Fluorosilicone copolymers

M. Doi, M.F. Refojo, Flistopathology of rabbit eyes with silicone-fluorosilicone copolymer oil as six months internal retinal tamponade, Exp. Eye Res. 61 (1995) 469-478. [Pg.444]

The latest class of silicone surfactants to be prepared are the fluorosilicone copolymers (73,74). These compounds combine disiloxane or branched trisiloxane structures modified with fiuoroalkyl radicals as the hydrophobic moiety and polyethylene oxide units as the hydrophilic group. Two copolymers containing different fiuoroalkyl groups have been reported for use in shampoo systems. The materials containing 3,3,3, trifluoropropyl units were characterized by surface tensions approximately equivalent to dimethicone fluids ( 20.1 mN/m), while polymers containing 3,3,4,4,5,5,6,6,6, nonafluorohexyl groups displayed surface tensions as low as 17.6 mN/m (75). [Pg.305]

Comparison of Reinforcing Efficiency of VDF-TFE Copolymers Relative to Silica Flour in Fluorosilicone Elastomers... [Pg.336]

Non-ionic Alkylphenol ethoxylates, long chain alkanol ethoxylates, long chain alkylamine ethoxylates, sorbitan esters and ethoxylates, castor oil ethoxylates, EO/PO copolymers, acrylic copolymers, polysiloxane-polyether copolymers, fluorosilicones... [Pg.237]

Natural Rubber and Synthetic Polyisoprene Polybutadiene and Its Copolymers Polyisobutylene and Its Copolymers Ethylene-Propylene Copolymers and Terpolymers Polychloroprene Silicone Elastomers Fluorocarbon Elastomers Fluorosilicone Elastomers Electron Beam Processing of Liquid Systems Grafting and Other Polymer Modifications... [Pg.9]

Sealants - [ELASTOMERSSYNTHETIC - POLYISOPRENE] (Vol 9) - [SEALANTS] (Vol 21) -acrylics [ACRYLICESTERPOLYMERS - SURVEY] (Voll) -barium compds in [BARIUM COMPOUNDS] (Vol 3) -based on liquid polysulfides [POLYMERS CONTAINING SULFUR - POLYSULFIDES] (Vol 19) -defoamersin [DEFOAMERS] (Vol 7) -fiom fluorosilicones [FLUORINE COMPOUNDS,ORGANIC - POLY(FLUOROSILICONES)] (Volll) -hydrocarbon resins in [HYDROCARBON RESINS] (Vol 13) -lecithin in (LECITHIN] (Vol 15) -organolithiumcmpdsinprdnof [LITHIUM AND LITHIUM COMPOUNDS] (Vol 15) -polysulfide curing [PEROXIDES AND PEROXIDE COMPOUNDS - INORGANIC PEROXIDES] (Vol 18) -propylene oxide in mfg of [PROPYLENE OXIDE] (Vol 20) -PVB m [VINYL POLYMERS - VINYL ACETAL POLYMERS] (Vol 24) -rheological measurements [RHEOLOGICAL MEASUREMENTS] (Vol 21) -from styrenic block copolymers [ELASTOMERS SYNTHETIC - THERMOPLASTIC ELASTOMERS] (Vol 9) -use of dispersants [DISPERSANTS] (Vol 8)... [Pg.874]

The original and by far the most widely available fluorosilicone since its introduction in the 1950s is polymethyltrifluoropropylsiloxane (PMTFPS), more rigorously known as poly[methyl(3,3,3-trifluoropropyl)siloxane] or poly[methyl(lH,lH, 2H,2H-trifluoropropyl)siloxane]. Unless specifically mentioned, the unfluorinated carbons are those nearest to silicon, i.e., poly(methylnon-afluorohexyl)siloxane (PMNFHS) is poly[methyl(lH,lH,2H,2H-nonafluoro-hexyl)siloxane]. Currently, only copolymers of PMTFPS and PMNFHS with poly siloxane (PDMS) are available commercially.79... [Pg.27]

The most common method of preparation of PMTFPS is through the base-catalyzed ring-opening polymerization of the corresponding cyclic trimer.61-62 Details are in Section 2.11.1. A specific cure site for peroxide curing is developed by incorporating 0.2 mol% of methylvinyl siloxane.63 Typically, fluorosilicone elastomers are copolymers of 90 mol% of trifluoropropylsiloxy and 10 mol% of dimethylsiloxy monomers, but the fluorosilicone content in commercial products ranges from 40 to 90 mol%.63... [Pg.114]

Property ECO, CO Epichlrohydrin homopolymer and copolymer Fluorosilicone EPDM Ethylene propylene CSM Chlorosulfonated polyethylene FPM Fluorocarbon elastomers... [Pg.2228]

During the last two decades, many special fluoropolymers have been developed, such as fluorosilicones fluorinated polyurethanes fluorinated thermoplastic elastomers new, second-generation polymers and copolymers based on PTEE amorphous... [Pg.1]

Fluorosilicone, dimethylsilicone homopolymers, as well as their copolymers, are negatively charged and inhibit the blood clotting reaction. There are a number of polyelectrolytes which have negative zeta potentials and are antithrombogenic. The most promising is the ethylene-acrylic acid copolymer, neutralized to the extent of 60% with sodium ions. Another useful and related material is the vinyl acetate-crotonic acid copolymer. [Pg.485]

Chem. Descrip. Fluorosilicone sol n. in 2,6-dimethylheplan-4-one Uses Deaerating agent for PVC-copolymers, thermoplastic acrylics, all s, coatings... [Pg.838]

Isobutylene/isoprene copolymer, chlorinated rubber, aerospace components Fluorosilicone elastomer rubber, antivibration mounts Isobutylene/isoprene copolymer, chlorinated rubber, automotive EPM rubber... [Pg.5626]

Isobutylene/isoprene copolymer, brominated rubber, molded goods Fluorosilicone elastomer rubber, o-rings... [Pg.5626]

Fluorosilicone elastomer rubber, shoe soling compounds Styrene/isoprene/styrene block copolymer... [Pg.5626]

Methyl silicone Methyl fluorosilicone Ethylene glycol succinate Ethylene glycol succinate methyl-siloxane copolymer-type X Ethylene glycol succinate cyano-siloxane copolymer-type M... [Pg.459]

Guan, C.-M. Luo, Z.-H. Qiu, J.-J. Tang, P.-P., Novel Fluorosilicone Triblock Copolymers Prepared by Two-Step RAFT Polymerization Synthesis, Characterization, and Surface Properties. Eur. Polym. J. 2010, 46,1582-1593. [Pg.210]

Qiu, J.-J. Luo, Z.-H., Self-Assembly of ABC Nonamphiphilic Fluorosilicone Triblock Copolymers in Dilute Solution The First Example. J. Polym. Set, Part A Polym. Chem. 2011,49, 2513-2519. [Pg.213]

FKMs are coextruded with lower-cost copolymers such as etliylene acrylic copolymer. They can be modihed by blending and vulcanizing with other synthetic rubbers such as silicones, ethylene propylene rubber (EPR) and ethylene propylene diene monomer (EPDM) rubbers, epichlorohydrin, and nitriles. Fluoroelastomers are blended with modihed nitrile butadiene rubber (NBR) to obtain an intermediate performance-cost balance. These blends are useful for underhood applications in environments outside the engine temperature zone such as timing chain tensioner seals. Fluoroelastomers can also be blended with fluorosilicones and other high-temperature polymers to meet engine compartment environments and cost-performance balance. [Pg.215]

Various approaches have been taken to improve the properties of fluorosilicones. In this connection, Kobayashi et al. [17] synthesized several methyl-3,3,3-trifluoropropylsiloxane (F)-dimethylsiloxane (D) random and block copolymers. The random copolymers were prepared by equilibrium copolymetization starting from a mixture of cyclic F and D siloxanes with potassium silanolate as the catalyst The F-D block copolymer was prepared by sequential anionic living polymerization of strained cyclotrisiloxanes using a much weaker catalyst, lithium silanolate. The prepared copolymers were soluble in both tetrahydrofuran (THF) and... [Pg.272]

Luo et al. [6] used a polydimethylsiloxane macro-initiator to initiate polymerization of methacrylate monomers with fluorinated side groups to prepare fluorosilicone polymers. To obtain diblock copolymers with a low surface energy, they designed poly(dimethylsiloxane)-block-poly(2,2,3,3,4,4,4-heptafluorobutyl methacrylate) (PDMS-1 -PHFBMA) diblock copolymers by atom transfer radical polymerization (ATRP) technique. To initiate 2,2,3,3,4,4, 4-heptafluorobutyl methacrylate polymerization, bromine end-capped polydimethylsiloxane (PDMS-Br) was used as the macro-initiator. Scheme 6.5 shows a schematic representation of the PDMS-fc-PHFBMA diblock copolymers. The system was strictly deoxygenated... [Pg.274]

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