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Nucleating agent for polypropylene as well as preparation method and application of nucleating agent

A polypropylene nucleating agent and acid binding agent technology, which is applied in the preparation of carboxylate, the preparation of carboxylic acid amide, chemical instruments and methods, etc., can solve the problems of poor compatibility, affecting the performance of products and finished products, and difficult to disperse uniformly. , to achieve the effect of improving compatibility, reducing polarity and easy dispersion

Active Publication Date: 2019-09-24
GUANGZHOU HUAXINKE ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the traditional aromatic amide nucleating agent is blended with polypropylene, there will be problems such as poor compatibility with polypropylene resin and difficult dispersion, which greatly affects the performance of products and finished products.

Method used

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  • Nucleating agent for polypropylene as well as preparation method and application of nucleating agent
  • Nucleating agent for polypropylene as well as preparation method and application of nucleating agent
  • Nucleating agent for polypropylene as well as preparation method and application of nucleating agent

Examples

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preparation example Construction

[0028] The preparation method of the above-mentioned polypropylene nucleating agent according to an embodiment of the present invention comprises the following steps: mixing 1,4-cyclohexanedicarboxylic acid, thionyl chloride and a catalyst, and reflux reaction to obtain bright yellow 1,4-cyclohexane Adipoyl chloride reaction solution, mixing the reaction solution with a primary amine compound, an acid-binding agent and an organic solvent, refluxing the reaction and filtering to collect a precipitate to obtain a polypropylene nucleating agent.

[0029] In a specific example, the primary amine compound is one or more of butylamine, hexylamine, heptylamine, octylamine, dodecylamine and octadecylamine, according to the R of the target product 1 and R 2 The corresponding diamide compound can be selected for the group. For example, the target product is 1,4-di-n-butyldicyclohexylamide, and the primary amine compound is butylamine.

[0030] In a specific example, the catalyst is one...

Embodiment 1

[0036] Mix 0.1M 1,4-cyclohexanedicarboxylic acid and 0.2M thionyl chloride in a reaction vessel, then add 0.5ml dimethylformamide, heat and reflux for 2 hours to obtain bright yellow 1,4-cyclohexanedicarboxylic acid Acid chloride reaction solution. Then 200ml of toluene was used as solvent, 0.3M pyridine and 0.2M butylamine were added, refluxed and filtered, after reacting for 6 hours, a white precipitate was obtained, which was dried to obtain a white powder 1,4-di-n-butyldicyclohexylamide.

Embodiment 2

[0038]Mix 0.1M 1,4-cyclohexanedicarboxylic acid and 0.2M thionyl chloride in a reaction vessel, then add 0.5ml dimethylacetamide, heat and reflux for 2 hours to obtain bright yellow 1,4-cyclohexanedicarboxylic acid Acid chloride reaction solution. Then 200ml of toluene was used as solvent, 0.3M piperidine and 0.2M heptylamine were added, and reflux was filtered. After reacting for 6 hours, a white precipitate was obtained, which was dried to obtain white powder 1,4-di-n-heptyldicyclohexylamide.

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Abstract

The invention relates to a nucleating agent for polypropylene as well as a preparation method and application of the polypropylene. The nucleating agent for the polypropylene has a structure represented by a general formula I shown in the description. According to the nucleating agent for the polypropylene provided by the invention, the structure of a benzene ring in an aromatic amide is changed into a structure of a cyclohexane group having weaker polarity and higher stability, a methylene structure of the cyclohexane group is similar to a structure of polypropylene, so that polarity of the material is reduced; and at the same time, R1 and R2 groups are changed from cyclohexyl, a benzene ring or a naphthalene ring into alkyl having 4 or more of carbon atoms, so that the compatibility of the nucleating agent with the polypropylene is significantly improved, the nucleating agent is better mixed with the polypropylene and better dispersed in the polypropylene, the melting point basically has no large change, formation of the beta crystal is facilitated, and stability of the polypropylene product is uniformly improved.

Description

technical field [0001] The invention relates to the field of nucleating agents, in particular to a polypropylene nucleating agent and its preparation method and application. Background technique [0002] Polypropylene is currently one of the most used engineering plastics, and the biggest disadvantage of polypropylene in processing applications is poor impact resistance at room temperature and low temperature. Studies on the crystallization behavior of polypropylene have shown that the β-crystal form of polypropylene can refine the grains, reduce the internal defects of polypropylene materials, and improve the impact resistance. Polypropylene is a semi-crystalline polymer, including five crystal structures of α, β, γ, δ and pseudohexagonal. Under normal processing conditions, isotactic polypropylene (iPP) mainly exists in the α crystal form, accompanied by A small amount of β crystal form. Among them, there are obvious boundaries between the α-crystal spherulites, which ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/20C07C231/02C07C233/58
CPCC08K5/20C07C231/02C07C51/60C08L2205/24C07C2601/14C08L23/12C07C233/58C07C61/09
Inventor 余波余吕宏王维钱玉英杨智韬
Owner GUANGZHOU HUAXINKE ENTERPRISE
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