Lupranate® M20S
Polymethylene Polyphenylpolyisocyanate
Technical Bulletin
August 2001
Lupranate® M20S is a polymeric MDI with a functionality of approximately 2.7. Lupranate M20S is suitable for the
production of rigid insulation foams by molding, spraying, and frothing. It is also used for rigid and semi-flexible
integral skin foams, adhesives, sealants, elastomers, and high-resiliency flexible foams. In low catalyzed rigid
urethane formulations, the foam rise time can be lengthened by 20-30%. The slower reactivity can be advanta-
geous in applications such as large rigid foam panels or molded flexible foams.
Typical Properties
Appearance ............................................................. dark brown liquid
NCO content, wt. % ..................................................................... 31.5
Viscosity @ 25°C, cps ................................................................. 200
Hydrolyzable chlorine, wt. % ....................................................... 0.035
Flash point, °C (COC) .................................................................. 200
Density @ 25°C, g/cm3 ............................................................... 1.23
Initial boiling point, 5 mm Hg, °C ................................................... 190
Vapor pressure @ 25 °C, mm Hg .............................................. 0.0002
Storage: Lupranate M20S is supplied in tank cars, Important: While the descriptions, designs, data and
tank trucks, and drums. Once a container has been information contained herein are presented in good
opened, care should be taken to exclude moisture. The faith and believed to be accurate, it is provided for
most favorable temperature for storage is 15-35°C. If your guidance only. Because many factors may
stored at higher temperatures, or if moisture is not affect processing or application/use, we recommend
excluded, an undesirable increase in viscosity will that you make tests to determine the suitability of a
occur. Below 15°C, the product becomes difficult to product for your particular purpose prior to use. NO
pump and pour. Below 0°C, crystallization may occur. WARRANTIES OF ANY KIND, EITHER EXPRESS
The shelf life of Lupranate M20S is six months if the OR IMPLIED, INCLUDING WARRANTIES OF
temperature is maintained at 15-35°C and moisture is MERCHANTABILITY OR FITNESS FOR A PARTICU-
excluded. LAR PURPOSE, ARE MADE REGARDING PROD-
Warning: These products can be used to prepare a UCTS DESCRIBED OR DESIGNS, DATA OR INFOR-
variety of polyurethane products. Polyurethanes are MATION SET FORTH, OR THAT THE PRODUCTS,
organic materials and must be considered combustible. DESIGNS, DATA OR INFORMATION MAY BE USED
WITHOUT INFRINGING THE INTELLECTUAL PROP-
In case of chemical emergency: Call CHEMTREC ERTY RIGHTS OF OTHERS. IN NO CASE SHALL
800-424-9300 or BASF (800-832-HELP) day or night for THE DESCRIPTIONS, INFORMATION, DATA OR
assistance and information concerning spilled material, DESIGNS PROVIDED BE CONSIDERED A PART
fire, exposure and other chemical accidents. Outside the OF OUR TERMS AND CONDITIONS OF SALE.
U.S., call (703) 527-3887. Further, you expressly understand and agree that the
descriptions, designs, data, and information furnished
by BASF hereunder are provided gratis and BASF
Attention: This product is sold solely for use by assumes no obligation or liability for the description,
industrial institutions. Refer to our Material Safety Data
designs, data and information given or results
Sheet (MSDS) regarding regulatory compliance, safety,
obtained, all such being given and accepted at your
hazards, spill procedures and disposal of this product.
risk.
An MSDS as well as additional information on BASF
urethane chemicals may be obtained by telephoning
BASF Corporation, Urethane Customer Service at
(877) 297-3322 or faxing (734) 324-6866.
BASF Corporation
1609 Biddle Avenue
Wyandotte, Michigan 48192
©2000 BASF Corporation (January) (734) 324-6100
Lupranate is a registered trademark of BASF Aktiengesellschaft. http://www.basf.com/usa
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