Detail of "78-90-0"

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Synthesis, characterization and properties of 2-(perfluorooctyl)ethyl acrylate grafted segmented polyurethaneureas

Synthesis, characterization and properties of 2-(perfluorooctyl)ethyl acrylate grafted segmented polyurethaneureas. Tomita, Takehiro; Li, Yu-jun; Nakaya, Tadao (Department of Bioapplied Chemistry, Faculty of Engineering, Osaka City University, Osaka 558-8585, Japan). Macromolecular Chemistry and Physics, 204(17), 2113-2122 (English) 2003 Wiley-VCH Verlag GmbH & Co. KGaA. CODEN: MCHPES. ISSN: 1022-1352. DOCUMENT TYPE: Journal CA Section: 63 (Pharmaceuticals) Section cross-reference(s): 35, 36, 39 We report herein that 2-(perfluorooctyl)ethylacrylate (PFEA) was successfully grafted onto a segmented polyurethaneurea (SPUU). We found that certain PFEA oriented onto the grafted SPUU film surface could significantly improve hemocompatibility. 1,2-Propanediamine (PD) as a chain extender was used to synthesize the SPUU, which was based on diphenylmethane diisocyanate (MDI), vinyl group-contg. poly(butadiene) diol (PBD), and hydrogenated poly(isoprene) diol (HPIP). PFEA was copolymd. with the SPUU using a,a'-azobis(isobutyronitrile) (AIBN) as a radical initiator. Various feed ratios of PFEA grafted polymers were synthesized (SPUU-F-0.5, SPUU-F-0.75, and SPUU-F-1.0) while non-grafted SPUU was abbreviated as NG-SPUU. The bulk characteristics of the resulting polymers were investigated by IR spectroscopy (IR) measurement. Mech.Several reagents with their cas registry numbers 9003-31-0 and 9003-17-2 are used here. properties of the typical PFEA grafted SPUU were measured by dynamic viscoelasticity and tensile measurements. We found that PFEA oriented on the surface, as revealed by attenuated total reflectance-Fourier transform IR spectroscopy (ATR-FTIR), electron spectroscopy for chem. anal. (ESCA), and water contact angle measurements. The hemocompatibility in vitro was evaluated with rabbit platelet-rich plasma (PRP) contact tests and viewed by electron probe microanalyzer (EPM) using NG-SPUU as a ref. We found that fewer platelets adhered to the PFEA grafted surfaces. New polymer SPUU-F-0.5 showed the best hemocompatibility in the tested samples. Platelet adhesion to PFEA grafted polymers SPUU-F-0.5, SPUU-F-0.75, and SPUU-F-1.0 was inhibited 91%, 58%, and 50% compared with NG-SPUU. The relative clotting time of the cast films in contact with cow platelet-poor plasma (PPP) was 3.26, 2.94, 1.95, 2.39 and 1.00 for SPUU-F-0.5, SPUU-F-0.75, SPUU-F-1.0, NG-SPUU, and glass, resp. The new polymers also showed the common characters of fluorinated polymers as revealed by water vapor transmission, dielec. const., and index of refraction measurements. .

Upgrading hydrocarbon streams comprising conjugated diolefins

Upgrading hydrocarbon streams comprising conjugated diolefins. Broekhuis, Antonius Augustinus (Shell Internationale Research Maatschappij B. V., Neth.). Eur. Pat. Appl. EP 94699 A1 23 Nov 1983, 22 pp. DESIGNATED STATES: R: BE, DE, FR, GB, IT, NL. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C07C007-148; C07C005-22; C08F136-04. APPLICATION: EP 83-200539 15 Apr 1983. PRIORITY: GB 82-14486 18 May 1982. DOCUMENT TYPE: Patent CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) RCYCH (R = Et [107-00-6], Pr [689-97-4], or CH:CH2 [627-19-0]), CR:C:CHR1 (R = H, R1 = Me [590-19-2]; R = Me, R1 = H [598-25-4]), and cyclopentadiene [542-92-7] are removed from petroleum refinery streams contg. butadiene [106-99-0] and piperylene (I) [1574-41-0] by treatment at room temp. in Na-lubricating oil dispersions contg. 109-76-2 and 107-15-3 which are cas registry numbers of substances are two of reagents here. primary amines. Suitable amines include hexylamine [111-26-2], butylamine [109-73-9], H2N(CH2)nNH2 (n = 2 [107-15-3], 3 [109-76-2], and 6 [124-09-4]), 1,2-diaminopropane [78-90-0], and diethylenetriamine [111-40-0]. The process results in partial isomerization of I (including formation of up to 9.4% cyclopentene [142-29-0]). .