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BASF Introduces Lupranate® 5143 Isocyanate for CASE Polyurethane Market

Published on 2005-11-08. Author : SpecialChem

WYANDOTTE, Mich.-- BASF's Polyurethanes business in North America has commercially launched Lupranate 5143 isocyanate, a carbodiimide-modified diphenylmethane diisocyanate (MDI)-based raw material. Lupranate 5143 isocyanate features improvements in low-temperature stability, clarity and shelf life compared to similar polyurethane raw materials used in coatings, adhesives, sealants, and elastomers (CASE) applications.

Pure MDI, such as monomeric 4,4-MDI, has an expected lifetime of 14 days at a storage temperature of 40-50 degrees Celsius. It has a tendency to form uretidione, commonly known as dimer, which usually signals that the shelf life has been exceeded or the material has been exposed to inappropriate temperatures during storage and handling. Dimer can alter the appearance and performance of finished products. Manufacturers commonly use carbodiimide chemistry to control the dimer formation rate and solubility level, which stabilizes the monomeric isocyanate and maintains clarity.

Manufacturing improvements have helped Lupranate 5143 isocyanate reach a lower freeze point than some traditional, carbodiimide-modified isocyanates based on 4,4-MDI. Better low temperature stability helps ease the handling concerns of field formulators.

"Lupranate 5143 complements and expands the property range of BASF's isocyanates, sharing the low temperature stability of unmodified MDI-based isocyanates with the good physical properties of 4,4-MDI-based carbodiimide-modified isocyanates," said Kevin Kilkenny, Manager of BASF's Urethane Chemicals-CASE business unit in North America. "Chemical formulators in the CASE market have long desired an isocyanate with these performance attributes."

"Our new isocyanate is formulated to produce flexible elastomers with high elongation, good impact and tensile strength, low hardness, higher heat distortion temperatures and good tear resistance. Lupranate 5143 also has a longer gel time than typical materials, which allows more formulating flexibility for systems requiring sufficient open-time," said Kilkenny.

MDI is an isocyanate chemical used as an important basic product to make polyurethanes, which are versatile plastics with a broad range of applications and properties that can be customized. MDI-based polyurethanes are used to produce CASE products, rigid foams, and flexible slab and molded forms for the automotive, building and construction, industrial, and sports and recreation markets, among others.

BASF - The Chemical Company. We don't make a lot of the products you buy. We make a lot of the products you buy better.®
BASF Corporation, headquartered in New Jersey, is the North American affiliate of BASF AG, Ludwigshafen, Germany. Rated in FORTUNE magazine as America's Most Admired Chemical Company, we employ about 10,000 people in North America and had sales of approximately $11 billion in 2004.

BASF is the world's leading chemical company: The Chemical Company. Its portfolio ranges from chemicals, plastics, performance products, agricultural products and fine chemicals to crude oil and natural gas. As a reliable partner to virtually all industries, BASF's intelligent solutions and high-value products help its customers to be more successful. BASF develops new technologies and uses them to open up additional market opportunities. It combines economic success with environmental protection and social responsibility, thus contributing to a better future. In 2004, BASF had approximately 82,000 employees and posted sales of more than $50 billion. BASF shares are traded on the stock exchanges in Frankfurt (BAS), London (BFA), New York (BF), and Zurich (AN).

Source: BASF


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