Environment-friendly degradable ink vehicle product as well as manufacturing method and application thereof

Abstract

The invention provides an environment-friendly degradable printing ink vehicle product as well as a manufacturing method and application thereof, and the manufacturing method of the environment-friendly degradable printing ink vehicle product comprises the following steps: (1) mixing soybean protein isolate with water, then mixing and stirring with ammonia water, and drying to obtain modified soybean protein isolate; and (2) mixing the modified soy isolate protein obtained in the step (1) with alkali-soluble acrylic resin to obtain the environment-friendly degradable ink vehicle product. The binder provided by the invention is used for preparing ink, overcomes the problems of poor film-forming property of vegetable protein and poor compatibility of resin, so that the composite binder has the film-forming property, rheological property and drying speed which meet the printing requirements, reduces the use amount of the resin, improves the problem of high cost of water-based ink, and enables the water-based ink to have degradability. The environment-friendly requirement is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of ink production, and in particular relates to an environmentally friendly and degradable ink vehicle product, a manufacturing method and an application thereof. Background Art

[0002] The continuous advancement of the global industrialization process has significantly increased the intensity of pollutant emissions, resulting in serious pollution of the atmosphere, water bodies and land resources, imbalance of ecological structure, induction of various natural disasters, and ultimately endangering human survival. As one of the typical high-pollution industries, the printing industry has particularly prominent environmental pollution problems in some developing countries and countries with weak industrial bases. In the printing industry, ink is one of the main sources of pollution. At present, in the printing industry chain, ink, as a core consumable, has long occupied a dominant position in pollution emissions. Traditional water-based ink binders mainly rely on petroleum-based acrylic resins, the production process of which consumes non-renewable resources and is difficult to degrade after disposal, leading to microplastic pollution and soil toxicity. In the existing technology, vegetable oil-based inks are difficult to directly replace petroleum-based resins due to their poor natural film-forming properties and low solubility. For example:

[0003] CN119081468A discloses a biomass safe and environmentally friendly ink and its preparation method, which uses plant oil-based epoxy acrylate as an ink binder to save petroleum-based materials and reduce environmental pollution. However, the ink has poor stability and safety.

[0004] CN119875423A discloses a degradable ink and a preparation method thereof, wherein a degradable water-based ink is prepared by using modified chitosan, water-based polyurethane resin and other components. However, the cost of chitosan itself is relatively high, and the cost of the ink finally prepared is also relatively high.

[0005] Therefore, how to provide a low-cost, environmentally friendly and biodegradable ink has become an urgent problem to be solved. Summary of the Invention

[0006] In response to the shortcomings of the prior art, the present invention aims to provide an environmentally friendly, biodegradable ink vehicle product, its manufacturing method, and its application. The vehicle provided by the present invention is used to prepare inks, overcoming the challenges of poor film-forming properties of plant proteins and poor resin compatibility. This composite vehicle possesses film-forming properties, rheological properties, and drying speeds that meet printing requirements, reduces resin usage, and improves the high cost of water-based inks, making them biodegradable and environmentally friendly.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a method for manufacturing an environmentally friendly and degradable ink vehicle product, the method comprising the following steps:

[0009] (1) mixing soy protein isolate (SPI) with water, then mixing with ammonia water, and drying to obtain modified soy protein isolate;

[0010] (2) The modified soy protein isolate obtained in step (1) is mixed with an alkali-soluble acrylic resin to obtain the environmentally friendly and degradable ink binder product.

[0011] The above method uses ammonia water to modify SPI, which can increase the solubility of SPI, improve the film-forming property and flower-like stability; and compound it with alkali-soluble acrylic resin to form a binder, which can reduce the amount of resin used and improve the high cost problem of water-based ink; when used to prepare ink, it overcomes the problems of poor film-forming property of plant protein and poor compatibility with resin, so that the composite binder has the film-forming property, rheology and drying speed that meet printing requirements, and makes the water-based ink degradable and meets environmental protection requirements.

[0012] Preferably, the solid content of the mixture after the soy protein isolate and water are mixed in step (1) is 8-12%, for example, 8%, 9%, 10%, 11% or 12%, etc., but is not limited to the above-listed values. Other values ​​not listed within the above numerical range are also applicable.

[0013] Preferably, after the soy protein isolate is mixed with water in step (1), the mixture is further subjected to heat treatment and / or mechanical shearing treatment.

[0014] The above treatment process can destroy the natural globular tertiary / quaternary structure of SPI, unfold the protein molecular chain, expose the internal hydrophobic amino acid residues and reactive groups, and improve the modification effect.

[0015] Preferably, the heat treatment temperature is 40-100°C, and the time is 10-50 min, wherein the temperature can be 40°C, 50°C, 60°C, 70°C, 80°C, 90°C or 100°C, etc., and the time can be 10 min, 20 min, 30 min, 40 min or 50 min, etc., but is not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0016] Preferably, the mechanical shearing treatment comprises ultrasound and / or homogenization;

[0017] Preferably, the ultrasonic time is 10-40 min, for example, 10 min, 15 min, 20 min, 25 min, 30 min, 35 min or 40 min, etc., but is not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0018] Preferably, the homogenization time is 5-30 min, for example, 5 min, 10 min, 15 min, 20 min, 25 min or 30 min, etc., but is not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0019] Preferably, after mixing with aqueous ammonia in step (1), the pH of the mixed system is 11.6-12.8, for example, 11.6, 11.8, 12.0, 12.2, 12.4, 12.6 or 12.8, but is not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0020] Preferably, the stirring time in step (1) is 30-60 min, for example, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min or 60 min, but is not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0021] Preferably, after mixing with the alkali-soluble acrylic resin in step (2), the rheological index n value of the product is 0.7-1.3, for example, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2 or 1.3, etc., but is not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0022] The above parameter control can more effectively produce the environmentally friendly and degradable ink vehicle product and improve the degradability of the ink.

[0023] In a second aspect, the present invention provides an environmentally friendly and degradable ink vehicle product manufactured by the manufacturing method described above.

[0024] In a third aspect, the present invention provides the use of the environmentally friendly and degradable ink vehicle product described above in the preparation of ink.

[0025] In a fourth aspect, the present invention further provides a water-based ink, which includes the environmentally friendly and degradable ink binder product as described above.

[0026] Preferably, the water-based ink comprises, by weight, 60-70 parts of the environmentally friendly and degradable ink binder product described above, 15-20 parts of pigment, 0.5-1 part of wetting agent, 0.2-0.5 part of defoaming agent, 1-2 parts of thickener and 0.5-1 part of dispersion stabilizer.

[0027] Among them, the number of parts of the environmentally friendly and degradable ink binder product can be 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts or 70 parts, etc., the number of parts of the pigment can be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts or 20 parts, etc., the number of parts of the wetting agent can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts or 1 parts, etc., the number of parts of the defoaming agent can be 0.2 parts, 0.3 parts, 0.4 parts or 0.5 parts, etc., the number of parts of the thickener can be 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts or 2 parts, etc., the number of parts of the dispersion stabilizer can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts or 1 parts, etc., but are not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a method for manufacturing an environmentally friendly and degradable ink vehicle product. SPI is modified by ammonia water to increase its solubility, film-forming property, and flower-like stability. The vehicle is compounded with an alkali-soluble acrylic resin to form a vehicle, thereby reducing the amount of resin used and improving the high cost of water-based inks. The vehicle is used in the preparation of inks, overcoming the difficulties of poor film-forming property of plant proteins and poor compatibility with resins, thereby ensuring that the composite vehicle has film-forming property, rheology, and drying speed that meet printing requirements, and that the water-based ink is degradable and meets environmental requirements. DETAILED DESCRIPTION

[0030] In order to further illustrate the technical means and effects adopted by the present invention, the technical solutions of the present invention are further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.

[0031] In the following examples, soy protein isolate was purchased from Shandong Yuwang Industrial Co., Ltd. and was analytically pure:

[0032] Alkali-soluble acrylic resin was purchased from Guangzhou Longhu Technology Co., Ltd., industrial grade;

[0033] Wetting agent was purchased from Tianjin Saifei Technology Development Co., Ltd., industrial grade;

[0034] Defoaming agent was purchased from Sansheng Trading Company in Shunde District, Guangdong Province, industrial grade;

[0035] Thickener was purchased from Shandong Qingdao Enze Chemical Co., Ltd., industrial grade;

[0036] The dispersion stabilizer was purchased from Guangdong Foshan Corning New Materials Co., Ltd., industrial grade.

[0037] Example 1

[0038] This embodiment provides an environmentally friendly and degradable ink vehicle product, and the specific preparation steps are as follows:

[0039] (1) Preparation of ammonia-modified SPI

[0040] SPI was dispersed in deionized water (solid content 10%) and sonicated at 60°C for 30 min to destroy the natural spherical structure and expose the reactive groups.

[0041] After cooling to room temperature (25°C), aqueous ammonia was added dropwise and magnetic stirring was performed for 40 minutes (800 rpm), during which the pH was maintained at 12;

[0042] The modified solution was centrifuged (4000 rpm, 10 min) to remove the precipitate and obtain a clear solution, which was freeze-dried to obtain modified SPI powder;

[0043] (2) Preparation of composite bonding materials

[0044] The modified SPI powder was mixed with an alkali-soluble acrylic resin at 25° C., stirred at 500 rpm for 30 min, and ultrasonically treated (40 kHz, 10 min) to eliminate microbubbles, thereby obtaining the environmentally friendly and degradable ink vehicle product having a rheological index n value of 1.

[0045] Example 2

[0046] This embodiment provides an environmentally friendly and degradable ink vehicle product, and the specific preparation steps are as follows:

[0047] (1) Preparation of ammonia-modified SPI

[0048] SPI was dispersed in deionized water (solid content 8%) and sonicated at 60°C for 30 min to destroy the natural spherical structure and expose the reactive groups.

[0049] After cooling to room temperature (25°C), aqueous ammonia was added dropwise and magnetic stirring was performed for 40 minutes (800 rpm), during which the pH was maintained at 11.6;

[0050] The modified solution was centrifuged (4000 rpm, 10 min) to remove the precipitate and obtain a clear solution, which was freeze-dried to obtain modified SPI powder;

[0051] (2) Preparation of composite bonding materials

[0052] The modified SPI powder was mixed with an alkali-soluble acrylic resin at 25° C., stirred at 500 rpm for 30 min, and subjected to ultrasonic treatment (40 kHz, 10 min) to eliminate microbubbles, thereby obtaining the environmentally friendly and degradable ink vehicle product having a rheological index n value of 0.7.

[0053] Example 3

[0054] This embodiment provides an environmentally friendly and degradable ink vehicle product, and the specific preparation steps are as follows:

[0055] (1) Preparation of ammonia-modified SPI

[0056] SPI was dispersed in deionized water (solid content 12%) and heated at 100°C for 10 min to destroy the natural globular structure and expose the reactive groups;

[0057] After cooling to room temperature (25°C), aqueous ammonia was added dropwise and magnetic stirring was performed for 40 minutes (800 rpm), during which the pH was maintained at 12.8;

[0058] The modified solution was centrifuged (4000 rpm, 10 min) to remove the precipitate and obtain a clear solution, which was freeze-dried to obtain modified SPI powder;

[0059] (2) Preparation of composite bonding materials

[0060] The modified SPI powder was mixed with an alkali-soluble acrylic resin at 25° C., stirred at 500 rpm for 30 min, and subjected to ultrasonic treatment (40 kHz, 10 min) to eliminate microbubbles, thereby obtaining the environmentally friendly and degradable ink vehicle product having a rheological index n value of 1.3.

[0061] Example 4

[0062] This embodiment provides an environmentally friendly and degradable ink binder product. The specific preparation steps are the same as those in Example 1, except for the step (1) of adding ammonia water and maintaining the pH at 11 during magnetic stirring.

[0063] Example 5

[0064] This embodiment provides an environmentally friendly and degradable ink binder product. The specific preparation steps are the same as those in Example 1, except for the step (1) of adding ammonia water and maintaining the pH at 13.5 during magnetic stirring.

[0065] Example 6

[0066] This embodiment provides an environmentally friendly and degradable ink binder product. The specific preparation steps are the same as those in Example 1, except that step (1) is not heated.

[0067] Example 7

[0068] This embodiment provides an environmentally friendly and degradable ink vehicle product. The specific preparation steps are consistent with those in Example 1 except that the rheological index n value of the environmentally friendly and degradable ink vehicle product obtained by adjusting the ratio in step (2) is 0.5.

[0069] Example 8

[0070] This embodiment provides an environmentally friendly and degradable ink vehicle product. The specific preparation steps are consistent with those of Example 1 except that the rheological index n value of the environmentally friendly and degradable ink vehicle product obtained by adjusting the ratio in step (2) is 1.5.

[0071] Application Example 1

[0072] This application example provides a water-based ink with the following composition (in percentage by mass):

[0073] The environmentally friendly and degradable ink binder product provided in Example 1 is 65%, phthalocyanine blue pigment is 18%, wetting agent is 0.8%, defoaming agent is 0.3%, thickener is 1.5%, deionized water is 14%, and dispersion stabilizer is the balance.

[0074] The preparation method is as follows:

[0075] The binder product, phthalocyanine blue pigment, wetting agent, defoaming agent and thickener were pre-mixed, ground in a grinder, a dispersion stabilizer was added, and the paint was adjusted (600 rpm, 15 min), and sieved (200 mesh screen) to obtain the product.

[0076] Application Example 2-8

[0077] Application Examples 2-8 respectively provide a water-based ink, which is consistent with Application Example 1 except that the environmentally friendly and degradable ink vehicle products provided in Example 1 are replaced by equal amounts of environmentally friendly and degradable ink vehicle products provided in Examples 2-8.

[0078] Comparative Application Example 1

[0079] Comparative Application Example 1 provides a water-based ink, which is consistent with Application Example 1 except that the environmentally friendly and degradable ink binder product provided in Example 1 is replaced with an equal amount of modified SPI powder in Example 1.

[0080] Comparative Application Example 2

[0081] Comparative Application Example 2 provides a water-based ink, which is consistent with Application Example 1 except that the environmentally friendly and degradable ink binder product provided in Example 1 is replaced with an equal amount of alkali-soluble acrylic resin.

[0082] Effect test:

[0083] The COD (mg / L) and BOD5 (mg / L) values ​​during the degradation of ink were obtained using the standards "GB / T15456-2019 Industrial circulating cooling water - Determination of chemical oxygen demand (COD) - Permanganate index method" and "GB / T7488-1987 Water quality - Determination of biochemical oxygen demand (BOD5) within five days - Dilution and inoculation method", and the ink biodegradation index was obtained using formula 1-1:

[0084]

[0085] The national standard "Test method for ink fineness GB / T13217.3-2022" is used to measure the ink fineness;

[0086] The viscosity of the ink was measured using the national standard "Adhesive viscosity test method - Rotational viscometer method GB / T22296-2008".

[0087] The test results are as follows (due to the lack of ultrasonic treatment in Application Example 6, SPI modification is difficult, and the finished product is too viscous to proceed to the next step; in contrast, Application Example 1 does not contain an alkali-soluble acrylic resin, and the color development effect is poor, which cannot meet the ink requirements):

[0088]

[0089] Note:

[0090] ① The biodegradability of water-based flexographic ink is evaluated according to QB / T2993-2008: index ≥ 0.45 is easily biodegradable (green printing certification requirement), 0.30 < index ≤ 0.44 is biodegradable (industrial grade qualified), index < 0.30 is difficult to biodegrade (special treatment required);

[0091] ② The fineness performance evaluation of water-based flexographic ink is based on ISO 2834-2: the qualified range is 15-25μm, and the excellent range is ≤15μm;

[0092] ③ The viscosity performance evaluation of water-based flexographic ink is based on GB / T13217.4: the qualified range is 1500-3500mPa·s;

[0093] Comparing application examples 1, 4, and 5, it was found that with the gradual increase of the solution pH value (4-1-5), the ink biodegradation index did not change significantly, the ink fineness gradually decreased, and the ink viscosity decreased significantly.

[0094] By comparing application examples 1, 7, and 8, it was found that with the gradual increase of the rheological index n value (7-1-8), the content of modified SPI in the binder ratio gradually decreased, resulting in a gradual decrease in the ink biodegradation index, fineness, and ink viscosity.

[0095] From the above data, it can be found that the ink prepared by the environmentally friendly and degradable ink binder product provided by the present invention has higher biodegradability than traditional ink (Comparative Application Example 2), and at the same time has good ink fineness and viscosity, and does not have a negative impact on the ink effect; By comparing Application Examples 1-8, it can be found that the present invention can effectively improve the biodegradation rate of ink by processing SPI and controlling relevant parameters.

[0096] The applicant declares that the present invention uses the above-described embodiments to illustrate the environmentally friendly and degradable ink vehicle product, its manufacturing method, and its application. However, the present invention is not limited to the above-described embodiments, which does not necessarily mean that the present invention must rely on the above-described embodiments for implementation. Those skilled in the art should understand that any improvements to the present invention, equivalent replacements for various raw materials in the present invention, additions of auxiliary ingredients, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

[0097] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0098] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A method for manufacturing an environmentally friendly and degradable ink vehicle product, characterized in that: The method for manufacturing the environmentally friendly and degradable ink vehicle product comprises the following steps: (1) mixing soy protein isolate with water, then mixing with ammonia water, and drying to obtain modified soy protein isolate; (2) The modified soy protein isolate obtained in step (1) is mixed with an alkali-soluble acrylic resin to obtain the environmentally friendly and degradable ink binder product.

2. The method for manufacturing an environmentally friendly and degradable ink vehicle product according to claim 1, characterized in that: After the soy protein isolate is mixed with water in step (1), the solid content of the mixture is 8-12%.

3. The method for manufacturing an environmentally friendly and degradable ink vehicle product according to claim 1 or 2, characterized in that: After the soy protein isolate is mixed with water in step (1), the mixture is subjected to heat treatment and / or mechanical shearing treatment.

4. The method for manufacturing an environmentally friendly and degradable ink vehicle product according to claim 3, characterized in that: The heat treatment temperature is 40-100°C and the time is 10-50 minutes; Preferably, the mechanical shearing treatment comprises ultrasound and / or homogenization; Preferably, the ultrasonication time is 10-40 min; Preferably, the homogenization time is 5-30 minutes.

5. The method for manufacturing an environmentally friendly and degradable ink vehicle product according to any one of claims 1 to 4, characterized in that: After mixing with ammonia water in step (1), the pH of the mixed system is 11.6-12.8; Preferably, the stirring time in step (1) is 30-60 min.

6. The method for manufacturing an environmentally friendly and degradable ink vehicle product according to any one of claims 1 to 5, characterized in that: After mixing with the alkali-soluble acrylic resin in step (2), the product has a rheological index n value of 0.7-1.

3.

7. An environmentally friendly and degradable ink vehicle product manufactured by the manufacturing method according to any one of claims 1 to 6.

8. Use of the environmentally friendly and degradable ink vehicle product according to claim 7 in the preparation of ink.

9. A water-based ink, characterized in that: The water-based ink includes the environmentally friendly and degradable ink vehicle product according to claim 7.

10. The water-based ink according to claim 9, characterized in that: The water-based ink comprises, by weight, 60-70 parts of the environmentally friendly and degradable ink binder product according to claim 7, 15-20 parts of pigment, 0.5-1 part of wetting agent, 0.2-0.5 part of defoaming agent, 1-2 parts of thickener and 0.5-1 part of dispersion stabilizer.

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