Lumps and composition

• US 9,914,820 B2
• Filed: 04/09/2014
• Issued: 03/13/2018
• Est. Priority Date: 04/12/2013
• Status: Active Grant

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Original Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Inventors: Ichino, Kotaro, Kikuchi, Yoshiharu
• Primary Examiner(s): Valdez, Deve E
• Application Number:
  US14/783,337
• Publication Number:
  US 20160053080A1
• Time in Patent Office: 1,434 Days
• Field of Search: 524554, 524528
• CPC Class Codes: C08F 210/18 with non-conjugated dienes, e.g. EPT rubbers
• CPC Class Codes: C08J 2321/00 Characterised by the use of unspecified rubbers
• CPC Class Codes: C08J 2423/08 Copolymers of ethene C08J2423/16 takes precedence
• CPC Class Codes: C08J 3/005 Processes for mixing polymers
• CPC Class Codes: C08J 3/203 Solid polymers with solid and/or liquid additives
• CPC Class Codes: C08K 5/0016 Plasticisers
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C08L 91/00 Compositions of oils, fats or waxes; Compositions of derivatives thereof

Abstract

Provided is a lump that is suitable to be used with rubber and compounding agents in producing rubber products with low hardness, of which an uniform kneaded product can be quickly obtained while kneading to produce rubber products, and that does not easily change its shape even when stored for a long period of time.

Claims

1. A lump comprising 100 parts by mass of ethylene copolymer (X) which comprises a structural unit derived from ethylene [A], a structural unit derived from α

-olefin [B] having 3 to 20 carbon atoms, and a structural unit derived from at least one component [C] selected from the group consisting of (c-1) polyene and (c-2) cyclic olefin, and which satisfies (1) to (3) below, and 1,100 to 2,000 parts by mass of plasticizer (Y);

wherein

(1) the structural unit derived from ethylene [A] represents 50 to 90 mol % in 100 mol % of a total of the structural unit derived from component [A], the structural unit derived from component [B], and the structural unit derived from component [C] in copolymer (X),

(2) the structural unit derived from component [C] represents 1.0 to 5.0 mol % in 100 mol % of a total of the structural unit derived from component [A], the structural unit derived from component [B], and the structural unit derived from component [C] in copolymer (X), and

(3) an intrinsic viscosity [η

] of ethylene copolymer (X) measured in a decalin solution of 135°

C. is 7.8 to 13.0 dl/g.

2. The lump according to claim 1, wherein an intrinsic viscosity [η

] of plasticizer (Y) measured in a decalin solution of 135°

C. is not more than 0.2 dl/g.

3. The lump according to claim 1, which has a mass of 1 kg to 100 kg.

4. The lump according to claim 1, wherein the lump is bale.

7. A production method of a rubber composition comprising melt kneading the lump described in claim 1, a rubber, and compounding agents as needed.

8. The production method of a rubber composition according to claim 7, wherein the rubber comprises an ethylene α

-olefin non-conjugated polyene copolymer.

5. A composition (Z) comprising 100 parts by mass of ethylene copolymer (X) which comprises a structural unit derived from ethylene [A], a structural unit derived from α

-olefin [B] having 3 to 20 carbon atoms, and a structural unit derived from at least one component [C] selected from the group consisting of (c-1) polyene and (c-2) cyclic olefin, and which satisfies (1) to (3) below, and 1,100 to 2,000 parts by mass of plasticizer (Y);

wherein

(1) the structural unit derived from ethylene [A] represents 50 to 90 mol % in 100 mol % of a total of the structural unit derived from component [A], the structural unit derived from component [B], and the structural unit derived from component [C] in copolymer (X),

(2) the structural unit derived from component [C] represents 1.0 to 5.0 mol % in 100 mol % of a total of the structural unit derived from component [A], the structural unit derived from component [B], and the structural unit derived from component [C] in copolymer (X), and

(3) an intrinsic viscosity [η

] of ethylene copolymer (X) measured in a decalin solution of 135°

C. is 7.8 to 13.0 dl/g.

6. The composition according to claim 5, wherein an intrinsic viscosity [η

] of plasticizer (Y) measured in a decalin solution of 135°

C. is not more than 0.2 dl/g.