COLGNE, Germany—Lanxess A.G. has released a low monomer urethane for adhesives and sealants, and stabilizers to protect plastics against hydrolysis.
Its Adiprene LF monomer urethane range has been expanded to include grades with less than 0.1 percent free methylene diphenyl diisocyanate for adhesives and sealant applications. These new LF prepolymers offer improved industrial hygiene, excellent performance and better processing/increased productivity in cast elastomers, coatings, adhesives and sealants applications.
Lanxess said Adiprene LF prepolymers enable the formulators to streamline their manufacturing processes. With the ability to achieve lower viscosity than conventional alternatives, LF prepolymers enable formulators to minimize the use of solvents. By controlling the chemical structure, these prepolymers offer more consistent processing in terms of open time.
Also, the firms Additives business unit is expanding its product range of hydrolysis stabilizers for plastics and polyurethanes with the addition of Stabaxol L, the first product in a new line of innovative, low-emission monomeric carbodiimides.
The firm said Stabaxol L shows outstanding performance when used in the polyester/polylactone polyols, thermoplastic polyurethanes and other PU elastomers. Its use in polyurethane applications leads to an extension of the service life of the final article under moist and warm operating conditions.
The product is supplied in liquid form. It can be processed very easily as it does not have to be pre-heated in the production process, has low viscosity at room temperature and is thus easy to meter uniformly. Lanxess said typical applications include cable sheathing, shoe systems, rollers, PU hot/cold casting systems, engineering injection moldings and electronic housings.