Nylon composition suitable for automobile electric pedal and preparation method thereof

Abstract

The invention discloses a nylon composition suitable for an automobile electric pedal and a preparation method of the nylon composition. The nylon composition is prepared from MXD6 with amino, zinc oxide modified MXD6, glass fibers, modified nano kaolin, modified silicon carbide, negative ion powder, polytetrafluoroethylene and calcium stearate. According to the invention, the zinc oxide is acidized to prepare zinc oxide with a carboxyl functional group and can react with amino in MXD6, the silicon nitride is hydroxylated to prepare silicon carbide with a hydroxyl functional group and can react with carboxyl in MXD6, and the nano kaolin is acidized to prepare nano kaolin with a carboxyl functional group and can react with amino in MXD6. The nylon composition has excellent mechanical properties by adding the negative ion powder and compounding the glass fiber, polytetrafluoroethylene and calcium stearate, can improve the content of negative ions in air, can replace aluminum alloy and other metal materials to prepare various accessories of automobile electric pedals, and makes up the market blank.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile electric pedals, and particularly relates to a nylon composition suitable for automobile electric pedals and a preparation method thereof. Background Art

[0002] Automobile electric foot pedals are electric mechanisms that facilitate the driver and passengers to get on and off the vehicle. They can be automatically extended or retracted according to the driver and passengers opening or closing the door. They are usually installed on high-chassis models such as commercial vehicles, SUVs, and off-road vehicles. At present, the accessories of existing automobile electric foot pedals are mainly made of metal materials through die-casting and machining, which requires large equipment investment and high cost.

[0003] With the rapid development of the engineering plastics industry, engineering plastics are widely used in electronics, automobiles, construction, office equipment, machinery, aerospace and other industries due to their high rigidity, low creep and good mechanical properties. With the continuous improvement of engineering plastic modification technology, "plastics replacing steel" and "plastics replacing wood" have become a popular trend.

[0004] Based on this, the present invention discloses a nylon composition suitable for an automobile electric pedal and a preparation method thereof. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a nylon composition suitable for an automobile electric foot pedal and a preparation method thereof. The nylon composition can replace metal materials to make an automobile electric foot pedal, thereby realizing "plastic replacing steel" in automobile electric foot pedals and filling the market gap.

[0006] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0007] A nylon composition suitable for an automobile electric pedal, wherein the raw materials for preparing the nylon composition include the following components in parts by weight:

[0008] MXD6 with amino functional group 25-45 parts

[0009] MXD6 modified with zinc oxide 20-40 parts

[0010] Glass fiber 30-60 parts

[0011] Modified silicon carbide 10-70 parts

[0012] Modified nano kaolin 20-65 parts

[0013] 3-8 parts of polytetrafluoroethylene

[0014] Calcium stearate 2-10 parts

[0015] 1-10 parts of negative ion powder.

[0016] Furthermore, the nylon composition also includes 1-6 parts of auxiliary agents.

[0017] Furthermore, the zinc oxide-modified MXD6 is zinc oxide with a carboxyl functional group prepared by acidifying zinc oxide with sulfuric acid or hydrochloric acid. The zinc oxide with a carboxyl functional group can react with the amino functional group in MXD6 to obtain zinc oxide-modified MXD6.

[0018] Furthermore, the modified silicon carbide is silicon carbide with hydroxyl functional groups prepared by hydroxylating silicon nitride, and the modified silicon carbide with hydroxyl functional groups can react with the carboxyl functional groups in MXD6.

[0019] Furthermore, the modified nano-kaolin is nano-kaolin with carboxyl functional groups prepared by acidifying nano-kaolin with sulfuric acid or hydrochloric acid, and can react with amino functional groups in MXD6.

[0020] Furthermore, the auxiliary agent is one or a combination of anti-yellowing agent, lubricant, masterbatch, antioxidant, dispersant and compatibilizer.

[0021] The present invention also discloses a method for preparing a nylon composition suitable for an automobile electric pedal, comprising the following steps:

[0022] 1) adding 25-45 parts of MXD6 with amino functional group and 20-40 parts of MXD6 modified with zinc oxide into a high-speed mixer and mixing them evenly, then adding 20-65 parts of modified nano-kaolin and continuing to mix evenly, then adding 10-70 parts of modified silicon carbide, 30-60 parts of glass fiber, 3-8 parts of polytetrafluoroethylene, 2-10 parts of calcium stearate and 1-10 parts of negative ion powder and continuing to mix evenly to obtain a mixture;

[0023] 2) feeding the mixed material into a twin-screw extruder for extrusion granulation to obtain the raw material for preparing the desired nylon composition;

[0024] 3) The raw material of the nylon composition obtained in step 2) is molded by injection molding or blow molding.

[0025] Furthermore, in step 1), the stirring rate of the stirrer is 240-350 r / min, and the stirring time is 20-50 min.

[0026] Furthermore, in step 2), the extrusion temperature of the twin-screw extruder is controlled at 185-210°C.

[0027] Furthermore, in step 3), the injection temperature is 280-360°C, the injection pressure is 100-200 MPa, and the mold temperature is 55-150°C.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention discloses a nylon composition suitable for an automobile electric pedal and a preparation method thereof. The nylon composition is prepared from MXD6 with an amino functional group, MXD6 modified with zinc oxide, glass fiber, modified nano-kaolin, modified silicon carbide, negative ion powder, polytetrafluoroethylene, calcium stearate and functional additives. In the present invention, zinc oxide is acidified with sulfuric acid or hydrochloric acid to prepare zinc oxide with a carboxyl functional group, and the zinc oxide with a carboxyl functional group can react with the amino functional group in MXD6 to obtain zinc oxide-modified MXD6; silicon nitride is hydroxylated to prepare silicon carbide with a hydroxyl functional group, and the modified silicon carbide with a hydroxyl functional group can react with the carboxyl functional group in MXD6; nano-kaolin is acidified with sulfuric acid or hydrochloric acid to prepare nano-kaolin with a carboxyl functional group, and can react with the amino functional group in MXD6; through the above-mentioned multiple The reaction forms a network structure, which integrates the advantages of MXD6, zinc oxide, silicon carbide, and nano-kaolin. It is compounded with glass fiber, polytetrafluoroethylene, and calcium stearate, so that the prepared nylon composition has excellent mechanical properties. The negative ion content in the air can be increased by adding negative ion powder. The nylon composition can replace metal materials such as aluminum alloy to prepare various accessories of automobile electric foot pedals. It is formed by injection molding or blow molding, with simple operation steps, and it is easier to achieve energy saving and cost reduction, which is helpful to realize the "plastic instead of steel" of automobile electric foot pedals and fill the market gap. DETAILED DESCRIPTION

[0030] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0032] The present invention discloses a nylon composition suitable for an automobile electric pedal. The raw materials for preparing the nylon composition include the following components in parts by weight:

[0033] MXD6 with amino functional group 25-45 parts

[0034] MXD6 modified with zinc oxide 20-40 parts

[0035] Glass fiber 30-60 parts

[0036] Modified silicon carbide 10-70 parts

[0037] Modified nano kaolin 20-65 parts

[0038] 3-8 parts of polytetrafluoroethylene

[0039] Calcium stearate 2-10 parts

[0040] 1-10 parts of negative ion powder.

[0041] In the present invention, 1-6 parts of an auxiliary agent can be added to the above nylon composition according to actual needs. The auxiliary agent is one or a combination of anti-yellowing agent, lubricant, masterbatch, antioxidant, dispersant and compatibilizer.

[0042] The zinc oxide-modified MXD6 is a zinc oxide with a carboxyl functional group prepared by acidifying zinc oxide with sulfuric acid or hydrochloric acid. The zinc oxide with a carboxyl functional group can react with the amino functional group in MXD6 to obtain the zinc oxide-modified MXD6.

[0043] The modified silicon carbide is silicon carbide with a hydroxyl functional group prepared by hydroxylating silicon nitride. The modified silicon carbide with a hydroxyl functional group can react with the carboxyl functional group in MXD6.

[0044] The modified nano-kaolin is nano-kaolin with carboxyl functional groups prepared by acidifying nano-kaolin with sulfuric acid or hydrochloric acid, and can react with the amino functional groups in MXD6.

[0045] The present invention also discloses a method for preparing a nylon composition suitable for an automobile electric pedal, comprising the following steps:

[0046] 1) adding 25-45 parts of MXD6 with amino functional group and 20-40 parts of MXD6 modified with zinc oxide into a high-speed mixer and mixing them evenly, then adding 20-65 parts of modified nano-kaolin and continuing to mix evenly, then adding 10-70 parts of modified silicon carbide, 30-60 parts of glass fiber, 3-8 parts of polytetrafluoroethylene, 2-10 parts of calcium stearate and 1-10 parts of negative ion powder and continuing to mix evenly to obtain a mixture;

[0047] 2) feeding the mixed material into a twin-screw extruder for extrusion granulation to obtain the raw material for preparing the desired nylon composition;

[0048] 3) The raw material of the nylon composition obtained in step 2) is molded by injection molding or blow molding.

[0049] In step 1), the stirring rate of the stirrer is 240-350 r / min, and the stirring time is 20-50 min.

[0050] In step 2), the extrusion temperature of the twin-screw extruder is controlled at 185-210°C.

[0051] In step 3), the injection temperature is 280-360°C, the injection pressure is 100-200 MPa, and the mold temperature is 55-150°C.

[0052] The acidification, hydroxylation, reaction of carboxyl and amino, and reaction of hydroxyl and carboxyl in the present invention are all conventional reactions. Therefore, the present invention does not specifically limit parameters such as process conditions, and there is no need to elaborate on them. Those skilled in the art can make flexible and conventional choices based on common knowledge and in combination with actual needs without the need for creative work.

[0053] Example 1

[0054] A nylon composition suitable for an automobile electric pedal, wherein the raw materials for preparing the nylon composition include the following components in parts by weight:

[0055] MXD6 with amino functional group 25 parts

[0056] MXD6 modified with zinc oxide 40 parts

[0057] Glass fiber 44 parts

[0058] Modified silicon carbide 70 parts

[0059] 65 parts of modified nano kaolin

[0060] 8 parts of polytetrafluoroethylene

[0061] Calcium stearate 10 parts

[0062] 10 parts of negative ion powder.

[0063] The zinc oxide-modified MXD6 is a zinc oxide with a carboxyl functional group prepared by acidifying zinc oxide with hydrochloric acid. The zinc oxide with a carboxyl functional group can react with the amino functional group in MXD6 to obtain the zinc oxide-modified MXD6.

[0064] The modified silicon carbide is silicon carbide with a hydroxyl functional group prepared by hydroxylating silicon nitride. The modified silicon carbide with a hydroxyl functional group can react with the carboxyl functional group in MXD6.

[0065] The modified nano-kaolin is nano-kaolin with carboxyl functional groups prepared by acidifying nano-kaolin with hydrochloric acid, and can react with the amino functional groups in MXD6.

[0066] A method for preparing a nylon composition suitable for an automobile electric pedal comprises the following steps:

[0067] 1) adding 25 parts of MXD6 with an amino functional group and 40 parts of MXD6 modified with zinc oxide into a high-speed mixer and mixing them uniformly, then adding 65 parts of modified nano-kaolin and continuing to mix them uniformly, then adding 70 parts of modified silicon carbide, 44 parts of glass fiber, 8 parts of polytetrafluoroethylene, 10 parts of calcium stearate and 10 parts of negative ion powder and continuing to mix them uniformly to obtain a mixture;

[0068] 2) feeding the mixed material into a twin-screw extruder for extrusion granulation to obtain the raw material for preparing the desired nylon composition;

[0069] 3) The raw material of the nylon composition obtained in step 2) is molded by injection molding.

[0070] In step 1), the stirring rate of the stirrer is 350 r / min, and the stirring time is 20 min.

[0071] In step 2), the temperatures of the twin-screw extruder from zone 1 to zone 6 are 185°C, 190°C, 190°C, 192°C, 192°C, and 205°C, respectively.

[0072] In step 3), the injection temperature is 360°C, the injection pressure is 120 MPa, and the mold temperature is 100°C.

[0073] Example 2

[0074] A nylon composition suitable for an automobile electric pedal, wherein the raw materials for preparing the nylon composition include the following components in parts by weight:

[0075] MXD6 with amino functional group 35 parts

[0076] MXD6 modified with zinc oxide 20 parts

[0077] Glass fiber 30 parts

[0078] Modified silicon carbide 50 parts

[0079] 20 parts of modified nano kaolin

[0080] 3 parts of polytetrafluoroethylene

[0081] 5 parts of calcium stearate

[0082] 5 portions of negative ion powder

[0083] 3 parts of anti-yellowing agent.

[0084] The zinc oxide-modified MXD6 is a zinc oxide with a carboxyl functional group prepared by acidifying zinc oxide with sulfuric acid. The zinc oxide with a carboxyl functional group can react with the amino functional group in MXD6 to obtain the zinc oxide-modified MXD6.

[0085] The modified silicon carbide is silicon carbide with a hydroxyl functional group prepared by hydroxylating silicon nitride. The modified silicon carbide with a hydroxyl functional group can react with the carboxyl functional group in MXD6.

[0086] The modified nano-kaolin is nano-kaolin with carboxyl functional groups prepared by acidifying nano-kaolin with sulfuric acid, and can react with the amino functional groups in MXD6.

[0087] A method for preparing a nylon composition suitable for an automobile electric pedal comprises the following steps:

[0088] 1) By weight, 35 parts of MXD6 with an amino functional group and 20 parts of MXD6 modified with zinc oxide are added into a high-speed mixer and mixed evenly, then 20 parts of modified nano-kaolin are added and mixed evenly, and then 50 parts of modified silicon carbide, 30 parts of glass fiber, 3 parts of polytetrafluoroethylene, 5 parts of calcium stearate, 5 parts of negative ion powder and 3 parts of anti-yellowing agent are added and mixed evenly to obtain a mixture;

[0089] 2) feeding the mixed material into a twin-screw extruder for extrusion granulation to obtain the raw material for preparing the desired nylon composition;

[0090] 3) The raw material of the nylon composition obtained in step 2) is molded by injection molding or blow molding.

[0091] In step 1), the stirring rate of the stirrer is 240 r / min, and the stirring time is 50 min.

[0092] In step 2), the extrusion temperature of the twin-screw extruder is controlled at 185°C.

[0093] In step 3), the injection temperature is 280°C, the injection pressure is 200 MPa, and the mold temperature is 150°C.

[0094] The rest is the same as in Example 1.

[0095] Example 3

[0096] A nylon composition suitable for an automobile electric pedal, wherein the raw materials for preparing the nylon composition include the following components in parts by weight:

[0097] MXD6 with amino functional group 45 parts

[0098] MXD6 modified with zinc oxide 22 parts

[0099] Glass fiber 50 parts

[0100] Modified silicon carbide 10 parts

[0101] 20 parts of modified nano kaolin

[0102] 3 parts of polytetrafluoroethylene

[0103] Calcium stearate 2 parts

[0104] 1 portion of negative ion powder.

[0105] The zinc oxide-modified MXD6 is a zinc oxide with a carboxyl functional group prepared by acidifying zinc oxide with hydrochloric acid. The zinc oxide with a carboxyl functional group can react with the amino functional group in MXD6 to obtain the zinc oxide-modified MXD6.

[0106] The modified silicon carbide is silicon carbide with a hydroxyl functional group prepared by hydroxylating silicon nitride. The modified silicon carbide with a hydroxyl functional group can react with the carboxyl functional group in MXD6.

[0107] The modified nano-kaolin is nano-kaolin with carboxyl functional groups prepared by acidifying nano-kaolin with hydrochloric acid, and can react with the amino functional groups in MXD6.

[0108] A method for preparing a nylon composition suitable for an automobile electric pedal comprises the following steps:

[0109] 1) adding 45 parts of MXD6 with amino functional group and 22 parts of MXD6 modified with zinc oxide into a high-speed mixer and mixing them evenly, then adding 20 parts of modified nano-kaolin and continuing to mix evenly, then adding 10 parts of modified silicon carbide, 50 parts of glass fiber, 3 parts of polytetrafluoroethylene, 2 parts of calcium stearate and 1 part of negative ion powder and continuing to mix evenly to obtain a mixture;

[0110] 2) feeding the mixed material into a twin-screw extruder for extrusion granulation to obtain the raw material for preparing the desired nylon composition;

[0111] 3) The raw material of the nylon composition obtained in step 2) is molded by injection molding or blow molding.

[0112] In step 1), the stirring rate of the stirrer is 300 r / min and the stirring time is 30 min.

[0113] In step 2), the extrusion temperature of the twin-screw extruder is controlled at 210°C.

[0114] In step 3), the injection temperature is 360°C, the injection pressure is 160 MPa, and the mold temperature is 125°C.

[0115] The rest is the same as in Example 1.

[0116] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0117] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A nylon composition suitable for an automobile electric pedal, characterized in that: The raw materials for preparing the nylon composition include the following components in parts by weight: MXD6 with amino functional group 25-45 parts MXD6 modified with zinc oxide 20-40 parts Glass fiber 30-60 parts Modified silicon carbide 10-70 parts Modified nano kaolin 20-65 parts 3-8 parts of polytetrafluoroethylene Calcium stearate 2-10 parts 1-10 parts of negative ion powder.

2. The nylon composition suitable for an automobile electric pedal according to claim 1, characterized in that: The nylon composition further comprises 1 to 6 parts of auxiliary agents.

3. The nylon composition suitable for automobile electric pedal according to claim 1, characterized in that: The zinc oxide-modified MXD6 is zinc oxide with a carboxyl functional group prepared by acidifying zinc oxide with sulfuric acid or hydrochloric acid. The zinc oxide with a carboxyl functional group can react with the amino functional group in MXD6 to obtain zinc oxide-modified MXD6.

4. The nylon composition suitable for an automobile electric pedal according to claim 1, characterized in that: The modified silicon carbide is silicon carbide with hydroxyl functional groups prepared by hydroxylating silicon nitride. The modified silicon carbide with hydroxyl functional groups can react with the carboxyl functional groups in MXD6.

5. The nylon composition suitable for automobile electric pedal according to claim 1, characterized in that: The modified nano-kaolin is nano-kaolin with carboxyl functional groups prepared by acidifying nano-kaolin with sulfuric acid or hydrochloric acid, and can react with amino functional groups in MXD6.

6. The nylon composition suitable for automobile electric pedal according to claim 2, characterized in that: The auxiliary agent is one or a combination of anti-yellowing agent, lubricant, masterbatch, antioxidant, dispersant and compatibilizer.

7. A method for preparing a nylon composition suitable for an automotive electric pedal according to any one of claims 1 to 6, characterized in that: The following steps are involved: 1) adding 25-45 parts of MXD6 with amino functional group and 20-40 parts of MXD6 modified with zinc oxide into a high-speed mixer and mixing them evenly, then adding 20-65 parts of modified nano-kaolin and continuing to mix evenly, then adding 10-70 parts of modified silicon carbide, 30-60 parts of glass fiber, 3-8 parts of polytetrafluoroethylene, 2-10 parts of calcium stearate and 1-10 parts of negative ion powder and continuing to mix evenly to obtain a mixture; 2) feeding the mixed material into a twin-screw extruder for extrusion granulation to obtain the raw material for preparing the desired nylon composition; 3) The raw material of the nylon composition obtained in step 2) is molded by injection molding or blow molding.

8. The method for preparing a nylon composition suitable for an automobile electric pedal according to claim 7, characterized in that: In step 1), the stirring rate of the stirrer is 240-350 r / min, and the stirring time is 20-50 min.

9. The method for preparing a nylon composition suitable for an automobile electric pedal according to claim 7, characterized in that: In step 2), the extrusion temperature of the twin-screw extruder is controlled at 185-210°C.

10. The method for preparing a nylon composition suitable for an automobile electric pedal according to claim 7, characterized in that: In step 3), the injection temperature is 280-360°C, the injection pressure is 100-200 MPa, and the mold temperature is 55-150°C.