JP2021161343A5 - - Google Patents
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- JP2021161343A5 JP2021161343A5 JP2020066906A JP2020066906A JP2021161343A5 JP 2021161343 A5 JP2021161343 A5 JP 2021161343A5 JP 2020066906 A JP2020066906 A JP 2020066906A JP 2020066906 A JP2020066906 A JP 2020066906A JP 2021161343 A5 JP2021161343 A5 JP 2021161343A5
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- structural units
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- ethylene
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 6
- 239000005977 Ethylene Substances 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 3
- 150000004291 polyenes Chemical class 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 229920001038 ethylene copolymer Polymers 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- RFFLAFLAYFXFSW-RHQRLBAQSA-N 1,2-dichloro-3,4,5,6-tetradeuteriobenzene Chemical compound [2H]C1=C([2H])C([2H])=C(Cl)C(Cl)=C1[2H] RFFLAFLAYFXFSW-RHQRLBAQSA-N 0.000 description 1
- 238000001460 carbon-13 nuclear magnetic resonance spectrum Methods 0.000 description 1
- UHOVQNZJYSORNB-MICDWDOJSA-N deuteriobenzene Chemical compound [2H]C1=CC=CC=C1 UHOVQNZJYSORNB-MICDWDOJSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Description
《要件(1)》
エチレン系共重合体(L)は、エチレン[A]に由来する構造単位と、炭素数4~20のα-オレフィン[B]に由来する構造単位とのモル比〔[A]/[B]〕が、40/60~90/10である。モル比が前記範囲にあるエチレン系共重合体(L)は、低温でのゴム弾性と常温での引張強度とのバランスに優れる。
[A]/[B]の下限は、好ましくは45/55、より好ましくは50/50、特に好ましくは55/45である。また、[A]/[B]の上限は、好ましくは80/20、より好ましくは75/25、さらに好ましくは70/30である。
《Requirements (1)》
The ethylene-based copolymer (L) has a molar ratio of structural units derived from ethylene [ A ] to structural units derived from an α-olefin [ B ] having 4 to 20 carbon atoms [[ A ]/[ B ]. ] is between 40/60 and 90/10. The ethylene-based copolymer (L) having a molar ratio within the above range has an excellent balance between rubber elasticity at low temperature and tensile strength at room temperature.
The lower limit of [ A ]/[ B ] is preferably 45/55, more preferably 50/50, and particularly preferably 55/45. Also, the upper limit of [ A ]/[ B ] is preferably 80/20, more preferably 75/25, still more preferably 70/30.
《要件(2)》
エチレン系共重合体(L)は、非共役ポリエン[C]に由来する構造単位の含有割合が、前記[A]に由来する構造単位、前記[B]に由来する構造単位および前記[C]に由来する構造単位の合計を100モル%として、0.1~6.0モル%である。この含有割合が前記範囲にあるエチレン系共重合体(L)は、充分な架橋性および柔軟性を有する。
前記[C]に由来する構造単位の含有割合の下限は、好ましくは0.5モル%である。前記[C]に由来する構造単位の含有割合の上限は、好ましくは4.0モル%、より好ましくは3.5モル%、さらに好ましくは3.0モル%である。
非共役ポリエン[C]に由来する構造単位の含有量が上記範囲にあると、充分な架橋性および柔軟性を有するエチレン系共重合体(L)が得られる。
《Requirement (2)》
In the ethylene copolymer (L), the content ratio of the structural units derived from the non-conjugated polyene [ C ] is the structural units derived from the [ A ], the structural units derived from the [ B ] and the [ C ]. It is 0.1 to 6.0 mol % when the total of structural units derived from is 100 mol %. The ethylene-based copolymer (L) having this content within the above range has sufficient crosslinkability and flexibility.
The lower limit of the content of structural units derived from [ C ] is preferably 0.5 mol%. The upper limit of the content of the structural unit derived from [ C ] is preferably 4.0 mol%, more preferably 3.5 mol%, still more preferably 3.0 mol%.
When the content of structural units derived from the non-conjugated polyene [C] is within the above range, an ethylene copolymer (L) having sufficient crosslinkability and flexibility can be obtained.
〈B値〉
o-ジクロロベンゼン-d4/ベンゼン-d6(4/1[v/v])を測定溶媒とし、測定温度120℃にて、13C-NMRスペクトル(100MHz、日本電子製ECX400P)を測定し、下記式(i)に基づき算出した。
B値=([EX]+2[Y])/〔2×[E]×([X]+[Y])〕・・・(i)
[ここで[E]、[X]および[Y]は、それぞれ、エチレン[A]、炭素数4~20のα-オレフィン[B]、および非共役ポリエン[C]に由来する構造単位のモル分率を示し、[EX]はエチレン[A]-炭素数4~20のα-オレフィン[B]ダイアッド連鎖分率を示す。]
<B value>
Using o-dichlorobenzene-d 4 /benzene-d 6 (4/1 [v/v]) as a measurement solvent, 13 C-NMR spectrum (100 MHz, JEOL ECX400P) was measured at a measurement temperature of 120°C. , calculated based on the following formula (i).
B value = ([EX] + 2 [Y]) / [2 x [E] x ([X] + [Y])] (i)
[wherein [E], [X] and [Y] are moles of structural units derived from ethylene [ A ], α-olefins having 4 to 20 carbon atoms [ B ], and non-conjugated polyenes [ C ], respectively [EX] indicates the ethylene [ A ]-C4-C20 α-olefin [ B ] diad chain fraction. ]
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020066906A JP7471129B2 (en) | 2020-04-02 | 2020-04-02 | Ethylene-based copolymer composition and its use |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020066906A JP7471129B2 (en) | 2020-04-02 | 2020-04-02 | Ethylene-based copolymer composition and its use |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2021161343A JP2021161343A (en) | 2021-10-11 |
JP2021161343A5 true JP2021161343A5 (en) | 2023-02-20 |
JP7471129B2 JP7471129B2 (en) | 2024-04-19 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2020066906A Active JP7471129B2 (en) | 2020-04-02 | 2020-04-02 | Ethylene-based copolymer composition and its use |
Country Status (1)
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JP (1) | JP7471129B2 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004500997A (en) | 2000-01-13 | 2004-01-15 | エクソンモービル・ケミカル・パテンツ・インク | Layered article containing a layer of ethylene-containing polymer elastomer containing resin |
JP2006266378A (en) | 2005-03-23 | 2006-10-05 | Mitsuboshi Belting Ltd | Power transmission belt |
JP2007092880A (en) | 2005-09-28 | 2007-04-12 | Mitsuboshi Belting Ltd | Transmission belt |
JP2009270583A (en) | 2006-08-22 | 2009-11-19 | Bando Chem Ind Ltd | Drive belt and conveyor belt |
JP5846752B2 (en) | 2011-03-31 | 2016-01-20 | 三井化学株式会社 | Ethylene copolymer, cross-linked ethylene copolymer, and molded article thereof |
WO2015122415A1 (en) | 2014-02-13 | 2015-08-20 | 三井化学株式会社 | Ethylene/α-olefin/non-conjugated polyene copolymer, use therefor, and manufacturing method therefor |
-
2020
- 2020-04-02 JP JP2020066906A patent/JP7471129B2/en active Active
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