Extrudable compositions comprising fillers and devices made from the compositions

Patent metadata

Field	Value
Publication number	US-12352675-B2
Application number	US-202117236554-A
Country	US
Kind code	B2
Filing date	Apr 21, 2021
Priority date	May 6, 2019
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A filter comprises a support substrate. A film is disposed on the support substrate, the film comprising a polymer matrix material and a filler. The filler has a particle size distribution configured to filter a desired range of wavelengths of light, the particle size distribution having been achieved by extrusion. An extrudable composition is also disclosed. The extrudable composition comprises a polymer matrix material and a filler. The filler has an average particle size ranging from about 1 nm to about 700 nm and a concentration ranging from 0.001 weight % to 0.3 weight %, relative to the total weight of the extrudable composition.

First claim

What is claimed is:

1. A filter, comprising:
a support substrate; and
a film disposed on the support substrate, the film comprising a polymer matrix material and a filler,
wherein the filler comprises a plurality of particles with a particle size distribution configured to filter a desired range of wavelengths of light, the particle size distribution having been achieved by extrusion, the filler having an average particle size ranging from about 1 nm to about 700 nm,
wherein 90% to 100% of the plurality of particles have a particle size within 10% of an average target particle size, and
wherein the polymer matrix material comprises at least one polymer chosen from polycarbonates, Polyethylene terephthalate (“PET”), Polyethylene (“PE”), acrylate polymers, vinyl polymers, polyvinylbutyral (“PVB”) and a PVB copolymer, the PVB copolymer comprising polyvinylbutyral units and one or more of polyvinyl alcohol units and polyvinyl acetate units.

2. The filter of claim 1 , wherein the range of wavelengths of light are selected from wavelengths in one or both of the visible spectrum and the near infrared spectrum.

3. The filter of claim 1 , wherein the range of wavelengths of light include wavelengths across the entire visible spectrum, the filter being configured to reduce the intensity of light in the visible spectrum by an amount ranging from 5% to 80%, compared to the intensity of visible light incident on the filter.

4. The filter of claim 1 , further comprising a second substrate disposed on the film, the film being disposed between the support substrate and the second substrate.

5. The filter of claim 4 , wherein one or both of the support substrate and the second substrate are transparent to visible light.

6. The filter of claim 4 , wherein one or both of the support substrate and the second substrate comprise at least one material chosen from glass and polycarbonate.

7. The filter of claim 4 , wherein the support substrate has a first refractive index, the film has a second refractive index and the second substrate has a third refractive index, a ratio of the first refractive index to the second refractive index ranging from 0.9 to 1.1 and a ratio of the third refractive index to the second refractive index ranging from 0.9 to 1.1.

8. The filter of claim 4 , wherein the film has a thickness ranging from 1 nanometer to 1 centimeter.

9. The filter of claim 1 , wherein the film has a thickness ranging from 1 nanometer to 1 centimeter.

10. The filter of claim 1 , wherein the filler has an average particle size ranging from about 10 nm to about 500 nm.

11. The filter of claim 10 , wherein the film comprises from 0.001 weight % to 30 weight % filler, relative to the total weight of the film.

12. The filter of claim 10 , wherein the film comprises from 0.01 weight % to 0.15 weight % filler, relative to the total weight of the film.

13. The filter of claim 10 , wherein the film comprises from 0.01 weight % to 0.30 weight % filler, relative to the total weight of the film.

14. The filter of claim 13 , wherein the filler is chosen from carbon black, carbon nanotubes, graphene, TiO 2 , and combinations thereof.

15. The filter of claim 1 , wherein the filler is chosen from carbon black, carbon nanotubes, graphene, TiO 2 , and combinations thereof.

16. The filter of claim 15 , wherein the polymer matrix material comprises at least one polymer chosen from polycarbonates, Polyethylene terephthalate (“PET”), Polyethylene (“PE”), acrylate polymers, vinyl polymers, polyvinylbutyral (“PVB”) and a PVB copolymer, the PVB copolymer comprising polyvinylbutyral units and one or more of polyvinyl alcohol units and polyvinyl acetate units.

17. The filter of claim 1 , wherein the filter reduces the intensity of light in the visible spectrum by an amount ranging from 20% to 50% compared to the intensity of visible light incident on the filter.

18. The filter of claim 17 , wherein the filter reduces the intensity of light in the visible spectrum by about 30% compared to the intensity of visible light incident on the filter.

19. A filter, comprising:
a support substrate;
a film disposed on the support substrate, the film comprising a polymer matrix material and a filler; and
a second substrate disposed on the film, the film being disposed between the support substrate and the second substrate,
wherein the filler comprises a plurality of particles with a particle size distribution configured to filter a desired range of wavelengths of light, the particle size distribution having been achieved by extrusion, and
wherein the support substrate has a first refractive index, the film has a second refractive index, and the second substrate has a third refractive index, and wherein a ratio of the first refractive index to the second refractive index ranges from 0.9 to 1.1 and a ratio of the third refractive index to the second refractive index ranging from 0.9 to 1.1.

20. A filter, comprising:
a support substrate; and
a film disposed on the support substrate, the film comprising a polymer matrix material and a filler,
wherein the filler comprises a plurality of particles with a particle size distribution configured to filter a desired range of wavelengths of light, the particle size distribution having been achieved by extrusion,
wherein 90% to 100% of the plurality of particles have a particle size within 10% of an average target particle size,
wherein the filler is chosen from carbon black, carbon nanotubes, graphene, TiO 2 , and combinations thereof, and
wherein the polymer matrix material comprises at least one polymer chosen from polycarbonates, Polyethylene terephthalate (“PET”), Polyethylene (“PE”), acrylate polymers, vinyl polymers, polyvinylbutyral (“PVB”) and a PVB copolymer, the PVB copolymer comprising polyvinylbutyral units and one or more of polyvinyl alcohol units and polyvinyl acetate units.

Assignees

• Boeing Co

Inventors

• Bruton Eric Alan
• Shawgo Loyal Bruce

Classifications

• G01N2015/0277

  Average size only · CPC title

• C08J2329/14

  Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols · CPC title

• G02B5/223

  containing organic substances, e.g. dyes, inks or pigments · CPC title

• C08K2003/2241

  Titanium dioxide · CPC title

• C08K3/042

  Graphene or derivatives, e.g. graphene oxides · CPC title