Beta nucleating agent, preparation method and application thereof

A β-nucleating agent, pp-g-mah technology, applied in the field of polymer materials, can solve the problems of low quality and small improvement of mechanical properties, etc.

Inactive Publication Date: 2019-03-29
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent CN1282750A describes a preparation method of a beta nucleating agent of rare earth elements, the nucleating agent is composed of C 4 ~C 28 Carboxylate and C 4 ~C 28 Composition of carboxylic acid and / or its derivatives, in theory, a relatively high content of β-crystal form can be obtained, but because the organic acid is a small molecular structure, it is easy to precipitate and decompose during PP processing, so the β-crystal form actually obtained is not Not high, little improvement in mechanical properties of PP

Method used

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  • Beta nucleating agent, preparation method and application thereof
  • Beta nucleating agent, preparation method and application thereof

Examples

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preparation example Construction

[0051] The preparation method of 0.5mol / L hydrochloric acid standard solution is as follows:

[0052] Weigh 22ml of hydrochloric acid, dilute to 500ml of water, and shake well.

[0053] The calibration method of 0.5mol / L hydrochloric acid standard solution is as follows:

[0054] Weigh 0.95g of the working standard reagent anhydrous sodium carbonate, which is burned in a high-temperature furnace at 270°C-300°C to constant weight, dissolve it in 50ml of water, add 10 drops of bromocresol green-methyl red indicator solution, and use the prepared Titrate the hydrochloric acid solution until the solution turns from green to dark red, boil for 2 minutes, continue to titrate after cooling until the solution turns dark red again, and do a blank experiment at the same time. Then the concentration of the prepared hydrochloric acid standard solution is C(HCl)=1000m / (V 1 -V 2 ) M, where M is 52.994, which is half of the molecular weight of sodium carbonate; V 1 is the volume of hydro...

Embodiment 1

[0056] Put 100 parts of polypropylene BX3920 (purchased from SK, South Korea) in a twin-screw extruder, extrude and granulate to obtain pellets, add the pellets to a flask equipped with a stirring and reflux device, and pour into the flask xylene, and heated and stirred for more than 8 hours to obtain a polypropylene (PP) solution. Among them, polypropylene BX3920 is a copolymerized polypropylene.

[0057] Dissolve 1 part of dibenzoyl peroxide (BPO) and 12 parts of MAH in xylene to obtain a mixed solution, pour the mixed solution into a three-necked flask, install a stirring, reflux and dropping funnel device, and add For the above PP solution, when the mixed solution boils, slowly add the above PP solution dropwise into the three-necked flask. After reacting for 4 hours, pour the liquid in the three-necked flask into a beaker, add acetone, filter under reduced pressure, and wash to obtain a white solid product PP-g-MAH. The grafting rate of maleic anhydride was tested, and t...

Embodiment 2

[0061] Add 100 parts of polypropylene PPH-YD-225 (purchased from Hengyuan Petrochemical) into a flask equipped with a stirring and reflux device, pour xylene into the flask, and heat and stir for more than 8 hours to obtain a PP solution. Among them, polypropylene PPH-YD-225 is homopolymerized polypropylene.

[0062] Dissolve 1 part of dibenzoyl peroxide (BPO) and 12 parts of MAH in xylene to obtain a mixed solution, pour the mixed solution into a three-necked flask, install a stirring, reflux and dropping funnel device, and add the above-mentioned PP solution, when the mixed solution boils, slowly add the above PP solution dropwise into the three-necked flask. After reacting for 4 hours, pour the liquid in the three-necked flask into a beaker, add acetone, filter under reduced pressure, and wash to obtain a white solid product PP-g-MAH. The grafting rate of maleic anhydride was tested, and the result was 4.3%.

[0063] Weigh 10 g of NaOH solid and dissolve it in 200 mL of de...

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Abstract

The invention relates to a preparation method of a beta nucleating agent. The method comprises the steps of: adding PP-g-MAH into an alkaline solution with a concentration of 0.05g/mL-0.15g/mL according to a mass-volume ratio of (0.2-2):1, with a unit of g/mL, and conducting heating and stirring to obtain a clarified solution; and adding a compound containing lanthanum ions into the clarified solution, with the mass ratio of the PP-g-MAH to the compound containing lanthanum ions being 1:(0.2-1.2), and conducting stirring, filtering and drying to obtain the product. The beta nucleating agent prepared according to the invention can effectively induce polypropylene to produce high content beta crystal forms and improve the rigidity and toughness of polypropylene material.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a beta nucleating agent and its preparation method and application. Background technique [0002] Polyolefin is a general-purpose plastic with incomplete crystallization, and its crystallization behavior such as crystallinity, crystallization speed, crystal shape and spherulite size directly affects the processing and application performance of the product. Polyolefin nucleating agent is a new functional plastic additive, which can promote the crystallization of resin, change the crystallization behavior and crystal form of resin, and make the size of spherulite finer. By changing the crystallization behavior of polyolefin resin, the crystallization speed can be improved. And crystallinity, to improve the transparency, rigidity, surface gloss, impact strength, heat distortion temperature and shorten the molding cycle of the product, improve and enhance the processing performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L51/06C08F8/44C08F255/02C08F222/06
CPCC08L23/10C08F8/44C08F255/02C08L51/06C08L2205/24C08F222/06
Inventor 王灿耀杨迅冉红川于海鸥桑杰
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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