Fragrance-modified silicone grease, its preparation method and application

Abstract

This invention belongs to the field of lubricating materials technology, and specifically relates to a fragrance-modified silicone grease, its preparation method, and its application. The fragrance-modified silicone grease comprises the following raw materials in parts by weight: 100-200 parts silicone oil, 5-20 parts tackifier, and 1-20 parts fragrance; the tackifier includes one or more combinations of hydroxypropyl methylcellulose, hydroxypropyl cellulose, and silica. The fragrance-modified silicone grease of this invention not only possesses excellent lubricating properties, effectively reducing friction and wear during mechanical movement, but also has a strong odor-masking ability, neutralizing and covering various unpleasant odors, thus improving the comfort of the user environment.

Description

Technical Field

[0001] This invention belongs to the field of lubricating materials technology, and specifically relates to a fragrance-modified silicone grease, its preparation method, and its application. Background Technology

[0002] With the improvement of modern living standards, refrigerators have become an essential appliance in every household. However, before use, refrigerators may develop unpleasant odors due to factors such as ambient temperature and storage time, which can negatively impact the user experience. Furthermore, the internal guide rails of the refrigerator may produce abnormal noises and discomfort due to prolonged friction and wear during use.

[0003] Therefore, how to solve the problem of refrigerator odor and the lubrication of the guide rails has become an urgent issue for modern home appliances. Summary of the Invention

[0004] The purpose of this invention is to provide a fragrance-modified silicone grease, its preparation method, and its application, in order to solve the problem of odor in refrigerators and the lubrication problem of guide rails.

[0005] The first aspect of the present invention provides a fragrance-modified silicone grease, the fragrance-modified silicone grease comprising the following raw materials in parts by weight: 100 to 200 parts silicone oil, 5 to 20 parts thickener, and 1 to 20 parts fragrance; the thickener comprising one or more combinations of hydroxypropyl methylcellulose, hydroxypropyl cellulose, and silicon dioxide.

[0006] In some embodiments of the present invention, the fragrance-modified silicone grease comprises the following raw materials in parts by weight: 100 to 200 parts silicone oil, 5 to 20 parts thickener, and 1 to 10 parts fragrance.

[0007] In some embodiments of the present invention, the silicone oil includes one or more combinations of methyltriethoxy silicone oil, methylphenyltriethoxy silicone oil, methyltriacetoxy silicone oil, and methyltripropionyloxy silicone oil.

[0008] In some embodiments of the present invention, the thickener includes at least one of hydroxypropyl methylcellulose and sodium carboxymethyl cellulose.

[0009] In some embodiments of the present invention, the fragrance is selected from natural extracts or synthetic fragrances.

[0010] In some embodiments of the present invention, the natural extract includes one or more combinations of rose extract, tea tree extract, peppermint extract, lavender extract, and citrus extract.

[0011] In some embodiments of the present invention, the synthetic fragrance includes one or more combinations of citrate, succinate, benzoate, and acetate.

[0012] The second aspect of the present invention provides a method for preparing the fragrance-modified silicone grease described in the first aspect, the method comprising: weighing each raw material according to the weight parts and mixing them evenly, and then heating and stirring to prepare the fragrance-modified silicone grease.

[0013] In some embodiments of the present invention, the preparation method includes: mixing silicone oil and a tackifier, heating and stirring until homogeneous to obtain a mixture; adding fragrance to the mixture, continuing to heat and stir, and cooling to obtain the fragrance-modified silicone grease.

[0014] In some embodiments of the present invention, the heating temperature is 40°C to 80°C.

[0015] The third aspect of this invention provides an application of the fragrance-modified silicone grease described in the first aspect or prepared by the preparation method described in the second aspect in the preparation of refrigerator guide rails.

[0016] This invention utilizes specific raw materials and their proportions to create fragrance-modified silicone grease that not only possesses excellent lubrication properties, effectively reducing friction and wear during mechanical movement, but also exhibits strong odor masking capabilities, neutralizing and covering various unpleasant smells to enhance the comfort of the user environment. Furthermore, the addition of surfactants and / or lubricants enhances the grease's permeability and adsorption, enabling better contact with various material surfaces and providing a long-lasting and stable lubrication effect.

[0017] The fragrance-modified silicone grease in this invention has excellent adhesion, dispersibility and stability.

[0018] The preparation method of the fragrance-modified silicone grease in this invention is simple, easy to operate, and suitable for large-scale production.

[0019] The fragrance-modified silicone grease of this invention requires only a small amount of fragrance, yet it can significantly improve the performance of the silicone grease and enhance the product's cost-effectiveness. Detailed Implementation

[0020] Exemplary embodiments of the present invention will now be described in more detail. It should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0021] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0022] The first aspect of the present invention provides a fragrance-modified silicone grease, which comprises the following raw materials in parts by weight: 100 to 200 parts of silicone oil, 5 to 20 parts of thickener, and 1 to 20 parts of fragrance; wherein the thickener comprises one or more combinations of hydroxypropyl methylcellulose, hydroxypropyl cellulose, and silica.

[0023] In an embodiment of the present invention, a fragrance-modified silicone grease that combines odor masking and lubrication is provided. Through careful design of the raw material ratio, the fragrance-modified silicone grease not only has excellent lubrication performance, effectively reducing friction and wear in mechanical movement, but also has a strong odor masking ability, which can neutralize and cover various unpleasant odors and improve the comfort of the use environment.

[0024] In some embodiments of the present invention, the amount of fragrance added to the fragrance-modified silicone grease is small, but it can significantly improve the performance of the silicone grease and improve the cost-effectiveness of the product. As some embodiments of the present invention, the fragrance-modified silicone grease includes the following raw materials in parts by weight: 100 to 200 parts of silicone oil, 5 to 20 parts of thickener, and 1 to 10 parts of fragrance.

[0025] silicone oil

[0026] Silicone oil is a polysiloxane formed by alternating arrangements of silicon and oxygen elements. It typically exists in a liquid or gel state and possesses excellent chemical stability and high-temperature resistance. Methyl silicone oil, as the most commonly used type of silicone oil, exhibits unique physicochemical properties, such as being colorless and transparent, non-toxic and odorless, with a high flash point, low freezing point, low viscosity-temperature coefficient, high compressibility, low surface tension, excellent electrical insulation properties, and heat resistance. In the embodiments of this invention, the silicone oil, as the core component of the silicone grease, can be selected from one or more combinations of methyltriethoxy silicone oil, methylphenyltriethoxy silicone oil, methyltriacetoxy silicone oil, and methyltripropionyloxy silicone oil.

[0027] In embodiments of the present invention, the weight fraction of the silicone oil is 100 to 200 parts. The weight fraction of the silicone oil provided by the present invention can be any value within the range formed by any two values ​​mentioned above, such as 100 to 150 parts, or 150 to 200 parts, and so on. Exemplarily, the weight fraction of the silicone oil in the present invention can be one of 100 parts, 110 parts, 120 parts, 130 parts, 140 parts, 150 parts, 160 parts, 170 parts, 180 parts, 190 parts, or 200 parts, or any value satisfying the above range.

[0028] Tackifier

[0029] Thickeners, also known as viscosity modifiers, are used to adjust the viscosity of fragrance-modified silicone grease.

[0030] In embodiments of the present invention, the thickener may be selected from one or more combinations of hydroxypropyl methylcellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, and silica.

[0031] In embodiments of the present invention, the weight percentage of the tackifier is 5 to 20 parts. The weight percentage of the tackifier provided by the present invention can be any value within the range of any two values ​​described above, such as 5 to 10 parts, or 10 to 20 parts, and so on. Exemplarily, the weight percentage of the tackifier in the present invention can be one of 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 parts, or any value satisfying the above range.

[0032] In some embodiments of the present invention, the tackifier includes at least one of hydroxypropyl methylcellulose and sodium carboxymethyl cellulose. Hydroxypropyl methylcellulose and sodium carboxymethyl cellulose not only act as tackifiers, but also increase surface activity, enhancing the permeability and adsorption of silicone grease, allowing for better contact with various material surfaces, and providing a long-lasting and stable lubrication effect.

[0033] essence

[0034] In embodiments of the present invention, the fragrance is selected from natural extracts or synthetic fragrances.

[0035] In some embodiments of the present invention, the natural extracts include one or more combinations of rose extract, tea tree extract, peppermint extract, lavender extract, and citrus extract.

[0036] Synthetic fragrances, also known as artificially synthesized fragrances, are diverse and include fatty acid ester fragrances, aromatic carboxylic acid ester fragrances, carboxylic acid ester fragrances containing alkene or alkyne unsaturated bonds, and other ester fragrances. In some embodiments of the present invention, the synthetic fragrance includes one or more combinations of citrate esters, citric acid esters, benzoate esters, and acetate esters.

[0037] In some embodiments of the present invention, fatty acid ester fragrances, such as acetate esters, are used, which can effectively mask odors while providing good lubrication.

[0038] In embodiments of the present invention, the weight parts of the fragrance are 1 to 20 parts. The weight parts of the fragrance provided by the present invention can be any value within the range of any two values ​​described above, such as 1 to 5 parts, 5 to 10 parts, 10 to 20 parts, and so on. Exemplarily, the weight parts of the fragrance of the present invention can be one of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 parts, or any value satisfying the above range.

[0039] In the embodiments of the present invention, through the design and careful proportioning of the above-mentioned specific raw materials, the fragrance-modified silicone grease not only has good lubrication performance, which can effectively reduce the friction and wear of the guide rail, but also has a strong odor masking ability, which can effectively mask the odor inside the refrigerator.

[0040] In the embodiments of the present invention, the fragrance-modified silicone grease has excellent adhesion, dispersibility and stability, and can be applied to the automotive industry, electronic equipment, home appliances and other fields.

[0041] The second aspect of the present invention provides a method for preparing fragrance-modified silicone grease. The key to this method is to weigh each raw material according to the weight proportions and mix them evenly, and then heat and stir to prepare the fragrance-modified silicone grease.

[0042] In embodiments of the present invention, the fragrance-modified silicone grease, through specific raw material ratios and manufacturing processes, not only has good lubrication properties, effectively reducing friction and wear of the guide rails, but also has a strong odor masking ability, effectively masking odors inside the refrigerator.

[0043] In some embodiments of the present invention, the preparation method of fragrance-modified silicone grease is specifically carried out according to the following steps.

[0044] (1) Mix silicone oil and tackifier, heat and stir evenly to obtain mixture A.

[0045] In embodiments of the present invention, the heating temperature is 40°C to 80°C. Exemplarily, the heating temperature can be one of 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, and 80°C, or any value satisfying the above range.

[0046] In embodiments of the present invention, the stirring speed for forming mixture A is 100 rpm to 500 rpm, and the stirring time is 1 h to 3 h. Exemplarily, the stirring speed can be one of 100 rpm, 200 rpm, 300 rpm, 400 rpm, or 500 rpm, or any value satisfying the above range. The stirring time can be one of 1 h, 2 h, or 3 h, or any value satisfying the above range.

[0047] (2) Add the flavoring to mixture A, continue heating and stirring to obtain mixture B.

[0048] In embodiments of the present invention, the heating temperature is maintained at 40°C to 80°C. Exemplarily, the heating temperature can be one of 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, and 80°C, or any value satisfying the above range.

[0049] In embodiments of the present invention, the stirring speed for forming mixture B is 100 rpm to 500 rpm, and the stirring time is 1 h to 3 h. Exemplarily, the stirring speed can be one of 100 rpm, 200 rpm, 300 rpm, 400 rpm, or 500 rpm, or any value satisfying the above range. The stirring time can be one of 1 h, 2 h, or 3 h, or any value satisfying the above range.

[0050] (3) Cool mixture B to room temperature to obtain fragrance-modified silicone grease.

[0051] In embodiments of the present invention, room temperature refers to a temperature between 20°C and 30°C, without active heating or cooling.

[0052] The third aspect of the present invention also provides the application of the fragrance-modified silicone grease described in the first aspect or the fragrance-modified silicone grease prepared by the preparation method described in the second aspect in the preparation of refrigerator guide rails.

[0053] In an embodiment of the present invention, the fragrance-modified silicone grease provided by the present invention can be used to prepare refrigerator guide rails, thereby solving both the odor problem and the lubrication problem of the guide rails.

[0054] In the embodiments of the present invention, the fragrance-modified silicone grease of the present invention can effectively adsorb and mask odor molecules, thereby achieving the effect of eliminating odors. The fragrance-modified silicone grease can be used in various occasions that require odor masking and lubrication. Moreover, the fragrance-modified silicone grease of the present invention has good lubrication properties, which can effectively reduce the friction and wear of the guide rail.

[0055] Unless otherwise defined, the technical terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art. Unless otherwise specified, the experimental reagents used in the following embodiments are all conventional biochemical reagents; the raw materials, instruments, and equipment used in the following embodiments can all be obtained commercially or through existing methods; unless otherwise specified, the amounts of experimental reagents used are the amounts used in conventional experimental operations; unless otherwise specified, the experimental methods are all conventional methods.

[0056] Example 1

[0057] A fragrance-modified silicone oil comprising the following raw materials in parts by weight: 150 parts methyltriethoxysilicone oil, 10 parts hydroxypropyl methylcellulose, and 1 part rose extract.

[0058] The preparation method of this fragrance-modified silicone grease is as follows:

[0059] Step 1: Mix methyltriethoxysilicone oil and hydroxypropyl methylcellulose, heat to 70°C, and stir until homogeneous to obtain mixture A.

[0060] Step 2: Add the rose extract to mixture A, continue heating to 70°C, and stir until homogeneous to obtain mixture B.

[0061] Step 3: Cool mixture B to room temperature to obtain fragrance-modified silicone grease.

[0062] Example 2

[0063] A fragrance-modified silicone oil comprising the following raw materials in parts by weight: 120 parts methylphenyltriethoxysilicone oil, 15 parts hydroxypropyl cellulose, and 2 parts tea tree extract.

[0064] The preparation method of this fragrance-modified silicone grease is as follows:

[0065] Step 1: Mix methylphenyltriethoxysilicone oil and hydroxypropyl cellulose, heat to 80°C, and stir until homogeneous to obtain mixture A;

[0066] Step 2: Add tea tree extract to mixture A, continue heating to 80°C, stir well to obtain mixture B.

[0067] Step 3: Cool mixture B to room temperature to obtain fragrance-modified silicone grease.

[0068] Example 3

[0069] A fragrance-modified silicone oil comprising the following raw materials in parts by weight: 180 parts methyltriacetoxy silicone oil, 8 parts sodium carboxymethyl cellulose, and 3 parts citrate.

[0070] The preparation method of this fragrance-modified silicone grease is as follows:

[0071] Step 1: Mix methyltriacetoxysilicone oil and sodium carboxymethyl cellulose, heat to 90°C, and stir until homogeneous to obtain mixture A.

[0072] Step 2: Add citrate to mixture A, continue heating to 90°C, stir until homogeneous, and obtain mixture B.

[0073] Step 3: Cool mixture B to room temperature to obtain fragrance-modified silicone grease.

[0074] Example 4

[0075] A fragrance-modified silicone oil comprising the following raw materials in parts by weight: 160 parts methyltripropionyloxysilicone oil, 12 parts silica, and 4 parts peppermint extract.

[0076] The preparation method of this fragrance-modified silicone grease is as follows:

[0077] Step 1: Mix methyltripropionoxysilicone oil and polyvinyl alcohol, heat to 60°C, and stir until homogeneous to obtain mixture A.

[0078] Step 2: Add peppermint extract to mixture A, continue heating to 60°C, stir well to obtain mixture B.

[0079] Step 3: Cool mixture B to room temperature to obtain fragrance-modified silicone grease.

[0080] Example 5

[0081] A fragrance-modified silicone oil comprising the following raw materials in parts by weight: 100 parts methyltriethoxysilicone oil, 5 parts hydroxypropyl methylcellulose, and 5 parts citric acid ester.

[0082] The preparation method of this fragrance-modified silicone grease is as follows:

[0083] Step 1: Mix methyltriethoxysilicone oil and hydroxypropyl methylcellulose, heat to 50°C, and stir until homogeneous to obtain mixture A.

[0084] Step 2: Add citric acid ester to mixture A, continue heating to 50°C, stir until homogeneous, and obtain mixture B.

[0085] Step 3: Cool mixture B to room temperature to obtain fragrance-modified silicone grease.

[0086] Example 6

[0087] A fragrance-modified silicone oil comprising the following raw materials in parts by weight: 200 parts methylphenyltriethoxysilicone oil, 20 parts hydroxypropyl cellulose, and 6 parts benzoate.

[0088] The preparation method of this fragrance-modified silicone grease is as follows:

[0089] Step 1: Mix methylphenyltriethoxysilicone oil and hydroxypropyl cellulose, heat to 100°C, and stir until homogeneous to obtain mixture A.

[0090] Step 2: Add benzoate to mixture A, continue heating to 100℃, stir until homogeneous, and obtain mixture B.

[0091] Step 3: Cool mixture B to room temperature to obtain fragrance-modified silicone grease.

[0092] Comparative Example 1

[0093] A fragrance-modified silicone oil comprises the following raw materials in parts by weight: 150 parts methyltriethoxysilicone oil, 10 parts hydroxypropyl methylcellulose, and 21 parts rose extract.

[0094] The preparation method of this fragrance-modified silicone grease is as follows:

[0095] Step 1: Mix methyltriethoxysilicone oil and hydroxypropyl methylcellulose, heat to 70°C, and stir until homogeneous to obtain mixture A.

[0096] Step 2: Add the rose extract to mixture A, continue heating to 70°C, and stir until homogeneous to obtain mixture B.

[0097] Step 3: Cool mixture B to room temperature to obtain fragrance-modified silicone grease.

[0098] Performance testing

[0099] 1. Uniformity test

[0100] Objective: To evaluate the uniformity of grease mixing and determine whether there is stratification or uneven mixing.

[0101] Test method:

[0102] Visual inspection method: Pour the prepared grease sample into a transparent glass container and let it stand for 24 hours. Observe whether the sample shows any layering, precipitation, or uneven coloring.

[0103] Record the degree of stratification (no stratification, slight stratification, obvious stratification).

[0104] Microscopic observation method: Take a small amount of grease sample and observe it under a microscope. Check whether there are any unevenly mixed particles or agglomerates in the sample.

[0105] 2. Odor persistence test

[0106] Objective: To evaluate the persistence of fragrance odor in grease.

[0107] Test method:

[0108] Initial odor assessment: The freshly prepared grease sample was assessed for odor by multiple testers.

[0109] Odor intensity was recorded using a rating scale (e.g., 1-5 points, where 1 point is odorless and 5 points is strong odor).

[0110] Odor persistence assessment: The grease samples were stored at room temperature (25°C) and the odor was assessed after 7, 15 and 30 days.

[0111] The odor intensity of the samples was scored by the same group of testers.

[0112] Record the changes in odor intensity over time.

[0113] 3. Mechanical performance testing

[0114] Objective: To evaluate the consistency and anti-wear properties of grease.

[0115] Test method:

[0116] Consistency test: The consistency of the grease is measured using a cone penetration meter (such as ASTM D217 standard).

[0117] Insert the cone of the cone penetration meter into the grease sample and record the depth of insertion (in 0.1 mm) within 5 seconds.

[0118] Repeat the test 3 times and take the average value.

[0119] Wear resistance test: The wear resistance of the grease is tested using a four-ball friction and wear tester (such as ASTM D4172 standard).

[0120] Run for 1 hour under a specific load (e.g., 40 kgf) and speed (e.g., 1200 rpm).

[0121] Measure the wear scar diameter of the steel ball after the test and record the results.

[0122] The smaller the wear scar diameter, the better the wear resistance.

[0123] Record the observations.

[0124] The performance of the fragrance-modified silicone greases provided in Examples 1-6 and Comparative Example 1 were tested according to the above test methods. The test results are shown in Table 1.

[0125] Table 1. Summary of the performance of fragrance-modified silicone greases in the examples and comparative examples.

[0126]

[0127] The fragrance-modified silicone grease prepared by the present invention through specific raw material ratios and manufacturing processes not only has good lubrication properties, effectively reducing friction and wear in mechanical movement, but also has a strong odor masking ability, which can neutralize and cover various unpleasant odors, improving the comfort of the use environment.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fragrance-modified silicone grease, characterized in that, The fragrance-modified silicone grease comprises the following raw materials in parts by weight: 100-200 parts silicone oil, 5-20 parts tackifier, 1-20 parts fragrance; The thickener includes one or more combinations of hydroxypropyl methylcellulose, hydroxypropyl cellulose, and silica.

2. The fragrance-modified silicone grease as described in claim 1, characterized in that, The fragrance-modified silicone grease comprises the following raw materials in parts by weight: 100-200 parts silicone oil, 5-20 parts tackifier, and 1-10 parts fragrance.

3. The fragrance-modified silicone grease as described in claim 1 or 2, characterized in that, The silicone oil includes one or more combinations of methyltriethoxy silicone oil, methylphenyltriethoxy silicone oil, methyltriacetoxy silicone oil, and methyltripropionyloxy silicone oil.

4. The fragrance-modified silicone grease as described in claim 1 or 2, characterized in that, The thickener includes at least one of hydroxypropyl methylcellulose and sodium carboxymethyl cellulose.

5. The fragrance-modified silicone grease as described in claim 1 or 2, characterized in that, The fragrances are selected from natural extracts or synthetic flavorings.

6. The fragrance-modified silicone grease as described in claim 5, characterized in that, The natural extracts include one or more combinations of rose extract, tea tree extract, peppermint extract, lavender extract, and citrus extract.

7. The fragrance-modified silicone grease as described in claim 5, characterized in that, The synthetic fragrance includes one or more combinations of citrate, succinate, benzoate, and acetate.

8. A method for preparing the fragrance-modified silicone grease according to any one of claims 1 to 7, characterized in that, The preparation method includes: Weigh each raw material according to the specified weight proportions and mix them evenly. The mixture is then heated and stirred to prepare the flavor-modified silicone grease.

9. The preparation method according to claim 8, characterized in that, The preparation method includes: The silicone oil and tackifier are mixed, heated and stirred until homogeneous to obtain a mixture. The fragrance is added to the mixture, and heating and stirring are continued. After cooling, the fragrance-modified silicone grease is obtained.

10. The application of the fragrance-modified silicone grease according to any one of claims 1 to 7 or the fragrance-modified silicone grease prepared by the preparation method according to any one of claims 8 to 9 in the preparation of refrigerator guide rails.

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