TPE (thermoplastic elastomer) material with imitated silica gel hand feeling and preparation method of TPE material

Abstract

The invention relates to the technical field of TPE materials, and particularly discloses a TPE material with imitated silica gel hand feeling and a preparation method of the TPE material. The TPE material comprises the following raw material components in parts by weight: 40 to 80 parts of 65A-TPV, 10 to 30 parts of SEBS, 10 to 30 parts of white oil, 0.1 to 5 parts of silicone oil, 5 to 25 parts of high-toughness PP, 1 to 10 parts of silicone, 1 to 5 parts of a dispersing agent and 0.1 to 0.5 part of an antioxidant. The 65A-TPV can provide fine and smooth hand feeling, the SEBS can provide dry and comfortable hand feeling, and then the white oil, the silicone oil and the silicone are matched, so that the hand feeling of the obtained TPE material is improved.

Description

Technical Field

[0001] The present application relates to the technical field of TPE materials, and in particular to a TPE material with a silicone-like feel and a preparation method thereof. Background Art

[0002] Thermoplastic elastomer TPE, also known as artificial rubber or synthetic rubber, has the excellent properties of high elasticity, aging resistance, and oil resistance of traditional cross-linked vulcanized rubber, and at the same time has the characteristics of convenient processing and wide processing methods of ordinary plastics. However, conventional TPE materials generally feel dry and have a strong damping feeling. At the same time, they lack the delicate and smooth feel of silicone and cannot replace silicone. Summary of the invention

[0003] In order to improve the feel of TPE materials, the present application provides a TPE material with a silicone-like feel and a preparation method thereof.

[0004] In the first aspect, the present application provides a TPE material with a silicone-like feel, which adopts the following technical solution: A TPE material with a silicone-like feel, wherein the raw materials of the TPE material include the following components in parts by weight: 65A-TPV 40-80 parts; SEBS 10-30 parts; 10-30 parts of white oil; Silicone oil 0.1-5 parts; High toughness PP 5-25 parts; 1-10 parts of silicone; 1 to 5 parts of dispersant; Antioxidant 0.1-0.5 parts.

[0005] By adopting the above technical solution, 65A-TPV can provide a delicate feel, SEBS can provide a dry feel, and the combination of white oil, silicone oil and silicone can improve the feel of the TPE material.

[0006] In a specific implementation scheme, the raw materials of the 65A-TPV include the following components in parts by weight: 30-60 parts of EPMD, 20-40 parts of white oil, 10-30 parts of heat-resistant PP, 1-15 parts of calcium powder, 1-10 parts of silicone, 1-5 parts of dispersant, 0.1-0.5 parts of antioxidant, 0.01-0.1 parts of PE wax, 0.1-0.5 parts of diphenylmethane bismaleimide, and 0.05-0.5 parts of curing crosslinking agent C75.

[0007] In a specific embodiment, the preparation method of 65A-TPV comprises the following steps: EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, and curing crosslinking agent C75 are sequentially added to the mixing tank of the extruder and stirred, and then white oil is added to the side feed for conveying, extruded and granulated to obtain 65A-TPV.

[0008] By adopting the above technical scheme, 65A-TPV with better hand feel is first prepared using EPMD, white oil, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, and curing cross-linking agent C75, and then it is used as a raw material to prepare a TPE material with better hand feel.

[0009] In a specific implementation manner, the extruder has a screw length-to-diameter ratio of 56:1, and a large-angle shear block ratio of >30%.

[0010] In a specific embodiment, the dispersant includes Evonik E525.

[0011] By adopting the above technical solutions, Evonik E525 can not only improve the dispersion performance of each component in the TPE material raw materials, but also further improve the feel of the TPE material.

[0012] In a specific embodiment, the antioxidant includes BASF168.

[0013] In the second aspect, the present application provides a method for preparing a TPE material with a silicone-like feel, which adopts the following technical solution: A method for preparing a TPE material with a silicone-like feel, comprising the following steps: Oil mixing: Stir white oil and silicone oil at 45-55°C to obtain mixed oil; Oil filling: add the mixed oil into SEBS, stir and mix evenly, let stand to obtain a mixture; Ingredients: Add 65A-TPV, high-toughness PP, silicone, dispersant, and antioxidant to the mixture, stir at 40-60°C to obtain the standby material; Extrusion granulation: Add the spare material into the extruder, extrude and granulate to obtain TPE material.

[0014] By adopting the above technical scheme, the white oil and silicone oil are first stirred and mixed to obtain a mixed oil, and then the mixed oil is added to SEBS, stirred, and allowed to stand to obtain a mixture. Then, 65A-TPV, high-toughness PP, silicone, dispersant, and antioxidant are added to the mixture, mixed, and finally extruded and granulated to obtain a TPE material with a better feel.

[0015] In a specific embodiment, in the extrusion granulation step, the aspect ratio of the screw of the extruder is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. In this application, 65A-TPV can provide a delicate feel, SEBS can provide a dry feel, and the combination of white oil, silicone oil, and silicone can improve the feel of the TPE material; 2. In this application, 65A-TPV with a good hand feel is first prepared using EPMD, white oil, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, and curing crosslinking agent C75, and then used as a raw material to prepare a TPE material with a good hand feel; 3. The method of the present application is to first stir and mix the white oil and silicone oil to obtain a mixed oil, then add the mixed oil to SEBS, stir, and let stand to obtain a mixture, and then add 65A-TPV, high-toughness PP, silicone, dispersant, and antioxidant to the mixture, mix the materials, and finally extrude and granulate to obtain a TPE material with a good feel. DETAILED DESCRIPTION

[0017] The present application is further described in detail below with reference to the embodiments.

[0018] All raw materials in the examples can be obtained from the market. EPMD is Mitsui 3092; white oil is Formosa Plastics 500N; heat-resistant PP is Thai Petrochemical 1100NK; calcium powder is Zhengtian Chemical 3800; silicone is Evonik MB050-001; dispersant is Evonik E525; antioxidant is BASF168; PE wax is Honeywell A-C6A; curing crosslinking agent C75 is Nouryon C75; SEBS is TSRC 6151; silicone oil is Wacker 12500; high-toughness PP is Formosa Plastics 5090T; TPV is provided by Haozheng New Materials Technology (Dongguan) Co., Ltd., model 101-87.

[0019] Preparation Example Preparation Example 1 Preparation Example 1 provides a method for preparing 65A-TPV, comprising the following steps: EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide and curing cross-linking agent C75 are added to the mixing tank of the extruder in turn and stirred for 5 minutes. Then, the white oil is added to the side feed for conveying, extruded and granulated to obtain 65A-TPV; the screw aspect ratio of the extruder is 56:1, and the proportion of large-angle shear blocks is greater than 30%; the dispersant is Evonik E525; the antioxidant is BASF168; the weight ratio of EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, curing cross-linking agent C75 and white oil is 30:10:1:1:1:0.1:0.01:0.1:0.05:20.

[0020] Preparation Example 2 Preparation Example 2 provides a method for preparing 65A-TPV, comprising the following steps: EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, and curing cross-linking agent C75 are added to the mixing tank of the extruder in turn and stirred for 5 minutes. Then, the white oil is added to the side feed for conveying, extruded and granulated to obtain 65A-TPV; the screw aspect ratio of the extruder is 56:1, and the proportion of large-angle shear blocks is greater than 30%; the dispersant is Evonik E525; the antioxidant is BASF168; the weight ratio of EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, curing cross-linking agent C75, and white oil is 45:20:8:5.5:3:0.3:0.05:0.3:0.25:30.

[0021] Preparation Example 3 Preparation Example 3 provides a method for preparing 65A-TPV, comprising the following steps: EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, and curing crosslinking agent C75 are added to the mixing tank of the extruder in turn and stirred for 5 minutes. Then, the white oil is added to the side feed for conveying, extruded and granulated to obtain 65A-TPV; the screw aspect ratio of the extruder is 56:1, and the proportion of large-angle shear blocks is greater than 30%; the dispersant is Evonik E525; the antioxidant is BASF168; the weight ratio of EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, curing crosslinking agent C75, and white oil is 60:30:15:10:5:0.5:0.1:0.5:0.5:40. Example

[0022] Example 1 Embodiment 1 provides a method for preparing a TPE material with a silicone-like feel, comprising the following steps: Oil mixing: Add 10 kg white oil and 0.1 kg silicone oil into a mixing barrel and stir at 45°C for 5 minutes to obtain a mixed oil; Oil filling: add the mixed oil into 10kg SEBS, stir for 5min, and let stand for 24h to obtain a mixture; Ingredients: 40 kg of 65A-TPV in Preparation Example 1, 5 kg of high-toughness PP, 1 kg of silicone, 1 kg of dispersant, and 0.1 kg of antioxidant were added to the mixture, and then added to a high-speed stirring tank, and stirred at 40° C. for 8 minutes to obtain a standby material; wherein the dispersant was Evonik E525; and the antioxidant was BASF168; Extrusion granulation: Add the spare material into the extruder, use a cloth soft connection between the mixing cylinder and the extruder discharge barrel to avoid excessive drop in the discharge, which will cause stratification of the components and affect the uniformity of the materials. Extrusion granulation is performed to obtain TPE material; the extruder screw aspect ratio is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

[0023] Example 2 Embodiment 2 provides a method for preparing a TPE material with a silicone-like feel, comprising the following steps: Oil mixing: Add 10 kg white oil and 0.1 kg silicone oil into a mixing barrel and stir at 45°C for 5 minutes to obtain a mixed oil; Oil filling: add the mixed oil into 10kg SEBS, stir for 5min, and let stand for 24h to obtain a mixture; Ingredients: 40 kg of 65A-TPV in Preparation Example 2, 5 kg of high-toughness PP, 1 kg of silicone, 1 kg of dispersant, and 0.1 kg of antioxidant were added to the mixture, and then added to a high-speed stirring tank, and stirred at 40° C. for 8 minutes to obtain a standby material; wherein the dispersant was Evonik E525; and the antioxidant was BASF168; Extrusion granulation: Add the spare material into the extruder, use a cloth soft connection between the mixing cylinder and the extruder discharge barrel to avoid excessive drop in the discharge, which will cause stratification of the components and affect the uniformity of the materials. Extrusion granulation is performed to obtain TPE material; the extruder screw aspect ratio is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

[0024] Example 3 Embodiment 3 provides a method for preparing a TPE material with a silicone-like feel, comprising the following steps: Oil mixing: Add 10 kg white oil and 0.1 kg silicone oil into a mixing barrel and stir at 45°C for 5 minutes to obtain a mixed oil; Oil filling: add the mixed oil into 10kg SEBS, stir for 5min, and let stand for 24h to obtain a mixture; Ingredients: 40 kg of 65A-TPV in Preparation Example 3, 5 kg of high-toughness PP, 1 kg of silicone, 1 kg of dispersant, and 0.1 kg of antioxidant were added to the mixture, and then added to a high-speed stirring tank, and stirred at 40° C. for 8 minutes to obtain a standby material; wherein the dispersant was Evonik E525; and the antioxidant was BASF168; Extrusion granulation: Add the spare material into the extruder, use a cloth soft connection between the mixing cylinder and the extruder discharge barrel to avoid excessive drop in the discharge, which will cause stratification of the components and affect the uniformity of the materials. Extrusion granulation is performed to obtain TPE material; the extruder screw aspect ratio is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

[0025] Example 4 Embodiment 4 provides a method for preparing a TPE material with a silicone-like feel, comprising the following steps: Oil mixing: Add 20 kg white oil and 2.5 kg silicone oil into a mixing barrel and stir at 45 °C for 5 min to obtain a mixed oil; Oil filling: add the mixed oil into 20kg SEBS, stir for 5min, let stand for 24h to obtain a mixture; Ingredients: 60 kg of 65A-TPV in Preparation Example 2, 15 kg of high-toughness PP, 5.5 kg of silicone, 3 kg of dispersant, and 0.3 kg of antioxidant were added to the mixture, and then added to a high-speed stirring tank, and stirred at 40° C. for 8 minutes to obtain a standby material; wherein the dispersant is Evonik E525; and the antioxidant is BASF168; Extrusion granulation: Add the spare material into the extruder, use a cloth soft connection between the mixing cylinder and the extruder discharge barrel to avoid excessive drop in the discharge, which will cause stratification of the components and affect the uniformity of the materials. Extrusion granulation is performed to obtain TPE material; the extruder screw aspect ratio is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

[0026] Example 5 Embodiment 5 provides a method for preparing a TPE material with a silicone-like feel, comprising the following steps: Oil mixing: Add 30kg white oil and 5kg silicone oil into a mixing barrel and stir at 45°C for 5 minutes to obtain a mixed oil; Oil filling: add the mixed oil into 30kg SEBS, stir for 5min, let stand for 24h to obtain a mixture; Ingredients: 80 kg of 65A-TPV in Preparation Example 2, 25 kg of high-toughness PP, 10 kg of silicone, 5 kg of dispersant, and 0.5 kg of antioxidant were added to the mixture, and then added to a high-speed stirring tank, and stirred at 40° C. for 8 minutes to obtain a standby material; wherein the dispersant was Evonik E525; and the antioxidant was BASF168; Extrusion granulation: Add the spare material into the extruder, use a cloth soft connection between the mixing cylinder and the extruder discharge barrel to avoid excessive drop in the discharge, which will cause stratification of the components and affect the uniformity of the materials. Extrusion granulation is performed to obtain TPE material; the extruder screw aspect ratio is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

[0027] Example 6 Embodiment 6 provides a method for preparing a TPE material with a silicone-like feel, comprising the following steps: Oil mixing: Add 20 kg white oil and 2.5 kg silicone oil into a mixing barrel and stir at 50 °C for 4 min to obtain a mixed oil; Oil filling: add the mixed oil into 20kg SEBS, stir for 5min, let stand for 24h to obtain a mixture; Ingredients: 60 kg of 65A-TPV in Preparation Example 2, 15 kg of high-toughness PP, 5.5 kg of silicone, 3 kg of dispersant, and 0.3 kg of antioxidant were added to the mixture, and then added to a high-speed stirring tank, and stirred at 50° C. for 6 minutes to obtain a standby material; the dispersant was Evonik E525; the antioxidant was BASF168; Extrusion granulation: Add the spare material into the extruder, use a cloth soft connection between the mixing cylinder and the extruder discharge barrel to avoid excessive drop in the discharge, which will cause stratification of the components and affect the uniformity of the materials. Extrusion granulation is performed to obtain TPE material; the extruder screw aspect ratio is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

[0028] Example 7 Embodiment 7 provides a method for preparing a TPE material with a silicone-like feel, comprising the following steps: Oil mixing: Add 20 kg white oil and 2.5 kg silicone oil into a mixing barrel and stir at 55 °C for 3 min to obtain a mixed oil; Oil filling: add the mixed oil into 20kg SEBS, stir for 5min, let stand for 24h to obtain a mixture; Ingredients: 60 kg of 65A-TPV in Preparation Example 2, 15 kg of high-toughness PP, 5.5 kg of silicone, 3 kg of dispersant, and 0.3 kg of antioxidant were added to the mixture, and then added to a high-speed stirring tank, stirred at 60° C. for 5 minutes to obtain a standby material; wherein the dispersant was Evonik E525; and the antioxidant was BASF168; Extrusion granulation: Add the spare material into the extruder, use a cloth soft connection between the mixing cylinder and the extruder discharge barrel to avoid excessive drop in the discharge, which will cause stratification of the components and affect the uniformity of the materials. Extrusion granulation is performed to obtain TPE material; the extruder screw aspect ratio is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

[0029] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that, oil mixing: 10 kg of white oil and 0.1 kg of silicone oil are added into a stirring barrel, and stirred at 45° C. for 5 min to obtain a mixed oil; Oil filling: add the mixed oil into 10kg SEBS, stir for 5min, and let stand for 24h to obtain a mixture; Ingredients: 40 kg TPV, 5 kg high-toughness PP, 1 kg silicone, 1 kg dispersant, and 0.1 kg antioxidant are added to the mixture, and then added to a high-speed stirring tank, stirred at 40° C. for 8 minutes to obtain a standby material; the remaining steps are consistent with Example 1.

[0030] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the ingredients are as follows: 51.1 kg TPV, 5 kg high-toughness PP, 1 kg dispersant, and 0.1 kg antioxidant are added to 10 kg SEBS, and then added to a high-speed stirring tank, stirred at 40° C. for 8 minutes to obtain a standby material; the remaining steps are consistent with Example 1.

[0031] Performance testing Feel and appearance: 90 testers were selected, with each group consisting of ten, corresponding to Examples 1-7 and Comparative Examples 1-2, and the feel of the TPE materials was scored. The average value was taken and the score was 1-10. The higher the score, the better the TPE material.

[0032] Tensile strength: The TPE materials in the embodiments and comparative examples were tested according to ASTM-D412.

[0033] Elongation at break: The TPE materials in the examples and comparative examples were tested according to ASTM-D412.

[0034] Tear strength: The TPE materials in the examples and comparative examples were tested according to ASTM-D624.

[0035] Table 1 Performance test results of TPE materials Combining Example 1 and Comparative Examples 1-2, the feel of the TPE material in Example 1 is the best. It can be seen that when preparing the TPE material, the homemade 65A-TPV as well as white oil, silicone oil and silicone are added to the raw materials, thereby improving the feel of the prepared TPE material.

[0036] In combination with Examples 1-3, the performance of the TPE material in Example 2 is the best. It can be seen that when preparing 65A-TPV, the ratio of the raw materials EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, curing crosslinking agent C75, and white oil in Preparation Example 2 is optimal, so that the performance of 65A-TPV is better.

[0037] Combining Example 2, Example 4 and Example 5, it can be seen that when preparing TPE materials, according to the raw material ratios in Example 2, Example 4 and Example 5, the performance of the obtained TPE materials is better.

[0038] Combining Example 4, Example 6 and Example 7, the performance of the TPE material in Example 6 is the best. It can be seen that when preparing the TPE material, the preparation process in Example 6 is the best.

[0039] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A TPE material with a silicone-like feel, characterized in that: The raw materials of the TPE material include the following components in parts by weight: 65A-TPV 40~80 copies; SEBS 10~30 parts; 10~30 parts of white oil; Silicone oil 0.1~5 parts; High toughness PP 5~25 parts; Silicone 1-10 parts; Dispersant 1~5 parts; Antioxidant 0.1~0.5 parts.

2. The TPE material with a silicone-like feel according to claim 1, characterized in that: The raw materials of the 65A-TPV include the following components in parts by weight: 30-60 parts of EPMD, 20-40 parts of white oil, 10-30 parts of heat-resistant PP, 1-15 parts of calcium powder, 1-10 parts of silicone, 1-5 parts of dispersant, 0.1-0.5 parts of antioxidant, 0.01-0.1 parts of PE wax, 0.1-0.5 parts of diphenylmethane bismaleimide, and 0.05-0.5 parts of curing crosslinking agent C75.

3. The TPE material with a silicone-like feel according to claim 2, characterized in that: The preparation method of the 65A-TPV comprises the following steps: EPMD, heat-resistant PP, calcium powder, silicone, dispersant, antioxidant, PE wax, diphenylmethane bismaleimide, and curing crosslinking agent C75 are sequentially added to the mixing tank of the extruder and stirred, and then white oil is added to the side feed for conveying, extruded and granulated to obtain 65A-TPV.

4. The TPE material with a silicone-like feel according to claim 3, characterized in that: The extruder has a screw length-to-diameter ratio of 56:1, and a large-angle shear block ratio of >30%.

5. The TPE material with a silicone-like feel according to claim 1, characterized in that: The dispersant includes Evonik E525.

6. The TPE material with a silicone-like feel according to claim 1, characterized in that: The antioxidant includes BASF168.

7. A method for preparing a TPE material with a silicone-like feel as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Oil mixing: Stir white oil and silicone oil at 45-55°C to obtain mixed oil; Oil filling: add the mixed oil into SEBS, stir and mix evenly, let stand to obtain a mixture; Ingredients: Add 65A-TPV, high-toughness PP, silicone, dispersant, and antioxidant to the mixture, stir at 40-60°C to obtain the standby material; Extrusion granulation: Add the spare material into the extruder, extrude and granulate to obtain TPE material.

8. The method for preparing a TPE material with a silicone-like feel according to claim 7, characterized in that: In the extrusion granulation step, the aspect ratio of the screw of the extruder is greater than 44:1, and the proportion of large-angle shear blocks is greater than 30%.

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