine floor coating systems have a further disadvantage that they typically cannot be cured at temperatures below 15° C. Too low curing temperature will result in poor mechanical properties of the cured coating.

A further disadvantage of polyol-polyisocyanate floor coating systems is that, during the application, they are moisture sensitive.

Therefore both prior art floor coating systems have particular significant disadvantages for application in outdoor floor applications where low temperatures and moist conditions frequently occur.