Preparation method of polypropylene composition

A polypropylene composition, polypropylene technology, applied in the field of materials to achieve the effects of inhibiting thermal and oxygen degradation, wide application range, and avoiding adverse effects

Inactive Publication Date: 2018-11-02
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual processing process, it is also necessary to comprehensively consider the influence of the pore size, pore

Method used

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  • Preparation method of polypropylene composition
  • Preparation method of polypropylene composition
  • Preparation method of polypropylene composition

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1

[0048] Weigh 50kg polypropylene powder (melt flow rate 0.2g / 10min), 25g antioxidant 1010, 50g antioxidant 168, 25g halogen absorbent calcium stearate, 500g medical stone (granularity 2500 mesh), 500 g of zinc ricinoleate and 5 kg of talc powder, after being stirred and thoroughly mixed, are added to a twin screw extruder with a L / D ratio of 48:1, the feeding speed is 50 g / min, and the screw speed is 100 rpm ; Supercritical carbon dioxide fluid is added to the extruder from the second heating zone of the twin-screw extruder, the mass of the supercritical carbon dioxide fluid is 20% of the mass of polypropylene, and the addition rate is 10g / min. The twin-screw extruder is divided into 10 heating zones. The temperature of the first heating zone is 180°C, and the temperature of the other heating zones is 160°C to 220°C. Vacuum devolatilization in the 8th zone, extrude the pelletized strips and then water-cooled pelletizing to obtain the product.

Example Embodiment

[0049] Example 2

[0050] Weigh 50kg polypropylene powder (melt flow rate 0.5g / 10min), 50g antioxidant 1010, 100g antioxidant 168, 25g halogen absorbent calcium stearate, 1500g medical stone (granularity 2500 mesh), 250 grams of zinc ricinoleate and 7.5 kg of talc powder, after being stirred and thoroughly mixed, are added to a twin-screw extruder with a length-to-diameter ratio L / D of 48:1, the feeding speed is 50g / min, and the screw speed is 100 rpm. Points; supercritical carbon dioxide fluid is added to the extruder from the second heating zone of the twin-screw extruder, the mass of the supercritical carbon dioxide fluid is 10% of the mass of polypropylene, and the addition rate is 5g / min. The twin-screw extruder is divided into 10 heating zones. The temperature of the first heating zone is 180°C, and the temperature of the other heating zones is 160°C to 220°C. Vacuum devolatilization in the 8th heating zone, extrude the pelletized strips through water cooling and pelletizi...

Example Embodiment

[0051] Example 3

[0052] Weigh 50kg polypropylene powder (melt flow rate 2.5g / 10min), 75g antioxidant 1076, 100g antioxidant 168, 50g halogen absorbent calcium stearate, 2500g medical stone (granularity 2500 mesh), 350 grams of zinc ricinoleate and 10 kg of talc powder, after being stirred and thoroughly mixed, are added to a twin-screw extruder with a L / D ratio of 48:1, the feeding speed is 50 g / min, and the screw speed is 100 rpm ; Supercritical carbon dioxide fluid is added to the extruder from the second heating zone of the twin-screw extruder, the mass of the supercritical carbon dioxide fluid is 30% of the mass of polypropylene, and the addition rate is 15g / min. The twin-screw extruder is divided into 10 heating zones. The temperature of the first heating zone is 180°C, and the temperature of the other heating zones is 160°C to 220°C. Vacuum devolatilization in the 8th heating zone, extrude the pelletized strips through water cooling and pelletizing to obtain the product....

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Abstract

The invention discloses a preparation method of a polypropylene composition and belongs to the technical field of materials. The composition at least comprises 100 parts of polypropylene, 0.05-0.15 part of a primary antioxidant, 0.1-0.3 parts of an auxiliary antioxidant and 0.05-0.2 parts of a halogen absorbent. Supercritical carbon dioxide is used for assisting in extrusion; heat and oxygen degradation of polypropylene is effectively inhibited in an extrusion process; at the same time, dissolution of micromolecular volatile matters is greatly accelerated; and the micromolecular volatile matters are removed in a pressure release extraction manner in front of a neck mold of an extruder. The method is simple in technology, wide in application scope and low in production cost.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a low-odor propylene polymer composition. Background technique [0002] Polypropylene (PP) is a polymer compound obtained by polymerizing propylene. Due to its rich raw materials and relatively simple synthesis process, compared with other general-purpose thermoplastics, PP has low relative density, low price, and outstanding stress resistance, cracking and wear resistance, and is the fastest growing among general-purpose thermoplastics. Varieties, increasingly important in economic construction and people's lives, have become the fastest growing varieties of plastics, and are widely used in various fields such as automobiles, home appliances, daily necessities, and packaging. However, polypropylene itself and various additives usually bring in a large odor, which limits its application in some fields, and with the development of the nationa...

Claims

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Application Information

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IPC IPC(8): C08L23/10C08K13/02C08K5/134C08K5/526C08K5/098C08K3/34C08K5/3492C08K5/527C08K13/04C08K7/26B29B9/06B29C47/92B29C48/92
CPCB29B9/06C08K3/34C08K5/098C08K5/1345C08K5/34924C08K5/526C08K5/527C08K7/26C08K13/02C08K13/04C08K2201/003C08K2201/014C08L23/10Y02P20/54
Inventor 左胜武袁小亮邱敦瑞王晶徐振明傅勇
Owner SINOPEC YANGZI PETROCHEM
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