Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1992-03-10
1994-04-26
Morgan, Kriellion S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524145, 524161, 524166, 524394, 524396, 525185, 525201, C08K 900, C08K 542
Patent
active
053067460
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a resin composition which selectively absorbs light of the wavelength band in the vicinity of a wavelength of 580 nm and further relates to optical products thereof, such as filters, lenses and screens.
BACKGROUND OF THE INVENTION
Hitherto, some products are known, making use of the characteristic that neodymium compounds absorb light selectively in the vicinity of the wavelength of 580 nm. For example, first publication Sho 58-225148 discloses a selective light absorptive resin compound where neodymium oxide powder is dispersed in a transparent plastic base material, such as methacrylic resin, and optical products making use thereof. Furthermore, first publication Sho 60-161458 discloses neodymium-containing transparent resin compounds obtained by polymerizing a mixture of monomers such as alkyl (meth)acrylate and styrene, neodymium compounds such as neodymium acrylate, a carboxylic acid as a solvent of this neodymium compound and a polymerization initiator by the cell-cast method and optical products making use thereof.
These optical products have the characteristic of selectively absorbing light in the range of a wavelength of 580 nm, and are used in filters of color display equipment, such as color CRT, screen boards, lenses and lighting equipment.
However, the resin composition where neodymium oxide powder is dispersed in the transparent plastic base material is a disperse system of inorganic powder and therefore, there are the weak points that the transparency and light transmittance decreases, the absorption peak broadens, and further the quantity of absorbed light is small.
Since the optical products stated in first publication Sho 61-161458 are derived from a resin composition which is obtained by molecular binding a neodymium compound with, or dissolving it in a solvent and a polymer, there are changes in such properties as the mechanical characteristics of the polymer itself, and when trying to introduce a sufficient amount of neodymium compound, it brings about the inconvenience of grave deterioration of the mechanical and thermal properties of optical resin compounds and optical products.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a resin composition and an optical product making use thereof which has sharp absorption characteristics, without troubles such as a decrease in transparency and light transmittance and deterioration in the characteristics of the resin composition.
The resin composition of this invention has superior light selective functions because beads having light selective function arising from introducing a neodymium compound into a transparent polymer are dispersed in the transparent resin composition, and furthermore do not show a decrease in the characteristics of the resin composition even when the neodymium content is raised.
The resin composition of this invention has superior light selective functions because it is a resin composition where beads having light selective function arising from introducing a neodymium compound into a transparent polymer are dispersed in the transparent optical product, and furthermore does not show a decrease in the light selective function even when the neodymium content is raised.
BRIEF EXPLANATION OF THE FIGURES
FIG. 1 is a spectrum showing the spectral characteristics of a resin sheet attained by the preferred embodiment of the present invention.
FIG. 2 is a spectrum showing the spectral characteristics of a resin sheet attained by the preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, a detailed explanation on the invention is given.
The beads with light selective function used in the present invention are particles in which a neodymium compound is introduced into a transparent polymer. The particle size of these beads lies in the range of 0.01 .mu.m and 5 mm. This particle size may suitably be chosen according to the use of the beads.
The neodymium compound within the bead
REFERENCES:
patent: 4390656 (1983-06-01), Weise et al.
patent: 4471078 (1984-09-01), Ida
patent: 4548979 (1985-10-01), Weise et al.
patent: 4563494 (1986-01-01), Ida
Patent Abstracts of Japan, vol. 009, No. 309 (C-318) Dec. 15, 2985, & JP-A-60 149 615, Aug. 7, 1985, Shirakawa Hideo et al., "Production of Neodymium-Containing Monomer Composition and Production of Neodymium-Containing Transparent Resin by Polymerizing Said Monomer Composition".
Patent Abstracts of Japan, vol. 009, No. 088 (C-276) Apr. 4, 1985, & JP-A-59 217 705, Dec. 7, 1984, Uehara Hiroshi, et al., "Neodymium-Containing Transparent Resin and Its Preparation".
Ida Kozo
Suda Tetsuya
Mitsubishi Rayon Co. Ltd.
Morgan Kriellion S.
LandOfFree
Resin compositions and optical products making use thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Resin compositions and optical products making use thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resin compositions and optical products making use thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1712171