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Method for preparing heat-resisting modified polypropylene resin with high glossiness

A technology of polypropylene resin and manufacturing method, which is applied in the manufacturing field of polypropylene resin and can solve the problems of general lubricant performance and the like

Active Publication Date: 2008-06-04
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of improving the gloss of the product, the performance of these existing lubricants is relatively general.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0026] The selected nucleating agent, glycerol monopalmitate (i.e. lubricant), tetrakis [3, (3, 5-di-tert-butyl-4-hydroxyphenyl)] pentaerythritol propionate (i.e. antioxidant A ) and tris(2,4-tert-butylphenyl) phosphite (i.e. antioxidant B) were measured respectively and added to the mixer for mixing and homogenization. additive;

[0027] The above composite additives and polypropylene resin base material are measured separately, mixed uniformly, put into a twin-screw extruder for melt mixing and granulation. The residence time of the material in the screw is 2-4 minutes, the temperature of the screw is controlled at 145-210°C, and the rotational speed of the screw is controlled at 200-300 rpm. The obtained polypropylene resin particles are finished products after being cooled and dried.

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PUM

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Abstract

The invention relates to a method of producing high-gloss and heat-resistant modified polypropylene resin, which comprises: polypropylene resin group material is mixed with additive uniformly before granulation is produced by melting and mixing. The polypropylene resin group material is isotactic and homopolymerized polypropylene with fused mass flowing speed of 3-26g / 10min and 98.5-99.5 percent of isotactic index. The additive comprises nucleating agent, lubricant, antioxidant A and antioxidant B. The nucleating agent is two (4- tertiary butyl- phenoxyl) phosphate and 2, 2-methylene-di (4, 6-di-tert-butylphenoxyl) sodium phosphate or 2, 2-methylene-double (4, 6-di-tert-butylphenoxyl) phosphate amine salt; the lubricant is monopalmitin; the antioxidant A is four (3, (3, 5-di-tert-buty-4-hydroxyphenyl)) propionate pentaerythritol ester and the antioxidant B is phosphorous acid three (2, 4-tert-butylphenyl) ester. The modified polypropylene resin produced by the invention not only has good heat resistance, but also has excellent luster of products.

Description

technical field [0001] The invention relates to a production method of modified polypropylene resin, in particular to a production method of polypropylene resin modified by heat resistance by adding additives such as nucleating agent, lubricant and antioxidant through melt mixing. Background technique [0002] Modified polypropylene has good physical properties and relatively low price. As a general-purpose plastic, its use has been continuously expanded. Among them, heat-resistant modified polypropylene has largely replaced ABS, PC and other materials in household appliances. manufacturing. The surface of household electrical appliances is usually required to have excellent gloss, otherwise it will not be possible to obtain a good appearance and touch. For the modification to improve heat resistance, in recent years, the method of adding nucleating agents is generally used. Nucleating agents can make polypropylene crystals finer and increase crystal density, thereby improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/521B29B9/12B29C47/40
Inventor 单国荣陈根荣高道春胡雄薛振忠刘林华
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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