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Nucleating agent modifying and preparing method of high-performance polypropylene

A technology of nucleating agent and polypropylene, which is applied in the field of nucleating agent modification and preparation of high-performance polypropylene, which can solve the problems of difficult dispersion, uneven nucleation, large amount of nucleating agent, etc., and achieve excellent performance, The effect of obvious nucleation and low cost

Active Publication Date: 2014-04-16
NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of adding nucleating agent outside the kettle is simple, but it has the disadvantages of large amount of nucleating agent added, not easy to disperse and uneven nucleation

Method used

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  • Nucleating agent modifying and preparing method of high-performance polypropylene
  • Nucleating agent modifying and preparing method of high-performance polypropylene
  • Nucleating agent modifying and preparing method of high-performance polypropylene

Examples

Experimental program
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Embodiment Construction

[0014] Reaction raw materials: use high-purity nitrogen and high-purity hydrogen with a purity of ≥99.99%, and use triethylaluminum (AlEt 3 ) as co-catalyst for polypropylene catalyst (HDC), 0.1mol / L hexane as external electron donor, acetone or hexane oil as solvent.

[0015] 1g of nucleating agent, appropriate amount of modifier, 30mL of acetone solvent, stirred for 2h, heated at 50°C to remove the solvent under reduced pressure to obtain a dry white solid, added 20mL of hexane, stirred at room temperature for 10min, filtered, then added hexane 20mL, stirred at room temperature for 10min, and repeated 5 times in total. The purpose was to wash off the excess modifier that did not participate in the reaction, and no aluminum was detected in the filtrate of the 5th time. White powder after drying.

[0016] The purpose of washing off the excess unreacted modifier is to ensure that no additional alkylaluminum is introduced during polymerization, so as to compare the accuracy wit...

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Abstract

The invention provides a nucleating agent modifying and preparing method of high-performance polypropylene. The method, under a circumstance of not changing polymerization conditions, can modify a nucleating agent or adopt special feeding ways to shield deactivated components after poisoning of a catalyst, so that active ingredients of the nucleating agent are completely released in reaction nucleating and polymerizing processes to the greatest extent; functional group of the modified nucleating agent is free from adverse effect on activity of a main catalyst and free from reaction with a catalyst promoter and an electron donor, so that catalytic activity is basically not reduced, and the modified polypropylene is excellent in performance and obvious in nucleating action in a kettle; the prepared polypropylene is high in comprehensive performance.

Description

technical field [0001] The invention relates to a modification method for preparing a high-performance polypropylene nucleating agent by nucleating in a kettle. Background technique [0002] Polypropylene (PP) has excellent rigidity, processability and electrical insulation properties. It is a general-purpose polymer material with excellent comprehensive properties. It has been widely used in electrical appliances, automobiles, construction, packaging and other fields. Due to the shortcomings of polypropylene, such as poor notched impact performance, insufficient high-temperature rigidity, and low static compressive strength, nucleating agents need to be added to improve crystallinity and purify the size of spherulites. [0003] At present, the methods of producing polypropylene in industry are mainly adding nucleating agent outside the kettle and synthesizing inside the kettle. The process of adding nucleating agent outside the kettle is simple, but it has the disadvantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/06C08F2/44C08K9/00C08K5/56C08K5/5419C08L23/12
Inventor 马进韩彩琴杨惠琳马利海
Owner NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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