CN109825653B - Transparent anti-sticking leather filler and preparation method and application thereof - Google Patents
Transparent anti-sticking leather filler and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to the technical field of leather processing, and belongs to a preparation method of a transparent anti-sticking filler for leather, which comprises the following steps: dispersing water and spherical silicon dioxide in stirring to obtain a first mixed solution, wherein the mass ratio of the water to the spherical silicon dioxide is 60-70: 20-24; adding a suspension stabilizer ASE60 into the first mixed solution, and continuously dispersing to obtain a second mixed solution, wherein the mass ratio of the spherical silicon dioxide to the suspension stabilizer ASE60 is 20-24: 2; and adjusting the pH value of the second mixed solution to 7.5-8.5. The transparent anti-sticking leather filler is prepared by adopting the preparation method of the transparent anti-sticking leather filler. When the leather transparent anti-sticking filler is applied to the effect coating in the leather processing process, the prepared leather has good glossiness and hand feeling, and the phenomenon of adhesion is avoided when the leather transparent anti-sticking filler is stacked.
Description
Technical Field
The invention relates to the technical field of leather processing, in particular to a transparent anti-sticking filler for leather, and a preparation method and application thereof.
Background
Currently, leathers having a special effect finish style are becoming more popular with customers. In the processing process of leather, batch of leather blanks are sprayed and dried, and leather surfaces are often stacked relatively together for the purpose of saving space, and then the leather blanks wait for the next step of treatment. In order to highlight the aesthetic degree and stereoscopic impression of the surface of the effect coating, the effect coating generally requires that a formed film is transparent and has good gloss, so the composition formula generally only contains high-light-transmittance resin and wax, the resin in the coating is very easy to adhere together in a damp and hot environment, and the deformation and tearing of the coating film occur during stripping, so the production cost is increased.
In the prior art, the problem of coating adhesion is generally improved by adding wax emulsion, inorganic filler or organic silicon and other auxiliaries, but the wax emulsion has the characteristics that the coating has moist and sticky feeling due to the large amount of the wax emulsion, the coating is easy to be stained with dirt such as dust and wool fibers, and the effect cannot be achieved when the amount of the wax emulsion is small; inorganic fillers generally have excellent anti-blocking effects, but most inorganic fillers have dulling properties, affect the gloss and color of the effect layer, and dry and rough hand feeling; the organic silicon has good anti-sticking effect, but most of the organic silicon has oily hand feeling which is greatly different from the natural comfortable feeling of the original coating, and the adhesion of the coating is influenced by a large amount of the organic silicon.
The sofa leather coating process is illustrated by taking a light-pressure falling sofa leather coating technology as an example: leather blank after water field treatment, repairing treatment, leather grinding, bottom sealing, ironing, roller coating of bottom slurry, isolation, embossing, milling, surface slurry spraying, spraying effect, brightness spraying and finished product.
Disclosure of Invention
The invention provides a leather transparent anti-sticking filler and a preparation method thereof, aiming at solving the problem that the leather is difficult to have good glossiness, good hand feeling and no adhesion phenomenon after the existing effect coating is applied to the leather.
The invention is realized by the following steps:
a method for preparing a transparent anti-sticking filler for leather comprises the following steps:
dispersing water and spherical silicon dioxide in stirring to obtain a first mixed solution, wherein the mass ratio of the water to the spherical silicon dioxide is 60-70: 20-24;
adding a suspension stabilizer ASE60 into the first mixed solution, and continuously dispersing to obtain a second mixed solution, wherein the mass ratio of the spherical silicon dioxide to the suspension stabilizer ASE60 is 20-24: 2;
and adjusting the pH value of the second mixed solution to 7.5-8.5.
The transparent anti-sticking leather filler is prepared by adopting the preparation method of the transparent anti-sticking leather filler.
The application of the leather transparent anti-sticking filler in the effect coating in the leather processing process.
The invention has the beneficial effects that: the preparation method of the leather transparent anti-sticking filler obtained by the design is simple to operate, and the spherical silicon dioxide is selected and combined with the reasonable operation method provided by the invention, so that the spherical silicon dioxide is suspended and dispersed on the surface of the film in the coating film forming process of the prepared leather transparent anti-sticking filler, and the direct contact of two leather blank coatings can be prevented, so that the adhesion between the coatings can be effectively prevented, and the smooth surface of the coating has the effects of dry and comfortable hand feeling but not rough, good glossiness, good transparency, full color and dry and non-rough surface.
The leather transparent anti-sticking filler obtained by the design is applied to leather to obtain a leather blank with higher gloss, better permeability, higher color saturation, good hand feeling and anti-sticking effect.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The following provides a detailed description of the transparent release filler for leather in accordance with the embodiments of the present invention.
A method for preparing a transparent anti-sticking filler for leather comprises the following steps:
s1, dispersing water and spherical silicon dioxide in stirring to obtain a first mixed solution, wherein the mass ratio of the water to the spherical silicon dioxide is 60-70: 20-24.
Specifically, the reaction kettle is started firstly, so that the reaction kettle rotates at a low speed of less than 150r/min, then water is added into the reaction kettle, then spherical silicon dioxide is slowly added into the reaction kettle after the water is added, the rotating speed of the reaction kettle is adjusted to 380-420 r/min after the spherical silicon dioxide is added, the water and the spherical silicon dioxide are dispersed for 30-60 min, so that the water and the spherical silicon dioxide are completely and uniformly dispersed to obtain a first mixed solution, the mass ratio of the water added into the reaction kettle to the spherical silicon dioxide is 60-70: 20-24, the spherical silicon dioxide is silicon dioxide with spherical particles, and preferably, the particle size of the removed particles is 3-6 mu m.
S2, adding a suspension stabilizer ASE60 into the first mixed solution, and continuously dispersing to obtain a second mixed solution, wherein the mass ratio of the spherical silicon dioxide to the suspension stabilizer ASE60 is 20-24: 2.
Adding a suspension stabilizer ASE60 into the first mixed solution in the reaction kettle, wherein the mass of the added suspension stabilizer ASE60 and the mass of the spherical silicon dioxide are 2:20 to 24. And continuing stirring and dispersing for 30-60 min to fully and uniformly mix the suspension stabilizer ASE60 with the first mixed solution to obtain a second mixed solution.
The suspension stabilizer ASE60, also known as the acrylic thickener ASE-60, is directly commercially available.
Preferably, in order to better disperse the suspension stabilizer, the suspension stabilizer ASE60 is added for multiple times, and is dispersed for 30-60 min after each addition. More preferably, in order to further make the suspension stabilizer more uniformly dispersed, the suspension stabilizer ASE6 is equally divided into a plurality of portions, each of which is added to the first mixed solution.
S3, adjusting the pH value of the second mixed solution to 7.5-8.5.
And adding a pH regulator into the second mixed solution in the reaction kettle, and regulating the pH value of the second mixed solution to 7.5-8.5 to obtain a third mixed solution. The process of adjusting the pH is to add a pH regulator into the second mixed solution under the condition of continuous stirring of the reaction kettle, wherein the pH regulator comprises at least one of inorganic base and organic amine. In order to ensure that the pH value of the final mixed solution is accurate, after the pH regulator is added into the second mixed solution, the pH value is stabilized at 7.5-8.5 for at least 20min, or the pH value is stabilized at 7.5-8.5 after 30-60 min from the adjustment of the pH value, so that the accurate pH value can be obtained. In the embodiments of the present invention, the pH adjuster may be inorganic base such as sodium hydroxide, potassium hydroxide, ammonia water, or organic amine such as aliphatic amine, alcohol amine, and amide, and in the embodiments of the present application, sodium hydroxide solution which is easy to obtain and low in cost is used as the pH adjuster, and the mass concentration of the sodium hydroxide solution is 20%.
And S4, adjusting the pH value of the second mixed solution to 7.5-8.5 to obtain a third mixed solution, adding a preservative into the third mixed solution after the third mixed solution is obtained, and continuously dispersing for 50-70 min, wherein the mass ratio of the added preservative to the spherical silicon dioxide is 0.2: 20-24. The addition of the preservative is to improve the corrosion resistance of the leather transparent anti-sticking filler and prolong the service life of the leather transparent anti-sticking filler. The preservative is a commercially available preservative for common leather.
The inorganic silicon dioxide has the advantages of high temperature resistance and stable performance. The matting filler used in leather is generally amorphous silica, and its surface irregularities cause more scattered light and less reflected light, thereby achieving a matting effect. Then, in contrast, the spherical silica surface is smooth, reflects more light and has better luster. The transparent anti-sticking filler for leather prepared by the method has the advantages that in the process of coating film forming, the spherical silicon dioxide is suspended and dispersed on the surface of the film, so that the direct contact of two leather blank coatings can be prevented, the adhesion between the coatings can be effectively prevented, and the smooth surface of the coating enables the hand feeling of the coating to be dry and comfortable but not rough.
The invention provides a transparent anti-sticking filler for leather, which is prepared by adopting the preparation method provided by the invention.
When the leather transparent anti-sticking filler provided by the invention is used for an effect coating in the leather processing process, the leather stack can effectively play an anti-sticking effect, and the leather has good glossiness, good transparency, full color and dry and smooth surface.
The following describes a leather transparent anti-sticking filler provided by the present invention with reference to specific examples.
Example 1
The embodiment provides a leather transparent anti-sticking filler and a preparation method thereof.
A method for preparing a transparent anti-sticking filler for leather comprises the following steps:
60kg of water is put into a reaction kettle under the condition that the reaction kettle is stirred at a low speed of 120r/min, after the water is added, spherical silicon dioxide is slowly added into the reaction kettle, and the adding amount of the spherical silicon dioxide is 24 kg. And then adjusting the rotating speed of the reaction kettle to 380r/min, and dispersing for 30min to obtain a first mixed solution.
Adding 2kg of suspension stabilizer ASE60 into the first mixed solution in the reaction kettle, adding 2kg of suspension stabilizer ASE60 twice, adding 1kg of suspension stabilizer ASE each time, stirring and dispersing for 60min after adding each time, and stirring to obtain a second mixed solution after completely adding the suspension stabilizer ASE 60.
And (3) adjusting the second mixed solution, taking a 20% sodium hydroxide solution as a pH regulator, and adding the sodium hydroxide solution for 20min to stabilize the pH at 7.5 to obtain a third mixed solution.
And then adding 0.2kg of preservative into the third mixed solution in the reaction kettle, and continuously dispersing for 50min to obtain the transparent anti-sticking leather filler.
Example 2
The embodiment provides a leather transparent anti-sticking filler and a preparation method thereof.
A method for preparing a transparent anti-sticking filler for leather comprises the following steps:
under the condition that the reaction kettle is stirred at a low speed of 140r/min, 70kg of water is put into the reaction kettle, after the water is added, the spherical silicon dioxide is slowly added into the reaction kettle, and the adding amount of the spherical silicon dioxide is 20 kg. And then adjusting the rotating speed of the reaction kettle to 420r/min, and dispersing for 60min to obtain a first mixed solution.
Adding 2kg of suspension stabilizer ASE60 into the first mixed solution in the reaction kettle, adding 60kg of the 2kg of suspension stabilizer ASE for 4 times, adding 0.5kg of the suspension stabilizer ASE each time, stirring and dispersing for 30min after adding each time, and stirring to obtain a second mixed solution after completely adding the suspension stabilizer ASE 60.
And (3) adjusting the second mixed solution, taking a 20% sodium hydroxide solution as a pH regulator, and adding sodium hydroxide for 20min to stabilize the pH at 8.5 to obtain a third mixed solution.
And then adding 0.2kg of preservative into the third mixed solution in the reaction kettle, and continuously dispersing for 70min to obtain the leather transparent anti-sticking filler provided by the invention.
Example 3
The embodiment provides a leather transparent anti-sticking filler and a preparation method thereof.
A method for preparing a transparent anti-sticking filler for leather comprises the following steps:
putting 65kg of water into a reaction kettle at a low-speed stirring speed of 80r/min, adding the water, and slowly adding 22kg of spherical silicon dioxide into the reaction kettle. And then adjusting the rotating speed of the reaction kettle to 400r/min, and dispersing for 40min to obtain a first mixed solution.
Adding 2kg of suspension stabilizer ASE60 into the first mixed solution in the reaction kettle, adding 60kg of the 2kg of suspension stabilizer ASE 5 times, adding 0.4kg of the suspension stabilizer ASE each time, stirring and dispersing for 40min after adding each time, and stirring to obtain a second mixed solution after completely adding the suspension stabilizer ASE 60.
And (3) adjusting the second mixed solution, taking a 20% sodium hydroxide solution as a pH regulator, and adding sodium hydroxide for 20min to stabilize the pH at 8 to obtain a third mixed solution.
And then adding 0.2kg of preservative into the third mixed solution in the reaction kettle, and continuously dispersing for 60min to obtain the transparent anti-sticking leather filler.
Example 4
The embodiment provides a leather transparent anti-sticking filler and a preparation method thereof.
A method for preparing a transparent anti-sticking filler for leather comprises the following steps:
putting 62kg of water into a reaction kettle at a low-speed stirring speed of 100r/min, adding the water, and slowly adding 21kg of spherical silicon dioxide into the reaction kettle. And then adjusting the rotating speed of the reaction kettle to 400r/min, and dispersing for 50min to obtain a first mixed solution.
Adding 2kg of suspension stabilizer ASE60 into the first mixed solution in the reaction kettle, adding 60kg of suspension stabilizer ASE for 2 times, adding 1kg of suspension stabilizer ASE each time, stirring and dispersing for 50min after adding each time, and stirring to obtain a second mixed solution after completely adding the suspension stabilizer ASE 60.
And (3) adjusting the second mixed solution, taking a 20% sodium hydroxide solution as a pH regulator, and adding sodium hydroxide for 20min to stabilize the pH at 7.8 to obtain a third mixed solution.
And then adding 0.2kg of preservative into the third mixed solution in the reaction kettle, and continuously dispersing for 65min to obtain the leather transparent anti-sticking filler provided by the invention.
Example 5
The embodiment provides a leather transparent anti-sticking filler and a preparation method thereof.
A method for preparing a transparent anti-sticking filler for leather comprises the following steps:
68kg of water is put into a reaction kettle under the condition that the reaction kettle is stirred at a low speed of 100r/min, after the water is added, spherical silicon dioxide is slowly added into the reaction kettle, and the adding amount of the spherical silicon dioxide is 24 kg. And then adjusting the rotating speed of the reaction kettle to 400r/min, and dispersing for 55min to obtain a first mixed solution.
Adding 2kg of suspension stabilizer ASE60 into the first mixed solution in the reaction kettle, adding 60kg of suspension stabilizer ASE for 2 times, adding 1kg of suspension stabilizer ASE each time, stirring and dispersing for 45min after adding each time, and stirring to obtain a second mixed solution after completely adding the suspension stabilizer ASE 60.
And (3) adjusting the second mixed solution, taking a 20% sodium hydroxide solution as a pH regulator, and adding sodium hydroxide for 20min to stabilize the pH at 8.2 to obtain a third mixed solution.
And then adding 0.2kg of preservative into the third mixed solution in the reaction kettle, and continuously dispersing for 55min to obtain the leather transparent anti-sticking filler provided by the invention.
Examples of the experiments
The first group of control is D1 by taking the effect paint without adding any filler, the second group of control is D2 by taking 530 parts of the effect paint with 10 parts of common amorphous silica matting filler added in the market, and the second group of control is S1-S5 by adding 10 parts of the anti-sticking filler provided by each embodiment of the invention into 530 parts of the effect paint respectively (the specific components of the effect paint are shown in Table 1, and the used materials are all products sold by Sichuan Dawei science and technology Co., Ltd.). D1, D2 and S1-S5 are applied to leather to obtain a leather embryo. Gloss was measured using a gloss meter, the above-mentioned blanks were observed by 20 leather processors, their transparency and color saturation were scored, the D1 result was 8, the average composition of each component was recorded, the hand feel was evaluated, the blanks were folded in half, the hot and humid tackiness was measured using a hot tack apparatus, and the results were recorded in Table 2.
TABLE 1 ingredients of Effect coatings
TABLE 2 record of the performance tests of the examples and comparative examples
As can be seen from table 2, the leather transparent anti-sticking filler provided in each embodiment of the present invention, when applied to leather, provides a leather blank having high gloss, good transparency, high color saturation, good hand feeling, and no adhesion or even tearing phenomenon when measuring the thermal adhesiveness. Therefore, when the leather transparent anti-sticking filler provided by the invention is used for an effect coating in the leather processing process, the leather stack can effectively play an anti-sticking effect, and the leather has the advantages of good glossiness, good transparency, full color and dry and smooth surface without roughness.
In conclusion, the preparation method of the leather transparent anti-sticking filler provided by the invention is simple to operate, and the spherical silicon dioxide is selected and combined with the reasonable operation method provided by the invention, so that the prepared leather transparent anti-sticking filler is suspended and dispersed on the surface of the film in the coating film forming process, and can prevent two leather blank coatings from being directly contacted, thereby effectively preventing the adhesion between the coatings.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of a leather transparent anti-sticking filler is characterized by comprising the following steps:
dispersing water and spherical silicon dioxide in stirring to obtain a first mixed solution, wherein the mass ratio of the water to the spherical silicon dioxide is 60-70: 20-24;
adding a suspension stabilizer ASE60 into the first mixed solution, and continuously dispersing to obtain a second mixed solution, wherein the mass ratio of the spherical silicon dioxide to the suspension stabilizer ASE60 is 20-24: 2;
and adjusting the pH value of the second mixed solution to 7.5-8.5.
2. The method for preparing the leather transparent anti-sticking filler according to claim 1, wherein the particle shape of the silica is spherical and the particle diameter is 3 to 6 μm.
3. The method for preparing the leather transparent anti-sticking filler according to claim 1, wherein the pH regulator for regulating the pH value of the second mixed solution to 7.5-8.5 comprises at least one of inorganic base and organic amine.
4. The preparation method of the leather transparent anti-sticking filler according to claim 1, characterized in that a third mixed solution is obtained after the pH value of the second mixed solution is adjusted to 7.5-8.5, a preservative is added into the third mixed solution after the third mixed solution is obtained, and the preservative is dispersed for 50-70 min, wherein the mass ratio of the preservative to the spherical silicon dioxide is 0.2: 20-24.
5. The preparation method of the leather transparent anti-sticking filler according to claim 4, wherein the pH value of the second mixed solution is adjusted to 7.5-8.5 to obtain a third mixed solution, which specifically comprises: and adding a pH regulator into the second mixed solution in the reaction kettle, and reacting the hydrogen pH regulator with the second mixed solution while stirring until the pH value is stabilized at 7.5-8.5 for at least 20min to obtain a third mixed solution.
6. The method for preparing the leather transparent anti-sticking filler according to claim 1, characterized in that water and spherical silica are dispersed while stirring to obtain a first mixed solution, specifically:
firstly, water is placed in a reaction kettle, stirring is carried out at the rotating speed of less than 150r/min, then the spherical silicon dioxide is added into the water, the rotating speed is increased to 380-420 r/min after the spherical silicon dioxide is added, and the dispersion is carried out for 30-60 min.
7. The method for preparing the leather transparent anti-sticking filler according to claim 1, characterized in that the suspension stabilizer ASE60 is added into the first mixed solution to be continuously dispersed to obtain a second mixed solution, specifically:
and adding the suspension stabilizer ASE60 into the first mixed solution for multiple times for dispersion, wherein the dispersion time is 30-60 min after adding the suspension stabilizer ASE60 each time.
8. The method for preparing the leather transparent anti-sticking filler according to claim 7, characterized in that the suspension stabilizer ASE60 is added into the first mixed solution for dispersion in several portions, and the suspension stabilizer ASE6 is equally divided into several portions, one portion being added each time.
9. A transparent release filler for leather, characterized in that it is obtained by a process for the preparation of a transparent release filler for leather according to any one of claims 1 to 8.
10. Use of a leather transparent release filler according to claim 9 in effect coatings during leather processing.
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| CN201910167969.0A CN109825653B (en) | 2019-03-06 | 2019-03-06 | Transparent anti-sticking leather filler and preparation method and application thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103154152A (en) * | 2010-10-06 | 2013-06-12 | 3M创新有限公司 | Coating composition and method of making and using the same |
| CN206646752U (en) * | 2017-03-02 | 2017-11-17 | 福建亿硕科技有限公司 | A kind of anti-paste coating with rough surface |
| CN107973537A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of high-temperature flexible cement mortar suspending agent and preparation method thereof and cement mortar |
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- 2019-03-06 CN CN201910167969.0A patent/CN109825653B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103154152A (en) * | 2010-10-06 | 2013-06-12 | 3M创新有限公司 | Coating composition and method of making and using the same |
| CN107973537A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of high-temperature flexible cement mortar suspending agent and preparation method thereof and cement mortar |
| CN206646752U (en) * | 2017-03-02 | 2017-11-17 | 福建亿硕科技有限公司 | A kind of anti-paste coating with rough surface |
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