| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | METHOD FOR PRODUCING OXYMETHYLENE COPOLYMER | US14400075 | 2013-05-10 | US20150112018A1 | 2015-04-23 | Daigo Nakaya; Tsutomu Miyoshi; Akira Ito; Satoshi Mochida |
| The present invention is directed to a method for producing an oxymethylene copolymer by subjecting trioxane and 1,3-dioxolane to copolymerization using boron trifluoride or a coordination compound thereof as a catalyst, wherein the copolymerization is conducted in the presence of a steric-hindrance phenol in an amount of 0.006 to 2.0% by weight, based on the weight of the trioxane, using 0.01 to 0.07 mmol of boron trifluoride or a coordination compound thereof as a catalyst, relative to 1 mol of the trioxane, and wherein, at a point in time when the polymerization yield becomes 92% or more, the formed oxymethylene copolymer and a polymerization terminator are contacted to terminate the polymerization. | ||||||
| 82 | Process for Recycling Polyacetals | US14359333 | 2012-11-23 | US20140343302A1 | 2014-11-20 | Michael Haubs; Jurgen Lingnau; Klaus Kurz |
| A process for recycling polyoxymethylene polymers is disclosed. A polyoyxmethylene polymer is at least partially dissolved in an aprotic compound. The resulting solution or suspension (liquid mixture) is then contacted with a catalyst which causes the polyoxymethylene polymer to be converted into a cyclic acetal. The cyclic acetal can be separated, collected and used in other processes. In one embodiment, the cyclic acetal may be used to produce a polyoxymethylene polymer. | ||||||
| 83 | Process for Recycling A Formaldehyde Source During A Polymerization Process | US14359308 | 2012-11-23 | US20140323686A1 | 2014-10-30 | Klaus Kurz; Jurgen Lingnau; Michael Haubs; Michael Hoffmockel; Damian Feord |
| A process for recovering volatile components from an oxymethylene polymer process is disclosed. The volatile components are removed from the process and the formaldehyde collected is converted to a cyclic acetal. The formaldehyde is converted to a cyclic acetal by contacting the formaldehyde with a catalyst in the presence of an aprotic solvent. | ||||||
| 84 | Process For The Production of Trioxane | US14359319 | 2012-11-23 | US20140316147A1 | 2014-10-23 | Michael Haubs; Klaus Kurz; Jurgen Lingnau |
| The present invention relates to a process for producing cyclic acetal comprising i) preparing a liquid reaction mixture comprising a) formaldehyde source, b) an aprotic compound and c) a catalyst; and ii) converting the formaldehyde source into cyclic acetals. | ||||||
| 85 | WETTABLE, HIGH STRENGTH FOAM ESPECIALLY FOR INK HOLDERS | US13786596 | 2013-03-06 | US20140256838A1 | 2014-09-11 | Joseph W. Lovette; Saranya Maungnoi |
| A wettable, high strength, ether foam, particularly suited for ink holders, that includes a prepolymer that is formed before adding it to other components in the foam formulation. | ||||||
| 86 | Oxymethylene polymers and process for the preparation thereof | US12787698 | 2010-05-26 | US08481671B2 | 2013-07-09 | Michael Haubs; Michael Hoffmockel; Jurgen Lingnau; Robert M. Gronner; Lowell Larson |
| The present invention relates to a process for the preparation of oxymethylene polymers as well as oxymethylene polymers obtainable therefrom. The process includes polymerization of a monomer, which forms —CH2—O— units in the presence of an acetal of formaldehyde or a polyhydric alcohol and an initiator for cationic polymerization. The initiator may be a heteropoly acid or an acid salt thereof which is dissolved in an alkyl ester of a polybasic carboxylic acid. | ||||||
| 87 | Initiator | US13527356 | 2012-06-19 | US20120259089A1 | 2012-10-11 | Michael Hoffmockel; Michael Haubs; Horst Röschert |
| An initiator for cationic polymerization comprises a salt of a protic acid as well as a protic add. The molar ratio of protic acid to salt is in the range from 1:0.01 to 1:2000. The initiator is used for example for cationic homo- or copolymerization of trioxane, and permits stable and flexible operation of the polymerization. | ||||||
| 88 | Oxymethylene Polymers and Process for the Preparation Thereof | US12787698 | 2010-05-26 | US20110077378A1 | 2011-03-31 | Michael Haubs; Michael Hoffmockel; Jürgen Lingnau; Robert M. Gronner; Larson Lowell |
| The present invention relates to a process for the preparation of oxymethylene polymers as well as oxymethylene polymers obtainable therefrom. The process includes polymerization of a monomer, which forms —CH2—O— units in the presence of an acetal of formaldehyde or a polyhydric alcohol and an initiator for cationic polymerization. The initiator may be a heteropoly acid or an acid salt thereof which is dissolved in an alkyl ester of a polybasic carboxylic acid. | ||||||
| 89 | Method for producing polyoxymethylenes | US11720414 | 2005-11-28 | US07863393B2 | 2011-01-04 | Jens Assmann; Knut Zollner; Johannes Heinemann; Elmar Stockelmann; Achim Stammer |
| Process for preparation of polyoxymethylenes via polymerization of the monomers a) in the presence of cationic initiators b), and also, if appropriate, in the presence of regulators c), and subsequent deactivation and isolation of the polymer, which comprises undertaking the polymerization in a tubular reactor with static mixing elements and with a mixing zone, a polymerization zone, and a deactivation zone, the diameter of the tubular reactor in the mixing zone being <90% of the diameter in the polymerization zone. | ||||||
| 90 | Method for Producing Polyoxymethylenes | US11720414 | 2005-11-28 | US20080167439A1 | 2008-07-10 | Jens Assmann; Knut Zollner; Johannes Heinemann; Elmar Stockelmann; Achim Stammer |
| Process for preparation of polyoxymethylenes via polymerization of the monomers a) in the presence of cationic initiators b), and also, if appropriate, in the presence of regulators c), and subsequent deactivation and isolation of the polymer, which comprises undertaking the polymerization in a tubular reactor with static mixing elements and with a mixing zone, a polymerization zone, and a deactivation zone, the diameter of the tubular reactor in the mixing zone being <90% of the diameter in the polymerization zone. | ||||||
| 91 | Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose | US11405140 | 2006-04-17 | US20060252912A1 | 2006-11-09 | Michael Hoffmockel; Matthias Kramer; Karl-Friedrich Muck; Horst Roschert |
| Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose An apparatus is described for preparing polyoxymethylene homo- and copolymers. This has the following elements: A) reactor (1) encompassing a polymerization zone (2) and a deactivation zone (3) directly downstream thereof for polymerizing and deactivating polyoxymethylene homo- and copolymers in a homogeneous phase in a manner known per se, B) depressurizing assembly (4), which, if appropriate, has a metering apparatus (5) for additives for the polymer, C) pelletizer (6), D) extraction apparatus (7), and E) if appropriate, a drying apparatus (8). Use of the apparatus and of the polymerization process carried out therein can achieve particularly low residual monomer contents in a simple manner which saves energy. | ||||||
| 92 | Process for the preparation of acetal polymers | US10939136 | 2004-09-10 | US20050059797A1 | 2005-03-17 | Michael Haubs; Stanislaw Penczek |
| The present invention relates to a process for the preparation of acetal polymers, in particular of polyoxymethylene (POM) by cationic polymerization where organophosphonic and/or organophosphinic acids and/or their derivatives and/or their precursors are used as the initiator. | ||||||
| 93 | Preparation of polyoxymethylenes | US10203285 | 2002-08-08 | US06756475B2 | 2004-06-29 | Marian Mours; Rainer Anderlik; Gitta Egbers; Michael Kirschey; Martin Roos |
| Continuous process for preparing polyoxymethylene homo- or copolymers by bulk polymerization of the monomers in the presence of cationic initiators, and also, if desired, in the presence of regulators, where during the polymerization both the monomers and the polymer are present in molten form and, if desired, the polymer is then deactivated, and the melt is discharged, cooled and pelletized, which comprises discharging, cooling and pelletizing the polymer at an elevated pressure and in the presence of a liquid. | ||||||
| 94 | Photo-curable resin composition containing cyclic acetal compound and cured product | US10613746 | 2003-07-07 | US20040110857A1 | 2004-06-10 | Hiroyuki Kanai |
| The present invention provides a photo-curable resin composition composed of (A) a cyclic acetal compound, (B) an epoxy compound, and (C) a photocationic polymerization initiator, which has a low viscosity and which can be completely cured into the inside thereof in a short period of irradiation time. | ||||||
| 95 | Process for the non-oxidative preparation of formaldehyde from methanol | US10176997 | 2002-06-21 | US20030065228A1 | 2003-04-03 | Elke Schweers; Rolf Schulz; Thomas Kaiser; Uwe Dingerdissen |
| In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000null C., the catalyst is generated spatially separately from the reactor and at a temperature above the dehydrogenation temperature. | ||||||
| 96 | Process for the non-oxidative preparation of formaldehyde from methanol | US09424981 | 2000-02-22 | US06448448B1 | 2002-09-10 | Elke Schweers; Rolf Schulz; Thomas Kaiser; Uwe Dingerdissen |
| The invention relates to a method for producing formaldehyde from methanol by non-oxidative dehydrogenation, in a reactor, in the presence of a catalyst at a temperature between 300 and 1000° C. Said method is characterized in that the generation of the catalyst takes place spatially separate from the reactor and at a temperature greater than the dehydrogenation. | ||||||
| 97 | Polyoxymethylene resin composition | US10024203 | 2001-12-21 | US20020115790A1 | 2002-08-22 | Makoto Doki; Hideki Nakamura |
| Provided is a polyoxymethylene resin composition which comprises (I) 100 parts by weight of a polyoxymethylene polymer and (II) 1-200 parts by weight of a thermoplastic elastomer having a main dispersion peak temperature of null30null C. to null50null C. in a tan null curve obtained by the measurement of viscoelasticity and having a number average molecular weight of 10,000-500,000. Since moldings obtained from this resin composition simultaneously satisfy both the good frictional wear characteristics and the high vibration damping performances, they can be suitably employed for the uses such as vibration-proof sliding components in the fields of precision machines, OA appliances and automobiles. | ||||||
| 98 | Process for producing oxymethylene copolymer | US85578101 | 2001-05-16 | US6433128B2 | 2002-08-13 | NAKAMURA TAKAHIRO; OKAMURA AKIRA; FURUKAWA MASANORI; MASUMOTO ISAMU; YOSHIOKA KANEO; MAJI KAZUMASA |
| A process for producing an oxymethylene copolymer by polymerizing trioxan and 1,3-dioxolan in the presence of a cationically active catalyst, wherein(1) 1,3-dioxolan is used in an amount of 0.01 to 2.9 mol % based on trioxan; and(2) the cationically active catalyst is used in an amount of 1x10-7 to 1.2x10-4 mol based on 1 mol of trioxan. The process of the present invention makes it possible to obtain at a high yield an oxymethylene copolymer which has almost as high mechanical strength and stiffness as an oxymethylene homopolymer while retaining the tenacity and heat stability of an oxymethylene copolymer. | ||||||
| 99 | Process for the preparation of trioxane and polyoxymethylene copolymers | US09901223 | 2001-07-09 | US06388102B2 | 2002-05-14 | Elke Schweers; Thomas Kaiser; Michael Haubs; Michael Rosenberg |
| Processes for making trioxane, polyoxymethylene and polyoxymethylene copolymers from formaldehyde, made by the dehydrogenation of methanol in the presence of a catalytic active species set free from a sodium compound, at a temperature in the range of 300° C. to 1000° C., wherein a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor. | ||||||
| 100 | Process for producing oxymethylene | US09855781 | 2001-05-16 | US20020007044A1 | 2002-01-17 | Takahiro Nakamura; Akira Okamura; Masanori Furukawa; Isamu Masumotoi; Kaneo Yoshioka; Kazumasa Maji |
| A process for producing an oxymethylene copolymer by polymerizing trioxan and 1,3-dioxolan in the presence of a cationically active catalyst, wherein (1) 1,3-dioxolan is used in an amount of 0.01 to 2.9 molt based on trioxan; and (2) the cationically active catalyst is used in an amount of 1null10null7 to 1.2null10null4 mol based on 1 mol of trioxan. The process of the present invention makes it possible to obtain at a high yield an oxymethylene copolymer which has almost as high mechanical strength and stiffness as an oxymethylene homopolymer while retaining the tenacity and heat stability of an oxymethylene copolymer. | ||||||
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