Optically dissimilar composition for polymeric reflective bodies
First Claim
1. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 30% of light incident on said body is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1, and wherein one of said first and second polymeric materials comprises a copolycarbonate of bisphenol-A and 4,4'"'"'-thiodiphenol
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Accused Products
Abstract
A multilayered reflective body which is thermoformable and capable of being fabricated into films, sheets and a variety of parts while maintaining a uniform reflective appearance is provided. The reflective polymeric body includes at least first and second diverse polymeric materials of a sufficient number of alternating layers of the first and second polymeric materials such that at least 30% of the light incident on the body is reflected. A substantial majority of the individual layers of the body have an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, and adjacent layers of the first and second polymeric materials differ from each other in refractive index by at least about 0.1. The reflective body may be fabricated into sheets, mirrors, noncorroding metallic appearing articles and parts, reflectors, reflective lenses, and the like.
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Citations
71 Claims
- 1. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 30% of light incident on said body is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1, and wherein one of said first and second polymeric materials comprises a copolycarbonate of bisphenol-A and 4,4'"'"'-thiodiphenol
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23. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that essentially no visibly perceived iridescence is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1, and wherein one of said first and second polymeric materials comprises a copolycarbonate of bisphenol-A and 4,4'"'"'-thiodiphenol.
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24. A mirror like polymeric article having at least first and second major surfaces, said article comprising a sufficient number of alternating layers of first and second polymeric materials such that at least 30% of light incident on said article is reflected, a substantial majority of the individual layers of said article having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1, wherein one of said major surfaces includes a light absorbent layer, and wherein one of said first and second polymeric materials comprises a copolycarbonate of bisphenol-A and 4,4'"'"'-thiodiphenol.
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25. A mirror like polymeric article having at least first and second major surfaces, said article comprising a sufficient number of alternating layers of first and second polymeric materials such that at least 30% of light incident on said article is reflected, and at least one interior light absorbing layer, a substantial majority of the individual layers of said article having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1, and wherein one of said first and second polymeric materials comprises a copolycarbonate of bisphenol-A and 4,4'"'"'-thiodiphenol.
- 26. A birefringent light polarizer which reflects light anisotropically, comprising multiple layers of at least first and second diverse polymeric materials, a substantial majority of the individual layers of said polarizer having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1 in one plane of the polarizer, and wherein one of said first and second polymeric materials comprises a copolycarbonate of bisphenol-A and 4,4'"'"'-thiodiphenol.
- 28. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 30% of light incident on said body is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1 and wherein one of said first and second polymeric materials comprises a copolymer of methyl methacrylate and vinylidene fluoride or miscible blend of polymethyl methacrylate and polyvinylidene fluoride.
- 53. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 30% of light incident on said body is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1 and wherein said first polymeric material comprises a blend of polymethyl methacrylate and a fluoropolymer, and wherein said fluoropolymer comprises a copolymer of vinylidene fluoride and a monomer selected from the group consisting of chlorofluoroethylene, chlorodifluoroethylene, chlorotrifluoroethylene, chlorotrifluoroethylene, hexafluoroacetone, hexafluoropropylene, hexafluoropropene, pentafluoropropylene, trifluoroethylene, tetrafluoroethylene, and vinyl fluoride.
- 56. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 30% of light incident on said body is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1 and wherein one of said first and second polymeric materials comprises a copolymer of methyl methacrylate, vinylidene fluoride, and a fluorocarbon monomer selected from the group consisting of chlorofluoroethylene, chlorodifluoroethylene, chlorotrifluoroethylene, chlorotrifluoroethylene, hexafluoroacetone, hexafluoropropylene, hexafluoropropene, pentafluoropropylene, trifluoroethylene, tetrafluoroethylene, and vinyl fluoride.
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59. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that essentially no visibly perceived iridescence is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1, and wherein one of said first and second polymeric materials comprises a copolymer of methyl methacrylate and vinylidene fluoride or a miscible blend of polymethyl methacrylate and polyvinylidene fluoride.
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60. A mirror like polymeric article having at least first and second major surfaces, said article comprising a sufficient number of alternating layers of first and second polymeric materials such that at least 30% of light incident on said article is reflected, a substantial majority of the individual layers of said article having an optical thickness of at not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1, wherein one of said major surfaces includes a light absorbent layer, and wherein one of said first and second polymeric materials comprises a copolymer of methyl methacrylate and vinylidene fluoride or miscible blend of polymethyl methacrylate and polyvinylidene fluoride.
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61. A mirror like polymeric article having at least first and second major surfaces, said article comprising a sufficient number of alternating layers of first and second polymeric materials such that at least 30% of light incident on said article is reflected, and at least one interior light absorbing layer, a substantial majority of the individual layers of said article having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1, and wherein one of said first and second polymeric material comprises a copolymer of methyl methacrylate and vinylidene fluoride or miscible blend of polymethyl methacrylate and polyvinylidene fluoride.
- 62. A birefringent light polarizer which reflects light anisotropically, comprising multiple layers of at least first and second diverse polymeric materials, a substantial majority of the individual layers of said polarizer having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.1 in one plane of the polarizer, and wherein one of said first and second polymeric materials comprises a copolymer of methyl methacrylate and vinylidene fluoride or a miscible blend of polymethyl methacrylate and polyvinylidene fluoride.
- 64. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 30% of light incident on said body is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.03 and wherein said first polymeric material comprises polymethyl methacrylate and said second polymeric material comprises a copolymer of methyl methacrylate and vinylidene fluoride or a miscible blend of polymethyl methacrylate and polyvinylidene fluoride.
- 67. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 30% of light incident on said body is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.03 and wherein said first polymeric material comprises polyvinylidene fluoride and said second polymeric material comprises a copolymer of methyl methacrylate and vinylidene fluoride or a miscible blend of polymethyl methacrylate and polyvinylidene fluoride.
- 70. A reflective polymeric body of at least first and second diverse polymeric materials, the body comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 30% of light incident on said body is reflected, a substantial majority of the individual layers of said body having an optical thickness of not more than 0.09 micrometers or not less than 0.45 micrometers, with at least one of said individual layers having an optical thickness of not less than 0.45 micrometers, wherein said first and second polymeric materials differ from each other in refractive index by at least about 0.03 and wherein said first polymeric material comprises polymethyl methacrylate and said second polymeric material comprises a copolymer of methyl methacrylate, vinylidene fluoride, and a fluorocarbon monomer selected from the group consisting of chlorofluoroethylene, chlorodifluoroethylene, chlorotrifluoroethylene, chlorotrifluoroethylene, hexafluoroacetone, hexafluoropropylene, hexafluoropropene, pentafluoropropylene, trifluoroethylene, tetrafluoroethylene, and vinyl fluoride.
Specification