- POLYETHYLENE COMPOSITIONS WITH IMPROVED OPTICAL PROPERTIES
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Embodiments of a polyethylene composition comprise at least 50% by wt. of at least one polyethylene polymer; and 0.001 to 2% by wt. of bisamide nucleating agent utilized to reduce haze within the polyethylene composition.
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Paragraph 0026-0027
(2018/02/28)
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- Preparation method of dicyclohexylterephthalamide
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The invention relates to the field of amide nucleating agents, and discloses a preparation method of N,N'-dicyclohexylterephthalamide. The method is characterized in that dimetyl terephthalate reacts with cyclohexylamine in the presence of anhydrous potassium carbonate and pyridine to generate N,N'-dicyclohexylterephthalamide represented by formula (I). The N,N'-dicyclohexylterephthalamide represented by formula (I), prepared through the method, has the advantages of easiness in separation, high yield, good purity, environment protection facilitation, and suitableness for large-scale industrial production.
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Paragraph 0032; 0033; 0034; 0035; 0036; 0037; 0038-0093
(2017/04/29)
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- A method for the production of nucleator-amide
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The invention discloses a production method for an amide nucleating agent. The production method includes organic acyl chloride, organic amine and a composite acid binding agent are subjected to a reaction in an aromatic solvent to obtain the nucleating agent, wherein the composite acid binding agent includes pyridine or a derivative thereof, triethylamine and a catalyst. According to the method provided by the invention, in the amide nucleating agent production, the composite acid binding agent with low toxicity, high activity and relatively low price is used, the synthesis time can be effectively shortened, the addition amount of the acid binding agent is decreased, and the yield of the product amide is increased. According to the method provided by the invention, the method not only can reduce the production cost of the amide beta nucleating agent, but also has important significance in reducing emission of pollutants and protecting the environment, and obtains remarkable economic benefits and social benefits.
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Paragraph 0031-0033
(2018/02/04)
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- A method for the production of nucleator-amide
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The invention discloses a production method for an amide nucleating agent; the production method includes organic acyl chloride and organic amine are subjected to a reflux reaction in a reaction medium to obtain the nucleating agent, wherein the reaction medium is selected from pyridine and derivatives thereof, the molar ratio of an acyl chloride group of the organic acyl chloride to an amine group of the organic amine is 1:1.0-1.5, and the amount of the reaction medium accounts for 30-60 wt% of the total amount of the organic acyl chloride, the organic amine and the reaction medium. According to the production method, the reaction medium selected from pyridine and the derivatives thereof is used, the yield of the product is improved, the reaction time is shortened, the amount of the reaction medium is reduced, and the production cost of the amide beta nucleating agent can be substantially reduced. At the same time, because other solvents are not introduced in the reaction process, recovery and repeated use of the reaction medium are facilitated, the intensity of the operating quantity in the production process is reduced, the treatment difficulty of waste liquid discharge is reduced, and environmental protection and generation of significant social benefits and economic benefits are facilitated.
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Paragraph 0019-0021; 0025-0033; 0037-0039
(2018/02/04)
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