公开(公告)号：JPS62250940A

公开(公告)日：1987-10-31

申请号：JP9383286

申请日：1986-04-23

Applicant: AGENCY IND SCIENCE TECHN

Inventor： HIRASA OKIHIKO ,  AKEHATA TAKASHI ,  UNNO HAJIME ,  KO KASUMI

IPC: C08J3/28 ,  B01J13/00 ,  C08F16/16 ,  C08F16/18 ,  C08J7/00 ,  C08J9/00 ,  C08L29/10 ,  C08L101/00

Abstract: PURPOSE:To enhance temp. response, by preparing a temp. responsive porous gel comprising a crosslinked gel to polyvinyl methyl ether having fine voids and reversibly chamber in the shape by temp. in the presence of water. CONSTITUTION:An aqueous solution containing 5-50wt% of polyvinyl methyl ether is received in a container having a required shape to be held to the required shape and the temp. thereof is held in the vicinity of the phase transformation temp. of polyvinyl methyl ether. By this method, the aqueous solution is held to such a state that micro-phase separation is generated in a degree preventing the separation and sedimentation of polyvinyl methyl ether and, in this state, said aqueous solution is irradiated with gamma-rays or electron beam to form crosslinked gel of polyvinyl methyl ether. The obtained polyvinyl methyl ether crosslinked gel has fine voids due to the micro-phase separation and changes in its shape reversibly in response to temp. in the presence of water.