sodium;octane-1-sulfonate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A VF2/HFP/TFE copolymer fluoroelastomer was prepared by a continuous emulsion polymerization process of the invention, carried out at 110° C. in a well-stirred 2.0-liter stainless steel liquid full reaction vessel. An aqueous solution, consisting of 2.16 g/hour (g/h) ammonium persulfate initiator, 0.87 g/h sodium hydroxide, 1.31 g/h sodium octyl sulfonate, and 0.98 g/h isopropanol chain transfer agent in deionized water, was fed to the reactor at a rate of 5.0 L/hour. The reactor was maintained at a liquid-full level at a pressure of 6.2 MPa by means of a backpressure control valve in the effluent line. After 30 minutes, polymerization was initiated by introduction of a gaseous monomer mixture consisting of 395 g/h vinylidene fluoride (VF2), 507 g/h hexafluoropropylene (HFP), and 309 g/h tetrafluoroethylene (TFE) fed through a diaphragm compressor. After 2.0 hours, collection of effluent dispersion was begun and collection continued for 5 hours. The effluent polymer latex, which had a pH of 2.67 and contained 18.5 wt. % solids, was separated from residual monomers in a degassing vessel at atmospheric pressure. carried out at 110° C. in a well-stirred 2.0-liter stainless steel liquid full reaction vessel The reactor was maintained at a liquid-full level at a pressure of 6.2 MPa by means of a backpressure control valve in the effluent line polymerization After 2.0 hours collection of effluent dispersion collection continued for 5 hours was separated from residual monomers in a degassing vessel at atmospheric pressure

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Reaction between styrene and methyldichlorosilane with platinum catalyst in the presence of sodium 1-octanesulfonate. 624 mg Styrene and 732 mg methyldichlorosilane were introduced into a glass tube, and 40 mg of sodium 1-octanesulfonate were added. 0.9 mg Of a toluene solution of a 0-valent platinum complex of divinylsiloxane (0.4 wt % platinum content) was added. The tube was sealed and placed in a 100° C. oil bath where it was heated for 20 hours. After cooling, the tube contents were analyzed by gas chromatography revealing a styrene conversion of 71% and a phenethylmethyldichlorosilane yield of 46%. The ratio between the phenethylmethyldichlorosilane and the (α-methylbenzyl)methyldichlorosilane was 18:1. The tube was sealed placed in a 100° C. was heated for 20 hours After cooling

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Reaction between styrene and methyldichlorosilane with platinum catalyst in the presence of sodium 1-octanesulfonate. 624 mg Styrene and 732 mg methyldichlorosilane were introduced into a glass tube, and 40 mg of sodium 1-octanesulfonate were added with a microsyringe. 0.9 mg Of a toluene solution of a 0-valent platinum complex of divinylsiloxane (0.04 wt % platinum content) was added. The tube was sealed with Teflon tape and a rubber septum and then placed in a 100° C. oil bath where it was heated for 20 minutes. After cooling, the tube contents were analyzed by gas chromatography revealing a styrene conversion of 71% and a phenethylmethyldichlorosilane yield of 46%. The ratio between the phenethylmethyldichlorosilane and the (α-methylbenzyl)methyldichlorosilane was 18:1. placed in a 100° C. was heated for 20 minutes After cooling

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: HPLC analysis indicated substantially pure 4-(2-piperidinoethoxy)benzoic acid, hydrochloride with only minor amounts of the methyl ester. The HPLC analysis was conducted as follows: A Zorbax C8 column was used (length: 25 cm; diameter: 4.6 mm; particle size: 5 microns). A weak eluent (60 mM phosphate and 10 mM octane sulfonate) was prepared by combining 6.48 g sodium 1-octanesulfonate and 12 mL HPLC grade concentrated phosphoric acid. This mixture was diluted to 3 L with HPLC, water and the resulting solution was adjusted to pH 2 with sodium hydroxide. Acetonitrile was employed as a strong eluent. A solution of 60% weak eluent, 40% strong eluent was applied to the column at a flow rate of 1 mL/minute; detection--247 nm. Under the foregoing conditions, elution of the methyl ester occurred in five minutes; the unreacted acid eluted in 3.5 minutes. Under the foregoing conditions, elution of the methyl ester the unreacted acid eluted in 3.5 minutes

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A VF2/HFP/TFE copolymer fluoroelastomer was prepared by a continuous emulsion polymerization process of the invention, carried out at 115° C. in a well-stirred 4.0-liter stainless steel liquid full reaction vessel. An aqueous solution, consisting of 3.74 g/hour (g/h) ammonium persulfate, 11.26 g/h sodium phosphate dibasic heptahydrate, 3.75 g/h sodium octyl sulfonate, and 2.4 g/h isopropanol in deionized water, was fed to the reactor at a rate of 10 L/hour. The reactor was maintained at a liquid-full level at a pressure of 6.2 MPa by means of a back-pressure control valve in the effluent line. After 30 minutes, polymerization was initiated by introduction of a gaseous monomer mixture consisting of 594 g/h tetrafluoroethylene (TFE), 1119 g/h vinylidene fluoride (VF2), and 897 g/h hexafluoropropylene (HFP) fed through a diaphragm compressor. After 2.0 hours, collection of effluent dispersion was begun and continued for 5 hours. The effluent polymer dispersion, which had a pH of 4.1 and contained 19.9 wt. % solids, was separated from residual monomers in a degassing vessel at atmospheric pressure. Fluoroelastomer product was isolated using calcium nitrate solution. The coagulated polymer was allowed to settle, supernatant serum was removed, and the polymer was washed by reslurrying in water three times before filtering. The wet crumb was dried in an air oven at approximately 50-65° C. to a moisture content of less than 1%. About 12 kg of polymer was recovered at an overall conversion of 94.6%. The product, comprised of 24.0 wt. % TFE units, 45.0 wt. % VF2 units, and 31.0 wt. % HFP units, was an amorphous elastomer having a glass transition temperature of−14° C., as determined by differential scanning calorimetry (heating mode, 10° C./minute, inflection point of transition). Inherent viscosity of the elastomer was 0.76 dL/g, measured at 30° C. in methyl ethyl ketone, and Mooney viscosity, ML(1+10), was 64. carried out at 115° C. in a well-stirred 4.0-liter stainless steel liquid full reaction vessel The reactor was maintained at a liquid-full level at a pressure of 6.2 MPa by means of a back-pressure control valve in the effluent line polymerization After 2.0 hours collection of effluent dispersion continued for 5 hours was separated from residual monomers in a degassing vessel at atmospheric pressure

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: HPLC analysis indicated substantially pure 4-(2-piperidinoethoxy)benzoic acid, hydrochloride with only minor amounts of the methyl ester. The HPLC analysis was conducted as follows: A Zorbax C8 column was used (length: 25 cm; diameter: 4.6 mm; particle size: 5 microns). A weak eluent (60 mM phosphate and 10 mM octane sulfonate) was prepared by combining 6.48 g sodium 1-octanesulfonate and 12 mL HPLC grade concentrated phosphoric acid. This mixture was diluted to 3 L with HPLC, water and the resulting solution was adjusted to pH 2 with sodium hydroxide. Acetonitrile was employed as a strong eluent. A solution of 60% weak eluent, 40% strong eluent was applied to the column at a flow rate of 1 mL/minute; detection -247 nm. Under the foregoing conditions, elution of the methyl ester occurred in five minutes; the unreacted acid eluted in 3.5 minutes. Under the foregoing conditions, elution of the methyl ester the unreacted acid eluted in 3.5 minutes

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A VF2/HFP/TFE copolymer fluoroelastomer was prepared by a continuous emulsion polymerization process, carried out at 115° C. in a well-stirred 2.0-liter stainless steel liquid full reaction vessel. An aqueous solution, consisting of 2.09 g/hour (g/h) ammonium persulfate initiator, 0.84 g/h sodium hydroxide, 1.80 g/h sodium octyl sulfonate, and 1.01 g/h isopropanol chain transfer agent in deionized water, was fed to the reactor at a rate of 5.0 L/hour. The reactor was maintained at a liquid-full level at a pressure of 6.2 MPa by means of a backpressure control valve in the effluent line. After 30 minutes, polymerization was initiated by introduction of a gaseous monomer mixture consisting of 730 g/h vinylidene fluoride (VF2), 384 g/h hexafluoropropylene (HFP), and 130 g/h tetrafluoroethylene (TFE) fed through a diaphragm compressor. After 2.0 hours, collection of effluent dispersion was begun and collection continued for 6 hours. The effluent polymer latex, which had a pH of 4.52 and contained 20.12 wt. % solids, was separated from residual monomers in a degassing vessel at atmospheric pressure. carried out at 115° C. in a well-stirred 2.0-liter stainless steel liquid full reaction vessel The reactor was maintained at a liquid-full level at a pressure of 6.2 MPa by means of a backpressure control valve in the effluent line polymerization After 2.0 hours collection of effluent dispersion collection continued for 6 hours was separated from residual monomers in a degassing vessel at atmospheric pressure