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    • 34. 发明授权
    • Process for producing microcapsules and microcapsule slurry
    • 生产微胶囊和微胶囊浆料的方法
    • US4574110A
    • 1986-03-04
    • US633960
    • 1984-07-24
    • Makoto AsanoKiyoharu HasegawaYukio TamuraYoshihiro Oono
    • Makoto AsanoKiyoharu HasegawaYukio TamuraYoshihiro Oono
    • B01J13/02B01J13/18B41M5/165C08F2/44B32B27/42
    • B01J13/18B41M5/165Y10S428/914Y10T428/2985
    • When obtaining microcapsules by covering a hydrophobic material with an aminoaldehyde polycondensation product as a wall-forming material in an acidic aqueous medium containing an anionic water-soluble polymer, a microcapsule slurry having a high solid content and low viscosity can be obtained by using as the anionic water-soluble polymer a multi-component copolymer consisting as essential monomer components thereof of at least three types of acrylic monomers selected respectively from (A) acrylic acid and/or methacrylic acid, (B) acrylonitrile and/or methacrylonitrile and (C) an acrylamidoalkylsulfonic acid and/or sulfoalkyl acrylate. Over a wide pH range, the microcapsule slurry obtained in accordance with this invention undergoes little viscosity changes and exhibits neither destruction of its dispersed state nor coagulating tendency. Resulting microcapsules have a sharp particle size distribution and are equipped with dense wall films.
    • 当通过在含有阴离子水溶性聚合物的酸性含水介质中用氨基醛缩聚产物作为壁形成材料覆盖疏水性材料获得微胶囊时,可以通过使用具有高固含量和低粘度的微胶囊浆料 阴离子水溶性聚合物,由分别选自(A)丙烯酸和/或甲基丙烯酸,(B)丙烯腈和/或甲基丙烯腈和(C)丙烯酸和/或甲基丙烯酸的至少三种类型的丙烯酸单体作为其基本单体成分组成的多组分共聚物, 丙烯酰胺基烷基磺酸和/或丙烯酸磺烷基酯。 在宽的pH范围内,根据本发明获得的微胶囊浆料几乎没有粘度变化,并且表现出其分散状态的破坏和凝固趋势。 所得的微胶囊具有尖锐的粒度分布,并配有致密的壁膜。
    • 36. 发明授权
    • Pressure sensitive recording unit
    • 压敏记录单元
    • US4398753A
    • 1983-08-16
    • US330325
    • 1981-12-14
    • Makoto AsanoKiyoharu HasegawaHiroyuki AkahoriMichihiro Tsujimoto
    • Makoto AsanoKiyoharu HasegawaHiroyuki AkahoriMichihiro Tsujimoto
    • B41M5/124B41M5/136B41L1/20
    • B41M5/136B41M5/1366Y10S428/914
    • Disclosed is a pressure sensitive recording unit which comprises a single base web sheet and a methine-type dyestuff and an organic oxidizing compound both supported on the single base web sheet, or a combination of first and second base web sheets and the methine-type dyestuff and organic oxidizing compound supported individually on the first and second base web sheets. Such a recording unit includes for example a pressure sensitive recording unit formed in combination of (a) a back-coated topsheet (CB-sheet) making use of microscopic capsules containing a solution obtained by dissolving a methine-type dyestuff in a solvent having a high boiling point and (b) a front-coated undersheet (CF-sheet) carrying an organic oxidizing compound coated thereon. Also disclosed is a pressure sensitive recording unit which includes a base web sheet carrying thereon such a methine-type dyestuff together with a metal ion sequestering agent and/or alkanol amine.
    • 公开了一种压敏记录单元,其包括单个基网网片和次甲基型染料和有机氧化剂,两者均支撑在单个基网幅材上,或第一和第二基网幅片与次甲基型染料 和在第一和第二基底幅片上分别支撑的有机氧化剂。 这样的记录单元包括例如压敏记录单元,其组合使用(a)使用含有通过将次甲基型染料溶解在溶剂中而得到的溶液的微观胶囊的背面涂布的顶片(CB片) 高沸点和(b)在其上涂覆有有机氧化剂的前涂底片(CF-片)。 还公开了一种压敏记录单元,其包括其上承载有次甲基型染料的基础网片与金属离子螯合剂和/或链烷醇胺。