Title:
ACRYLIC RUBBER HAVING EXCELLENT ROLL PROCESSING PROPERTIES, BANBURY PROCESSING PROPERTIES, WATER RESISTANCE, STRENGTH CHARACTERISTICS AND PRESSURE-RESISTANT PERMANENT SET CHARACTERISTICS
Document Type and Number:
WIPO Patent Application WO/2021/246516
Kind Code:
A1
Abstract:
Provided is an acrylic rubber having excellent roll processing properties, Banbury processing properties, water resistance, strength characteristics and pressure-resistant permanent set characteristics. This acrylic rubber comprises: a bond unit derived from at least one type of (meth)acrylic acid ester selected from the group consisting of an alkyl (meth)acrylate ester and an alkoxyalkyl (meth)acrylate ester; a bond unit derived from a monomer containing at least one type of reactive group selected from the group consisting of a carboxyl group, an epoxy group and a chlorine atom; and, if necessary, a bond unit derived from another monomer. The weight average molecular weight (Mw), as determined from the absolute molecular weight and absolute molecular weight distribution measured using a GPC-MALS method, is 1,000,000-3,500,000. The ratio (Mw/Mn) of the weight average molecular weight (Mw) and the number average molecular weight (Mn) is 3.7-6.5. The amount of methyl ethyl ketone-insoluble components is 50 wt% or less. The ash content is 0.15 wt% or less. The total amount of sodium, magnesium, calcium, phosphorus and sulfur in ash is 50 wt% or more.
Inventors:
MASUDA HIROFUMI (JP)
KAWANAKA TAKAFUMI (JP)
KAWANAKA TAKAFUMI (JP)
Application Number:
PCT/JP2021/021349
Publication Date:
December 09, 2021
Filing Date:
June 04, 2021
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
C08F220/10; C08F2/22; C08F2/38; C08F6/14; C08F220/18; C08F220/28; C08K3/013; C08K5/00; C08L33/06; C08L33/08; C08L33/14
Domestic Patent References:
| WO2018139466A1 | 2018-08-02 | |||
| WO2019078167A1 | 2019-04-25 | |||
| WO2020250570A1 | 2020-12-17 |
Foreign References:
| JP2019031672A | 2019-02-28 | |||
| JP2020056013A | 2020-04-09 |
Attorney, Agent or Firm:
ARIGA, Eiichiro et al. (JP)
Download PDF: