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Transparent polypropylene composition

A technology of transparent polypropylene and composition, applied in the field of transparent polypropylene composition, can solve the problems of transparent polypropylene yellowing and transparent polypropylene, etc., and achieve the effects of stabilizing color and light, improving hue and eliminating yellowing

Inactive Publication Date: 2003-09-24
中国石化北京燕化石油化工股份有限公司树脂应用研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a transparent polypropylene composition which can better improve the appearance hue of transparent polypropylene and solve the yellowing phenomenon of existing transparent polypropylene products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10 and comparative example 1～9

[0015] Table 1, Table 2, and Table 3 respectively list the addition amounts of the above-mentioned components A to C in each embodiment and comparative example. After uniformly mixing the components A to C at a processing temperature of 180°C to 240°C, extrude and granulate with a screw extruder to obtain a granular polypropylene composition, and then test its properties according to conventional methods: test yellowness index Adopt GB2409-80; test haze using GB2410-80, using molded tablets with a thickness of 1 millimeter (mm). The test results are also listed in the table.

[0016] The yellowness index is an indicator for evaluating the quality of plastics. The yellowness index measured according to GB2409-80 is in good agreement with the degree of yellowness observed under sunlight, so it can be used to evaluate the quality of plastics.

[0017] If the yellowness index measured by this method is positive, it means that the material is yellow, and if it is negative, it mea...

Embodiment 1

[0021] In Example 1, component A is homopolypropylene with an MFR of 3.5 g / 10min, component B is 3,4-dimethyldibenzylidene sorbitol (DMDBS), and component C is disperse blue G.

Embodiment 2

[0022] In embodiment 2, component C is disperse blue RRL (C.I.Disperse Blue 72), and all the other components are the same as in embodiment 1.

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PUM

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Abstract

The present invention relates to a transparent polypropylene composite, said composite contains 100 portions of polypropylene, 0.05-6 portions of trasparent agent and 0.05X10 to the minus sixth-3X10 minus sixth anthraquinone disperse dye. Said composite is made up by using the above-mentioned all the material, mixing them according to a certain proportion uniformly, melting them at 180-240 deg.C,extruding by using twin-screw extruder and granulating the obtain the finished product.

Description

technical field [0001] The invention relates to a transparent polypropylene composition, in particular to a transparent polypropylene composition with good appearance and hue. Background technique [0002] The production of the existing transparent polypropylene composition generally involves adding a sorbitol-based transparent nucleating agent to the polypropylene. Due to a variety of reasons, the transparent polypropylene produced now is often insufficient in terms of appearance and color. For example, the appearance is yellow, the color of the product is yellow, the color and gloss are not good, and the transparency is uneven. [0003] In recent years, a technique of improving the transparency and hue of polypropylene with phthalocyanine organic pigments as nucleating agents has been reported (see "Chemical Times" 1999, No. 6, pp. 29-30 "Organic pigments as nucleating agents "Study on improving the transparency of polypropylene with additives" ar...

Claims

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Application Information

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IPC IPC(8): C08K5/08C08L23/12
Inventor 范海涛王德鑫赵涬陈文淑崔红跃
Owner 中国石化北京燕化石油化工股份有限公司树脂应用研究所
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