Title:
ELASTOMER COMPOSITION CONTAINING HOLLOW PARTICLES, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/234162
Kind Code:
A1
Abstract:
Provided are: an elastomer composition containing hollow particles, wherein high dimensional stability is maintained during molding processes and the properties or functions imparted by the hollow particles are not easily compromised; and a production method for producing said elastomer composition through a kneading process in which the hollow particles are not easily collapsed, the void residual ratio is stably maintained, and the properties or functions imparted by the hollow particles are not easily compromised. This elastomer composition containing hollow particles comprises a base elastomer and hollow particles each having a shell containing a specific resin, has a storage modulus G' at 60°C of 2.5 MPa or less as obtained by dynamic viscoelasticity measurement, and has a void residual ratio of at least 80% as measured with a sheet-like molded body created by using the composition according to a predetermined test method. In addition, in the production method of the present disclosure, a raw material mixture, which comprises a base elastomer and hollow particles each having a shell containing a specific resin and has a storage modulus G' at 60°C of 2.5 MPa or less as obtained by dynamic viscoelasticity measurement, is kneaded at a temperature at which the storage modulus G' is 2.5 MPa or less, immediately after pre-kneading using a closed kneader at a temperature at which the storage modulus G' is 2.5 MPa or less, or after further preheating, at a temperature at which the storage modulus G' is 2.5 MPa or less, following the pre-heating.
Inventors:
WATANABE MASASHI (JP)
KATADA ARINOBU (JP)
KATADA ARINOBU (JP)
Application Number:
PCT/JP2023/019464
Publication Date:
December 07, 2023
Filing Date:
May 25, 2023
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
C08J9/32; C08L21/00
Domestic Patent References:
| WO2021112110A1 | 2021-06-10 | |||
| WO2017014064A1 | 2017-01-26 |
Foreign References:
| JPH1060151A | 1998-03-03 | |||
| JPH11130916A | 1999-05-18 |
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (JP)
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