- PREPARATION OF DIESTERS OF (METH)ACRYLIC ACID FROM EPOXIDES
-
The application relates to a process for preparing a (meth)acrylic acid diester by reacting a (meth)acrylic acid anhydride with an epoxide in the presence of a catalyst system comprising a first and/or second catalyst in combination with a co-catalyst. The first catalyst is a halide of Mg or a trifluoromethanesulfonate of a rare earth element; the second catalyst is a Cr(lll) salt; and the co- catalyst is a tertiary amine, a quaternary ammonium salt, a tertiary phosphine or a quaternary phosphonium salt.
- -
-
Page/Page column 31-32
(2020/03/05)
-
- Method for producing hydroxyethyl methacrylate through ester exchange method
-
The invention discloses a method for producing hydroxyethyl methacrylate through an ester exchange method, and belongs to a chemical synthesis method. The method comprises the following steps: using methyl methacrylate and ethylene glycol as raw materials, using p-toluene sulfonic acid as a catalyst, using phenothiazine as a polymerization inhibitor, and performing a reaction under the condition of the temperature of 100-120 DEG C so as to prepare a target product. The method disclosed by the invention is safe and simple; compared with catalysts of hexadecyl trimethyl ammonium hydroxide, potassium cyanide, heavy metallic salt type catalysts and the like, the catalyst used in the method disclosed by the invention, namely the p-toluene sulfonic acid, is lower in price, easier to obtain, easier to store and use, smaller in pollution, and better in cooperation use effect with the polymerization inhibitor, and the method is easy in industrialization application.
- -
-
Paragraph 0015-0045
(2019/01/23)
-
- PREPARATION METHOD OF ETHYLENE GLYCOL DI(METH)ACRYLATE
-
The present invention refers to polymerization stop number and in the presence of catalyst, (metadata) ethylene glycol monomer and methacrylic view at a molar ratio from 1:4, 10:1 to 2:1 and reacting the synthesized at the 250 °C to 90 °C; and said after start synthesis reaction, catalyst of which a metal is added further or more times 1 ; including a , ethylene glycol di (metadata) microorganism of the genus ascochyta and use relates to manufacturing method.
- -
-
Paragraph 0028-0031
(2016/12/12)
-
- METHOD FOR PRODUCING IRON CARBONATE
-
The purpose of the present invention is to provide a method for producing an iron carbonate, whereby it becomes possible to prevent the generation of hydrogen during the production of the iron carbonate by the reaction of a carboxylic acid with metal iron. An embodiment of the present invention is a method for producing an iron carbonate by reacting metal iron with a carboxylic acid in a reaction solution, wherein a compound of trivalent iron is added to the reaction solution, the reaction solution contains a compound of trivalent iron at the time of the start of the reaction, the reaction solution contains a non-iron metal having a standard electrode potential of -2.5 to 0.1 inclusive or a metal compound containing the metal, or the reaction solution contains at least one metal selected from the group consisting of Ag, Bi and Pd or a metal compound containing the metal.
- -
-
Paragraph 0086
(2015/07/15)
-
- METHOD FOR PRODUCING ETHYLENE GLYCOL DIMETHACRYLATE
-
The present invention relates to a process for preparing ethylene glycol dimethacrylate, which comprises transesterification of ethylene glycol with an ester of methacrylic acid in the presence of catalysts, wherein a combination comprising lithium amide (LiNH2) and lithium chloride (LiCl) is used as catalyst. The process of the invention makes it possible to prepare ethylene glycol dimethacrylate particularly inexpensively and in a very high purity.
- -
-
Paragraph 0060; 0061; 0062; 0063; 0064; 0065; 0066; 0067
(2013/07/19)
-
- Fatty acid alkyl esters as feedstocks for the enzymatic synthesis of alkyl methacrylates and polystyrene-co-alkyl methacrylates for use as cold flow improvers in diesel fuels
-
The enzymatic transesterifications of fatty acid methyl esters (FAME) with hydroxyethyl methacrylate (HEMA) were carried out using the Candida antarctica lipase B immobilized within a porous polymethacrylate resin. The enzymatic activity in the transesterification reaction of FAME with HEMA depended on the polarity of the solvent and the highest yield was obtained in toluene (non-polar). The molar ratio of 1:4 (for methyl laurate: HEMA) and 1:2 (for methyl oleate:HEMA) was most favorable for the transesterification yield. The reaction condition (at 60 °C/24 h), and the enzyme concentration of 5% (w/w) for methyl laurate with HEMA, 2% (w/w) for methyl oleate with HEMA resulted in the highest final yield. Under these conditions, the maximum yields for the transesterification of methyl laurate with HEMA, methyl oleate with HEMA were 97 ± 5.4% and 91 ± 4.7%, respectively. After ten batches of transesterification of FAME with HEMA, enzyme activity was retained at the level of 88 ± 2.6% and 76 ± 2.3%, respectively, compared with their initial activity. Also, alkyl methacrylate/ styrene copolymers were synthesized by radical polymerization of HEMA-LMA (or HEMA-OMA) and styrene. The prepared copolymers have average molecular weights from 2.6 × 104 to 5.5 × 104. Especially, the poly(styrene-co-alkyl methacrylate)s (PStmHAMAn) led to a reduction in the pour point in ultra low sulfur diesel (ULSD) treated with 200-1,000 ppm of poly(styrene-co-alkyl methacrylate). Diesel fuel containing 1,000 ppm of the copolymer (PSt2HLMA8) showed a 15 ± 1.25 °C reduction in its pour point. AOCS 2011.
- Kim, Young-Wun,Eom, Gyeong Tae,Hong, Jin-Sook,Chung, Keun-Wo
-
experimental part
p. 1727 - 1736
(2012/04/10)
-
- METHOD FOR THE PRODUCTION OF (METH)ACRYLIC ESTERS
-
The present invention relates to a process for preparing (meth)acrylates, comprising the transesterification of a low-boiling ester of (meth)acrylic acid with a reactant alcohol in the presence of catalysts, which is characterized in that the transesterification is catalysed by a basic ion exchanger.
- -
-
Page/Page column 5-6
(2011/06/23)
-
- POLYMERIC DRUG DELIVERY SYSTEMS AND THERMOPLASTIC EXTRUSION PROCESSES FOR PRODUCING SUCH SYSTEMS
-
Implants are disclosed for delivery of therapeutic agents such as opioids and the manufacture and uses of such implants.
- -
-
-
- Process for preparation of high purity methacrylic acid
-
The present invention relates to a process for preparation of pure methacrylic acid, at least comprising the process steps: a) gas phase oxidation of a C4 compound to obtain a methacrylic acid- comprising gas phase, b) condensation of the methacrylic acid-comprising gas phase to obtain an aqueous methacrylic acid solution, c) separation of at least a part of the methacrylic acid from the aqueous methacrylic acid solution to obtain at least one crude methacrylic acid- comprising product; d) separation of at least a part of the methacrylic acid from the at least one crude methacrylic acid-comprising product by means of a thermal separation process to obtain a pure methacrylic acid.
- -
-
Page/Page column 16
(2009/08/16)
-
- Microgel Particle
-
The present invention relates to compositions comprising a pH-responsive microgel particle, wherein the particle is adapted to undergo a conformational change in response to a variation in pH. The compositions may be used as medicaments for treating a disease characterised by damaged or degenerated soft tissues (e.g. intervertebral discs).
- -
-
-
- COMPOSITION FOR POLYELECTROLYTES, POLYELECTROLYTES, ELECTRICAL DOUBLE LAYER CAPACITORS AND NONAQUEOUS ELECTROLYTE SECONDARY CELLS
-
A polymer electrolyte-forming composition containing (A) a quaternary ammonium salt of general formula (1) below and (B) an ionic liquid can be converted into a polymer without compromising the excellent properties of the ionic liquid, thus enabling an electrolyte having an excellent safety and electrical conductivity and also a broad potential window to be obtained. In formula (1), R1 to R3 are each independently an alkyl group of 1 to 5 carbons or a substituent having a reactive unsaturated bond and any two from among R1 to R3 may together form a ring, and R4 is methyl, ethyl or a substituent having a reactive unsaturated bond, with the proviso that at least one of R1 to R4 is a substituent having a reactive unsaturated bond. X is a monovalent anion, the letter m is an integer from 1 to 8, and the letter n is an integer from 1 to 4.
- -
-
-
- Production process for hydroxyalkyl (meth) acrylate
-
There is disclosed a novel production process for a hydroxyalkyl (meth)acrylate in which: the diffusion of harmful substances due to disposal of catalysts can be reduced; and also the amount of the catalyst as used can be greatly saved in the entire production process. This production process comprises the step of carrying out a reaction between (meth)acrylic acid and an alkylene oxide in the presence of a catalyst in order to produce the hydroxyalkyl (meth)acrylate; with the production process being characterized by further comprising the step of recovering the catalyst as has been used for the reaction.
- -
-
-
- Process for the preparation of hydroxyalkyl(meth)acrylate
-
The present invention provides: a high-quality hydroxyalkyl (meth)acrylate of which the alkylene glycol di(meth)acrylate content and the acid component content are both low; and its novel production process. The hydroxyalkyl (meth)acrylate, which has a content, in terms of an alkylene glycol di(meth)acrylate as an impurity, of not more than 0.1 weight % and an acid component content of not more than 0.1 weight %, is obtained by a process comprising the step of carrying out a batch reaction between (meth)acrylic acid and an alkylene oxide in the presence of a catalyst in order to produce the hydroxyalkyl (meth)acrylate; with the process making an adjustment as to charging of both raw materials in such a manner that, for, of a time as needed for supplying both raw materials, a supplying time of not less than 40 % of a total supplying time when the raw materials as supplied have a temperature of not lower than 40 °C, the molar ratio of the integrated amount of the alkylene oxide to the integrated amount of the (meth)acrylic acid that have been added to a reactor by then can be more than 1.0.
- -
-
-
- Hydrogel compositions useful for the sustained release of macromolecules and methods of making same
-
A method of producing a homogenous porous hydrogel useful for drug delivery is described. The pores of the hydrogel are created by diffusion enhancers to facilitate sustained delivery of macromolecules. Also described are various articles produced from these hydrogels.
- -
-
-
- Producing unsaturated esters by a lanthanide metal alkoxide catalyzed transesterification process
-
There is disclosed a process for producing an unsaturated ester of the formula (3): wherein R1, R2 and R3 independently represent hydrogen, halogen, alkyl, alkenyl and the like and R5 represents alkyl which may be substituted and the like, which process is characterized by subjecting an unsaturated ester of the formula (1): wherein R1, R2 and R3 have the same meaning as previously defined and R4 represents alkyl or phenyl and the like, to a transesterification reaction with a hydroxy compound of the formula (2):R5OH??(2)wherein R5 has the same meaning as previously defined, in the presence of a lanthanoide metal alkoxide.
- -
-
-
- N-oxyl compounds, process for the preparation thereof, and process for inhibiting the polymerization of vinyl monomers with the same
-
Disclosed are novel N-oxyl compounds of the following formula (1). wherein n is an integer of 1 to 18; R1and R2are each hydrogen or methyl, but at least one of them is hydrogen; R3, R4, R5and R6are each a straight-chain or branched alkyl group; and R7is hydrogen or (meth)acryloyl. When these compounds are added to vinyl monomers such as α,β-unsaturated carboxylic acids and esters thereof, they exhibit a satisfactory polymerization-inhibiting effect even at low contents and even at elevated temperatures.
- -
-
Page column 12
(2010/01/30)
-
- The synthesis of novel hybrid monomers
-
Novel hybrid amide-ester crosslinking monomers were prepared by using methodology which utilizes the differential functionalities present within a convenient amino alcohol. Modification of the procedure to a simple one-pot reaction enables the generation of these unique monomers to be scaled to commercial levels.
- Chan, Grace Y.N.,Looney, Mark G.,Solomon, David H.,Veluayitham, Sheela
-
-
- Curable resin composition
-
Cuarable resin compositions comprising (A) polyene components, and (B) unsaturated alicyclic compounds having thiol groups. The compositions are odorless and also excellent in heat resistance, adhesion properties and mechanical properties compared with conventional polyene-polythiols.
- -
-
-
- Fluorine-containing mono- or poly-alkylene glycol and method for producing same
-
The novel fluorine-containing mono- or poly-alkylene glycol of this invention is a mono- or poly-alkylene glycol of the formula (I): STR1 wherein R1, R2 and R3 independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, A represents a hydrogen atom, an unsaturated hydrocarbon group having 1 to 30 carbon atoms, a polar group or a polar group substituted with an unsaturated hydrocarbon group having 1 to 100 carbon atoms, B represents the same as the group selected from the group of A, provided that both A and B are not hydrogen atom, or a hydrocarbon group having 1 to 30 carbon atoms which may contain an oxygen atom or fluorine atom, x represents an integer of 0 to 100, and n represents an integer of 1 to 1000, the mono- or poly-oxyalkylene group in the main chain of the mono- or poly-alkylene glycol having at least one fluorine-substituted hydrocarbon group with 2 to 30 carbon atoms having at least 3 fluorine atoms bonded thereto graft-bonded onto the mono- or poly-oxyalkylene group in the main chain of the mono- or poly-alkylene glycol per one molecule of the mono- or poly-alkylene glycol.
- -
-
-
- Process for producing epsilon-caprolactone-modified hydroxyalkyl acrylate or methacrylate and coating copolymer from the same
-
ε-caprolactone-modified hydroxyalkyl acrylate or methyacrylate can be effectively produced from ε-caprolactone and a hydroxyalkyl acrylate or methacrylate in the presence of a stannous halide as a catalyst. The obtained monomer is used together with another copolymerizable monomer to produce a copolymer which is suitable for coating and photocurable composition.
- -
-
-
