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ETHYLENE/alpha-OLEFIN/NON-CONJUGATED POLYENE COPOLYMER, PRODUCTION METHOD THEREFOR, AND USE

A non-conjugated polyene and manufacturing method technology, applied in transportation and packaging, special tires, tire parts, etc., can solve problems such as insufficient processability, reduced crosslink density, stickiness, etc., and achieve excellent curing properties , Prevent phase separation, excellent balance of physical properties

Active Publication Date: 2020-10-30
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, the molecular weight distribution (Mw / Mn) of the ethylene-α-olefin-non-conjugated polyene copolymer obtained from Patent Document 7 is as narrow as about 2, so processability and the like are not necessarily sufficient.
It should be noted that conventional EPDM polymers containing a large amount of low-molecular-weight components have problems such as low crosslink density and stickiness.

Method used

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  • ETHYLENE/alpha-OLEFIN/NON-CONJUGATED POLYENE COPOLYMER, PRODUCTION METHOD THEREFOR, AND USE
  • ETHYLENE/alpha-OLEFIN/NON-CONJUGATED POLYENE COPOLYMER, PRODUCTION METHOD THEREFOR, AND USE
  • ETHYLENE/alpha-OLEFIN/NON-CONJUGATED POLYENE COPOLYMER, PRODUCTION METHOD THEREFOR, AND USE

Examples

Experimental program
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Effect test

Embodiment 1

[0762] use figure 1 The continuous polymerization apparatus shown was operated as follows to produce an ethylene-propylene-VNB copolymer.

[0763] In the polymerization reactor C with a volume of 300 liters, the dehydrated and refined hexane solvent was continuously supplied from the pipe 6 at 58.3 L / hr, and the triisobutylaluminum (TiBA) was continuously supplied from the pipe 7 at 4.5 mmol / hr. 0.150mmol / hr continuous supply (C 6 h 5 ) 3 CB(C 6 f 5 ) 4 , Bis(p-tolyl)methylene(cyclopentadienyl)(octamethyloctahydrodibenzofluorenyl)zirconium dichloride was continuously supplied at 0.030 mmol / hr. At the same time, into the polymerization reactor C, ethylene was continuously supplied at 6.6 kg / hr, propylene was continuously supplied at 9.3 kg / hr, hydrogen was continuously supplied at 18 liters / hr, and 340 g / hr of VNB was continuously supplied, and copolymerization was carried out under the conditions of a polymerization temperature of 87° C., a total pressure of 1.6 MPaG, a...

Embodiment 2～4

[0777] Except having changed the production conditions of the ethylene-propylene-VNB copolymer to the conditions shown in Table 1, it carried out similarly to Example 1, and produced the ethylene-propylene-VNB copolymer. The production results are shown in Table 1. In addition, the physical properties of the obtained ethylene-propylene-VNB copolymer were evaluated in the same manner as in Example 1. The results are shown in Table 2. In addition, the molecular weight distribution of the obtained ethylene-propylene-VNB copolymer showed bimodality.

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Abstract

The present invention addresses the problem of providing a novel ethylene / alpha-olefin / non-conjugated polyene copolymer which contains a specific non-conjugated polyene, e.g., VNB, as a comonomer ingredient and has a low long-chain branch content and which, when crosslinked with a peroxide, has excellent curability and satisfactory processability. The ethylene / alpha-olefin / non-conjugated polyene copolymer according to the present invention is characterized by comprising constituent units derived from ethylene (A), a C3-20 alpha-olefin (B), and a non-conjugated polyene (C) including two or morepartial structures in total in the molecule which are selected from the group consisting of those of general formulae (I) and (II), and by satisfying specific requirements.

Description

technical field [0001] The present invention relates to a novel ethylene-α-olefin-non-conjugated polyene copolymer, its production method and use. Background technique [0002] Ethylene-α-olefin rubber represented by ethylene-propylene-non-conjugated diene copolymer rubber (EPDM) has no unsaturated bonds in the main chain of its molecular structure, so it is different from the general-purpose conjugated diene system. Compared with rubber, it has excellent heat resistance and weather resistance, so it is widely used in automotive parts, electric wire materials, construction and civil engineering materials, industrial material parts, and modified materials of various resins. [0003] It is known that in the case of crosslinking ethylene-α-olefin-based rubber using peroxides, especially non-conjugated When polyene is used as a copolymerization component, the crosslinking speed is fast. [0004] However, ethylene-α-olefin-VNB terpolymers produced using conventional catalysts h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/18C08F4/6592C08L9/06C08L23/16
CPCC08F210/18C08L23/16C08F4/65908C08F4/65912B60C1/00C08L23/083C08K2201/006C08L9/06C08F4/65927C08F210/06C08F236/20C08F2500/04C08F2500/05C08F2500/17C08F2500/09C08F2500/21C08F2500/27C08K5/098C08K3/36C08K5/5419C08K5/14C08F4/65916C08F2/38C08F2/44C08K5/54B60C1/0008B60C1/0016B60C1/0025B60C2001/005C08F4/6592
Inventor 市野光太郎菊地义治宍户启介田中润平有野恭巨
Owner MITSUI CHEM INC
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