A kind of anti-ultraviolet polypropylene composition and its prepared polypropylene and polypropylene film

A polypropylene composition and polypropylene technology, applied in the field of plastic processing, can solve the problems of reduced UV shielding ability, limited improvement effect, and agglomeration of large particles, achieving small particle size, narrow particle size distribution, and not easy to agglomerate Effect

Active Publication Date: 2019-10-01
XIAMEN JUFU PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the way to increase the specific surface area is to reduce the particle size as much as possible, but the smaller the particle size, the more difficult it is to disperse, and it is easy to agglomerate into large particles, and the shielding ability to ultraviolet light will decrease instead.
At present, there are many reports in the patents on the use of inorganic nanoparticles to improve the UV resistance of PP, but the improvement effect is limited, and the improvement of the light stability of PP needs further improvement

Method used

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  • A kind of anti-ultraviolet polypropylene composition and its prepared polypropylene and polypropylene film
  • A kind of anti-ultraviolet polypropylene composition and its prepared polypropylene and polypropylene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A method for preparing an anti-ultraviolet polypropylene film. The method for preparing the film includes the following steps:

[0071] (1) Surface modification of cerium oxide: The cerium oxide with the original particle size of 1μm is pressed into a cylindrical shape with a tablet press as a solid target; the surface modifier and ethanol are mixed at a mass ratio of 1:10, as Mobile liquid phase

[0072] The solid target is immersed in the mobile liquid phase, the height of the part of the solid target immersed in the mobile liquid phase is 0.2 mm, and the flow rate of the mobile liquid phase is 0.01 ml / s;

[0073] The surface of the solid target immersed in the continuous flowing liquid phase is bombarded with a high-energy laser beam to obtain a suspension of surface modifier grafted on the surface of cerium oxide, and the cerium oxide is decomposed into Nano size, the modified cerium oxide particle size is D 50 =80nm, at the same time D 97 =100nm, D 5 =60nm;

[0074] The o...

Embodiment 2

[0082] A method for preparing an anti-ultraviolet polypropylene film. The method for preparing the film includes the following steps:

[0083] (1) Surface modification of cerium oxide: the cerium oxide with the original particle size of 2μm is pressed into a cylindrical shape with a tablet press as a solid target; the surface modifier and ethanol are mixed in a ratio of 1:10 by mass, as Mobile liquid phase

[0084] The solid target is immersed in the mobile liquid phase, the height of the part of the solid target immersed in the mobile liquid phase is 0.6 mm, and the flow rate of the mobile liquid phase is 0.02 ml / s;

[0085] The surface of the solid target immersed in the continuous flowing liquid phase is bombarded with a high-energy laser beam to obtain a suspension of surface modifier grafted on the surface of cerium oxide, and the cerium oxide is decomposed into Nano size, the modified cerium oxide particle size is D 50 =100nm, at the same time D 97 =120nm, D 5 =80nm;

[0086] T...

Embodiment 3

[0094] A method for preparing an anti-ultraviolet polypropylene film. The method for preparing the film includes the following steps:

[0095] (1) Surface modification of cerium oxide: The cerium oxide with the original particle size of 3μm is pressed into a cylindrical shape with a tablet press as a solid target; the surface modifier and ethanol are mixed in a ratio of 1:10 by mass, as Mobile liquid phase

[0096] The solid target is immersed in the mobile liquid phase, the height of the part of the solid target immersed in the mobile liquid phase is 1 mm, and the flow rate of the mobile liquid phase is 0.04 ml / s;

[0097] The surface of the solid target immersed in the continuous flowing liquid phase is bombarded with a high-energy laser beam to obtain a suspension of surface modifier grafted on the surface of cerium oxide, and the cerium oxide is decomposed into Nano size, the modified cerium oxide particle size is D 50 =150nm, at the same time D 97 = 170nm, D 5 =130nm;

[0098] T...

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Abstract

The invention discloses surface modified nano-cerium oxide as well as a preparation method and use thereof. The invention further provides a polypropylene composition containing the modified nano-cerium oxide and polypropylene and a polypropylene film which are prepared from the composition. The surface modified nano-cerium oxide is prepared by the steps of reacting by virtue of large-particle cerium oxide and a surface modifier in a high-temperature and high-pressure microcell generated by laser bombardment so as to reduce the size of cerium oxide to a nano scale, and grafting the surface with the surface modifier. The surface modified nano-cerium oxide has the beneficial effects that on one hand, cerium oxide can be effectively subjected to surface treatment; on the other hand, nano-scale cerium oxide can be prepared from micron-scale cerium oxide, so that the material cost is saved; and furthermore, a columned cerium oxide solid target can continuously sink into a flow liquid phase, so that the preparation method has the advantage that the continuous operation is realized.

Description

Technical field [0001] The invention relates to the technical field of plastic processing, in particular to an ultraviolet-resistant polypropylene composition and polypropylene and polypropylene films prepared therefrom. Background technique [0002] Ultraviolet rays in sunlight are the main cause of aging of polymer materials. Polymer materials will absorb ultraviolet rays and initiate self-oxidation, leading to polymer degradation. This process is called photoredox or photoaging. Although ultraviolet light only accounts for about 5% of sunlight, its energy is huge, and its energy is enough to break the chemical bonds of polymers, break and cross-link the molecular chains, and cause malignant changes in mechanical properties. At the same time, the color will also change. [0003] Ultraviolet rays can be divided into short-wave regions (ie UVC: 200nm-290nm), medium-wave regions (ie UVB: 290nm-320nm) and long-wave regions (ie UVA: 320nm-400nm) according to wavelength. [0004] When s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K9/06C08K3/22
Inventor 林凤龙宋立军
Owner XIAMEN JUFU PLASTIC PRODS
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