Carbon resins

Polyester C rbon te Copolymers. Polyester carbonate resins have molecular stmctures composed of iso- and terephthalate units in conjunction with the standard bisphenol A PC moieties. 

Polyester carbonate resins are made by the interfacial process described for standard PC resins. The phthalate units are introduced by reaction of the appropriate phthaloyl dichlorides concurrent with the phosgenation. At present, Bayer, GE, and Miles produce polyester carbonate resins (47) sales volume is low, probably ca 100 t/yr. Polyester carbonates are used primarily in appHcations requiring 5—25°C higher heat-deflection temperature and better hydrolytic performance than are provided by standard PC resins. Properties are given in Table 9. 

The liquid is filtered, and on extraction with ether yields some pipe-ronal (heliotropin), melting at 37°. The residual liquid is boiled with magnesium carbonate-, resinous matter extracted with ether, the liquid filtered and the acid set free by means of dilute sulphuric acid. Homopiperonylic acid crystallises out on evaporation, and forms fine needles melting at 127° to 128°. 

A PET oligomer isolation method has utilised chloroform extraction in a Parr bomb lined with a Teflon-TFE fluoro-carbon resin [40]. The analytics of fluoropolymer processing aids (combustion analysis, XRF, EUR, 19F NMR, OM) have recently been described [29]. Combustion analysis (Parr Oxygen Bomb Calorimeter) can be used for quantitative analysis... 

Use of a heavy metal-catalyzed procedure as the final step requiring extensive carbon/resin treatments to reduce the metal contamination in API. 

Alsina J, Chiva C, Ortiz M, Rabanal F. Active carbonate resins for solid-phase synthesis through the anchoring of a hydroxyl function. Synthesis of cyclic and alcohol peptides. Tetrahedron Lett 1997 38 883-886 and references cited therein. 

Commercial carbon black is a spherical colloidal form of nearly pure carbon particles and aggregates with trace amounts of organic impurities adsorbed on the surface. Potential health effects usually are attributed to these impurities rather than to the carbon itself. Soots, by contrast, contain mixmres of particulate carbon, resins, tars, and so on, in a nonadsorbed state. ... 

Esemplare P (2006) Stabilizing poly (alkylene carbonate) resins for coatings. US 2006-639600 20061215... 

Carbonized Resins Saran Carbon Carbosive B, S Ambersorb XE-340,... 

Carbonized Resins. A special sorbent made by controlled thermal pyrolysis of polyvinylidene chloride (Dow developmental Adsorbent XF-4175L) (34) was shown to be three to five times more effective for the collection of highly volatile compounds, such as vinyl chloride (Figure 5) and methyl chloride, than the best available activated charcoal (31,36,37). Although this sorbent is not commercially available, Carbosive and Carbosive S show similar collection properties and they are available from gas chromatographic supply houses or may be obtained already packed in small collection tubes (SKC Inc., Eighty Four, PA). 

Bifunctionally tagged Mitsunobu reagents 21 and 22, quaternary ammonium carbonate resin 65, tetrafluorophthalic anhydride (as a solution-phase linking reagent), and amine-functionalized resin 2 were used in a three-step solution-phase synthesis of a series of substituted hydroxypiperidines.39 No further purification (e.g., liquid-phase extraction or chromatography) was required, and products were isolated in good yields and purities. 

Nitrophenol carbonate resin 24 (320 g, 544.0 mmol) was swelled in anhydrous DMF (5 liters) in a 12-liter three-necked round-bottom flask. Argon gas was bubbled through this slurry for 1 h while stirring with an overhead stirrer. In a second 3-liter three-necked round-bottom flask, anhydrous DMF (500 ml) and BSA (1.5 liter) were added. This solution was degassed for 1 h by bubbhng argon gas through the solution. 

Carbonate resins are generally used to neutralize strong mineral acids (e.g., HBr) when generated in situ as a by-product on certain reactions. These resins normally contain a quaternary ammonium carbonate salt functionality. Specific examples are triethylammonium carbonate (7) and trimethylammonium bicarbonate (8) resins (Fig. 5) ion exchanging the anionic halogen for carbonate. 

Some useful resins that have found their way into quite substantial applications are the carbonate resins. For instance, trimethylammonium bicarbonate resin (8) is used to neutralize carboxylic acids or strong mineral acids formed in situ in specific reactions. An interesting example is the quenching/scavenging of acid bromide reported by Staufer and Kat-zenellenbogen74 during the synthesis of tetra-substituted pyrazoles (40) from immobilized starting materials as seen in Fig. 18. 

Due to the thermal destruction and polymerisation of chlorothiophene and MTDCS, there are also small amounts of carbon, resinous products and gases (HC1 and H2) formed. Resinous and solid products remain on the walls of the synthesis reactor. 

Iron iron Alu- Indus- Carbon resins Acrylic chlo- nonmetallic... 

Fluor-carbon resin, aqueous based for soil-, oil- and water-repellent finish. 

Fatty ethoxylate polyester Fatty glyceride blend Fatty imidazoline Fatty imidazoline salt Fatty taurates Fluor-carbon resin Fluorochemical... 

From TG/DTA analysis of the dried resin with Fe, the resin was found to show a major weight loss with an exothermic thermal decomposition at 473 873 K followed by a slight endothermic weight decrease at above 873K. About 20wt% of the carbonized resin remained at 1273K. 

Nix-Stix L-806 [Dwight]. TM for a fluor-carbon resin emulsifier in water. 

C and then falling at higher carbonization temperatures Attempts to use this property to make molecular sieves have shown some success, but information on how micropores form and develop in carbonizing resins is limited. 

Fox, D.W. Aromatic Carbonate Resins and Preparation Thereof US Patent 3,153,008, October 13, 1964. 

General procedure for Ugi reaction with support-bound isonitrile [346] A 1.2 m solution of 2-chlorobenzylamine (0.133 mL, 1.1 mmol) and 2-phenylpropio-naldehyde (0.146 mb, 1.1 mmol) in trimethylorthoformate (TMOF) was allowed to react for 30 min. (]3-Isocyano-ethyl)-alkyl-carbonate resin (126 mg, 110 pmol, 0.87 mmol g ) was suspended in 1,2-dichloroethane (1.75 mL) in a 5-mL Bohdan fritted reaction tube and allowed to stand for 15 min. The 1.2 M solution ofimine in trimethylorthoformate was added to the resin, and... 

In another attractive approach for synthesizing 3,4,5-trisubstituted 1,2,4-triazoles, the molecules are built up from a-amino adds anchored through their amino function to an activated carbonate resin [94]. These urethane-Hnked a-amino acids are coupled with amines. After conversion to thioamides, the trisub-stituted triazoles are obtained by treatment with hydrazines in the presence of Hg(OAc)2. 

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