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公开(公告)号：WO02092607A8
公开(公告)日：2004-07-15
申请号：PCT/US0222501
申请日：2002-01-23
Applicant: GEN ELECTRIC
Inventor： GOSH NANCY E , RAZZANO JOHN S , RUBINSZTAJN SLAWOMIR
CPC classification number: C07F7/0876
Abstract: A process for the production of linear Silanol stopped siloxanes comprising: a) conducting a ring opening polymerization of a hexaorganocyclotrisiloxane having the formula: D3 = (R R SiO)3 where R and R are independently selected from the group of one to forty carbon atom monovalent radicals, in a solvent comprising a mixture of water and a volatile polar aprotic organic solvent in the presence of catalytic amounts of a strong base; b) neutralizing the catalytic amount of the strong base with a partially neutralized salt of a polybasic acid wherein the pH ranges from about 6 to about 8; and c) washing with water.
Abstract translation: 一种制备线性硅烷醇封端硅氧烷的方法，包括：a）进行具有下式的六有机基三硅氧烷的开环聚合：D3 =（R 1 R 2 SiO）3，其中R 1和R 2均为 在含有水和挥发性极性非质子有机溶剂的混合物的溶剂中，在催化量的强碱存在下，独立地选自一至四十个碳原子的单价基团; b）用多碱的部分中和盐中和强碱的催化量，其中pH范围为约6至约8; 和c）用水洗涤。
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公开(公告)号：JP2000256464A
公开(公告)日：2000-09-19
申请号：JP33911099
申请日：1999-11-30
Applicant: GEN ELECTRIC
Inventor： RAZZANO JOHN S , GOSH NANCY E
Abstract: PROBLEM TO BE SOLVED: To obtain a fluorosilicone polymer efficiently in a good yield while diminishing wastes by reacting a triorganosilanol with a fluorosilicone trimer in the presence of an alkali silanolate and neutralizing the alkali silanolate. SOLUTION: The triorganosilanol having a viscosity of 50-10,000,000 cP is reacted with the fluorosilicone trimer represented by formula I and having a viscosity of 50-1,000,000 cP at temperatures of 80-150 deg.C in the presence of an alkali silanolate containing 10-100 ppm of an alkali metal group to obtain a polymer solution containing a polymer of formula II and volatiles. Next, the polymer solution is stripped of volatiles at a temperature as high as 250 deg.C or below, and the alkali silanolate is neutralized to obtain a fluorosilicone polymer. In the formulae, R1 is a 1-8C monovalent hydrocarbon group; R2 is a 3-8C perfluoroalkylethylenyl; R3 is a 1-8C monovalent hydrocarbon group; and (x) is 3 or greater.
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公开(公告)号：JP2000248066A
公开(公告)日：2000-09-12
申请号：JP33911199
申请日：1999-11-30
Applicant: GEN ELECTRIC
Inventor： RAZZANO JOHN S , GOSH NANCY E
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing an organosilyl end-terminated diorganopolysiloxane fluid. SOLUTION: This production method comprises the following steps: (1) forming a reaction system by reacting an organic compound for terminating end groups with a trimer of fluorosilicone in the presence of a catalytic amount of linear phosphonitrilic acid; (2) forming a organosilyl end-terminated diorganopolysiloxane fluid containing volatile matter content by deactivating the linear phosphonitrilic acid.
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公开(公告)号：GB2345291A
公开(公告)日：2000-07-05
申请号：GB9926874
申请日：1999-11-12
Applicant: GEN ELECTRIC
Inventor： RAZZANO JOHN SIMON , GOSH NANCY E
Abstract: A process for making organosilyl end-stopped diorganopolysiloxane fluid is provided comprising the steps of reacting an organic end-stopping compound with a fluorosilicone trimer in the presence of a catalytic amount of linear phosphonitrillic acid, and inactivating the linear phosphonitrilic acid, thereby forming organosilyl end-stopped diorganopolysiloxane fluid. The fluoro-substituted cyclosiloxane is preferably 1,3,5-tris(3,3,3-trifluoropropyl)-1,3,5-trimethylcyclotrisiloxane. This is preferably reacted with hexamethyldisiloxane or trimethylchlorosilane with LPNC as a catalyst.
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Patent Agency Ranking
公开(公告)号：DE60224362T2
公开(公告)日：2008-12-18
申请号：DE60224362
申请日：2002-01-23
Applicant: GEN ELECTRIC
Inventor： GOSH NANCY E , RAZZANO JOHN S , RUBINSZTAJN SLAWOMIR
Abstract: A process for the production of linear silanol stopped siloxanes comprising: a) conducting a ring opening polymerization of a hexaorganocyclotrisiloxane having the formula:where R1 and R2 are independently selected from the group of one to forty carbon atom monovalent radicals, in a solvent comprising a mixture of water and a volatile polar aprotic organic solvent in the presence of catalytic amounts of a strong base; b) neutralizing the catalytic amount of the strong base with a partially neutralized salt of a polybasic acid wherein the pH ranges from about 6 to about 8; and c) washing with water.
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公开(公告)号：ES2296980T3
公开(公告)日：2008-05-01
申请号：ES02756491
申请日：2002-01-23
Applicant: GEN ELECTRIC
Inventor： GOSH NANCY E , RAZZANO JOHN S , RUBINSZTAJN SLAWOMIR
Abstract: Procedimiento para la producción de siloxanos lineales terminados en silanol, que comprende: a) efectuar una polimerización con apertura de anillo de un hexaorganociclotrisiloxano que tiene la fórmula: D3 = (R1R2SiO)3 en donde R1 y R2 se eligen independientemente del grupo consistente en radicales monovalentes de 1 a 40 átomos de carbono, en un disolvente que comprende una mezcla de agua y un disolvente orgánico aprótico, polar, volátil, en presencia de cantidades catalíticas de una base fuerte; y b) neutralizar la cantidad catalítica de la base fuerte con una sal parcialmente neutralizada de un ácido polibásico en donde el pH oscila entre 6 y 8.
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公开(公告)号：GB2345292A
公开(公告)日：2000-07-05
申请号：GB9926876
申请日：1999-11-12
Applicant: GEN ELECTRIC
Inventor： RAZZANO JOHN SIMON , GOSH NANCY E
Abstract: The invention comprises a method for producing fluorosilicone oil by reacting a fluorosilicone trimer with an end-stopping compound in the presence of an alkali silanolate. The polymer may be condensed to increase viscosity and decrease the silanol content of the polymer, and volatiles may be removed by stripping. The method provides a high yield of fluorosilicone oil of narrow viscosity ranges in an efficient reaction, and produces small amounts of waste. The preferred cyclotrisiloxane is 1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane. The end-stopper may be a tri-organosilanol such as dimethylvinylsilanol or trimethylsilanol or a di-organodisilanol.
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公开(公告)号：DE60224362D1
公开(公告)日：2008-02-14
申请号：DE60224362
申请日：2002-01-23
Applicant: GEN ELECTRIC
Inventor： GOSH NANCY E , RAZZANO JOHN S , RUBINSZTAJN SLAWOMIR
Abstract: A process for the production of linear silanol stopped siloxanes comprising: a) conducting a ring opening polymerization of a hexaorganocyclotrisiloxane having the formula:where R1 and R2 are independently selected from the group of one to forty carbon atom monovalent radicals, in a solvent comprising a mixture of water and a volatile polar aprotic organic solvent in the presence of catalytic amounts of a strong base; b) neutralizing the catalytic amount of the strong base with a partially neutralized salt of a polybasic acid wherein the pH ranges from about 6 to about 8; and c) washing with water.
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公开(公告)号：GB2345292B
公开(公告)日：2004-06-23
申请号：GB9926876
申请日：1999-11-12
Applicant: GEN ELECTRIC
Inventor： RAZZANO JOHN SIMON , GOSH NANCY E
Abstract: The invention comprises a method for producing fluorosilicone oil by reacting a fluorosilicone trimer with a triorganosilanol in the presence of an alkali silanolate. The polymer may be condensed to increase viscosity and decrease the silanol content of the polymer, and volatiles may be removed by stripping. The method provides a high yield of fluorosilicone oil of narrow viscosity ranges in an efficient reaction, and produces small amounts of waste.
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