专利号:US-8642792-B2 优先权日:2007-02-15 标题 :Method for the synthesis of omega-amino-alkanoic acids 发明人:DUBOIS JEAN-LUC 权利人:DUBOIS JEAN-LUC; ARKEMA FRANCE 摘要:The invention relates to a method for the synthesis of amino acids/esters of general formula NH 2 —(CH 2 ) n —COOR in which n is an integer between 5 and 14, and R is either H or an alkyl radical including from 1 to 4 carbon atoms, from natural long-chain mono-unsaturated fatty acids or esters including at least 10 adjacent carbon atoms per molecule, said method comprising: first converting, if necessary, said natural long-chain fatty acid or ester into a monounsaturated fatty acid/ester of general formula R 1 —(CH 2 ) m —CHâ•?CH—(CH 2 ) p —COOR in which R 1 is H, CH 3 or a COOR radical, m is an integer between 0 and 14 and p is an integer between 2 and 11, then submitting the latter to a crossed catalytic metathesis reaction with a compound of formula R 2 —CHâ•?CH—R 3 in which R 2 is either H or CN and R 3 is CN or CH 2 NH 2 , provided that if R 2 is CN, R 3 can be only CN, and finally converting the resulting product of the general formula R 3 —CHâ•?CH—(CH 2 ) p —COOR into an amino-acid, either by hydrogenation, or by hydrogenation of the trple terminal bond, or by amination of the double terminal bond.
专利号:US-9567293-B2 优先权日:2013-02-08 标题 :Combined synthesis of a nitrile-ester/acid and of a diester/diacid 发明人:DUBOIS JEAN-LUC; COUTURIER JEAN-LUC; BRANDHORST MARKUS 权利人:ARKEMA FRANCE 摘要:A method for the combined synthesis of a mono-unsaturated nitrile-ester(acid) and of a bi-functional carbonyl compound, wherein it includes a step including the cross metathesis mc1 of an unsaturated fatty acid/ester compound with an unsaturated nitrile compound, in which mc1 is performed with partial conversion such as to obtain and recover, separately, at least the following products: a mono-unsaturated nitrile-ester/acid and a symmetrical compound, diester or diacid respectively including a double bond located in the middle of the molecular chain of compound, and subsequently a step including the oxidation cleavage cp2 of the double bond of compound, such as to form a single type of carbonyl compound having formula R2-(CH2)n-COR′, in which R′ is H or OH, depending on the operating conditions selected for the oxidation cleavage cp2. Also, the production of monomers for the polymer industry.
专利号:US-4303593-A 优先权日:1979-06-16 标 题 :Process for the dimerization of hexafluoropropene oxide 发明人:KUEHNE GERHARD 权利人:HOECHST AG 摘要:In the dimerization of hexafluoropropene oxide to give oligomeric acid fluorides of the formula the ratio of the oligomeric constituents formed is directed, in an improved manner, towards the formation of the dimer (n=0) if the reaction is carried out in the presence of a catalyst system which consists of a mixture of a copper (I) compound and a copper (II) compound mixed with a complex-forming agent from the group of the nitriles, isocyanides, tertiary phosphines and cyclic hydrocarbons with 6 to 12 ring atoms and 2 to 3 double bonds in the ring, and an aprotic organic solvent. The dimer is an intermediate product in the synthesis of perfluoropropyl perfluorovinyl ether, the latter being employed as a comonomer in fluorine-containing copolymers.
专利号:US-5556924-A 优先权日:1993-11-01 标题 :Synthesis of photoreactive polymeric binders 发明人:FITZGERALD MAURICE J; KEARNEY FREDERICK R; LIANG RONG-CHANG; SCHWARZEL WILLIAM C 权利人:POLAROID CORP 摘要:A photoreactive binder that may be used to enhance photospeed in either conventional plates or on-press developable lithographic printing plates. Briefly, a polymer of m-isopropenyl- alpha , alpha -dimethylbenzyl isocyanate is derivatized for vinyl group reactivity by reacting the isocyanate groups thereof with hydroxyalkyl acrylate. The resulting photopolymeric binder provides significantly higher photospeed than the non-reactive binder currently utilized in the production of conventional printing plates. The resulting lithographic printing plate also shows better durability (as manifested by longer run-length) and is more easily developed by the microencapsulated developers utilized in the present invention. As to the preparation of the photoreactive binders, the application discloses a method of copolymerizing m-isopropenyl- alpha , alpha -dimethylbenzyl isocyanate (m-TMI) through complexation with an electron-deficient monomer such as maleic anhydride to accelerate free radical copolymerization with other monomers, and thus, provides greater monomer-to-polymer conversion. Use of the resulting product in the photoresist of a lithographic printing plate improves its adhesion to an underlying substrate.
专利号:US-5587431-A 优先权日:1995-04-21 标 题 :Synthesis of terminally unsaturated oligomers 发明人:GRIDNEV ALEXEI A; ITTEL STEVEN D 权利人:DU PONT 摘要:This invention relates to a method for preparing compositions comprising terminally unsaturated polymers of low molecular weight, referred to as oligomers or macromonomers. In particular, a first oligomer composition is obtained by free radical polymerization of a reaction mixture comprising monomers. Terminally unsaturated oligomers in the first oligomer composition, or a selected portion of the composition, are reinitiated into free radicals in order to continue their oligomerization to a desired endpoint. The process is useful for preparing an oligomer composition having a controlled degree of polymerization. The process is also useful for preparing block copolymers. Such oligomer compositions or block polymers are useful for preparing engineered or structured polymers used in making various end products, including plastics, coatings, films, and dispersants.
专利号:US-8877948-B2 优先权日:2008-10-08 标 题:Synthesis process of polyol carbonate from polyols, conducted in using a solvent selective for polyols carbonates 发明人:DUBOIS JEAN-LUC; ARESTA MICHELE; DIBENEDETTO ANGELA; FERRAGINA CARLA; NOCITO FRANCESCO 权利人:DUBOIS JEAN-LUC; ARESTA MICHELE; DIBENEDETTO ANGELA; FERRAGINA CARLA; NOCITO FRANCESCO; ARKEMA FRANCE 摘要:The present invention relates to a synthesis process of polyol carbonate, such as glycerol carbonate, from polyols such as glycerol, propylene glycol or ethylene glycol and urea conducted in using a solvent selective for polyols (glycerol) carbonates. Said process comprises reacting polyol with urea in the presence of a catalyst, extracting produced NH 3 and in addition in the presence in the course of at least one step of the process of a selective solvent for polyol carbonate allowing to extract it from the reaction medium.