- A high-quality γ - methyl methacryloxy propyl trimethoxy silane preparation method (by machine translation)
-
The invention relates to a high-quality γ - methyl methacryloxy propyl trimethoxy silane preparation method, which belongs to the technical field of organic chemistry, this invention has improved the allyl methacrylate silanes with three a oxygen radical hydrogen addition of hydrogen synthesis method, such as compression, excessive use of three a oxygen radical hydrogen silane and anti-feeding mode, γ - methyl through propyl trimethoxy silane preparation method a series of improved, to obtain a high-quality synthetic route, through the above-mentioned improved, compared with the original process, γ - methyl methacryloxy propyl trimethoxy silane is obviously improved yield, basic are kept in a 93% or more, and the rectification of the residual high [...] reduce. (by machine translation)
- -
-
Paragraph 0031; 0039; 0040
(2018/09/08)
-
- Method for preparing organic silicon by passage reaction device
-
The invention provides a method for preparing organic silicon by a passage reaction device. Under the condition of main catalysts Z, hydrogen-containing silane X and an unsaturated compound Y are introduced into the passage reaction device; hydrosilylation reaction is performed to prepare the organic silicon, wherein the hydrogen-containing silane X has the structure being HSiRR'Cl, in the formula, R and R' are independently C1 to C16 alkyl or alkoxy; a=1, 2 or 3; b, c and d are respectively and independently 0, 1, 2 or 3; the unsaturated compound Y is a monoene compound or single-alkyne compound; the main catalysts Z are one or several mixed ones of single-component complexes or multi-component complexes of Pt, Pd, Rh, Ru, Cu, Ag, Au or Ir; the passage surface in which reaction flow contacts is subjected to inactivation treatment by an activating agent Z. The problems of long reaction period, poor stability and the like of large-sized reaction equipment are solved; the problem that mixing, pre-reaction and afterreaction are separated and are performed in multi-unit equipment is solved.
- -
-
Paragraph 0050
(2016/10/17)
-
- Process for manufacturing polysiloxane microcapsules that are functionalized and are not very porous
-
A method is provided for encapsulating products that can have lipophilic or hydrophilic, including volatile, properties in a polysiloxane membrane that is particularly impervious. A method is also provided for evaluating the imperviousness of capsules. The present method includes the following steps: a) formation of droplets by an emulsion between an oily phase containing the product to be encapsulated and an acidic aqueous phase heated to around 50° C. and in the presence of surfactants; b) addition and hydrolysis of at least one silane in order to obtain a silanol; c) increasing the pH in order to start condensation of the silanol to form a first membrane around the droplets of the product to be encapsulated; d) lowering the pH; e) increasing the pH, optionally preceded by adding a silane, in order to obtain a new condensation of silanol around the droplets of the product to be encapsulated.
- -
-
Page/Page column 4
(2016/09/26)
-
- COSMETIC TREATMENT METHOD COMPRISING THE APPLICATION OF A COATING BASED ON AN AEROGEL COMPOSITION OF LOW BULK DENSITY
-
The present invention relates to a cosmetic treatment method comprising the formation of a coating on keratin fibres characterized in that it comprises: 1) the preparation of an aerogel precursor composition comprising:—at least one organic solvent chosen from acetone, C1-C4 alcohols, C1-C6 alkanes, C1-C4 ethers, which may or may not be perfluorinated, and mixtures thereof and at least one precursor compound that contains:—at least one atom chosen from silicon, titanium, aluminium and zirconium,—at least one hydroxyl or alkoxy function directly attached to the atom chosen from silicon, titanium, aluminium and zirconium by an oxygen atom, and,—optionally an organic group directly attached to the atom chosen from silicon, titanium, aluminium and zirconium by a carbon atom, 2) the removal of the solvent or solvents resulting in the formation of an aerogel composition having a bulk density less than or equal to 0.35 g/cm3, 3) the application to the keratin fibres of the aerogel composition resulting from step 2) or of the aerogel precursor composition resulting from step 1). Advantageously, the molar ratio between the precursor compounds and the solvent is at most 1/20.
- -
-
Paragraph 0070
(2014/02/15)
-
- METHOD OF PRODUCING A HYDROLYZABLE SILICON-CONTAINING COMPOUND
-
The present invention provides a safe, inexpensive, and high yield means of producing a hydrolyzable silicon-containing compound, e.g., an organooxysilane and the like. A compound (A) represented by the general formula R1-O-R2 wherein R1 represents a C4-30, substituted or unsubstituted, tertiary alkyl group or aralkyl group and R2 represents a C1-30, substituted or unsubstituted, monovalent hydrocarbyl group or acyl group, is reacted in the presence of a Lewis acid catalyst with a halosilane (B) represented by the general formula R3mSiX4-m wherein R3 represents the hydrogen atom or a C1-30 substituted or unsubstituted monovalent hydrocarbyl group, X is independently bromine or chlorine, and m represents an integer from 0 to 3.
- -
-
Page/Page column 22; 24
(2012/07/14)
-
- Practical conversion of chlorosilanes into alkoxysilanes without generating HCl
-
Alcohol-free: A versatile, efficient, and practical synthesis of alkoxysilanes without generation of HCl involves the reaction of chlorosilanes with unsymmetrical ethers in the presence of a Lewis acid (see scheme). The reaction proceeds through selective cleavage of C-O bonds and is superior to conventional processes. Industrially feasible reagents are used and only one by-product results. Copyright
- Wakabayashi, Ryutaro,Sugiura, Yasushi,Shibue, Toshimichi,Kuroda, Kazuyuki
-
supporting information; experimental part
p. 10708 - 10711
(2011/12/05)
-
- SYSTEM, REACTOR AND PROCESS FOR CONTINUOUS INDUSTRIAL PREPARATION OF 3-METHACRYLOYLOXYPROPYLALKOXYSILANES
-
The present invention relates to a system, to a reactor and to a process for continuous industrial performance of a reaction wherein allyl methacrylate A is reacted with an HSi compound B in the presence of a catalyst C and optionally of further assistants, and the system is based at least on the combination of reactants (3) for components A (1) and B (2), at least one multielement reactor (5) which, in turn, comprises at least two reactor units in the form of exchangeable pre-reactors (5.1) and at least one further reactor unit (5.3) connected downstream of the pre-reactors, and on a product workup (8).
- -
-
Page/Page column 6-7
(2010/08/03)
-
- Some regularities of chlorosilanes etherification
-
The influence of reagents, solvent polarity, and temperature on the etherification of chlorosilanes ClCH2SiCl3, VinSiCl 3, PrSiCl3, and Ph3SiCl with ethanol was studied. Influence of reaction temperature on the ratio of the synthesized alkoxysilane and related side-product siloxane is revealed. Use of excess alcohol is shown to increase the content of siloxane. Introduction of FeCl 3 does not affect the synthesis. Solvents are shown to influence the reaction rate: the rate constant increases with increasing ε parameter of the solvent. The rate constant of etherification of chlorosilanes with ethanol falls in the series: ClCH2SiCl3 > VinSiCl3 > PrSiCl3. An explanation of the regularities is suggested.
- Belyakova,Komarov,Bykovchenko,Ershov,Chernyshev,Storozhenko
-
body text
p. 1650 - 1655
(2011/05/13)
-
- PROCESS FOR PRODUCING ORGANOALKOXYSILANES FROM ORGANIC ACIDS OR CYANATES AND HALOALKYLALKOXYSILANES
-
A process for the preparation of organoalkoxysilanes containing one or more organic functional groups derived from organic acids or hydrogen cyanates, by a continuous or batch process utilizing a solid guanidinium salt as a phase transfer catalyst for the reaction between a liquid phase haloalkylalkoxysilane and a solid phase alkali or alkaline earth metal salt or ammonium salt of an organic acid or a metal cyanate.
- -
-
Page/Page column 4
(2010/11/25)
-
- A METHOD OF MANUFACTURING AN ORGANIC SILICON COMPOUND THAT CONTAINS A METHACRYLOXY GROUP OR AN ACRYLOXY GROUP
-
A method of manufacturing an organic silicon compound that contains a methacryloxy group or an acryloxy group, the method being characterized by the fact that manufacturing or conducting purification by distillation is carried out in the presence of a phenothiazine derivative having a molecular weight equal to or higher than 240. And a stable composition comprising an organic silicon compound that contains a methacryloxy group or an acryloxy group and a phenothiazine derivative having a molecular weight equal to or higher than 240 and used in an amount sufficient to stabilize the aforementioned organic silicon compound.
- -
-
Page/Page column 11
(2008/06/13)
-
- Process for stabilizing unsaturated organosilicon compounds
-
A process for stabilizing organosilicon compounds bearing unsaturated groups during their preparation, distillation, and/or storage, the organosilicon compounds bearing unsaturated groups having been obtained by reacting a haloalkylsilane with a salt of an unsaturated organic acid, by adding one or more compounds of the formula I wherein R1 and R2 are identical or different linear or branched C1-20 alkyl, and the radicals R3 are identical or different and are hydrogen or linear or branched alkyl radicals having 1-20 carbon atoms.
- -
-
-
- Method for stabilizing unsaturated organo-silicon compounds
-
Process for stabilizing organosilicon compounds (II) containing an unsaturated group of the vinyl, acrylic ester or vinyl ether type, during production, distillation and/or storage, comprises preparing (II) by reacting a haloalkylsilane with a salt of an unsaturated organic acid in the presence of alkylene-bis(dialkylphenol) compounds (I). Process for stabilizing organosilicon compounds of formula (II) containing an unsaturated group of the vinyl, acrylic ester or vinyl ether type, during production, distillation and/or storage, comprises preparing (II) by reacting a haloalkylsilane with a salt of an unsaturated organic acid in the presence of alkylene-bis(dialkylphenol) compounds of formula (I); [Image] H2C=C(R4>)[C(O)O]w(O)x-(R5>)y-Si(R6>)z(OR7>)3-z (II); R4>H or linear or branched 1-10 C hydrocarbyl; R5>linear, cyclic or branched 1-40 C hydrocarbyl, optionally containing heteroatom(s) selected from N, O, S or P; R6>, R7>linear, cyclic or branched 1-10 C hydrocarbyl; w, x : 0 or, in one case only, 1; y : 0 or 1; z : 0, 1 or 2; R1>, R2>linear or branched 1-20 C alkyl; R3>H or linear or branched 1-20 C alkyl.
- -
-
-
- The Hydrolysis/Condensation Behaviour of Methacryloyloxyalkylfunctional Alkoxysilanes: Structure-Reactivity Relations
-
Various methacryloyloxymethylalkoxysilanes have been synthesized by nucleophilic substitution reactions starting from chloromethylalkoxysilanes under phase transfer catalysis conditions. The compounds thus obtained show an exceptionally high degree of reactivity with regard to hydrolysis and condensation both under acidic as well as under basic conditions compared to the established 3-methacryloyloxypropyltrimethoxysilane. A mechanistic model for this high reactivity by intramolecular activation is discussed.
- Altmann, Stefan,Pfeiffer, Juergen
-
p. 1081 - 1092
(2007/10/03)
-
- Enhancement of the efficiency of the low temperature method for kinetic resolution of primary alcohols by optimizing the organic bridges in porous ceramic-immobilized lipase
-
For the enhancement of enantioselectivity and acceleration of the reaction rate in the lipase-catalyzed resolution of primary alcohols, the use of a very low reaction temperature (-30 °C) and an immobilized lipase on organic bridges-coated porous ceramic support was found to be highly effective. Furthermore, the structure of the organic bridges greatly influenced the temperature effect between in E and 1/T as well as the reaction rate. Among the organic bridges examined in the resolution of (±)-2-hydroxymethyl-1,4-benzodioxane, the 6-(2-methylpropanoyloxy)hexylsilanetrioxyl bridge was the best choice for both the E value and the reaction rate at -30 °C.
- Sakai, Takashi,Hayashi, Kyoko,Yano, Fumika,Takami, Mie,Ino, Megumi,Korenaga, Toshinobu,Ema, Tadashi
-
p. 1441 - 1446
(2007/10/03)
-
- Distillation of (meth) acryloxy-bearing alkoxysilane
-
A (meth)acryloxy-bearing alkoxysilane is isolated and purified to a high purity by distilling a reaction solution containing the (meth)acryloxy-bearing alkoxysilane in a thin-layer distillation device at a temperature of 90-160° C. and a vacuum of 1-15 mmHg. The resulting alkoxysilane product does not give rise to the quality problem that the product will gradually whiten during storage owing to contact with air. The occurrence of self-polymerization of the alkoxysilane is restrained.
- -
-
Page column 5-9
(2008/06/13)
-
- METHOD OF PREPARING AN ORGANOSILICON COMPOUND CONTAINING A METHACRYLOXY FUNCTIONAL GROUP
-
A method of preparing an organosilicon compound containing an acryloxy-functional group or a methacryloxy-functional group represented by general formula CH2═CR1—COO —R2—Si(OR3)nR43?n, where R1, R2, R3, R4 are as described below, comprising reacting (a) an alkali-metal salt of acrylic acid or an alkali-metal salt of methacrylic acid described by general formula CH2═CR1COOM1, where R1 is a methyl group or a hydrogen atom and M1 is an alkali metal and (b) an organosilicon containing a halogen-substituted organic group described by general formula XR2Si(OR3)nR43?n, where X is a halogen atom, R2 is an alkylenoxyalkylene group or an alkylene group comprising 1 to 6 carbon atoms, R3 is an alkyl group comprising 1 to 6 carbon atoms or an alkoxyalkyl group comprising 2 to 4 carbon atoms, R4 is a monovalent hydrocarbon group, and n is an integer of 1 to 3; in the presence of (c) a tertiary amine having a cyclic structure selected from the group consisting of 1,8-diazabicyclo [5.4.0]undec-7-ene, 1,4-diazabicyclo[2.2.2]octane, and 1,5-diazabicyclo[4.3.0]-non-5-ene.
- -
-
-
- Dental adhesive coating base composition and oral composition
-
A dental adhesive coating base composition comprising a copolymer represented by formula (I) or (II) in an amount of from 5 to 40 wt % based on the total amounts of the composition; and an oral composition comprising at least one of a copolymer represented by formula (I) and a copolymer represented by formula (II) in an amount of from 5 to 40 wt % based on the total amount of the composition, at least one of a phosphoric acid and tartaric acid present in an amount effective to increase the solubility of fluoride in the composition, up to an amount of 6 wt % or less based on the total amount of the composition; a fluorine-containing compound in an amount effective for dental caries prevention; and a volatile nonaqueous solvent are disclosed: STR1 wherein R11 represents an alkyl group having from 1 to 10 carbon atoms; R12 represents a lower alkyl group having from 1 to 2 carbon atoms, provided that three R12 groups must be the same; R13, R14, R15, R16 and R17, which may be the same or different, each represents a hydrogen atom or a methyl group; W1 is from 5 to 30 wt %; X1 is from 20 to 60 wt %; Y1 is from 20 to 60 wt %; and Z1 is from 0.2 to 20 wt %; STR2 wherein R21 and R22, which may be the same or different, each represent an alkyl group having from 1 to 10 carbon atoms; R23, R24, and R25, which may be the same or different, each represent a hydrogen atom or a methyl group, provided that at least one of the groups R21 and R22, and R24 and R25, respectively, are different from each other; X2 is from 5 to 80 wt %; Y2 is from 10 to 95 wt %; and Z2 is from 0 to 85 wt %.
- -
-
-
