Polybutadiene-based TPU is an industry first.A new TPU TPU - Text Processing Utility from Sartomer Co. Inc, Exton, Pa., is reportedly the first to be made from hydroxyl-terminated polybutadiene Hydroxyl-terminated polybutadiene (HTPB) is a polymer of butadiene terminated at each end with a hydroxyl functional group. It belongs to a class of polymers known as polyols. . Poly bd 2035 and three other related TPU grades have a novel multiblock structure and a polybutadiene backbone that gives greater resistance to strong acids and bases than standard TPUs. The new resins also offer barrier to oxygen and moisture plus unusual electrical properties: Volume resistivity resistivity Electrical resistance of a conductor of unit cross-sectional area and unit length. The resistivity of a conductor depends on its composition and its temperature. is [10.sup.14] ohm-cm and surface resistivity is 1.5 x [10.sup.16] ohm/sq. Uses include films, adhesives, and sealants that require resistance to aggressive media or long-term exposure to humidity humidity, moisture content of the atmosphere, a primary element of climate. Humidity measurements include absolute humidity, the mass of water vapor per unit volume of natural air; relative humidity (usually meant when the term humidity . These TPUs can also act as modifiers for polyolefins and engineering resins or as tie layers between non-polar materials such as rubber and polar substrates such as PUR. Grades for injection and extrusion have hardnesses from 70 to 90 Shore A. Tel: (610) 363-4100 * PT Direct: 561VV [ILLUSTRATION OMITTED] |
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