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Preparation method for transparent polypropylene composition with low-temperature impact resistance

A technology of polypropylene composition and transparent polypropylene, which is applied in the field of new materials, can solve problems such as low toughness, low rigidity, and poor transparency, and achieve the effects of reducing crystal particle size, improving transparency, and improving transparency

Inactive Publication Date: 2018-01-05
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the three materials, the homopolypropylene has the best rigidity, the transparency is between the other two, but the toughness is the lowest; the random copolymer polypropylene has the best transparency, the toughness is between the other two, but the rigidity is the lowest; Impact polypropylene has the best toughness, intermediate rigidity, but the worst transparency
At present, there is no transparent polypropylene material with good low temperature impact resistance

Method used

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  • Preparation method for transparent polypropylene composition with low-temperature impact resistance
  • Preparation method for transparent polypropylene composition with low-temperature impact resistance
  • Preparation method for transparent polypropylene composition with low-temperature impact resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 100 parts by weight (2000 grams) of propylene polymer powder (propylene-ethylene random copolymer, ethylene copolymerization amount 12wt%) is added in the high-speed mixer, and the POE of 10 parts by weight, 0.05 parts by weight (1.0 grams) (2,4-di-tert-butylphenyl ) phosphite triester, 0.05 parts by weight (1.0 grams) of halogen absorbent calcium stearate, 0.1 parts by weight (2 grams) of dicumyl peroxide, 1.0 parts by weight (20 grams) of co-crosslinking agent triene Propyl isocyanurate and 0.05 parts by weight (1.0 g) of the nucleating agent two (p-methyl dibenzylidene) sorbitol are mixed with each other, then added to a medium-speed mixer and stirred, and the stirring speed is 250 rpm / min, and the stirring and mixing time is 10 minutes. After the mixing is completed, the material is discharged, and the premixed material is immediately added to the Haake twin-screw extruder with a set temperature for melt mixing, extrusion and granulation. The set temperature of t...

Embodiment 2

[0044] 100 parts by weight (2000 grams) of propylene polymer powder (ethylene-propylene random copolymer, ethylene copolymerization amount 8wt%) is added in the high-speed mixer, and 8 parts by weight of ethylene-propylene rubber, 0.1 parts by weight (2 Gram) primary antioxidant tetrakis [beta-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 0.2 parts by weight (4 grams) of pentaerythritol bisphosphite bis(2,4 - Ditert-butylphenyl) ester, 0.1 parts by weight (2 grams) of halogen absorbent (calcium stearate), 1.3 parts by weight (26 grams) of diisopropyl hydroperoxide, 1.5 parts by weight (30 grams) The auxiliary cross-linking agent trimethylol propane trimethyl propylene and the nucleating agent bis (p-ethyl dibenzylidene) sorbitol of 0.1 parts by weight (3 grams) are mixed with each other, and then added to a medium-speed mixer and stirred and mixed , the stirring speed is 250 rpm, and the mixing time is 10 minutes. After the mixing is completed, the ma...

Embodiment 3

[0047] 100 parts by weight (2000 grams) of propylene-ethylene random copolymer powder (ethylene copolymerization amount 5wt%) is added in the high-speed mixer, and 20 parts by weight (400 grams) of EPDM rubber, 0.1 parts by weight ( 2.0 grams) primary antioxidant β-(4-hydroxyl-3,5-di-tert-butylphenyl) n-octadecyl propionate, 0.2 parts by weight (4.0 grams) of (2,4-di-tert-butyl phenyl) phosphite triester, 0.1 parts by weight (2.0 grams) of halogen absorbent (zinc stearate), 2.5 parts by weight (50 grams) of di-tert-butyl peroxide, 0.05 parts by weight (1.0 grams) of Auxiliary cross-linking agent ester triallyl cyanurate and 0.5 parts by weight (10 grams) of nucleating agent two (3,4-dimethyl dibenzylidene) sorbitol are mixed mutually, add to medium speed Stir and mix in a mixer, the stirring speed is 250 rpm, and the stirring and mixing time is 10 minutes. After the mixing is completed, the material is discharged, and the premixed material is immediately added to the Haake tw...

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Abstract

The invention discloses a preparation method for a transparent polypropylene composition with low-temperature impact resistance, belonging to the field of new material technology. The preparation method comprises the following steps: uniformly mixing all the pre-dried components of the polypropylene composition in a high-speed mixer; then adding a mixture obtained in the previous step into a twin-screw extruder for melt extrusion at 160 to 250 DEG C; rapidly pulling an extruded material strip by using a tractor, wherein a drawing ratio is 2 to 40 in terms of the ratio of the cross-sectional areas of a die and a filament, and a water cooling manner is employed for cooling; and baking an extruded object in a baking oven. The polypropylene composition has high rigidity, high low-temperature toughness and good transparency.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a transparent low-temperature impact-resistant propylene polymer composition and a preparation method thereof. Background technique [0002] The excellent transparency and surface gloss of transparent PP are comparable to typical transparent materials such as polycarbonate, polyester (PET), polystyrene, etc., so it can be widely used in household goods and packaging fields. The heat resistance of transparent PP is higher than that of general-purpose PP, and it is especially suitable for appliances that require high transparency and are used or sterilized at high temperatures, such as medical syringes, microwave oven cookers, baby bottles, disposable fast food utensils, etc. With the rapid development of my country's PP industry, transparent PP has become one of the fastest growing varieties of PP products. [0003] There are generally three ways to improve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/08C08L23/16C08L53/02C08K5/134C08K5/526C08K5/098C08K5/14C08K5/3492C08K5/103C08K5/3415
Inventor 左胜武袁小亮邱敦瑞徐振明傅勇王晶
Owner SINOPEC YANGZI PETROCHEM