INTUMISCENT COATINGS

Intumiscent coatings, is a powerful synthetic biocide and preservative within the group of  isothiazolinones.
Intumiscent coatings is used to control slime-forming bacteria, fungi, and algae in pulp/paper mills, cooling water systems, oil field operations, industrial process waters, and air washer systems. 
Intumiscent coatings is incorporated into adhesives, coatings, fuels, metal working fluids, resin emulsions, paints, and various other specialty industrial products as a preservative. 

CAS Number: 2682-20-4
Molecular Formula: C4H5NOS
Molecular Weight: 115.15
EINECS Number: 220-239-6

Synonyms: 2-Methyl-4-isothiazolin-3-one, 2682-20-4, Methylisothiazolinone, 2-Methyl-3(2H)-isothiazolone, 2-methylisothiazol-3(2h)-one, 2-Methyl-4-isothiazoline-3-one, 3(2H)-Isothiazolone, 2-methyl-, N-Methyl-3-oxodihydroisothiazole, N-METHYL-3-OXODIHYDRO ISOTHIAZOLE, 2-methyl-3-isothiazolone, 2-METHYL-2H-ISOTHIAZOL-3-ONE, MIT, 2-methyl-1,2-thiazol-3(2H)-one, 229D0E1QFA, DTXSID2034259, CHEBI:53620, 2682-20-4 (free base), MFCD01742315, Neolone, Caswell No. 572A, Microcare MT, Kordek MLX, EINECS 220-239-6, MIT (biocide), Acticide M 10, Acticide M 20, Bestcide 600, Kordek 50, Kordek 50C, 2-methyl-1,2-thiazol-3-one, Kordek 573F, Kathon CG 243, n-methylisothiazolin-3-one, UNII-229D0E1QFA, Neolone 950; 2-Methyl-4-isothiazolin-3-one; 2-Methylisothiazol-3-one, HSDB 8200, MIT 950, MT 10, 2-Methyl-4-isothiazoline-3-ketone, KB 838, 2-Methyl-4-isothiazolin-3-one (MI), 2-methyl-4-isothiazolinone, SCHEMBL17863, SCHEMBL113898, Methylisothiazolinone free base, CHEMBL1620780, DTXCID0014259, METHYLISOTHIAZOLINONE [II], METHYLISOTHIAZOLINONE [MI], 2-Methyl-4-isothiazolin-3-one 100 microg/mL in Acetonitrile, 2-Methyl-3(2H)-isothiazolone #, METHYLISOTHIAZOLINONE [VANDF], Tox21_303814, BBL104136, METHYLISOTHIAZOLINONE [MART.], STL557951, AKOS007930246, AM84857, CS-W011236, HY-W010520, 2-Methyl-4-isothiazolin-3-one, 95%, NCGC00357093-01, CAS-2682-20-4, 2-methyl-2,3-dihydro-1,2-thiazol-3-one, DB-005250, NS00003875, F21330, EN300-1708622, Q423870, 2-Methyl-4-isothiazolin-3-one, analytical standard, W-107150, Z3227502095

Intumiscent coatings is also used to control the growth of mold, mildew, and sapstain on wood products. 
Intumiscent coatings is generally recommended for use only in rinse-off and leave-on cosmetic products (maximum concentration of 100 ppm) as preservative such as shampoo, conditioner, hair color, body wash, lotion, sunscreen, mascara, shaving cream, baby lotion, baby shampoo, hairspray, makeup remover, liquid soaps, and detergents. 
Nevertheless, methylisothiazolinone is allergenic. 

Intumiscent coatings is reported that methylisothiazolinone in rinse-off products causes allergic contact dermatitis.
Intumiscent coatings is an isothiazolinone-derived biocide used for controlling microbial growth in industrial and household products, often in a mixture with 5-chloro-2-methyl-3-isothiazolone (MCI). 
Intumiscent coatings is active against Gram-positive and Gram-negative bacteria, fungi, and yeast with MIC values of 0.0045, 0.0015, >0.01, and 0.0065% (w/w) for S. aureus, P. aeruginosa, A. niger, and C. albicans, respectively, when used alone. 

Intumiscent coatings values are 7 to 200-fold lower when MI is used in combination with MCI. 
Intumiscent coatings decreases neurite outgrowth of rat cortical neurons when used at concentrations of 0.1-3 μM and inhibits Src family kinases in cell-free assays. 
Intumiscent coatings, alone and as a mixture with MCI, can elicit contact sensitization.

Intumiscent coatings is a colorless,clear liquid with amild odor that is completely soluble in water; mostly soluble in acetonitrile, methanol, and hexane; and slightly soluble in xylene. 
Intumiscent coatings is a heterocyclic organic compound used as a preservative in cosmetics and personal care products in concentrations up to 0.01%.
Intumiscent coatings is a 1,2-thazole that is 4-isothiazolin-3-one bearing a methyl group on the nitrogen atom. 

Intumiscent coatings is a powerful biocide and preservative and is the minor active ingredient in the commercial product Kathon(TM). 
Intumiscent coatings has a role as an antifouling biocide, an antimicrobial agent and an antifungal agent.
Intumiscent coatings paints are considered the lightest form of passive fire protection. 

An Intumiscent coatings is a coating that, when exposed to heat, is rapidly transformed through sublimation, and expands many times its original thickness (up to 100 times), to form a stable, carbonaceous char.
The resultant char reduces the conduction of heat from the fire to the substrate, delaying the time it takes to reach structural failure. 
This carbonaceous char must have the ability to remain in situ during any movement of the steel, such as expansion or deflection, until the required protection criteria is achieved.

Intumiscent coatings paints are typically applied using airless spray paint equipment for speed and quality of finish, whilst some brands might require large plural spray equipment, although brush and roller applications may also be used. Depending on the project specification, which is usually up to 120 minutes, the vast majority of the Intumiscent coatings materials in the market would need several coatings to be applied in order to reach the required dry film thickness to protect the structure from failure.
Intumiscent coatings is a substance that swells as a result of heat exposure, leading to an increase in volume and decrease in density. 

Intumiscent coatings refers to the process of swelling.
Intumiscent coatings materials are typically used in passive fire protection and require listing, approval, and compliance in their installed configurations in order to comply with the national building codes and laws.
The details for individual building parts are specified in technical standards which are compiled and published by national or international standardization bodies like the British Standards Institute (BSI), the German Institute for Standardization (DIN), the American Society for Testing and Materials (ASTM) or the International Organization for Standardization (ISO).

Intumiscent coatings are fire protection coatings that swell and expand when exposed to high temperatures, forming a layer of carbonaceous char. 
This char insulates and shields the underlying substrate (such as steel or wood) from fire, thus delaying its ignition or slowing down its spread.
Applied in relatively thin layers, these coatings are used where aesthetics and minimal thickness are important, such as in commercial buildings and residential settings.
Thick-Film Intumescent Coatings:

These coatings are thicker and provide higher levels of fire protection. 
They are commonly used in industrial environments, such as oil refineries, chemical plants, and heavy manufacturing facilities.
Intumiscent coatings use acrylic binders and are known for their durability and weather resistance. 

They are suitable for both indoor and outdoor applications.
Epoxy-based intumescent coatings offer excellent adhesion and chemical resistance. 
They are often used in aggressive environments where corrosion protection and fire resistance are critical.

These coatings are environmentally friendly and have low VOC (Volatile Organic Compound) content. 
They are suitable for applications where odor and emissions need to be minimized.
Applied to structural steel beams, columns, and other components in buildings to prevent structural failure during a fire.

Intumiscent coatings is used on wooden surfaces such as doors, panels, and partitions to improve fire resistance in residential and commercial buildings.
Applied to pipes and ductwork to maintain the integrity of fire barriers in buildings and industrial facilities.

Intumiscent coatings s used in trains, buses, and airplanes to protect passengers and prevent fire propagation in transport vehicles.
Intumiscent coatings can provide fire resistance ratings ranging from 30 minutes up to several hours, depending on the thickness and formulation.

Melting point: 254-256 °C(lit.)
Boiling point: bp0.03 93°
Density: 1.25 (14% aq.)
vapor pressure: <0.1 mm Hg ( 25 °C)
storage temp.: 2-8°C
solubility: Chloroform, Ethyl Acetate
pka: -2.03±0.20(Predicted)
color: Yellow
Water Solubility: 489g/L at 20℃
BRN: 606203
InChIKey: BEGLCMHJXHIJLR-UHFFFAOYSA-N
LogP: -0.486 at 20℃

Water-based intumescent coatings are a generally more eco-friendly, and less-chemically smelling option. 
They are the least expensive and produce less odour, however, these coatings are less tolerant to humidity and low temperatures and therefore may take longer to completely dry in such environments.
Intumiscent coatings are considered the lightest form of passive fire protection. 

An intumescent is a coating that, when exposed to heat, is rapidly transformed through sublimation, and expands many times its original thickness (up to 100 times), to form a stable, carbonaceous char.
The resultant char reduces the conduction of heat from the fire to the substrate, delaying the time it takes to reach structural failure. 
This carbonaceous char must have the ability to remain in situ during any movement of the steel, such as expansion or deflection, until the required protection criteria is achieved.

Intumiscent coatings are typically applied using airless spray paint equipment for speed and quality of finish, whilst some brands might require large plural spray equipment, although brush and roller applications may also be used. Depending on the project specification, usually up to 120 minutes, the vast majority of the intumescent materials in the market would need several coatings to be applied in order to reach the required dry film thickness to protect the structure from failure.
Intumiscent coatings, often referred to as intumescent paint, play a critical role in fire protection strategies across the globe. 

They offer a unique solution to protect structural elements from the devastating effects of fire. 
Intumiscent coatings can be part of a comprehensive passive fire protection system for buildings, which can, in turn, save lives. 
This article aims to provide a comprehensive understanding of intumescent paint, its working principle, its different types, and its role in a wider passive fire protection system.

Intumiscent coatings is a type of coating that reacts to heat by expanding and forming an insulating layer or carbon, also known as a char. 
This char is a poor conductor of heat, so it insulates and protects the underlying structure from the extreme heat of a fire.
Intumiscent coatings’s often used to help protect load-bearing components of a building against fire damage and can also slow the spread of a fire.

Intumiscent coatings produce a light char which is a poor conductor of heat, thus retarding heat transfer. 
Typically the light char consists of microporous carbonaceous foam formed by a chemical reaction of three main components: ammonium polyphosphate, pentaerythritol, and melamine.
The reaction takes place in a matrix formed by the molten binder which is typically based on vinyl acetate copolymers or styrene acrylates.

Intumiscent coatings contain a significant amount of hydrates. 
When the hydrates are heated, they decompose, and water vapour is released, which has a cooling effect. 
Once the water is spent, the insulation characteristics of the char that remains can retard heat transfer through the fire stop assembly.

Soft char Intumiscent coatings are typically used in thin film intumescent materials for fireproofing protection of structural steel as well as in firestop pillows.
Intumiscent coatings is one of the country's leading intumescent coating suppliers for many industries, including aerospace. 
When exposed to fire or high temperatures, typically above 200°C (392°F), the intumescent coating reacts chemically and begins to swell.

As the coating swells, it forms a thick, foamy layer of carbonaceous char. 
This layer is non-combustible and acts as an insulator, reducing the heat transfer to the substrate.
The char layer effectively protects the substrate material (such as steel beams or wooden surfaces) from the direct heat of the fire, delaying its heating and potential structural failure.

Intumiscent coatings are designed to meet specific fire resistance ratings and standards. 
They are applied in layers of varying thicknesses, depending on the required level of fire protection and the type of substrate.
Intumiscent coatings is used on structural steel members, columns, beams, and ceilings to enhance fire safety in commercial and residential buildings.

Applied in vehicles, ships, and airplanes to protect structural components and materials from fire hazards.
Intumiscent coatings is used in warehouses, manufacturing plants, and facilities housing flammable materials to mitigate fire risks and ensure workplace safety.
Applied in offshore platforms, refineries, and petrochemical plants to protect against fire hazards and maintain operational safety.

Provides effective passive fire protection by delaying the spread of fire and maintaining structural integrity.
Long-lasting and resistant to weathering, making them suitable for both indoor and outdoor applications.

Can be formulated to provide aesthetic finishes while offering fire protection, enhancing architectural design.
Helps buildings and structures comply with fire safety regulations and building codes.

Uses Of Intumiscent coatings:
Intumiscent coatings, or MIT as it is sometimes known, is a preservative used in cosmetics and beauty products. 
Intumiscent coatings is a powerful biocide, or &ldquo; chemical substance capable of killing living organisms, usually in a selective way &duo;Biocides are a general term that includes antimicrobial, germicide, antibiotic, and antifungal. 

Intumiscent coatings is used to prevent a wide variety of bacteria and fungi from growing in cosmetics and beauty products, most often in shampoo. 
Intumiscent coatings is only approved for use in rinse-off formulas and at low concentrations.
Intumiscent coatings is a preservative compound widely used in cosmetics. 

Intumiscent coatings is a contact allergen and sensitiser. 
Intumiscent coatings has recently been identified as a neurotoxin that can damage nerve endings with repeated exposure.
Applied to structural steel beams, columns, and connections in high-rise buildings, commercial complexes, and industrial facilities to prevent structural collapse and maintain integrity during a fire.

Intumiscent coatings is used on wooden doors, partitions, and ceilings in buildings to delay ignition and reduce fire spread.
Applied in refineries, petrochemical plants, and offshore platforms to protect steel structures and equipment from fire hazards, ensuring operational safety and compliance with regulatory standards.
Intumiscent coatings is used in factories, warehouses, and processing plants where flammable materials are present to minimize fire risks and protect critical infrastructure.

Applied in trains, buses, airplanes, and ships to enhance fire safety and prevent fire propagation, protecting passengers and crew members.
Intumiscent coatings is used to coat tunnel linings and structures to mitigate fire risks and ensure safe passage during emergencies.
Used in schools, hospitals, shopping malls, and other public spaces to enhance fire resistance and provide a safe environment for occupants.

Applied to pipes, ducts, and cables in buildings to maintain fire barriers and prevent fire spread through service penetrations.
Used to protect server rooms and data storage facilities from fire hazards, ensuring continuous operation and data integrity.
Applied in heritage structures and museums to preserve architectural integrity and protect valuable artifacts during fire incidents.

Delays the spread of fire and maintains structural integrity, providing crucial time for evacuation and firefighting efforts.
Helps buildings and structures meet fire safety regulations, building codes, and insurance requirements.
Can be applied to various substrates including steel, wood, concrete, and plastics, providing flexible fire protection solutions.

Offers long-term protection with minimal maintenance requirements, contributing to cost-effectiveness over the building's lifespan.
Applied to fire doors and partitions to enhance their fire resistance capabilities, creating fire compartments within buildings and delaying fire spread between different areas.
Intumiscent coatings is used in industrial and commercial buildings to protect exposed structural steel members, such as beams, columns, and trusses, from heat and fire damage.

Applied in facilities housing critical infrastructure components, such as power plants, telecommunications hubs, and water treatment facilities, to ensure continuous operation and safety in the event of a fire.
Intumiscent coatings is used in environments where there is a high risk of fire, such as chemical processing plants, oil refineries, and storage facilities handling flammable materials.

Intumescent coatings can also be used for architectural purposes, providing aesthetically pleasing finishes while offering fire protection. 
They can be applied to exposed steel beams or columns in modern building designs to maintain an industrial or minimalist aesthetic.
Intumescent coatings are typically applied as paint or spray coatings. 

The application method and thickness are critical factors in achieving the desired fire resistance rating.
Intumescent coatings must undergo rigorous testing and certification to ensure they meet specific fire resistance standards and regulatory requirements. 
This includes tests for fire endurance, adhesion, and impact resistance.

Manufacturers are increasingly focusing on developing low-VOC (Volatile Organic Compound) formulations and environmentally friendly options to minimize emissions and health risks during application and in service.
While intumescent coatings provide long-term fire protection, periodic inspections and maintenance are recommended to ensure the integrity of the coating over time. 
This may include checking for damage, recoating as needed, and verifying compliance with fire safety standards.

Side effects Of Intumiscent coatings:
Early on, dermatitis may occur only on part of the exposed skin. 
Common patterns include: hand dermatitis，perianal dermatitis, perivulval dermatitis, napkin dermatitis, facial dermatitis, eyelid swelling, and scalp dermatitis. 
Later, more extensive and severe whole-body contact dermatitis may occur in very sensitive people.

Safety Profile Of Intumiscent coatings:
Intumiscent coatings is a heterocyclic organic compound used as a preservative in cosmetics and personal care products in concentrations up to 0.01%. 
Intumiscent coatings is a colorless, clear liquid with a mild odor that is completely soluble in water; mostly soluble in acetonitrile, methanol, and hexane; and slightly soluble in xylene. 
Consistent with its solubility, dermal penetration is low. 

The Cosmetic Ingredient Review Expert Panel noted the in vitro evidence of neurotoxicity but concluded that the absence of any neurotoxicity findings in the many in vivo studies, including subchronic, chronic, and reproductive and developmental animal studies, suggests that MIT would not be neurotoxic as used in cosmetics. 
Although recognizing that Intumiscent coatings was a sensitizer in both animal and human studies, the panel concluded that there is a threshold dose response and that cosmetic products formulated to contain concentrations of Intumiscent coatings at 100 ppm (0.0 1%) or less would not be expected to pose a sensitization risk. 

Accordingly, Intumiscent coatings may be safely used as a preservative in cosmetics up to that concentration.
Intumiscent coatings of aerosolized particles during application or sanding can irritate the respiratory system and cause respiratory distress, especially in individuals with pre-existing conditions like asthma or allergies.
Direct contact with wet or uncured coatings may cause skin irritation or dermatitis, particularly for individuals with sensitive skin or prolonged exposure.

Contact with the eyes can cause irritation, redness, and potential damage to the eyes. 
Protective eyewear is recommended during application and handling.
Some intumescent coatings may contain VOCs, which can contribute to indoor air pollution and have adverse health effects, including headaches, nausea, and respiratory issues.

Depending on the formulation, intumescent coatings may contain hazardous chemicals such as solvents, resins, and flame retardants. 
These chemicals can pose health risks if not handled properly or if exposure levels exceed recommended limits.

Hazard Profile Of Intumiscent coatings:
Intumiscent coatings is allergenic and cytotoxic, and this has led to some concern over its use.
A report released by the European Scientific Committee on Cosmetic Products and Non-food Products Intended for Consumers (SCCNFP) in 2003 also concluded that insufficient information was available to allow for an adequate risk assessment analysis of MIT.