Title:
BLOCK-COPOLYMER PELLETS, TACKY ADHESIVE COMPOSITION, AND STRETCH FILM
Document Type and Number:
WIPO Patent Application WO/2021/172140
Kind Code:
A1
Abstract:
Provided are block-copolymer pellets comprising 100 parts by weight of pellets of a block copolymer (A) and 0.01-5 parts by weight of a hydrocarbon-based dusting powder (B), wherein the block copolymer (A) comprises at least one aromatic-vinyl polymer block and at least one conjugated-diene polymer block and the hydrocarbon-based dusting powder (B) has a BET specific surface area of 0.50-3.00 m2/g, a volume-average particle diameter of 2.0-20 μm, a bulk density of 0.10-0.34 g/cm3, and a melting point of 75°C or greater. The block-copolymer pellets have a Shore A hardness of 10-80 and a BET specific surface area, as determined by Kr adsorption method, of 0.001-0.05 m2/g.
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Inventors:
ISHII YUTA (JP)
NOZAWA ATSUSHI (JP)
NOZAWA ATSUSHI (JP)
Application Number:
PCT/JP2021/005984
Publication Date:
September 02, 2021
Filing Date:
February 17, 2021
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
C08F297/04; C08L25/06; C08L53/02; C09J11/08; C09J153/02
Domestic Patent References:
| WO2015098664A1 | 2015-07-02 | |||
| WO2014002984A1 | 2014-01-03 |
Foreign References:
| JP2016069565A | 2016-05-09 | |||
| US6013717A | 2000-01-11 | |||
| JP2016069565A | 2016-05-09 |
Other References:
RUBBER CHEM. TECHNOL., vol. 45, 1972, pages 1295
See also references of EP 4112667A4
See also references of EP 4112667A4
Attorney, Agent or Firm:
TOKOSHIE PATENT FIRM (JP)
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