Title:
熱可塑性エラストマー組成物からなる蛇腹状成形体
Document Type and Number:
Japanese Patent JP6930931
Kind Code:
B2
Abstract:
To provide a bellows-like molding that is composed of a thermoplastic elastomer composition and prevents oil bleeding and has bending properties and oil resistance.SOLUTION: A bellows-like molding has a thermoplastic elastomer composition (X) that contains a crystalline polyolefin (A) 60-200 pts.mass with a melt flow rate (230°C, 2.16 kg load) of 0.01-100 g/10 minutes and a melting point (Tm) of 100°C or more, an ethylene α-olefin (C3-20) nonconjugated polyene copolymer (B) 100 pts.mass with a Mooney viscosity ML(125°C) of 10-250, and a filler (C) 20-70 pts.mass. The filler (C) contains a magnesium silicate filler (C-α) and at least one filler (C-β) selected from a carbonate filler (C-β1) and an aluminum silicate filler (C-β2), with a mass ratio between the magnesium silicate filler (C-α) and the filler (C-β) ((C-α)/(C-β)) of 100/30-100/1200, wherein, in the thermoplastic elastomer composition (X), an initial flexural modulus at 23°C is 50-180 MPa, and a type D hardness (after 5 seconds) in accordance with JIS K6253 is 20-50 or a type A hardness (instantaneous value) in accordance with JIS K6253 is 80-95. There are also provided a sealant and an automobile dust cover composed of the molding.SELECTED DRAWING: None
Inventors:
Yoda Yusuke
Tomohiro Yamaguchi
Kazuki Mita
Akihiro Yamamoto
Tomoyuki Nakata
Kentaro Nakayama
Tomohiro Yamaguchi
Kazuki Mita
Akihiro Yamamoto
Tomoyuki Nakata
Kentaro Nakayama
Application Number:
JP2018010745A
Publication Date:
September 01, 2021
Filing Date:
January 25, 2018
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
C08L23/16; C08K3/26; C08K3/34; C08L23/02; C08L61/06; C09K3/10; F16J3/04
Domestic Patent References:
| JP2017133550A | ||||
| JP2009275213A | ||||
| JP8120129A | ||||
| JP2006104348A |
Foreign References:
| WO2016160083A1 |
Attorney, Agent or Firm:
Hiraki International Patent Office