Superhigh melt index polypropene and preparing process thereof

A technology of melt index and polypropylene, applied in the field of polypropylene resin, can solve the problem of less reports of polypropylene production, and achieve the effect of stable melt index and easy operation process.

Inactive Publication Date: 2003-10-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology uses special chemical agents called organopolybinsensitive polymer particles made by mixing different types of plastic materials together at high temperatures without causing them break down overtime. These small pieces are mixed into regular shapes like pellets before being used on injection molding machines. By adding these tiny parts onto existing plastomer products instead of just create new ones, we aim to improve their quality and performance.

Problems solved by technology

Technological Problem addressed in this patents relates to finding ways to improve the quality of nylon-6 homopolymer produced from propylenebutan monomers during the fabricating processes like blowmeldings, filters made through thermoplasma bags, tires, and others due to improved heat transfer property required when making them faster and more energy efficient compared to existing techniques. Existing solutions involve modifying the physical structure of poly(paraphenate), copolymers, or blending together different types of polyamide resin pellets. These modifications result in decreased strength retention time and reduced melt elongations needed for certain applications requiring higher levels of tensile force.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] After metering and feeding, mix the F401 polypropylene powder with a weight ratio of 99:1 and di-tert-butyl peroxide in a GH200 high-speed mixer. Extrude at 195° C. in a single-screw extruder with D=20 at a speed of 60 to 80 rpm, cool and granulate to obtain degraded masterbatches.

[0029] Using F401 polypropylene resin as the matrix, add 30% by weight of the above-mentioned degradable masterbatch, after mixing evenly, carry out melt extrusion on a twin-screw extruder with φ35mm×2, L / D=25 at 190-200°C Granules, screw speed 60 ~ 75rpm. The extrudate was cooled and granulated to obtain the final product with a melt index of 403g / 10min.

Embodiment 2

[0031] After metering and feeding, mix the F401 polypropylene powder with a weight ratio of 99:1 and di-tert-butyl peroxide in a GH200 high-speed mixer. Extrude at 190° C. in a single-screw extruder with D=20 at a speed of 60 to 80 rpm, cool and granulate to obtain degraded masterbatches.

[0032] Using F401 polypropylene resin as the matrix, add 40% by weight of the above-mentioned degradable masterbatch, after mixing evenly, carry out melt extrusion on a twin-screw extruder with φ35mm×2, L / D=25 at 190-200°C Granules, screw speed 60 ~ 75rpm. The extrudate was cooled and granulated to obtain the final product with a melt index of 750g / 10min.

Embodiment 3

[0034] After metering and feeding, mix the F401 polypropylene powder with a weight ratio of 99:1 and di-tert-butyl peroxide in a GH200 high-speed mixer. Extrude at 1200° C. in a single-screw extruder with D=20 at a speed of 60 to 80 rpm, cool and granulate to obtain degraded masterbatches.

[0035] Using F401 polypropylene resin as the matrix, add 35% by weight of the above-mentioned degradable masterbatch, after mixing evenly, carry out melt extrusion on a twin-screw extruder with φ72mm×2, L / D=35 at 190-200°C Granules, screw speed 60 ~ 70rpm. The extrudate was cooled and granulated to obtain the final product with a melt index of 580g / 10min.

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Abstract

A polypropene with ultra-high fusing index (400 g/min) is prepared from conventional polyacrylic resin (50-70%) and degradating mother particles (30-50%) through blending extruding conventional polypropene powder with organic peroxide in a screw extruder, cooling, granulating to obtain said degradating mother particles, mixing conventional polyacrylic resin with said mother particles, extruding, cooling, and granulating.

Description

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Claims

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Application Information

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Owner DONGHUA UNIV
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