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Ethylene/1-butene copolymer having excellent processability

A technology of butene copolymer and butene copolymerization is applied in the field of ethylene/1-butene copolymer, which can solve the problems of deterioration of long-term pressure resistance, deterioration of brittle fracture mode resistance, and inability to satisfy physical properties and processability of products at the same time. , to achieve the effect of improving processability and excellent stress cracking resistance

Active Publication Date: 2020-08-07
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pipes usually have to secure long-term pressure stability for at least 50 years, but there are disadvantages that if the density is high, resistance to brittle fracture modes deteriorates and long-term pressure characteristics deteriorate
However, there is a problem that the physical properties and processability of the product cannot be satisfied at the same time

Method used

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  • Ethylene/1-butene copolymer having excellent processability
  • Ethylene/1-butene copolymer having excellent processability
  • Ethylene/1-butene copolymer having excellent processability

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0117] The preparation example of the first metallocene compound

[0118] Synthetic Example 1: [(tBu-O-(CH 2 ) 6 )(CH 3 )Si(C 5 (CH 3 ) 4 )(tBu-N)TiCl 2 ] preparation

[0119] 50 g of Mg was put into a 10 L reactor at room temperature, and then 300 mL of THF was added thereto. Add about 0.5g of I 2 Afterwards, the reactor temperature was maintained at 50 °C. After the reactor temperature was stabilized, 250 g of 6-tert-butoxyhexyl chloride was added to the reactor at a rate of 5 mL / min using a feed pump. An increase in reactor temperature of approximately 4°C to 5°C was observed with the addition of 6-tert-butoxyhexyl chloride. 6-tert-butoxyhexyl chloride was added continuously with stirring over 12 hours. After reacting for 12 hours, a black reaction solution was obtained. After sampling 2 mL of the resulting black solution, water was added thereto to obtain an organic layer. Therefore, by 1 H-NMR identified 6-tert-butoxyhexane. 6-tert-butoxyhexane in...

preparation Embodiment 1

[0138] 3.0 kg of toluene solution was put into a 20 L stainless steel (sus) high pressure reactor, and the temperature of the reactor was kept at 40°C. 500 g of silica (Grace Davison, SP2212) dehydrated under vacuum at 600° C. for 12 hours was added to the reactor and dispersed well. Then, 2.78 kg of a 10% by weight methylaluminoxane (MAO) / toluene solution was added, followed by stirring at 80° C. and 200 rpm for more than 15 hours.

[0139]The temperature of the reactor was lowered to 40° C., and then 200 g of a 7.8% by weight metallocene compound / toluene solution of Synthesis Example 1 was added to the reactor, followed by stirring at 200 rpm for 1 hour. Subsequently, 250 g of an 8.7% by weight metallocene compound / toluene solution of Synthesis Example 2 was added to the reactor, followed by stirring at 200 rpm for 1 hour.

[0140] 70 g of co-catalyst (anilinium tetrakis(pentafluorophenyl)borate) diluted in toluene was added to the reactor, followed by stirring at 200 rpm f...

preparation Embodiment 2

[0143] A supported catalyst was prepared in the same manner as in Preparation Example 1 except that 125 g of the metallocene compound / toluene solution of Synthesis Example 1 was added in Preparation Example 1.

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Abstract

The present invention relates to an ethylene / 1-butene copolymer having excellent processability and stress cracking resistance. The ethylene / 1-butene copolymer according to the present invention can be applied to a high pressure resistance heating tube, a PE-RT pipe, or a large-diameter pipe, and the like.

Description

technical field [0001] Cross References to Related Applications [0002] This application is based on and claims priority from Korean Patent Applications No. 10-2017-0177534 and No. 10-2018-0166741 filed on December 21, 2017 and December 20, 2018, respectively, the disclosure of which is hereby adopted This reference is incorporated herein in its entirety. [0003] The present invention relates to ethylene / 1-butene copolymers having excellent processability. Background technique [0004] Polyolefin resins used for large-diameter high-pressure pipes generally require high-pressure resistance characteristics and excellent processability. The high-pressure resistance property is a physical property generally expressed in a high-density region, because the higher the degree of crystallinity in polyolefin resin, the higher the modulus and the higher the strength to withstand high pressure. However, pipes generally have to secure long-term pressure stability for at least 50 ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F2/38C08F4/6592C08F4/659C08F4/646
CPCC08F2/38C08F210/16C08F4/65916C08F4/65912C08F2420/02C08F4/65908C08F2420/10C08F2420/07C08F4/65904C08F4/65925C08F4/6592C08F210/08C08F2500/12C08F2500/04C08F2500/10C08F2500/06C08F2500/13C08F4/6465C08L23/0815
Inventor 金重洙权赫柱崔二永李琪树朴种相洪大植李叡真郭晋盈
Owner LG CHEM LTD
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