Metal complex organic dye, color photoresist composition and application thereof
阅读说明：本技术 金属络合物有机染料、彩色光阻组合物及其应用 (Metal complex organic dye, color photoresist composition and application thereof ) 是由 李颖 于 2017-07-07 设计创作，主要内容包括：本发明提供一种金属络合物有机染料、彩色光阻组合物及其应用。本发明提供的金属络合物有机染料,其分子结构含有水溶性较差的磺酸钙盐基团、磺酸钡盐基团、或磺酸镁盐基团,从而构成了金属微溶盐络合物,具备较好的耐溶剂性耐水性,且虽然溶解度降低但仍是小分子化合物,在彩色光阻组合物中不会形成晶体结构或析出形成固体颗粒,仍具有普通小分子染料高穿透和高着色能力,同时耐热稳定性有所提高,在显示装置彩膜制程的显影过程及后制程成膜过程中,很难被水及其他有机溶剂从彩色光阻中带出,能够有效改善含有Dye组分光阻所制成的彩膜浮色及后制程中发生色偏的问题,提高显示装置的显示品质。(The invention provides a metal complex organic dye, a color photoresist composition and application thereof. The molecular structure of the metal complex organic Dye provided by the invention contains a calcium sulfonate group, a barium sulfonate group or a magnesium sulfonate group with poor water solubility, so that a metal slightly soluble salt complex is formed, the metal slightly soluble salt complex has better solvent resistance and water resistance, a small molecular compound is still formed although the solubility is reduced, a crystal structure cannot be formed or solid particles cannot be precipitated in a color photoresist composition, the metal slightly soluble salt complex still has high penetration and high coloring capability of a common small molecular Dye, and meanwhile, the heat resistance stability is improved.)
1. The metal complex organic dye is characterized in that the metal complex organic dye is applied to a color photoresist, and the molecular structure of the metal complex organic dye contains a calcium sulfonate group, a barium sulfonate group or a magnesium sulfonate group;
the general formula of the molecular structure is shown as the following formula II:
wherein R1 is- (CH)2)n2CH3、-H、-F、-Cl、-Br、-OH、-NH2、-COOR、-NHR、-SO3Na、-SO2NH2、-NO2、-Ph、
A is Ca2+、Ba2Or Mg2+。
2. A color photoresist composition is characterized by comprising a coloring agent, a resin, an initiator, a monomer and a dispersing agent;
wherein the colorant comprises the metal complex organic dye of claim 1.
3. The color resist composition according to claim 2, wherein the resin comprises one or more of an acrylic resin, an epoxy resin, a polyolefin resin, a polyester resin, a phenol resin, and a urea resin.
4. A color resist obtained by using the color resist composition according to claim 2 or 3.
5. A color filter substrate, comprising a substrate base plate and the color photoresist according to claim 4 on the substrate base plate.
6. A display device comprising the color filter substrate according to claim 5.
Technical Field
The invention relates to the technical field of display, in particular to a metal complex organic dye, a color photoresist composition and application thereof.
Background
A Thin Film Transistor Liquid Crystal Display (TFT-LCD) has many advantages such as a Thin body, power saving, and no radiation, and is widely used. Most of the existing liquid crystal display devices in the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module (backlight module). Generally, a Liquid Crystal display panel is composed of a Color Filter (CF) substrate, a TFT array substrate, a Liquid Crystal (LC) and a Sealant (Sealant) sandwiched between the Color Filter substrate and the TFT array substrate; the molding process generally comprises: front Array (Array) process, CF process (film, yellow light, etching and stripping), middle Cell (TFT Array substrate and CF substrate bonding), and back Module assembly (Module) process (driving IC and printed circuit board bonding); wherein, the front-stage Array process mainly forms a TFT substrate to control the movement of liquid crystal molecules; the front CF process mainly forms a CF substrate; the middle Cell process is mainly to add liquid crystal between the TFT substrate and the CF substrate; the back module assembly process mainly drives the integration of IC pressing and printed circuit board, and further drives the liquid crystal molecules to rotate and display images.
The CF substrate is a main device used by the LCD to realize color display, and its basic constitution generally includes: a glass substrate, a Black Matrix (BM), a color filter layer, etc. The color filter layer achieves a color display effect mainly through the color photoresist, light emitted by the backlight source is modulated by liquid crystal molecules and enters the CF substrate, red (R) photoresist, green (G) photoresist and blue (B) photoresist of the color filter layer on the CF substrate are used for filtering, red, green and blue light rays are respectively displayed, and the photoresists of different colors respectively transmit light of corresponding color wave bands, so that the color display of the display is realized.
In the color filter layer, the main components of a general color resist include a colorant, an alkali-soluble resin, a polyfunctional monomer, a photoinitiator, and the like, wherein the colorant plays a role of dyeing in the color resist, and is generally an organic pigment (pigment) or a novel organic Dye (Dye). The organic pigment is the most widely applied color photoresist material in the TFT-LCD industry at present due to the characteristics of excellent sun resistance, water immersion resistance, acid resistance, alkali resistance, organic solvent resistance, heat resistance, stable crystal form, dispersibility, covering power and the like. However, in recent years, with the development of high-penetration high-contrast technology in the TFT-LCD industry, pigment-based color photoresist materials have not been able to meet the needs of the industry. Due to the small molecular structure of Dye, light scattering is not easy to occur in the photoresist material, so that the influence on the transmittance and the contrast can be reduced, and the Dye becomes a research hotspot in recent years. However, due to the small molecular structure of Dye and its high solubility in organic solvents and water, the solvent resistance and water resistance of Dye are poor, so that after exposure of a color photoresist material, Dye is easily washed away by a developing solution in a subsequent developing process; in addition, Dye may enter into the protective film in a more subsequent process of coating the protective film. Both of the above two situations can cause significant color floating, color shift and even pollution problems to the pixel unit.
Disclosure of Invention
The invention aims to provide a metal complex organic Dye, which belongs to a metal slightly soluble salt complex, has high water resistance and solvent resistance, can effectively solve the problems of color film flooding made of a photoresist containing Dye components and color cast in the subsequent process, and improves the display quality of a display device.
The invention also aims to provide a color photoresist composition, wherein the colorant comprises the metal complex organic Dye, so that the problems of color film flooding and color deviation in the subsequent process, which are produced by using the photoresist containing Dye components, can be effectively solved, and the display quality of a display device is improved.
The invention also aims to provide a color photoresist which is prepared by adopting the color photoresist composition, can effectively solve the problems of color flooding of a color film prepared by using the photoresist containing Dye components and color deviation in the subsequent process, and improves the display quality of a display device.
The invention also aims to provide a color film substrate which comprises the color photoresist, can effectively solve the problems of color film flooding made of the photoresist containing Dye components and color cast in the post-processing process, and improves the display quality of a display device.
The invention also aims to provide a display device which comprises the color film substrate, can effectively solve the problems of color film flooding made of the photoresist containing Dye components and color cast in the post-processing process, and improves the display quality of the display device.
In order to achieve the above object, the present invention provides a metal complex organic dye, which is applied to a color photoresist and has a molecular structure containing a calcium sulfonate group, a barium sulfonate group, or a magnesium sulfonate group.
Alternatively, the metal complex organic dye has a general molecular structure formula as shown in formula I:
wherein R is CH3(CH2)n1，n1<6；
A is Ca2+、Ba2+Or Mg2+。
Alternatively, the metal complex organic dye has a general molecular structure formula as shown in formula II:
wherein R1 is- (CH)2)n2CH3、-H、-F、-Cl、-Br、-OH、-NH2、-COOR、-NHR、-SO3Na、-SO2NH2、-NO2、-Ph、
A is Ca2+、Ba2Or Mg2+。
Alternatively, the metal complex organic dye has a general molecular structure formula as shown in formula III:
wherein R2 is- (CH)2)n3CH3、-H、-F、-Cl、-Br、-OH、-NH2、-COOR、-NHR、-SO3Na、-SO2NH2、-NO2、
A is Ca2+、Ba2Or Mg2+。
Alternatively, the metal complex organic dye has a general molecular structure formula as shown in formula IV below:
wherein R1 is- (CH)2)n2CH3、-H、-F、-Cl、-Br、-OH、-NH2、-COOR、-NHR、-SO3Na、-SO2NH2、-NO2、-Ph、
R2 is- (CH)2)n3CH3、-H、-F、-Cl、-Br、-OH、-NH2、-COOR、-NHR、-SO3Na、-SO2NH2、-NO2、
R3 is R1, R2,
A is Ca2+、Ba2Or Mg2+。
The invention also provides a color photoresist composition, which comprises a coloring agent, resin, an initiator, a monomer and a dispersing agent;
wherein the colorant comprises a metal complex organic dye as described above.
The resin comprises one or more of acrylic resin, epoxy resin, polyolefin resin, polyester resin, phenolic resin and urea resin.
The invention also provides a color photoresist which is obtained by adopting the color photoresist composition.
The invention also provides a color film substrate which comprises a substrate base plate and the color light resistor positioned on the substrate base plate.
The invention also provides a display device which comprises the color film substrate.
The invention has the beneficial effects that: the molecular structure of the metal complex organic Dye provided by the invention contains a calcium sulfonate group, a barium sulfonate group or a magnesium sulfonate group with poor water solubility, so that a metal slightly soluble salt complex is formed, the metal slightly soluble salt complex has better solvent resistance and water resistance, a small molecular compound is still formed although the solubility is reduced, a crystal structure cannot be formed or solid particles cannot be precipitated in a color photoresist composition, the metal slightly soluble salt complex still has high penetration and high coloring capability of a common small molecular Dye, and meanwhile, the heat resistance stability is improved. According to the color photoresist composition provided by the invention, the colorant comprises the metal complex organic Dye, so that the problems of color film flooding made of the photoresist containing Dye components and color cast in the later process can be effectively solved, and the display quality of a display device is improved. The color photoresist provided by the invention is obtained by adopting the color photoresist composition, can effectively solve the problems of color film flooding made of the photoresist containing Dye components and color cast in the post-processing process, and improves the display quality of a display device. The color film substrate provided by the invention comprises the color photoresist, so that the problems of color film flooding made of the photoresist containing Dye components and color deviation in the post-processing process can be effectively solved, and the display quality of a display device is improved. The display device comprises the color film substrate, so that the problems of color film flooding made of the photoresist containing Dye components and color deviation in the post-processing process can be effectively solved, and the display quality of the display device is improved.
Detailed Description
To further illustrate the technical means adopted by the present invention and the effects thereof, the following detailed description is given with reference to the preferred embodiments of the present invention.
The invention firstly provides a metal complex organic dye which is applied to a color photoresist and has a molecular structure containing a calcium sulfonate group, a barium sulfonate group or a magnesium sulfonate group.
The molecular structure of the metal complex organic dye contains a calcium sulfonate group, a barium sulfonate group or a magnesium sulfonate group with poor water solubility, thereby forming a metal slightly soluble salt complex, having better solvent resistance and water resistance, and being a small molecular compound although the solubility is reduced, does not form a crystal structure or precipitate to form solid particles in the color photoresist composition, thereby having better solvent resistance and water resistance of the pigment, high penetration and high coloring capability of common micromolecule dye, simultaneously improving the heat resistance stability, in the developing process of the color film process of the display device and the film forming process of the post-process, the color film is difficult to be brought out from the color photoresist by water and other organic solvents, the problems of color film flooding made of the photoresist containing Dye components and color deviation in the post-process can be effectively solved, and the display quality of the display device is improved.
Specifically, the solubility of the metal complex organic dye of the present invention can be adjusted by adjusting the contents of the calcium (Ca), magnesium (Mg), barium (Ba) salt functional groups of the sulfonic acid group.
In addition, the metal complex organic dye of the invention is prepared by introducing calcium ions (Ca) into the molecular structure of common small molecular dye2+) Magnesium ion (Mg)2+) Or barium ion (Ba)2+) The structure of the metal micro-soluble salt complex does not change the conjugation degree of the primary dye molecules, so that the absorption wavelength of the molecules does not change greatly, the chromatic light and the transmission spectrum are still determined by the structure of the coupling components in the primary dye molecules, the influence of metal ions is not obvious, and the chromatic light is deepened only by a certain color-assisting effect.
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