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Polypropylene nucleater and preparation method thereof

The technology of polypropylene nucleating agent and tetraisopropyl titanate is applied in the field of polypropylene nucleating agent and its preparation, which can solve the problems of high melting point, high price, poor compatibility and dispersibility, etc. Crystallization temperature, the effect of improving mechanical properties

Inactive Publication Date: 2009-04-29
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has a high melting point, generally greater than 300°C, poor compatibility and dispersion with polypropylene and high price

Method used

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  • Polypropylene nucleater and preparation method thereof
  • Polypropylene nucleater and preparation method thereof
  • Polypropylene nucleater and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0015] Take 0.1 mol of tetraisopropyl titanate and 0.3 mol of p-tert-butylbenzoic acid, and carry out the reaction at 60 °C, and the amount of alcohol removed is taken as the reaction end point. After the reaction is completed, 0.5 mol of 95% alcohol is added to hydrolyze the unreacted tetraisopropyl titanate. After the hydrolysis is complete, add 10% NaOH solution to neutralize to pH 8, then filter, wash with water, dry and grind to obtain the nucleating agent.

[0016] Take 100 parts of iPP (brand name is PPH-XD-045), take 0.3 part of the nucleating agent prepared above, after fully mixing, heat to 210°C on a flat vulcanizer, mold it into a 2mm thick plate, and quickly cool it with cold water. Take a small sample for DSC test on DSC200PC Differential Scanning Calorimeter. The results show that after adding the nucleating agent, the crystallization temperature T c =127°C.

Embodiment approach 2

[0018] Take 0.1 mol of tetraisopropyl titanate and 0.4 mol of p-tert-butylbenzoic acid, and carry out the reaction at 130°C, and the amount of alcohol removed is taken as the reaction end point. After the reaction is completed, 0.5 mol of 95% alcohol is added to hydrolyze the unreacted tetraisopropyl titanate. After the hydrolysis is complete, add 10% NaOH solution to neutralize to pH 8, then filter, wash with water, dry and grind to obtain the nucleating agent.

[0019] Take 100 parts of iPP (brand name is PPH-XD-045), take 0.3 part of the nucleating agent nucleating agent prepared above, after fully mixing, prepare samples according to Embodiment 1 and conduct DSC test. The results show that after adding the nucleating agent, the crystallization temperature T C =130°C.

Embodiment approach 3

[0021] Take 0.1 mol of tetraisopropyl titanate and 0.4 mol of benzoic acid, and carry out the reaction at 70 °C, and the amount of alcohol removed is taken as the reaction end point. After the reaction is completed, 0.5 mol of 95% alcohol is added to hydrolyze the unreacted isopropyl titanate. After complete hydrolysis, add 10% LiOH solution to neutralize to pH 8, then filter, wash with water, dry and grind to obtain nucleating agent.

[0022] Take 100 parts of iPP (brand name: PPH-XD-045), take 0.6 part of the nucleating agent prepared above, and after fully mixing, prepare samples according to Embodiment 1 and conduct DSC test. The results show that after adding the nucleating agent, the crystallization temperature T C =126°C.

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Abstract

The invention provides a polypropylene nucleating agent and a preparation method thereof, which belongs to the research field of polypropylene nucleation and in particular relates to an aromatic acyl titanic acid, as well as a saline polypropylene nucleating agent and a preparation method thereof. The structural formula of the nucleating agent is as above, wherein in the formula, n can be equal to 1, 2, 3 or 4; M is H, Na or Li; and R is H, methyl, ethyl or p-tert-butyl. When the addition amount of polypropylene is 0.15 to 0.6 percent of the mass of the polypropylene, the crystallization temperature and crystallinity degree of the polypropylene are effectively raised, and various mechanical properties of the polypropylene are improved. The nucleating agent has the advantages that the nucleating agent can remarkably raise the crystallization temperature of the polypropylene and copolymer thereof, and can optimize the mechanical properties of the polypropylene.

Description

technical field [0001] The invention relates to a polypropylene nucleating agent and a preparation method thereof, belonging to the field of polypropylene nucleation research, in particular to an aromatic acyl titanic acid and its salt polypropylene nucleating agent and a preparation method thereof. Background technique [0002] The use of polypropylene nucleating agent can change the crystallinity of polypropylene resin, accelerate its crystallization rate, improve the transparency of polypropylene, increase the heat distortion temperature, and improve the surface finish of the product. It is a simple and effective method for polypropylene modification. US.PAT.NO.5574174 invented a sorbitol-type polypropylene nucleating agent, which can improve the physical and chemical properties of polypropylene to a certain extent, but there are problems of more bubbles and greater odor. US.PAT.NO.4419473 and US.PAT.NO.5001174 propose improvements to the above problems and achieve certa...

Claims

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Application Information

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IPC IPC(8): C08K5/04C08L23/12
Inventor 薛建伟郭凤毕晓霞武六旺吕志平
Owner TAIYUAN UNIV OF TECH