- Novel bioactive imidazole-containing polymeric surfactants as petroleum-collecting and dispersing agents: Synthesis and surface-active properties
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Novel series of imidazole-containing polymers and polymeric surfactants have been synthesized via an efficient procedure. It included copolymerization of 1-vinyl-imidazole (VIM) with lauryl methacrylate (LMA) initiated by benzoyl peroxide and the 1H NMR spectroscopic data was utilized to estimate the monomer reactivity ratio. Conversion of polymers to surfactants was achieved through quaternization of the imidazole nitrogen with dimethyl sulphate. Spectroscopic techniques were used to elucidate the chemical structures of all synthesized compounds. The surface-active properties of polymeric surfactants beside their activities against various microbes were investigated. In addition, petroleum-collecting and dispersing properties of surfactants in diluted and undiluted form in varying waters were evaluated.
- Tantawy, Ahmed H.,Mohamed, Hany I.,Khalil, Ahmed A.,Hebash, Kaouser A.,Basyouni, Mahmoud Z.
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- Multicatalytic Transformation of (Meth)acrylic Acids: a One-Pot Approach to Biobased Poly(meth)acrylates
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Shifting from petrochemical feedstocks to renewable resources can address some of the environmental issues associated with petrochemical extraction and make plastics production sustainable. Therefore, there is a growing interest in selective methods for transforming abundant renewable feedstocks into monomers suitable for polymer production. Reported herein are one-pot catalytic systems, that are active, productive, and selective under mild conditions for the synthesis of copolymers from renewable materials. Each system allows for anhydride formation, alcohol acylation and/or acid esterification, as well as polymerization of the formed (meth)acrylates, providing direct access to a new library of unique poly(meth)acrylates.
- Fouilloux, Hugo,Placet, Vincent,Qiang, Wei,Robert, Carine,Thomas, Christophe M.
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p. 19374 - 19382
(2021/07/21)
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- Broadly Applicable Ytterbium-Catalyzed Esterification, Hydrolysis, and Amidation of Imides
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An efficient, broadly applicable, operationally simple, and divergent process for the transformation of imides into a range of carboxylic acid derivatives under mild conditions is reported. By simply using catalytic amounts of ytterbium(III) triflate as a Lewis acid promoter in the presence of alcohols, water, amines, or N,O-dimethylhydroxylamine, a broad range of imides is smoothly and readily converted to the corresponding esters, carboxylic acids, amides, and Weinreb amides in good yields. This method notably enables an easy cleavage of oxazolidinone-based auxiliaries.
- Guissart, Céline,Barros, Andre,Rosa Barata, Luis,Evano, Gwilherm
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supporting information
p. 5098 - 5102
(2018/09/13)
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- Preparation method of lauryl methacrylate
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The invention discloses a preparation method of lauryl methacrylate. A lauryl methacrylate product with the purity larger than 99.0% is obtained through reacting the raw materials of methyl methacrylate and lauryl alcohol under the condition of existence of a compound catalyst of a catalyst, namely, salt of acetylacetonate, and organic tin, and a nitroxide free radical polymerization inhibitor through adopting a reaction distillation ester exchange technology, wherein the addition of the catalyst takes up 0.5%-5.0% of the total mass of the raw materials; the addition of the polymerization inhibitor takes up 0.05%-0.5% of the total mass of the raw materials; the molar rate of methyl methacrylate to lauryl alcohol is (2.0-6.0): 1. The used catalyst not only has the advantages of being less in use amount, high in catalytic efficiency and short in reaction time, but also has the advantages of being mild in reaction condition, easy and convenient in post-treatment, free of corrosivity, capable of being recycled, and the like; the invention provides the better preparation method of lauryl methacrylate.
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Paragraph 0029-0031
(2017/01/17)
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- Process for producing methacrylic ester
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A method of producing a methacrylic acid ester which comprises carrying out an ester-exchange reaction between methyl methacrylate and an alcohol or a phenol while removing by-product methanol as an azeotropic mixture with methyl methacrylate from the reaction system under reflux conditions, by the use of a reaction apparatus equipped with a distillation column. A methacrylic acid ester is produced with a good productivity by controlling the reflux ratio.
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Page/Page column 5-6
(2008/06/13)
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- Disinfectant polymeric coatings for hard surfaces
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Liquid disinfectant compositions are disclosed which can be used to surface-coat substrates with polymeric films which are adherent, water-resistant and which can impart prolonged germicidal properties to the treated surfaces.
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- Cosmetic emulsions containing acrylamide copolymer
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Water-in-oil emulsions wherein the emulsifier is a copolymer of 1 mol of acrylamide with 2 to 20 mols of at least one ethylenically unsaturated ester copolymerizable therewith selected from the group consisting of vinyl alkylcarboxylates, alkyl and cycloalkyl acrylates, and alkly and cycloalkyl methacrylates, wherein the alkyl and cycloalkyl groups contain 6 to 24 carbon atoms, and the continuous phase is a cosmetically acceptable oil, which can be prepared easily, safely and inexpensively. The emulsions are substantially odorless and are cosmetically acceptable for the care of the skin.
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