Preparation method of high-strength modified nylon 66 plastic for automobiles

Abstract

The invention discloses a preparation method of high-strength modified nylon 66 plastic for an automobile, and relates to the technical field of nylon plastics, the preparation method of the high-strength modified nylon 66 plastic for the automobile comprises the following steps: a, putting nylon 66 plastic particles, calcium carbonate powder, polyethylene particles and glass fibers into a stirring device for heating and melting; b, adding a neutralizer and water-absorbing particles into the stirring device; c, adding a sterilizing agent, an antioxidant and an ultraviolet light absorber into the stirring device; and d, adding the flexibilizer, the plasticizer and the nucleating agent into the stirring device. The strength of the nylon 66 can be improved by adding the glass fiber and the calcium carbonate powder, and the water absorption capacity can be remarkably reduced by blending the nylon 66 and the polyethylene, so that the water absorption of the nylon 66 in the product is reduced, and the influence of substances in water caused by water absorption on the performance of the nylon 66 is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of nylon plastics, in particular to a method for preparing high-strength modified nylon 66 plastic for automobiles. Background Art

[0002] Nylon 66 plastic is often used in automobiles. In automobile interiors, nylon 66 plays an important role. Nylon 66 is water-absorbent, and its own performance will be affected after absorbing water. Therefore, it is necessary to improve the preparation method of nylon 66 and reduce the water absorption capacity of nylon 66.

[0003] The defects of the existing nylon 66 plastic preparation method are:

[0004] 1. The prior art JPS5388093A discloses the continuous production of nylon 66. This technology does not have the function of reducing the water absorption capacity of nylon 66 products. After nylon 66 absorbs water, the substances in the water and the water will reduce the performance of nylon 66. Therefore, a method for preparing high-strength modified nylon 66 plastic for automobiles that can reduce water absorption capacity is needed to solve this problem.

[0005] 2. The prior art JPH05230208A discloses the continuous production of nylon 66. This technology does not have the function of reducing the corrosion ability of alkaline substances on nylon 66. Nylon 66 is easily damaged and discolored when exposed to alkaline substances, affecting the appearance of nylon 66 in automobile interiors. Therefore, a method for preparing high-strength modified nylon 66 plastic for automobiles that can reduce the probability of nylon 66 discoloration is needed to solve this problem.

[0006] 3. The prior art JPH059292A discloses JPH059292A. After nylon 66 has absorbed water, the water in the nylon 66 easily damages the nylon 66, and the water content in the nylon 66 cannot be reduced. Therefore, a method for preparing high-strength modified nylon 66 plastic for automobiles that can reduce the water content in the nylon 66 that has absorbed water is needed to solve this problem.

[0007] 4. Prior art CN117843947A discloses a one-step synthesis method for nylon 66 and the nylon 66 prepared therefrom. This technology does not have bactericidal ability. When bacteria invade nylon 66, they are likely to corrode the additives in nylon 66. Therefore, a method for preparing high-strength modified nylon 66 plastic for automobiles with bactericidal ability is needed to solve this problem. Summary of the Invention

[0008] One purpose of the present application is to provide a method for preparing high-strength modified nylon 66 plastic for automobiles, which can solve the technical problems raised in the prior art.

[0009] To achieve the above object, the present invention provides the following technical solution: a method for preparing high-strength modified nylon 66 plastic for automobiles, the method comprising the following steps:

[0010] a: Place nylon 66 plastic particles, calcium carbonate powder, polyethylene particles and glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes;

[0011] b: Then add the neutralizer and water-absorbing particles into the stirring device and continue stirring for 10 minutes;

[0012] c. Then, the fungicide, antioxidant and ultraviolet absorber are added into the stirring device and stirring is continued for 10 minutes;

[0013] d: Then add the toughening agent, plasticizer and nucleating agent into the stirring device and continue stirring for 10 minutes.

[0014] Preferably, the high-strength modified nylon 66 plastic for automobiles comprises, by weight, 60 to 80 parts of nylon 66 plastic particles, 10 to 15 parts of glass fiber, 10 to 15 parts of calcium carbonate powder, 10 to 20 parts of polyethylene particles, 10 to 15 parts of neutralizer powder, 10 to 15 parts of water-absorbing particles, 5 to 10 parts of fungicide, 2 to 5 parts of antioxidant, 5 to 10 parts of ultraviolet absorber, 5 to 10 parts of toughening agent, 5 to 10 parts of plasticizer and 5 to 10 parts of nucleating agent.

[0015] Preferably, the neutralizing agent is calcium chloride powder.

[0016] Preferably, the water-absorbing particles are silica gel particles.

[0017] Preferably, the bactericide is a silver ion bactericide.

[0018] Preferably, the antioxidant is one of 2,6-di-tert-butylphenol, phosphites and thiopropionates.

[0019] Preferably, the ultraviolet absorber is one of phenyl o-hydroxybenzoate, 2,4-dihydroxybenzophenone and resorcinol monobenzoate.

[0020] Preferably, the toughening agent is EPDM rubber.

[0021] Preferably, the plasticizer is one of diphenylphenol, octylcresol, N-methylbenzenesulfonyl, N-butylbenzenesulfonamide, and P-methylbenzenesulfonamide.

[0022] Preferably, the nucleating agent is one or more of talc and mica.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention can improve the strength of nylon 66 by adding glass fiber and calcium carbonate powder, and blending nylon 66 and polyethylene can significantly reduce the water absorption capacity, thereby reducing the water absorption of nylon 66 in the product, and further reducing the impact of water substances caused by water absorption on the performance of nylon 66.

[0025] 2. The present invention can neutralize alkaline substances when contacting alkaline liquid by adding calcium chloride powder, reducing the erosion of alkaline substances on the product, thereby reducing the discoloration of nylon 66 caused by alkaline substances and maintaining the natural and beautiful color of the product.

[0026] 3. The present invention can absorb the liquid that invades the product by adding silica gel, reduce the alkaline substances in the nylon 66 component, thereby further preventing the discoloration of nylon 66, making the anti-discoloration performance of nylon 66 better, and reducing the impact of substances in the liquid on other components in the product.

[0027] 4. The present invention can kill bacteria that invade the product by adding a bactericide, thereby preventing bacteria from corroding the internal components of the product and preventing the components from becoming ineffective, thereby extending the life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flow chart of the preparation method of the present invention. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1 A method for preparing high-strength modified nylon 66 plastic for automobiles, comprising the following steps:

[0031] a: Place nylon 66 plastic particles, calcium carbonate powder, polyethylene particles and glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes;

[0032] b: Then add the neutralizer and water-absorbing particles into the stirring device and continue stirring for 10 minutes;

[0033] c. Then, the fungicide, antioxidant and ultraviolet absorber are added into the stirring device and stirring is continued for 10 minutes;

[0034] d: Then add the toughening agent, plasticizer and nucleating agent into the stirring device and continue stirring for 10 minutes.

[0035] The high-strength modified nylon 66 plastic for automobiles includes, by weight, 60 to 80 parts of nylon 66 plastic particles, 10 to 15 parts of glass fiber, 10 to 15 parts of calcium carbonate powder, 10 to 20 parts of polyethylene particles, 10 to 15 parts of neutralizer powder, 10 to 15 parts of water-absorbing particles, 5 to 10 parts of fungicide, 2 to 5 parts of antioxidant, 5 to 10 parts of ultraviolet absorber, 5 to 10 parts of toughening agent, 5 to 10 parts of plasticizer and 5 to 10 parts of nucleating agent.

[0036] The neutralizing agent is calcium chloride powder.

[0037] The water-absorbing particles are silica gel particles.

[0038] The fungicide is a silver ion fungicide.

[0039] The antioxidant is one of 2,6-di-tert-butylphenol, phosphite and thiopropionate.

[0040] The ultraviolet absorber is one of phenyl o-hydroxybenzoate, 2,4-dihydroxybenzophenone and resorcinol monobenzoate.

[0041] The toughening agent is EPDM rubber.

[0042] The plasticizer is one of diphenylphenol, octylcresol, N-methylbenzenesulfonyl, N-butylbenzenesulfonamide and P-methylbenzenesulfonamide.

[0043] The nucleating agent is one or more of talc and mica.

[0044] Example 1:

[0045] 1. Place 60 parts of nylon 66 plastic particles, 12 parts of calcium carbonate powder, 15 parts of polyethylene particles and 12 parts of glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes.

[0046] 2. Then add 12 parts of neutralizing calcium chloride powder and 12 parts of water-absorbing silica gel particles into the stirring device and continue stirring for 10 minutes;

[0047] 3. Then, 5 parts of silver ion fungicide, 3 parts of 2,6-di-tert-butylphenol, an antioxidant, and 7 parts of phenyl o-hydroxybenzoate, an ultraviolet absorber, were added into the stirring device and the stirring was continued for 10 minutes.

[0048] Fourth: Then add 7 parts of toughening agent EPDM rubber, 7 parts of plasticizer diphenylphenol and 7 parts of nucleating agent talc into the stirring device and continue stirring for 10 minutes.

[0049] Example 2:

[0050] 1. Place 60 parts of nylon 66 plastic particles, 12 parts of calcium carbonate powder and 15 parts of polyethylene particles into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes.

[0051] 2. Then add 12 parts of neutralizing calcium chloride powder and 12 parts of water-absorbing silica gel particles into the stirring device and continue stirring for 10 minutes;

[0052] 3. Then, 5 parts of silver ion fungicide, 3 parts of 2,6-di-tert-butylphenol, an antioxidant, and 7 parts of phenyl o-hydroxybenzoate, an ultraviolet absorber, were added into the stirring device and the stirring was continued for 10 minutes.

[0053] Fourth: Then add 7 parts of toughening agent EPDM rubber, 7 parts of plasticizer diphenylphenol and 7 parts of nucleating agent talc into the stirring device and continue stirring for 10 minutes.

[0054] Example 3:

[0055] 1. Place 60 parts of nylon 66 plastic particles, 15 parts of polyethylene particles and 12 parts of glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes.

[0056] 2. Then add 12 parts of neutralizing calcium chloride powder and 12 parts of water-absorbing silica gel particles into the stirring device and continue stirring for 10 minutes;

[0057] 3. Then, 5 parts of silver ion fungicide, 3 parts of 2,6-di-tert-butylphenol, an antioxidant, and 7 parts of phenyl o-hydroxybenzoate, an ultraviolet absorber, were added into the stirring device and the stirring was continued for 10 minutes.

[0058] Fourth: Then add 7 parts of toughening agent EPDM rubber, 7 parts of plasticizer diphenylphenol and 7 parts of nucleating agent talc into the stirring device and continue stirring for 10 minutes.

[0059] Example 4:

[0060] 1. Place 60 parts of nylon 66 plastic particles, 12 parts of calcium carbonate powder, 15 parts of polyethylene particles and 12 parts of glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes.

[0061] 2. Then add 12 parts of water-absorbing silica gel particles into the stirring device and continue stirring for 10 minutes;

[0062] 3. Then, 5 parts of silver ion fungicide, 3 parts of 2,6-di-tert-butylphenol, an antioxidant, and 7 parts of phenyl o-hydroxybenzoate, an ultraviolet absorber, were added into the stirring device and the stirring was continued for 10 minutes.

[0063] Fourth: Then add 7 parts of toughening agent EPDM rubber, 7 parts of plasticizer diphenylphenol and 7 parts of nucleating agent talc into the stirring device and continue stirring for 10 minutes.

[0064] Embodiment 5:

[0065] 1. Place 60 parts of nylon 66 plastic particles, 12 parts of calcium carbonate powder, 15 parts of polyethylene particles and 12 parts of glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes.

[0066] 2. Then add 12 parts of neutralizing calcium chloride powder into the stirring device and continue stirring for 10 minutes;

[0067] 3. Then, 5 parts of silver ion fungicide, 3 parts of 2,6-di-tert-butylphenol, an antioxidant, and 7 parts of phenyl o-hydroxybenzoate, an ultraviolet absorber, were added into the stirring device and the stirring was continued for 10 minutes.

[0068] Fourth: Then add 7 parts of toughening agent EPDM rubber, 7 parts of plasticizer diphenylphenol and 7 parts of nucleating agent talc into the stirring device and continue stirring for 10 minutes.

[0069] Example 6:

[0070] 1. Place 60 parts of nylon 66 plastic particles, 12 parts of calcium carbonate powder, 15 parts of polyethylene particles and 12 parts of glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes.

[0071] 2. Then add 12 parts of neutralizing calcium chloride powder and 12 parts of water-absorbing silica gel particles into the stirring device and continue stirring for 10 minutes;

[0072] 3. Then, 3 parts of antioxidant 2,6-di-tert-butylphenol and 7 parts of ultraviolet absorber phenyl o-hydroxybenzoate were added into the stirring device and the stirring was continued for 10 minutes.

[0073] Fourth: Then add 7 parts of toughening agent EPDM rubber, 7 parts of plasticizer diphenylphenol and 7 parts of nucleating agent talc into the stirring device and continue stirring for 10 minutes.

[0074] Embodiment seven:

[0075] 1. Place 60 parts of nylon 66 plastic particles, 12 parts of calcium carbonate powder, 15 parts of polyethylene particles and 12 parts of glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes.

[0076] 2. Then add 12 parts of neutralizing calcium chloride powder and 12 parts of water-absorbing silica gel particles into the stirring device and continue stirring for 10 minutes;

[0077] 3. Then add 5 parts of silver ion fungicide into the stirring device and continue stirring for 10 minutes;

[0078] Fourth: Then add 7 parts of toughening agent EPDM rubber, 7 parts of plasticizer diphenylphenol and 7 parts of nucleating agent talc into the stirring device and continue stirring for 10 minutes.

[0079] Embodiment 8:

[0080] 1. Place 60 parts of nylon 66 plastic particles, 12 parts of calcium carbonate powder and 12 parts of glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes.

[0081] 2. Then add 12 parts of neutralizing calcium chloride powder and 12 parts of water-absorbing silica gel particles into the stirring device and continue stirring for 10 minutes;

[0082] 3. Then, 5 parts of silver ion fungicide, 3 parts of 2,6-di-tert-butylphenol, an antioxidant, and 7 parts of phenyl o-hydroxybenzoate, an ultraviolet absorber, were added into the stirring device and the stirring was continued for 10 minutes.

[0083] Fourth: Then add 7 parts of toughening agent EPDM rubber, 7 parts of plasticizer diphenylphenol and 7 parts of nucleating agent talc into the stirring device and continue stirring for 10 minutes.

[0084] Performance testing:

[0085] 1. Water absorption test: The product of each embodiment was placed in a humid environment and left to stand for 24 hours, and then the weight change of each embodiment was measured;

[0086] 2. Color change test: Apply an alkaline solution with a pH of 9 to each example product, and then observe whether the color of each example product changes after 24 hours.

[0087] Test data of each embodiment under the same test conditions

[0088] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Weight change (%) +0.8 +1.3 +0.1 +0.9 +0.8 +0.8 +0.8 +1.4 Does the color change? no no no yes no no no no

[0089] Experimental data show that the present invention can significantly reduce water absorption capacity by blending nylon 66 and polyethylene, and can neutralize alkaline substances when in contact with alkaline liquids by adding calcium chloride powder, thereby reducing the erosion of alkaline substances on the product, and can absorb the liquid invading the product by adding silica gel, thereby reducing the alkaline substances in the nylon 66 component and avoiding discoloration of nylon 66.

[0090] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be embraced herein, and any reference signs in the claims should not be construed as limiting the rights involved.

Claims

1. A method for preparing high-strength modified nylon 66 plastic for automobiles, characterized by: The method for preparing the high-strength modified nylon 66 plastic for automobiles comprises the following steps: a: Place nylon 66 plastic particles, calcium carbonate powder, polyethylene particles and glass fiber into a stirring device with a heating function and heat them at a temperature of 270°C. After the nylon 66 plastic particles and polyethylene particles are melted, start stirring for 20 minutes; b: Then add the neutralizer and water-absorbing particles into the stirring device and continue stirring for 10 minutes; c. Then, the fungicide, antioxidant and ultraviolet absorber are added into the stirring device and stirring is continued for 10 minutes; d: Then add the toughening agent, plasticizer and nucleating agent into the stirring device and continue stirring for 10 minutes.

2. The method for preparing a high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The high-strength modified nylon 66 plastic for automobiles comprises, by weight, 60 to 80 parts of nylon 66 plastic particles, 10 to 15 parts of glass fiber, 10 to 15 parts of calcium carbonate powder, 10 to 20 parts of polyethylene particles, 10 to 15 parts of neutralizer powder, 10 to 15 parts of water-absorbing particles, 5 to 10 parts of fungicide, 2 to 5 parts of antioxidant, 5 to 10 parts of ultraviolet absorber, 5 to 10 parts of toughening agent, 5 to 10 parts of plasticizer and 5 to 10 parts of nucleating agent.

3. The method for preparing a high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The neutralizing agent is calcium chloride powder.

4. The method for preparing a high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The water-absorbing particles are silica gel particles.

5. The method for preparing a high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The bactericide is a silver ion bactericide.

6. The method for preparing a high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The antioxidant is one of 2,6-di-tert-butylphenol, phosphite and thiopropionate.

7. The method for preparing a high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The ultraviolet absorber is one of phenyl o-hydroxybenzoate, 2,4-dihydroxybenzophenone and resorcinol monobenzoate.

8. The method for preparing a high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The toughening agent is EPDM rubber.

9. The method for preparing a high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The plasticizer is one of diphenylphenol, octylcresol, N-methylbenzenesulfonyl, N-butylbenzenesulfonamide and P-methylbenzenesulfonamide.

10. The method for preparing high-strength modified nylon 66 plastic for automobiles according to claim 1, characterized in that: The nucleating agent is one or more of talc and mica.

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