会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Ultraviolet absorbing photochromic glass of low silver content
    • 紫外线吸收光银色含量低的玻璃
    • US4549894A
    • 1985-10-29
    • US617908
    • 1984-06-06
    • Roger J. AraujoGeorge B. HaresDavid J. KerkoDavid W. MorganDavid L. Morse
    • Roger J. AraujoGeorge B. HaresDavid J. KerkoDavid W. MorganDavid L. Morse
    • C03C3/091C03C4/06
    • C03C4/06C03C3/091
    • There is disclosed a method of producing a photochromic glass having a reduced transmittance for ultraviolet radiation while having substantially unimpaired photochromic properties. The method comprises providing a combination of 0.1-1.0% CeO.sub.2 and 0.1-1.5% Sb.sub.2 O.sub.3 and/or As.sub.2 O.sub.3 as part of the glass composition. In an embodiment utilizing minimal silver content, the glass article in thicknesses of 1.3 to 2.0 mm. can be chemically strengthened to surpass the impact specification imposed by the Federal Food and Drug Administration for eyewear, will transmit less than 0.2% of radiation having wavelengths between 290-315 nm, and will demonstrate a darkened luminous transmittance at 20.degree.-25.degree. C. below 35% and a fading rate such that after five minutes the luminous transmittance will be at least 1.75 times that of the darkened transmittance. These glasses consist essentially of:______________________________________ SiO.sub.2 55-61 Ag >0.1-
    • 公开了一种具有降低的紫外线辐射透射率而具有基本上未受损的光致变色特性的光致变色玻璃的方法。 该方法包括提供0.1-1.0%CeO 2和0.1-1.5%Sb 2 O 3和/或As 2 O 3的组合作为玻璃组合物的一部分。 在使用最小银含量的实施方案中,玻璃制品的厚度为1.3至2.0mm。 可以化学强化超过联邦食品和药物管理局对眼镜施加的影响规格,将传播波长在290-315 nm之间的辐射不到0.2%,并将在20°-25°C显示变暗的透光率 低于35%,并且褪色速率使得在5分钟后,透光率将至少为透光度变暗的1.75倍。 这些玻璃基本上由以下组成:-SiO2 55-61 Ag> 0.1- <0.2- B2O3 18-21 Cl 0.2-0.6 -Al2O3 5-11 Br 0.05-0.2 -Li2O 1.5-3 CuO 0.003-0.015 -Na2O 2-5 CeO2 0.1-1.0 -K2O 4.5-8 Sb2O3 0.1-1.5 -
    • 10. 发明授权
    • Photochromic glass
    • 光致变色玻璃
    • US4190451A
    • 1980-02-26
    • US14981
    • 1979-02-28
    • George B. HaresDavid L. MorseThomas P. Seward, IIIDennis W. Smith
    • George B. HaresDavid L. MorseThomas P. Seward, IIIDennis W. Smith
    • C03C3/064C03C3/11C03C4/06C03C21/00G02C7/10C03C3/08C03C3/26
    • C03C4/06Y10S501/903
    • The instant invention is concerned with transparent photochromic glass compositions which not only exhibit desirably rapid darkening and fading characteristics, but which also demonstrate the other physical and optical properties required for use in ophthalmic applications. Such glasses utilize the presence of silver chloride and/or silver bromide crystals to impart photochromic behavior in a narrowly-defined composition range within the alkali metal aluminoborosilicate base system. Copper ions are also included in the composition to perform as a sensitizing agent. The glasses have the capability of being either thermally tempered or chemically strengthened to comply with the United States Food and Drug Administration regulations for lenses used in ophthalmic applications. Improved independence of temperature effects upon the photochromic properties can be achieved where the copper level, expressed as CuO, is maintained between about 0.004-0.02% by weight, the chloride value, expressed as Cl, is held between about 0.1-0.25% by weight, the silver content, expressed as Ag, is included between about 0.15-0.3% by weight, and the quantity of bromide, expressed as Br, is varied between about 0.1-0.2% by weight. The fading rate of the glasses is enhanced by maintaining the molar ratio of alkali metal oxides to B.sub.2 O.sub.3 between about 0.55-0.85, the molar ratio of alkali metal oxides minus Al.sub.2 O.sub.3 to B.sub.2 O.sub.3 is about 0.25-0.4, and the weight ratio Ag:(Cl+Br) is about 0.65-0.95.
    • 本发明涉及透明光致变色玻璃组合物,其不仅表现出期望的快速变暗和褪色特性,而且还显示了用于眼科应用所需的其它物理和光学性质。 这种玻璃利用氯化银和/或溴化银晶体的存在,以在碱金属铝硼硅酸盐基体系内的窄范围的组成范围内赋予光致变色行为。 铜离子也包括在组合物中以用作敏化剂。 眼镜具有热回火或化学强化的能力,以符合美国食品和药物管理局对眼科应用中使用的镜片的规定。 可以实现温度对光致变色性能的独立性,其中以CuO表示的铜含量维持在约0.004-0.02重量%之间,氯化物值(以Cl表示)保持在约0.1-0.25重量% ,以Ag表示的银含量在约0.15-0.3重量%之间,以Br表示的溴的量在约0.1-0.2重量%之间变化。 通过将碱金属氧化物与B 2 O 3的摩尔比保持在约0.55-0.85之间,碱金属氧化物减去Al 2 O 3与B 2 O 3的摩尔比为约0.25-0.4,并且重量比Ag Cl + Br)为约0.65-0.95。