Source: http://www.google.de/patents/US6191194?hl=de
Timestamp: 2013-12-12 01:26:23
Document Index: 255904046

Matched Legal Cases: ['art 1', 'art 2', 'art 3', 'art 4', 'art 5', 'art 6']

Patent US6191194 - Silicon-treated carbon blacks surface treated with a silicone fluid or a silane - Google PatenteSuche Bilder Maps Play YouTube News Gmail Drive Mehr » Erweiterte Patentsuche | Anmelden Erweiterte Patentsuche PatenteSilicone rubber compositions are disclosed including a silicone polymer and a silicon-treated carbon black. The silicon-treated carbon blacks include a silicon-containing compound that is distributed through at least a portion of the carbon black aggregate. The silicon-treated carbon black is incorporated...http://www.google.de/patents/US6191194?utm_source=gb-gplus-sharePatent US6191194 - Silicon-treated carbon blacks surface treated with a silicone fluid or a silane Ver�ffentlichungsnummerUS6191194 B1PublikationstypErteilung AnmeldenummerUS 09/438,897 Ver�ffentlichungsdatum20. Febr. 2001Eingetragen12. Nov. 1999 Priorit�tsdatum15. Sept. 1995Geb�hrenstatusVerfallenAuch ver�ffentlicht unterCA2232066A1, DE69619536D1, DE69619536T2, DE69635464D1, DE69635464T2, EP0850268A1, EP0850268B1, EP1152028A2, EP1152028A3, EP1152028B1, US6020402, WO1997010291A1 Ver�ffentlichungsnummer09438897, 438897, US 6191194 B1, US 6191194B1, US-B1-6191194, US6191194 B1, US6191194B1 ErfinderJoginder N. Anand, John E. Mills, Steven R. ReznekUrspr�nglich Bevollm�chtigterCabot CorporationZitat exportierenBiBTeX, EndNote, RefManPatentzitate (72), Nichtpatentzitate (28), Referenziert von (5), Klassifizierungen (9), Juristische Ereignisse (4) Externe Links: USPTO, USPTO-Zuordnung, EspacenetSilicon-treated carbon blacks surface treated with a silicone fluid or a silaneUS 6191194 B1 Zusammenfassung Silicone rubber compositions are disclosed including a silicone polymer and a silicon-treated carbon black. The silicon-treated carbon blacks include a silicon-containing compound that is distributed through at least a portion of the carbon black aggregate. The silicon-treated carbon black is incorporated within a silicone rubber composition as an alternative reinforcing and extending filler, imparting higher hardness to elastomers formed from the composition, when compared to silicone rubber compositions incorporating an untreated carbon black.
Notwithstanding the above-noted properties, pure silicone rubber polymers, or polydimethyl siloxanes (also called �gums�), are weak elastomers. As a result, although silicone polymers may be used alone, rubber fabricators often compound silicone rubber elastomers from silicone gums or bases that contain reinforcing and/or extending fillers. In addition, these fillers are added to silicone rubber to increase their hardness and reduce their stickiness.
EXAMPLE I Silicon-treated carbon blacks, incorporated into silicone rubber compositions of the present invention, were prepared using a carbon black furnace reactor. The reactor included an XB-15 burner having a 2 inch transition and a single 0.030 inch oil tip. The reaction zone was 60 inches in length and had an ID of 6 inches. The reactor included injection ports positioned at 9 inches, 30 inches and 45 inches after the reactor's transition portion. The water-cooled quench zone included a single port having a #5 nozzle positioned 30 inches from the feedstock injection. The quench temperature was 1150� F. A summary of the production conditions are set forth in Table I below.
The production conditions were altered by adding a volatilizable silicon-containing compound into the reactor to obtain a silicon-treated carbon black. The flow rate of the volatilizable compound was adjusted to alter the weight percent of the silicon on the carbon black. The weight percent of silicon on the treated carbon black was determined by an ashing test, conducted according to ASTM procedure D-1506. Two samples of silicon-treated carbon black were prepared by introducing a silicon-containing volatilizable compound, tetraethoxy silane (TEOS), available from Huls America, Piscataway, N.J., into the hydrocarbon feedstock. For Samples 1 and 2, the TEOS was added through (1) the carbon black feedstock (FS) injection, and (2) the port positioned 9 inches after the transition into the reactor. Samples 3-5 of a silicon-treated carbon black were then prepared by injecting an organo-silicon compound, octamethyl-cyclotetrasiloxane (OMTS), available as �D-4� from Dow Corning Corporation, Midland, Mich., into the hydrocarbon feedstock. The D-4 was added (1) with the carbon black feedstock (FS) injections at two feed rates (resulting in 8% and 12% silicon on the carbon black), and (2) through the port positioned 9 inches after the transition into the reactor. A sixth, Baseline, sample included only carbon black made directly from feedstock, and resulted in a carbon black identified by the ASTM designation N234 (commercially available as Vulcan� 7H carbon black, available from Cabot Corporation, Boston, Mass.).
1.The feedstock used in all Samples is methylnaphthalene, fed at about 50� F. 2.Air was preheated to about 800� F. The resulting silicon-treated carbon blacks were analyzed for silicon content, surface area and silicon conversion efficiency. In addition, the pH and hydroxyl content were evaluated. These values were then compared to those of Cab-O-Sil� M-7D and MS-75D untreated fumed silicas (Cabot Corporation). In addition, the BET surface areas and the loss on drying (LOD), were measured for each sample. The BET surface area is measured by the adsorption of nitrogen. For the fumed silica, Carman surface areas (CSA) were measured. The CSA is an indirect method to measure structure, and is determined by air flow at very low pressures over a silica plug. The external surface area (t-Area) was measured for silicon-treated carbon blacks, following the sample preparation and measurement procedure described in ASTM D3037�Method A for Nitrogen surface area. The analytical results for pelleted samples dried in an electric oven are presented in Table II.
EXAMPLE III The silicon-treated carbon blacks prepared in EXAMPLE I were incorporated into silicone rubber compositions in addition to fumed silica reinforcing fillers. Cab-O-Sil� M-7D untreated fumed silica (Cabot Corporation) was used as the reinforcing filler in equal amounts with each of the silicon-treated carbon blacks prepared in EXAMPLE I, as well as the baseline carbon black. In addition, the effectiveness of the mixed silicon-treated carbon black/fumed silica filler was compared to systems incorporating 40 phr M-7D fumed silica reinforcing filler. Silicone rubber compositions, utilizing the low vinyl polymer composition of Example II were compounded using each of the fillers. The resulting products were cured and evaluated for Shore A hardness, tensile strength (psi), and elongation (%). The results are reported below in Table IV.
EXAMPLE IV A silicon-treated carbon black (8%TEOS@9″), prepared in EXAMPLE I (Sample 2), was treated with hexamethyl disilazane (HMDZ) prior to being incorporated into a silicone rubber composition. The HMDZ treated silicon-treated carbon black was produced by mixing 200 grams of the silicon-treated carbon black with 8 grams deionized water in a three liter plastic bag. The mixture was allowed to stand overnight. About 40 grams of HMDZ was then added to the mixture, which was allowed to stand overnight. The treated material was placed in a vented oven, at a temperature of about 125� C. for approximately 16 hours. The treated product produced was hydrophobic. About 40 phr of the HMDZ treated silicon-treated carbon black, and 40 phr M-7D untreated fumed silica, were incorporated into the low-vinyl silicone polymer of EXAMPLE II. The resultant compositions were evaluated for Shore A hardness, tensile strength, and elongation. The results are reported below in Table V.
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Okt. 2013Sennits, LlcDual comb hair accessory having planar stretch elements with embedded decorative designs* Vom Pr�fer zitiertKlassifizierungen US-Klassifikation523/212, 524/496, 523/215Internationale KlassifikationC08K3/04, C08K9/06 UnternehmensklassifikationC08K9/06, C08K3/04 Europ�ische KlassifikationC08K9/06, C08K3/04Juristische Ereignisse DatumCodeEreignisBeschreibung14. Apr. 2009FPExpired due to failure to pay maintenance feeEffective date: 2009022020. Febr. 2009LAPSLapse for failure to pay maintenance fees1. Sept. 2008REMIMaintenance fee reminder mailed29. Juni 2004FPAYFee paymentYear of fee payment: 4DrehenOriginalbildGoogle-Startseite - Sitemap - USPTO-Bulk-Downloads - Datenschutzerkl�rung - Nutzungsbedingungen - �ber Google Patente - Feedback gebenDaten bereitgestellt von IFI CLAIMS Patent Services.© 2012 Google