Nippon Oil Fats Co., Ltd.

Other

Rikagaku Kenkyusho

Forestry and Forest Products Research Institute

Kiyotaka Shigehara

Yoshishige Murata

Akira Yamada

Hidenari Nakahama

Seizo Miyata

Mikio Takagi

Takayuki Otsu

Yoshihiro Katayama

Naoyuki Amaya

Masahiko Hara

Kazuichi Tsuda

Norihiro Kaiya

An ultrathin polymeric membrane has a membrane thickness of 10 to 1,000 .ANG.. The membrane is constituted of polycarboxylate and obtained by the spin coating method or by the Langmuir-Blodgett method. The polycarboxylate contains recurrent units represented by the formula (I) ##STR1## wherein R.sub.1 and R.sub.2 represent different groups and each stands for a methyl group or a hydrogen atom, and R represents a hydrocarbon group selected from the group consisting of a branched alkyl group having 3 to 12 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a substituted alkyl group having 2 to 6 carbon atoms, a substituted cycloalkyl group having 3 to 10 carbon atoms and a siloxanic hydrocarbon group.

Ultrathin membrane of polymethacrylate or polycrotonate and device

A Langmuir-Blodgett ultrathin membrane is constituted of polyfumarate having a degree of polymerization of 20 to 10,000. The polyfumarate is obtained by polymerizing fumarate represented by the general formula of: ##STR1## wherein at least one of R.sub.1 and R.sub.2 represents a bulky hydrocarbon group such as a branched alkyl group, a cycloalkyl group or a substituent thereof, a fluorine-substituted hydrocarbon group, a hetero atom-containing hydrocarbon group or a silicon-containing group.

Langmuir Blodgett ultrathin membrane of polyfumarate

Growing community of inventors

Tokyo, Japan

Kiyotaka Shigehara