KR101166183B1 - Pigment dispersion composite with excellent solvent resistance for color filter and its manufacturing method - Google Patents

Abstract

The present invention relates to a pigment dispersion composition for color filters having excellent chemical resistance and a method for producing the same, and more particularly to a pigment dispersion composition for color filters comprising an acrylic binder, a dispersant, a pigment and a solvent. Is a (meth) acrylic binder having a glycidyl group (epoxy) and an acrylic binder mixture having a tetrahydrofurfurfuryl group (tetrahydrofurfuryl), and by adjusting the dispersion temperature during the preparation of the pigment dispersion composition so that their physical properties are not modified It is about the method of adjustment.
According to the present invention, by using an acrylic dispersion binder having a glycidyl group and a THF group, it is possible to prepare a pigment dispersion composition with improved chemical resistance compared to the conventional, especially when applied to a zinc phthalocyanine pigment having a weak chemical resistance Excellent color reproducibility and chemical resistance can be shown to contribute to the performance improvement of color filter photosensitizer.

Description

Pigment dispersion composition for color filter excellent in chemical resistance and its manufacturing method {Pigment dispersion composite with excellent solvent resistance for color filter and its manufacturing method}

The present invention relates to a pigment dispersion composition for color filters and a method for producing the same, which improves the weak chemical resistance peculiar to pigments while maintaining physical properties equivalent to those of the prior art.

The method of manufacturing a TFT-LCD color filter photoresist, which has been conventionally used, can be classified into a pigment dispersion method, a dyeing method, a printing method, and the like. Among them, a method using a pigment dispersion method is most actively used.

The pigment dispersion method is a method for producing a color filter photosensitive agent with a pigment composition obtained by dispersing a pigment in a solvent, the most important thing in the preparation of the composition by the pigment dispersion method is to keep the pigment particles fine and stable.

On the other hand, the pigment dispersion composition is usually composed of a pigment, a dispersant, a dispersion binder (binder), a dispersing aid, a solvent and the like as a main component, the pigment determines the color characteristics in the color filter photosensitive agent, the remaining dispersant, dispersing binder and the like It will have a big impact on stability and fairness.

Chemical resistance of the pigment dispersion composition to process solvents such as n-methyl-2 pyrrolidone (NMP) and isopropyl alcohol (IPA) used in the color filter manufacturing process This is to some extent affected, but in the prior art, the use of a transparent protective overcoat on the color filter and the photopolymerization composition of the color filter sensitizer have been improved, but the overcoat is omitted due to slimming and high performance of the TFT-LCD and the photopolymerization composition. It has reached the limit of improving physical properties.

The present invention has been made in order to solve the problem that the conventional pigment dispersion composition is weak chemical resistance, as an acrylic dispersion binder and an acrylic binder having a glycidyl group (epoxy) and tetrahydrofurfuryl group (tetrahydrofurfuryl) It is an object of the present invention to provide a pigment dispersion composition for a color filter and a method for producing the same, which can improve the chemical resistance by using an acrylic binder having a mixture and contribute to the performance improvement in a color filter photoresist.

As an example for achieving the above object, the pigment dispersion composition for color filters of the present invention comprises an acrylic binder, a dispersant, a pigment and a solvent, wherein the acrylic binder is a glycidyl group (epoxy). It is characterized in that it is an acrylic binder mixture having a (meth) acrylic binder having a) and a tetrahydrofurfuryl group (tetrahydrofurfuryl).

As another example for achieving the above object, the method for producing a pigment dispersion composition for color filters of the present invention is a method for producing a pigment dispersion composition for color filters comprising an acrylic binder, a dispersant, a pigment and a solvent, 1) Mixing a dispersant, a pigment, and a solvent; 2) adding a (meth) acrylic binder having a glycidyl group (epoxy) and an acrylic binder mixture having a tetrahydrofurfurfuryl group (tetrahydrofurfurfuryl) as an acrylic binder to the result of step 1). Adding and mixing at high speed, 3) stabilizing the product of step 2) at room temperature for 10 to 15 hours, and 4) dispersing the product of step 3) first and then dispersing at 5 to 15 ° C. And 5) stabilizing the product of 4) at room temperature for 24 to 60 hours.

First, the pigment dispersion composition for color filters (hereinafter referred to as "pigment dispersion composition") excellent in chemical resistance of the present invention will be described in detail for each component.

Among the pigment dispersion compositions used as photosensitive agents for color filters, the structure of pigments, dispersants and dispersion binders has the greatest effect on chemical resistance.

The present invention uses an acrylic dispersion binder, in particular a (meth) acrylic dispersion binder containing a glycidyl (epoxy) group and an acrylic dispersion binder containing a tetrahydrofurfuryl group (tetrahydrofurfuryl (THF)).

As the (meth) acrylic-based dispersion binder including glycidyl (epoxy) group, glycidyl group (epoxy) content in the polymer may be used in the range of 1 to 30 mol%, preferably 3 to 20 mol%. At this time, when the glycidyl group (epoxy) content in the polymer is less than the above range, it is difficult to achieve the desired chemical resistance, and when the glycidyl group (epoxy) content in the polymer exceeds the above range, the stability of the pigment dispersion composition is lowered. You can. The (meth) acrylic dispersion binder including the glycidyl (epoxy) group may have a weight average molecular weight (Mw) in the range of 5,000 to 100,000, preferably 10,000 to 50,000. At this time, when the weight average molecular weight of the polymer is less than the above range, when applied to the color filter manufacturing process, the solubility in the alkaline developer tends to be lowered, and when the weight average molecular weight of the polymer is more than the above range, preparation of the pigment dispersion composition It tends to adversely affect the miniaturization of dispersed particles. The (meth) acrylic-based dispersion binder containing glycidyl (epoxy) group is preferably used in the range of acid value 50 to 150 mg / KOH in terms of solubility in the alkaline developer.

As the acrylic dispersion binder including the tetrahydrofurfuryl group (hereinafter referred to as “THF”), a THF group content in the polymer may be used in a range of 1 to 20 mol%, preferably 5 to 10 mol%. At this time, when the THF group content in the polymer is less than the above range, the steric hindrance effect affecting the stability of the dispersed pigment particles may be reduced, leading to a decrease in dispersibility. When the THF group content exceeds the above range, the glass substrate may be applied when the color filter is applied. The adhesiveness with and too high tends to bring about a fall of processability. The acrylic binder having the THF group may be used in the weight average molecular weight range of 3,000 to 30,000, preferably 5,000 to 20,000. At this time, if the weight average molecular weight of the polymer is less than the above range, there is a tendency that the pigment dispersion composition does not have a sufficient influence on the dispersibility, and if the weight average molecular weight of the polymer is more than the above range, the viscosity increases excessively during dispersion and the dispersion This tends to be difficult and the processability at the time of manufacturing a color filter falls. As the acrylic dispersion binder having the THF group, an acid value of 80 to 150 mg / KOH is preferably used in view of solubility in an alkaline developer.

The (meth) acrylic binder having glycidyl group (epoxy) and the acrylic binder mixture having tetrahydrofurfurfuryl group may be in the range of 0.1 to 50% by weight, preferably 1 to 20% by weight, in the pigment dispersion composition. Can be used. At this time, when the content of the acrylic binder mixture is less than the above range, it tends not to affect the micronization effect of the pigment during dispersion, and in many cases, the compatibility with the dispersant is lowered, and there is a problem in dispersion stability. Since the dispersion tends to be difficult to disperse, it is preferable to adjust the content of the acrylic binder mixture in the above range in view of dispersibility and stability improvement due to miniaturization of the pigment composition.

In particular, the (meth) acrylic binder having a glycidyl group (epoxy) is 0.05 to 10% by weight, the acrylic binder having a tetrahydrofurfurfuryl group (tetrahydrofurfurfuryl) is preferably included in the range of 0.05 to 40% by weight, If the content of the (meth) acrylic binder having an epoxy group is high, the dispersion stability of the pigment dispersed particles tends to be lowered. If the content of the acrylic binder having a THF group is high, the fineness limit of the pigment dispersed particles and the microdispersion pigment macroparticles are high. Since it tends to be difficult to control, it is preferable to adjust the content thereof.

Dispersant used in the pigment dispersion composition of the present invention is used for even dispersion of the components constituting the pigment dispersion composition in addition to the acrylic binder, has a solubility with respect to a solvent generally used in the art, What has compatibility with the acrylic dispersion binder and the pigment to be used can be used. As the commercially available dispersant, dispersants such as polyacrylic, polyester and polyurethane may be used, and commercially available disperbyk-161, 163, 165, 2000, 2001, LPN-21116, LPN-6919 (BYK-chemie), PB -821, 822, 880 (AJINOMOTO FINE TECHNO), solsperse 24000 (Lubricazole) and the like can be used alone or in combination. Such a dispersant may be used in the range of 0.1 to 40% by weight in the pigment dispersion composition, wherein if the amount used is less than the above range, the dispersion is not sufficient. Since it is difficult to control and tends to impair processability in a color filter manufacturing process, it is good to adjust to the said range.

Pigments used in the pigment dispersion composition of the present invention can be used if the pigment, such as red, green, blue, yellow, purple, etc., which enables the desired color expression in the color filter, specifically, for example, phthalocyanine (Phthalocyanine ), Nacridone (Quinacridone), anthraquinone (dioxazine), nickel complex (Ni-complex), such as pigments currently used in the art can be used. Preferably it can exhibit a high effect on the phthalocyanine-based pigment containing zinc. Such pigments may be used in the range of 1 to 30% by weight of the pigment dispersion composition of the present invention, when the amount is less than the above range is not easy to reproduce the color, if the amount is more than the above range is difficult in the dispersion process There is a tendency to suffer.

The solvent used in the pigment dispersion composition of the present invention is capable of dissolving the components constituting the composition, and may be an organic solvent that is commonly used in the art. Specifically, for example, Propylene Glycol mono Methyl Ether Acetate (PGMEA), Ethyl-3-Ethoxy Propionate (EEP), Cyclohexanone, etc. Can be used. The solvent may use 10 to 80% by weight, preferably 20 to 80% by weight of the pigment dispersion composition. At this time, if the amount of the solvent is less than the above range, the dispersion tends to be difficult due to the rapid increase in viscosity and temperature increase during the dispersion, and if the amount of the solvent is more than the above range, the dispersion energy is excessive to make the dispersed particle size finer. There exists a tendency for superdispersion to arise and the stability of a pigment dispersion composition to fall at this time.

On the other hand, in the pigment dispersion composition of the present invention, if the solid content concentration (pigment + dispersant + dispersion binder) is 50% by weight or more, the viscosity of the composition may be excessively high, which may lead to the inhibition of workability during the dispersing process. Hereinafter, it is good to adjust so that total solid content concentration may be 50 weight% or less.

In addition to the above components, additives commonly used in the art may be suitably used by those skilled in the art within the scope of not impairing the object of the present invention, but the present invention is not limited thereto.

Hereinafter, the manufacturing method of the pigment dispersion composition for color filters of this invention is demonstrated concretely.

First, in preparing a pigment dispersion composition for color filters comprising an acrylic binder, a dispersant, a pigment and a solvent, 1) mixing the dispersant, the pigment and the solvent. Step 1) may be performed according to a method conventionally made in the art. After mixing the dispersant, the pigment and the solvent sufficiently, the (meth) acrylic binder having a glycidyl group (epoxy) and the acrylic binder mixture having a tetrahydrofurfurfuryl group (tetrahydrofurfurfuryl) as an acrylic binder are added to the resultant of step 1). 2) step of mixing at high speed is performed.

In the present invention, in order to have a finer and smaller particle size distribution of the dispersed particles of the pigment, mixing and stirring (pre-mixing) and dispersion (primary and secondary dispersion) are largely performed in three processes. Steps 1) and 2) are pre-mixing steps, whereby the pigment is wetted and the dispersant and the acrylic dispersion binder can be brought into a uniform state. Steps 1) and 2) may be performed until the pigment is wetted or the acrylic dispersion binder reaches a sufficiently uniform state, and is preferably performed for 10 to 15 hours.

By mixing and stirring as described above, the pigment composition is stabilized before the first dispersion (preliminary dispersion). As a result, the dispersion and the dispersant in the solvent can be uniformly mixed and dissolved, and the dispersant can be optimally adsorbed onto the pigment surface. To ensure that When the mixing and stirring time is insufficient, air adhering to the surface of the pigment is not removed, so that the adsorption of the dispersant is not performed smoothly, and the micronization effect of the pigment dispersion particles is inhibited, thereby degrading the performance of the pigment dispersion composition.

3) to stabilize the result of step 2) at room temperature (20 to 25 ℃) for 10 to 15 hours. By the step 3), the pigment, the dispersant, and the acrylic dispersion binder are sufficiently dissolved and stabilized in the solvent, and the dispersant is sufficiently adsorbed on the pigment surface, and the acrylic binder is uniformly dissolved with the pigment and the dispersant in the solution.

In the present invention, the mixing step is carried out by the steps 1) and 2), followed by a dispersion step, wherein the dispersion is performed as a primary dispersion (pre-milling) and a secondary dispersion (main milling). Proceed.

That is, 4) the second dispersion at 5 to 15 ℃ after the first dispersion of the product of step 3).

The primary dispersion causes the mixture of the pigment, the dispersant, the acrylic dispersion binder and the solvent to be uniform through the mixing and agitation, but pigment aggregate particles of 100 μm or more are present to settle or inhibit uniform particle dispersion during the secondary dispersion. This step is to remove the large particles. In this case, it is preferable to proceed with the process using 1.0 to 3.0 mm media to remove the large particles, it is possible to use a disperser such as an attrition mill, a resolver, a sand mill, It is not limited to this. The primary dispersion may be repeated several times as necessary.

The secondary dispersion (main dispersion) is a process carried out in order to make the pigment dispersion composition which has undergone mixing and stirring in the preceding step more finely. At this time, the media used are zirconia beads, alumina beads, titania beads and the like, but the beads are dispersed at a size of 0.05 to 0.6 mm. In this case, the disperser used is not limited to a vertical and horizontal disperser capable of high speed rotation in a closed type, and the second dispersion may be repeated several times as necessary.

On the other hand, in the present invention, while the dispersion energy is applied by the acid value or amine value of the dispersing agent and the epoxy content and acid value of the acrylic dispersion binder during the dispersion of step 4), the dispersion energy is converted into thermal energy to stabilize the pigment dispersion composition. In order to prevent the inhibition, in particular, during the second dispersion, strong dispersion energy is generated due to the use of fine beads rather than the first dispersion, and the generated dispersion energy is converted into thermal energy, so that the dispersion temperature is maintained at 5 to 15 ° C. At this time, if the dispersing temperature is less than 5 ℃ due to excessive supercooling solubility of the dispersing agent and the dispersing binder in the solvent is lowered, the pigment surface adsorption of the dispersing agent is not smooth, the dispersion performance is hindered, it is difficult to refine the dispersed particle size, pigment dispersion Due to the poor fluidity of the pigment, dispersant, and acrylic dispersion binder in the composition, uniform dispersion energy may not be applied and dispersion may occur unevenly. This may cause problems due to an increase in dispersion time due to a decrease in dispersibility of the pigment dispersion composition and a nonuniform overdispersion of the pigment dispersion composition. In addition, the dispersion temperature should be maintained in the above stable range, if the dispersion temperature is not kept stable the deformation of the dispersant and the binder occurs by the heat generated by the dispersion energy is converted into thermal energy. As a result, the viscosity and temperature of the pigment composition are rapidly increased, and the pigment particle size is increased during dispersion to cause a phenomenon such as gelation. In particular, reactive functional groups such as glycidyl (epoxy) in the dispersing binder cause ring opening of the molecular structure due to heat, thereby rapidly increasing the molecular weight of the binder, thereby rapidly increasing the viscosity of the pigment composition to impair safety. Let's go.

To prepare a pigment dispersion composition for color filters excellent in chemical resistance of the present invention comprising the step of stabilizing the result of step 4) at room temperature for 24 to 60 hours.

The pigment dispersion composition of the present invention described above exhibits excellent chemical resistance as ΔEa * b * (TC-7000 model of Lambdavision) in the range of 0.1 to 10.

Evaluation of the chemical resistance of the pigment dispersion composition was carried out using a pigment dispersion composition according to the present invention after the production of color filter photoresist spin coating (pre-bake) -exposure and After completion of the hard-bake process, the specimen is immersed in the process solvent, normal methyl-2 pyrrolidone (NMP) and isopropyl alcohol (IPA) at room temperature for 30 minutes. After washing with water, the color characteristics of the specimen may be performed by measuring and evaluating, in particular, ΔEa * b * (Lamdavision TC-7000 model).

The pigment dispersion composition of the present invention by using an acrylic dispersion binder having a glycidyl group and THF group, the chemical resistance is improved compared to the conventional can be expected to improve the physical properties when applied to a color filter photosensitive agent.

Since the pigment dispersion composition of the present invention is excellent in chemical resistance and development characteristics, it can be expected to have an effect of expressing high quality color characteristics by applying it to various color filter photosensitizers.

In addition, the above-described pigment dispersion composition of the present invention can obtain an effect of excellent chemical resistance performance improvement, especially when applied to zinc phthalocyanine (CI Number Pigment Green), which is weak chemical resistance.

Hereinafter, the present invention will be described in detail with reference to Examples and the like, but the present invention is not limited to the following Examples and the like.

Synthetic example  One. Glycidyl groups  Having ( Meta Acrylic Dispersion Binder Synthesis [ No . 1 binder]

A four-necked flask equipped with a thermometer, a condenser, a dropping funnel, and a stirrer was used as a reaction vessel. PGMEA, a solvent, was added to a 70 g flask, and heated to 70 ° C. under a nitrogen atmosphere to be glycidyl methacrylate (GMA) and benzyl. 30 g of a monomer mixture in which methacrylate (BzMA), methyl methacrylate (MMA) and methacrylate acid (MMA) were mixed in the ratio shown in Table 1 and 0.24 g of a thermal polymerization initiator (AIBN) were added for 8 hours. Reacted.

After completion of the reaction, the molecular weight of the (meth) acrylic dispersion binder having a glycidyl group was measured using GPC (penetration chromatography). The weight average molecular weight (Mw) was 24,600, and the acid value (KOH / mg) 112, The glycidyl group content in the polymer was 8 mol%.

Synthetic example  2. Glycidyl groups  Having ( Meta Acrylic Dispersion Binder Synthesis [ No . 1-1 Binder]

Using 30 g of a monomer mixture in which glycidyl methacrylate (GMA), benzyl methacrylate (BzMA), methyl methacrylate (MMA) and methacrylic acid (MMA) were mixed in the ratios of the following Table 1, In the same manner as in Synthesis Example 1, a (meth) acrylic dispersion binder having a glycidyl group was synthesized, its weight average molecular weight was 26,300, the acid value was 113 mg / KOH, and the glycidyl group content in the polymer was 20 mol%. .

Synthetic example  3. Glycidyl groups  Having ( Meta Acrylic Dispersion Binder Synthesis [ No . 1-2 binder]

Using 30 g of a monomer mixture in which glycidyl methacrylate (GMA), benzyl methacrylate (BzMA), methyl methacrylate (MMA) and methacrylic acid (MMA) are mixed in the ratios of the following Table 1, A (meth) acrylic dispersion binder having a glycidyl group was synthesized in the same manner as in Synthesis example 1. The weight average molecular weight thereof was 25,200, the acid value was 120 mg / KOH, and the glycidyl group content in the polymer was 1 mol%. .

Synthetic example  4. THF  Synthetic Acrylic Binder Synthesis Having Groups [ No . 2 binders]

Tetrahydrofurfuryl methacrylate (THFMA) is used instead of glycidyl methacrylate (GMA), and tetrahydrofurfuryl methacrylate (THFMA), benzyl methacrylate (BzMA), methyl methacrylate (MMA) To prepare a acrylic dispersion binder having a THF group in the same manner as in Synthesis Example 1, using 30 g of a monomer mixture of methacrylic acid (MMA) mixed in the ratio of the following Table 1, the weight average molecular weight is 14,200 The acid value was 120 mg / KOH and the THF group content in the polymer was 8 mol%.

Synthetic example  5. Synthesis of Acrylic Dispersion Binder [ No . 3 binders]

Benzyl methacrylate (BzMA), methyl methacrylate (MMA), methacrylic acid (MMA) using 30 g of a monomer mixture mixed in the ratio of the following Table 1, acrylic dispersion in the same manner as in Synthesis Example 1 A binder was synthesized, its weight average molecular weight was 25,300, and the acid value was 113 mg / KOH.

The properties of the dispersion binders obtained in Synthesis Examples 1 to 5 are collectively shown in Table 1 below.

No Monomer ratio Mw Acid
(mg / KOH) GMA content
mol% THFMA Content
mol% One GMA / BzMA / MMA / MAA
(8: 37: 27: 28) 24,600 112 8 - 1-1 GMA / BzMA / MMA / MAA
(20: 25: 27: 28) 26,300 113 20 - 1-2 GMA / BzMA / MMA / MAA
(1: 42: 28: 29) 25,200 120 One - 2 THFMA / BzMA / MMA / MAA
(8: 35: 28: 29) 14,200 120 - 8 3 BzMA / MMA / MAA
(37: 35: 28) 25,300 113 - -

Example  And Comparative example . Preparation of pigment dispersion composition for color filter

Each pigment dispersion composition was prepared according to the blending ratios shown in Table 2 below.

Each pigment composition was put in a 500 ml double jacket tank and mixed stirring was performed for 1 hour using Dipermat-CV (manufactured gatzmann). After stirring the mixture was stabilized for 24 hours at room temperature (25 ℃).

The mixed stirred and stabilized mixture was charged with 2.0 mm zirconia beads and first dispersed (preceding dispersion) for 1 hour, and Dispermat-CV (manufactured gatzmann) was used as the disperser. After the primary dispersion was completed, the mixture was filled with 80% 0.4 mm beads in Dispermat-SL (manufactured gatzmann), which is a closed horizontal mill, to perform secondary dispersion in a repeated circulation process for 6 hours. At this time, the cooling water temperature was maintained such that the dispersion temperature was 5 to 15 ° C. After completion of the secondary dispersion was stabilized for 48 hours at room temperature (25 ℃) to obtain a pigment dispersion composition for color filters, the solid content of the obtained pigment dispersion composition was 20.4% by weight.

Pigment
(CI number) Dispersant Dispersing binder menstruum Example 1 Green 58 Disperbyk-2001 No.1 / No.2 50/50 PGMEA Example 2 Green 58 No.1 / No.2 60/40 Example 3 Green 36 No.1 / No.2 50/50 Example 4 Red 254 No.1 / No.2 50/50 Example 5 Yellow 139 No.1 / No.2 50/50 Example 6 Yellow 150 No.1 / No.2 50/50 Comparative Example 1 Green 58 No. 3 100 Comparative Example 2 Homology No. One 100 Comparative Example 3 Homology No. 2 100 Comparative Example 4 Homology No.1-1 / No.2 50/50 Comparative Example 5 Homology No.1-2 / No.2 50/50 1) Pigment used: Dispersant: Dispersion binder: Solvent is 12% by weight: 4.8% by weight: 3.6% by weight: 79.6l% by weight.
2) Green 58 (DIC), Green 36 (Clariant), Red 254 (Siva Spashity), Yellow 139 (Siva Spashity), Yellow 150 (Lances), Disperbyk-2001 (BYK chemie)

Experimental Example . Chemical resistance  Measure

9.8% by weight of the pigment dispersion composition (solid content 20.4%), the self-manufactured as an acrylic binder (Mw 20,000, acid value 126, solid content 36%) 0.51% by weight, DPEHA (trade name: DPHEA MIRAMER M600, Miwon Specialty Chemicals) 0.67% by weight, 0.1-3% by weight of I-369 (trade name: I-369, Ciba Specialty Co.) as a photoinitiator was prepared to prepare a color coating solution, 1 After coating to a thickness of ~ 2 ㎛ and dried for 5 minutes on a 90 ℃ hot plate to form a coating film.

The dried coating film was irradiated with a UV-lamp having a wavelength of 395 nm, and then dried in a 220 ° C. hot air oven for 40 minutes to obtain a final coating film. The coating was immersed in 25 ° C. n-methyl-2-pyrrolidone (NMP), isopropyl alcohol (IPA) for 40 minutes, washed with deionized water and dried, and then ΔEa * b * (Lamdavision TC-7000 model) was measured, and the results are shown in Table 3 below.

IPAΔEa * b * NMPΔEa * b * % Change in IPA NMP rate of change (%) Developability Example 1 0.4 5.7 29 20 Good Example 2 0.3 4.8 21 16 Good Example 3 0.3 0.4 21 One Good Example 4 0.5 1.2 36 4 Good Example 5 0.3 0.4 21 One Good Example 6 0.5 0.9 36 3 lack Comparative Example 1 1.4 29.2 Good Comparative Example 2 0.7 8.0 50 27 Bad Comparative Example 3 1.0 19.4 71 66 Good Comparative Example 4 0.3 3.8 21 13 Bad Comparative Example 5 1.0 16.1 71 55 Good

In Table 3, IPA ΔEa * b * and NMP ΔEa * b * refer to numerical values representing color change on a color coordinate. Higher values indicate a larger color change, and lower values mean a smaller color change. . In the embodiment of the present invention using an acrylic binder as shown in Table 3, the color change value is relatively small compared to the case where the binder containing grillidyl group (epoxy) and tetrahydrofurfuryl group is used. can confirm.

In Table 3, the change rates for IPA and NMP are acryl-based binders, which do not include grillidyl group (epoxy) and tetrahydrofurfuryl group, and are benzyl methacrylate (BzMA), methyl methacrylate (MMA), and methacrylate. The relative change based on the comparative example 1 using the acrylic binder which consists of an acid (MMA) is shown, The big change rate means the big color change, and the low means the small color change. As shown in Table 3, in the case of the embodiment of the present invention using an acrylic binder mixed, it can be confirmed that the present invention exhibits a small change of less than 30% relative to the comparative example.

In addition, in the case of the embodiment of the present invention it can be seen that the developability is good.

As described above, the pigment dispersion composition of the present invention using an acrylic binder having glycidyl group (epoxy) and HF group may be confirmed to have excellent chemical resistance against IPA and NMP which are process solvents.

As described above, the present invention brings the stability of the pigment dispersion composition by using a binder having excellent chemical resistance in the dispersing process, and by adjusting the mixing ratio of two or more kinds, the composition of the present invention is excellent in chemical resistance and development characteristics. The high quality can be applied to various color filter photosensitizers. Particularly, when applied to zinc phthalocyanine (CI Number Pigment Green), which is weak in chemical resistance, it may exhibit excellent chemical resistance performance improvement.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

Claims (8)

In the pigment dispersion composition for color filters containing an acrylic binder, a dispersing agent, a pigment, and a solvent,
The acrylic binder is a (meth) acrylic binder having a glycidyl group (epoxy) and an acrylic binder mixture having a tetrahydrofurfurfuryl group (tetrahydrofurfurfuryl) characterized in that the color filter excellent pigment dispersion composition for chemical resistance.
The method according to claim 1,
The (meth) acrylic binder having a glycidyl group (epoxy) and the acrylic binder mixture having a tetrahydrofurfurfuryl group (tetrahydrofurfurfuryl) is a color with excellent chemical resistance, characterized in that contained in the range of 0.1 to 50% by weight in the composition Pigment dispersion composition for filters.
The method according to claim 1,
The (meth) acrylic binder having a glycidyl group (epoxy) is 0.05 to 10% by weight, the acrylic binder having a tetrahydrofurfurfuryl group (tetrahydrofurfurfuryl) chemical resistance, characterized in that included in the range 0.05 to 40% by weight This excellent pigment dispersion composition for color filters.
The method according to claim 1,
The (meth) acrylic binder having a glycidyl group (epoxy) has a glycidyl group (epoxy) content of 3 to 30 mol%, a weight average molecular weight of 5,000 to 100,000 range, characterized in that the acid value of 50 to 150 mg / KOH range Pigment dispersion composition for color filters excellent in chemical resistance.
The method according to claim 1,
The acrylic binder having a tetrahydrofurfuryl group (tetrahydrofurfuryl) is characterized in that the tetrahydrofurfuryl group (tetrahydrofurfuryl) content of 2 to 20 mol%, the weight average molecular weight range of 3,000 to 30,000, acid value 80 to 150 mg / KOH range Pigment dispersion composition for color filters excellent in chemical resistance.
The method according to claim 1,
The acrylic binder mixture, dispersant, pigment and solvent,
Pigment dispersion composition for excellent chemical resistance, characterized in that it comprises 0.1 to 50% by weight of the acrylic binder mixture, 0.1 to 40% by weight of the dispersant, 1 to 30% by weight of the pigment, 10 to 80% by weight of the solvent.
In the manufacturing method of the pigment dispersion composition for color filters containing an acrylic binder, a dispersing agent, a pigment, and a solvent,
1) mixing the dispersant, the pigment and the solvent,
2) adding a (meth) acrylic binder having an glycidyl group (epoxy) and an acrylic binder mixture having a tetrahydrofurfurfuryl group as an acrylic binder to the resultant of step 1) and mixing them at high speed;
3) stabilizing the product of step 2) at room temperature for 10 to 15 hours,
4) first dispersing the product of step 3) and then secondly dispersing at 5 to 15 ℃, and
5) stabilizing the result of 4) at room temperature for 24 to 60 hours
Method for producing a pigment dispersion composition for color filters excellent in chemical resistance, characterized in that comprises a.
The method of claim 7,
The acrylic binder mixture, dispersant, pigment and solvent,
Preparation of pigment dispersion composition for excellent chemical resistance, characterized in that it comprises 0.1 to 50% by weight of the acrylic binder mixture, 0.1 to 40% by weight of the dispersant, 1 to 30% by weight of the pigment, 10 to 80% by weight of the solvent Way.