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Ternary Elastomeric Copolymer Comprising Diene And Method For Preparing Same

A copolymer and elastic technology, applied in the field of tertiary elastic copolymer and its preparation, can solve the problems of uneven distribution of repeating units, difficulty in obtaining ternary elastic copolymer, etc.

Active Publication Date: 2014-12-31
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if the three monomers are copolymerized using such a conventional Group IV transition metal catalyst, there will be α-olefins derived from each monomer in the copolymer chain due to the high reactivity of the comonomer. Disadvantages of uneven distribution of repeat units
As a result, it is difficult to obtain terpolymers such as EPDM rubber with excellent elasticity and flexibility

Method used

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  • Ternary Elastomeric Copolymer Comprising Diene And Method For Preparing Same
  • Ternary Elastomeric Copolymer Comprising Diene And Method For Preparing Same
  • Ternary Elastomeric Copolymer Comprising Diene And Method For Preparing Same

Examples

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Embodiment 1 to 7

[0136] Preparation of tertiary elastic copolymers of ethylene, propylene and 5-ethylene-2-norbornene

[0137] The terpolymerization reaction of ethylene, propylene and 5-ethylene-2-norbornene was continuously carried out using a 2L pressure reactor. Hexane was continuously fed as a polymerization solvent from the lower part of the reactor at a supply rate of 6.7 kg per hour, and the polymerization solution was continuously withdrawn from the upper part of the reactor.

[0138] The [(1,2,3,4-tetrahydroquinolin-8-yl)tetramethylcyclopentadiene-η5,κ-N]dimethyltitanium and [(2-methylindole- 7-yl)tetramethylcyclopentadiene-η5,κ-N]dimethyltitanium was used as the first and second transition metal compounds in a state of being dissolved in hexane, and was added at a rate of 24 to 60 μmol per hour reactor. Also, N,N-dimethylaniline tetrakis(pentafluorophenyl)borate is used as a cocatalyst compound in a state of being dissolved in toluene, and is fed into the reactor at a rate of 105...

Embodiment 8 to 13

[0169] Preparation of tertiary elastic copolymers of ethylene, propylene and 5-ethylene-2-norbornene

[0170] The terpolymerization reaction of ethylene, propylene and 5-ethylene-2-norbornene was continuously carried out using a 2L pressure reactor. Hexane was continuously fed as a polymerization solvent from the lower part of the reactor at a supply rate of 7.6 kg per hour, and the polymerization solution was continuously withdrawn from the upper part of the reactor.

[0171] The [(1,2,3,4-tetrahydroquinolin-8-yl)tetramethylcyclopentadiene-η5,κ-N]dimethyltitanium and [(2-methylindole- 7-yl)tetramethylcyclopentadiene-η5,κ-N]dimethyltitanium was used as the first and second transition metal compounds in a state of being dissolved in hexane, and was added at a rate of 51 to 54 μmol per hour reactor. Also, N,N-dimethylaniline tetrakis(pentafluorophenyl)borate was used as a cocatalyst compound in a state of being dissolved in toluene, and was fed into the reactor at a rate of 2...

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Abstract

The present invention relates to a ternary elastomeric copolymer having a long-chain branch, obtained in the presence of a group IV transition metal catalyst, and capable of achieving both excellent processability and excellent elasticity (flexibility), and a method for preparing the same. The ternary elastomeric copolymer is a copolymer of 40-70% by weight of ethylene, an 15-55% by weight of alpha-olefin having 3 to 20 carbon atoms, and a 0.5-20% by weight of diene, and i) has a weight average molecular weight of 100,000 to 500,000, measured by GPC; and ii) is characterized in that the Mooney viscosity ML and a Mooney relaxation area MLR measured by a Mooney viscometer(1+4+2@125 DEG C) can satisfy a specific relationship.

Description

technical field [0001] The invention relates to a tertiary elastic copolymer and a preparation method thereof. The tertiary elastic copolymer is a copolymer of ethylene, alpha-olefin and diene. In more detail, the present invention relates to an elastic terpolymer capable of simultaneously having processability and elasticity (softness) and a method for preparing the same. Background technique [0002] EPDM rubber is a tertiary elastic copolymer of α-olefins such as ethylene and propylene and dienes such as ethylene-containing norbornene. It has a molecular structure without unsaturated bonds on the main chain, and has weather resistance and chemical resistance. and heat resistance and other characteristics superior to conventional conjugated dienes. Due to this feature, the EPDM rubber-based ternary elastic copolymer is widely used in various automotive parts materials, wire materials, construction, and various industrial materials such as hoses, gaskets, conveyor belts, b...

Claims

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Application Information

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IPC IPC(8): C08F210/18C08F4/646
Inventor 尹性澈朴成浩高凖锡崔洙荣
Owner LG CHEM LTD