Method for determining degradation of thermoplastics
    14.
    发明授权
    Method for determining degradation of thermoplastics 有权
    确定热塑性塑料退化的方法

    公开(公告)号:US09557218B2

    公开(公告)日:2017-01-31

    申请号:US14159579

    申请日:2014-01-21

    Abstract: A method of determining degradation of a thermoplastic when exposed to light and heat includes illuminating the thermoplastic with a desired wavelength of light at a desired irradiance while maintaining the ambient air surrounding the thermoplastic at a desired temperature. The method is useful to measure the discoloration rate of transparent, translucent and opaque thermoplastics such as polycarbonates, the discoloration rate being determined by transmission or reflectance spectra of transmitted or reflected white light through or from the thermoplastic.

    Abstract translation: 当暴露于光和热时,确定热塑性塑料的降解的方法包括以期望的辐照度以期望的光线照射所需的光纤,同时将包围热塑性塑料的环境空气保持在期望的温度。 该方法可用于测量透明,半透明和不透明热塑性塑料如聚碳酸酯的变色率,变色速率由通过或来自热塑性材料的透射或反射白光的透射或反射光谱确定。

    Light emitting diode device and method for production thereof containing conversion material chemistry
    15.
    发明授权
    Light emitting diode device and method for production thereof containing conversion material chemistry 有权
    发光二极管装置及其生产方法,含有转化材料化学

    公开(公告)号:US09490405B2

    公开(公告)日:2016-11-08

    申请号:US13757207

    申请日:2013-02-01

    Abstract: In one embodiment, a light emitting device comprises: a lighting element located in a housing, wherein the housing is formed from a polymer composition comprising: a polymer material; and a coated conversion material. The coated conversion material is selected from a coated conversion material, coated yttrium aluminum garnet (YAG) doped with rare earth elements, coated terbium aluminum garnet doped with rare earth elements, coated silicate (BOSE) doped with rare earth elements; coated nitrido silicates doped with rare earth elements; coated nitride orthosilicate doped with rare earth elements, coated oxonitridoaluminosilicates doped with rare earth elements; as well as combinations comprising at least one of the foregoing. After the coated conversion material has been exposed to an excitation source, the coated conversion material has a luminescence lifetime of less than 10−4 seconds when the excitation source is removed.

    Abstract translation: 在一个实施例中,发光装置包括:位于壳体中的照明元件,其中所述壳体由聚合物组合物形成,所述聚合物组合物包括聚合物材料; 和涂覆的转化材料。 涂覆的转化材料选自涂覆的转化材料,掺杂有稀土元素的涂覆的钇铝石榴石(YAG),掺杂有稀土元素的涂覆的铽铝石榴石,掺杂有稀土元素的涂覆的硅酸盐(BOSE); 涂有稀土元素的氮化硅酸盐; 掺杂有稀土元素的涂覆的氮化硅原硅酸盐,掺杂有稀土元素的涂覆的氧化氮化铝硅酸盐; 以及包括前述的至少一个的组合。 在涂覆的转化材料暴露于激发源之后,当去除激发源时,涂覆的转化材料的发光寿命小于10-4秒。

    Method to Improve Remote Phosphor Optical Properties in Polycarbonate

    公开(公告)号:US20190169376A1

    公开(公告)日:2019-06-06

    申请号:US16313389

    申请日:2017-06-27

    Abstract: The disclosure concerns compositions and methods to improve remote phosphor optical properties in polycarbonate. One method includes combining a phosphor component and a polycarbonate component to form a phosphor-polycarbonate composition; and at a fixed phosphor concentration, combining the phosphor-polycarbonate composition with a diffusing agent comprising polytetrafluoroethylene (PTFE), wherein the diffusing agent diffuses light, and wherein the phosphor-polycarbonate composition exhibits an increase in chromaticity coordinate (CIEx) as determined by CIE 1931 or increase in CIE 1976 (u′,v′) of at least about 5% relative to a substantially similar reference composition in the absence of PTFE. Also described are methods to increase yield and reduce product accumulation of an extruded thermoplastic polycarbonate composition through the mixing of PTFE with a phosphor-polycarbonate (PCP) to form a PCP-PTFE component as well as a method forming a phosphor-polycarbonate master batch (PPCMB) composition, and during extrusion, adding PTFE to the PPCMB composition to form a PPCMB-PTFE composition.

Patent Agency Ranking