High performance chemically resistant coatings for industrial flooring
18th April 2019
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:
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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 |
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 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 |
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 0800 657 156.
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