- Preparation method of diallyl bisphenol S ether
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The invention discloses a preparation method of diallyl bisphenol S ether. The preparation method comprises the following steps: adding solid alkali, bisphenol S and chloropropene into an anhydrous aprotic strong polar solvent, and reacting at 55-100 DEG C for 7-12 hours in the presence of a catalyst; carrying out solid-liquid separation, and separating diallyl bisphenol S ether and inorganic saltfrom the obtained filter cake; directly and circularly applying the filtrate containing the solvent and the catalyst to the next preparation of the diallyl bisphenol S ether, wherein the catalyst isa nonionic surfactant, and the dosage of the catalyst is at least 5% of the weight of bisphenol S. The method belongs to an anhydrous reaction, the one-time conversion rate of the raw materials is increased, and the used solvent and catalyst can be directly reused without being recycled and purified so that the problem of industrial wastewater is fundamentally solved, and high quality and high yield of target products and byproducts are realized.
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Paragraph 0033-0044
(2020/12/30)
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- Preparation method of tetrabromobisphenol S bis(2,3-dibromopropyl ether) flame retardant
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The invention provides a preparation method of a tetrabromobisphenol S bis(2,3-dibromopropyl ether) flame retardant. Bisphenol S used as a raw material and chloropropene undergo a substitution reaction to obtain a bisphenol S diallyl ether intermediate, and the bisphenol S diallyl ether and liquid bromine undergo addition and substitution reactions to obtain tetrabromobisphenol S bis(2,3-dibromopropyl ether). One-time bromination is adopted to introduce all eight bromine atoms into an aromatic ring and a side chain at the same time, so that the process route is shortened, the operation is simple, the safety is high, and the production cost is low. A solvent can be recycled in the process of preparing the bisphenol S diallyl ether intermediate, and the output of three wastes is greatly reduced, so the pollution to the environment is reduced, and the production cost is saved. The tetrabromobisphenol S bis(2,3-dibromopropyl ether) flame retardant prepared in the invention has high productpurity and improved application quality.
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Paragraph 0028; 0035-0050; 0066-0068
(2020/04/29)
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- Process for synthesizing diallyl phenol ether compound through azeotropic dehydration
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The invention discloses a process for synthesizing a diallyl phenol ether compound by azeotropic dehydration, which comprises the following steps: (1) dissolving a bisphenol compound in an organic solvent, and adding an inorganic base or an aqueous solution of the inorganic base to react to generate phenolate; and (2) vacuumizing the mixture obtained by the reaction in the step (1) or adding a water-carrying agent for dehydration, adding an allyl compound after dehydration is finished, and reacting to obtain the diallyl phenol ether compound. The invention provides a method for preparing a bisphenol compound into an intermediate product phenate and then reacting the intermediate product phenate with a propenyl compound to generate a diallyl phenol ether compound product, which comprises the following steps: adding a water-carrying agent or vacuumizing to remove water in a reaction system; according to the method, the problem of raw material waste caused by hydrolysis of propylene compounds can be effectively avoided, the reaction yield and purity are improved, aftertreatment is simple, and economic benefits are improved.
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Paragraph 0023-0024
(2021/01/04)
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- Bisphenol-based epoxy compound using thiol-ene reaction and method for preparing the same, and composite of organic-inorganic materials comprising a cured product thereof and method for preparing the composite
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The present invention relates to a bisphenol-based epoxy compound having an alkoxysilylalkyl-S-alkyl group and a method for preparing the same, a composite of organic-inorganic materials comprising the cured product and a method for preparing the composite. The novel bisphenol-based epoxy compound can provide a composite which shows improved thermal resistance and thermal expansion properties and has excellent hardness when being used for manufacturing high-integration and high-performance electronic components such as a next-generation semiconductor substrate and PCB.COPYRIGHT KIPO 2017
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Paragraph 0171-0174
(2017/08/24)
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- PROCESS FOR THE PRODUCTION OF DIPHENYL SULFONE COMPOUNDS
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A method for controlled production of mono and diether derivatives of 4,4'-dihydroxydiphenyl sulfone (SDP) namely 4-substituted-4'-hydroxydiphenyl sulfones and 4,4'-disubstituted diphenyl sulfones in high yields by reacting alkyl halide and the like, with 4,4'- dihydroxydiphenyl sulfone. 4-substituted-4'-hydroxydiphenyl sulfone is prepared by reacting equimolar ratio of 4,4'-dihydroxydiphenyl sulfone, alkyl halide and aqueous alkali solution with >80% yield. 4,4'-disubstituted diphenyl sulfone is prepared by reacting one mole of 4,4'- dihydroxydiphenyl sulfone, two moles of alkyl halide and like and two moles of aqueous alkali solution with >80% yield. The method of invention is useful in production of diphenyl sulfone compounds such as 4-allyloxy-4'-hydroxydiphenyl sulfone, 4,4'-diallyloxydiphenyl sulfone, 4-isopropxy-4'-hydroxydiphenyl sulfone, 4,4'-diisopropoxydiphenyl sulfone, 4- benzyloxy-4'-hydroxydiphenyl sulfone, 4,4'-dibenzyloxydiphenyl sulfone etc. This is a commercially feasible green manufacturing process.
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Page/Page column 6-7
(2014/11/11)
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- Investigations of thiol-modified phenol derivatives for the use in thiol-ene photopolymerizations
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Thiol-ene photopolymerizations gain a growing interest in academic research. Coatings and dental restoratives are interesting applications for thiol-ene photopolymerizations due to their unique features. In most studies the relative flexible and hydrophilic ester derivative, namely pentaerythritoltetra(3-mercaptopropionate) (PETMP), is investigated as the thiol component. Thus, in the present study we are encouraged to investigate the performance of more hydrophobic ester-free thiol-modified bis-and trisphenol derivatives in thiol-ene photopolymerizations. For this, six different thiol-modified bis-and trisphenol derivatives exhibiting four to six thiol groups are synthesized via the radical addition of thioacetic acid to suitable allyl-modified precursors and subsequent hydrolysis. Compared to PETMP better flexural strength and modulus of elasticity are achievable in thiol-ene photopolymerizations employing 1,3,5-triallyl-1,3,5-triazine-2,4,6-trione (TATATO) as the ene derivative. Especially, after storage in water, the flexural strength and modulus of elasticity is twice as high compared to the PETMP reference system.
- Reinelt, Sebastian,Tabatabai, Monir,Fischer, Urs Karl,Moszner, Norbert,Utterodt, Andreas,Ritter, Helmut
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supporting information
p. 1733 - 1740
(2014/08/18)
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- Novel diepoxide derivatives of diallyl phenolics
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The present invention relates to the preparation of ethers and esters of diallylphenols and the epoxidation of the diallyl moiety to provide bis-epoxide ether and ester intermediates useful in the preparation of epoxy resins.
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Page/Page column 4
(2010/02/11)
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- Hydrogen Bonding. Part 18. Gas-Liquid Chromatographic Measurements for the Design and Selection of some Hydrogen Bond Acidic Phases Suitable for Use as Coatings on Piezoelectric Sorption Detectors
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A number of involatile liquids based on 4,4'-isopropylidenediphenol (bisphenol-A) or other bisphenols have been prepared as candidate coatings for piezoelectric sorption detectors.The liquids have been used as GLC stationary phases, and gas-liquid partition coefficients of a series of solutes have been obtained for these phases.Application of the linear solvation energy equation below has revealed that two particular liquids (8 and 9) possess very large hydrogen bond acidities coupled to rather small hydrogen bond basicities, and hence might be suitable as coatings with selectivity towards solutes that are hydrogen bond bases.One other compound (10) is not suitable as a coating because it is a solid at room temperature, but it has very considerable hydrogen bond acidity, and may be suitable as a novel GLC stationary phase.In the linear solution energy equation above, K is the gas-liquid partition coefficient for a series of solutes on a given phase, and the explanatory variables R2, ?H2, αH2, βH2 and log L16 are solute parameters that we have described before.A term by term analysis of the equation can be used to evaluate quantitatively how specific solute-solvent interactions influence the magnitude of the various log K values.
- Abraham, Michael H.,Hamerton, Ian,Rose, John B.,Grate, Jay W.
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p. 1417 - 1423
(2007/10/02)
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- Phenolic compound, preparation thereof and recording material employing same
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A phenolic compound represented by the formula: STR1 a process for producing it and a recording material comprising a support bearing a heat- or pressure-sensitive color-forming layer containing the phenolic compound and a leuco dye.
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