Intumescent polymer metal laminates for fire protection ncbi. Nonhazardous, nontoxic, noncarcinogenic formulation. An intumescent system is a combination of various compounds that in the event of fire react together as a result of the temperature increase to form a carbon foam. This product works on many types of surfaces that require a clear, flat flameretardant coating. Flameoff intumescent paintlike coatings are typically applied by pressure spray system, the product is waterbased, nontoxic. Investigation of intumescent coatings for fire protection. Our company is very interested in getting information about an intumescent solventbased coating for steel formulation based on ammonium polyphosphate exolit ap422. The fire resistance of various formulations was evaluated using the standard vertical bunsen. When compared to unreinforced coating, formulation s615 significantly reduced steel temperature at approximately 34. They need to perform all of the functions that other exterior weathering coatings do adhesion, hardness, toughness, corrosion resistance, etc. They are the least expensive and produce less odour. Intumescent flameretardant coating ifrc provides a protective. Quantification of thermal barrier efficiency of intumescent.
Pyrolysis mechanism of intumescent fire retardant coating. The results showed that intumescent coating reinforced with cwf produced better fire resistance performance. Development and testing of intumescent fire retardant coating on. The key factors in the intumescent formulations, binders, flame retardants. The first peak is due to ignition and burning of the binder resin of the coating formulation. The development of novel latexes for fireresistant. An chemical reaction at about 350f builds up an insulating char that protects the underlying material from the heat. Wt103 is a class b interior, intumescent, latex, clear, flat coating. Also critical to the formulation of an intumescent coating is titanium dioxide tio2, which not only provides the usual properties of color and opacity, but also takes. Formulation of intumescent coating optimized formulations. Epoxy intumescent coating systems for fire protection introduction the first epoxy intumescent coatings for passive fire protection were developed over 30 years ago. An overview of intumescent coatings american coatings.
Hence, their formulation, distribution, and quality performance are contro. Depending on the coating thickness, this process repeats itself several times. Intumescent coatings performance of intumescent fire. Opaque or white in color, intumescent coatings provide siteapplied fire protection to various substrates in accordance with our evaluation report, er 305 and other evaluation reports containing noburn, inc. This specification section covers only intumescent fireproofing associated with the fire protection of structural steel members. The formulation of the coating is a key to its ability to improve flame retardance. These putties are similar in consistency to the playdough used as childrens toys.
Solventbased or solventfree epoxy materials are used to formulate. Novel testing to study the performance of intumescent. Moreover, an intumescent coating, according to sspcs definition, is a fireretardant coating that when heated forms a foam produced by nonflammable gases, such as carbon dioxide and ammonia. The first part of this project is to synthesize the waterbased intumescent paint using a highspeed disperse mixer for 30 min at room temperature until it is completely homogenous. Study on preparation and fireretardant mechanism analysis. Most intumescent coatings contain three main ingredients. Intumescent paint professional intumescent coatings for australian and international businesses.
Solventbased acrylic materials are used to formulate intumescent coatings for use in internal or sheltered external locations. Reactive coating materials like intumescent coatings are highly technical. Jul 24, 2017 intumescent coating is a layer of protective substance which works by chemical reaction generated by heat, resulting in swelling and formation of an insulating layer on the surface, with or without release of water. Use of software to facilitate intumescent fireretardant coatings for. Jun 01, 2004 significant early water resistance improvement of intumescent coating can be obtained with the experimental latexes. This foam attains a thickness of 10 to 100 times of the originally applied coating and insulates the substrate material through its low thermal conductivity. We test two different cable coatings, our fs coating and a coating from another manufacturer. The results of influence of glass fiber addition into the basic intumescent coating formulation towards the enhancement of its thermal insulation properties are presented. Aug 31, 2011 if youve searched for any type of passive fire protection or petroleum facility fireproofing lately, you likely found a good amount of information about fireretardant intumescent coating systems, but very few sites actually answer three common questions. Flameoffs intumescent products are fully leed accredited. Cj coatings nationwide has an established team of on site spraying and cladding panel contractors that specialise in intumescent coatings and firesafe cladding spraying. And the curves of tga were disposed by ta universal analysis software.
Intumescent coatings are exceedingly complex coating materials. Intumescent flameretardant coating ifrc provides a protective barrier to heat and mass transfer for the most efficient utilization of a wide variety of passive fire protection systems at the recent development. These ingredients are moisture sensitive and alongside careful formulation it is also. Study on preparation and fireretardant mechanism analysis of. Fractal conceptualization of intumescent fire barriers. Improved pyrolysis behavior of ammonium polyphosphate.
Thermal stability of the intumescent formulations9 iii. Into chemicals offers a high quality range of flame retardant additives for your intumescent coatings, developed in close collaboration with our manufacturers and perfectly suitable for most water and solvent borne intumescent coating formulations. Fireprotective and flameretardant coatings a state. Spec 7 insulation works with builders and contractors to install highquality intumescent coating for residential new construction projects. As the fire continues, the ash coating erodes, exposing the remaining intumescent coating to form more char. Intumescent coatings, or intumescent paint, can be used as a passive fire resistance measure and also be applied to structural members as an aesthetically pleasing fireproofing product. The coating composition is curable to a solid state by free radical polymerization. Sometimes, the intumescent coating is reinforced with epoxy resins with mixtures of boric acid or borates, glass and lime. All information provided is for guidance only, and as intumescent. An intumescent flameretardant coating was prepared by unsaturated polyester resin and epoxy resin as twocomponent matrix resins, ammonium polyphosphate app as acid source, melamine mel as the blowing agent and pentaerythritol per as carbon agent, expandable graphite as synergistic agent, adding titanium dioxide tio 2, solvent and other assistants. Preparation of intumescent fire protective coating for fire. Development of an epoxy based intumescent system comprising. The paint product is applied to the steel in layers as needed to generate the thickness that corresponds to the level of protection mandated by the building code. Specifications for other purposes, such as, but not limited to, section 01 40 00 quality assurance, section 05 51 00 structural steel, section 07 81 16 cementitious fireproofing and section 09 90 00 painting and coatings must.
A liquid intumescent resin coating composition including at least one polymeric component, at least one ethylenically unsaturated monomeric component, and at least one intumescent ingredient. Tg, dtg, and dsc analyses were obtained by using origin software 8. If youve searched for any type of passive fire protection or petroleum facility fireproofing lately, you likely found a good amount of information about fireretardant intumescent coating systems, but very few sites actually answer three common questions. As far as we know, this type of coating has never been evaluated for the fire protection of composites while exhibiting numerous advantages compared to. Intumescent fireproofing fire protection coatings fire. Intumescent fire resistive coating thickness measurement. The coating composition further includes at least one of sodium potassium aluminum silicate nepheline syenite and potassium aluminum silicate. The thicker the application layer is, the longer it provides protection in a fire. Effect of binder on performance of intumescent coatings. Our company is very interested in getting information about an intumescent solventbased coating for steel formulation based on ammonium polyphosphate exolit ap750. Free floating carbon mesh embedded in the coating is used to reinforce the coating. Use of software to facilitate intumescent fireretardant coatings for structural steelworkss formulation article december 2011 with 7 reads how we measure reads. This movement applies not only to the physical structure of the building but to the buildings furnishings and decorative elements as well. We offer tried and tested intumescent coatings and fireproof cladding spraying to ensure modern buildings remain safe and meet the necessary health and safety requirements.
In the meantime, the intumescent reactions are activated and char is formed, which suppresses the burning of underlying laminate, resulting in a slow increase in hrr. Intumescent paint is a passive fire resistance coating that expands up to 50 times the original thickness when exposed to fire. Our company is very interested in getting information about an intumescent solventbased coating for steel formulation based. What are the benefits and drawbacks of using intumescent. The data tco, tco2, tsv and thr were computed using a homedeveloped software. Since 911 there has been renewed interest in improving the fire safety of buildings. Waterbased acrylic materials are formulated for use in mainly dry, internal locations.
What are intumescent coatings and how do they work. Putties of this nature also lend themselves to use as pads covering electrical outlet boxes inside drywall assemblies required to have a fireresistance rating. Action alliance prides itself on being one of the only fully trained and accredited companies in melbourne to provide intumescent coatings for fireproofing a range of structures. Mechanism of degradation of intumescent formulation 2 142 iii. App, per, and mel were used as flameretardant additives. Significant early water resistance improvement of intumescent coating can be obtained with the experimental latexes.
Intumescent coatings can swell up by a factor of 100 on heating from 1mm to 10 cm thick foam. The present invention further reveals an intumescent coating which is. Intumescent coatings intumescent fireproofing thin. Pipe covered with a thinfilm intumescent spray fireproofing commercial product called unitherm. Optionally, the carbon mesh may be used in conjunction with mechanically attached reinforcements. Fire performance, microstructure and thermal degradation. Pdf impact of the intumescent formulation of styrene acrylicbased. Intumescent silicone based coatings for the fire protection. The combinations of additives, such as, for formulating an intumescent. Intumescent paint provides the same level of protection in a coating that looks like a thin layer of paint. The unforgettable events that occurred at the grenfell tower block in 2017 are enough evidence of that.
The cafco sprayfilm isolatek type wb product line allows designers and architects to obtain a smooth, aesthetically pleasing and durable finish, along with the required fire protection, while allowing them to realize their visions in steel. Intumescent coating is a layer of protective substance which works by chemical reaction generated by heat, resulting in swelling and formation of an insulating layer on the surface, with or without release of water. It is intended to centre our research investigations on a waterbased intumescent coating available on the u. The word intumescent means to swell up, and in a fire, intumescent coatings form a carbon foamlike char, becoming an insulated layer that protects steel and a facilitys assets and critical infrastructure. Intumescent coatings are opaque and visibly distinguishable when applied to the substrate. Recent developments of intumescent fire protection. This reaction results in a thick, highly insulating layer of carbon about 50 times as thick as the original coating that serves to protect the coated substrate from fire. Intumescent paints are specially formulated reactive coatings designed to. High rise buildings and outdated materials are susceptible to fire damages and can quickly burn out of control. Fire resistance properties of ceramic wool fiber reinforced. These intumescent formulations significantly enhanced the fire retardancy of painted plywood. Intumescent putty, permanently pliable, used in a cable penetration firestop. This demonstration includes intumescent fireproofing materials in the cable coating. Effect of binder on performance of intumescent coatings joana t.
The need for fireproof cladding coatings are currently well documented in the uk. The intumescent coatings were formulated from expandable graphite, ammonium polyphosphate, melamine, boric acid, bisphenol a epoxy resin be188, polyamide amine h2310. Preparation of intumescent fire protective coating for. A top coat keeps a coating looking at its best and ensures the full life of a coating is reached. A reinforcement system for mastic intumescent fire protection coatings. Cap coatings intumescent paint also known as intumescent coating, fire paint, fire rated paint, fire retardant paint, fire proof paint expands into an insulating char up to 50mm thick during a fire situation, protecting the. Application over wood, fiberboard, plasterboard, cardboard, foliage and other decorative surfaces. Apart from the chemical formulation, the substrate boundary conditions, the applied coating thickness, the heating conditions and the fire. Use of software to facilitate intumescent fireretardant. As far as we know, this type of coating has never been evaluated for the fire protection of composites while exhibiting numerous advantages compared to the conventional organic intumescent paints.
Novel testing to study the performance of intumescent coatings under nonstandard heating regimes angus elliott, alistair temple, cristian maluk, and luke bisby school of engineering university of edinburgh the kings buildings, mayfield road edinburgh, uk eh93jl abstract. Recent developments of intumescent fire protection coatings. New waterbased binder for durable thin film intumescent coatings. The proposed characterization methodology was applied on two different intumescent systems. Waterborne versions are growing in importance for environmental reasons. Study on preparation and fireretardant mechanism analysis of intumescent flameretardant coatings. By applying a multivariate design for the screening experiments, many intumescent fire retardants. The exolit ap products used are fine, white powders based on ammonium polyphosphate. The formulations of intumescent coatings are tabulated in table 1. They have become more accepted and more commonly used in recent years due to continued improvement in formulation, application and performance. A copolymer for the use in or as polymeric binder in intumescent coatings. The most common type of intumescent coatings used in the uk are waterbased intumescent coatings.
Intumescent paints prolong the time in which people are able to evacuate public places such as houses, airports, hospitals and sports arenas. The effective applicability of intumescent coatings requires relatively low shear viscosity values especially considering that an intumescent formulation needs to be a coating formulation requiring either spraying or the spreadability of the formulation via a paint film applicator or a doctor blade, etc. Tc02, tsv and thr were computed using a homedeveloped software. Interest in intumescent paints has grown rapidly in recent years due to increased demand from insurance companies and legislation. Cap intumescent paint systems deliver cost effective, tested and approved non destructive fire rated coating solutions. Intumescent paint works as an active fire protecting surface treatment which is activated at 150200c. Ingredients of intumescent coating formulations wt. This article highlights the fireresistance, physical, chemical, mechanical, and thermal properties of the ifrc using a bunsen burner, furnace, scanning electron microscope, freeze. According to troitzsch, formulations with ammonium polyphosphate or melamine phosphate perform better regarding water resistance. Waterbased intumescent coatings are suitable for cellulosic type fires. Isolatek internationals family of thin film waterbased intumescent coatings provides designers the flexibility to showcase exposed structural steel. Interchar single pack water borne intumescent coatings. All information provided is for guidance only, and as. One solution is the adoption of a waterproof coating over the intumescent paint.
This paper presents a uniform design methodology for computer assisted experimental design for intumescent fire retardant coating ifrc formulations, exemplifies the benefits of using experimental design together with software to facilitate the formulation of an ifrc for structural steelworks. Use of the cone calorimeter and conetools software for. Figure 10 shows the results for an intumescent coating prepared with latex e, applied to a steel substrate and dried for 36 hours, after 24 hours water immersion, compared to a coating based on pva copolymer of the same formulation. In this study, red mud rm, an oxide waste was proposed as reinforcing, synergistic filler for the traditional epoxy intumescent coating ic. This is an innovative coating technology which uses char formation to prevent fire spread. This paper will address intumescent technology for. The combinations of additives such as for formulating an intumescent coating can often.