Preparation method of protective wax and application thereof

Abstract

The application provides a preparation method of protective wax and application thereof, and belongs to the technical field of protective wax and comprises the following steps: mixing Brazil palm wax, rice bran wax, beeswax, soybean wax, hydrogenated palm oil and polyolefin wax, heating, melting and granulating. The technical scheme provided by the application improves the freezing point of the protective wax, widens the applicable temperature, has strong ozone resistance, and does not have the blooming phenomenon in appearance.

Description

Technical Field

[0001] This invention relates to the field of protective wax technology, specifically to a method for preparing a protective wax and its application. Background Technology

[0002] Most protective waxes on the market are currently formulated based on paraffin wax, microcrystalline wax, Fischer-Tropsch wax, etc., with a few containing some biomass wax. For example, Chinese patent CN112552694A, entitled "A Novel Protective Wax and Its Application in the Diolefin Rubber Field," discloses its components and their weight percentages as follows: 10%-50% fully refined paraffin wax, 1%-40% mixed crystal wax, 10%-50% microcrystalline wax, 1%-10% coal-based wax, 1%-10% wax, 1%-30% fatty alcohol polyoxyethylene ether, and 1%-30% fatty alcohol polyoxypropylene ether. The protective wax described above has the advantage of a glossy appearance. When applied to the diene rubber field, it forms a transparent and glossy ozone protective film on the rubber surface, effectively improving the appearance quality of rubber products, reducing the whitening phenomenon on the surface of rubber products, and improving the free-flowing characteristics of the protective wax, preventing caking during high-temperature storage or transportation. The above technical solutions contain a small proportion of wax and rely on petrochemical-based waxes.

[0003] Chinese patent CN101519532A, entitled "A Special Synthetic Wax for Rubber Protection and Its Preparation Process," discloses that this synthetic wax is made from waste soybean oil residue as raw material, refined bio-soybean wax as base material, and mixed with related auxiliary materials in a weight ratio of 100%. The key feature is that the composition and weight ratio of the synthetic wax are: bio-soybean wax: ≥50%; pure paraffin wax: ≤25%; microcrystalline wax ≤20%; polyethylene wax (EVA) ≤5%. The process for this synthetic wax is simple and easy to implement. This process can produce high-temperature liquid synthetic wax into low-temperature liquid soft rectangular block products, or into solid granular products. The working temperature for low-temperature metering packaging in the above technical solution for special synthetic wax products for rubber protection is 35~60℃. Since the working temperature for low-temperature metering packaging must be higher than the freezing point to ensure smooth operation, it can be seen that although the above technical solution mainly uses wax, the protective wax has a low freezing point. Summary of the Invention

[0004] In view of this, the present invention provides a method for preparing a protective wax and its application, thereby improving the freezing point of the protective wax.

[0005] To achieve the above objectives, the present invention provides a method for preparing protective wax, comprising the following steps: mixing carnauba wax, rice bran wax, beeswax, soybean wax, hydrogenated palm oil and polyolefin wax, heating and melting to granulate.

[0006] Optionally, the heating and melting process involves raising the temperature to 105-130°C, stopping the heating, and using the residual heat to melt the mixture.

[0007] Optionally, the granulation temperature is 60~90℃.

[0008] Optionally, after the mixture is melted, samples are taken to test the carbon number distribution. Granulation is performed if the isoalkanes content is between 33% and 43%. Otherwise, the proportion of raw materials is adjusted.

[0009] Optionally, the polyolefin wax is Clariwax, manufactured by Clariter.

[0010] To achieve the above objectives, the present invention also provides a method for preparing a protective wax, which is made from the following raw materials in parts by weight: 10-20 parts of carnauba wax, 16-25 parts of rice bran wax, 8-10 parts of beeswax, 20-40 parts of soybean wax, 12-18 parts of hydrogenated palm oil, and 3-5 parts of polyolefin wax.

[0011] Optional ingredients include the following parts by weight: 12 parts carnauba wax, 20 parts rice bran wax, 10 parts beeswax, 37 parts soybean wax, 16 parts hydrogenated palm oil, and 5 parts polyolefin wax.

[0012] To achieve the above objectives, the present invention also provides a protective wax for use in rubber protection.

[0013] The above-described technical solution of the present invention has at least the following beneficial effects: 1. The preparation method of this invention is simple, uses 100% sustainable raw materials, does not rely on petrochemical raw materials, complies with the requirements of the dual carbon policy, and meets the EU's export restrictions on domestic products.

[0014] 2. The present invention uses specific raw materials to obtain a protective wax product with excellent ozone resistance and is more friendly to rubber products in terms of appearance. It will not precipitate excessively on the surface of rubber products and contaminate their appearance, thus meeting the market demand of customers and enhancing the competitiveness of normal products.

[0015] 3. The product obtained by the present invention expands the application temperature range. Compared with the traditional protective wax in the prior art with a protective temperature range of 0-40℃, the protective temperature of the product of the present invention covers -20℃ to 55℃, which is suitable for a variety of application fields. It ensures that rubber products can play a stable role under different working conditions and in a wider temperature range, and better meet the actual application needs. Attached Figure Description

[0016] Figure 1 This is a diagram illustrating the actual effect of static aging at 55°C and 50pphm ozone for 48 hours in the embodiments and comparative examples of the present invention. Figure 2This is a diagram showing the actual effect of static -20℃, 50pphm ozone aging for 48 hours in the embodiments and comparative examples of the present invention. Figure 3 The image shows the actual effect of a 23-day blooming experiment at 40°C and 50pphm, as described in the embodiments and comparative examples of this invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of the present invention. Figures 1-3 The technical solutions of the embodiments of the present invention will be clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0018] The carnauba wax (Wuhan Jiyesheng Chemical Co., Ltd.), rice bran wax (Chongqing Hecai Chemical Technology Co., Ltd.), beeswax (Wuhan Jiyesheng Chemical Co., Ltd.), soybean wax (Wuhan Jiyesheng Chemical Co., Ltd.), hydrogenated palm oil (Wuhan Jiyesheng Chemical Co., Ltd.), and polyolefin wax (Clariwax model produced by Clariter) of the present invention are existing commercially available products.

[0019] Example 1 The preparation method of the protective wax in this embodiment includes the following steps: 1) Weigh out the following raw materials: 240g of Brazilian palm (12 parts), 400g of rice bran wax (20 parts), 200g of beeswax (10 parts), 740g of soybean wax (37 parts), 320g of hydrogenated palm oil (16 parts), and 100g of polyolefin wax (5 parts).

[0020] 2) Add the appropriate amount of raw material wax to the material tank and heat it to melt the raw material wax. When the material temperature rises to 120℃, close the steam valve. After the raw material wax has completely melted, take a sample to test the carbon number distribution of the product. If the content of isoparaffins is 33~43%, transfer it to the granulation kettle. Otherwise, adjust the raw material ratio. After transferring it to the granulation kettle, open the circulating water valve of the reactor to cool it down to 75℃ and granulate it.

[0021] Example 2 The preparation method of the protective wax in this embodiment includes the following steps: 1) Weigh out the following raw materials: 225g Brazilian palm (11.25 parts), 380g rice bran wax (19 parts), 185g beeswax (9.25 parts), 755g soybean wax (37.75 parts), 360g hydrogenated palm oil (18 parts), and 95g polyolefin wax (4.75 parts).

[0022] 2) Add the appropriate amount of raw material wax to the material tank and heat it to melt the raw material wax. When the material temperature rises to 105℃, close the steam valve. After the raw material wax has completely melted, take a sample to test the carbon number distribution of the product. If the content of isoparaffins is 33~43%, transfer it to the granulation kettle. Otherwise, adjust the raw material ratio. After transferring it to the granulation kettle, open the circulating water valve of the reactor to cool it down to 60℃ and granulate it.

[0023] Example 3 The preparation method of the protective wax in this embodiment includes the following steps: 1) Weigh out the following raw materials: 230g Brazilian palm (11.5 parts), 385g rice bran wax (19.25 parts), 200g beeswax (10 parts), 750g soybean wax (37.5 parts), 335g hydrogenated palm oil (16.75 parts), and 100g polyolefin wax (5 parts).

[0024] 2) Add the appropriate amount of raw material wax to the material tank and heat it to melt the raw material wax. When the material temperature rises to 125℃, close the steam valve. After the raw material wax has completely melted, take a sample to test the carbon number distribution of the product. If the content of isoparaffins is 33~43%, transfer it to the granulation kettle. Otherwise, adjust the raw material ratio. After transferring it to the granulation kettle, open the circulating water valve of the reactor to cool it down to 90℃ and granulate it.

[0025] Comparative Example 1 1. Weigh out the following ingredients: 230g Brazilian palm oil, 385g rice bran wax, 200g beeswax, 750g soybean wax, 335g hydrogenated palm oil, and 100g paraffin wax.

[0026] 2. Add the appropriate amount of raw material wax to the material tank and heat it to melt the raw material wax. When the material temperature rises to 125℃, close the steam valve. After the raw material wax has completely melted, take a sample to test the carbon number distribution of the product. If it is qualified, transfer it to the granulation kettle. After transferring it to the granulation kettle, open the circulating water valve of the reactor to cool it down to 90℃ and granulate it.

[0027] Comparative Example 2 1. Weigh out the following ingredients: 230g Brazilian palm oil, 200g beeswax, 750g soybean wax, 335g hydrogenated palm oil, and 485g microcrystalline wax.

[0028] 2. Add the appropriate amount of raw material wax to the material tank and heat it to melt the raw material wax. When the material temperature rises to 125℃, close the steam valve. After the raw material wax has completely melted, take a sample to test the carbon number distribution of the product. If it is qualified, transfer it to the granulation kettle. After transferring it to the granulation kettle, open the circulating water valve of the reactor to cool it down to 90℃ and granulate it.

[0029] Comparative Example 3 1. Weigh out the following raw materials: 230g paraffin wax, 200g beeswax, 750g soybean wax, 335g hydrogenated palm oil, and 485g polyolefin wax.

[0030] 2. Add the appropriate amount of raw material wax to the material tank and heat it to melt the raw material wax. When the material temperature rises to 125℃, close the steam valve. After the raw material wax has completely melted, take a sample to test the carbon number distribution of the product. If it is qualified, transfer it to the granulation kettle. After transferring it to the granulation kettle, open the circulating water valve of the reactor to cool it down to 90℃ and granulate it.

[0031] Comparative Example 4 The commercially available protective wax product from Yanggu Huatai Chemical Co., Ltd. is microcrystalline wax H3240.

[0032] The protective waxes prepared in Examples 1-3 and Comparative Examples 1-4 were evaluated according to their performance indicators, as shown in Table 1.

[0033]

[0034] The protective wax products prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to performance tests. The results of the vulcanization test are shown in Table 2, and the results of the ozone resistance test are shown in Table 3. Figure 1 and Figure 2 , Figure 1 The images show the actual effects of static aging at 55°C and 50pphm ozone for 48 hours in the examples and comparative cases. Figure 2 The images show the actual effects of static aging at -20℃ and 50pphm ozone for 48 hours for the examples and comparative examples; the appearance effects are shown in Table 4 and... Figure 3 , Figure 3 The actual effect of the 23-day blooming experiment at 40°C and 50pphm for the examples and comparative examples is shown in the figure.

[0035]

[0036] As shown in Table 2, the vulcanizer test results of the examples and the comparative examples are similar, that is, the products prepared by the present invention are comparable to the protective wax products in the prior art in terms of vulcanization performance.

[0037] The evaluation standard for ozone protection testing is based on GB / T11206-2009 "Rubber Aging Test - Surface Cracking Method".

[0038] Combined with Table 3 and Figure 1 and Figure 2 It can be seen that the product prepared in the embodiments of the present invention is significantly better than the product in the comparative example in terms of ozone aging resistance, and the product prepared in the embodiments of the present invention can achieve ozone protection effect at temperatures ranging from -20℃ to 55℃.

[0039] Blooming tests were conducted on the products of the examples and comparative examples at 40°C and 50 pphm. The results are shown in Table 4. Figure 3 .

[0040]

[0041] From Table 4 and Figure 3 It can be seen that the protective wax product provided by the present invention does not produce a spraying phenomenon compared with the comparative product; that is, the raw materials in the technical solution provided by the present invention are specific and work together to achieve a good appearance effect, which is superior to the appearance of the protective wax products in the prior art.

[0042] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing a protective wax, characterized in that, Includes the following steps: Brazil carnauba wax, rice bran wax, beeswax, soybean wax, hydrogenated palm oil, and polyolefin wax are mixed, heated, melted, and granulated.

2. The method for preparing the protective wax according to claim 1, characterized in that, The heating and melting process involves raising the temperature to 105-130°C, stopping the heating, and using the residual heat to melt the mixture.

3. The method for preparing the protective wax according to claim 1, characterized in that, The granulation temperature is 60~90℃.

4. The method for preparing the protective wax according to claim 1, characterized in that, After the mixture is melted, samples are taken to test the carbon number distribution. Granulation is carried out when the content of isoparaffins is between 33% and 43%.

5. The method for preparing the protective wax according to claim 1, characterized in that, The polyolefin wax is sodium lignosulfonate.

6. A protective wax prepared by the method described in any one of claims 1 to 5, characterized in that, It is made from the following raw materials in parts by weight: 10-20 parts carnauba wax, 16-25 parts rice bran wax, 8-10 parts beeswax, 20-40 parts soybean oil wax, 12-18 parts hydrogenated palm oil, and 3-5 parts polyolefin wax.

7. The protective wax according to claim 6, characterized in that, The raw materials include the following parts by weight: 12 parts carnauba wax, 20 parts rice bran wax, 10 parts beeswax, 37 parts soybean wax, 16 parts hydrogenated palm oil, and 5 parts polyolefin wax.

8. A protective wax as described in claim 6, applied to rubber protection.

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