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    • 4. 发明授权
    • Process for preparing low density porous crosslinked polymeric materials
    • 制备低密度多孔交联聚合物材料的方法
    • US5358974A
    • 1994-10-25
    • US159072
    • 1993-11-29
    • Thomas F. BrownscombeRonald M. BassLarry S. Corley
    • Thomas F. BrownscombeRonald M. BassLarry S. Corley
    • C08F2/00C08F2/22C08F2/32C08J9/28
    • C08J9/283C08F2/32C08J2325/08
    • In a process for the preparation of a low density porous crosslinked polymeric material by polymerizing a water-in-oil high internal phase emulsion, curing time of the monomers in the emulsion can be reduced without adversely affecting polymer properties by first advancing one or more of the monomers. All or a portion of the monomers are advanced in the presence of an advancement initiator or a free-radical-producing radiation source for about 5% to about 95% of the time effective to form a solid. Then, a water-in-oil high internal phase emulsion is formed with the advanced monomers and optionally additional monomers or the advanced monomers are added to a water-in-oil high internal phase emulsion containing other monomers. The emulsions containing the advanced monomers are cured. The process provides an improved method to incorporate volatile monomers in the porous polymeric material. The curing time is further reduced by carrying out the polymerization and crosslinking in the presence of a alkylperoxycarbonate or a alkylperoxycarboxylate polymerization initiator that is branched at the 1-position and/or the .alpha.-position.
    • 在通过聚合油包水高内相乳液制备低密度多孔交联聚合物材料的方法中,可以降低乳液中单体的固化时间,而不会不利地影响聚合物性质,首先推进一种或多种 单体。 全部或部分单体在提前引发剂或自由基产生辐射源存在下进行,约有效形成固体的约5%至约95%。 然后,将高级单体和任选的另外的单体或先进的单体加入到含有其它单体的油包水高内相乳液中形成油包水高相内乳液。 含有先进单体的乳液被固化。 该方法提供了将挥发性单体引入多孔聚合物材料中的改进方法。 通过在1位和/或α位上分支的过氧化碳酸烷基酯或烷基过氧羧酸酯聚合引发剂的存在下进行聚合和交联进一步降低固化时间。
    • 5. 发明授权
    • Process for preparing low density porous crosslinked polymeric materials
    • 制备低密度多孔交联聚合物材料的方法
    • US5290820A
    • 1994-03-01
    • US99018
    • 1993-07-29
    • Thomas F. BrownscombeRonald M. BassLarry S. Corley
    • Thomas F. BrownscombeRonald M. BassLarry S. Corley
    • C08F2/00C08F2/22C08F2/32C08J9/28
    • C08J9/283C08F2/32C08J2325/08
    • In a process for the preparation of a low density porous crosslinked polymeric material by polymerizing a water-in-oil high internal phase emulsion, curing time of the monomers in the emulsion can be reduced without adversely affecting polymer properties by first advancing one or more of the monomers. All or a portion of the monomers are advanced in the presence of an advancement initiator or a free-radical-producing radiation source for about 5% to about 95% of the time effective to form a solid. Then, a water-in-oil high internal phase emulsion is formed with the advanced monomers and optionally additional monomers or the advanced monomers are added to a water-in-oil high internal phase emulsion containing other monomers. The emulsions containing the advanced monomers are cured. The process provides an improved method to incorporate volatile monomers in the porous polymeric material. The curing time is further reduced by carrying out the polymerization and crosslinking in the presence of a alkylperoxycarbonate or a alkylperoxycarboxylate polymerization initiator that is branched at the 1-position and/or the .alpha.-position.
    • 在通过聚合油包水高内相乳液制备低密度多孔交联聚合物材料的方法中,可以降低乳液中单体的固化时间,而不会不利地影响聚合物性质,首先推进一种或多种 单体。 全部或部分单体在提前引发剂或自由基产生辐射源存在下进行,约有效形成固体的约5%至约95%。 然后,将高级单体和任选的另外的单体或先进的单体加入到含有其它单体的油包水高内相乳液中形成油包水高相内乳液。 含有先进单体的乳液被固化。 该方法提供了将挥发性单体引入多孔聚合物材料中的改进方法。 通过在1位和/或(α)位上分支的过氧化碳酸烷基酯或烷基过氧羧酸酯聚合引发剂的存在下进行聚合和交联进一步降低固化时间。