Silk-hand-feeling surface glue for silica gel leather and preparation method of smooth-hand-feeling surface glue

Abstract

The invention relates to the technical field of silica gel leather, in particular to silica gel leather silky hand feeling surface glue and a preparation method thereof, and the surface glue comprises the following materials in parts by weight: 30-70 parts of base glue, 20-50 parts of vinyl silicone resin, 10-30 parts of raw rubber, 80-150 parts of a diluent, 10-30 parts of hand feeling powder, 8-15 parts of hydrogen-containing silicone oil, 0-15 parts of vinyl silicone oil, 0.07-0.2 part of an inhibitor and 0.3-0.5 part of a platinum catalyst. The method comprises the following steps: A, preparing base rubber; b, sequentially adding the base rubber, the raw rubber, the vinyl silicone resin and the diluent into a stirrer, and stirring for 8-15 minutes until the rubber body is uniform and free of particles; wherein the weight part of the added diluent is 56 to 105; c, feeding the hand feeling powder into the stirrer, and then stirring for 8-15 minutes; and D, adding the vinyl silicone oil, the hydrogen-containing silicone oil, the inhibitor, the platinum catalyst and the remaining diluent into a stirrer, and then stirring the stirrer in a vacuum state for 8-15 minutes to prepare the silky-hand feeling surface glue for the silica gel leather.

Description

Technical Field

[0001] The invention relates to the technical field of silicone leather, in particular to a silicone leather silky feel surface adhesive and a preparation method thereof. Background Art

[0002] Silicone leather is generally composed of a base material, a base rubber, a middle rubber, and a surface rubber. The surface rubber provides various hand feelings, such as a smooth feeling like ice silk or a dry and crisp hand feeling. Currently, the surface rubber of silicone leather on the market is mostly sprayed with hand-feeling oil. Since the hand-feeling oil is very thin and has poor wear resistance, it will be worn off in about three months, causing the silicone leather to lose its original hand feeling. Summary of the invention

[0003] In view of the problems of the prior art, the present invention provides a silicone leather silky feel surface adhesive and a preparation method thereof, and prepares the surface adhesive with a thick feel and good wear resistance by roller coating.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a silicone leather silky feel surface adhesive, comprising the following materials in parts by weight:

[0006]

[0007]

[0008] Furthermore, the base glue comprises the following materials in parts by weight:

[0009]

[0010] Furthermore, the white carbon black is HS-200 white carbon black, and the specific surface area is 200-400m 2 / g.

[0011] Furthermore, the molecular weight of the raw rubber is 550,000-650,000, and the vinyl content is 0.95-1.05%;

[0012] The hydrogen content of the hydrogen-containing silicone oil is 0.5-0.75%.

[0013] Furthermore, the viscosity of the vinyl silicone resin is 50,000-100,000, and the vinyl content is 1-1.5%.

[0014] Furthermore, the diluent is an alkane solvent;

[0015] The inhibitor is one or both of ethynyl cyclohexanol and methyl butynol.

[0016] The present invention also provides a method for preparing the above-mentioned silicone leather silky feel surface adhesive, which is characterized by comprising the following steps:

[0017] A. prepare base glue;

[0018] B. Add the base rubber, raw rubber, vinyl silicone resin and diluent into the mixer in sequence, and stir for 8-15 minutes until the colloid is uniform and free of particles; wherein the weight portion of the added diluent is 56-105 parts;

[0019] C. Put the hand powder into the blender and blend for 8-15 minutes;

[0020] D. Add vinyl silicone oil, hydrogen silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then blend the blender under vacuum for 8-15 minutes to obtain a silicone leather silky feel surface adhesive.

[0021] Furthermore, step A specifically includes:

[0022] A1. Vinyl silicone oil, hexamethyldisilazane and water are sequentially added to a kneader and stirred for 4-6 minutes; wherein the weight of the vinyl silicone oil is 40-50% of the total weight of the vinyl silicone oil;

[0023] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20-30min; wherein step A2 is performed multiple times;

[0024] A3. Continue to control the kneading machine to perform kneading action for 3-5 hours;

[0025] A4. The kneading machine is heated to 140-160°C, and then the kneading machine is evacuated and maintained in a vacuum state for 1.5-2.5 hours;

[0026] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20-30min to knead the material in the kneader uniformly; wherein step A5 is performed several times;

[0027] A6. Continue kneading for 25-35 minutes, and then take out the formed base rubber from the kneader.

[0028] Furthermore, step A2 is performed four times, and the weight of white carbon black added each time step A2 is 28-32%, 28-32%, 28-32%, and 28-32% of the total weight of white carbon black.

[0029] Furthermore, step A5 is performed three times, and the weight of the vinyl silicone oil added in each step A5 accounts for 8-12%, 13-17%, and 28-32% of the total weight of the vinyl silicone oil.

[0030] Beneficial effects of the present invention: The surface adhesive prepared by the present invention has a silky feel due to the characteristics of the hand feel powder, hydrogen-containing silicone oil and vinyl silicone oil, and because the hand feel characteristics are based on the material itself rather than spraying oil, it will not wear out as the number of times it is touched increases; in addition, based on the amount of base adhesive and vinyl silicone resin used and prepared by multiple stirring and kneading, the wear resistance effect is better. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with examples, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with examples.

[0032] The present invention provides a silicone leather silky feel surface adhesive, comprising the following materials in parts by weight:

[0033]

[0034]

[0035] Wherein, the base glue comprises the following materials in parts by weight:

[0036]

[0037] The white carbon black is HS-200 white carbon black, which is prepared by a gas phase method and has a specific surface area of ​​200-400m 2 / g.

[0038] The molecular weight of the raw rubber is 550,000-650,000, and the vinyl content is 0.95-1.05%;

[0039] Wherein, the hydrogen content of the hydrogen-containing silicone oil is 0.5-0.75%.

[0040] The viscosity of the acetic acid silicone resin is 50,000-100,000, and the vinyl content is 1-1.5%.

[0041] Wherein, the diluent is an alkane solvent;

[0042] Wherein, the inhibitor is one or both of ethynyl cyclohexanol and methyl butynol.

[0043] The surface adhesive provided by the present invention is prepared by the following method:

[0044] A. prepare base glue;

[0045] B. Add the base rubber, raw rubber, vinyl silicone resin and diluent into the mixer in sequence, and stir for 8-15 minutes until the colloid formed by stirring is uniform and free of particles; wherein the weight portion of the added diluent is 56-105 parts;

[0046] C. Put the hand powder into the blender and blend for 8-15 minutes;

[0047] D. Add vinyl silicone oil, hydrogen silicone oil, inhibitor, platinum catalyst and the remaining diluent to a mixer, and then stir the mixer under vacuum for 8-15 minutes to prepare a silicone leather silky feel surface adhesive. Specifically, the material prepared in step D is applied to the middle layer adhesive by roller coating to form a silky feel surface adhesive.

[0048] In order to ensure that each step is executed in place, the present invention can be used in conjunction with an intelligent system, specifically: in step B, a visual device is used to acquire images of the inside of the mixer, and whether the colloid has particles is determined from the acquired images; when it is determined that the colloid has no particles, it is necessary to continue observing for 30-60 seconds, and stirring is always performed during the observation process. When the colloid still has no particles within the observation time, it proves that the mixing meets the requirements and the hand-feeling powder can be added.

[0049] The visual device can use an industrial camera, and the specific pixels can be set according to the particle conditions observed by the naked eye. The use of a visual device combined with in-depth training is more accurate than human observation through the naked eye, so as to ensure the performance of the surface adhesive and the uniformity of material mixing.

[0050] After the execution of step C, the material obtained has a certain viscosity due to its stickiness, and part of it will stick to the inner wall of the mixer (i.e., the cylinder wall). Therefore, before executing step D, it is necessary to shovel the material on the inner wall of the mixer, and then perform step D to add a diluent for stirring to reduce the viscosity. The action of shoveling the material can be done by manual shoveling or mechanical shoveling, and the inner wall of the mixer is checked in combination with a visual device. When it is checked that the thickness of the material stuck to the inner wall of the mixer is lower than the preset value and the area occupied by the stuck material is smaller than the preset value, step D can be executed.

[0051] In the above method, step A specifically includes:

[0052] A1. Vinyl silicone oil, hexamethyldisilazane and water are sequentially added to a kneader and stirred for 4-6 minutes; wherein the weight of the vinyl silicone oil is 40-50% of the total weight of the vinyl silicone oil;

[0053] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20-30min; wherein step A2 is performed multiple times;

[0054] A3. Continue to control the kneading machine to perform kneading action for 3-5 hours;

[0055] A4. The kneading machine is heated to 140-160°C, and then the kneading machine is evacuated and maintained in a vacuum state for 1.5-2.5 hours;

[0056] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20-30min to knead the material in the kneader uniformly; wherein step A5 is performed several times;

[0057] A6. Continue kneading for 25-35 minutes, and then take out the formed base rubber from the kneader.

[0058] The preparation of the base rubber is mainly done by kneading the vinyl silicone oil, hexamethyldisilazane and water through a kneading machine, and then adding white carbon black for kneading. Hexamethyldisilazane modifies white carbon black, which can change the hydrophilicity of white carbon black to lipophilicity, making it easier to disperse. The high-speed shearing of the kneading machine makes the vinyl silicone oil and white carbon black combine more fully, which is convenient for improving the performance of the base rubber.

[0059] In step A5, the uniformity of the material is judged by the system after the visual device captures the image. The main basis for judgment is: capture the material in the captured image, and then judge whether the grayscale of different positions of the material is consistent or the difference is within 3%. If it exceeds 3%, it is necessary to continue kneading. The grayscale judgment of the material needs to last for at least 30 seconds, that is, in the image captured within 30 seconds, the error of the grayscale value of different positions of the material is less than 3%, which can be considered to be kneaded uniformly.

[0060] In order to reduce errors, all captured images need to undergo brightness compensation, that is, after comparing the current brightness inside the kneading machine with the preset reference brightness, the image is brightness compensated based on the difference between the two to ensure that the grayscale of the material displayed in all images is within the preset reference brightness.

[0061] In this embodiment, step A2 is performed four times, and the weight of white carbon black added each time step A2 is 28-32%, 28-32%, 28-32%, and 28-32% of the total weight of white carbon black.

[0062] In this embodiment, step A5 is performed three times, and the weight of the vinyl silicone oil added in each step A5 accounts for 8-12%, 13-17%, 28-32% of the total weight of the vinyl silicone oil.

[0063] Example 1

[0064] In this embodiment, the following materials are used in parts by weight: 30 parts of base rubber, 50 parts of vinyl silicone resin, 20 parts of raw rubber, 100 parts of diluent, 10 parts of hand feeling powder, 15 parts of hydrogenated silicone oil, 15 parts of vinyl silicone oil, 0.09 parts of inhibitor, and 0.5 parts of platinum catalyst.

[0065] The base rubber comprises the following materials in parts by weight: 1400 parts of vinyl silicone oil, 450 parts of white carbon black, 80 parts of hexamethyldisilazane, and 20 parts of water.

[0066] The surface adhesive in this embodiment is prepared by the following method:

[0067] A. Prepare the base glue, specifically,

[0068] A1. Vinyl silicone oil, hexamethyldisilazane and water were sequentially added to a kneader and stirred for 5 min; wherein the weight of the vinyl silicone oil was 45% of the total weight of the vinyl silicone oil;

[0069] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20 min; wherein step A2 is performed multiple times;

[0070] A3. Continue to control the kneading machine to perform kneading action for 4 hours;

[0071] A4. The kneading machine was heated to 150°C, and then the kneading machine was evacuated and maintained in a vacuum state for 2 hours;

[0072] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20 minutes to knead the material in the kneader evenly; wherein step A5 is performed several times;

[0073] A6. Kneading was continued for 25 min, and then the molded base rubber was removed from the kneading machine;

[0074] B. Add the base rubber, raw rubber, vinyl silicone oil, vinyl silicone resin and diluent into the mixer in sequence, and stir for 10 minutes until the colloid formed by stirring is uniform and free of particles; wherein the weight portion of the added diluent is 70 parts;

[0075] C. Put the hand powder into the blender and blend for 10 minutes;

[0076] D. Add vinyl silicone oil, hydrogenated silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then blend the blender under vacuum for 10 minutes to obtain a silicone leather with a silky feel.

[0077] Example 2

[0078] In this embodiment, the following materials are used in parts by weight: 40 parts of base rubber, 50 parts of vinyl silicone resin, 10 parts of raw rubber, 130 parts of diluent, 30 parts of hand feeling powder, 15 parts of hydrogenated silicone oil, 10 parts of vinyl silicone oil, 0.11 parts of inhibitor, and 0.5 parts of platinum catalyst.

[0079] The base glue comprises the following materials in parts by weight: 1600 parts of vinyl silicone oil, 550 parts of white carbon black, 110 parts of hexamethyldisilazane, and 33 parts of water.

[0080] The surface adhesive in this embodiment is prepared by the following method:

[0081] A. Prepare the base glue, specifically,

[0082] A1. Vinyl silicone oil, hexamethyldisilazane and water were sequentially added to a kneader and stirred for 5 min; wherein the weight of the vinyl silicone oil was 45% of the total weight of the vinyl silicone oil;

[0083] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20 min; wherein step A2 is performed multiple times;

[0084] A3. Continue to control the kneading machine to perform kneading action for 4 hours;

[0085] A4. The kneading machine was heated to 150°C, and then the kneading machine was evacuated and maintained in a vacuum state for 2 hours;

[0086] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20 minutes to knead the material in the kneader evenly; wherein step A5 is performed several times;

[0087] A6. Kneading was continued for 25 min, and then the molded base rubber was removed from the kneading machine;

[0088] B. Add the base rubber, raw rubber, vinyl silicone resin and diluent into the mixer in sequence and stir for 10 minutes until the colloid formed by stirring is uniform and free of particles; wherein the weight portion of the added diluent is 90 parts;

[0089] C. Put the hand-feel powder into the blender and blend for 10 minutes;

[0090] D. Add vinyl silicone oil, hydrogenated silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then blend the blender under vacuum for 10 minutes to obtain a silicone leather with a silky feel.

[0091] Example 3

[0092] In this embodiment, the following materials are used in parts by weight: 50 parts of base rubber, 40 parts of vinyl silicone resin, 10 parts of raw rubber, 100 parts of diluent, 20 parts of hand feeling powder, 12 parts of hydrogenated silicone oil, 3 parts of vinyl silicone oil, 0.1 parts of inhibitor, and 0.4 parts of platinum catalyst.

[0093] The base glue comprises the following materials in parts by weight: 1500 parts of vinyl silicone oil, 500 parts of white carbon black, 110 parts of hexamethyldisilazane, and 33 parts of water.

[0094] The surface adhesive in this embodiment is prepared by the following method:

[0095] A. Prepare the base glue, specifically,

[0096] A1. Vinyl silicone oil, hexamethyldisilazane and water were sequentially added to a kneader and stirred for 5 min; wherein the weight of the vinyl silicone oil was 45% of the total weight of the vinyl silicone oil;

[0097] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20 min; wherein step A2 is performed multiple times;

[0098] A3. Continue to control the kneading machine to perform kneading action for 4 hours;

[0099] A4. The kneading machine was heated to 150°C, and then the kneading machine was evacuated and maintained in a vacuum state for 2 hours;

[0100] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20 minutes to knead the material in the kneader evenly; wherein step A5 is performed several times;

[0101] A6. Kneading was continued for 25 min, and then the molded base rubber was removed from the kneading machine;

[0102] B. Add the base rubber, raw rubber, vinyl silicone oil, vinyl silicone resin and diluent into the mixer in sequence, and stir for 10 minutes until the colloid formed by stirring is uniform and free of particles; wherein the weight portion of the added diluent is 70 parts;

[0103] C. Put the hand powder into the blender and blend for 10 minutes;

[0104] D. Add vinyl silicone oil, hydrogenated silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then blend the blender under vacuum for 10 minutes to obtain a silicone leather with a silky feel.

[0105] Example 4

[0106] In this embodiment, the following materials are used in parts by weight: 50 parts of base rubber, 20 parts of vinyl silicone resin, 30 parts of raw rubber, 150 parts of diluent, 25 parts of hand feeling powder, 8 parts of hydrogenated silicone oil, 10 parts of vinyl silicone oil, 0.15 parts of inhibitor, and 0.4 parts of platinum catalyst.

[0107] The base rubber comprises the following materials in parts by weight: 1500 parts of vinyl silicone oil, 500 parts of white carbon black, 100 parts of hexamethyldisilazane, and 30 parts of water.

[0108] The surface adhesive in this embodiment is prepared by the following method:

[0109] A. Prepare the base glue, specifically,

[0110] A1. Vinyl silicone oil, hexamethyldisilazane and water were sequentially added to a kneader and stirred for 5 min; wherein the weight of the vinyl silicone oil was 45% of the total weight of the vinyl silicone oil;

[0111] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20 min; wherein step A2 is performed multiple times;

[0112] A3. Continue to control the kneading machine to perform kneading action for 4 hours;

[0113] A4. The kneading machine was heated to 150°C, and then the kneading machine was evacuated and maintained in a vacuum state for 2 hours;

[0114] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20 minutes to knead the material in the kneader evenly; wherein step A5 is performed several times;

[0115] A6. Kneading was continued for 25 min, and then the molded base rubber was removed from the kneading machine;

[0116] B. Add the base rubber, raw rubber, vinyl silicone oil, vinyl silicone resin and diluent into the mixer in sequence, and stir for 10 minutes until the colloid formed by stirring is uniform and free of particles; wherein the weight portion of the added diluent is 105 parts;

[0117] C. Put the hand-feel powder into the blender and blend for 10 minutes;

[0118] D. Add vinyl silicone oil, hydrogenated silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then blend the blender under vacuum for 10 minutes to obtain a silicone leather with a silky feel.

[0119] Example 5

[0120] In this embodiment, the following materials are used in parts by weight: 70 parts of base rubber, 25 parts of vinyl silicone resin, 5 parts of raw rubber, 130 parts of diluent, 30 parts of hand feeling powder, 10 parts of hydrogenated silicone oil, 15 parts of vinyl silicone oil, 0.11 parts of inhibitor, and 0.5 parts of platinum catalyst.

[0121] The base rubber comprises the following materials in parts by weight: 1600 parts of vinyl silicone oil, 550 parts of white carbon black, 130 parts of hexamethyldisilazane, and 40 parts of water.

[0122] The surface adhesive in this embodiment is prepared by the following method:

[0123] A. Prepare the base glue, specifically,

[0124] A1. Vinyl silicone oil, hexamethyldisilazane and water were sequentially added to a kneader and stirred for 5 min; wherein the weight of the vinyl silicone oil was 45% of the total weight of the vinyl silicone oil;

[0125] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20 min; wherein step A2 is performed multiple times;

[0126] A3. Continue to control the kneading machine to perform kneading action for 4 hours;

[0127] A4. The kneading machine was heated to 150°C, and then the kneading machine was evacuated and maintained in a vacuum state for 2 hours;

[0128] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20 minutes to knead the material in the kneader evenly; wherein step A5 is performed several times;

[0129] A6. Kneading was continued for 25 min, and then the molded base rubber was removed from the kneading machine;

[0130] B. Add the base rubber, raw rubber, vinyl silicone oil, vinyl silicone resin and diluent into the mixer in sequence, and stir for 10 minutes until the colloid formed by stirring is uniform and free of particles; wherein the weight portion of the added diluent is 90 parts;

[0131] C. Put the hand powder into the blender and blend for 10 minutes;

[0132] D. Add vinyl silicone oil, hydrogenated silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then blend the blender under vacuum for 10 minutes to obtain a silicone leather with a silky feel.

[0133] Comparative Example 1

[0134] In this comparative example, the following materials are used in parts by weight: 70 parts of base rubber, 0 parts of vinyl silicone resin, 30 parts of raw rubber, 120 parts of diluent, 20 parts of hand feeling powder, 15 parts of hydrogenated silicone oil, 15 parts of vinyl silicone oil, 0.1 parts of inhibitor, and 0.5 parts of platinum catalyst.

[0135] The base rubber comprises the following materials in parts by weight: 1400 parts of vinyl silicone oil, 450 parts of white carbon black, 80 parts of hexamethyldisilazane, and 20 parts of water.

[0136] The surface adhesive in this embodiment is prepared by the following method:

[0137] A. Prepare the base glue, specifically,

[0138] A1. Vinyl silicone oil, hexamethyldisilazane and water were sequentially added to a kneader and stirred for 5 min; wherein the weight of the vinyl silicone oil was 45% of the total weight of the vinyl silicone oil;

[0139] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20 min; wherein step A2 is performed multiple times;

[0140] A3. Continue to control the kneading machine to perform kneading action for 4 hours;

[0141] A4. The kneading machine was heated to 150°C, and then the kneading machine was evacuated and maintained in a vacuum state for 2 hours;

[0142] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20 minutes to knead the material in the kneader evenly; wherein step A5 is performed several times;

[0143] A6. Kneading was continued for 25 min, and then the molded base rubber was removed from the kneading machine;

[0144] B. Add the base glue, vinyl silicone resin and diluent into the mixer in sequence and stir for 10 minutes until the colloid formed by stirring is uniform and free of particles; wherein the weight portion of the added diluent is 84 parts;

[0145] C. Put the hand powder into the blender and blend for 10 minutes;

[0146] D. Add vinyl silicone oil, hydrogen silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then stir the blender under vacuum for 10 minutes to obtain a silicone leather adhesive.

[0147] Comparative Example 2

[0148] In this comparative example, the following materials are used in parts by weight: 0 parts of base rubber, 50 parts of vinyl silicone resin, 50 parts of raw rubber, 150 parts of diluent, 30 parts of hand feeling powder, 8 parts of hydrogenated silicone oil, 0.15 parts of inhibitor, and 0.5 parts of platinum catalyst.

[0149] The base rubber comprises the following materials in parts by weight: 1400 parts of vinyl silicone oil, 450 parts of white carbon black, 80 parts of hexamethyldisilazane, and 20 parts of water.

[0150] The surface adhesive in this embodiment is prepared by the following method:

[0151] A. Prepare the base glue, specifically,

[0152] A1. Vinyl silicone oil, hexamethyldisilazane and water were sequentially added to a kneader and stirred for 5 min; wherein the weight of the vinyl silicone oil was 45% of the total weight of the vinyl silicone oil;

[0153] A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20 min; wherein step A2 is performed multiple times;

[0154] A3. Continue to control the kneading machine to perform kneading action for 4 hours;

[0155] A4. The kneading machine was heated to 150°C, and then the kneading machine was evacuated and maintained in a vacuum state for 2 hours;

[0156] A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20 minutes to knead the material in the kneader evenly; wherein step A5 is performed several times;

[0157] A6. Kneading was continued for 25 min, and then the molded base rubber was removed from the kneading machine;

[0158] B. Add the base glue, vinyl silicone resin and diluent to the mixer in sequence and stir for 10 minutes until the colloid formed by stirring is uniform and free of particles; wherein the weight portion of the added diluent is 105 parts;

[0159] C. Put the hand powder into the blender and blend for 10 minutes;

[0160] D. Add vinyl silicone oil, hydrogen silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then stir the blender under vacuum for 10 minutes to obtain a silicone leather adhesive.

[0161] The test results of each sample are shown in the following table:

[0162]

[0163] In the above test results, the viscosity test was performed by a rotary viscometer at 25°C; the Martindale wear test was performed at a test speed of 48 times / min and a load of 585g to measure the weight loss after 75,000 frictions.

[0164] In the comparative group 1, due to the absence of vinyl silicone resin, the hardness was significantly reduced, and more obvious wear occurred after the Martindale test.

[0165] In comparison group 2, since no base rubber was added, its tensile strength and tear strength were significantly reduced, and more obvious wear and tear occurred after the Martindale test.

[0166] It can be seen from the above test results that the silicone leather silky feel surface adhesive prepared by the present invention has excellent viscosity, hardness, tensile strength, tear strength and wear resistance; because it has the feel powder, it can be used as a surface adhesive to ensure a silky feel while ensuring the feel and service life.

[0167] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A silicone leather silky feel surface adhesive, characterized in that: The composition comprises the following materials in parts by weight:

2. The silicone leather silky feel adhesive according to claim 1, characterized in that: The base glue comprises the following materials in parts by weight:

3. The silicone leather silky feel adhesive according to claim 2, characterized in that: The white carbon black is HS-200 white carbon black, and the specific surface area is 200-400m 2 / g.

4. The silicone leather silky feel adhesive according to claim 1, characterized in that: The molecular weight of the raw rubber is 550,000-650,000, and the vinyl content is 0.95-1.05%; The hydrogen content of the hydrogen-containing silicone oil is 0.5-0.75%.

5. The silicone leather silky feel adhesive according to claim 1, characterized in that: The viscosity of the vinyl silicone resin is 50,000-100,000 and the vinyl content is 1-1.5%.

6. The silicone leather silky feel adhesive according to claim 1, characterized in that: The diluent is an alkane solvent; The inhibitor is one or both of ethynyl cyclohexanol and methyl butynol.

7. A method for preparing the silicone leather silky feel surface adhesive according to any one of claims 1 to 6, characterized in that: The following steps are involved: A. prepare base glue; B. Add the base rubber, raw rubber, vinyl silicone resin and diluent into the mixer in sequence, and stir for 8-15 minutes until the colloid is uniform and free of particles; wherein the weight portion of the added diluent is 56-105 parts; C. Put the hand powder into the blender and blend for 8-15 minutes; D. Add vinyl silicone oil, hydrogen silicone oil, inhibitor, platinum catalyst and the remaining diluent into a blender, and then blend the blender under vacuum for 8-15 minutes to obtain a silicone leather silky feel surface adhesive.

8. The preparation method according to claim 7, characterized in that: Step A specifically includes: A1. Vinyl silicone oil, hexamethyldisilazane and water are sequentially added to a kneader and stirred for 4-6 minutes; wherein the weight of the vinyl silicone oil is 40-50% of the total weight of the vinyl silicone oil; A2. The corresponding parts by weight of white carbon black are put into a kneader and kneaded for 20-30min; wherein step A2 is performed multiple times; A3. Continue to control the kneading machine to perform kneading action for 3-5 hours; A4. The kneading machine is heated to 140-160°C, and then the kneading machine is evacuated and maintained in a vacuum state for 1.5-2.5 hours; A5. The corresponding parts by weight of vinyl silicone oil are put into a kneader and kneaded for 20-30min to knead the material in the kneader uniformly; wherein step A5 is performed several times; A6. Continue kneading for 25-35 minutes, and then take out the formed base rubber from the kneader.

9. The preparation method according to claim 8, characterized in that: The step A2 is performed four times, and the weight of the white carbon black added each time the step A2 is performed is 28-32%, 28-32%, 28-32%, and 28-32% of the total weight of the white carbon black.

10. The preparation method according to claim 8, characterized in that: The step A5 is performed three times, and the weight of the vinyl silicone oil added in each step A5 accounts for 8-12%, 13-17%, and 28-32% of the total weight of the vinyl silicone oil.

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