Controlled curing with blocked prepolymers
New Adiprene K blocked prepolymers are available with curing agents to make customer-specific, fully-formulated reactive systems. Curing of these prepolymers is triggered at a precisely defined temperature resulting is a controlled cure. “With these systems, we are targeting large and complex parts and manual processing, which is used for very low volume production,” says Eckert. These prepolymers have inherently good industrial hygiene, as there is no free isocyanate due to the blocking. Potential applications include the impregnation of fabric belts, abrasive pad binders or the coating of industrial rollers. The systems are also suitable for rotational molding and liquid injection molding.Global urethane systems provider
Urethane Systems was formed following the acquisition of Chemtura by LANXESS. Eckert: “We see ourselves as a systems provider to the global polyurethane industry. Our offering includes comprehensive systems for cast elastomers, coatings, adhesives and sealants.” The business unit is one of the world’s leading suppliers of conventional and low free prepolymers and special aqueous polyurethane dispersions (PUDs). “A particular focus is placed on solvent- and monomer-free systems. For example, we have developed a new low free MDI prepolymer specifically for adhesives and sealants with isocyanate content of less than 0.1 percent,” Eckert explains.Additives: New flame retardants and hydrolysis stabilizers
Urethane Systems shares the stand at UTECH Europe with the LANXESS Additives business unit. The innovative halogen-free flame retardants are based, among other things, on a newly developed phosphorus chemistry. One product example are the phosphate esters of the Disflamoll and Reofos series, which have proven themselves, for example, in rigid and flexible foam applications based on polyurethane as well as in coatings, adhesives and sealants. They combine plasticizing with flame retardant properties.The Additives business unit also introduces Stabaxol L, the first product in a new range of low-emission hydrolysis stabilizers. It is particularly suitable for polyester/polylactone polyols, thermoplastic polyurethanes (TPU) and other PU elastomers. The product is liquid and of low-viscosity at room temperature – therefore it is easy to dose and process without prior heating.
Source: LANXESS
