Title:
CONTAINER STOPPER COMPRISING FOAM-MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2011/040585
Kind Code:
A1
Abstract:
Disclosed is a container stopper comprising a foamed article having a foaming ratio of 1.1 to 2.5, said foamed article being obtained by foaming a mixture of a thermoplastic elastomer composition comprising 100 parts by mass of a powdery hydrogenated block copolymer (a), which is obtained by hydrogenating a block copolymer comprising a polymer block (A) containing a structural unit originating in an aromatic vinyl compound and another polymer block (B) containing a structural unit originating in isoprene or an isoprene/butadiene mixture and containing a 3,4-bond unit and a 1,2-bond unit in a total amount of 45% or more, and has a peak top molecular weight (Mp), determined on polystyrene equivalent basis by gel permeation chromatography, of 250,000-500,000 and a bulk density of 0.10-0.40 g/ml; 5-150 parts by mass of a softening agent (b); and 5-150 parts by mass of a polyolefin resin (c), with 0.1-3 mass%, relative to the total mass of the thermoplastic elastomer composition, of a foaming agent (d).
Inventors:
SASAKI, Hiromitsu (36, Towada, Kamisu-sh, Ibaraki 97, 〒3140197, JP)
Application Number:
JP2010/067180
Publication Date:
April 07, 2011
Filing Date:
September 30, 2010
Export Citation:
Assignee:
KURARAY CO., LTD. (1621, Sakazu Kurashiki-sh, Okayama 01, 〒7100801, JP)
株式会社クラレ (〒01 岡山県倉敷市酒津１６２１ Okayama, 〒7100801, JP)
株式会社クラレ (〒01 岡山県倉敷市酒津１６２１ Okayama, 〒7100801, JP)
International Classes:
C08J9/06; B29C45/00; B65D39/04; C08F297/04; C08J9/12
Attorney, Agent or Firm:
OHTANI, Tamotsu (OHTANI PATENT OFFICE, Bridgestone Toranomon Bldg. 6F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
Download PDF:
Previous Patent: EXTRUSION CONTAINER
Next Patent: THERMOPLASTIC ELASTOMER COMPOSITION, MOLDED ARTICLE, AND SEALING MATERIAL FOR MEDICAL USE
Next Patent: THERMOPLASTIC ELASTOMER COMPOSITION, MOLDED ARTICLE, AND SEALING MATERIAL FOR MEDICAL USE