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High performance chemically resistant coatings for industrial flooring

18th April 2019

High performance chemically resistant coatings for industrial flooring

Epoxy coatings consist of two components that react with each other forming a durable protective coating. The Part A component is an epoxy resin, and the other component, Part B, is a hardener. The choice of hardener determines the final properties of protective coating like pot life, drying time, penetration and wetting ability. 

Epoxy resins are a very important class of thermosetting synthetic polymers, used in coatings, adhesives and composites. They are usually bisphenol A (Bis A) or bisphenol F (Bis F). By varying the composition of bisphenol we can obtain resins with various performing characteristics.
Hardeners are either amines or amides. Amine based hardeners are considered more durable and chemical resistant than amide based hardeners, but have a tendency to “blush” in moist conditions. Blushing is a reaction that occurs on actively curing epoxy, which is the result of a reaction between hardener and moisture in the air. This adverse reaction results in a layer on the surface, which gives the appearance of a cloudy waxy stain that is indelible.

Novolac Epoxy

Novolac epoxy coatings are developed by the reaction of modified bisphenol F resin and a hardener, which produces a tightly cross-linked network, resulting in the high-performance characteristics shown in the below benefits table. 

Key benefits of Novolac epoxy coatings

Health & Safety

VOC content is very low, below the requirements dictated by the Green Building Council of Australia. i.e. Green Star Office Design V2 IEQ-13 & Green Star Office Interiors V1.1 IEQ-11  

Chemical Resistance

Novolac epoxies achieve higher chemical resistance due to their chemistry.

Bonding Capability

Novolac epoxies have superior bonding characteristics as they bond both mechanically and chemically.

Higher Temperature Resistance

Novolac systems are able to endure much higher temperatures than typical bisphenol blended epoxy coatings.

 

Principal Usage of Novalac epoxy coatings

Designed to provide increased protection within the mining processing industry and other similar applications where high chemical resistance is required

Industrial flooring applications using Novolac epoxy

Fosroc ANZ offers high performance industrial floor coatings, including a Novolac epoxy solution, to protect substrates from aggressive action of spilled chemicals, which could attack or lower the pH of concrete, potentially exposing the reinforcement within the concrete, and thereby weakening the structure and ultimate strength of the concrete, and causing durability issues.

Fosroc Nitoflor N is an all-purpose, highly chemically resistant Novolac epoxy coating/toppings system, suitable for a number of surfaces including concrete, steel and masonry.

Products available in the Fosroc ANZ range to create a tailored industrial flooring solution where use of a Novolac epoxy is recommended:

Nitoflor N

100% solid novolac epoxy coating

Nitomortar 903

100% solid epoxy primer based on bisphenol A

F4 Fillers

Blend of various aggregates (silica sand)

Broadcast

Quartz sand#16/30

 

Applications options:

Trowel Floor using Novolac epoxy

Textured floor utilising Novolac epoxy for enhanced chemical characteristics

Coating Layers

Product

Thickness

Primer

Nitomortar  903

150 Microns (WFT)

Body coat

Nitoflor N+F4 fillers

5mm Trowelled finish

 

Nitoflor N trowel applied floor coating system

 

 

 

 

 

 

 

Trowel floor with clear coating using Novolac epoxy

This system to be used where surface requires enhance chemical resistance and cleanability.

Coating Layers

Product

Thickness

Clear Top coat  

Primer

Nitomortar  903

150 Microns (WFT)

 

Body coat

Nitoflor N+F4 fillers

5mm Trowelled finish

 

Top coat –Layer 1

Nitoflor N

200Microns (DFT)

Clear coating

Top coat –Layer 2

Nitoflor N

200Microns (DFT)

Clear coating

 

Trowel Floor with Clear coating using Novolac epoxy

 

 

 

 

 

 

 

 

 

Trowel floor with anti-slip characteristics using Novolac epoxy

This system to be used where the surface requires enhanced chemical resistance combined with aggregate to create a balance between slip resistance and ease of cleaning.

Coating Layers

Product

Thickness

Clear Top coat

Primer

Nitomortar  903

150 Microns (WFT)

 

Body coat

Nitoflor N+F4 fillers

5mm Trowelled

 

Top coat –Layer 1

Nitoflor N

200Microns (DFT)

Clear coating

Broadcast

Quartz sand#16/30

Broadcast to Refusal

 

Top coat –Layer 2

Nitoflor N

200Microns (DFT)

Clear coating

 

Trowel floor with anti-slip characteristics using Novolac epoxy

 

 

 

 

 

 

 

 

 

 

Novalac epoxy coatings offer excellent resistance to concentrated sulphuric acid, other strong acids as well as alkaline substances and many chemicals found in industrial environments.  When seeded or blended with aggregate, it can be used on properly prepared concrete substrate to provide excellent chemical resistant surface with skid resistance and wear characteristics.

For more information on Fosroc's Novolac epoxy, Nitoflor N, please contact your Account Manager, or call us on 1300 737 787.