Process for fabricating porous silicone product
    62.
    发明授权
    Process for fabricating porous silicone product 失效
    制造多孔硅酮产品的方法

    公开(公告)号:US5362761A

    公开(公告)日:1994-11-08

    申请号:US134837

    申请日:1993-10-12

    Abstract: A process of fabricating a porous silicone product utilizing a silicone emulsion capable of forming an elastomer by removal of water therefrom. The silicone emulsion comprises a water emulsion of an organopolysiloxane, a cross-linking agent, and a curing catalyst. The process comprises the steps of freezing the silicone emulsion, and drying the frozen silicone emulsion, whereby water is sublimed therefrom and the porous silicone product is obtained. The resulting porous silicone product is best utilized as a selective permeable membrane for separation of a liquid component from a liquid solution containing two or more liquid components.

    Abstract translation: 使用能够通过从其中除去水形成弹性体的硅氧烷乳液制造多孔硅氧烷产品的方法。 硅氧烷乳液包含有机聚硅氧烷,交联剂和固化催化剂的水乳液。 该方法包括冷冻硅氧烷乳液和干燥冷冻的硅氧烷乳液的步骤,由此从中升华水,得到多孔硅氧烷产品。 得到的多孔硅酮产品最好用作用于从含有两种或多种液体组分的液体溶液中分离液体组分的选择性渗透膜。

    Multi-cellular cellulose particle and process for preparation thereof
    63.
    发明授权
    Multi-cellular cellulose particle and process for preparation thereof 失效
    多细胞纤维素颗粒及其制备方法

    公开(公告)号:US4958014A

    公开(公告)日:1990-09-18

    申请号:US230092

    申请日:1988-08-09

    Abstract: A multi-cellular cellulose particle having a multiplicity of cells spaced from one another by cell membranes is described, which cells have a maximum inscribed sphere diameter of larger than 2 .mu.m. The cells have a continuous hole structure in which the cells communicate with one another through openings in the membranes separating two adjacent cells. The multi-cellular cellulose particle is prepared by forming drops of a solution of cellulose or a cellulose derivative, cooling the drops at a temperature lower than the solidification temperature of the solution to freeze the drops, and removing the solvent by extraction or nullifying the dissolving power of the solvent.

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