A polymer grating composition

Abstract

This invention relates to the field of materials technology, specifically to a polymer grating composition. The polymer grating composition comprises an initiator system, a non-reactive solvent system, and a high-refractive-index polymer monomer system; the initiator system includes a photosensitizer and an initiator; the high-refractive-index polymer monomer system includes low-viscosity monofunctional monomers, multifunctional monomers, and high-refractive-index polymer monomers; by mass percentage, the photosensitizer accounts for 0.1%-1%, the initiator accounts for 0.01%-2%, the non-reactive solvent system accounts for 10%-50%, the low-viscosity monofunctional monomer accounts for 0%-30%, the multifunctional monomer accounts for 10%-40%, and the high-refractive-index polymer monomer accounts for 10%-60%. The polymer grating composition of this invention increases the transmittance of the grating; the polymer grating composition of this invention is a high-efficiency composition, exhibiting high diffraction efficiency for both S-rays and P-rays; the polymer grating composition of this invention reduces the light scattering loss of the grating.

Description

Technical Field

[0001] This invention relates to the field of materials technology, and more specifically to a polymer grating composition. Background Technology

[0002] Displays, as a common technology in daily life, are widely used in various scenarios. Materials, as the most fundamental and crucial elements in displays and optics, have their refractive indexes studied in depth to realize the functions of display and optical components and meet people's higher requirements for displays.

[0003] Optical elements such as gratings are used as 2D and 3D electronic lenses, which require a sufficiently fast response speed and a sufficiently small driving voltage. The polymer grating compositions used to prepare optical elements require a sufficiently high light efficiency, high light diffraction efficiency, and fast response.

[0004] However, existing holographic polymer-dispersed liquid crystal grating technology suffers from high diffraction efficiency (over 90%) for P-beams and extremely low diffraction efficiency (below 20%) for S-beams because the liquid crystals are oriented along the grating vector direction during grating formation. As a result, when this grating is applied to waveguides, it directly results in a 50% loss of luminous efficiency for existing unpolarized light sources (OLEDs and LEDs), greatly hindering the application of holographic polymer-dispersed liquid crystal gratings and volume holographic grating waveguides.

[0005] Therefore, developing a polymer grating composition with high diffraction efficiency for both P-beams and S-beams is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to at least solve one of the technical problems existing in the prior art and to provide a novel device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a polymer grating composition comprising an initiator system, a non-reactive solvent system, and a high-refractive-index polymer monomer system;

[0008] The initiator system includes a photosensitizer and an initiator;

[0009] The high-refractive-index polymer monomer system includes low-viscosity monofunctional monomers, multifunctional monomers, and high-refractive-index polymer monomers.

[0010] By mass percentage, the photosensitizer accounts for 0.1%-1%, the initiator accounts for 0.01%-2%, the non-reactive solvent system accounts for 10%-50%, the low-viscosity monofunctional monomer accounts for 0%-30%, the polyfunctional monomer accounts for 10%-40%, and the high-refractive-index polymer monomer accounts for 10%-60%.

[0011] Furthermore, the high refractive index polymer monomer includes at least one of acrylic compounds, epoxy reactive molecular compounds, and reactive nano-metal oxides.

[0012] Furthermore, the high refractive index polymer monomer includes at least one compound of the following general formula:

[0013] Compounds of general formula 1:

[0014]

[0015] Where R represents H or CH3, and n takes any value from 1 to 10;

[0016] Compounds of general formula 2:

[0017]

[0018] Where n takes any value from 1 to 10;

[0019] Compounds of general formula 3:

[0020]

[0021] Where R represents H or CH3, and n takes any value from 1 to 10;

[0022] Compounds of general formula 4:

[0023]

[0024] Where n takes any value from 1 to 10;

[0025] Compounds of general formula 5:

[0026]

[0027] Where R represents H or CH3, each X1, X2, X3 and X4 is independently selected from any one of Br, I, CI, F and H, and n1 takes any value from 1 to 8;

[0028] Compounds of general formula 6:

[0029]

[0030] Each of X1, X2, X3 and X4 is independently selected from Br, I, CI, F and H, and n1 takes any value from 1 to 8.

[0031] Compounds of general formula 7:

[0032]

[0033] Each Z1 and Z2 is independently selected from S and O, each R is independently selected from H and CH3, and each n2 is independently selected from any value from 1 to 5.

[0034] Compounds of general formula 8:

[0035]

[0036] Each Z1 and Z2 is independently selected from either S or O, and each n2 is independently selected from any value from 1 to 5.

[0037] Compounds of general formula 9:

[0038]

[0039] Wherein, Y is selected from any one of F, CN and NCS, R is selected from any one of H and CH3, R1 is selected from any one of CI, Br and CH3, and n is selected from any value from 1 to 10;

[0040] Compounds of general formula 10:

[0041]

[0042] Where Y is selected from any one of F, CN and NCS, R1 is selected from any one of CI, Br and CH3, and n is selected from any value from 1 to 10;

[0043] Compounds of general formula 11:

[0044]

[0045] Among them, Z3 and Z4 can be independently selected from either S or O, R is selected from either H or CH3, and n2 is selected from any value from 1 to 5;

[0046] Compounds of general formula 12:

[0047]

[0048] Among them, Z3 and Z4 can be independently selected from either S or O, and n2 is selected from any value from 1 to 5;

[0049] Compounds of general formula 13:

[0050]

[0051] Where R is selected from either H or CH3, and M is a nano-metal or a metal oxide.

[0052] Compounds of general formula 14:

[0053]

[0054] Where M is a nano-metal or metal oxide;

[0055] Compounds of general formula 15:

[0056]

[0057] Among them, R is selected from either H or CH3, X5, X6 and X7 can be independently selected from either F, Cl, Br and I; n3 is selected from any value from 1 to 5.

[0058] Furthermore, the compound of general formula 1 includes at least one of the compounds of general formula 1-1 and general formula 1-2;

[0059] The compound of general formula 1-1 is:

[0060]

[0061] The compounds of general formula 1-2 are:

[0062]

[0063] The compound of general formula 5 includes at least one of the compounds of general formula 5-1, general formula 5-2, general formula 5-3, and general formula 5-4;

[0064] The compound of general formula 5-1 is:

[0065]

[0066] The compound of general formula 5-2 is:

[0067]

[0068] The compound of general formula 5-3 is:

[0069]

[0070] The compound of general formula 5-4 is:

[0071]

[0072] The compound of general formula 7 includes at least one of the compounds of general formula 7-1 and general formula 7-2; the compound of general formula 7-1 is:

[0073]

[0074] The compound of general formula 7-2 is:

[0075]

[0076] The compound of general formula 9 includes at least one of the compounds of general formula 9-1 and general formula 9-2; the compound of general formula 9-1 is:

[0077]

[0078] The compound of general formula 9-2 is:

[0079]

[0080] The compound of general formula 11 includes at least one of the compounds of general formula 11-1 and general formula 11-2; the compound of general formula 11-1 is:

[0081]

[0082] The compound of general formula 11-2 is:

[0083]

[0084] The compound of general formula 13 includes the compound of general formula 13-1;

[0085] The compound of general formula 13-1 is:

[0086]

[0087] The compound of general formula 15 includes at least one of the compounds of general formula 15-1 and general formula 15-2; the compound of general formula 15-1 is:

[0088]

[0089] The compound of general formula 15-2 is:

[0090]

[0091] Furthermore, the photosensitizer includes at least one of Irgacure 784, Bengal rose ester, Bengal rose sodium salt, eosin, eosin sodium salt, camphorquinone, fluorescein diacetate, methylene blue, erythrosine B, methylene blue, and anthocyanin dye.

[0092] Furthermore, the photoinitiator includes at least one of N-phenylglycine (NPG), triethanolamine, triphenylborate, and iodonium salt.

[0093] Furthermore, the non-reactive solvent system includes solvent A with a refractive index lower than 1.45 and / or solvent B with a refractive index lower than 1.4;

[0094] Solvent A includes at least one of N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethylisobutylamine, N,N-dimethylbutyramide, N-methylcaprolactam, 2-bromo-N,N-dimethylbutyramide, N-methylpyrrolidone, 1-cyclohexyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, diethylacetamide, N,N-diethylisobutylamine, N,N-diethylbutyramide, N-ethylcaprolactam, 2-bromo-N,N-diethylbutyramide, isopropanol, ethanol, ethylene glycol, acetonitrile, alkanes, and acetates.

[0095] Solvent B includes any one of ethyl fluoroacetate, ethyl difluoroacetate, ethyl trifluoroacetate, ethyl 4,4,4-trifluoroacetoacetate, ethyl pentafluoropropionyl acetate, ethyl difluorochloroacetate, and methyl 2,2-difluoro-2-(fluorosulfonyl)acetate.

[0096] Furthermore, the low-viscosity monofunctional monomer includes acrylic and / or epoxy monomers;

[0097] Specifically, it includes at least one of the following: ethoxyphenoxy acrylate, dicyclopentenyl acrylate, dicyclopentenyl ethoxy acrylate, ethoxyphenoxy acrylate, m-phenoxybenzyl acrylate, 2-phenoxyethyl methacrylate, 2-phenoxyethyl acrylate, N-vinyl-2-pyrrolidone and other acrylic monomers, glycidyl tert-carbonate, 3,3'-[oxybismethylene]bis[3-ethyl]oxetane, epoxy acrolein diethanoloxide, (2,3-epoxypropyl)benzene and benzyl glycidyl ether.

[0098] Furthermore, the multifunctional monomers include epoxy monomers and / or acrylic monomers;

[0099] Specifically, it includes at least one of the following: bisphenol A diglycidyl ether (BADGE), bisphenol A diacrylate ethoxylate, polythiol epoxy resin, tricyclodecanediethanol dimethacrylate, ethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tri, tetra, and pentaacrylates, dipentaerythritol hexaacrylate, and Changxing 6361-100.

[0100] As can be seen from the above description of the present invention, compared with the prior art, the polymer grating composition of the present invention has at least one of the following beneficial effects:

[0101] 1. The polymer grating composition of the present invention increases the light transmittance of the grating;

[0102] 2. The polymer grating composition of the present invention is a high-efficiency composition, which has high diffraction efficiency for both S-rays and P-rays;

[0103] 3. The polymer grating composition of the present invention reduces the light scattering loss of the grating. Detailed Implementation

[0104] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0105] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0107] A polymer grating composition comprising an initiator system, a non-reactive solvent system, and a high-refractive-index polymer monomer system; The initiator system includes a photosensitizer and an initiator; The high-refractive-index polymer monomer system includes low-viscosity monofunctional monomers, multifunctional monomers, and high-refractive-index polymer monomers. By mass percentage, the photosensitizer accounts for 0.1%-1%, the initiator accounts for 0.01%-2%, the non-reactive solvent system accounts for 10%-50%, the low-viscosity monofunctional monomer accounts for 0%-30%, the polyfunctional monomer accounts for 10%-40%, and the high-refractive-index polymer monomer accounts for 10%-60%.

[0111] Among them, the initiator system can be activated by photochemical radiation and initiate the polymerization reaction of the corresponding polymerizable groups.

[0112] The proportion of non-reactive solvent is 10-50%, which takes into account phase separation and grating stability. If the solvent content is high and the polymer content is low, phase separation will be difficult, and the grating may be unstable, meaning that the diffraction efficiency will decrease over time. If the solvent content is too low, the solvent will be encapsulated by the polymer during the reaction, and the solvent will not have time to diffuse, which will also lead to phase separation difficulties and low diffraction efficiency.

[0113] The content of low-viscosity monofunctional monomers ranges from 0% to 30%, which is intended to adjust the viscosity of the polymer and its solubility in the solvent, control the reaction rate during polymerization, and thus control phase separation.

[0114] Among them, the content of multifunctional monomers is 10%-40%, which is to improve the refractive index modulation, that is, to improve the diffraction efficiency.

[0115] The high-refractive-index polymer monomer content is 10%-60% to ensure that the obtained polymer has a high refractive index, so that the polymer and the solvent have a larger refractive index difference Δn, thereby achieving higher diffraction efficiency.

[0116] The polymer grating composition of the present invention increases the transmittance of the grating; the polymer grating composition of the present invention is a high-efficiency composition with high diffraction efficiency for both S-beams and P-beams; the polymer grating composition of the present invention reduces the light scattering loss of the grating.

[0117] In this embodiment, the high refractive index polymer monomer includes at least one of acrylic compounds, reactive epoxy molecular compounds, and reactive nano-metal oxides.

[0118] In this embodiment, the high refractive index polymer monomer includes at least one of the following general formula compounds:

[0119] Compounds of general formula 1:

[0120]

[0121] Where R represents H or CH3, and n takes any value from 1 to 10;

[0122] Compounds of general formula 2:

[0123]

[0124] Where n takes any value from 1 to 10;

[0125] Compounds of general formula 3:

[0126]

[0127] Where R represents H or CH3, and n takes any value from 1 to 10;

[0128] Compounds of general formula 4:

[0129]

[0130] Where n takes any value from 1 to 10;

[0131] Compounds of general formula 5:

[0132]

[0133] Where R represents H or CH3, each X1, X2, X3 and X4 is independently selected from any one of Br, I, CI, F and H, and n1 takes any value from 1 to 8;

[0134] Compounds of general formula 6:

[0135]

[0136] Each of X1, X2, X3 and X4 is independently selected from Br, I, CI, F and H, and n1 takes any value from 1 to 8.

[0137] Compounds of general formula 7:

[0138]

[0139] Each Z1 and Z2 is independently selected from S and O, each R is independently selected from H and CH3, and each n2 is independently selected from any value from 1 to 5.

[0140] Compounds of general formula 8:

[0141]

[0142] Each Z1 and Z2 is independently selected from either S or O, and each n2 is independently selected from any value from 1 to 5.

[0143] Compounds of general formula 9:

[0144]

[0145] Wherein, Y is selected from any one of F, CN and NCS, R is selected from any one of H and CH3, R1 is selected from any one of CI, Br and CH3, and n is selected from any value from 1 to 10;

[0146] Compounds of general formula 10:

[0147]

[0148] Where Y is selected from any one of F, CN and NCS, R1 is selected from any one of CI, Br and CH3, and n is selected from any value from 1 to 10;

[0149] Compounds of general formula 11:

[0150]

[0151] Among them, Z3 and Z4 can be independently selected from either S or O, R is selected from either H or CH3, and n2 is selected from any value from 1 to 5;

[0152] Compounds of general formula 12:

[0153]

[0154] Among them, Z3 and Z4 can be independently selected from either S or O, and n2 is selected from any value from 1 to 5;

[0155] Compounds of general formula 13:

[0156]

[0157] Where R is selected from either H or CH3, and M is a nano-metal or a metal oxide.

[0158] Compounds of general formula 14:

[0159]

[0160] Where M is a nano-metal or metal oxide;

[0161] Compounds of general formula 15:

[0162]

[0163] Among them, R is selected from either H or CH3, X5, X6 and X7 can be independently selected from either F, Cl, Br and I; n3 is selected from any value from 1 to 5.

[0164] In this embodiment, the compound of general formula 1 includes at least one of the compounds of general formula 1-1 and general formula 1-2;

[0165] The compound of general formula 1-1 is:

[0166]

[0167] The compounds of general formula 1-2 are:

[0168]

[0169] The compound of general formula 5 includes at least one of the compounds of general formula 5-1, general formula 5-2, general formula 5-3, and general formula 5-4;

[0170] The compound of general formula 5-1 is:

[0171]

[0172] The compound of general formula 5-2 is:

[0173]

[0174] The compound of general formula 5-3 is:

[0175]

[0176] The compound of general formula 5-4 is:

[0177]

[0178] The compound of general formula 7 includes at least one of the compounds of general formula 7-1 and general formula 7-2; the compound of general formula 7-1 is:

[0179]

[0180] The compound of general formula 7-2 is:

[0181]

[0182] The compound of general formula 9 includes at least one of the compounds of general formula 9-1 and general formula 9-2; the compound of general formula 9-1 is:

[0183]

[0184] The compound of general formula 9-2 is:

[0185]

[0186] The compound of general formula 11 includes at least one of the compounds of general formula 11-1 and general formula 11-2; the compound of general formula 11-1 is:

[0187]

[0188] The compound of general formula 11-2 is:

[0189]

[0190] The compound of general formula 13 includes the compound of general formula 13-1;

[0191] The compound of general formula 13-1 is:

[0192]

[0193] The compound of general formula 15 includes at least one of the compounds of general formula 15-1 and general formula 15-2;

[0194] The compound of general formula 15-1 is:

[0195]

[0196] The compound of general formula 15-2 is:

[0197]

[0198] In this embodiment, the photosensitizer includes at least one of Irgacure 784, Bengal rose ester, Bengal rose sodium salt, eosin, eosin sodium salt, camphorquinone, fluorescein diacetate, methylene blue, erythrosine B, methylene blue, and anthocyanin dye.

[0199] In this embodiment, the photoinitiator includes at least one of N-phenylglycine (NPG), triethanolamine, triphenylborate, and iodonium salt.

[0200] In this embodiment, the non-reactive solvent system includes solvent A with a refractive index lower than 1.45 and / or solvent B with a refractive index lower than 1.4;

[0201] Solvent A includes at least one of N,N-dimethylacetamide, N,N-dimethylisobutylamine, N,N-dimethylbutyramide, N-methylcaprolactam, 2-bromo-N,N-dimethylbutyramide, N-methylpyrrolidone, 1-cyclohexyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, diethylacetamide, N,N-diethylisobutylamine, N,N-diethylbutyramide, N-ethylcaprolactam, 2-bromo-N,N-diethylbutyramide, isopropanol, ethanol, ethylene glycol, acetonitrile, alkanes, and acetates.

[0202] The purpose of solvent A is to improve the mixing uniformity of the mixture and increase the degree of phase separation.

[0203] Solvent B includes any one of ethyl fluoroacetate, ethyl difluoroacetate, ethyl trifluoroacetate, ethyl 4,4,4-trifluoroacetoacetate, ethyl pentafluoropropionyl acetate, ethyl difluorochloroacetate, and methyl 2,2-difluoro-2-(fluorosulfonyl)acetate.

[0204] The purpose of solvent B is to minimize the refractive index of the non-reactive solvent, improve the diffraction efficiency of the volume holographic grating, and promote a high refractive index modulation, which can also facilitate phase separation.

[0205] In this embodiment, the low-viscosity monofunctional monomer includes acrylic and / or epoxy monomers;

[0206] Specifically, it includes at least one of the following: ethoxyphenoxy acrylate, dicyclopentenyl acrylate, dicyclopentenyl ethoxy acrylate, ethoxyphenoxy acrylate, m-phenoxybenzyl acrylate, 2-phenoxyethyl methacrylate, 2-phenoxyethyl acrylate, N-vinyl-2-pyrrolidone and other acrylic monomers, glycidyl tert-carbonate, 3,3'-[oxybismethylene]bis[3-ethyl]oxetane, epoxy acrolein diethanoloxide, (2,3-epoxypropyl)benzene and benzyl glycidyl ether.

[0207] Specifically, monofunctional monomers can be selected to cooperate with the polymerization reaction of photopolymer monomers with a refractive index greater than 1.6. Since monofunctional monomers have a high refractive index or strong polarity, they can achieve the purpose of dissolving photoinitiators and at the same time increase the refractive index of the polymer.

[0208] In this embodiment, the multifunctional monomer includes epoxy monomers and / or acrylic monomers;

[0209] Specifically, it includes at least one of the following: bisphenol A diglycidyl ether (BADGE), bisphenol A diacrylate ethoxylate, polythiol epoxy resin, tricyclodecanediethanol dimethacrylate, ethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tri, tetra, and pentaacrylates, dipentaerythritol hexaacrylate, and Changxing 6361-100.

[0210] Specifically, multifunctional monomers can be selected to cooperate with the polymerization reaction of photopolymer monomers with a refractive index greater than 1.6. Since multifunctional monomers have strong activity, they can increase the strength of the polymer, improve the diffraction efficiency of the volume holographic grating, and promote the acquisition of high refractive index modulation. Specific Implementation Example 1:

[0212] Table 1 shows the composition and proportions of the polymer grating composition in Example 1:

[0213] Table 1

[0214] Raw material Content (by weight fraction) N-phenylglycine NPG 0.5 Bengal rose ester 0.1 Compound of general formula 5-3 30 Compound of general formula 9-2 11.4 Compound of general formula 15-1 10 Changxing 6361-100 8 Dipentaerythritol hexaacrylate 5 N-vinyl-2-pyrrolidone 7 N,N-dimethylformamide 18 Pentafluoropropionyl ethyl acetate 10

[0215] The free radical photopolymerization compounds in this embodiment include dipentaerythritol hexaacrylate, Changxing 6361-100, and compounds of general formula 5-3, general formula 9-2, and general formula 15-1 with high refractive indices; the chain extender monomer includes N-vinyl-2-pyrrolidone; the photosensitizer is Bengal rose red ester, and the free radical initiator is N-phenylglycine NPG; the solvent includes N,N-dimethylformamide and ethyl pentafluoropropionyl ester; by mixing the above proportions, the polymer can obtain a high refractive index of about 1.64; the solvent can have a low refractive index of about 1.40. Specific Implementation Example 2:

[0217] Table 2 shows the composition and proportions of the polymer grating composition in Example 2:

[0218] Table 2

[0219]

[0220]

[0221] The free radical photopolymerization compounds in this embodiment include dipentaerythritol hexaacrylate, Changxing 6361-100, and high-refractive-index compounds of general formula 5-3, general formula 11-1, and general formula 15-1; the chain extender monomer includes N-vinyl-2-pyrrolidone; the photosensitizer is Bengal rose red ester; the free radical initiator is N-phenylglycine NPG; and the solvents are N,N-dimethylformamide and ethyl pentafluoropropionyl ester. By mixing these proportions, the polymer can achieve a high refractive index of approximately 1.63; the solvent can have a lower refractive index of approximately 1.41.

[0222] Comparative Example 1 of the prior art:

[0223] Table 3 shows the composition and proportions of the polymer grating composition in Comparative Example 1:

[0224] Table 3

[0225] Raw material Content (by weight fraction) Initiator 784 0.5 N-phenylglycine NPG 0.5 Bengal rose ester 0.1 Bisphenyl iodonium salt 1 Changxing 6361-100 15 Hydroxyethyl methacrylate 10 Dipentaerythritol acrylate 12.9 N-vinyl-2-pyrrolidone 30 Polymer grating composition E7 30

[0226] The raw materials of the polymer grating compositions of the three examples described above were placed in a sample vial and magnetically stirred at 20°C for 30 minutes to mix thoroughly. The mixture was then poured into a 7µm empty container, and a laser with a wavelength of 532nm and an intensity of 3.5mW / cm² was used. 2 The grating was exposed to coherent laser light for 0.5 min, then bleached with 395 nm ultraviolet light to obtain the holographic grating. The diffraction efficiency is calculated as diffracted light intensity / total light intensity. Table 4 compares the diffraction efficiencies of the three examples.

[0227] Table 4

[0228] Sample name P light diffraction efficiency S light diffraction efficiency Comparative example 1 90.57％ 9.84％ Example 1 71.30％ 80.10％ Example 2 68.00％ 85.90％

[0229] In a 7µm thick grating, compared to the existing technology, Comparative Example 1 has a higher P-light diffraction efficiency but an extremely low S-light diffraction efficiency; Examples 1 and 2 of the present invention can achieve high diffraction efficiencies for both P and S-light, which can make the light source more efficient.

[0230] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A polymer grating composition, characterized in that, This includes initiator systems, non-reactive solvent systems, and high-refractive-index polymer monomer systems; The initiator system includes a photosensitizer and an initiator; The high-refractive-index polymer monomer system includes low-viscosity monofunctional monomers, multifunctional monomers, and high-refractive-index polymer monomers. By mass percentage, the photosensitizer accounts for 0.1%-1%, the initiator accounts for 0.01%-2%, the non-reactive solvent system accounts for 10%-50%, the low-viscosity monofunctional monomer accounts for 0%-30%, the polyfunctional monomer accounts for 10%-40%, and the high-refractive-index polymer monomer accounts for 10%-60%.

2. The polymer grating composition according to claim 1, characterized in that, The high refractive index polymer monomer includes at least one of acrylic compounds, epoxy reactive molecular compounds, and reactive nano-metal oxides.

3. The polymer grating composition according to claim 1, characterized in that, The high refractive index polymer monomer includes at least one compound of the following general formula: Compounds of general formula 1: Where R represents H or CH3, and n takes any value from 1 to 10; Compounds of general formula 2: Where n takes any value from 1 to 10; Compounds of general formula 3: Where R represents H or CH3, and n takes any value from 1 to 10; Compounds of general formula 4: Where n takes any value from 1 to 10; Compounds of general formula 5: Where R represents H or CH3, each X1, X2, X3 and X4 is independently selected from any one of Br, I, CI, F and H, and n1 takes any value from 1 to 8; Compounds of general formula 6: Each of X1, X2, X3 and X4 is independently selected from Br, I, CI, F and H, and n1 takes any value from 1 to 8. Compounds of general formula 7: Each Z1 and Z2 is independently selected from S and O, each R is independently selected from H and CH3, and each n2 is independently selected from any value from 1 to 5. Compounds of general formula 8: Each Z1 and Z2 is independently selected from either S or O, and each n2 is independently selected from any value from 1 to 5. Compounds of general formula 9: Wherein, Y is selected from any one of F, CN and NCS, R is selected from any one of H and CH3, R1 is selected from any one of CI, Br and CH3, and n is selected from any value from 1 to 10; Compounds of general formula 10: Where Y is selected from any one of F, CN and NCS, R1 is selected from any one of CI, Br and CH3, and n is selected from any value from 1 to 10; Compounds of general formula 11: Among them, Z3 and Z4 can be independently selected from either S or O, R is selected from either H or CH3, and n2 is selected from any value from 1 to 5; Compounds of general formula 12: Among them, Z3 and Z4 can be independently selected from either S or O, and n2 is selected from any value from 1 to 5; Compounds of general formula 13: Where R is selected from either H or CH3, and M is a nano-metal or a metal oxide. Compounds of general formula 14: Where M is a nano-metal or metal oxide; Compounds of general formula 15: Among them, R is selected from either H or CH3, X5, X6 and X7 can be independently selected from either F, Cl, Br and I; n3 is selected from any value from 1 to 5.

4. The polymer grating composition according to claim 3, characterized in that, The compound of general formula 1 includes at least one of the compounds of general formula 1-1 and general formula 1-2; The compound of general formula 1-1 is: The compounds of general formula 1-2 are: The compound of general formula 5 includes at least one of the compounds of general formula 5-1, general formula 5-2, general formula 5-3, and general formula 5-4; The compound of general formula 5-1 is: The compound of general formula 5-2 is: The compound of general formula 5-3 is: The compound of general formula 5-4 is: The compound of general formula 7 includes at least one of the compounds of general formula 7-1 and general formula 7-2; the compound of general formula 7-1 is: The compound of general formula 7-2 is: The compound of general formula 9 includes at least one of the compounds of general formula 9-1 and general formula 9-2; the compound of general formula 9-1 is: The compound of general formula 9-2 is: The compound of general formula 11 includes at least one of the compounds of general formula 11-1 and general formula 11-2; the compound of general formula 11-1 is: The compound of general formula 11-2 is: The compound of general formula 13 includes the compound of general formula 13-1; The compound of general formula 13-1 is: The compound of general formula 15 includes at least one of the compounds of general formula 15-1 and general formula 15-2; The compound of general formula 15-1 is: The compound of general formula 15-2 is:

5. The polymer grating composition according to claim 1, characterized in that, The photosensitizer includes at least one of Irgacure 784, Bengal rose ester, Bengal rose sodium salt, eosin, eosin sodium salt, camphorquinone, fluorescein diacetate, methylene blue, erythrosine B, methylene blue, and anthocyanin dye.

6. The polymer grating composition according to claim 1, characterized in that, The photoinitiator includes at least one of N-phenylglycine (NPG), triethanolamine, triphenylborate, and iodonium salt.

7. The polymer grating composition according to claim 1, characterized in that, The non-reactive solvent system includes solvent A with a refractive index lower than 1.45 and / or solvent B with a refractive index lower than 1.4; Solvent A includes at least one of N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethylisobutylamine, N,N-dimethylbutyramide, N-methylcaprolactam, 2-bromo-N,N-dimethylbutyramide, N-methylpyrrolidone, 1-cyclohexyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, diethylacetamide, N,N-diethylisobutylamine, N,N-diethylbutyramide, N-ethylcaprolactam, 2-bromo-N,N-diethylbutyramide, isopropanol, ethanol, ethylene glycol, acetonitrile, alkanes, and acetates. Solvent B includes any one of ethyl fluoroacetate, ethyl difluoroacetate, ethyl trifluoroacetate, ethyl 4,4,4-trifluoroacetoacetate, ethyl pentafluoropropionyl acetate, ethyl difluorochloroacetate, and methyl 2,2-difluoro-2-(fluorosulfonyl)acetate.

8. The polymer grating composition according to claim 1, characterized in that, The low-viscosity monofunctional monomers include acrylic and / or epoxy monomers; Specifically, it includes at least one of the following: ethoxyphenoxy acrylate, dicyclopentenyl acrylate, dicyclopentenyl ethoxy acrylate, ethoxyphenoxy acrylate, m-phenoxybenzyl acrylate, 2-phenoxyethyl methacrylate, 2-phenoxyethyl acrylate, N-vinyl-2-pyrrolidone and other acrylic monomers, glycidyl tert-carbonate, 3,3'-[oxybismethylene]bis[3-ethyl]oxetane, epoxy acrolein diethanoloxide, (2,3-epoxypropyl)benzene and benzyl glycidyl ether.

9. The polymer grating composition according to claim 1, characterized in that, The multifunctional monomers include epoxy monomers and / or acrylic monomers; Specifically, it includes at least one of the following: bisphenol A diglycidyl ether (BADGE), bisphenol A diacrylate ethoxylate, polythiol epoxy resin, tricyclodecanediethanol dimethacrylate, ethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tri, tetra, and pentaacrylates, dipentaerythritol hexaacrylate, and Changxing 6361-100.

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