CN115710429A - Hydrolysis-resistant alcoholysis-resistant reinforced nylon material and preparation method thereof - Google Patents
Hydrolysis-resistant alcoholysis-resistant reinforced nylon material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a hydrolysis-resistant and alcoholysis-resistant reinforced nylon material and a preparation method thereof, wherein the hydrolysis-resistant and alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass: 50-70% of nylon resin; 30-50% of glass fiber reinforced material; 0.5 to 3 percent of hydrolysis resistance agent and 0.6 to 1.5 percent of antioxidant; 0.5-1% of silane coupling agent; 0.2 to 2 percent of lubricant; 0.3 to 1 percent of heat stabilizer; 0.2 to 0.5 percent of nucleating agent. According to the hydrolysis-resistant PA material provided by the invention, the high-performance hydrolysis-resistant reinforced nylon material is obtained by compounding the raw materials and adding the heat stabilizer and the hydrolysis-resistant agent, so that the material is continuously soaked in the 135 ℃ ethylene glycol antifreeze solution for more than 120 hours, and the tensile strength is kept above 70%, thereby avoiding the problems that the hydrolysis of the nylon material is accelerated in a high-temperature and humid environment, the material performance is reduced, and the danger is caused.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a hydrolysis-resistant alcoholysis-resistant reinforced nylon material and a preparation method thereof.
Background
Automobiles are the main way of energy consumption and environmental pollution, and the light weight and energy conservation of automobiles become important issues in the automobile industry at present. The selection of light engineering plastics for automobile structures and parts is an effective way for realizing light weight of automobiles, reducing energy consumption and reducing environmental pollution, but the light weight of automobiles is not simple weight reduction, and the factors such as product function, cost, quality and the like need to be considered at the same time. The radiator tank of the automobile engine is contacted with the cooling liquid for a long time, and the cooling liquid commonly used in the market at present mainly comprises ethylene glycol and water according to the weight ratio of 1:1 volume ratio. Therefore, materials for preparing the upper and lower cover members of the radiator tank are required. It must withstand the long-term corrosion of the coolant at high temperatures and also the requirement that the part not crack during assembly.
The common nylon material is difficult to meet the requirements, and the hydrolysis and alcoholysis resistance of the common nylon material needs to be improved. In addition, because the upper cover and the lower cover belong to large-sized parts, high fluidity is required in injection molding to ensure the smooth surface of the parts, and the most direct method for improving the fluidity in injection molding is to increase the injection molding temperature, so that the processing temperature resistance of the nylon material is higher to ensure that the performance of the nylon material cannot be lost in injection molding.
Polyamide (PA) is a widely used engineering plastic, and has excellent physical and mechanical properties due to its molecular structure and crystallization. However, due to the existence of amide polar groups, the application of polyamide is limited by high water absorption and poor hydrolysis resistance. Polyamide66 (PA 66 for short) is the variety with the largest yield, the largest variety and the widest application in five engineering plastics. The composite material is widely used for manufacturing parts of machinery, automobiles, chemical and electrical devices, such as gears, rollers, pulleys, roll shafts, impellers in pump bodies, fan blades, high-pressure sealing rings, valve seats, gaskets, bushings, various handles, support frames, inner layers of wire bags and the like.
Generally, the automobile water tank is made of PA material, and the temperature of liquid in the water tank is higher and can reach more than 100 ℃ in the long-term running process of an automobile, particularly in summer; the hydrolysis of the nylon material is accelerated in a high-temperature and humid environment, so that the performance of the material is reduced, and danger is easy to occur.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a hydrolysis-resistant alcoholysis-resistant reinforced nylon material for a radiator tank of an automobile engine and a preparation method thereof, wherein a hydrolysis-resistant PA material is adopted, and the hydrolysis resistance of the PA material is improved through compounding of raw materials, so that the PA material is continuously soaked in ethylene glycol antifreeze solution at 135 ℃ for more than 120 hours, and the tensile strength is kept at more than 70 percent, thereby solving the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a hydrolysis-resistant alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass:
50-70% of nylon resin; 30-50% of glass fiber reinforced material; 0.5 to 3 percent of hydrolysis resistance agent and 0.6 to 1.5 percent of antioxidant; 0.5-1% of silane coupling agent; 0.2 to 2 percent of lubricant; 0.3 to 1 percent of heat stabilizer; 0.2 to 0.5 percent of nucleating agent.
As a further scheme of the invention, the hydrolysis-resistant alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass: 60% of nylon resin; 40% of glass fiber reinforced material; 2.5 percent of hydrolysis resistance agent and 1.1 percent of antioxidant; 0.8 percent of silane coupling agent; 1.4% of a lubricant; 0.7 percent of heat stabilizer; 0.35 percent of nucleating agent.
As a further scheme of the invention, the nylon resin comprises one or more of PA66 No. 1, PA662 No. PA6I, PAR and PA1010.
As a further embodiment of the invention, PA661 has a viscosity of 2.4-2.5 PA66 and PA 2 has a viscosity of 3.0-3.2 PA66.
As a further scheme of the invention, the antioxidant comprises a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is any one of an antioxidant 1098, an antioxidant 3114 and an antioxidant Deox 1790; the auxiliary antioxidant is any one of antioxidant 168, antioxidant S-9228 and antioxidant Revonox 608.
As a further scheme of the invention, the lubricant is any one of PETS, TAF, SK-100, RD-500 and CAV102.
As a further scheme of the invention, the heat stabilizer is a copper salt stabilizer, and the copper salt stabilizer is any one of HK-306, SR-336, H3336 and SH3360.
As a further scheme of the invention, the coupling agent is any one of KH-550, KH-560 and KH-570.
In a further embodiment of the present invention, the hydrolysis resistance agent is any one of H3337, stabilizer 9000, and Sanwell AH81.
As a further scheme of the invention, the nucleating agent is any one of P22, CAV102, HK-145B, finner-122.
A preparation method of a reinforced nylon material based on hydrolysis resistance and alcoholysis resistance comprises the following steps:
1) Weighing nylon resin, a glass fiber reinforced material, a hydrolysis resistance agent, an antioxidant, a silane coupling agent, a lubricant, a heat stabilizer and a nucleating agent according to the mass percentage for later use;
2) Pretreating the weighed glass fiber reinforced material to obtain glass fiber, and compounding nylon resin;
3) Putting the compounded nylon resin in an oven, and drying to obtain a mixture A;
4) Measuring a silane coupling agent, dissolving the silane coupling agent in absolute ethyl alcohol to prepare a solution with the coupling agent mass fraction of 20%, uniformly spraying the solution on the glass fiber, standing and putting the glass fiber into an oven;
5) Putting the hydrolysis resistance agent, the lubricant, the heat stabilizer, the nucleating agent and the antioxidant into a stirrer according to a proportion and stirring to obtain an auxiliary agent bag;
6) Adding the mixture A into a high-speed mixer according to a preset weight fraction ratio for primary mixing, adding an auxiliary agent package for blending, uniformly mixing, adding into a double-screw extruder, adding the glass fiber treated in the step 4) into a natural exhaust port of the extruder, extruding, cooling and granulating.
As a further scheme of the invention, step 3) the compounded nylon resin is placed in an oven and dried for 3-5 hours at the temperature of 100-110 ℃ to obtain a mixture A.
As a further scheme of the invention, in the step 4), standing is carried out for 30 minutes, and then the mixture is placed into an oven and dried for 5min at 120 ℃.
As a further scheme of the invention, in the step 5), the hydrolysis resistance agent, the lubricant, the heat stabilizer, the nucleating agent and the antioxidant are proportionally put into a stirrer to be stirred for 2min.
As a further scheme of the invention, in the step 6), in the extrusion process, the rotating speed of the main machine is 300-400r/min, the feeding rotating speed is 10-20r/min, the double-screw extruder is provided with 10 temperature zones in total, the temperature is 230-250 ℃, 265-285 ℃ respectively 265-285 deg.C, 270-290 deg.C.
Compared with the prior art, the invention has the beneficial effects that:
according to the hydrolysis-resistant PA material provided by the invention, the high-performance hydrolysis-resistant reinforced nylon material is obtained by compounding the raw materials and adding the heat stabilizer and the hydrolysis-resistant agent, so that the material is continuously soaked in the 135 ℃ ethylene glycol antifreeze solution for more than 120 hours, and the tensile strength is kept above 70%, thereby avoiding the problems that the hydrolysis of the nylon material is accelerated in a high-temperature and humid environment, the material performance is reduced, and the danger is caused.
To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a flow chart of the preparation of a hydrolysis-resistant alcoholysis-resistant reinforced nylon material according to an embodiment of the invention.
Detailed Description
The technical means of the present invention will be described in further detail with reference to the embodiments.
Example 1
A hydrolysis-resistant alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass:
65% of nylon resin; 30% of glass fiber reinforced material; 3.1 percent of hydrolysis resistance agent and 0.3 percent of antioxidant; 0.5 percent of silane coupling agent; 0.6% of a lubricant; 0.3 percent of heat stabilizer; 0.2 percent of nucleating agent.
In this embodiment, the nylon resin includes PA66 No. 1, PA66 No. 2, and PA1010. Wherein the nylon resin comprises the following raw materials in percentage by mass: PA66 No. 1 25%; PA66 No. 25%; PA 1010% by weight.
In this embodiment, the antioxidant includes a primary antioxidant and a secondary antioxidant, and the primary antioxidant is antioxidant 1098; the auxiliary antioxidant is antioxidant 168.
In this example, the lubricant is PETS.
In this example, the thermal stabilizer is a copper salt stabilizer, which is HK-306.
In this example, the coupling agent is KH-550.
In this example, the hydrolysis resistance agent is H3337.
In this example, the nucleating agent is P22.
Referring to fig. 1, a method for preparing a reinforced nylon material based on hydrolysis resistance and alcoholysis resistance comprises the following steps:
1) Weighing nylon resin, a glass fiber reinforced material, a hydrolysis resistance agent, an antioxidant, a silane coupling agent, a lubricant, a heat stabilizer and a nucleating agent according to the mass percentage for later use;
2) Pretreating the weighed glass fiber reinforced material to obtain glass fiber, and compounding nylon resin;
3) Putting the compounded nylon resin into an oven, and drying for 5 hours at the temperature of 120 ℃ to obtain a mixture A;
4) Measuring a silane coupling agent, dissolving the silane coupling agent in absolute ethyl alcohol to prepare a solution with the coupling agent mass fraction of 20%, uniformly spraying the solution on the glass fiber, standing for 30 minutes, putting the solution into an oven, and drying for 5min at 120 ℃;
5) Putting the hydrolysis resistance agent, the lubricant, the heat stabilizer, the nucleating agent and the antioxidant into a stirrer according to the proportion, and stirring for 2min to obtain an auxiliary agent bag;
6) Adding the mixture A into a high-speed mixer according to a preset weight fraction ratio for primary mixing, adding an auxiliary agent package for blending, uniformly mixing, adding into a double-screw extruder, adding the glass fiber treated in the step 4) into a natural exhaust port of the extruder, extruding, cooling and granulating.
Wherein, in the step 6), the rotating speed of the main machine is 300r/min, the feeding rotating speed is 20r/min, 10 temperature zones are arranged in the double-screw extruder in total, and the temperature is respectively 230-250 ℃, 265-285 ℃, 270-290 ℃.
Example 2
A hydrolysis-resistant alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass:
67% of nylon resin; 27% of glass fiber reinforced material; 3.5 percent of hydrolysis resistance agent and 0.2 percent of antioxidant; 0.5 percent of silane coupling agent; 0.3% of a lubricant; 0.3 percent of heat stabilizer; 0.2 percent of nucleating agent.
In the present embodiment, the nylon resin includes PA66 No. 1, PA66 No. 2, PA6I, PA. Wherein the nylon resin comprises the following raw materials in percentage by mass: PA66 No. 1 20%; PA66 No. 2 22%; 15% of PA 6I; PA 1010% by weight.
In this embodiment, the antioxidant includes a primary antioxidant and a secondary antioxidant, and the primary antioxidant is antioxidant 3114; the auxiliary antioxidant is antioxidant S-9228.
In this embodiment, the lubricant is SK-100.
In this example, the thermal stabilizer is a copper salt stabilizer, and the copper salt stabilizer is SR-336.
In this example, the coupling agent is KH-560.
In this example, the hydrolysis resistance agent is stabilizer 9000.
In this embodiment, the nucleating agent is CAV102.
A preparation method of a reinforced nylon material based on hydrolysis resistance and alcoholysis resistance comprises the following steps:
1) Weighing nylon resin, a glass fiber reinforced material, a hydrolysis resistance agent, an antioxidant, a silane coupling agent, a lubricant, a heat stabilizer and a nucleating agent according to the mass percentage for later use;
2) Pretreating the weighed glass fiber reinforced material to obtain glass fiber, and compounding nylon resin;
3) Putting the compounded nylon resin into a drying oven, and drying for 3.5 hours at 105 ℃ to obtain a mixture A;
4) Measuring a silane coupling agent, dissolving the silane coupling agent in absolute ethyl alcohol to prepare a solution with the coupling agent mass fraction of 20%, uniformly spraying the solution on the glass fiber, standing for 30 minutes, putting the solution into an oven, and drying for 5min at 120 ℃;
5) Putting a hydrolysis resistant agent, a lubricant, a heat stabilizer, a nucleating agent and an antioxidant into a stirrer according to a ratio, and stirring for 2min to obtain an auxiliary agent bag;
6) Adding the mixture A into a high-speed mixer according to a preset weight percentage ratio for primary mixing, adding an auxiliary agent bag for blending, uniformly mixing, adding into a double-screw extruder, adding the glass fiber treated in the step 4) into a natural exhaust port of the extruder, extruding, cooling and granulating.
Wherein, in the step 6), the rotating speed of the main machine is 350r/min, the feeding rotating speed is 15r/min, 10 temperature zones are arranged in the double-screw extruder in total, and the temperature is respectively 230-250 ℃, 265-285 ℃, 270-290 ℃.
Example 3
A hydrolysis-resistant alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass:
65% of nylon resin; 30% of glass fiber reinforced material; 3.5 percent of hydrolysis resistance agent and 0.2 percent of antioxidant; 0.5 percent of silane coupling agent; 0.3% of a lubricant; 0.3 percent of heat stabilizer; 0.2 percent of nucleating agent.
In the present embodiment, the nylon resin includes PA66 No. 1, PA66 No. 2, PA6I, PA. Wherein the nylon resin comprises the following raw materials in percentage by mass: PA66 No. 1 20%; PA66 No. 25%; 10% of PA 6I; PA 1010% by weight.
In this embodiment, the antioxidant includes a primary antioxidant and a secondary antioxidant, and the primary antioxidant is antioxidant Deox 1790; the auxiliary antioxidant is antioxidant Revonox 608.
In this embodiment, the lubricant is TAF.
In this example, the thermal stabilizer is a copper salt stabilizer, and the copper salt stabilizer is H3336.
In this example, the coupling agent is KH-570.
In this example, the hydrolysis resistance agent was Sanwell AH81.
In this embodiment, the nucleating agent is HK-145B.
A preparation method of a reinforced nylon material based on hydrolysis resistance and alcoholysis resistance comprises the following steps:
1) Weighing nylon resin, a glass fiber reinforced material, a hydrolysis resistance agent, an antioxidant, a silane coupling agent, a lubricant, a heat stabilizer and a nucleating agent according to mass percentage for later use;
2) Pretreating the weighed glass fiber reinforced material to obtain glass fiber, and compounding nylon resin;
3) Putting the compounded nylon resin into an oven, and drying for 5 hours at the temperature of 100 ℃ to obtain a mixture A;
4) Measuring a silane coupling agent, dissolving the silane coupling agent in absolute ethyl alcohol to prepare a solution with the coupling agent mass fraction of 20%, uniformly spraying the solution on the glass fiber, standing for 30 minutes, putting the solution into an oven, and drying for 5min at 120 ℃;
5) Putting the hydrolysis resistance agent, the lubricant, the heat stabilizer, the nucleating agent and the antioxidant into a stirrer according to the proportion, and stirring for 2min to obtain an auxiliary agent bag;
6) Adding the mixture A into a high-speed mixer according to a preset weight fraction ratio for primary mixing, adding an auxiliary agent package for blending, uniformly mixing, adding into a double-screw extruder, adding the glass fiber treated in the step 4) into a natural exhaust port of the extruder, extruding, cooling and granulating.
Wherein, in the step 6), the rotating speed of the main machine is 400r/min, the feeding rotating speed is 10r/min, the double-screw extruder is provided with 10 temperature zones in total, the temperature is 230-250 ℃, 265-285 ℃ respectively 265-285 deg.C, 270-290 deg.C.
Example 4
A hydrolysis-resistant alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass:
60% of nylon resin; 35% of glass fiber reinforced material; 3.5 percent of hydrolysis resistance agent and 0.2 percent of antioxidant; 0.5 percent of silane coupling agent; 0.3% of a lubricant; 0.3 percent of heat stabilizer; 0.2 percent of nucleating agent.
In the present embodiment, the nylon resin includes PA66 No. 1, PA66 No. 2, PAR, PA1010. Wherein the nylon resin comprises the following raw materials in percentage by mass: PA66 No. 1 20%; PA66 No. 20%; PAR 10%; PA 1010% by weight.
In this embodiment, the antioxidant includes a primary antioxidant and a secondary antioxidant, and the primary antioxidant is antioxidant Deox 1790; the auxiliary antioxidant is antioxidant Revonox 608.
In this example, the lubricant is RD-500.
In this example, the thermal stabilizer was a copper salt stabilizer, which was SH3360.
In this example, the coupling agent is KH-570.
In this example, the hydrolysis resistance agent is stabilizer 9000.
In this example, the nucleating agent is Finner-122.
A preparation method of a reinforced nylon material based on hydrolysis resistance and alcoholysis resistance comprises the following steps:
1) Weighing nylon resin, a glass fiber reinforced material, a hydrolysis resistance agent, an antioxidant, a silane coupling agent, a lubricant, a heat stabilizer and a nucleating agent according to the mass percentage for later use;
2) Pretreating the weighed glass fiber reinforced material to obtain glass fiber, and compounding nylon resin;
3) Putting the compounded nylon resin into an oven, and drying for 3 hours at the temperature of 110 ℃ to obtain a mixture A;
4) Measuring a silane coupling agent, dissolving the silane coupling agent in absolute ethyl alcohol to prepare a solution with the coupling agent mass fraction of 20%, uniformly spraying the solution on the glass fiber, standing for 30 minutes, putting the solution into an oven, and drying for 5min at 120 ℃;
5) Putting the hydrolysis resistance agent, the lubricant, the heat stabilizer, the nucleating agent and the antioxidant into a stirrer according to the proportion, and stirring for 2min to obtain an auxiliary agent bag;
6) Adding the mixture A into a high-speed mixer according to a preset weight fraction ratio for primary mixing, adding an auxiliary agent package for blending, uniformly mixing, adding into a double-screw extruder, adding the glass fiber treated in the step 4) into a natural exhaust port of the extruder, extruding, cooling and granulating.
Wherein, in the step 6), the rotating speed of the main machine is 370r/min, the feeding rotating speed is 16r/min, 10 temperature zones are arranged in the double-screw extruder in total, and the temperature is respectively 230-250 ℃, 265-285 ℃, 270-290 ℃.
Example 5
A hydrolysis-resistant alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass:
62% of nylon resin; 33% of glass fiber reinforced material; 3.5 percent of hydrolysis resistance agent and 0.2 percent of antioxidant; 0.5 percent of silane coupling agent; 0.3% of a lubricant; 0.3 percent of heat stabilizer; 0.2 percent of nucleating agent.
In this embodiment, the nylon resin includes PA66 No. 1, PA66 No. 2, PA6I, PAR, PA1010. Wherein the nylon resin comprises the following raw materials in percentage by mass: PA66 No. 1 20%; PA66 No. 20%; PA6I 5%; PAR 7%; PA 1010% by weight.
In this embodiment, the antioxidant includes a primary antioxidant and a secondary antioxidant, and the primary antioxidant is antioxidant 1098; the auxiliary antioxidant is antioxidant 168 and antioxidant S-9228.
In this embodiment, the lubricant is CAV102.
In this example, the thermal stabilizer was a copper salt stabilizer, which was SH3360.
In this example, the coupling agent is KH-570.
In this example, the hydrolysis resistance agent is H3337.
In this example, the nucleating agent is Finner-122.
A preparation method of a reinforced nylon material based on hydrolysis resistance and alcoholysis resistance comprises the following steps:
1) Weighing nylon resin, a glass fiber reinforced material, a hydrolysis resistance agent, an antioxidant, a silane coupling agent, a lubricant, a heat stabilizer and a nucleating agent according to the mass percentage for later use;
2) Pretreating the weighed glass fiber reinforced material to obtain glass fiber, and compounding nylon resin;
3) Putting the compounded nylon resin into a drying oven, and drying for 3.5 hours at the temperature of 110 ℃ to obtain a mixture A;
4) Measuring a silane coupling agent, dissolving the silane coupling agent in absolute ethyl alcohol to prepare a solution with the coupling agent mass fraction of 20%, uniformly spraying the solution on the glass fiber, standing for 30 minutes, putting the solution into an oven, and drying for 5min at 120 ℃;
5) Putting the hydrolysis resistance agent, the lubricant, the heat stabilizer, the nucleating agent and the antioxidant into a stirrer according to the proportion, and stirring for 2min to obtain an auxiliary agent bag;
6) Adding the mixture A into a high-speed mixer according to a preset weight fraction ratio for primary mixing, adding an auxiliary agent package for blending, uniformly mixing, adding into a double-screw extruder, adding the glass fiber treated in the step 4) into a natural exhaust port of the extruder, extruding, cooling and granulating.
Wherein, in the step 6), the rotating speed of the main machine is 400r/min, the feeding rotating speed is 10r/min, 10 temperature zones are arranged in the double-screw extruder in total, and the temperature is respectively 230-250 ℃, 265-285 ℃, 270-290 ℃.
Comparative example 1
A hydrolysis-resistant alcoholysis-resistant reinforced nylon material comprises the following raw materials in percentage by mass:
70% of nylon resin; 29.3 percent of glass fiber reinforced material; 0.2 percent of antioxidant; 0.5 percent of lubricant. Wherein, the hydrolysis-resistant and alcoholysis-resistant reinforced nylon material does not contain a glass fiber reinforced material, a hydrolysis-resistant agent, a nucleating agent, a heat stabilizer and a silane coupling agent.
In the present embodiment, the nylon resin includes PA66 No. 1 and PA66 No. 2. Wherein the nylon resin comprises the following raw materials in percentage by mass: PA66 No. 1 20%; PA66 No. 2 50%.
The procedure was the same as in example 1.
Effect verification:
the hydrolysis and alcoholysis resistant reinforced nylon materials prepared in examples 1 to 5 and the hydrolysis and alcoholysis resistant reinforced nylon material prepared in comparative example 1 were tested for flexural strength, flexural strength and izod notch, and for tensile strength and tensile strength retention after 120 hours of continuous immersion in 135 ℃ ethylene glycol antifreeze, according to the following test standards: tensile strength ASTM/D638, flexural strength ASTM/D790, notched Izod impact strength ASTM/D256, the test results are as follows.
Table 1 table of tensile strength test results
TABLE 2 test results table
Ethylene glycol: water =1:1 a mixed solution was prepared, and the molded sample was continuously immersed in an aqueous ethylene glycol solution at 135 ℃ for 120 hours, and then tested for tensile properties, as described above.
Relevant test criteria for tensile strength are: american Standard tensile Strength ASTM/D638, flexural Strength ASTM/D790, notched Izod impact Strength ASTM/D256.
The results show that the hydrolysis resistance and the thermal stabilizer are adopted to improve the hydrolysis and alcoholysis resistance of the glass fiber reinforced nylon 66 composite material, the mechanical properties of the material are improved by compounding the high-temperature nylon PA6I and the long-chain nylon PA1010 with two types of PA66 with different viscosities, the selected PAR has excellent heat resistance, the high-temperature nylon has higher glass transition temperature and high fluidity, can quickly flow to the surface of a workpiece and then quickly solidify to achieve the effect of a protective layer, namely, a layer of armor is formed on the surface of the workpiece so as to improve the hydrolysis resistance of the workpiece, the interface modification effect of the glass fiber is improved by the treatment of the coupling agent, the compatibility among materials is improved, and the good mechanical properties of the glass fiber are ensured while the good hydrolysis and alcoholysis resistance are achieved. The invention selects the coupling agent as the silane coupling agent, the silicon oxygen radical of the silane coupling agent can lead the silicon atom to generate chemical reaction through hydrolysis, and simultaneously, the silane coupling agent can lead the nylon matrix to be combined with the glass fiber through chemical bonds to improve the shearing strength of the interface. The test condition of the invention is that the continuous soaking time in the 135 ℃ glycol antifreeze solution is more than 120 hours, and the retention rate of the tensile strength is more than 70%.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The hydrolysis-resistant alcoholysis-resistant reinforced nylon material is characterized by comprising the following raw materials in percentage by mass:
50-70% of nylon resin; 30-50% of glass fiber reinforced material; 0.5 to 3 percent of hydrolysis resistance agent and 0.6 to 1.5 percent of antioxidant; 0.5-1% of silane coupling agent; 0.2 to 2 percent of lubricant; 0.3 to 1 percent of heat stabilizer; 0.2 to 0.5 percent of nucleating agent.
2. The reinforced nylon material with hydrolysis resistance and alcoholysis resistance as recited in claim 1, wherein the nylon resin is 60%; 40% of glass fiber reinforced material; 2.5 percent of hydrolysis resistance agent and 1.1 percent of antioxidant; 0.8 percent of silane coupling agent; 1.4% of a lubricant; 0.7 percent of heat stabilizer; 0.35 percent of nucleating agent.
3. The reinforced nylon material with hydrolysis and alcoholysis resistance as claimed in claim 1 or 2, wherein the nylon resin comprises one or more of PA66 No. 1, PA66 No. 2, PA6I, PAR, PA1010.
4. The reinforced nylon material with hydrolysis and alcoholysis resistance as claimed in claim 1 or 2, wherein the antioxidant comprises a primary antioxidant and a secondary antioxidant, the primary antioxidant is any one of antioxidant 1098, antioxidant 3114 and antioxidant Deox 1790; the auxiliary antioxidant is any one of antioxidant 168, antioxidant S-9228 and antioxidant Revonox 608.
5. The hydrolysis and alcoholysis resistant reinforced nylon material of claim 1 or 2, wherein the lubricant is any one of PETS, TAF, SK-100, RD-500, CAV102.
6. The reinforced nylon material with hydrolysis and alcoholysis resistance as recited in claim 1 or 2, wherein the thermal stabilizer is a copper salt stabilizer, and the copper salt stabilizer is any one of HK-306, SR-336, H3336 and SH3360.
7. The reinforced nylon material with hydrolysis and alcoholysis resistance as recited in claim 1 or 2, wherein the coupling agent is any one of KH-550, KH-560 and KH-570.
8. The reinforced nylon material with hydrolysis and alcoholysis resistance as recited in claim 1 or 2, wherein the nucleating agent is any one of P22, CAV102, HK-145B, finner-122.
9. A method for preparing the reinforced nylon material with hydrolysis resistance and alcoholysis resistance as defined in any one of claims 1 to 8, which comprises the following steps:
1) Weighing nylon resin, a glass fiber reinforced material, a hydrolysis resistance agent, an antioxidant, a silane coupling agent, a lubricant, a heat stabilizer and a nucleating agent according to mass percentage for later use;
2) Pretreating the weighed glass fiber reinforced material to obtain glass fiber, and compounding nylon resin;
3) Putting the compounded nylon resin in an oven, and drying to obtain a mixture A;
4) Measuring a silane coupling agent, dissolving the silane coupling agent in absolute ethyl alcohol to prepare a solution with the coupling agent mass fraction of 20%, uniformly spraying the solution on the glass fiber, standing and putting the glass fiber into an oven;
5) Putting the hydrolysis resistance agent, the lubricant, the heat stabilizer, the nucleating agent and the antioxidant into a stirrer according to a proportion and stirring to obtain an auxiliary agent bag;
6) Adding the mixture A into a high-speed mixer according to a preset weight fraction ratio for primary mixing, adding an auxiliary agent package for blending, uniformly mixing, adding into a double-screw extruder, adding the glass fiber treated in the step 4) into a natural exhaust port of the extruder, extruding, cooling and granulating.
10. The method for preparing the hydrolysis-resistant and alcoholysis-resistant reinforced nylon material as recited in claim 8, wherein in step 6), the rotation speed of the main machine is 300-400r/min, the rotation speed of the feeding is 10-20r/min, and a total of 10 temperature zones are provided for the twin-screw extruder, wherein the temperatures of the zones are 230-250 ℃, 265-285 ℃, 270-290 ℃ respectively.
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