Imide polypropylene beta crystalline form nucleating agent and preparation method thereof

A polypropylene, beta crystal technology, applied in the direction of organic chemistry, etc., can solve problems such as unfavorable production and application, complex synthesis process, etc., and achieve the effects of improving impact strength, simple synthesis steps, and easy dispersion.

Active Publication Date: 2015-11-18
广东炜林纳新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relatively speaking, the process of melt blending method is relatively simple, and it is widely used at present. The synthesis process of in-kettle method is relatively complicated, which is not conducive to actual production and application.

Method used

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  • Imide polypropylene beta crystalline form nucleating agent and preparation method thereof
  • Imide polypropylene beta crystalline form nucleating agent and preparation method thereof
  • Imide polypropylene beta crystalline form nucleating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] After melting 0.06 mol of commercially available phthalic anhydride, add 2 mL of ethylenediamine, then add 0.05 mol of α-amino β-imidazolylpropionic acid, stir for 4 hours and recrystallize, then add 120 mL of ethyl acetate, Place the flask in an ice-water bath at -10-10°C, add 0.15mL of triethylamine, and slowly add 20.0g of isobutyl chloroformate, after reacting for 2 hours, add 0.15mol of glycine that has been cooled to -10-10°C in advance and 20mL aqueous sodium hydroxide solution, stirred for a period of time under ice-water bath conditions, then removed the ice-water bath, reacted at room temperature for 2 hours, the reaction solution was allowed to stand and separated, the water layer was acidified with concentrated hydrochloric acid, and the precipitated solid was recrystallized with ethanol-water solution to obtain The imide polypropylene beta crystal nucleating agent of the following structural formula:

[0032]

Embodiment 2

[0034] After melting 0.06mol of commercially available phthalic anhydride, add 2mL of ethylenediamine, then add 0.05mol of aminoacetic acid, stir and react for 8 hours, then recrystallize, then add 120mL of ethyl acetate, and place the flask at -10~ In an ice-water bath at 10°C, add 0.15mL triethylamine, and slowly add 20.0g isobutyl chloroformate. After 10 hours of reaction, add 0.15mol glycine that has been cooled to -10-10°C and 180mL aqueous sodium hydroxide solution. After stirring in an ice-water bath for a period of time, remove the ice-water bath and react at room temperature for 24 hours. The reaction solution is allowed to stand and separate into layers, the water layer is acidified with acetic acid, and the precipitated solid is directly filtered with water to obtain the imide polypropylene β crystal form with the following structural formula Nucleating agent:

[0035]

Embodiment 3

[0037] After melting 0.06 mol of commercially available phthalic anhydride, add 2 mL of ethylenediamine, then add 0.05 mol of phenylalanine, stir and react for 6 hours, then recrystallize, then add 120 mL of ethyl acetate, and place the flask in - In an ice-water bath at 10-10°C, add 0.15mL triethylamine, and slowly add 20.0g isobutyl chloroformate. After 5 hours of reaction, add 0.15mol glycine that has been cooled to -10-10°C in advance and 100mL sodium hydroxide Aqueous solution, after stirring for a period of time under the condition of ice-water bath, then remove the ice-water bath, react at room temperature for 10 hours, the reaction solution is allowed to stand for stratification, the water layer is acidified with concentrated hydrochloric acid, and the precipitated solid is recrystallized with ethanol-water solution to obtain the imide of the following structural formula Polypropylene-like β-crystal nucleating agent:

[0038] Hereinafter, for convenience of descripti...

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Abstract

The invention discloses an imide polypropylene beta crystal form nucleating agent. The agent has a structural general formula I, wherein n ranges from 0 to 20; R1 is nitryl, hydroxyl, amino, halogen or alkyl; R2 is one of the following three groups: H, alkyl and a group containing carboxyl, hydroxyl, halogen or heteroaromatic rings; and R3 is one of the following three groups: H, alkyl and a group containing carboxyl, hydroxyl, halogen or heteroaromatic rings. The invention also discloses a preparation method of the imide polypropylene beta crystal form nucleating agent. The imide polypropylene beta crystal form nucleating agent disclosed by the invention has the characteristics of high efficiency, easy diffusion, and green and non-toxic properties; the beta crystal content reaches 81%; the decomposition temperature is high and the nucleating agent cannot be decomposed under the condition that polypropylene is normally heated; the diffusion effect is good, and the performance of the polypropylene is obviously improved even if the additive amount is small.

Description

technical field [0001] The invention relates to a polypropylene beta crystal form nucleating agent and a preparation method thereof, in particular to an imide polypropylene beta crystal form nucleating agent and a preparation method thereof. Background technique [0002] The β crystal form of polypropylene is a metastable crystal form, belonging to the hexagonal crystal system, which can only be formed under special conditions (such as shearing, pressure or adding nucleating agents), and has good toughness and impact resistance. [0003] Since LeugeringHJ. first discovered that γ-quinacridone has β-nucleation effect on polypropylene in the 1960s, researchers have paid more and more attention to the development and mechanism of β-crystal nucleating agents. In 1981, Shi Guanyi of the Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences disclosed some dicarboxylic acids and some metal oxides and hydroxides in the second main group of the periodic table in patent...

Claims

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Application Information

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IPC IPC(8): C07D403/06C07D209/48C08K5/3445C08K5/3417C08L23/12
CPCC07D209/48C07D403/06C08K5/3417C08L2205/242C08L23/12
Inventor 郑德陈俊钱伟卢永军郑贤
Owner 广东炜林纳新材料科技股份有限公司
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