Polyurethane Basic Products
Isocyanates and polyols for versatile polymers
BASF has a globally unique portfolio of chemical intermediates for the manufacture of outstandingly versatile polyurethane (PUR) materials, including an extensive range of high-performance catalysts, polyols, additives and solvents. In addition to a high level of supplier reliability through backward integration and global PUR expertise, BTC Europe offers local presence and extensive customer services. The company also provides wide-ranging support in the development of innovative products and processes.
While rigid and semi-rigid PUR foams are used for insulation, dashboards and insulating board, flexible foam is used for upholstering car seats, furniture and mattresses. You also find PUR foam in the soles of shoes and in energy absorbing materials in the automotive industry. BASF products are appreciated in the production of thermoplastic polyurethanes (TPU) and PUR dispersions as well.
Lupranat® is including the following product families:
- Monomeric MDI
- Carbodiimide Modified MDI
- Polymeric MDI
- MDI Prepolymers and Mixtures
- TDI Toluene Diisocyanate.
- CASE and Molded Polyols: Polypropylene Glycols and Reactive Polyether Polyols
- Slabstock Polyols: Non-reactive Polyether Polyols
- Amine-based Polyether Polyols
- Polymer Polyols: Non-reactive and Reactive Polymer Polyols
- Rigid Polyether Polyols and Polyol Mixtures
- Polyester Polyols
Monomeric MDI (MMDI) refers to 4,4’- and 2,4’-isomers of methylene diphenyl diisocyanate. BTC Europe offers two standard monomeric MDI grades: pure 4,4’-MDI and a blend of 4,4’-MDI and 2,4’-MDI. Besides the standard MMDIs, various MMDI types with different stabilization and reactivity are available. Although pure 4,4’-MDI is a crystalline solid at room temperature, it is commercially available as a liquid but with a limited shelf life. Monomeric MDIs are either used as pure isocyanate, in mixtures with polymeric MDI (PMDI) or in prepolymers for flexible foams, CASE applications, shoe soles or thermoplastic polyurethanes.
Polymeric methylene diphenyl diisocyanate (PMDI) is a brown mixture of monomeric (2-ring) and polyaromatic (3-ring and higher species) methylene diphenyl diisocyanates, which is liquid at room temperature. A higher PMDI viscosity indicates a lower content of monomeric and a higher content of polyaromatic components; that is, as PMDI viscosity increases, so does isocyanate functionality. BTC Europe offers a range of PMDIs with different functionality and reactivity. PMDI is mainly used for the production of rigid foam. PMDI grades are also used as a binder in the wood-working industry. In combination with MMDI grades, polymeric MDI is also used to produce various types of flexible foam and for CASE applications.
MDI Prepolymers and Mixtures
In addition to the standard polymeric MDI (PMDI) and monomeric MDI (MMDI) grades, BTC Europe offers isocyanate prepolymers and isocyanate mixtures optimized for certain applications. Prepolymers are modified isocyanates accessible by a reaction of isocyanates or isocyanate mixtures with polyether polyols. BASF’s isocyanate mixtures and prepolymers have been designed to provide excellent processing performance combined with outstanding mechanical properties of the final product.
BASF’s Lupranat T 80 is a mixture of 80% 2,4-isomer and 20% 2,6-isomer of toluene diisocyanate (TDI). Lupranat T 80 is used for the production of slabstock and molded foam as well as for various CASE applications.
CASE and Molded Polyols
Linear polypropylene glycols (PPG) are difunctional polyols mainly used for CASE (coatings, adhesives, sealants, elastomers) applications and as for the production of binders and foams. BTC Europe offers various polypropylene glycols with molar weights rangin from 500 to 4000 g/mol. PPGs with a low molecular weight are produced by KOH catalysis. PPGs with a high molecular weight are also available as DMC catalyzed products or are solely produced by the latter technique, which lowers the content of unsaturated, monofunctional by-products to a minimum.
BASF’s non-reactive polyether polyols are suitable for the continuous production of flexible polyurethane foam by means of the slabstock process. All non-reactive polyols are triols and have a propylene oxide (PO) end-cap, creating secondary hydroxyl groups. BASF’s standard non-reactive polyether polyols Lupranol 2070, Lupranol 2074 and Lupranol 2074/2 are DMC catalyzed products with a low content of unsaturated, monofunctional by-products while Lupranol 2072 is based on KOH technology. All non-reactive polyether polyols are free of 2,6-di-tert.butyl-p-cresol (BHT). Lupranol 2074 and Lupranol 2074/2 contains an antioxidant package that is optimized with respect to scorching, Lupranol 2070, Lupranol 2072 and Lupranol 2074/2 have an antioxidant package that enables production of foams with low emissions.
BTC Europe offers a series of amine-based polyether polyols. The unique feature of this special designed polyether polyols is its autocatalytic activity. Amine-based polyols require less free catalyst while achieving the same reactivity, and thus enabling the application where low emissions or fast curing are important. While Lupranol 3402 and Lupranol 3508/1 are only based on propylene oxide (PO), creating secondary hydroxyl groups, Lupranol 1002/1 has an ethylene oxid (EO) end-cap, creating primary hydroxyl groups. All amine-based polyether polyols are free of 2.6-di-tert.butyl-p-cresol (BHT).
BTC Europe offers a series of polymer polyols (GRAFT polyols) for the production of high load bearing (HLB) and high resilience (HR) foams. All polymer polyols contain dispersed styrene/acrylonitrile (SAN) co-polymers. The dispersions are stable under standard storage conditions. All polymer polyols contain an antioxidant package that is free of 2,6-di-tert.butyl-p-cresol (BHT) and all polymer polyols have low styrene emissions. The highly filled Lupranol 4002/1 and Lupranol 4003/1 are based on KOH technology and so can be used for the production of HR and HLB foams. The products in the non-reactive polymer polyol series Lupranol 4005/1/SC are blends of Lupranol 4002/1 with Lupranol 2072 (KOH polyol) and so are compatible with standard HR polyols and can be used for high resilience (HR) or combustion-modified high resilience (CMHR) foams. Reactive polymer polyol series Lupranol 4010/1/SC are blends of Lupranol 4003/1 with Lupranol 2095 (KOH polyol), making them suitable for HR foam production.
Rigid Polyols and Polyol Mixtures
Characteristic for rigid polyols is higher functionalities at lower molecular weights. Rigid polyols have secondary hydroxyl groups only. Mixtures of Lupranol 3300 and Lupranol 3422, Lupranol 3423 or Lupranol 3424 can be used to design rigid polyol functionality and viscosity in a wide range. Rigid polyols are used in foamed and solid applications or in combination with polyols with a higher For the production of special MDI slabstock foam grades BASF designed polyol blends that are tuned to optimize the properties Rigid Polyols and Polyol Mixtures of the desired foam qualities. The portfolio includes both types of viscoelastic foam (pneumatic and chemical). All polyol blends molecular weight to increase hardness of the final product. Lupanol 3504/1 and Lupanol 3505/1 are short-chain polyols of the crosslinker type. While Lupranol 3504/1 is based on propylene oxide (PO), creating secondary hydroxyl groups. Lupranol 3505/1 is based on ethylene oxide (EO), creating primary hydroxyl groups.
BTC Europe offers a series of polyester polyols for the production of flexible foam as well as for CASE and footwear applications. For flexible foam, especially for slabstock foam, a series of polyester polyols with different properties is available. The portfolio includes a standard polyester polyol but also special grades providing reduced reactivity, optimized scorching properties or reduced emissions. For CASE and footwear applications, BTC Europe offers polyester polyols for optimized mechanical properties and hydrolysis resistance of the final product.
BTC Europe is BASF's European sales organization for small and medium-sized customers focused on specialty chemicals. Our solutions for the coatings and printing inks industries cover besides our acrylates also inorganics & intermediates as well as polar solvents and plasticisers, besides others.