New PE plastomers excel in compounding roles.An unusual combination of high flow and low crystallinity characterize a new line of specialty polyolefins for polymer modification and masterbatch carriers. Affinity GA polyolefin plastomers (POPs) from Dow Polyolefins & Elastomers in Housten are based on the company's Insite metallocene catalyst Metallocene catalyst A transition-metal atom sandwiched between ring structures having a well-defined single catalytic site and well-understood molecular structure used to produce uniform polyolefins with unique structures and physical properties. . They have very low density and low molecular weight. Affinity GA 1950 has 0.874 g/cc density and an approximate MI of 500. GA 1900 has a density of 0.870 and approximate MI of 1000. They have 15% crystallinity, vs. 50% to 80% for typical Ziegler-Natta PEs. The new POPs can be compounded or blended with SEBS, TPO (Twisted Pair Only) Refers to the use of twisted pair wire when other options are available. For example, a TPO suffix at the end of 3com Ethernet adapter model numbers indicates the card has only an RJ45 connector. , TPV TPV Temporary Protection Visa (Australia) TPV Terminal Punto Venta TPV Third-Party Verification TPV Thermophotovoltaic TPV Thermoplastic Vulcanizate (thermoplastic elastomer) TPV Total Payment Volume , PE, and PP to improve flow, flexibility, adhesion, and mechanical properties. They also have potential for use in nylon and PET. When added at 15% to a Kraton G SEBS, GA 1950 increases tensile strength tensile strength Ratio of the maximum load a material can support without fracture when being stretched to the original area of a cross section of the material. When stresses less than the tensile strength are removed, a material completely or partially returns to its four-fold and elongation five-fold. Because of excellent compatibility with SEBS and TPVs, these POPs are said to deliver the lubricity lu·bric·i·ty n. The quality or condition of being lubricious. [Late Latin l  bricit of wax or oil modifiers without drawbacks of brittleness or migration. Added at low levels of 5% to 7% to TPOs, they increase flow by 25% without sacrificing impact properties. Masterbatch carriers are another target for the new POPs, which can accept higher filler loadings--i.e., 60% to 85% vs. 20% to 40% for traditional carriers. GA 1900 and GA 1950 have low melting points of 154 to 158 F, making them well suited to use with-sensitive additives like flame retardants, blowing agents, peroxides, certain antioxidants Antioxidants Substances that reduce the damage of the highly reactive free radicals that are the byproducts of the cells. Mentioned in: Aging, Nutritional Supplements antioxidants, n. , and organic pigments. Tel: (800) 441-4369 * PT Direct: 112WD [ILLUSTRATION OMITTED] |
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