Modified polypropylene resin and preparation method thereof

A polypropylene resin and modification technology, applied in the field of polypropylene, can solve the problems of high nucleating agent content and non-water-soluble nucleating agent, and achieve the effects of simple preparation process, low processing cost and reduced cost

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101845171A discloses a polypropylene stiffening composition, which is improved by sodium benzoate and bis[2,2'-methylene-bis(4,6-di-tert-butylphenyl)]sodium phosphate. It improves the bending performance, impact strength and heat distortion temperature of PP products, and has a better modification effect than adding a single-component nucleating agent, and has a certain synergistic effect, but the required nucleating agent content is higher
Chinese patent 200780012801.8 uses water-soluble nucleating agent HPN-68 to be dissolved in water as the water phase, and forms a microemulsion with other components such as oil phase, surfactant, co-surfactant, etc. After adding polypropylene, the nucleating agent can Better dispersion in polymers, improving crystallization efficiency, but only involves water-soluble nucleating agents, and many nucleating agents are not water-soluble

Method used

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  • Modified polypropylene resin and preparation method thereof
  • Modified polypropylene resin and preparation method thereof
  • Modified polypropylene resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] NA11[2,2'-methylenemetha-bis(4,6-di-n-butylphenol)sodium phosphate] (Zhongda Chemical Co., Ltd., brand NP-508) was dissolved in absolute ethanol ( analytically pure); dilute the silica sol with deionized water to a deionized aqueous solution with a silica particle concentration of 18wt%; stir with a magnetic stirrer, add in sequence the absolute ethanol in which NA11 has been dissolved, and 1135 liquid antioxidant [β -(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate, Guangzhou Zhiyi Trading Co., Ltd.], Tween 80 (commercially available), deionized water dispersed with silica, The mass percentages of the above components are 54wt%, 18wt%, 18wt%, and 10wt%, respectively. A magnetic stirrer is used for stirring. The rotational speed of the magnetic stirrer is 200 rpm (revolutions per minute), and the stirring time is 5 minutes. The mixed microemulsion obtains 1# binary composite nucleating agent.

Embodiment 2

[0035] NA11[2,2'-methylenemetha-bis(4,6-di-n-butylphenol)sodium phosphate] (Zhongda Chemical Co., Ltd., brand NP-508) was dissolved in absolute ethanol ( analytically pure); dilute the silica sol with deionized water to a deionized aqueous solution with a silica particle concentration of 18wt%; stir with a magnetic stirrer, add in turn the absolute ethanol in which NA11 has been dissolved, and 1520 liquid antioxidant [2 , 4-bis(n-octylthiomethylene) o-cresol, Guangzhou Zhiyi Trading Co., Ltd.], Tween 80 (commercially available), deionized water dispersed with silicon dioxide, the mass percentage of the above components The contents are 54wt%, 18wt%, 18wt%, and 10wt%, respectively. A magnetic stirrer is used for stirring. The rotating speed of the magnetic stirrer is 200 rpm (revolutions per minute), and the stirring time is 5 minutes. The mixed microemulsion obtains 2# binary composite nucleating agent.

Embodiment 3

[0037]NA11[2,2′-methylenemetha-bis(4,6-di-n-butylphenol)sodium phosphate] (Zhongda Chemical Co., Ltd., brand NP-508) was dissolved in absolute ethanol at a concentration of 10wt% (analytical pure); dilute the silica sol with deionized water to a deionized aqueous solution with a silica particle concentration of 10wt%; stir with a magnetic stirrer, add in sequence the absolute ethanol in which NA11 is dissolved, and 1135 liquid antioxidant [β- (3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate, Guangzhou Zhiyi Trading Co., Ltd.], Tween 80 (commercially available), deionized water dispersed with silica, the above The mass percentages of the components are 40wt%, 20wt%, 20wt%, and 20wt%, respectively. A magnetic stirrer is used for stirring. The rotational speed of the magnetic stirrer is 200 rpm (rotation per minute), and the stirring time is 5 minutes. The mixed microemulsion obtains 3# binary composite nucleating agent.

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Abstract

The invention discloses a modified polypropylene resin and a preparation method thereof. The modified polypropylene resin comprises polypropylene resin and a modification assistant and the polypropylene resin and the modification assistant are mixed. The modification assistant is a microemulsion of a liquid anti-oxidant and a binary composite nucleating agent. The binary composite nucleating agent comprises silica and 2,2'-methylene-di(4,6-di-n-butylphenol)phosphoric acid sodium and a weight ratio of silica to 2,2'-methylene-di(4,6-di-n-butylphenol)phosphoric acid sodium is in a range of 95: 5 to 5: 95. The preparation method comprises that the above ingredients are subjected to melt blending according the above use amount ratio so that the modified polypropylene resin is obtained. The modified polypropylene resin has obviously improved polypropylene crystallinity and greatly improved mechanical properties.

Description

technical field [0001] The invention relates to the field of polypropylene, in particular to a modified polypropylene resin and a preparation method. Background technique [0002] Polypropylene is a widely used thermoplastic with low price and good overall performance. By adding nucleating agent, the mechanical and optical properties of polypropylene products can be further improved, and the high performance of polypropylene can be realized. Nucleating agents for polypropylene are a class of additives used to improve the crystallization behavior of polypropylene, thereby improving its physical, mechanical and thermodynamic properties. Nucleating agents are divided into inorganic, sorbitol, phosphate, rosin and polymer nucleating agents. [0003] At present, the polypropylene nucleating agent widely used in the market is an organic nucleating agent, such as NA11 [2,2'-methylene methane-bis(4,6-di-n-butylphenol) sodium phosphate], NA-21[ Methylenebis(2,4-di-tert-butylphenyl)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/00C08K5/527C08K3/36
CPCC08K3/36C08K5/527C08K9/00C08K13/02C08L2205/24C08L23/12C08L23/14
Inventor 郭敏刘轶群张杨潘国元严昊
Owner CHINA PETROLEUM & CHEM CORP
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