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    • 4. 发明授权
    • Photocurable compositions
    • 可光固化组合物
    • US08097399B2
    • 2012-01-17
    • US10593746
    • 2005-03-21
    • Ranjana PatelMichael RhodesYong Zhao
    • Ranjana PatelMichael RhodesYong Zhao
    • G03F7/027B29C67/00
    • G03F7/038B29C2035/0827B29K2033/00B33Y70/00G03F7/0037
    • An optical moulding process is disclosed comprising the sequential steps of: (a)(y) forming a layer of a photocurable composition; and (bXz) irradiating selected areas of the composition in the layer with radiation from a radiation source, thereby curing the composition in said selected areas and repeating the steps a) and b) on top of an earlier cured layer to form a three dimensional structure, wherein the radiation source used in step b) is a non-coherent source of radiation and wherein the photocurable composition comprises at least two curable components: (i) 45%-95% (and preferably at least 50%, more preferably at least 60%, e.g. at least 70%) by weight of the total curable components in the composition is a first component that is photocurable and that is such that, when cured in the presence of a photocuring initiator by exposure to UV radiation having an energy of 30 mJ/cm2, at least 90% of the component is cured within 50 milliseconds; and (ii) 5% to 55% (and preferably 10-40%, more preferably 15 to 30%, e.g. about 20%) by weight of the total curable components in the composition is a second component that results in the composition, on curing, shrinking, in a linear direction, by less than 3% and preferably that results in the composition having, after cure, a Tg of greater than 50° C., preferably at least 100° C. and more preferably at least 120° C.
    • 公开了一种光学模制方法,其包括以下顺序步骤:(a)(y)形成光固化组合物层; 和(bXz)用来自辐射源的辐射照射该组合物中的组合物的所选区域,从而固化所述选定区域中的组合物,并在较早固化层的顶部重复步骤a)和b),以形成三维结构 其中步骤b)中使用的辐射源是非相干辐射源,并且其中所述可光固化组合物包含至少两种可固化组分:(i)45%-95%(优选至少50%,更优选至少为 组合物中总可固化组分的60重量%,例如至少70重量%)是可光固化的第一组分,并且使得当在光固化引发剂存在下通过暴露于具有 30mJ / cm 2,至少90%的组分在50毫秒内固化; 和(ii)组合物中总可固化组分的5重量%至55重量%(优选10-40重量%,更优选15至30重量%,例如约20重量%)是导致组合物的第二组分, 在线性方向上固化,收缩小于3%,优选地导致组合物在固化后具有大于50℃,优选至少100℃,更优选至少120℃的Tg C。