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    • 4. 发明授权
    • Process to prepare two phase foam compositions and two phase foam
compositions
    • 制备两相泡沫组合物和两相泡沫组合物的方法
    • US5646193A
    • 1997-07-08
    • US560140
    • 1995-11-17
    • Thomas Fairchild BrownscombeRonald Marshall BassPui Kwan WongGeorge Constantine BlytasWilliam Peter GergenMaryanne Mores
    • Thomas Fairchild BrownscombeRonald Marshall BassPui Kwan WongGeorge Constantine BlytasWilliam Peter GergenMaryanne Mores
    • A61F13/15A61L15/42C08J9/28
    • C08J9/283A61F13/15203A61L15/425
    • A process is provided for the production of a porous crosslinked polymeric foam comprising the steps of: (a) providing a first water-in-oil emulsion comprising (i) a first mixture of polymerizable monomers comprising at least one oil-soluble vinyl monomer and from about 2 to about 70 weight percent, based on the mixture, of a multifunctional unsaturated crosslinking monomer, (ii) at least 70 weight percent, based on the emulsion, of water as the internal phase (iii) an effective amount to produce the water-in-oil emulsion of a first surfactant, and (iv) a first polymerization initiator; (b) providing a second water-in-oil emulsion comprising (i) a mixture of polymerizable monomers comprising at least one oil-soluble vinyl monomer and from about 2 to about 70 weight percent, based on the mixture, of a second multifunctional unsaturated crosslinking monomer, (ii) at least 70 weight percent, based on the emulsion, of water as the internal phase (iii) an effective amount to produce the water-in-oil emulsion of a second surfactant, and (iv) a second polymerization initiator; (c) combining the first and second emulsions; and (d) curing said polymerizable monomers under conditions effective to polymerize and crosslink the polymer prior to significant diffusion between the emulsions. Polymeric foams can be prepared by this process that exhibit positive attributes of foams formed by curing of each of the emulsions individually.
    • 提供了一种生产多孔交联聚合物泡沫体的方法,包括以下步骤:(a)提供第一种油包水乳液,其包含(i)包含至少一种油溶性乙烯基单体的可聚合单体的第一混合物和 基于该混合物,约2至约70重量%的多官能不饱和交联单体,(ii)基于乳液的至少70重量%的作为内相的水(iii)有效量的产生 第一表面活性剂的油包水乳液,和(iv)第一聚合引发剂; (b)提供第二种油包水乳液,其包含(i)包含至少一种油溶性乙烯基单体的可聚合单体和基于该混合物的约2-约70重量%的第二多官能不饱和单体的混合物 交联单体,(ii)基于乳液至少70重量%的作为内相的水(iii)有效量的产生第二表面活性剂的油包水乳液,和(iv)第二聚合 发起者 (c)组合第一和第二乳液; 和(d)在有效聚合和交联聚合物的条件下,在乳液显着扩散之前,使所述可聚合单体固化。 聚合物泡沫可以通过这种方法制备,其显示了通过单独固化每种乳液形成的泡沫的阳性。