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A heat-resistant, high-rigid, high-toughness transparent thermoforming polypropylene material and its preparation process

A polypropylene material and high-toughness technology, which is applied in the field of heat-resistant, high-rigidity, high-toughness, transparent thermoforming polypropylene materials and their preparation technology, can solve the problem of large fluctuations in the transparency of water cups, unstable product quality, and insufficient heat resistance. problem, to achieve the effect of increased crystallization temperature, good transparency, and reduced haze

Active Publication Date: 2018-10-02
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this will cause problems such as unstable product quality, large fluctuations in the transparency of the prepared water cup, uneven wall thickness, and insufficient heat resistance.

Method used

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  • A heat-resistant, high-rigid, high-toughness transparent thermoforming polypropylene material and its preparation process
  • A heat-resistant, high-rigid, high-toughness transparent thermoforming polypropylene material and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Propylene, ethylene, catalyst and external electron donor triethylaluminum are added to the pre-contact tank, the amount of propylene added is 99.0%, the amount of ethylene added is 1.0%, the flow rate of catalyst DQC-401 is 0.8-1.0kg / h, the flow rate of triethylaluminum The flow ratio of propylene / propylene is 0.16 kg / kg, and the flow ratio of triethylaluminum / Donor D is 5 kg / kg. In the polymerization reaction, the loop reaction temperature is 70±1°C, the reaction pressure is 3.7-4.0MPa, the amount of hydrogen added in the first loop is 0.04-0.06%, the amount of hydrogen added in the second loop is 0.50-0.55%, and the ethylene concentration is 1.0%. , through polymerization to obtain random copolymerized polypropylene powder with melt flow rate controlled at 2.8 g / 10min, then add 0.05% of primary antioxidant, 0.1% of auxiliary antioxidant, 0.05% of acid absorbing agent, and 0.01% of nucleating agent The premix of the four additives is extruded and granulated, the granu...

Embodiment 2

[0027] Propylene, ethylene, catalyst and external electron donor triethylaluminum are added to the pre-contact tank, the amount of propylene added is 98.8%, the amount of ethylene added is 1.2%, the flow rate of catalyst DQC-401 is 0.8-1.0kg / h, the flow rate of triethylaluminum The flow ratio of propylene / propylene is 0.16 kg / kg, and the flow ratio of triethylaluminum / Donor D is 5 kg / kg. In the polymerization reaction, the loop reaction temperature is 70±1°C, the reaction pressure is 3.7-4.0MPa, the amount of hydrogen added in the first loop is 0.04-0.06%, the amount of hydrogen added in the second loop is 0.50-0.55%, and the ethylene concentration is 1.2%. , through polymerization to obtain random copolymerized polypropylene powder with melt flow rate controlled at 3.0g / 10min, then add 0.05% of primary antioxidant, 0.1% of auxiliary antioxidant, 0.05% of acid absorbing agent, and 0.02% of nucleating agent The premix of the four additives was extruded and granulated, the granu...

Embodiment 3

[0029]Propylene, ethylene, catalyst and external electron donor triethylaluminum are added to the pre-contact tank, the amount of propylene added is 99.0%, the amount of ethylene added is 1.0%, the flow rate of catalyst DQC-401 is 0.8-1.0kg / h, the flow rate of triethylaluminum The flow ratio of propylene / propylene is 0.16 kg / kg, and the flow ratio of triethylaluminum / Donor D is 5 kg / kg. In the polymerization reaction, the loop reaction temperature is 70±1°C, the reaction pressure is 3.7-4.0MPa, the amount of hydrogen added in the first loop is 0.04-0.06%, the amount of hydrogen added in the second loop is 0.50-0.55%, and the ethylene concentration is 1.0%. , through polymerization to obtain a random copolymerized polypropylene powder with a melt flow rate controlled at 2.8g / 10min, and then add 0.05% of the main antioxidant, 0.1% of the auxiliary antioxidant, 0.05% of the acid absorbing agent, and 0.03% of the nucleating agent The premix of the four additives was extruded and g...

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Abstract

The invention discloses a heat-proof high-rigidity high-toughness transparent thermal-forming polypropylene material and a preparation process thereof. Under the existence of a catalyst and an external electron donor, propylene and ethylene are polymerized in a double-annular-pipe reactor, the temperature of the double-annular-pipe reactor is controlled to be 70+ / -1 DEG C in reaction, the reaction pressure is 3.7-4.0 MPa, the addition amount of propylene is 98-99.6%, the addition amount of ethylene is 0.4-2.0%, the addition amount of hydrogen in a first annular pipe is 0.04-0.06%, the addition amount of hydrogen of a second annular pipe is 0.50-0.55%, polypropylene powder with the ethylene linkage amount of 0.4-2.0% and the melt flow rate of 2.5-3.5 g / 10 min is obtained, main antioxidant, auxiliary antioxidant, acid acceptor and nucleating agent are added to be mixed, and extruding and granulating are conducted to obtain the heat-proof high-rigidity high-toughness transparent thermal-forming polypropylene material. The polypropylene material is appropriate in mobility, good in transparency, free of yellowing and odor, high in heat-proof performance, good in rigidity and toughness balance and capable of being rapidly formed.

Description

technical field [0001] The invention relates to a polypropylene material and a preparation process thereof, in particular to a heat-resistant, high-rigidity and high-toughness transparent thermoforming polypropylene material and a preparation process thereof. Background technique [0002] Thermoforming is a molding method in which the heated plastic sheet is brought close to the surface of the mold by pressure to obtain a shape similar to the surface. After cooling and setting, it is trimmed to form a finished product. Thermoforming products mainly include disposable lunch boxes, water cups, plates, trays, milk and yogurt cups, jelly cups, stationery, auto parts, electrical housings, seats, etc. With the increasing market of thermoforming products, the demand for thermoforming special materials is also increasing. At present, the raw materials for thermoforming include polystyrene (PS), ethylene terephthalate (PET), polychlorinated Second Vinyl (PVC) and Polypropylene (PP)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08K5/134C08K5/526C08K5/098C08F210/16C08F210/02C08F210/06
CPCC08F210/06C08F210/16C08K5/098C08K5/1345C08K5/526C08L2201/08C08L2201/10C08L2205/24C08L2207/14C08F210/02C08L23/14
Inventor 易志勤蔡伟张玮梁平柯君豪陈仕兵
Owner CHINA PETROLEUM & CHEM CORP