• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a capsule (CS) comprising a shell (CQ) containing a liquid (L) transparent and thermally conductive, particles (A) having a thermochromic coating and particles (B) having a photochromic coating , the thermochromic particles (A) being larger than photochromic particles (B), the liquid (L) being such that in a first temperature range, its density is greater than the density of the thermochromic particles (A) and the density photochromic particles (B), and such that in a second temperature range higher than those of the first range, the density of the photochromic particles (B) is lower than the density of the liquid (L) which is itself smaller than the density of thermochromic particles (A). A timepiece or jewelery may include a coating provided with such capsules.
    公开号:CH714049A2
    申请号:CH01007/17
    申请日:2017-08-09
    公开日:2019-02-15
    发明作者:François Nicolas
    申请人:Swatch Group Res & Dev Ltd；
    IPC主号:
    专利说明:

    Description
    FIELD OF THE INVENTION The invention relates to thermochromic components and photochromic components, in particular applied to the field of watchmaking.
    Background of the invention [0002] Thermochromic capsules are known, which change color reversibly when the temperature rises or falls above a threshold value. The patent document EP 0 602 537 A1 describes in particular a watch provided with a temperature indicator device produced on the basis of such capsules. The watch indicates the temperature of the environment in which it is located, regardless of whether the watch is worn or unworn.
    [0003] Photochromic capsules are also known, which change color reversibly in reaction to exposure to light rays. The patent document CH 710 489 describes in particular a watch provided with a bezel comprising indicators produced on the basis of such capsules.
    It would however be advantageous to have capsules which can have both thermochromic and photochromic properties.
    权利要求:
    Claims (7)
    [1]
    SUMMARY OF THE INVENTION The aim of the present invention is therefore to propose a capsule having thermochromic properties and photochromic properties.
    To this end, the invention relates to a capsule as defined in claim 1.
    In the first temperature range, the thermochromic particles and the photochromic particles are such that their densities are less than the density of the liquid. So they are suspended in the liquid. Since thermochromic particles are larger than photochromic particles, the predominant effect in the capsule is thermochromism.
    In the second temperature range, higher than the first, the liquid has a lower density than in the first range. Thermochromic particles are such that their density is greater than the density of the liquid, while photochromic particles are such that their density is less than the density of the liquid. Thus the thermochromic particles flow while the thermochromic particles remain in suspension: the predominant effect in the capsule is therefore photochromism.
    Other advantageous features of the invention are given in claims 2 to 7. These features can be considered independently or in any technically possible combination.
    Brief description of the figures [0010] Other particularities and advantages will emerge clearly from the description which is given below, for information and in no way limitative, with reference to the appended figures, representing:
    In fig. 1 a capsule according to an embodiment of the invention, when its temperature is within a first temperature range
    In fig. 2 the capsule of fig. 1, when its temperature is in a second higher temperature range.
    Detailed description of the preferred embodiments [0011] FIG. 1 shows a capsule comprising a transparent waterproof shell. The shell contains a transparent liquid which does not form a barrier to ultraviolet rays, is thermally conductive and has high thermal expansion at a preferred temperature, which we will denote by Tx. It can for example be an oily mixture between a liquid paraffin having a melting temperature Tx and glycerin. The shell also contains two types of particles. The first particles are coated with a thermochromic coating, they will be called thermochromic particles. The second particles are coated with a photochromic coating, they will be called photochromic particles. These particles are in the form of spheres and can therefore flow more easily (unlike lamellar particles). The thermochromic and photochromic coatings are chosen so as to resist the oily medium. They are also selected so as to have a colored transition threshold making it possible to give interesting information, in particular to a wearer of a timepiece or of jewelry, in the case where the capsule is placed on a wall of said piece. This information can be a temperature, a light intensity, an ultraviolet level dangerous to health, etc.
    CH 714 049 A2 The thermochromic particles and the photochromic particles have, for example, a diameter of between 100 to 500 microns. In addition, the volume of thermochromic particles is greater than the volume of photochromic particles. Finally, the density of thermochromic particles is higher than the density of photochromic particles.
    In a first temperature range, for example between 0 and 10 degrees Celsius, the density of the liquid is greater than the density of the thermochromic particles and the density of the photochromic particles. Thus, the thermochromic particles and the photochromic particles are suspended in the liquid. However, the photochromic particles are masked by the thermochromic particles which have a larger volume and therefore a greater chromatic power. Thus, the dominant aesthetic effect in the capsule is thermochromism.
    In a second temperature range comprising higher temperatures than those of the first range, for example from 10 to 30 degrees Celsius, the liquid has a density lower than that which it had in the first temperature range. The density of the liquid is such that it is greater than the density of the photochromic particles, but less than the density of the thermochromic particles. Thus, the denser thermochromic particles sediment, that is to say flow and settle at the bottom of the hull. On the contrary, the photochromic particles remain in suspension. The dominant aesthetic effect in the capsule is therefore photochromism.
    Note that in one embodiment, the shell also contains a third type of particles, photoluminescent particles, allowing to see the colored transitions at night.
    Of course, the present invention is not limited to the illustrated example but is susceptible to various variants and modifications which will appear to those skilled in the art.
    claims
    1. Capsule (CS) comprising a shell (CQ) containing a transparent and thermally conductive liquid (L), particles (A) provided with a thermochromic coating and particles (B) provided with a photochromic coating, thermochromic particles ( A) being larger than photochromic particles (B), the liquid (L) being such that in a first temperature range, its density is greater than the density of thermochromic particles (A) and the density of photochromic particles (B ), and such that in a second temperature range higher than those of the first range, the density of the photochromic particles (B) is less than the density of the liquid (L) which is itself less than the density of the thermochromic particles ( AT).
    [2]
    2. Capsule (CS) according to the preceding claim, the liquid (L) being an oily mixture not forming a barrier to ultraviolet rays.
    [3]
    3. Capsule (CS) according to the preceding claim, the liquid (L) comprising liquid paraffin and glycerin.
    [4]
    4. Capsule (CS) according to one of the preceding claims, the thermochromic (A) and photochromic particles (B) being of spherical shape.
    [5]
    5. Capsule (CS) according to the preceding claim, the thermochromic (A) and photochromic particles (B) having a diameter between 100 and 500 microns.
    [6]
    6. Capsule (CS) according to one of the preceding claims, the shell (CQ) further comprising photoluminescent particles.
    [7]
    7. Timepiece or jewelry comprising a wall comprising a coating consisting of capsules (CS) according to one of the preceding claims.
    CH 714 049 A2
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    同族专利:
    公开号 | 公开日
    CH714049B1|2021-07-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01007/17A|CH714049B1|2017-08-09|2017-08-09|Liquid capsule with thermochromic and photochromic properties.|CH01007/17A| CH714049B1|2017-08-09|2017-08-09|Liquid capsule with thermochromic and photochromic properties.|
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