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Ethylene-propylene copolymer elastomer and preparation method thereof

A technology based on propylene and elastomers, which is applied in the field of polymer compound preparation, and can solve problems such as the inability to obtain metallocene catalysts, reduced crystallinity of polymers, and easy stickiness

Inactive Publication Date: 2019-11-15
SHANDONG ORIENT HONGYE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the technical blockade of metallocene catalysts in the world, metallocene catalysts cannot be obtained in China, so it is impossible to use the same production method as ExxonMobil Chemical Company to produce PBE
[0007] The addition of ethylene leads to a decrease in the crystallinity of the polymer, and reduces the melting temperature of the polymer. The lower melting temperature and softening temperature make the polymer prone to stickiness in the range of 60-105 ° C. The traditional polypropylene copolymerization production temperature is just right. In this temperature range, such polymers cannot be produced by polymerization using conventional methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Take the following raw materials by weight:

[0049] Liquid phase propylene 800kg, dispersant polyvinyl alcohol 50kg, initiator dicyclohexyl peroxydicarbonate 45kg, accelerator D8kg, antioxidant A 4kg, zinc oxide 40kg, stearic acid 18kg, water 1200kg, catalyst vanadium trichloride - Diisobutylaluminum chloride 4 g, and a sufficient amount of ethylene gas.

[0050] The steps for preparing ethylene-propylene-based copolymerized elastomers are as follows:

[0051] (1) Add the above-mentioned initiator, water, dispersant, accelerator, anti-aging agent, zinc oxide, stearic acid, and catalyst into the polymerization kettle from the bottom in sequence, stir and mix, vacuumize, fill with nitrogen and exhaust oxygen.

[0052] (2) Add propylene in liquid phase to the polymerization kettle, feed ethylene gas, continue to feed ethylene during the whole polymerization process, raise the temperature to 45-65°C to carry out polymerization reaction, keep the pressure at 0.8-2.0Mpa, an...

Embodiment 2

[0057] Take the following raw materials by weight:

[0058] Liquid phase propylene 1000kg, dispersant polyvinyl alcohol 70kg, initiator dicyclohexyl peroxydicarbonate 50kg, accelerator D10kg, antioxidant A 5kg, zinc oxide 50kg, stearic acid 20kg, water 1500kg, catalyst vanadium trichloride - 5 g of diisobutylaluminum chloride, and a sufficient amount of ethylene gas.

[0059] The steps for preparing ethylene-propylene-based copolymerized elastomers are as follows:

[0060] (1) Add the above-mentioned initiator, water, dispersant, accelerator, anti-aging agent, zinc oxide, stearic acid, and catalyst into the polymerization kettle from the bottom in sequence, stir and mix, vacuumize, fill with nitrogen and exhaust oxygen.

[0061] (2) Add propylene in liquid phase to the polymerization kettle, feed ethylene gas, continue to feed ethylene during the whole polymerization process, raise the temperature to 45-65°C to carry out polymerization reaction, keep the pressure at 0.8-2.0Mp...

Embodiment 3

[0066] Take the following raw materials by weight:

[0067] Liquid phase propylene 1200kg, dispersant polyvinyl alcohol 90kg, initiator dicyclohexyl peroxydicarbonate 55kg, accelerator D12kg, antioxidant A 6kg, zinc oxide 60kg, stearic acid 22kg, water 2000kg, catalyst vanadium trichloride - Diisobutylaluminum chloride 6g, and a sufficient amount of ethylene gas.

[0068] The steps for preparing ethylene-propylene-based copolymerized elastomers are as follows:

[0069] (1) Add the above-mentioned initiator, water, dispersant, accelerator, anti-aging agent, zinc oxide, stearic acid, and catalyst into the polymerization kettle from the bottom in sequence, stir and mix, vacuumize, fill with nitrogen and exhaust oxygen.

[0070] (2) Add propylene in liquid phase to the polymerization kettle, feed ethylene gas, continue to feed ethylene during the whole polymerization process, raise the temperature to 45-65°C to carry out polymerization reaction, keep the pressure at 0.8-2.0Mpa, a...

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Abstract

The invention discloses an ethylene-propylene copolymer elastomer. The elastomer is prepared from the following raw materials in parts by weight: 80-120 parts of liquid-phase propylene, 5-9 parts of adispersant, 4.5-5.5 parts of an initiator, 0.8-1.2 parts of an accelerator, 0.4-0.6 part of an anti-aging agent, 4-6 parts of zinc oxide, 1.8-2.2 parts of stearic acid, 120-200 parts of water and sufficient ethylene gas. The invention also provides a preparation method of the elastomer. The elastomer is prepared by copolymerizing ethylene and liquid-phase propylene at a temperature of 45-65 DEG Cunder catalysis of a Ziegler Natta catalyst, and the purpose of producing the elastomer without using an Exxpol metallocene catalyst is achieved.

Description

technical field [0001] The invention belongs to the technical field of polymer compound preparation, and in particular relates to an ethylene-propylene copolymerized elastomer and a preparation method thereof. Background technique [0002] At the end of 2008, ExxonMobil Chemical Company of the United States launched propylene-based elastomers (PBE), which are special olefin elastomers manufactured using the Exxpol metallocene catalyst patented technology of ExxonMobil Chemical Company, with excellent elasticity , softness, toughness, flexibility, transparency and other characteristics, good compatibility with polyolefin, easy processing, known as "PP metallocene". Its birth has brought infinite inspiration, innovation opportunities and market value to the field of plastic products. After entering the Chinese market, it has been widely used soon. In 2013, the volume entering the domestic market was about 20,000 / ton. It is widely used in the production of non-woven fabrics,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F210/06C08F2/18C08F2/16C08F4/68
CPCC08F210/16C08F210/06C08F2/18C08F2/20C08F4/68
Inventor 张瑶瑶刘路路毕新平王友健
Owner SHANDONG ORIENT HONGYE CHEM