High-flow high-impact transparent polypropylene material produced by adopting hydrogen regulation method and method of high-flow high-impact transparent polypropylene material

A transparent polypropylene, high-flow technology, applied in the field of polypropylene materials, can solve the problems of product quality fluctuation, unplanned shutdown of equipment, vibration, etc., and achieve the effect of improving production efficiency, reducing processing energy consumption, and good rigidity and toughness balance

Active Publication Date: 2015-01-28
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: ① it is necessary to add peroxide, which increases the production cost; ② because the uniformity of peroxide addition is not easy to control, the product performance fluctuates greatly; Yellow and other adverse consequences
[0005] 1. Causes a large vibration in the axial flow operation of the reactor, affecting the stable rotation of the device
[0006] 2. High-concentration hydrogen has higher requirements on the reaction of the loop pipe, and if the control is not good, cavitation of the circulating pump may easily occur, resulting in unplanned shutdown of the device
[0007] 3. The production of polymers with high ethylene content and high melt index under high hydrogen concentration and high ethylene content will easily produce a large amount of random copolymers, resulting in high product viscosity, which will easily cause blockage of the downstream discharge system and make the final product Quality fluctuates

Method used

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  • High-flow high-impact transparent polypropylene material produced by adopting hydrogen regulation method and method of high-flow high-impact transparent polypropylene material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Use propylene and ethylene as raw materials, the ratio of propylene and ethylene is 97:3, put them into the loop reactor, add catalyst, electron donor and antistatic agent, stir evenly, and carry out the reaction. Among them, the amount of DQC-401 catalyst added is 0.8kg / h, the ratio of triethylaluminum flow / propylene flow is 0.16kg / kg, and the ratio of triethylaluminum flow / Donor is 5 kg / kg, the loop reaction temperature is 70 ± 1°C, the reaction pressure is 3.7MPa, and the loop control hydrogen concentration is 0.41 %, polymerized to obtain a weight average molecular weight of 186477, a molecular weight distribution of 5.79, and a melt flow rate controlled at 36.6 g / 10min random copolymerized polypropylene powder.

[0032] (2) Based on the total weight of random copolymerized polypropylene powder, take antioxidant 0.15% , acid absorbent 0.05% , lubricant 0.05%, transparent agent 0.2% Mixed and granulated by extrusion to form a granular composition as a premix....

Embodiment 2

[0034] (1) Use propylene and ethylene as raw materials, the ratio of propylene and ethylene is 96:4, put them into the loop reactor, add catalyst, electron donor and antistatic agent, stir evenly, and carry out the reaction. Among them, the amount of DQC-401 catalyst added is 1.0kg / h, the ratio of triethylaluminum flow / propylene flow is 0.16kg / kg, and the ratio of triethylaluminum flow / Donor is 5kg / kg, the loop reaction temperature is 70 ± 1°C, the reaction pressure is 4.0MPa, and the loop control hydrogen concentration is 0.43 %, polymerized to obtain a weight average molecular weight of 183731, a molecular weight distribution of 6.03, and a melt flow rate controlled at 38.0 g / 10min random copolymerized polypropylene powder.

[0035] (2) Based on the total weight of random copolymerized polypropylene powder, take antioxidant 0.15% , acid absorbent 0.05% , lubricant 0.05%, transparent agent 0.2% Mixed and granulated by extrusion to form a granular composition as a premix. ...

Embodiment 3

[0037] (1) Use propylene and ethylene as raw materials, the ratio of propylene and ethylene is 96.5:3.5, put them into the loop reactor, add catalyst, electron donor and antistatic agent, stir evenly, and react. Among them, the amount of DQC-401 catalyst added is 0.9kg / h, the ratio of triethylaluminum flow / propylene flow is 0.16kg / kg, and the ratio of triethylaluminum flow / Donor is 5 kg / kg, loop reaction temperature 70 ± 1°C, reaction pressure 3.8 MPa, the loop control hydrogen concentration is 0.45 %, polymerized to obtain random copolymerized polypropylene powder with a weight average molecular weight of 181993, a molecular weight distribution of 5.91, and a melt flow rate controlled at 40.1g / 10min.

[0038] (2) Based on the total weight of random copolymerized polypropylene powder, take antioxidant 0.15% , acid absorbent 0.05% , lubricant 0.05%, transparent agent 0.2% Mixed and granulated by extrusion to form a granular composition as a premix. The premix is ​​added to...

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Abstract

The invention discloses a high-flow high-impact transparent polypropylene material produced by adopting a hydrogen regulation method. The ethylene content is 3.0-4.0%, the melt flow rate is larger than or equal to 35g / 10min, the haze is less than 9%, and the notch impact strength of a simply supported beam is 6.0-6.5KJ / m<2>. The invention also discloses a method for producing the high-flow high-impact transparent polypropylene material by adopting the hydrogen regulation method. The polypropylene material is high in transparency, good in glossiness, non-yellowed, odor-free and good in impact and can be used for replacing high-flow high-impact transparent polypropylene produced by a degradation method.

Description

technical field [0001] The invention relates to a polypropylene material, in particular to a high-fluidity and high-impact transparent polypropylene material produced by a hydrogen adjustment method. The invention also relates to a method for producing a high-flow, high-impact transparent polypropylene material produced by a hydrogen adjustment method. Background technique [0002] With the advancement of molding equipment and technology, transparent random copolymer polypropylene products (MFR≥35g / 10min) with higher fluidity have become a new demand in the market. High-flow high-impact transparent polypropylene can reduce the processing temperature and injection pressure during the product processing and production process, and the mold filling speed is fast, thereby reducing energy consumption, shortening the production cycle, and increasing output; at the same time, it can reduce the wall thickness of the product and reduce Product warpage and scrap rate, more suitable f...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K5/098C08K5/103C08K5/526C08F210/06C08F210/02C08F2/00B29B9/06
CPCC08F210/06C08F210/16C08K5/098C08K5/103C08K5/526C08K13/02C08L2201/10C08L23/14C08F210/02C08F2500/01C08F2500/12
Inventor 易志勤梁胜彪郑士录梁平张玮李伟陈仕兵黄艳芳姜武会梁志斌张飘凌
Owner CHINA PETROLEUM & CHEM CORP
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