Aqueous textile coating adhesive and method for its preparation

Abstract

The application provides a water-based textile coating glue and a preparation method thereof, relates to the field of textile finishing coating technology, and solves the technical problem that the existing coating glue needs to be used in combination with a release film, so that the efficiency of the textile finishing coating process is low. The water-based textile coating glue is composed of the following components in mass fraction: 70-80 parts of high-solid-content water-based polyurethane emulsion; 5-10 parts of high-molecular-polymer-modified silicon dioxide; 5-10 parts of hydrophilic group-modified wax emulsion; 2-5 parts of water-soluble amino-modified silicone oil; 0-1 part of wetting agent; 0-0.1 part of defoaming agent; 0.2-1 part of non-ionic thickening agent; and 0-0.2 part of bactericide. The water-based textile coating glue is stable in performance, non-toxic, non-odor, safe, environmentally friendly, and does not need to be used in combination with a release film (polyethylene film) in the use process, so that the textile product has good gloss and true skin degree, and the production efficiency of the workshop product is significantly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile finishing coating glue, in particular to a water-based textile coating glue and a preparation method thereof. BACKGROUND

[0002] With the continuous improvement of people's living standards, people's requirements for wearing are also getting higher and higher, and many fabrics require to be endowed with special functions. Textile embossing finishing can endow textile fabrics with rich style and function. Coating finishing is a finishing processing technology that uniformly coats one or more layers of high polymer compound coating finishing agent on the surface of textile fabric on one side or both sides, and forms one or more layers of film on the surface of the fabric through adhesion. Coating finishing can improve the hand feeling, appearance and style of the fabric, and increase many new functions of the fabric, such as windproof, waterproof, moisture permeable and the like. It is a surface finishing technology that can produce different functions on the front and back of the fabric.

[0003] Coating finishing agent, also known as coating glue, is a synthetic polymer with film-forming properties. Different types of coating glue have different properties. According to the different media used, it is divided into solvent type and water-based type. Solvent type has the advantages of high water pressure resistance, good film-forming property, fast drying and the like. At present, textile coating finishing plants basically use solvent type oil-based glue. However, it has the disadvantages of high toxicity, generation of a large amount of waste gas, strong odor in the production workshop, and the like. In addition, the existing water-based coating glue also needs to use release film for heat preservation before the appearance of the true skin feeling and gloss, which results in low production efficiency. SUMMARY

[0004] The purpose of the present application is to provide a water-based textile coating glue and a preparation method thereof, so as to solve the technical problem in the prior art that the coating glue needs to be used in combination with release film, resulting in low efficiency of the textile coating finishing process. The preferred technical solutions in the technical solutions provided by the present application can produce the technical effects as described below.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions.

[0006] In a first aspect, the present application provides a water-based textile coating glue, which is composed of the following components in mass fraction:

[0007] 70-80 parts of high solid content water-based polyurethane emulsion;

[0008] 5-10 parts of high molecular polymer modified silica;

[0009] 5-10 parts of hydrophilic group modified wax emulsion;

[0010] Water-soluble amino-modified silicone oil 2-5 parts;

[0011] Wetting agent 0-1 part;

[0012] Defoaming agent 0-0.1 part;

[0013] Non-ionic thickening agent 0.2-1 part;

[0014] Bactericide 0-0.2 part.

[0015] According to a preferred embodiment, the high-solid waterborne polyurethane emulsion is a waterborne polyurethane emulsion with a solid content of 50% or more.

[0016] According to a preferred embodiment, the high-molecular polymer-modified silica includes a polyethylene wax-modified silica powder or a polyamide wax-modified silica powder, wherein the silica includes at least one of fumed silica, gel silica, and precipitated silica.

[0017] According to a preferred embodiment, the hydrophilic group-modified wax emulsion includes at least one of a polyethylene wax emulsion, a paraffin wax emulsion, and a polyamide wax emulsion.

[0018] According to a preferred embodiment, the water-soluble amino-modified silicone oil includes at least one of a polyoxyethylene group, a polyoxypropylene group, and a fatty alcohol polyoxyethylene polyoxypropylene ether group-modified silicone oil.

[0019] According to a preferred embodiment, the defoaming agent includes at least one of a mineral oil-based or silicone-based defoaming agent.

[0020] According to a preferred embodiment, the non-ionic thickening agent includes at least one of a polyurethane-based, cellulose-based, bentonite, or fumed silica.

[0021] According to a preferred embodiment, the bactericide includes at least one of a chlorophenol-based or isothiazolinone-based bactericide.

[0022] In a second aspect, the present application further provides a preparation method of a waterborne textile coating glue, including the following steps:

[0023] Step (a): mixing water and a high-solid waterborne polyurethane emulsion to obtain a uniformly dispersed water-soluble polyurethane polymer solution;

[0024] Step (b): adding high-molecular polymer-modified silica to the water-soluble polyurethane polymer solution and uniformly dispersing at high speed to obtain a milky white waterborne polyurethane mixture;

[0025] Step (c): adding a defoaming agent to the waterborne polyurethane mixture of step (b) and stirring at low speed until the surface foam disappears;

[0026] Step (d): adding thickening agent into the aqueous polyurethane mixture of step (c) to obtain a flowable viscous liquid with viscosity of 2000 mpa.s;

[0027] Step (e): adding amino-modified silicone oil and hydrophilic group-modified wax emulsion into the flowable viscous liquid of step (d), uniformly dispersing and then standing;

[0028] Step (f): adding bactericide and wetting agent into the mixture of step (e), uniformly stirring, filtering and then obtaining a milky white viscous coating glue.

[0029] Based on the above technical solution, the aqueous textile coating glue and the preparation method thereof have at least the following technical effects:

[0030] The aqueous textile coating glue comprises the following components in mass fraction: 70-80 parts of high-solid-content aqueous polyurethane emulsion; 5-10 parts of high-molecular-polymer-modified silicon dioxide; 5-10 parts of hydrophilic group-modified wax emulsion; 2-5 parts of water-soluble amino-modified silicone oil; 0-1 part of wetting agent; 0-0.1 part of defoaming agent; 2-5 parts of non-ionic thickening agent; and 0-0.2 part of bactericide. The aqueous polyurethane emulsion used in the present application has high solid content and high film thickness, and can form a certain thickness of glue film on the surface of the cloth to reflect the skin feeling. The melting point of the added hydrophilic group-modified wax emulsion is above 110 DEG C, the low surface energy in the drying process is migrated to the surface of the aqueous polyurethane glue film, and is re-melted by the hot roller to form a transparent surface film, thereby replacing the release film. The leather hand feeling given by the aqueous amino silicone oil can solve the gloss and leather hand feeling. The aqueous textile coating glue has stable performance, is non-toxic and odorless, is safe and environmentally friendly, and does not need to use release film (polyethylene film) in the use process, so that the textile has good gloss and leather degree, and the production efficiency of the workshop product is significantly improved. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0032] The present application provides an aqueous textile coating glue, which is composed of the following components in mass fraction:

[0033] 70-80 parts of high-solid-content aqueous polyurethane emulsion;

[0034] 5-10 parts of high-molecular-polymer-modified silicon dioxide;

[0035] hydrophilic group modified wax emulsion 5-10 parts;

[0036] water-soluble amino modified silicone oil 2-5 parts;

[0037] wetting agent 0-1 part;

[0038] antifoaming agent 0-0.1 part;

[0039] non-ionic thickening agent 0.2-1 part;

[0040] bactericide 0-0.2 part.

[0041] The water-based textile coating glue is composed of the following components by mass fraction: high solid content water-based polyurethane emulsion 70-80 parts; high molecular polymer modified silica 5-10 parts; hydrophilic group modified wax emulsion 5-10 parts; water-soluble amino modified silicone oil 2-5 parts; wetting agent 0-1 part; antifoaming agent 0-0.1 part; non-ionic thickening agent 0.2-1 part; bactericide 0-0.2 part. The water-based polyurethane emulsion used in the present application has high solid content and high film forming thickness, and can form a certain thickness of glue film on the surface of the cloth to realize the skin feeling. The melting point of the added hydrophilic group modified wax emulsion is above 110℃, the low surface energy in the drying process, migrates to the surface of the water-based polyurethane glue film, and is re-melted by the hot roller to form a transparent surface film, thereby replacing the release film. The leather hand feeling given by the water-based amino silicone oil can solve the gloss and leather hand feeling. The water-based textile coating glue of the present application has stable performance, is non-toxic and odorless, is safe and environmentally friendly, and does not need to use a release film (polyethylene film) during use, so that the textile has good gloss and leather degree, and significantly improves the production efficiency of the workshop product.

[0042] Preferably, the high solid content water-based polyurethane emulsion is a water-based polyurethane emulsion with a solid content of 50% or more. Preferably, the high molecular polymer modified silica includes polyethylene wax modified silica powder or polyamide wax modified silica powder, wherein the silica includes at least one of fumed silica, gel silica and precipitated silica. Preferably, the hydrophilic group modified wax emulsion includes at least one of polyethylene wax emulsion, paraffin wax emulsion and polyamide wax emulsion. Preferably, the water-soluble amino modified silicone oil includes at least one of polyoxyethylene group, polyoxypropylene group and fatty alcohol polyoxyethylene polyoxypropylene ether group modified silicone oil. Preferably, the antifoaming agent includes at least one of mineral oil or silicone antifoaming agent. Preferably, the non-ionic thickening agent includes at least one of polyurethane, cellulose, bentonite or fumed silica. Preferably, the bactericide includes at least one of chlorophenol or isothiazolinone bactericide.

[0043] In a second aspect, the present application provides a preparation method of a water-based textile coating glue, including the following steps:

[0044] Step (a): mixing water and high solid content aqueous polyurethane emulsion to obtain uniformly dispersed aqueous polyurethane polymer solution;

[0045] Step (b): adding high molecular polymer modified silica to the aqueous polyurethane polymer solution and uniformly dispersing at high speed to obtain milky white aqueous polyurethane mixture;

[0046] Step (c): adding defoaming agent to the aqueous polyurethane mixture of step (b) and stirring at low speed until the surface foam disappears;

[0047] Step (d): adding thickening agent to the aqueous polyurethane mixture of step (c) to obtain flowable viscous liquid with a viscosity of 2000 mpa.s;

[0048] Step (e): adding amino-modified silicone oil and hydrophilic group modified wax emulsion to the flowable viscous liquid obtained in step (d) and uniformly dispersing and standing;

[0049] Step (f): adding bactericide and wetting agent to the mixture of step (e), stirring uniformly, filtering and obtaining milky white viscous coating glue.

[0050] Specifically, the preparation method of the aqueous textile coating glue of the present application comprises the following steps:

[0051] (1) First, 5-10 parts of water is mixed with 70-80 parts of high solid content aqueous polyurethane emulsion to obtain uniformly dispersed aqueous polyurethane polymer solution. The high solid content aqueous polyurethane emulsion is an aqueous polyurethane emulsion with a solid content of more than 50%.

[0052] (2) 5-10 parts of high molecular polymer modified silica powder is sequentially added to the above-mentioned aqueous polyurethane polymer solution, uniformly dispersed at high speed and obtained as milky white liquid. The high molecular polymer modified silica can be polyethylene wax or polyamide wax modified silica powder, and the silica can be at least one of fumed silica, gel silica and precipitated silica.

[0053] (3) 0-0.1 parts of defoaming agent is added to the aqueous polyurethane mixture for defoaming, and then stirred at low speed until the surface foam disappears. The defoaming agent can be one or more of mineral oil or silicone defoaming agent.

[0054] (4) Then, 0.2-1 parts of non-ionic thickening agent is added to the above-mentioned polyurethane mixture for thickening to obtain flowable viscous liquid with a viscosity of 2600-3000 mpa.s. The non-ionic thickening agent can be at least one of polyurethane, cellulose, bentonite and fumed silica.

[0055] (5) Then gradually add 2-5 parts of amino-modified silicone oil and 5-10 parts of hydrophilic group-modified wax emulsion, uniformly disperse and then stand. The amino-modified silicone oil can be at least one of polyoxyethylene group or polyoxypropylene group, fatty alcohol polyoxyethylene polyoxypropylene ether group silicone oil. The hydrophilic group-modified wax emulsion is at least one of polyethylene wax emulsion, paraffin wax emulsion and polyamide wax emulsion.

[0056] (6) Then add 0-0.2 parts of water-soluble bactericide and 0-1 part of silicone wetting agent, stir uniformly, filter and obtain a milky white viscous water-based textile embossing coating paste. The bactericide can be at least one of chlorophenol and isothiazolinone bactericide.

[0057] Examples

[0058] Hereinafter, the examples of the present application are described. The examples described below are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application. If the specific technology or condition is not specified in the examples, the technology or condition described in the literature in the art or according to the product instruction is used. If the reagent or instrument is not specified by the manufacturer, it is a conventional product that can be obtained by market purchase.

[0059] Example 1

[0060] The components of the water-based textile coating glue of the present embodiment include:

[0061] 70 parts of water-based polyurethane emulsion with 50% solid content,

[0062] 5 parts of polyethylene wax-modified silica,

[0063] 10 parts of polyethylene wax emulsion,

[0064] 5 parts of water-soluble amino-modified silicone oil,

[0065] 0.2 parts of silicone wetting agent,

[0066] 0.1 part of silicone defoamer,

[0067] 0.5 parts of acrylic thickening agent,

[0068] 0.2 parts of bactericide.

[0069] The preparation method of the water-based textile coating glue of the present embodiment is:

[0070] First, 9 parts of water is mixed with 70 parts of high solid waterborne polyurethane emulsion to obtain a uniform dispersion of polyurethane polymer aqueous solution, 5 parts of polyethylene wax modified silica powder is added into the polyurethane polymer aqueous solution in turn, and a milky white liquid is obtained after high-speed dispersion, 0.1 part of silicone defoaming agent is added to the waterborne polyurethane mixture to defoam, then low-speed stirring until the surface foam disappears, 0.5 parts of acrylic thickening agent is added to the polyurethane mixture to thicken, a viscous liquid with good stability is obtained, the viscosity is 2600-3000 mpa.s, then 5 parts of amino modified silicone oil and 10 parts of hydrophilic group modified wax emulsion are gradually added, and a milky white viscous waterborne textile coating adhesive is obtained after uniform dispersion, standing, and then adding 0.2 parts of water-soluble bactericide and 0.2 parts of silicone wetting agent and stirring uniformly.

[0071] Examples 2 to 5 are shown in Table 1 below, wherein Examples 2 and 3 are different from Example 1 in that the amount of the selected components is different, and Examples 4 and 5 are different from Example 1 in that the types and amounts of the selected components are different, and the waterborne textile coating adhesives of Examples 2 to 5 are prepared by the same preparation method as Example 1.

[0072] Table 1 Related parameters of the waterborne textile coating adhesives of Examples 1 to 5

[0073]

[0074] The gloss, touch, sedimentation, rubbing fastness, hiding rate, resistance to sunlight yellowing, and resistance to high temperature yellowing are tested according to the national standard, and the test results are shown in Table 2. Table 2 shows the performance of the waterborne textile coating adhesives prepared by Examples 1 to 5 of the present application. As can be seen from Table 2, the waterborne textile coating adhesives of the present application are qualified in gloss, touch, sedimentation, dry and wet rubbing fastness, alcohol wiping fastness, film hiding rate, resistance to sunlight yellowing, and resistance to high temperature yellowing. The waterborne textile coating adhesives of the present application do not need to use release film and can also have good gloss and true skin degree. The production efficiency of the finishing workshop product can be improved.

[0075] Table 2 Performance test of the waterborne textile coating adhesives of Examples 1 to 5

[0076] Test item Example 1 Example 2 Example 3 Example 4 Example 5 Gloss 1.2 2.2 1.6 0.8 2.3 Touch Dry rub Dry rub Dry rub Dry rub Dry rub Settling Good 5 Good 5 Good 5 Good 5 Good 5 Dry rub fastness 5 5 5 5 5 Wet rub fastness 4 4 4 4 4 Alcohol rub fastness 2 3 3 3 3 Film coverage 25.72 18 19.41 23.21 20.12 Resistance to yellowing by sunlight 3.80 (4) 3.80 (4) 3.40 (3) 3.60 (4) 4.12 (4) △b 1.64 1.64 1.64 1.64 1.64 Resistance to yellowing by high temperature 4.5 (4-5) 4.2 (4-5) 4.2 (4-5) 4.2 (4-5) 4.2 (4-5) △b 0.4 0.41 0.42 0.41 0.40

[0077] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A water-based textile coating adhesive, characterized in that, The coating adhesive is composed of the following components in parts by weight: 70-80 parts of waterborne polyurethane emulsion, wherein the waterborne polyurethane emulsion has a solid content of more than 50%; 5-10 parts of polymer-modified silica, wherein the polymer-modified silica includes polyethylene wax-modified silica powder or polyamide wax-modified silica powder, wherein the silica includes at least one of fumed silica, gel silica, and precipitated silica; and 5-10 parts of hydrophilic group-modified wax emulsion; The hydrophilic group modified wax emulsion includes at least one of polyethylene wax emulsion, paraffin wax emulsion, and polyamide wax emulsion; 2-5 parts of water-soluble amino-modified silicone oil, wherein the water-soluble amino-modified silicone oil includes at least one of polyoxyethylene, polyoxypropylene, and fatty alcohol polyoxyethylene polyoxypropylene ether-modified silicone oil; 0-1 part of wetting agent; 0-0.1 part of defoamer; 0.2-1 part of nonionic thickener, wherein the nonionic thickener includes at least one of polyurethane, cellulose, bentonite, or fumed silica; and 0-0.2 parts of bactericide. The preparation method of the water-based textile coating adhesive includes: Step (a): Mix water and an aqueous polyurethane emulsion with a solid content of more than 50% to obtain a uniformly dispersed aqueous solution of polyurethane polymer. Step (b): Add polymer-modified silica to the polyurethane polymer water solution. In the liquid, it is dispersed at high speed to obtain a milky white aqueous polyurethane mixture; Step (c): Add defoamer to the aqueous polyurethane mixture from step (b) and stir at low speed until the surface foam disappears; Step (d): Add a thickener to the aqueous polyurethane mixture from step (c) to obtain a fluid viscous liquid with a certain viscosity; Step (e): Add amino-modified silicone oil and hydrophilic group-modified wax emulsion to the fluid viscous liquid obtained in step (d), disperse evenly, and let stand. Step (f): Add bactericide and wetting agent to the mixture from step (e), stir well, and filter to obtain a milky white viscous coating adhesive.

2. The water-based textile coating adhesive according to claim 1, characterized in that, The defoamer includes at least one of mineral oil-based or organosilicon-based defoamers.

3. The water-based textile coating adhesive according to claim 1, characterized in that, The bactericide includes at least one of chlorophenol or isothiazolinone bactericides.

Images