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

Abstract

The invention relates to a method of producing high-gloss heat-resistance modification 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 2, 2-methylene-di (4, 6-di-tert-butylphenoxyl) sodium phosphate and 3MgO2.4SiO2.H2O; lubricant is monopalmitin; antioxidant is four (3, (3, 5-di-tert-buty-4-hydroxyphenyl)) propionate pentaerythritol ester, phosphorous acid three (2, 4-tert-butylphenyl) ester and thiodipropionate bisoctadecanol ester. The modified polypropylene resin produced by the invention not only has good heat resistance, but also has excellent luster of products, which can reach above 98 GU20 degrees.

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...