Title:
PROCESS FOR PRODUCING POLYOLEFIN PREFOAM PARTICLE WITH WATER AS EXPANDING AGENT
Document Type and Number:
WIPO Patent Application WO/2005/080486
Kind Code:
A1
Abstract:
In a process for producing polyolefin prefoam particles with the use of water as an expanding agent, it is intended to provide polyolefin prefoam particles exhibiting high expansion ratio whose dispersion is low. Polyolefin prefoam particles are produced by a process effectively utilizing water used in a dispersion medium as an expanding agent, comprising dispersing, in an aqueous dispersion medium in a sealed container, polyolefin resin particles whose capability of water impregnation has been increased by causing the same to contain a hydroxyalkylethanolamine being a special cationic surfactant and a compound having triazine skeleton whose molecular weight per triazine skeleton is 300 or less; heating the dispersion to a temperature not lower than the softening temperature of the polyolefin resin particles and increasing the internal pressure of the sealed container by introduction of air or nitrogen; and releasing them to an atmosphere of pressure lower than the internal pressure to thereby effect expansion.
Inventors:
GODA TAKAYUKI (JP)
Application Number:
PCT/JP2005/001567
Publication Date:
September 01, 2005
Filing Date:
January 27, 2005
Export Citation:
Assignee:
KANEKA CORP (JP)
GODA TAKAYUKI (JP)
GODA TAKAYUKI (JP)
International Classes:
C08J9/12; C08J9/18; (IPC1-7): C08J9/18
Foreign References:
| JP2003171516A | 2003-06-20 | |||
| JPH10219019A | 1998-08-18 | |||
| JPH1192599A | 1999-04-06 | |||
| JP2003192820A | 2003-07-09 |
Attorney, Agent or Firm:
KANEKA CORPORATION (Kita-ku Osaka-shi, Osaka 88, JP)
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