Maastricht, Netherlands — New developments in flame retardants, anti-hydrolysis additives, and prepolymers for elastomers, coatings, adhesives and sealants will be some of the highlights of Lanxess’ stand at UTECH this year.
Information about low free isocyanate content prepolymers; alternatives to MbOCA-cured elastomers and new blocked cast elastomer systems for very large parts will also feature.
Its display will be rounded out with a wide range of materials from Lanxess’ Additives business unit.
‘We want to use this major event in the global polyurethane industry to strengthen our position as a customer-focused urethane systems provider. The focus is on our broad range of prepolymers with very low free isocyanate content. This technology opens up new opportunities for our customers, especially in terms of performance and safety,’ said Markus Eckert, head of urethane systems. Other key topics include material alternatives to MbOCA-cured cast systems and blocked systems for a range of cast and coating applications.
The company said it has one of the broadest portfolios of prepolymers with low free isocyanate content for cast elastomers. Adiprene LF prepolymers are based on TDI, MDI, HDI, IPDI, and pPDI diisocyanates, with free monomer content usually below 0.1 percent.’
‘Our low free prepolymers meet the latest regulatory standards with regard to health, safety and environmental protection, so that the processor can minimise required protective measures. At the same time, they help our customers to improve the mechanical performance of elastomer components and to produce them economically,’ said Eckert.
The company has a number of other products which are alternatives to MbOCA formulations.
Lanxess said that its Adiprene LF MDI prepolymers, and aromatic diol curing agent Vibracure 2101, are an alternative to TDI and LF TDI prepolymers cured with MbOCA (4.4′-Methylene-bis(2-chloroaniline)).
The use of MbOCA within EEA countries has recently been severely restricted and regulated by the European chemicals regulation REACH.
‘Our urethane systems meet all REACH requirements, and produce elastomers with high elasticity and improved resistance to abrasion, impact, and hydrolysis, while using the same processing equipment. In addition, they are easier to process because of their lower viscosity,’ said Eckert. The products can have a long pot life for large parts, and can be catalysed for higher productivity.
The company will also be talking about its range of Adiprene K blocked prepolymers.
These are available with curing agents to make customer-specific, fully-formulated reactive systems. These prepolymers start curing at a precisely defined temperature. This gives great control over curing, the firm added.
The systems are aimed at large, complex parts or parts made manually said Eckert. Global urethane systems provider
Urethane Systems was formed following Lanxess’ acquisition of Chemtura. 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 supplies conventional and low free prepolymers and special aqueous polyurethane dispersions (PUDs). ‘We have developed a new low free MDI prepolymer specifically for adhesives and sealants with isocyanate content of less than 0.1%,’ Eckert said.
Urethane Systems shares the stand at UTECH Europe with the Lanxess Additives business unit.
This will show off halogen-free flame retardants based on a newly developed phosphorus chemistry. Thesae are phosphate esters sold in the Disflamoll and Reofos series. They are useful in in rigid and flexible polyurethane foam applications.
The Additives business unit will also introduce Stabaxol L, the first product in a new range of low-emission hydrolysis stabilisers. 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. Lanxess said this makes it easy to dose and process without heating.
UTECH Europe 2018 is being held at Maastricht, the Netherlands 29-31 May 2018.