Title:
THERMALLY EXPANDABLE MICROCAPSULE
Document Type and Number:
WIPO Patent Application WO/2011/118437
Kind Code:
A1
Abstract:
Disclosed is a thermally expandable microcapsule, which causes less bursting or shrinking even at a high temperature while maintaining a high expansion ratio. Also disclosed are an expandable thermoplastic resin masterbatch using the thermally expandable microcapsule, an expansion-molded article, and a method for producing the thermally expandable microcapsule. The thermally expandable microcapsule comprises a shell composed of a polymer and a volatile expanding agent as a core agent encapsulated in the shell. The shell contains a polymer obtained by polymerizing a monomer composition containing a nitrile-based monomer and a monomer having a carboxyl group and a thermosetting resin. The thermosetting resin has two or more functional groups which react with a carboxyl group in each molecule and does not have a radically polymerizable double bond.
Inventors:
NATSUI Hiroshi (2-1, Hyakuyama, Shimamotocho, Mishima-gu, Osaka 21, 〒6180021, JP)
夏井 宏 (〒21 大阪府三島郡島本町百山２－１ 積水化学工業株式会社内 Osaka, 〒6180021, JP)
YAMAUCHI Hiroshi (2-1, Hyakuyama, Shimamotocho, Mishima-gu, Osaka 21, 〒6180021, JP)
夏井 宏 (〒21 大阪府三島郡島本町百山２－１ 積水化学工業株式会社内 Osaka, 〒6180021, JP)
YAMAUCHI Hiroshi (2-1, Hyakuyama, Shimamotocho, Mishima-gu, Osaka 21, 〒6180021, JP)
Application Number:
JP2011/055945
Publication Date:
September 29, 2011
Filing Date:
March 14, 2011
Export Citation:
Assignee:
Sekisui Chemical Co., Ltd. (4-4 Nishitemma 2-chome, Kita-ku Osaka-sh, Osaka 65, 〒5308565, JP)
積水化学工業株式会社 (〒65 大阪府大阪市北区西天満２丁目４番４号 Osaka, 〒5308565, JP)
NATSUI Hiroshi (2-1, Hyakuyama, Shimamotocho, Mishima-gu, Osaka 21, 〒6180021, JP)
夏井 宏 (〒21 大阪府三島郡島本町百山２－１ 積水化学工業株式会社内 Osaka, 〒6180021, JP)
積水化学工業株式会社 (〒65 大阪府大阪市北区西天満２丁目４番４号 Osaka, 〒5308565, JP)
NATSUI Hiroshi (2-1, Hyakuyama, Shimamotocho, Mishima-gu, Osaka 21, 〒6180021, JP)
夏井 宏 (〒21 大阪府三島郡島本町百山２－１ 積水化学工業株式会社内 Osaka, 〒6180021, JP)
International Classes:
C09K3/00; B01J13/14; C08F2/44; C08F283/00; C08J9/00
Attorney, Agent or Firm:
YASUTOMI & Associates (5-36, Miyahara 3-chome Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
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Claims: