CN112011216B - Light-screening ink composition - Google Patents

Light-screening ink composition Download PDF

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Publication number
CN112011216B
CN112011216B CN201910466372.6A CN201910466372A CN112011216B CN 112011216 B CN112011216 B CN 112011216B CN 201910466372 A CN201910466372 A CN 201910466372A CN 112011216 B CN112011216 B CN 112011216B
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light
ink composition
parts
weight
shielding ink
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CN112011216A (en
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张良睽
陈乃菁
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Cymmetrik Enterprise Co ltd
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Cymmetrik Enterprise Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present disclosure provides a light-shielding ink composition comprising: a polyurethane resin having 10 to 30 parts by weight based on 100 parts by weight of the light-shielding ink composition; a polyvinyl acetal resin having chemical formula (I) and having 4 to 10 parts by weight per 100 parts by weight of the light-shielding ink composition; and a black filler having 10 to 20 parts by weight based on 100 parts by weight of the light-shielding ink composition. The light-shielding ink composition has high light shielding and high resistance characteristics at the same time.

Description

Light-screening ink composition
Technical Field
The present disclosure relates to a light-shielding ink composition, and more particularly, to a light-shielding ink composition having both high light-shielding and high resistance characteristics.
Background
In recent years, with the rapid development of the 3C industry, related derivative products such as panels, displays and the like are becoming more popular, and it is a common practice to use a light-shielding tape on the product frame in the manufacturing process to avoid the light leakage defect of the products.
At present, the light-shielding tape is manufactured by coating light-shielding ink on a substrate by gravure coating, drying and rolling the substrate, and further coating pressure-sensitive adhesive after curing to obtain a finished product, so the quality of the light-shielding ink determines the physical properties of the tape. To achieve high light-shielding efficacy, the light-shielding ink needs to have the property of exhibiting high optical density (o.d.) at a low coating thickness (about 4 μm), and the surface of the dry film after coating must not have finger-touch tackiness for smooth rolling in the gravure process. In addition, in response to the development of light, thin, small and small electronic products, the frame light-shielding material is also required to have good insulation property. However, the black filler commonly used in the preparation of light-shielding ink generally has high conductive effect, so that the final light-shielding ink has poor surface insulation, and therefore, how to develop a light-shielding ink product having both high light-shielding property and high resistance property is a major issue in related industries.
Therefore, it is desired to develop a light-shielding ink composition having both high light-shielding and high resistance characteristics.
Disclosure of Invention
The invention aims to provide a light-shielding ink composition having both high light-shielding and high-resistance characteristics.
According to an embodiment of the present disclosure, there is provided a light-shielding ink (light-shielding ink) composition including: a polyurethane resin (polyurethane resin) having 10 to 30 parts by weight based on 100 parts by weight of the light-shielding ink composition; a polyvinyl acetal resin (polyvinyl acetate resin) having the following chemical formula (I) and having 4 to 10 parts by weight based on 100 parts by weight of the light-shielding ink composition; and a black filler having 10 to 20 parts by weight based on 100 parts by weight of the light-shielding ink composition.
Figure BDA0002079510070000021
In the formula (I), R 1 Is hydrogen or acetate, R 2 Is an aliphatic compound having 1 to 10 carbon atoms (aliphatic compounds), x is an integer of 1 to 50, and y is an integer of 1 to 200.
In some embodiments, R in formula (I) 2 Is a C1-10 linear aliphatic hydrocarbon, branched aliphatic hydrocarbon or alicyclic hydrocarbon.
In some embodiments, R in formula (I) 2 Is n-butane.
In some embodiments, the polyvinyl acetal resin has 4 to 6 parts by weight based on 100 parts by weight of the light shielding ink composition.
In some embodiments, the polyvinyl acetal resin has a weight average molecular weight of 10,000 to 30,000.
In some embodiments, the polyvinyl acetal resin has a weight average molecular weight of 10,000 to 20,000.
In some embodiments, the polyurethane resin includes a resin structure polymerized with Isophorone diisocyanate (isophoron diisocyanate), toluene diisocyanate (2, 4-diisocyanato-1-methyl-benzene), diphenylmethane diisocyanate (methyl diisocyanate), hydrogenated diphenylmethane diisocyanate (4, 4' -Diisocyanatodicyclohexylmethane), or combinations thereof.
In some embodiments, the black filler comprises carbon black, carbon nanotubes, graphite, or a combination thereof.
In some embodiments, the light-blocking ink composition further comprises a dispersant. In some embodiments, the dispersant comprises an acidic block polymer, a basic block polymer, a condensation polymer, or a combination thereof. In some embodiments, the dispersant has 1.5 to 4.5 parts by weight based on 100 parts by weight of the light-shielding ink composition.
In some embodiments, the black matrix composition further comprises a diluent. In some embodiments, the diluent has a boiling point between 30 and 130 ℃. In some embodiments, the diluent comprises ethyl acetate, butyl acetate, propylene glycol methyl ether, or a combination thereof. In some embodiments, the diluent has 50 to 75 parts by weight based on 100 parts by weight of the light shielding ink composition.
Compared with the prior art, the invention has the advantages that: the light-shielding ink composition has both high light shielding and high resistance characteristics. The polyvinyl acetal resin (polyvinyl acetate) used in the light-shielding ink composition is a product obtained by performing an acetal reaction on polyvinyl alcohol (PVA) and aldehyde, and is miscible with polyurethane resin by using a hydrophilic hydroxyl group on the structure, and the hydrophobic acetal group effectively dilutes the concentration of a polar functional group in ink composition, so that the effect of improving the surface resistance is achieved. In addition, the glass transition temperature of the polyvinyl acetal resin is higher than that of the resin commonly used in the printing ink, and the defects of finger touch and adhesion of a cured film can be effectively improved by mixing and matching the polyvinyl acetal resin. The light-shielding ink composition is suitable for light-shielding coating required by electronic products.
Detailed Description
According to an embodiment of the present disclosure, there is provided a light-shielding ink (light-shielding ink) composition including:
a polyurethane resin (polyurethane resin) having 10 to 30 parts by weight based on 100 parts by weight of the light-shielding ink composition;
a polyvinyl acetal resin (polyvinyl acetate resin) having the following chemical formula (I) and having 4 to 10 parts by weight based on 100 parts by weight of the light-shielding ink composition; and
-a black filler having 10-20 parts by weight based on 100 parts by weight of the light-shielding ink composition.
Figure BDA0002079510070000031
In the formula (I), R 1 Can be hydrogen or acetate, R 2 May be an aliphatic compound having 1 to 10 carbon atoms, x may be an integer of 1 to 50,and y may be an integer from 1 to 200.
In some embodiments, R in formula (I) 2 It may be a linear aliphatic hydrocarbon, branched aliphatic hydrocarbon or alicyclic hydrocarbon having 1 to 10 carbon atoms.
In some embodiments, R in formula (I) 2 Can be n-butane.
In some embodiments, the polyvinyl acetal resin has 4 to 6 parts by weight based on 100 parts by weight of the light shielding ink composition.
In some embodiments, the polyvinyl acetal resin has a molecular weight of about 10,000 to about 30,000.
In some embodiments, the polyvinyl acetal resin has a molecular weight of between about 10,000 and 20,000.
In some embodiments, the polyurethane resin includes a resin structure polymerized with Isophorone diisocyanate (isophoronic diisocyanate), toluene diisocyanate (2, 4-diisocyanato-1-methyl-benzene), diphenylmethane diisocyanate (Methylene diisocyanate), hydrogenated diphenylmethane diisocyanate (4, 4' -diisocyanatotoxycyclohexane), or combinations thereof.
In some embodiments, the black filler comprises carbon black, carbon nanotubes, graphite, or a combination thereof.
In some embodiments, the light-blocking ink composition further comprises a dispersant. In some embodiments, the dispersant can include an acidic block polymer, a basic block polymer, a condensation polymer, or a combination thereof. In some embodiments, the dispersant has 1.5 to 4.5 parts by weight based on 100 parts by weight of the light shielding ink composition.
In some embodiments, the black matrix composition further comprises a diluent. In some embodiments, the boiling point of the diluent is between 30 and 130 ℃. In some embodiments, the diluent may include ethyl acetate, butyl acetate, propylene glycol methyl ether, or a combination thereof. In some embodiments, the diluent has 50 to 75 parts by weight based on 100 parts by weight of the light shielding ink composition.
Examples/comparative examples
Example 1 preparation of a sunscreen ink composition of the present invention (1)
First, 17.7 parts by weight of polyurethane resin (available from developed technologies under the trade name of UB-060N) and 4 parts by weight of polyvinyl acetate resin (available from Kuraray under the trade name of Mowital B16H having a molecular weight of about 10,000 to 20,000) were dissolved in 50 parts by weight of ethyl acetate (available from Jingming chemical Co., ltd.) and stirred at 1,000rpm for 10 minutes to form a stirred solution.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirring liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of zirconium beads for polishing was added to the above-mentioned stirred solution, and the mixture was polished at 3,000rpm for 1 hour. Thus, the preparation of the light-shielding ink composition of the present example was completed. The components and proportions (in parts by weight) of the light-shielding ink composition of this example are shown in table 1.
Example 2 preparation of a sunscreen ink composition of the present invention (2)
First, 16.7 parts by weight of polyurethane resin (trade name: UB-060N, available from Zyoyo Tech., ltd.) and 5 parts by weight of polyvinyl acetal resin (trade name: mowital B16H, molecular weight: about 10,000-20,000, available from Kuraray, ltd.) were dissolved in 50 parts by weight of ethyl acetate (diluent, available from Jingming chemical Co., ltd.) and stirred at 1,000rpm for 10 minutes to form a stirred solution.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirring liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of zirconium beads for polishing was added to the above-mentioned stirred solution, and the mixture was polished at 3,000rpm for 1 hour. Thus, the preparation of the light-screening ink composition of the present example was completed. The components and proportions (in parts by weight) of the light-screening ink composition of this example are shown in table 1.
Example 3 preparation of a sunscreen ink composition of the present invention (3)
First, 15.7 parts by weight of polyurethane resin (trade name: UB-060N) and 6 parts by weight of polyvinyl acetal resin (trade name: mowital B16H, molecular weight: about 10,000-20,000) were dissolved in 50 parts by weight of ethyl acetate (diluent, trade name: scott chemical) and stirred at 1,000rpm for 10 minutes to form a stirred solution.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (obtained from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent, obtained from Scottish chemical corporation) were mixed and poured into the above-mentioned stirring liquid, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirred liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of zirconium beads for polishing was added to the above-mentioned stirred solution, and the mixture was polished at 3,000rpm for 1 hour. Thus, the preparation of the light-screening ink composition of the present example was completed. The components and proportions (in parts by weight) of the light-screening ink composition of this example are shown in table 1.
Example 4 preparation of a sunscreen ink composition of the present invention (4)
First, 16.7 parts by weight of polyurethane resin (trade name: UB-060N, available from Zyoyo Tech., ltd.) and 5 parts by weight of polyvinyl acetal resin (trade name: mowital B20H, molecular weight: about 20,000-30,000, available from Kuraray, ltd.) were dissolved in 50 parts by weight of ethyl acetate (diluent, available from Jingming chemical Co., ltd.) and stirred at 1,000rpm for 10 minutes to form a stirred solution.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirring liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of zirconium beads for polishing was added to the above-mentioned stirred solution, and the mixture was polished at 3,000rpm for 1 hour. Thus, the preparation of the light-shielding ink composition of the present example was completed. The components and proportions (in parts by weight) of the light-screening ink composition of this example are shown in table 1.
TABLE 1
Example 1 Example 2 Example 3 Example 4
UB-060N 17.7 16.7 15.7 16.7
Mowital B16H 4 5 6 -
Mowital B20H - - - 5
EFKA-4310 2.8 2.8 2.8 2.8
REGAL 250R 14 14 14 14
Ethyl acetate 61.5 61.5 61.5 61.5
Comparative example 1 preparation of sunscreen ink composition (1)
First, 21.7 parts by weight of polyurethane resin (trade name: UB-060N, available from Zeolite scientific Co.) was dissolved in 50 parts by weight of ethyl acetate (diluent, available from Jingming chemical Co.) and stirred at 1,000rpm for 10 minutes to form a stirred solution.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirring liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of zirconium beads for polishing was added to the above-mentioned stirred solution, and the mixture was polished at 3,000rpm for 1 hour. Thus, the preparation of the light-shielding ink composition of this comparative example was completed. The components and proportions (in parts by weight) of the light-shielding ink composition of this comparative example are shown in table 2.
Comparative example 2 preparation of sunscreen ink composition (2)
First, 18.7 parts by weight of polyurethane resin (trade name: UB-060N, available from Zyoyo Tech., ltd.) and 3 parts by weight of polyvinyl acetal resin (trade name: mowital B16H, molecular weight: about 10,000-20,000, available from Kuraray, ltd.) were dissolved in 50 parts by weight of ethyl acetate (diluent, available from Jingming chemical Co., ltd.) and stirred at 1,000rpm for 10 minutes to form a stirred solution.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirring liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of the beads was added to the stirred solution, and the mixture was ground at 3,000rpm for 1 hour. Thus, the preparation of the light-shielding ink composition of this comparative example was completed. The components and the ratio (in parts by weight) of the light-shielding ink composition of this comparative example are shown in table 2.
Comparative example 3 preparation of sunscreen ink composition (3)
First, 14.7 parts by weight of polyurethane resin (available from developed technologies under the trade name of UB-060N) and 7 parts by weight of polyvinyl acetal resin (available from Kuraray under the trade name of Mowital B16H having a molecular weight of about 10,000 to 20,000) were dissolved in 50 parts by weight of ethyl acetate (available from Jingming chemical Co., ltd.) and stirred at 1,000rpm for 10 minutes to form a stirred solution.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirring liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of zirconium beads for polishing was added to the above-mentioned stirred solution, and the mixture was polished at 3,000rpm for 1 hour. Thus, the preparation of the light-shielding ink composition of this comparative example was completed. The components and proportions (in parts by weight) of the light-shielding ink composition of this comparative example are shown in table 2.
Comparative example 4 preparation of sunscreen ink composition (4)
First, 16.7 parts by weight of polyurethane resin (available from developed technologies under the trade name UB-060N) and 5 parts by weight of polyvinyl acetate resin (available from Kuraray under the trade name Mowital B30H having a molecular weight of about 30,000 to 40,000) were dissolved in 50 parts by weight of ethyl acetate (available from Jingming chemical Co., ltd.) and stirred at 1,000rpm for 10 minutes to form a stirred solution.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirred liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of the beads was added to the stirred solution, and the mixture was ground at 3,000rpm for 1 hour. Thus, the preparation of the light-shielding ink composition of this comparative example was completed. The components and the ratio (in parts by weight) of the light-shielding ink composition of this comparative example are shown in table 2.
Comparative example 5 preparation of sunscreen ink composition (5)
First, 16.7 parts by weight of a polyurethane resin was added(polyurethane resin) (available from Zhanyu scientific and technology materials, trade name: UB-060N) and 5 parts by weight of silica (available from Daiica, inc., trade name: ACEMATT OK-412) were dissolved in water50A stirred solution was formed by stirring ethyl acetate (diluent, available from Segmine chemical Co.) in parts by weight at 1,000rpm for 10 minutes.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirring liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of zirconium beads for polishing was added to the above-mentioned stirred solution, and the mixture was polished at 3,000rpm for 1 hour. Thus, the preparation of the light-shielding ink composition of this comparative example was completed. The components and proportions (in parts by weight) of the light-shielding ink composition of this comparative example are shown in table 2.
Comparative example 6 preparation of sunscreen ink composition (6)
First, 16.7 parts by weight of polyurethane resin (polyurethane resin) (available from Zhanyu scientific and materials Co., ltd., trade name: UB-060N) and 5 parts by weight of cellulose acetate butyrate (available from Itakken chemical Co., ltd., trade name: CAB 381-0.1, molecular weight: about 20,000) were dissolved in 50 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.), and stirred at 1,000rpm for 10 minutes to form a stirred liquid.
Thereafter, 2.8 parts by weight of a block polymer type dispersant (available from BASF corporation, trade name: EFKA-4310) and 11.5 parts by weight of ethyl acetate (diluent available from Jingming chemical Co., ltd.) were mixed and poured into the above stirred solution, and stirred at 1,000rpm for 10 minutes. Thereafter, 14 parts by weight of carbon black (available from CABOT, inc., trade name: REGAL 250R) was added in portions to the above-mentioned stirring liquid, and each portion was stirred at 1,000rpm for 10 minutes. Thereafter, 1/2 of the total weight of the beads was added to the stirred solution, and the mixture was ground at 3,000rpm for 1 hour. Thus, the preparation of the light-shielding ink composition of this comparative example was completed. The components and the ratio (in parts by weight) of the light-shielding ink composition of this comparative example are shown in table 2.
TABLE 2
Figure BDA0002079510070000091
Example 5 preparation of a cured film of the invention (1)
The cured film of the present invention was further prepared with the light-shielding ink composition prepared in example 1. The cured film of this example was obtained by subjecting the light-shielding ink composition prepared in example 1 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Then, the cured film was subjected to tests of material characteristics such as optical density, finger tack, and surface resistance, and the test results are shown in table 3.
Example 6 preparation of cured film of the invention (2)
The preparation of the cured film of the present invention was further carried out with the light-shielding ink composition prepared in example 2. The cured film of this example was obtained by subjecting the light-shielding ink composition prepared in example 2 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Thereafter, the cured film was subjected to tests for material characteristics such as optical density, tack to touch, and surface resistance, and the test results are shown in table 3.
Example 7 preparation of a cured film of the invention (3)
The cured film of the present invention was further prepared with the light-shielding ink composition prepared in example 3. The cured film of this example was obtained by subjecting the light-shielding ink composition prepared in example 3 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Then, the cured film was subjected to tests of material characteristics such as optical density, finger tack, and surface resistance, and the test results are shown in table 3.
EXAMPLE 8 preparation of cured film of the present invention (4)
The cured film of the present invention was further prepared with the light-shielding ink composition prepared in example 4. The cured film of this example was obtained by subjecting the light-shielding ink composition prepared in example 4 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Then, the cured film was subjected to tests of material characteristics such as optical density, finger tack, and surface resistance, and the test results are shown in table 3.
TABLE 3
Figure BDA0002079510070000101
Comparative example 7 preparation of cured film (1)
The light-shielding ink composition prepared in comparative example 1 was further subjected to preparation of a cured film. The cured film of this comparative example was obtained by subjecting the light-shielding ink composition prepared in comparative example 1 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Thereafter, the cured film was subjected to tests for material characteristics such as optical density, tack to touch, and surface resistance, and the test results are shown in table 4.
Comparative example 8 preparation of cured film (2)
The light-shielding ink composition prepared in comparative example 2 was further subjected to preparation of a cured film. The cured film of this comparative example was obtained by subjecting the light-shielding ink composition prepared in comparative example 2 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Thereafter, the cured film was subjected to tests for material characteristics such as optical density, tack to touch, and surface resistance, and the test results are shown in table 4.
Comparative example 9 preparation of cured film (3)
The light-shielding ink composition prepared in comparative example 3 was further subjected to preparation of a cured film. The cured film of this comparative example was obtained by subjecting the light-shielding ink composition prepared in comparative example 3 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Thereafter, the cured film was subjected to tests for material characteristics such as optical density, tack to touch, and surface resistance, and the test results are shown in table 4.
Comparative example 10 preparation of cured film (4)
The light-shielding ink composition prepared in comparative example 4 was further subjected to preparation of a cured film. The cured film of this comparative example was obtained by subjecting the light-shielding ink composition prepared in comparative example 4 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Thereafter, the cured film was subjected to tests for material characteristics such as optical density, tack to touch, and surface resistance, and the test results are shown in table 4.
Comparative example 11 preparation of cured film (5)
The light-shielding ink composition prepared in comparative example 5 was further subjected to preparation of a cured film. The cured film of this comparative example was obtained by subjecting the light-shielding ink composition prepared in comparative example 5 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Thereafter, the cured film was subjected to tests for material characteristics such as optical density, tack to touch, and surface resistance, and the test results are shown in table 4.
Comparative example 12 preparation of cured film (6)
The light-shielding ink composition prepared in comparative example 6 was further subjected to preparation of a cured film. The cured film of this comparative example was obtained by subjecting the light-shielding ink composition prepared in comparative example 6 to a drying step (drying temperature between 80 and 100 ℃ C., drying time 30 seconds). The thickness of the resulting cured film was about 3-4 microns. Thereafter, the cured film was subjected to tests for material characteristics such as optical density, tack to touch, and surface resistance, and the test results are shown in table 4.
TABLE 4
Figure BDA0002079510070000121
As is clear from the data in tables 3 and 4, when the light-shielding ink composition contains a pure polyurethane resin as a main resin (comparative example 1), the resulting cured film had a tack-on-touch defectAnd the surface resistance is only 1.24x10 7 (Ω/sq) (comparative example 7). In order to improve this defect, a silica filler commonly used in ink was further blended (comparative example 5), but the physical properties of the cured film were not improved (comparative example 11).
If the same ratio of polyvinyl acetal resin (Mowital B16H) was added (example 2), the tack to touch of the cured film was significantly improved and the surface resistance reached 10 12 (Ω/sq), the optical density can reach 6 (example 6) which is the highest. By adjusting the content of the polyvinyl acetal resin (Mowital B16H), as is apparent from the analysis of the physical properties of the cured films of examples 5, 6 and 7 and comparative examples 8 and 9, when the content of the polyvinyl acetal resin is too low (less than 4 parts by weight) or too high (more than 6 parts by weight), the non-tacky touch and high electric resistance are exhibited, but the optical density is lowered and the brightness is lowered, so that the content of the polyvinyl acetal resin in the light-shielding ink composition is preferably 4 to 6 parts by weight.
In order to examine the influence of the molecular weight of the polyvinyl acetal resin on the physical properties of the cured film, the cured films prepared from the polyvinyl acetal resin (Mowital B20H) (example 4) having a weight average molecular weight of 20,000 to 30,000 and the polyvinyl acetal resin (Mowital B30H) (comparative example 4) having a weight average molecular weight of 30,000 to 40,000 were selected and tested, and it was found from the test results that when the molecular weight of the polyvinyl acetal resin is more than 20,000, the optical density of the cured film is seriously decreased and the brightness is not good (comparative example 10), so that the light-shielding ink composition of the present invention is preferably selected from the polyvinyl acetal resins having medium and low molecular weights.
In addition, cellulose acetate butyrate CAB (comparative example 6) having a structure similar to that of the polyvinyl acetal resin was additionally selected for comparison. The cellulose structure has hydrophilic hydroxyl groups, has good compatibility with other resins, can effectively improve the finger touch stickiness in the physical property analysis of a cured film prepared from the cellulose structure, but can only reach 5.96x10 on the surface resistance 8 (Ω/sq) (comparative example 12), the effect obtained by adding a polyvinyl acetal resin was far less.
The polyvinyl acetal resin (polyvinyl acetate resin) used in the light-shielding ink composition is a product obtained by carrying out an acetal reaction on polyvinyl alcohol (PVA) and aldehydes, and the hydrophilic hydroxyl group on the structure of the polyvinyl acetal resin is mixed with the polyurethane resin, and meanwhile, the hydrophobic acetal group effectively dilutes the concentration of a polar functional group in the ink composition, so that the effect of improving the surface resistance is achieved. In addition, the glass transition temperature of the polyvinyl acetal resin is higher than that of the resin commonly used in the printing ink, and the defects of finger touch and adhesion of a cured film can be effectively improved by mixing and matching the polyvinyl acetal resin. The light-shielding ink composition is suitable for light-shielding coating required by electronic products.
The features of the embodiments described above are useful for understanding the present invention by those having ordinary skill in the art. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. It should also be understood by those skilled in the art that such equivalent substitutions do not depart from the spirit and scope of the present invention, and that they may be changed, substituted, or altered without departing from the spirit and scope of the present invention.

Claims (10)

1. A light-blocking ink composition comprising:
a polyvinyl acetal resin having the following formula (I):
Figure FDA0003899956980000011
wherein R is 1 Is hydrogen or acetate, R 2 Is n-butane, x is an integer from 1 to 50, y is an integer from 1 to 200,
it has 4 to 6 parts by weight based on 100 parts by weight of the light-shielding ink composition, wherein the polyvinyl acetal resin has a weight average molecular weight of 10,000 to 20,000;
a polyurethane resin having 10 to 30 parts by weight based on 100 parts by weight of the light-shielding ink composition; and
a black filler having 10 to 20 parts by weight based on 100 parts by weight of the light-shielding ink composition.
2. The light-shielding ink composition according to claim 1, wherein the polyurethane resin is a resin structure polymerized with isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, or a combination thereof.
3. The light-shielding ink composition according to claim 1, wherein the black filler is carbon black, carbon nanotubes, graphite, or a combination thereof.
4. The light-shielding ink composition of claim 1, further comprising a dispersant.
5. The light-shielding ink composition according to claim 4, wherein the dispersant is an acidic block polymer, a basic block polymer, or a combination thereof.
6. The light-shielding ink composition as claimed in claim 4, wherein the dispersant has 1.5 to 4.5 parts by weight based on 100 parts by weight of the light-shielding ink composition.
7. The light-blocking ink composition of claim 1, further comprising a diluent.
8. The light-shielding ink composition as claimed in claim 7, wherein the diluent has a boiling point of 30 to 130 ℃.
9. The light-shielding ink composition of claim 7, wherein the diluent is ethyl acetate, butyl acetate, propylene glycol methyl ether, or a combination thereof.
10. The light-shielding ink composition as claimed in claim 7, wherein the diluent has 50 to 75 parts by weight based on 100 parts by weight of the light-shielding ink composition.
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