Ethylene α-olefin non-conjugated polyene copolymer, use thereof, and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10919997-B2
Application number	US-201515116691-A
Country	US
Kind code	B2
Filing date	Feb 10, 2015
Priority date	Feb 13, 2014
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

The purpose of the present invention is to obtain an ethylene.α-olefin.non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene.α-olefin.non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an α-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML(1+4)125° C. is 5-100, and (4) the B value is 1.20 or more.

First claim

The invention claimed is:

1. An ethylene.α-olefin.non-conjugated polyene copolymer comprising a structural unit derived from an ethylene [A], a structural unit derived from a C 4 -C 20 α-olefin [B] and a structural unit derived from a non-conjugated polyene [C], and satisfying the following (1) to (4):
(1) a molar ratio ([A]/[B]) of the structural units derived from the ethylene [A] to the structural units derived from the α-olefin [B] is 48.3/51.7 to 70.2/29.8;
(2) a content of the structural units derived from the non-conjugated polyene [C] is 1.24 to 3.22 mol % based on the total of the structural units of [A], [B] and [C] as 100 mol %;
(3) a Mooney viscosity ML(1+4)125° C. at 125° C. is 5 to 100; and
(4) a B value represented by the following formula (i) is in the range of 1.28 to 1.29:
B value=([ EX ]+2[ Y ])/[2×[ E ]×([ X ]+[ Y ])]  (i),

wherein [E], [X] and [Y] represent a mole fraction of the ethylene [A], the C4-C20 α-olefin [B] and the non-conjugated polyene [C] respectively, and [EX] represents an ethylene [A]-C 4 -C 20 α-olefin [B] diad chain fraction,

wherein the ethylene.α-olefin.non-conjugated polyene copolymer is obtained by copolymerizing an ethylene, a C4-C20 α-olefin and a non-conjugated polyene in the presence of an olefin polymerization catalyst containing:
(a) a transition metal compound represented by the following general formula [VII]:

wherein M is a titanium atom, a zirconium atom, or a hafnium atom;
R 5 and R 6 are substituted aryl groups wherein one or more of the hydrogen atoms of an aryl group are substituted with an electron-donating substituent having a substituent constant σ of −0.2 or less in the Hammett's rule; wherein when the substituted aryl group has a plurality of the electron-donating substituents, each of the electron-donating substituents may be the same or different; wherein the substituted aryl group optionally comprises a substituent selected from C1-C20 hydrocarbon groups, silicon-containing groups, nitrogen-containing groups, oxygen-containing groups, halogen atoms and halogen-containing groups other than the electron-donating substituents; and wherein when the substituted aryl group comprises a plurality of the substituents, each of the substituents may be the same or different;
Q is selected in an identical or different combination from halogen atoms, C1-C20 hydrocarbon groups, anionic ligands, and neutral ligands capable of being coordinated with a lone electron pair; and
j is an integer of 1 to 4; and
(b) at least one compound selected from
(b-1) organometallic compounds,
(b-2) organoaluminum oxy-compounds, and
(b-3) components which react with the transition metal compound (a) to form an ion pair,

wherein the C4-C20 α-olefin [B] is 1 butene, and
wherein the non-conjugated polyene [C] is 5-ethylidene-2-norbornene.

2. A cross-linked ethylene.α-olefin.non-conjugated polyene copolymer, wherein the ethylene.α-olefin.non-conjugated polyene copolymer according to claim 1 is cross-linked using a cross-linking agent.

3. A molded article formed using the ethylene.α-olefin.non-conjugated polyene copolymer according to claim 1 or a cross-linked ethylene.α-olefin.non-conjugated polyene copolymer wherein the ethylene.α-olefin.non-conjugated polyene copolymer according to claim 1 is cross-linked using a cross-linking agent.

4. A composition comprising the ethylene.α-olefin.non-conjugated polyene copolymer according to claim 1 .

5. A composition for a seal packing, wherein the composition comprises the ethylene.α-olefin.non-conjugated polyene copolymer according claim 1 .

6. A seal packing formed using the composition for a seal packing according to claim 5 .

7. The seal packing according to claim 6 , wherein the seal packing is a seal component for automobiles, a seal component for machinery, a seal component for electronic and electrical components, a gasket for construction, or a seal component for civil engineering and building materials.

8. A composition for forming a hose, wherein the composition comprises the ethylene.α-olefin.non-conjugated polyene copolymer according to claim 1 .

9. A hose having a layer formed by cross-linking treatment of the composition according to claim 8 for forming a hose.

10. The hose according to claim 9 , wherein the hose is used for any of uses for automobiles, motorbikes, industrial machinery, construction machinery or agricultural machinery.

Assignees

• Mitsui Chemicals Inc

Inventors

• Endo Koji
• Hiwara Mayumi
• Matsuura Sadahiko
• Mizobuchi Yusuke
• Yamamura Yuichi
• Noguchi Yuji
• Ishii Yuji
• Sakai Tatsuya
• Shishido Keisuke
• Ichino Kotaro
• Inomata Kiyohide
• Takeuchi Fumito
• Ide Kenta

Classifications

• C08F2500/17

  Viscosity · CPC title

• C08F4/64

  Titanium, zirconium, hafnium or compounds thereof · CPC title

• C08F4/65927

  two cyclopentadienyl rings being mutually bridged · CPC title

• C08F4/65908

  in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+ · CPC title

• C08F4/65912

  in combination with an organoaluminium compound · CPC title