29598-76-3Relevant articles and documents
Method for synthesizing pentaerythritol tetra (3-lauryl thiopropionate) by one-pot method
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Paragraph 0023; 0025-0040, (2021/08/21)
The invention provides a method for synthesizing pentaerythritol tetra (3-lauryl thiopropionate) by a one-pot process. The method comprises the following steps: adding a reaction solvent into a reaction container, then sequentially adding pentaerythritol, acrylic acid, triethylamine and catalytic equivalent strong base, heating to 55 DEG C, slowly dropwise adding dodecanethiol, keeping the temperature for 2 hours, slowly dropwise adding a reaction solution in which triphosgene is dissolved, and carrying out heat preservation and stirring for 2 hours after dropwise adding is completed; and after the reaction is finished, washing with water, removing the solvent, and crystallizing and separating to obtain the product. According to the invention, the method has the characteristics of low raw material cost, mild reaction conditions, high reaction speed, simplicity in operation, less pollution and environmental friendliness; and compared with the high-temperature reaction conditions required for synthesizing pentaerythritol tetra (3-lauryl thiopropionate) by a transesterification method or esterification method, the energy consumption is effectively reduced, the production time is shortened, the production efficiency is improved, and the method is suitable for industrial production.
A four-(3 - dodecyl sulfur generation of propionic acid) pentaerythritol method for preparing an antioxidant (by machine translation)
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Paragraph 0042-0047, (2018/09/08)
The invention discloses a four-(3 - dodecyl sulfur generation of propionic acid) pentaerythritol method for preparing an antioxidant. This kind of preparation method comprises the following steps: 1) will be an azo compound is can be mixed, heated to 60 °C -85 °C, adding 3 - mercapto propionic acid, stirring reaction; 2) heating up to 100 °C -120 °C, adding pentaerythritol and acidic catalyst mixed solution, mixed reaction; 3) the solid product through the purification reaction, drying, to obtain four (3 - dodecyl sulfur generation of propionic acid) pentaerythritol. This preparation method using the medium acidic catalyst, the advantages that the high reaction activity, good dispersibility, the price is cheap. The reaction technology is moderate, not easily cause equipment corrosion, simple operation, high selectivity catalyst product, product is light in color. At the same time the esterification reaction using a mixed solvent, to pentaerythritol has excellent dissolution effect, to ensure that the reaction has been in a homogeneous system, the reaction efficiency is improved and the product yield. (by machine translation)
Stabilizer for synthetic resins
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, (2008/06/13)
Synthetic resins, particularly polyolefins, are markedly improved in their resistances to heat and oxidation by the incorporation of a 2-methyl-4-t-butyl-5-hydroxyphenylalkanoic acid ester alone or in combination with a thioether-type antioxidant represented by the general formula STR1 wherein R represents an alkyl group of 12 to 20 carbon atoms, or by the general formula STR2 wherein R represents an alkyl group of 4 to 20 carbon atoms.
