Treatment liquid for digital printing primer and preparation method thereof

Abstract

The present invention discloses a treatment liquid for digital printing primer and a preparation method thereof, and relates to the field of textile treatment agents. The treatment liquid for digital printing primer is prepared from raw materials including 35-50 parts by weight of acrylic acid, 225-275 parts by weight of acrylate monomers, 62-88 parts by weight of acrylamide, 36-48 parts by weight of polybutylene itaconate, 12-24 parts by weight of olefinic silicone oil, 2-4 parts by weight of initiator, 4-8 parts by weight of emulsifier and 500 parts by weight of water; the acrylate monomers include long-chain alkyl acrylate, perfluoromethyl acrylate and hydroxy acrylate in a weight ratio of (4-5): (2-4): (2-3). The treatment liquid for digital printing primer in the present application can be firmly attached to different fabrics, and can hinder the penetration of digital ink after film formation, which is conducive to obtaining a printing pattern with high clarity and good consistency.

Description

Technical Field

[0001] The present application relates to the field of textile treatment agents, and in particular to a treatment liquid for digital printing primer and a preparation method thereof. Background Art

[0002] When digital ink is used for digital printing on fabrics, the digital ink easily flows along the pores of the fibers on the fabric, causing the digital ink to seep, making it difficult to maintain consistent clarity of the printed pattern during the digital printing process, that is, the digital printing quality of the fabric is difficult to guarantee. Summary of the invention

[0003] In order to improve the problem of digital ink seepage that easily occurs on fabrics during digital printing in the related art, the present application provides a treatment liquid for digital printing primer and a preparation method thereof.

[0004] In the first aspect, the present application provides a digital printing primer treatment liquid using the following technical solution:

[0005] A treatment liquid for digital printing primer is prepared from raw materials including 35-50 parts by weight of acrylic acid, 225-275 parts by weight of acrylate monomers, 62-88 parts by weight of acrylamide, 36-48 parts by weight of polybutylene glycol itaconate, 12-24 parts by weight of olefinic silicone oil, 2-4 parts by weight of initiator, 4-8 parts by weight of emulsifier and 500 parts by weight of water; wherein the acrylate monomers include long-chain alkyl acrylate, perfluoromethyl acrylate and hydroxy acrylate, and the weight ratio of the long-chain alkyl acrylate, perfluoromethyl acrylate and hydroxy acrylate is (4-5):(2-4):(2-3).

[0006] In the present application, the treatment liquid for digital printing primer uses a copolymer of acrylic acid, long-chain alkyl acrylate, perfluoromethyl acrylate, hydroxy acrylate, acrylamide, polybutylene glycol itaconate and olefinic silicone oil. The copolymer can adhere firmly to different fabrics and hinder the penetration of digital ink after film formation, which is conducive to obtaining a printing pattern with high clarity and good consistency.

[0007] Preferably, the structural formula of the polybutylene itaconate is as follows:

[0008]

[0009] The value range of n is 2 or 3.

[0010] In the present application, the number of double bonds of polybutylene glycol itaconate is controlled within the range of 2-3, which can ensure the clarity of digital printing while improving the air permeability and flexibility of the digital printing primer treatment liquid after film formation, so that the fabric still maintains good air permeability and softness after pre-treatment with the digital printing primer treatment liquid.

[0011] Preferably, the olefinic silicone oil comprises alkenyltrialkoxysilane and monoacrylate-terminated silicone oil, and the weight ratio of the alkenyltrialkoxysilane to the monoacrylate-terminated silicone oil is 1:(3-4).

[0012] In the present application, the olefinic silicone oil adopts a composition of alkenyltrialkoxysilane and monoacrylate-terminated silicone oil in a weight ratio of 1: (3-4), which is beneficial to further improve the flexibility and air permeability of the digital printing primer treatment liquid after film formation, so that the fabric still maintains excellent softness after pre-treatment with the digital printing primer treatment liquid.

[0013] Optionally, the alkenyltrialkoxysilane is at least one of vinyltrimethoxysilane and acryltrimethoxysilane.

[0014] In the present application, the alkenyltrialkoxysilane preferably uses vinyltrimethoxysilane and acryltrimethoxysilane, which have relatively small steric hindrance, and are conducive to copolymerization with other monomers at a relatively low temperature.

[0015] Preferably, the long-chain alkyl acrylate is at least one of decyl acrylate, undecyl acrylate, dodecyl acrylate and tridecyl acrylate.

[0016] In the present application, the long-chain alkyl acrylate is preferably decyl acrylate, undecyl acrylate, dodecyl acrylate, tridecyl acrylate, which is conducive to obtaining a digital printing primer treatment liquid that can effectively hinder the penetration of digital ink.

[0017] Optionally, the perfluoromethacrylate is at least one of dodecafluoroheptyl methacrylate and tridecafluorooctyl methacrylate.

[0018] In the present application, the perfluoromethacrylate uses at least one of dodecafluoroheptyl methacrylate and tridecafluorooctyl methacrylate, which is conducive to obtaining a digital printing primer treatment liquid that can effectively hinder the penetration of digital ink.

[0019] Optionally, the hydroxyacrylate is at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate and hydroxypropyl methacrylate.

[0020] In the present application, the addition of hydroxy acrylate is beneficial to improving the bonding stability between the digital printing primer treatment liquid and the fabric, and is beneficial to improving the connection stability between the digital ink and the fabric.

[0021] Optionally, the initiator is at least one of ammonium persulfate, sodium persulfate, and potassium persulfate.

[0022] Optionally, the emulsifier includes an anionic surfactant and a nonionic surfactant, and the weight ratio of the anionic surfactant to the nonionic surfactant is 1:(2-3).

[0023] In the present application, the emulsifier is a composition of anionic surfactant and nonionic surfactant in a weight ratio of 1: (2-3), which is beneficial to improve the stability of the treatment liquid for digital printing primer.

[0024] In the second aspect, the present application provides a method for preparing a treatment liquid for digital printing primer using the following technical solution:

[0025] A method for preparing a treatment liquid for digital printing primer comprises the following steps:

[0026] The initiator solution is prepared by mixing the initiator with 20-40% of the total amount of water;

[0027] mixing the emulsifier with the remaining water to prepare an emulsifier solution;

[0028] Acrylic acid, acrylate monomers, acrylamide, polybutylene glycol itaconate and olefinic silicone oil are added to the emulsifier solution, stirred evenly, and then the initiator solution is added dropwise. The temperature is controlled at 78-85° C. to react to obtain a treatment solution for digital printing primer.

[0029] The present application adopts the above method to prepare the digital printing primer treatment liquid, which is conducive to obtaining the digital printing primer treatment liquid that can hinder the penetration of digital ink after the film is obtained.

[0030] In summary, the technical solution of this application includes at least the following beneficial technical effects:

[0031] (1) The present application, with the cooperation of acrylic acid, long-chain alkyl acrylate, perfluoromethyl methacrylate, hydroxy acrylate, acrylamide, polybutylene glycol itaconate and olefinic silicone oil, can obtain a digital printing primer treatment liquid that can effectively hinder the penetration of digital ink after film formation, which is beneficial to obtain a printing pattern with high clarity and good consistency in the subsequent digital printing process.

[0032] (2) In the present application, the number of double bonds of polybutylene glycol is controlled within the range of 2-3, which can improve the air permeability and flexibility of the digital printing primer after film formation while ensuring the clarity of the digital printing, so that the fabric can still maintain good air permeability and softness after pre-treatment with the digital printing primer. DETAILED DESCRIPTION

[0033] The present application is further described below in conjunction with specific experiments.

[0034] Example

[0035] [Example 1]

[0036] A treatment liquid for digital printing primer, comprising the following raw materials:

[0037] Acrylic acid: 35kg;

[0038] Acrylate monomer: 275 kg; in this embodiment, the acrylate monomer includes undecyl acrylate, dodecafluoroheptyl methacrylate and hydroxyethyl acrylate, and the weight ratio of undecyl acrylate, dodecafluoroheptyl methacrylate and hydroxyethyl acrylate is 4:4:2;

[0039] Acrylamide: 62kg;

[0040] Polybutylene glycol itaconate: 48 kg; In this embodiment, the structural formula of polybutylene glycol itaconate is as follows:

[0041] n is 5;

[0042] Olefinic silicone oil: 12 kg; in this embodiment, the olefinic silicone oil is specifically vinyltrimethoxysilane;

[0043] Initiator: 2 kg; in this embodiment, the initiator is specifically sodium persulfate;

[0044] Emulsifier: 4 kg; In this embodiment, the emulsifier is a composition of sodium dodecylbenzene sulfonate and polyoxyethylene dodecylphenol ether OP-10, and the weight ratio of sodium dodecylbenzene sulfonate to polyoxyethylene dodecylphenol ether OP-10 is 1:2;

[0045] Water: 500kg.

[0046] In this embodiment, the method for preparing the treatment liquid for digital printing primer comprises the following steps:

[0047] The initiator solution was prepared by mixing the initiator with 20% of the total amount of water;

[0048] mixing the emulsifier with the remaining water to prepare an emulsifier solution;

[0049] Acrylic acid, acrylate monomers, acrylamide, polybutylene glycol itaconate and olefinic silicone oil are added to the emulsifier solution, stirred evenly, and then the initiator solution is added dropwise. The temperature is controlled at 78°C to react for 4 hours to obtain a treatment solution for digital printing primer.

[0050] [Example 2]

[0051] A treatment liquid for digital printing primer, comprising the following raw materials:

[0052] Acrylic acid: 50kg;

[0053] Acrylate monomer: 225 kg; in this embodiment, the acrylate monomer includes undecyl acrylate, dodecafluoroheptyl methacrylate and hydroxypropyl acrylate, and the weight ratio of undecyl acrylate, dodecafluoroheptyl methacrylate and hydroxypropyl acrylate is 5:2:3;

[0054] Acrylamide: 88kg;

[0055] Polybutylene glycol itaconate: 36 kg; In this embodiment, the structural formula of polybutylene glycol itaconate is as follows:

[0056] n is 5;

[0057] Olefinic silicone oil: 24 kg; in this embodiment, the olefinic silicone oil specifically uses monoacrylate-terminated silicone oil IOTA2205; Initiator: 4 kg; in this embodiment, the initiator specifically uses potassium persulfate;

[0058] Emulsifier: 8 kg; In this embodiment, the emulsifier is a composition of sodium dodecylbenzene sulfonate and polyoxyethylene dodecylphenol ether OP-10, and the weight ratio of sodium dodecylbenzene sulfonate to polyoxyethylene dodecylphenol ether OP-10 is 1:3;

[0059] Water: 500kg.

[0060] In this embodiment, the method for preparing the treatment liquid for digital printing primer comprises the following steps:

[0061] The initiator solution was prepared by mixing the initiator with 40% of the total amount of water;

[0062] mixing the emulsifier with the remaining water to prepare an emulsifier solution;

[0063] Acrylic acid, acrylate monomers, acrylamide, polybutylene glycol itaconate and olefinic silicone oil are added to the emulsifier solution, stirred evenly, and then the initiator solution is added dropwise. The temperature is controlled at 85° C. to react for 3.5 hours to obtain a treatment solution for digital printing primer.

[0064] [Example 3]

[0065] A treatment liquid for digital printing primer, which differs from [Example 1] in that:

[0066] In this embodiment, the structural formula of polybutylene glycol itaconate is as follows:

[0067] n is 2.

[0068] [Example 4]

[0069] A treatment liquid for digital printing primer, which differs from [Example 1] in that:

[0070] In this embodiment, the structural formula of polybutylene glycol itaconate is as follows:

[0071] n is 3.

[0072] [Example 5]

[0073] A treatment liquid for digital printing primer, which differs from [Example 4] in that:

[0074] The olefinic silicone oil specifically adopts monoacrylate-terminated silicone oil IOTA 2205.

[0075] [Example 6]

[0076] A treatment liquid for digital printing primer, which differs from [Example 4] in that:

[0077] The olefinic silicone oil specifically adopts a composition of vinyl trimethoxy silane and monoacrylate end-capped silicone oil IOTA 2205, and the weight ratio of vinyl trimethoxy silane to monoacrylate end-capped silicone oil IOTA 2205 is 3:1.

[0078] [Example 7]

[0079] A treatment liquid for digital printing primer, which differs from [Example 4] in that:

[0080] The olefinic silicone oil specifically adopts a composition of vinyl trimethoxy silane and monoacrylate end-capped silicone oil IOTA 2205, and the weight ratio of vinyl trimethoxy silane to monoacrylate end-capped silicone oil IOTA 2205 is 1:3.

[0081] Comparative Example

[0082] [Comparative Example 1]

[0083] A treatment liquid for digital printing primer, which differs from [Example 1] in that:

[0084] Acrylamide was replaced by an equal amount of ethyl acrylate.

[0085] [Comparative Example 2]

[0086] A treatment liquid for digital printing primer, which differs from [Example 1] in that:

[0087] Undecyl acrylate was replaced by an equal amount of dodecafluoroheptyl methacrylate.

[0088] [Comparative Example 3]

[0089] A treatment liquid for digital printing primer, which differs from [Example 1] in that:

[0090] Dodecafluoroheptyl methacrylate was replaced by an equal amount of undecyl acrylate.

[0091] [Comparative Example 4]

[0092] A treatment liquid for digital printing primer, which differs from [Example 1] in that:

[0093] Polybutylene itaconate was replaced by an equal amount of ethyl acrylate.

[0094] [Comparative Example 5]

[0095] A treatment liquid for digital printing primer, which differs from [Example 1] in that:

[0096] The olefinic silicone oil was replaced by an equal amount of ethyl acrylate.

[0097] [Comparative Example 6]

[0098] A treatment liquid for digital printing primer, which differs from [Example 1] in that the ratios of the components in the acrylic ester monomer, the ratio of acrylamide, the ratio of polybutylene itaconate and the ratio of olefinic silicone oil are different.

[0099] In this comparative example, the treatment liquid for digital printing primer includes the following raw materials:

[0100] Acrylic acid: 35kg;

[0101] Acrylate monomer: 275 kg; in this embodiment, the acrylate monomer includes undecyl acrylate, dodecafluoroheptyl methacrylate and hydroxyethyl acrylate, and the weight ratio of undecyl acrylate, dodecafluoroheptyl methacrylate and hydroxyethyl acrylate is 2:2:6;

[0102] Acrylamide: 30kg;

[0103] Polybutylene glycol itaconate: 28 kg; In this embodiment, the structural formula of polybutylene glycol itaconate is as follows:

[0104] n is 5;

[0105] Olefinic silicone oil: 42 kg; in this embodiment, the olefinic silicone oil is specifically vinyl trimethoxy silane;

[0106] Initiator: 2 kg; in this embodiment, the initiator is specifically sodium persulfate;

[0107] Emulsifier: 4 kg; In this embodiment, the emulsifier is a composition of sodium dodecylbenzene sulfonate and polyoxyethylene dodecylphenol ether OP-10, and the weight ratio of sodium dodecylbenzene sulfonate to polyoxyethylene dodecylphenol ether OP-10 is 1:2;

[0108] Water: 500kg.

[0109] Performance testing

[0110] (1) Digital printing quality: After the silk fabric is pre-treated with the digital printing primer treatment liquid in each embodiment and comparative example and dried, the pre-treated silk fabric is sprayed with printing ink using a digital inkjet process. After the printing ink is dried, a test sample A is obtained (in the process of preparing the test sample A, except for the different digital printing primer treatment liquid, other process conditions remain the same). Ten finished products obtained by inkjetting after being treated with the digital printing primer treatment liquid corresponding to each embodiment and comparative example are randomly selected and compared with the standard digital printing pattern. If the digital printing patterns of the 10 finished products are all clear and complete, the digital printing quality is qualified, otherwise it is unqualified.

[0111] 1. Decrease in air permeability: The silk fabric was pretreated with the digital printing primer treatment liquid in each embodiment and the comparative example and dried, and the air permeability of the silk fabric before and after pretreatment was tested with reference to ASTM D737-2018 "Standard Test Method for Air Permeability of Textile Fabrics", and the decrease in air permeability of the silk fabric before and after pretreatment was recorded. The test pressure difference was 125 Pa.

[0112] 2. Fabric softness: The fabric was pretreated with the digital printing primer treatment liquid in each embodiment and the comparative example and dried, and 10 experts in the industry were judged to score the softness of the silk fabric before and after pretreatment. The score was divided into 6 levels, 5-6 points for E level (excluding 6 points), 6-7 points for D level (excluding 7 points), 7-8 points for C level (excluding 8 points), 8-9 points for B level (excluding 9 points), and 9-10 points for A level.

[0113] Table 1

[0114]

[0115]

[0116] According to Example 1 and Comparative Examples 1-6 and combined with the results in Table 1, it can be seen that the digital printing primer treatment liquid in the present application that can effectively hinder the penetration of digital ink depends on the combination of long-chain alkyl acrylate, perfluoromethyl methacrylate, hydroxy acrylate, acrylamide, polybutylene glycol itaconate and olefinic silicone oil, etc. In addition, the same raw materials but different proportions will also significantly affect the anti-seepage performance of the digital printing primer treatment liquid.

[0117] According to Example 1 and Example 3-4 and combined with the results in Table 1, it can be seen that the number of double bonds in polybutylene glycol itaconate affects the flexibility and air permeability of the digital printing primer treatment liquid. Among them, controlling the number of double bonds of polybutylene glycol itaconate within the range of 2-3 can improve the air permeability and flexibility of the digital printing primer treatment liquid after film formation while ensuring the clarity of digital printing, so that the fabric still maintains good air permeability and softness after pre-treatment with the digital printing primer treatment liquid.

[0118] According to Examples 4 and 5-7 and in combination with the results in Table 1, it can be seen that the olefinic silicone oil using an olefinic trialkoxysilane and a monoacrylate-terminated silicone oil in a weight ratio of 1: (3-4) is beneficial to further improve the flexibility and air permeability of the digital printing primer treatment liquid after film formation, so that the fabric still maintains excellent softness after pre-treatment with the digital printing primer treatment liquid.

[0119] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A treatment liquid for digital printing primer, characterized in that: The invention is prepared from raw materials including 35-50 parts by weight of acrylic acid, 225-275 parts by weight of acrylic acid ester monomers, 62-88 parts by weight of acrylamide, 36-48 parts by weight of polybutylene glycol itaconate, 12-24 parts by weight of olefinic silicone oil, 2-4 parts by weight of initiator, 4-8 parts by weight of emulsifier and 500 parts by weight of water; wherein the acrylic acid ester monomers include long-chain alkyl acrylate, perfluoromethyl acrylate and hydroxy acrylate, and the weight ratio of the long-chain alkyl acrylate, perfluoromethyl acrylate and hydroxy acrylate is (4-5):(2-4):(2-3); The structural formula of the polybutylene itaconate is as follows: Among them, the value range of n is 2 or 3; The olefinic silicone oil comprises alkenyltrialkoxysilane and monoacrylate-terminated silicone oil, and the weight ratio of the alkenyltrialkoxysilane to the monoacrylate-terminated silicone oil is 1:(3-4).

2. The digital printing primer treatment liquid according to claim 1, characterized in that: The alkenyltrialkoxysilane is at least one of vinyltrimethoxysilane and acryltrimethoxysilane.

3. The digital printing primer treatment liquid according to claim 1, characterized in that: The long-chain alkyl acrylate is at least one of decyl acrylate, undecyl acrylate, dodecyl acrylate and tridecyl acrylate.

4. The digital printing primer treatment liquid according to claim 1, characterized in that: The perfluoromethacrylate is at least one of dodecafluoroheptyl methacrylate and tridecafluorooctyl methacrylate.

5. The digital printing primer treatment liquid according to claim 1, characterized in that: The hydroxy acrylate is at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate and hydroxypropyl methacrylate.

6. The digital printing primer treatment liquid according to claim 1, characterized in that: The initiator is at least one of ammonium persulfate, sodium persulfate and potassium persulfate.

7. The digital printing primer treatment liquid according to claim 1, characterized in that: The emulsifier comprises an anionic surfactant and a nonionic surfactant, and the weight ratio of the anionic surfactant to the nonionic surfactant is 1:(2-3).

8. A method for preparing a treatment liquid for digital printing primer according to any one of claims 1 to 7, characterized in that: The following steps are involved: mixing an initiator with a portion of water to prepare an initiator solution; mixing the emulsifier with the remaining water to prepare an emulsifier solution; Acrylic acid, acrylate monomers, acrylamide, polybutylene glycol itaconate and olefinic silicone oil are added to the emulsifier solution, stirred evenly, and then the initiator solution is added dropwise. The temperature is controlled at 78-85° C. to react to obtain a treatment solution for digital printing primer.

Images