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Urethane Technologies Product Information


Why Urethanes?


Polyurethanes are an extremely versatile family of materials which are utilized in multiple applications worldwide. The range includes thermoset polyurethane elastomers, coatings and dispersions, thermoplastics urethane elastomers and polyurethane foams. Chemtura has the in-house technical ability to develop, manufacture and support all of these chemistries.

Our intellectual knowledge is ‘molecule building’ – we build molecules. We chemically build prepolymers, we block isocyanates, we formulate systems and we match them with the best performing curatives, crosslinkers and polyols.

The term ‘prepolymer’ refers to a monomer or system of monomers that have been reacted to an intermediate molecular weight state. This material is capable of further polymerization by reactive groups to a fully cured, high molecular weight state.
Urethanes

ADIPRENE® or VIBRATHANE® prepolymers reacted with the corresponding VIBRACURE® curative yield polyurethane elastomers. Polyurethanes elastomers are particularly known for their:

• Abrasion and Tear resistance
• Chemical Resistance
• Resistance to Compression Set
• Wide range of Stable Harnesses from Shore A to Shore D scale

TRIXENE® blocked polyisocyanates, TRIXENE® and QUASILAN® prepolymers, and WITCOBOND® aqueous polyurethanes (PUDs) are formulated downstream to create polyurethane coatings or textile binders to protect, waterproof and weatherproof substrates and surfaces.

ISOFOAM® and FLEXOCEL® two-component systems are developed to produce urethane foams varying from flexible, semi-flexible to rigid. The isocyanate component is usually MDI-based and the polyol component is fully formulated containing polyols, blowing agents, catalyst and additives.

Adhesives and Sealants

Chemtura is global supplier of polyurethane raw materials for Coatings, Adhesives, Sealants and Elastomer (CASE) applications. Our wide range of products includes urethane prepolymers, hydrophilic polyurethanes, urethane intermediates, blocked isocyanates, crosslinking agents and associated materials for many applications such as binders, 1K- and 2K-PUR adhesives and hot melts.

Specifically for adhesives and sealants, Chemtura offers products:

• Solvented and Non-Solvented
• Field- and Factory-applied
• Ambient and Heat Cured

Field Applied – Ambient Cured

TRIXENE® SC and QUASILAN® prepolymers, additives and polyols are designed for field-applied, ambient curing sealants and binders.

TRIXENE® SC are latent additives, mainly employed with isocyanate-tipped prepolymers in fully-formulated, 1-K and 2-K sealants. TRIXENE® SC TDI-, MDI- and aliphatic-based prepolymers can be used in various binder applications including cork, rubber crumb, foam lamination and various other flexible applications. The TDI-based range also offers prepolymers with free monomer at less than 0.1% which can be used in various sealant/ encapsulant applications including rail track embedment and gas pipe repair compounds. TRIXENE® SC MDI-based prepolymers typical properties include high tensile strength and chemical resistance to a wide range of solvents and acids. The main benefit of the aliphatic products is the inherent flexibility and light stability for clear adhesive applications.

The QUASILAN® prepolymers grade is typically moisture curing.

The QUASILAN® AD aromatic prepolymers find particular use in the fabric to foam lamination and foam to metal/ plastic fabrication markets.

QUASILAN® CT and QUASILAN® SE aromatic polyfunctional prepolymers can be used in one-component, moisture-curing priming and sealing applications.

QUASILAN® RB low viscosity specialty polyester/polyether polyols can be used with both aromatic, aliphatic isocyanates and prepolymers and are designed for two-component systems.

FOMREZ® polyester polyols reacted with diisocyanates are used as adhesives for books, metals and wood.

Factory Applied – Heat Cured

TRIXENE® BI blocked isocyanates are used as crosslinkers designed for one-component factory applied heat-activated adhesives. These products are available as both solvent-borne and water-borne and have a high degree of flexibility. The primary use of these products includes the flexibilization of epoxy systems, to give performance enhancement in such applications as industrial floor adhesives. They are generally ambient cured when mixed with an epoxy amine hardener.

WITCOFLEX® hydrophilic polyurethanes adhesives are a range of moisture-vapor permeable polyurethanes which are used to produce very soft, durable, waterproof and highly breathable laminates for sportswear, leisurewear, industrial and in some medical applications.

WITCOBOND® water-based polyurethane dispersions (PUDs) enable formulators to comply with increasingly demanding regulations on VOC (volatile organic content), effluents and other potentially harmful components.

Chemtura’s ADIPRENE® LF technology enables the industry to meet progressive regulations and labeling requirements restricting free isocyanate. They provide performance, processing and environmental, health and safety benefits. Our ADIPRENE® LF products contain free monomer levels of:

• LF TDI, LF PPDI, LF HDI below 0.1%

• LF MDI below 1% and for special requirements potentially below 0.5%

Coatings

Chemtura is global supplier of polyurethane raw materials for Coatings, Adhesives, Sealants and Elastomer (CASE) applications. Our wide range of products includes Urethane Prepolymers, Hydrophilic Polyurethanes, Urethane Intermediates, Blocked Isocyanates, Crosslinking Agents and associated materials for many applications such as surface coatings, textile and leather finishes, composites, adhesives, sealants, foams, inks and binders for many applications in a diverse range of industries.

Specifically for Coatings, Chemtura offers products:

• Solvented and Non-Solvented
• 100% solids and water-based
• Field- and Factory-applied
• Ambient and Heat Cured

TRIXENE® and QUASILAN® prepolymers, additives and polyols are designed for field-applied, ambient curing coatings.

TRIXENE® BI blocked isocyanates are used as crosslinkers designed for one-component factory applied heat-cured coatings. These products are available as both solvent-borne and water-borne.

WITCOFLEX® hydrophilic polyurethanes are a range of moisture-vapor permeable polyurethanes which are used for textile laminates and adhesives to make the fabric breathable and waterproof.

WITCOBOND® water-based polyurethane dispersions (PUDs) enable formulators to comply with increasingly demanding regulations on VOC (volatile organic content), effluents and other potentially harmful components.

FOMREZ® polyester polyols are used in coatings to protect surfaces and substrates, as a dispersion medium for pigments in paints and other high wear, long lasting applications.

Blocked Isocyanate Crosslinkers

Chemtura’s range of TRIXENE® BI blocked isocyanates are used as crosslinkers designed for one-component factory applied heat-cured coatings. These products are available as both solvent-borne and water-borne.

Through patented technology, TRIXENE® BI blocked isocyanates will unblock at temperatures as low as 80ºC (with aromatic isocyanates), providing a balance of low-temperature curing and excellent physical properties for one-component systems. In fact, Chemtura offers products with various blocking agents to meet deblocking temperature requirements from 80º to 160ºC. A major blocking agent is 3,5-dimethylpyrazole (DMP), which is capable of deblocking at temperatures around 120oC

TRIXENE® BI blocked isocyanates offer the processor and end-user significant benefits over traditional crosslinkers:

• A range of flexibility, functionality and branching
• Compatibility and stability in the presence of hydroxyl-bearing resins including polyester, polyether, acrylates as well as epoxy and phenolic resins
• Monomeric isocyanate emissions are well below safety limits during crosslinking
• Exceptional color retention and pigment tolerance
• No significant VOC increases compared with standard coatings (DMP technology)
• No significant overbake yellowing (aliphatic systems and DMP blocking)
• No interference with acid catalysts in clear coats on overcoating melamine-containing basecoats
• Solids content suitable for medium to high solids coatings
• Water dispersible and emulsified blocked isocyanates for low VOC aqueous coating formulations

Chemtura is at the forefront of blocked isocyanate technology, with products designed as solvent-borne, water-borne and 100% solids for high performance coatings formulations in a wide range of application areas including:

• Automotive OEM applications
• Cathodic or Anodic Electrodeposition
• Coil Coating
• Curtain Coating
• Electrostatic Spraying

Breathable Textile Coatings

The textile industry requires some fabrics to be waterproof and benefits from urethanes ability to modify the tactile feel of the material and to create decorative effects, such as in synthetic leather and denim. WITCOFLEX SUPERDRY® and ECODRY® coatings and films enable the textile industry to meet their requirements for fabrics that are soft, waterproof and breathable for durability and comfort of leisurewear, workwear and sportswear such as garments, tents, rucksacks, luggage, groundsheets and sleeping bags.

WITCOFLEX® hydrophilic polyurethanes are a range of moisture-vapor permeable polyurethanes available as solvent-based coating formulations that can be applied by either direct or transfer coating techniques. They can also be used to produce films which can be cast out on to a release carrier to form unsupported films and membranes. These can be further laminated to fabric(s) with water-based WITCOFLEX® adhesives.

Polyurethane Dispersions (PUDs)

Chemtura is a global supplier of polyurethane dispersions (PUDs) for the CAS (Coatings, Adhesives and Sealants) industry.

WITCOBOND® water-based polyurethane dispersions enable formulators to comply with increasingly demanding regulations on VOC (volatile organic content), effluents and other potentially harmful components. They can provide a full range of polymer properties in terms of toughness, hardness flexibility, weatherability and overall durability. They are used in industrial coatings, glass-fiber sizing (composites), leather and textile coatings and finishes and plastic coatings.

WITCOBOND® PUDs are available with solids content of 30-60% w/w and low viscosities. Anionic grades are mainly used in aqueous formulations with pH greater than 7 and can be used on their own or combined with other aqueous polymers such as acrylic dispersions and with pigments, matting agents, thickeners and other auxiliaries. They can be crosslinked with various agents to further improve chemical resistance and robustness. Dispersions with a range of solids content, adhesion levels, and physical properties provide choice for the end-user. Main applications include:

• Fiber Sizing for Composites, e.g. GRP (glass-reinforced plastic)
• Inks and Overprint Varnishes
• Leather Finishing (primers, basecoats and topcoats)
• Plastic, Paper and Rubber Coatings
• Textile Coating and Finishing
• Wood, Metal, Concrete and Masonry Coatings

They are categorized according to dispersion and coating properties: WITCOBOND® High Flexibility PUDs with physical properties – tensile strength, modulus, extensibility, hardness – that match or are compatible with those of flexible substrates.

WITCOBOND® High Hardness PUDs with toughness, impact and indentation resistance and general durability, usually combined with outstanding gloss and clarity. Typical applications include topcoats for wood, metal and concrete, ink vehicles and overprint varnishes.

WITCOBOND® High Solids PUDs are cosolvent-free polyurethane dispersions containing at least 50% and more usually 60% solids (w/w). They provide excellent filling, coverage and fast-drying properties. Main applications include glass fiber sizing, and clear and pigmented coatings for flexible substrates.

WITCOBOND® Hydrolysis Resistant PUDs have improved resistance to degradation by water immersion, washing and weathering. They are mainly based on polyether components and provide multi-purpose coatings on mainly softer substrates.

Protective Coatings

Chemtura is global supplier of polyurethane raw materials for Coatings, Adhesives, Sealants and Elastomer (CASE) applications. TRIXENE® and QUASILAN® prepolymers, additives and polyols are designed for field-applied, ambient curing coatings.

TRIXENE® Prepolymers

The TRIXENE® range for high performance one- or two-component coatings are isocyanate-terminated prepolymers are based on aromatic and aliphatic diisocyanates. The aromatic types are mainly used in combination with certain tars and pitches for 1-K or 2-K flexible roofing membranes. TDI-based low free monomer versions of below 0.1% free monomer content are also available for health and safety benefits. The aliphatic products are mainly exploited for coating applications where good light stability and/or resistance to yellowing are prime requirements.

TRIXENE® SC are latent additives, mainly employed with isocyanate-tipped prepolymers in fully-formulated, 1-K and 2-K coatings.

TRIXENE® AS and ASF are moisture scavengers used in the formulation of coatings.

QUASILAN® Moisture-Curing Prepolymers and Polyols

QUASILAN® prepolymers and polyether/polyester polyols are typically moisture curing.

The QUASILAN® range of prepolymers are moisture-curing products based on TDI and MDI prepolymers and supplied as low-viscosity, clear liquids. Their main use is in primers, binders and surface coatings for porous substrates such as stone, concrete and jointing sands. QUASILAN® CT products can be applied by brush, roller or spray equipment. When fully cured, they form continuous, flexible films that help protect against chemicals, abrasion damage and erosion defects and will improve track wear performance.

QUASILAN® branched polyols containing both ether and ester groups in the molecular backbone and supplied as clear-hazy amber liquids. Alongside the appropriate crosslinkers, QUASILAN® polyols can be formulated as 2-K systems mainly for DIY and flooring markets. The co-reactant(s) can be selected from a range of multi-functional isocyanates (e.g. crude MDI) or tipped prepolymers, all based on aromatic or aliphatic chemistry. This gives the formulator a wide range of options to achieve the best balance of high performance and cost efficiency.

FOMREZ® polyesters polyols are used in coatings to protect surfaces and substrates, in paints to help the pigments disperse and other high wear, long lasting applications.

Elastomers

Cast Prepolymers

Chemtura is global supplier of polyurethane raw materials for Coatings, Adhesives, Sealants and Elastomer (CASE) applications. Urethane Cast Elastomers are used in the most demanding and rigorous applications that require an extremely high level of performance. Urethane Elastomers are known for wear and abrasion resistance, toughness and load-bearing capability. They are highly technical in terms of formulation science and processing as there are many variables that can affect the performance of the final component.

Chemtura offers a full range of cast urethane prepolymers to meet the wide range of requirements across the many industries we serve. ADIPRENE® and VIBRATHANE® Cast Urethane Prepolymers are based on MDI, TDI, PPDI and H12MDI. We also have the broadest portfolio of Low Free (LF) isocyanate monomer products – LF TDI, LF MDI, LF PPDI and LF HDI – that provide performance, processing and environmental, health and safety benefits that conform to global regulatory requirements including European REACh for low levels of free isocyanates. We formulate these prepolymers with a variety of polyols including polyester, polyether, polycaprolactone and polycarbonate. Chemtura’s own brand FOMREZ® Polyesters Polyols can be reacted with diisocyanates for the manufacturing of prepolymers for the production of cast elastomers.

Using our decades of technical expertise, we work closely with our customers to develop valuable solutions to meet their needs. Our focus on innovation keeps us at the forefront of cast elastomer technology and results in specialized products including blocked systems, low and high durometer elastomers, products that demand high dynamic performance, wide temperature properties retention, excellent abrasion and chemical resistance converted via a wide variety of processes.

ADIPRENE® and VIBRATHANE® Prepolymers
ADIPRENE® and VIBRATHANE® TDI- based and VIBRATHANE® MDI-based Prepolymers for general use in cast urethanes.
ADIPRENE® PP, PPDI-based Prepolymers for applications requiring high heat resistance and excellent dynamic properties.
VIBRATHANE® MDI-based Quasi systems for a range of hardnesses with the same raw material inventory.
Low Free (LF) monomer ADIPRENE® prepolymers
ADIPRENE® LF TDI-based Prepolymers with extremely low free monomer content to meet health and safety requirements.
ADIPRENE® LFM, LF MDI-based Prepolymers for superior processing and dynamic performance in high-end components.
ADIPRENE® LFH, LF HDI-based Prepolymers for outdoor use and weatherability.
ADIPRENE® LFP, LF PPDI-based Prepolymers for superior dynamics, heat and chemical resistance.

Application specific prepolymers
ADIPRENE® BL and ADIPRENE® BLM, TDI-, MDI and LF MDI-based blocked systems for controlled curing in applications such as abrasive pads and fabric belts.
ADIPRENE® EXTREME TDI-, MDI- and LF MDI-based Prepolymers with superior abrasion resistance for applications such as snow plough blades, scraper blades and agriculture belts.
ADIPRENE® LW, H12MDI-based aliphatic Prepolymers for transparent outdoor and weatherable applications such as military, doming, bullet proof glass and exterior construction.
ADIPRENE® RIBBON FLOW® MDI and LF MDI-based systems for single- and multi-pass rotational casting of rollers for paper making, steel formation, glass transport and printing.
ROYALCAST® TDI- and MDI-based Prepolymers for applications that require higher hardness to 85D including sub-sea pipe protection, cable protection and bowling balls.
SOLITHANE® MDI- based Prepolymers for electrical encapsulation in demanding aerospace and military applications.

Catalysts

Chemtura is global supplier of polyurethane raw materials for Coatings, Adhesives, Sealants and Elastomer (CASE) applications. Urethane cast elastomers are used in the most demanding and rigorous applications that require an extremely high level of performance. They are highly technical in terms of formulation science and processing as there are many variables that can affect the performance of the final component.

Critical in today’s manufacturing environment are high levels of efficiency and productivity. To achieve both of these objectives the PU system must offer a balance of good flow characteristics into the mold, good green strength build-up and rapid de-molding time. A significant factor in achieving this balance is catalyst selection. Chemtura offers a wide VIBRACAT® catalyst range which are chosen to work effectively with ADIPRENE® and VIBRATHANE® systems.

Curatives

Chemtura is global supplier of polyurethane raw materials for Coatings, Adhesives, Sealants and Elastomer (CASE) applications. Urethane cast elastomers are used in the most demanding and rigorous applications that require an extremely high level of performance. They are highly technical in terms of formulation science and processing as there are many variables that can affect the performance of the final component.

Chemtura offers a wide range of curatives perfectly matched to all types of prepolymer chemistries utilized in cast elastomer manufacturing. These curatives can be categorized as follows:

VIBRACURE® non-blocked curatives
• Aromatic Diamine Curatives
• Diol Curatives
• Triol Curatives
• Polyol Curatives

DURACURE® blocked curatives
• DURACURE® C3LF*
• DURACURE® C7* * Not available in EU REACH applicable countries or Switzerland

Within these curative families Chemtura offers a full range of MbOCA-free curatives.

Spray-Applied Elastomers

HARDCOTE Elastomer Systems are fully formulated polyurethane elastomer systems for the production of sprayed, poured or rotary-cast parts. The two component HARDCOTE systems can be formulated to cover a range of product groups in the glass-reinforced plastic (GRP) replacement market, including leisure, domestic and industrial, movie sets and property.. HARDCOTE systems can be utilized on its own or in conjunction with other materials to provide a hard impact resistant finish which also has a degree of flexibility.

HARDCOTE systems are designed for fast de-molding to replace or reinforce GRP parts in markets including: water features, simulated rock and scenery, signage and advertising, automotive (industrial/agricultural), shower bases, baths, spa pools, doors and hot water heating.

Changes to both processing and formulation create a range of low cost, high production output parts that can be manufactured for a short return nominal capital investment. Simple low cost tooling is sufficient to produce high quality parts, which are in-mold or post painted to the required color and resistant to UV light degradation.

TRIXENE® 5060 is a two-component system that is processed at 75-80oC and applied to a wide range of substrates using conventional meter/mix/spray equipment. The rapid gel time allows relatively thick , flexible coatings to be built up seamlessly on vertical and horizontal surfaces. Fully cured coatings possess an excellent balance of durability, chemical resistance and weatherability.

Thermoplastic polyurethanes (TPU)

Chemtura is global supplier of polyurethane raw materials for Coatings, Adhesives, Sealants and Elastomer (CASE) applications. ULTRALAST® high performance Thermoplastic Polyurethane (TPU) elastomers offers longer component life, the ability to withstand both high and low temperatures with better chemical resistance and superior dynamic properties. Processing advantages include lower required processing temperatures and improved thermal stability for reduced cycle times, easier de-molding and better aesthetics. These products can be injection molded and extruded into complex geometries.

Based on our Low Free (LF) monomer technology, we have developed a range of high performance Thermoplastic Polyurethanes that bring TPUs to new extremes. These materials combine the properties of thermoset urethanes with the high productivity that comes with thermoplastic processing and can offer substantial savings in production costs.

ULTRALAST® TPUs are ideal for applications that cannot be served by standard TPUs or are currently served by other specialty elastomers including polyether block amine elastomer (PEBA), copolyester ether (COPE), fluoroelastomers and hydrogenated nitrile butadiene rubber (HNBR).

ULTRALAST® M-series are based on LF MDI for high cut and tear strength and superior dynamic properties.

ULTRALAST® P-Series are based on LF PPDI for extreme temperature capabilities and performance in harsh environments.

FOMREZ® Polyesters Polyols are reacted with diisocyanates to produce thermoplastic polyurethane (TPU) elastomers that are used in footwear, sporting equipment, hydraulic seals, caster wheels, automotive components, belts, hoses, tubing and many other diversified applications.

Foams

Our ISOFOAM® and FLEXOCEL® Foam Systems are fully formulated systems formulated with non-flammable blowing agents which do not deplete the ozone layer. These systems produce urethane foams varying in density, hardness and surface characteristics that satisfy the broadest spectrum of flexible, semi-flexible and rigid foam applications.

Typical applications

• Automotive: RIM Parts, Acoustic and Thermal insulation and Vibration Absorbers
• Buoyancy: Lifeboats and Pleasure Boats, Mooring and Sub-Sea Oil and Gas Pipelines and Flotation
• Construction: Lightweight Composites, Structural and Decorative Moldings, Simulated Natural Wood and Stone
• Packaging and Protection: Pour-in-Place Packaging and Foam Inserts
• Thermal Insulation: Composite panels, Refrigeration, Water Heating, Pipelines and Tank Insulation

Flexible and Integral Skin Foam Systems

FLEXOCEL® Polyurethane Foam Systems are developed for the production of flexible and semi-flexible molded parts. They are all zero ozone depleting, 2-component polyether systems based on MDI. Chemtura offers fully formulated systems, water-blown or formulated with non-flammable blowing agents. These systems produce urethane foams varying in density to produce an open-celled core and with surface characteristics that satisfy the broadest spectrum of flexible and semi-flexible foam applications.

FLEXOCEL® IS integral skin systems provide unique physical characteristics of a skinned, tough surface along with a cellular foam core. This unique physical characteristics coupled with its adhesive properties enable the material to be used in conjunction with materials such as metal or wood. These systems utilize a new blowing agent technology, which enables superb flow characteristics rendering it ideal for both office furniture armrest moldings and automotive interior and exterior trim parts.

FLEXOCEL® F water blown systems deliver high resilience within automotive seating and sound insulation.

FLEXOCEL® SR water blown semi-rigid products deliver excellent energy absorption properties. Ideal for automotive trim and safety devices when employed behind PVC or ABS skins.

FLEXOCEL® MC water blown microcellular systems provide excellent flow and physical properties for their main uses as industrial workplace floor mat moldings and sports balls.

FLEXOCEL® RIM microcellular systems can offer solid materials articles (4-6mm thick) of high strength and inherent stiffness with rapid de-molding times.

Rigid Foam Systems

ISOFOAM® Rigid molded and Sprayed Foam Systems are used for producing composite panels, ranging from stone cladding and roofing panels to load bearing composites, thermal insulation, Structural SIPS building panels and lightweight composites used to simulate natural wood and stone and infrastructure stabilization solutions.

Our ISOFOAM® RM and ISOFOAM® SS Foam Systems are fully formulated liquid 2K-systems based on MDI, containing non-flammable blowing agents. All our systems are zero ozone depleting. Both PUR and PIR formulations are on the range. These systems produce urethane foams varying in density and reactivity that satisfy the broadest spectrum of rigid foam applications. They can be easily processed through injection, molding and spraying and exhibit good physical properties. A low-hydrolysable chloride variant is available for use with stainless steel materials.

Typical applications

• Insulated and Non-Insulated Composite Panel applications
• SIPS building panels and Cold Rooms
• S-RIM
• Surface and Deep Sea Buoyancy applications
• Thermal Insulation
• Water Stop for Crack Sealing of Tunnels or Mines

Polyester Polyols

Chemtura is global supplier of polyurethane raw materials for Coatings, Adhesives, Sealants and Elastomer (CASE) applications. FOMREZ® polyesters polyols are used in many diversified applications as raw materials that are combined with diisocyanates to provide a wide variety of characteristics and properties. Our products are unique because of the very little or no catalyst remaining in the product, which enables strong consistency and high reliability in processing the resulting formulations. We are technical experts in these raw materials, which are critical to the final performance of your polyurethane system and are ready to use our expertise to help you. Our high quality products are used as raw materials for Polyurethane Foam, Cast Elastomers, Adhesives, Polyurethane Dispersions (PUDs) and Coatings, Thermoplastic Polyurethanes (TPUs) and Pigments.

Typical applications

• Adhesives for Books, Metals and Wood
• Protective Coatings for Floors, Textiles, Plastics and Leather
• Flexible Foam for Seating and Cushioning, Packaging
• Anti-Static Foams
• Pigment dispersant in Paints
• Footwear
• Sporting Equipment
• Seals
• Belts, Hosing and Tubing