Nitto-denko Corporation

Nitto Electric Industrial Co., Ltd.

Yoshikazu Musa

Yasuo Ninomiya

Chiaki Komamura

Yoichi Kainoh

Isao Mune

A liquid active substance-containing membrane having an anisotropic structure comprising (a) a polymeric cellular layer containing a myriad of minute closed cells and septa thereof and (b) a dense thin layer covering the surface of the cellular layer, wherein the minute cells contain therein a liquid active substance having a limited solubility in the polymer at normal temperature. The membrane of the present invention can be advantageously used to release a liquid active substance such as pheromones and pesticides at a substantially constant, controlled rate over a long period of time.

Membrane containing a liquid active substance and process for the

A process for producing a microcapsule containing a liquid active material is described, comprising the steps of:

Process for producing a microcapsule containing a liquid active material

A non-aqueous composite gel and a process for the production thereof are described, said gel containing emulsified high boiling point hydrophilic liquid particles, said non-aqueous composite gel consisting of an O/O emulsion comprising from 15 to 99% by weight of a continuous phase composed of a rubber component and an oil component, and from 85 to 1% by weight of a dispersed phase composed of a high boiling point hydrophilic liquid wherein the rubber component is cross-linked. This non-aqueous composite gel can be used, for example, as a heat insulating material, especially to maintain low or high temperature environments, as a heat retaining material and as a hospital mat.

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Osaka, Japan

Yoshikazu Musa