Hot roll coated wax with a crazy horse effect and method for making same

Abstract

The present application belongs to the field of tanning technology, and particularly relates to hot roller wax with a strong horse effect and a preparation method thereof. The hot roller wax with a strong horse effect is prepared from the following raw materials in parts by weight: 80-90 parts of paraffin wax, 7-15 parts of synthetic oil A, 1-3 parts of poly-alpha-olefin wax, and 0.1-2 parts of a mildew inhibitor. The hot roller wax with a strong horse effect is prepared by roller coating, and a leather embryo with a strong horse effect and a complete wax feeling is obtained. The leather embryo has a dry and non-greasy hand feeling on the surface, and does not become greasy after long storage. In addition, the hot roller wax with a strong horse effect has a simple preparation process, low cost, and is suitable for industrial production.

Description

Technical Field

[0001] This invention belongs to the field of leather processing technology, specifically relating to a hot roller wax coating with a crazy horse effect and its preparation method. Background Technology

[0002] With the continuous improvement of people's living standards, leather products have entered thousands of households. The use of leather in clothing, shoemaking, and leather goods has increased significantly, and people's requirements for the appearance of leather products are becoming more and more diversified, resulting in the emergence of polished leather, patent leather, and polished effect leather. Among them, Crazy Horse effect leather, with its strong wax-like effect, exhibits a rugged and rustic style, and is highly sought after among mid- to high-end leathers. The Crazy Horse effect is a special stretch-and-change effect; pushing the surface of the leather will reveal a color change effect of the base color. After coating, Crazy Horse effect leather has a smooth, waxy feel, and the surface texture appears slightly messy and disordered. After rubbing, the finished leather has a fuzzy surface and a strong genuine leather feel.

[0003] Crazy Horse is a classic vintage casual leather collection, available in two main categories: glossy and matte. Crazy Horse products feature distinctive scratches, but they become increasingly lustrous with use. They are widely used in the leather bag, belt, and footwear markets, especially in Europe and America where they enjoy high acceptance. Currently, carnauba wax emulsion and resin are commonly used to create the Crazy Horse effect on leather.

[0004] Crazy Horse leather currently on the market has multiple layers, including a base coating, a paint layer, and a surface layer. Functionally, it has anti-stick, waterproof, elastic, and wear-resistant finishes, and the process is complex.

[0005] In existing publicly available patents related to Crazy Horse leather, polyurethane resin or acrylic resin is often used as the adhesive layer. While the resin has the properties of forming a film, the addition of resin brings resistance to bending and stretching, but it also affects the color-changing effect of Crazy Horse leather, making it difficult to achieve an excellent antique deep color-changing effect and resulting in poor wiping restoration effect.

[0006] Crazy Horse leather in the synthetic leather industry is based on artificial leather base fabric, which is isotropic and has undergone dense treatment. Color-changing wax cannot penetrate into the base material well, unlike the color-changing effect created by isotropic penetration in leather fibers. Moreover, Crazy Horse synthetic leather relies on wet base and dry lamination production. Although there are many processes, the three-dimensional effect of the finished product is not as good as that of genuine leather. Summary of the Invention

[0007] Based on the above technical background, the present invention provides a hot roller coating wax with a crazy horse effect and its preparation method. The hot roller coating wax with a crazy horse effect is made from paraffin wax, synthetic grease A, polyalphaolefin wax and antifungal agent. The hot roller coating wax with a crazy horse effect can be prepared by hot roller coating to obtain a leather blank with a strong crazy horse effect. The obtained leather blank has a strong color change effect, a full waxy feel and is durable.

[0008] The first aspect of this invention is to provide a hot roller coating with a "crazy horse" effect, said hot roller coating being prepared from the following raw materials in parts by weight:

[0009]

[0010] Preferably, the hot roller wax with the crazy horse effect is made from the following raw materials in parts by weight:

[0011]

[0012] Preferably, the paraffin wax is 58# semi-refined paraffin wax;

[0013] The antifungal agent is selected from one or more of BIOBANI-20 antifungal agent, biphenylphenol, and 2-pyridinethiol-1-zinc oxide.

[0014] Preferably, the synthetic oil A is prepared from the following raw materials in parts by weight:

[0015] Animal fats 80-90 parts;

[0016] 10-15 parts of triethanolamine;

[0017] Sodium methoxide 0.2 to 1 part.

[0018] More preferably, the synthetic oil A is prepared from the following raw materials in parts by weight:

[0019] Animal fats and fats: 83–86.5 parts;

[0020] 12-13 parts of triethanolamine;

[0021] Sodium methoxide 0.4-0.5 parts.

[0022] A second aspect of the present invention is to provide a method for preparing a hot roller coating with the crazy horse effect described in the first aspect of the present invention, the method comprising the following steps:

[0023] Paraffin wax, synthetic grease A, polyalphaolefin wax and antifungal agent are mixed, heated and melted, stirred evenly and then cooled to obtain hot roller coating wax with Crazy Horse effect.

[0024] Preferably, paraffin wax, synthetic grease A, polyalphaolefin wax and antifungal agent are mixed and heated to 65-80°C and stirred for 20-60 minutes.

[0025] Preferably, the synthetic oil A is prepared by the following steps:

[0026] Animal fats, triethanolamine, and sodium methoxide are mixed and heated to react. After the reaction, the mixture is cooled to obtain the synthetic fat A.

[0027] More preferably, animal fats, triethanolamine and sodium methoxide are mixed and heated to 125-140°C and kept at that temperature for 3-5 hours; after the reaction, the temperature is lowered to below 40°C to obtain synthetic fat A.

[0028] The beneficial effects of this invention are as follows:

[0029] (1) The synthetic grease A used in this invention not only has a strong effect of deepening and brightening, which can enhance the crazy horse effect of the leather, but also has the function of adjusting the hardness of the leather and enhancing the comfortable feel of the leather, and will not affect the clarity of the crazy horse pattern of the leather; at the same time, the introduction of polyalphaolefin wax can lock the synthetic grease A in the leather, improve the feel, enhance uniformity and separation, and improve the durability of the crazy horse leather; in addition, the 58# semi-refined paraffin wax added in this invention can provide stress-induced color change effect, further enhance the color change effect, and also improve the uniformity and flexibility of the coating.

[0030] (2) The hot roller waxing method described in this invention, which produces a Crazy Horse leather with a strong Crazy Horse effect, can be used to prepare leather blanks with a strong Crazy Horse effect and a sufficient wax feel. Cross-linking and curing can be achieved without adding resin film-forming agents or other additives during the hot roller waxing process. This hot roller waxing method eliminates the need for multiple layers; a single coating is sufficient to form durable Crazy Horse leather. Compared to the existing technology that typically uses wax emulsion / resin adjustments to prepare Crazy Horse leather, this method is simpler and produces a superior Crazy Horse effect.

[0031] (3) The raw materials used in this invention are inexpensive, the process is simple, and it is easy to operate, enabling large-scale industrial production. Attached Figure Description

[0032] Figure 1 Images are shown of the original hide, the hide prepared using Example 1 with a strong Crazy Horse effect after hot roller waxing, and the hide obtained by kneading after hot roller waxing. Detailed Implementation

[0033] The present invention will now be described in detail, and its features and advantages will become clearer and more apparent from these descriptions.

[0034] The first aspect of this invention is to provide a hot roller coating with a "crazy horse" effect, said hot roller coating being prepared from the following raw materials in parts by weight:

[0035]

[0036] Preferably, the hot roller wax with the crazy horse effect is made from the following raw materials in parts by weight:

[0037]

[0038] Paraffin wax (also known as crystalline wax) refers to a mixture of hydrocarbons with approximately 18 to 30 carbon atoms. Its main components are straight-chain alkanes (approximately 80% to 95%), with a small amount of alkanes with individual branches and monocyclic cycloalkanes with long side chains (the combined content of the two is less than 20%).

[0039] The paraffin wax is preferably 58# semi-refined paraffin wax.

[0040] 58# semi-refined paraffin wax has a stable chemical structure and is a low-melting-point phase change material. Its solid-liquid phase change process has a small volume change, which is beneficial to improving the uniformity of the coating. Its melting point is 58-60℃, which is suitable for contact with leather without causing a thermal reaction. At the same time, 58# semi-refined paraffin wax has good adhesion, moderate hardness and flexibility, and good plasticity. It will not cause the leather to harden, and it can also provide stress-induced color change effect. As a raw material for crazy horse wax, it also has the advantage of being easy to handle and can provide a strong color change effect.

[0041] Polyalphaolefin wax has a strong oil-locking effect. Adding this additive enhances the separation properties during high-temperature, high-pressure pressing, effectively locking the oil inside the leather base. This prevents oil from floating on the surface and causing unevenness such as oil spots, while ensuring a dry, non-greasy feel. Furthermore, hot roller waxing with this additive prevents the leather base from developing an oily sheen even after prolonged storage, resulting in durable Crazy Horse leather.

[0042] The antifungal agent is selected from one or more of BIOBANI-20 antifungal agent, biphenylphenol and 2-pyridinethiol-1-zinc oxide, preferably BIOBANI-20 antifungal agent.

[0043] According to a preferred embodiment of the present invention, the synthetic oil A is prepared from the following raw materials in parts by weight:

[0044] Animal fats 80-90 parts;

[0045] 10-15 parts of triethanolamine;

[0046] Sodium methoxide 0.2 to 1 part.

[0047] Preferably, the synthetic oil A is prepared from the following raw materials in parts by weight:

[0048] Animal fats and fats: 83–86.5 parts;

[0049] 12-13 parts of triethanolamine;

[0050] Sodium methoxide 0.4-0.5 parts.

[0051] The synthetic grease A described in this invention has a strong color-changing effect. When roller-coated onto the leather, it penetrates evenly without uneven penetration that could lead to oil spots. When added to a hot roller-coating wax formula, it can significantly enhance the Crazy Horse effect, adjust the feel of the leather, and ensure that the leather remains soft and comfortable even after being roller-coated with solid wax, while also improving uniformity.

[0052] The main innovation of this invention lies in the use of paraffin wax, synthetic oils, and polyalphaolefin waxes to create a hot-rolled wax product. This product is directly hot-rolled under molten conditions to obtain a waxy coating with a Crazy Horse effect. The Crazy Horse leather obtained from this formula exhibits a strong Crazy Horse effect, good release properties, a comfortable feel, and a rich waxy texture. Compared to Crazy Horse leather obtained using conventional formulas, it has a stronger texture and color-changing effect, and also possesses the characteristic of wiping and restoring its original appearance, making the finished leather more durable.

[0053] A second aspect of the present invention is to provide a method for preparing a hot roller coating with the crazy horse effect described in the first aspect of the present invention, the method comprising the following steps:

[0054] Paraffin wax, synthetic grease A, polyalphaolefin wax and antifungal agent are mixed, heated and melted, stirred evenly and then cooled to obtain hot roller coating wax with Crazy Horse effect.

[0055] Preferably, 58# semi-refined paraffin wax, synthetic grease A, polyalphaolefin wax and antifungal agent are mixed and then heated to 65-80°C and stirred for 20-60 minutes, more preferably heated to 70-75°C and stirred for 30-45 minutes.

[0056] After heating and stirring, the mixture becomes a uniform, transparent, slightly yellow liquid. The molten mixture is poured into a mold and cooled to obtain a milky white to slightly yellow wax block, which is the hot roller wax with the Crazy Horse effect.

[0057] According to a preferred embodiment of the present invention, the synthetic oil A is prepared by the following steps:

[0058] Animal fats, triethanolamine, and sodium methoxide are mixed and heated to react. After the reaction, the mixture is cooled to obtain the synthetic fat A.

[0059] Preferably, animal fats, triethanolamine, and sodium methoxide are mixed and then heated to 125–140°C and kept at that temperature for 3–5 hours.

[0060] More preferably, animal fats, triethanolamine and sodium methoxide are mixed and heated to 130-135°C and kept at that temperature for 4 hours.

[0061] After the reaction, the temperature is lowered to below 40°C to obtain synthetic fat A.

[0062] Example

[0063] The present invention is further illustrated by specific examples below. These embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0064] The 58# semi-refined paraffin wax used in this embodiment of the invention was purchased from Shanghai Jinchan Import & Export Trading Co., Ltd., and the polyalphaolefin wax was purchased from Chuangen International Trade (Shanghai) Co., Ltd.

[0065] Example 1

[0066] 85 parts of animal fat, 13 parts of triethanolamine and 0.5 parts of sodium methoxide were mixed and heated to 130°C and kept at that temperature for 4 hours. Then the temperature was lowered to below 40°C to obtain synthetic fat A.

[0067] 85 parts of 58# semi-refined paraffin wax, 10 parts of synthetic grease A, 2 parts of polyalphaolefin wax and 1 part of BIOBANI-20 antifungal agent were heated to 70°C and stirred for 45 minutes. The molten mixture was poured into a mold and cooled to obtain hot roller coating wax with the Crazy Horse effect.

[0068] The prepared hot roller coating wax with the "Crazy Horse" effect is melted and evenly poured into a hot roller coating machine. The coating temperature is set to 80℃. The cut and trimmed cowhide is passed through the roller to ensure the hot roller coating wax is evenly applied to the surface of the hide. The coating amount is 10g / sf. The coated hide is then baked at 80℃ for 1-2 minutes, and then left to stand overnight. The surface of the hot roller-coated hide is as follows: Figure 1 As shown, after kneading the dough, the texture becomes clear and natural, as... Figure 1 As shown.

[0069] The pressing machine was set to 90℃, and the hot-rolled leather blanks were embossed under two conditions: a pressure of 50 kg for 2 seconds and a pressure of 160 kg for 1 second. Both embossing conditions resulted in leather blanks with strong color change, a delicate feel, and a rich waxy texture. They also exhibited good uniformity, without curling, and displayed a strong "crazy horse" effect. After kneading the leather blanks, the texture became clear and natural.

[0070] Example 2

[0071] 83 parts animal fat, 13 parts triethanolamine and 0.5 parts sodium methoxide were mixed and heated to 135°C and kept at that temperature for 4 hours. Then the temperature was lowered to below 40°C to obtain synthetic fat A.

[0072] 86 parts of 58# semi-refined paraffin wax, 10 parts of synthetic grease A, 1.5 parts of polyalphaolefin wax and 1 part of BIOBANI-20 antifungal agent were heated to 75°C and stirred for 30 minutes. The molten mixture was poured into a mold and cooled to obtain hot roller coating wax with the Crazy Horse effect.

[0073] Example 3

[0074] 86.5 parts of animal fat, 12 parts of triethanolamine and 0.4 parts of sodium methoxide were mixed and heated to 130°C and kept at that temperature for 4 hours. Then the temperature was lowered to below 40°C to obtain synthetic fat A.

[0075] 84 parts of 58# semi-refined paraffin wax, 11 parts of synthetic grease A, 2 parts of polyalphaolefin wax and 1 part of BIOBANI-20 antifungal agent were heated to 70°C and stirred for 45 minutes. The molten mixture was poured into a mold and cooled to obtain hot roller coating wax with the Crazy Horse effect.

[0076] Comparative Example

[0077] Comparative Example 1

[0078] The hot roller coating with the crazy horse effect was prepared in a manner similar to that in Example 1, except that synthetic grease A was not added.

[0079] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A hot roller wax coating with a "crazy horse" effect, characterized in that, The hot roller wax with the crazy horse effect is made from the following raw materials in parts by weight: 80-90 parts paraffin; Synthetic oil A: 7-15 parts; 1-3 parts of polyalphaolefin wax; 0.1 to 2 parts of antifungal agent; The synthetic oil A is prepared from the following raw materials in parts by weight: Animal fats 80-90 parts; 10-15 parts of triethanolamine; Sodium methoxide 0.2 to 1 part.

2. The hot roller wax coating with the "crazy horse" effect according to claim 1, characterized in that, The hot roller wax with the crazy horse effect is made from the following raw materials in parts by weight: Paraffin wax 84-86 parts; Synthetic oil A 10-11 parts; 1.5 to 2 parts of polyalphaolefin wax; 0.5 to 1 part of antifungal agent.

3. The hot roller wax coating with the "crazy horse" effect according to claim 1, characterized in that, The paraffin wax is 58# semi-refined paraffin wax; The antifungal agent is selected from one or more of BIOBAN I-20 antifungal agent, biphenylphenol, and 2-pyridinethiol-1-zinc oxide.

4. The hot roller wax coating with the crazy horse effect according to claim 1, characterized in that, The synthetic oil A is prepared from the following raw materials in parts by weight: Animal fats and fats: 83–86.5 parts; 12-13 parts of triethanolamine; Sodium methoxide 0.4-0.5 parts.

5. A method for preparing a hot roller-coated wax with the crazy horse effect as described in any one of claims 1 to 4, characterized in that, The method includes the following steps: Paraffin wax, synthetic grease A, polyalphaolefin wax and antifungal agent are mixed, heated and melted, stirred evenly and then cooled to obtain hot roller coating wax with Crazy Horse effect.

6. The method according to claim 5, characterized in that, Mix paraffin wax, synthetic grease A, polyalphaolefin wax and antifungal agent, then heat to 65-80℃ and stir for 20-60 minutes.

7. The method according to claim 5, characterized in that, The synthetic oil A is prepared through the following steps: Animal fats, triethanolamine, and sodium methoxide are mixed and heated to 125–140°C and held at that temperature for 3–5 hours. After the reaction, the temperature is lowered to below 40°C to obtain the synthetic fat A.

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