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Rare earth compound nucleating agent and application thereof

A technology of rare earth compounding and nucleating agent, which is applied in the field of high-performance materials, can solve the problems of poor modification performance and high cost, and achieve the effects of low cost, improved impact strength and convenient use

Inactive Publication Date: 2012-01-04
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of rare earth composite nucleating agent and application thereof, solve the problems such as poor modification performance and high cost of polypropylene beta nucleating agent in the prior art, the rare earth composite nucleating agent of the present invention is used to improve Polypropylene β crystal content and impact resistance, effective and easy to obtain, can induce polypropylene PP to produce a higher content of β crystal, improve the impact strength of polypropylene, the nucleating agent will not affect the appearance of the product, easy to use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The preparation method of rare earth composite nucleating agent is as follows:

[0014] (1) Synthesis of main nucleating agent lanthanum stearate or lanthanum benzoate: lanthanum oxide is dissolved in hydrochloric acid to form lanthanum trichloride solution, wherein the molar mass ratio of lanthanum oxide and hydrochloric acid is 1: 5~1: 7, and then React with 0.5mol / L-0.7mol / L sodium stearate or sodium benzoate solution, wherein the molar mass of sodium stearate or sodium benzoate solution is 5-7 times that of lanthanum oxide. Adjust the pH of the solution to 6-9 with hydrochloric acid or sodium hydroxide, filter after reacting for 2-4 hours, wash the filter cake with distilled water several times (generally 1-4 times), and then wash it with absolute ethanol several times (generally 1-4 times). 3 times), and dried and ground for use;

[0015] (2) Stir the auxiliary nucleating agent and the lanthanum stearate or lanthanum benzoate obtained in step (1) according to the ...

Embodiment 1

[0019] 1Kg polypropylene and 1g rare earth composite nucleating agent (wherein the main nucleating agent lanthanum stearate or lanthanum benzoate is 0.6g; the auxiliary nucleating agent zinc oxide is 0.4g, prepare this rare earth composite nucleating agent according to the steps in the specific embodiment agent), uniformly mixed in a high-speed mixer, extruded and granulated in a twin-screw extruder at 175-220°C, and injected into a standard spline at 180-210°C, denoted as PP1.

[0020] Test the impact properties according to GB / T 104-393, test the heat distortion temperature according to GB / T 1634-2004, measure the tensile properties according to GB / T 1040.2-2006 and measure the bending properties according to GB / T 9341-2008.

[0021] Pure PP is also made into standard splines according to the above process, and recorded as PPO for mechanical performance testing for comparison.

[0022] The test results are shown in Table 1.

[0023] Table 1 Mechanical properties of modified...

Embodiment 2

[0026] 1Kg polypropylene and 2g rare earth composite nucleating agent (wherein the main nucleating agent lanthanum stearate or lanthanum benzoate is 1.2g; auxiliary nucleating agent zinc stearate and stearic acid are each 0.4g, according to the specific embodiment The steps are to prepare the rare earth composite nucleating agent), uniformly mix in a high-speed mixer, extrude and granulate in a twin-screw extruder at 175-220°C, and inject into a standard spline at 180-210°C, denoted as PP2.

[0027] Test the impact properties according to GB / T 1043-93, test the heat distortion temperature according to GB / T 1634-2004, measure the tensile properties according to GB / T 1040.2-2006 and measure the bending properties according to GB / T 9341-2008.

[0028] Pure PP is also made into standard splines according to the above process, and recorded as PPO for mechanical performance testing for comparison.

[0029] The test results are shown in Table 2.

[0030] Table 2 Mechanical propertie...

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Abstract

The invention provides a rare earth compound nucleating agent and application thereof, belonging to the technical field of material high performance modification and solving the problems that polypropylene beta nucleating agent has bad modification performance in the prior art, and the like. The rare earth compound nucleating agent comprises a main nucleating agent and an auxiliary nucleating agent; the proportion by weight of the main nucleating agent and the auxiliary nucleating agent is 60: 40 to 90:10. The rare earth compound nucleating agent and the polypropylene are blended and prilled so as to increase the performance of the polypropylene. The rare earth compound nucleating agent is used for increasing polypropylene beta cystal formation content and impact resistance capability, iseffective and easily obtained, can induce the polypropylene PP to generate beta crystal formation with higher content, increases the impact resistant strength of the polypropylene. The nucleating agent does not affect the appearance of the product and is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of material high performance, and in particular relates to a rare earth composite nucleating agent and its application. Background technique [0002] Polypropylene (PP), as an abundant and inexpensive general-purpose thermoplastic, is widely used in several industries. PP is a semi-crystalline polymer, and its crystallinity, crystal form and crystal structure play a key role in its performance. The crystal structure of isotactic polypropylene (PP) can be divided into five types: α, β, γ, δ and pseudo-hexagonal. Currently commercialized PP is mainly in the α crystal form, but the α crystal form is a monoclinic crystal system, which has disadvantages such as poor toughness. The β crystal form is a hexagonal crystal system, and the PP of the β crystal form has good impact toughness. Therefore, increasing the content of the β crystal form in PP can greatly improve the performance of PP. [0003] Since the β c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/098C08K3/22C08L23/12
Inventor 郑玉婴
Owner FUZHOU UNIV