Dye doped polymer microparticles
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United States of America Patent
Stats
-
Jun 2, 2020
Grant Date -
Aug 30, 2018
app pub date -
Apr 27, 2018
filing date -
May 8, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Various embodiments provide dye-doped polystyrene microspheres generated using dispersion polymerization. Polystyrene microspheres may be doped with fluorescent dyes, such as xanthene derivatives including Kiton Red 620 (KR620), using dispersion polymerization. Certain functionalities, such as sodium styrene sulfonate, may be used to shift the equilibrium distribution of dye molecules to favor incorporation of the dye into the particles. Polyelectrolyte materials, such as poly(diallyldimethyl ammnonium chloride), PolyDADMAC, may be used to electrostatically trap and bind dye molecules within the particles. A buffer may be used to stabilize the pH change of the solution during dye-doped polystyrene microsphere generation and the buffer may be selected depending on the pKa of the dye being incorporated. The various embodiments may provide dye-doped polystyrene microspheres, such as KR620-doped polystyrene microspheres that are non-toxic and non-carcinogenic. These non-toxic and non-carcinogenic dye-doped polystyrene microspheres may be suitable for use in wind tunnel testing.
First Claim
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International Classification(s)
- C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
- C08F:MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONL....
- G01M:TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR S....
- C09D:COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQ....
- G01P:MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, D....
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
- 2018 Application Filing Year
- C09K Class
- 2902 Applications Filed
- 1876 Patents Issued To-Date
- 64.65 % Issued To-Date
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- 0 Citation Count
- C09K Class
- 0 % this patent is cited more than
- 5 Age
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