Olefinic elastomers

Swogger, K.W., Carnahan, E.M., Hoenig, W.D., and Frencham, A.R., The Development of a New Generation of Novel High Performance Olefin Elastomers Erom Molecular Design to Market Development, SPEANTEC Tech. Papers, 52, 1008 (2006)... 

Hiltner, A., Wang, H., Khariwala, D., Cheung, W., Chum, S., and Baer, E., Solid State Structure and Properties of Novel High Performance Olefin Elastomers, SPE ANTEC Tech. Papers, 52, 1000 (2006)... 

Patent Number EP 997493 A1 20000503 CROSSLINKED OLEFIN ELASTOMER FOAM AND ELASTOMER COMPOSITION THEREFOR... 

Anionic Thermoplastic olefin elastomers (copolymers of butadiene, isoprene, and styrene)... 

Lee, D.C., Laakso, R., Gross, L., Muskopf, J., Olefinic elastomers for wire and cable applications, in Proceedings of the 55th IWCS/Focus International Wire Cable Symposium, Providence, RI, 2006, pp. 158-163. 

Kohara S et al. (1999) Thermoplastic olefin elastomer compositions with low compression set, no oil bleeding, and good weather resistance. JP Patent 11181172... 

Applications of ethylene-propylene copolymers and terpolymers include automotive (the major use area), thermoplastic olefin elastomers, single-ply roofing, viscosity index improvers for lube oils, wire and cable insulation, hose, appliance parts, and polymer modification. 

The relative insensitivity of this class of Ni catalysts to polar functional groups, and especially their low oxophilicity, is another important characteristic. This property has been exploited for the development of novel polymeric materials that might find new applications. For example, 1-hexene has been copolymerized with 6-(2-ureido-4-[lH]-pyrimidinone)hex-l-ene (30) to generate a new poly(olefin) elastomer (equation 7). The dimerization (through H-bonding) of the pyrimidinone moieties forms noncovalent crosslinks that bestow unique properties to the otherwise amorphous poly(l-hexene) matrix. 

Determination of Properties. For all determinations, the PVC and the PS had molecular weights comparable to that of the homopolymer present in the crude reaction products. PVC was characterized under conditions described previously (15, 23). With PS, beads of product mixed with a specific antioxidant of the olefin elastomer (0.05%) and with a stearic acid derivative as lubricant (0.2%) were homogenized by extrusion in a double-screw extruder thus the material was obtained as granules. The test specimens were machined to proper size and shape from compression-molded sheets (190°C, 40 kg/cm2). 

PPE-MA with bis-2-hydroxy ethyl fumaramide, PA, and functionalized ethylene-a-olefin elastomer Dimension commercial blends with high elongation, impact strength, HDT, and dimensional stability Akkapeddi etal., 1988, 1992... 

Polypropylene Blends The majority of papers related to the crystallization of isotactic polypropylene, PP, based blends concern those where the PP matrix crystallizes in the presence of a molten dispersed phase of polyethylenes and olefinic elastomers. As a result, crystallization of a PP matrix in the presence of a solidified dispersed polymer has seldom been reported [Nadkarni and Jog, 1991]. 

Rovel (Uniroyal, USA) SAN copolymer/saturated olefinic elastomer, SAN/EPR Resistant to acid, alkah, alcohol and oil poor resistance in gasohne... 

S. B. Brown, C.-F. R. Hwang, H. Ishida, J. J. Scobbo, Jr., and J. B. Yates, III. Functional poly(phenylene ether)/poly(arylene sulfide)/epoxy function alpha olefin elastomer/elastomeric block copolymer/metal salt compositions and process for making thereof. US Patent 6303708, assigned to General Electric Company (Pittsfield, MA), October 16, 2001. 

TPE-0 Thermoplastic olefin elastomer, uncross-Iinked Blend... 

Thompson, M. R. and Yeung, K. K. 2006. Recyclability of a layered silicate-thermoplastic olefin elastomer nanocomposite. Polymer Degradation and Stability 91 2396-2407. 

As a consequence, before 1953, the only possible blends were those of LDPE with other polymers than PO or with elastomers (e.g., chlorosulfonated polyethylene rubber, CSR chlorinated butyl mbber, CBR ethylene/propylene/diene copolymers, EPR, EPDM thermoplastic olefinic elastomer TPE, TPO). However, in addition to the original autoclave polymerization, already in 1938, a tubular reactor was introduced and its product had different properties than that from the autoclave. Also varying the reaction condition affected the degree of short- and long-chain branching in LDPE thus, blending different LDPEs offered a way for optimizing the resin to specific applications. 

TOE Catalyst turnover frequency TPE Thermoplastic elastomer TPO Thermoplastic olefinic elastomer TPU Thermoplastic urethanes TPV Thermoplastic vulcanizate TR Tubular reactor... 

A patent on reactor-blended thermoplastic olefinic elastomer, R-TPO, was disclosed. Thus, PE was polymerized in the presence of an active catalyst and an already polymerized olefinic copolymer (e.g., ethylene-co-1-butene) or the sequence was reversed. The blend had superior resistance to environment stress cracking, and the blown film showed few fish eyes... 

In 1979 UNIPOL process for gas-phase production of LLDPE was introduced by the UCC. Since the new resins were difficult to process on the LDPE processing lines, several patents were issued for LLDPE blends with, e.g., LDPE or PP, which had better processability In 1982 a number of patent applications for blends of LLDPE, with other polyolefins, co-polyolefins, and olefinic elastomers, for example, ethylene copolymers and thermoplastic elastomers (e.g., TPO, EPDM, EPR, EVAc, PP-MA,), have been filed... 

The first patent on reactor-blended thermoplastic olefinic elastomer, R-TPO, was disclosed. 

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