The Polyurethanes division of Huntsman Corporation announced the introduction of two new grades of patented, unplasticized, soft thermoplastic polyurethanes (TPUs). IROGRAN® A60E4902 is a Shore 55A polyester, and IROGRAN® A65P4910 is a Shore 65A polyether. The exemplary feature of these grades is that they achieve a very soft Shore hardness through the basic chemistry of the TPU formulations, without the use of plasticizers or other modifiers, making them ideal for PVC replacement where the presence of phthalates or other plasticizers may be an issue.
Due to their unplasticized formulations, the materials are not tacky, do not exude a surface film, and maintain these characteristics and properties without the prospect of migration. They also have excellent drape and hand with a very supple feel. Other key properties and characteristics of the TPUs are:
" Exceptional resiliency, with high elastic recovery
" Low extractables
" High clarity, low yellowness index
" Good abrasion, tear, and elongation
" Excellent processing with fast cycling
" IROGRAN® A60E4902 is USP Class VI compliant
Both IROGRAN® A60E4902 and A65P4910 grades are formulated for technical extrusion, injection molding, and film processing. They can also be solvated for cast film and dip molding. With exceptional softness and outstanding resiliency, these resins are ideal in a variety of applications, including: overmolding, toys, tubing, PVC & silicone replacement, gaskets, and compounding, to name just a few.