Impact-resistance and low temperature-resistance transparent polypropylene composition and preparation method for transparent polypropylene composition
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A technology of transparent polypropylene and low temperature resistance, which is applied in low temperature resistant transparent polypropylene composition and its preparation. It has the field of impact resistance and translucent impact resistance. It can solve the problems of difficult proportioning and achieve good low temperature impact resistance. Effect
Inactive Publication Date: 2012-07-18
MIANYANG HONGQI NEW MATERIAL SCI & TECH
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Problems solved by technology
For example, the modified polypropylene used in high-speed rail battery tanks and some display panels of submarines has low temperature resistance, aging resistance, flame retardancy and translucency, especiall
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Embodiment 1
[0017] Example 1: 75% of polypropylene, 10% of melamine polyphosphate, 14.7% of polyethylene octene co-elastomer, 0.2% of 2,6-di-tert-butyl p-cresol, (p-toluene Base) Sorbitol 0.1%, add to the mixer and stir evenly, then extrude and granulate with a twin-screw extruder, the granulation temperature is controlled as 180-205°C in the first section of the twin-screw extruder, and 205-205°C in the second to third sections 225°C, the fourth to ninth sections are 210-215°C, and the temperature of the head is 200-220°C. The flame retardant grade of the propylene composition obtained in this example is V2, the oxygen index is 27, the low temperature resistance effect does not break in the falling ball impact test at minus 40°C, the melt index is 11g / 10min, and the tensile strength reaches 18MPa. The elongation reaches 302%, the bending strength reaches 20MPa, and the heat distortion temperature is 70°C without affecting its transparency and aging resistance.
Embodiment 2
[0018] Example 2: 85% polypropylene, 5% tris(1-oxo-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octanemethylene-4) phosphate, Ethylene-vinyl acetate copolymer 9.5%, 1,3,5, tris(3,5-di-tert-butyl,4-hydroxybenzyl)-s-triazine, 2,4,6-(1H,3H,5H) Triketone 0.3%, 1,3:2,4-bis(3,4-dimethylbenzylidene)-D-sorbitol 0.2%, add to the mixer and stir evenly, then extrude with twin-screw extruder to produce Granulation, the granulation temperature is controlled as 180-205°C in the first section of the twin-screw extruder, 205-225°C in the second to third sections, 210-215°C in the fourth to ninth sections, and 200-220°C at the head.
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Abstract
The invention relates to a polypropylene modified material, in particular to a impact-resistance and low temperature-resistance semi-transparent polypropylene composition and a preparation method for the semi-transparent polypropylene composition. The impact-resistance and low temperature-resistance semi-transparent polypropylene composition comprises the following components in weight percent: 75-85 percent of polypropylene, 5-10 percent of fire retardant, 5-15 percent of toughening agent, 0.1-0.5 percent of antioxygen and 0.1-0.3 percent of core transparent agent. The preparation method comprises the following steps of: adding to a mixing machine in proportion and evenly mixing; then, performing extruding granulation by using a twin-screw extruder, wherein the extruding granulation temperature is controlled to be 180-225 DEG C. The modified polypropylene has the advantages of low temperature resistance, ageing resistance, flame resistance and semitransparency, especially has very high low-temperature impact resistance and is capable of meeting the functional requirements of display panels of high-iron storage battery slot bodies and submarines. Meanwhile, the impact-resistance and low temperature-resistance semi-transparent polypropylene composition can be widely applied to the field of aviation, aerospace, electronics, military project and the like.
Description
technical field [0001] The invention relates to a modified polypropylene material, in particular to an impact-resistant, semi-transparent impact-resistant, low-temperature-resistant transparent polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene is an engineering plastic with excellent comprehensive properties. It has low density, good strength, stiffness, hardness, heat resistance, and fluidity. It has good electrical properties and high-frequency insulation and is not affected by humidity. It is widely used in automobiles, Electronics, home appliances, construction and other industries. Polypropylene material has a low heat distortion temperature (100°C), low transparency, low gloss, and low rigidity, but its application is limited due to its low modulus, heat resistance, and poor impact strength. In many polypropylene applications are modified polypropylene. At present, the modification of polypropylene is mainly divid...
Claims
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Application Information
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