CN109957236A - Reinforced, toughened and wear-resistant lightweight cast nylon composite material and preparation method thereof - Google Patents

Abstract

The invention provides a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which comprises the following raw materials in parts by mass: 80 to 110 parts of amide monomer, 0.1 to 3 parts of catalyst, 0.1 to 3 parts of activator, elastic 0.1 to 10 parts of bulk toughening agent, 0.01 to 5 parts of thin-walled hollow reinforcing agent, and 0.01 to 5 parts of lubricating and wear-resistant agent; the thin-walled hollow reinforcing agent has a density of 0.57 g/cm ³ to 0.63 g/cm ^3. One or a combination of hollow ceramic microbeads, hollow glass microbeads and hollow glass fibers with a particle size or diameter of less than 95 μm. The present invention also provides a method for preparing the composite material, which is to add thin-walled hollow reinforcing agent, elastomer toughening agent, lubricating and wear-resistant agent, catalyst and activator for in-situ modification during the ring-opening polymerization of amide monomer. amide monomer to prepare reinforced, toughened, wear-resistant and lightweight cast nylon composites. This method overcomes the shortcomings of increasing the strength but reducing the toughness, or increasing the toughness but reducing the strength, or failing to take into account the wear resistance.

Description

Reinforced, toughened and wear-resistant lightweight cast nylon composite material and preparation method thereof

technical field

The invention relates to the technical field of polymer materials, in particular to a reinforced, toughened, wear-resistant and lightweight cast nylon composite material and a preparation method.

Background technique

Underground coal mining, drilling, oil extraction and other large-scale mechanical equipment, in the process of gear transmission, worm gear cooperation, etc., metal mechanical parts are subjected to heavy loads, friction is easy to generate sparks, and the working environment contains a lot of flammable and explosive gases, bringing Great safety hazard. When nylon is used as a mechanical part, the load bearing and friction will not produce sparks, and it can achieve the purpose of buffering collision and impact through its own deformation and deflection, and can also reduce the local load caused by installation deviation.

Monomer cast nylon (MCPA) is a kind of nylon, which is obtained by anionic polymerization of reactive monomers under the action of alkali catalysis. In addition to the advantages of polycondensation nylon, monomer cast nylon also has a high degree of polymerization, uniform molecular weight distribution, and a crystallinity of more than 50%; strength, friction and wear resistance, stiffness, chemical resistance, and insulation are more than polycondensed nylon. Advantages; The size of the product is not limited as long as the mold allows it; the process is simple and the cost is low. Therefore, single cast nylon can be used as mechanical parts such as gears, worm gears, pulleys, bearing cages, cams, gaskets, bearing bushes, bushings, sealing rings, slider bottle feeding screws, etc. It is especially suitable for manufacturing injection molding and hot pressing. large products.

However, unmodified cast nylon has poor toughness and low impact strength in dry and low temperature environments; when used as functional parts and load-bearing structures, its strength and friction and wear resistance need to be improved. Therefore, it is of great practical significance to strengthen, toughen, resist friction and self-lubricate the monomer cast nylon. A large number of studies on the reinforcement and modification of cast nylon generally sacrifice toughness to increase strength; or sacrifice strength to obtain higher toughness; or only focus on the improvement of wear resistance, not strength and toughness. When cast nylon is used as a load-bearing and transmission mechanical part, it has high requirements on comprehensive mechanical properties such as strength, toughness and wear resistance. If it cannot be taken into account, the short board in performance will greatly limit its wide application. In addition, thin-walled hollow reinforcing agents and lubricating and anti-wearing agents are usually inorganic solid particles, and the addition of nylon matrix tends to increase the density of the composite material, which is contrary to the strength of the material.

SUMMARY OF THE INVENTION

In view of this, the present invention clearly needs to provide a reinforced, toughened, wear-resistant and lightweight cast nylon composite material and a preparation method to solve the above problems.

The technical scheme adopted in the present invention is: a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which comprises the following raw materials in parts by mass: 80 to 110 parts of amide monomer, 0.1 to 3 parts of catalyst, and 0.1 part of activator. 0.1 to 10 parts of elastomer toughening agent, 0.01 to 5 parts of thin-walled hollow reinforcing agent, and 0.01 to 5 parts of lubricating and wear-resistant agent; the thin-walled hollow reinforcing agent has a density of 0.57 g/cm One or a combination of hollow ceramic microbeads, hollow glass microbeads and hollow glass fibers with a particle size or diameter of less than 95 μm from ³ to 0.63 g/cm ³ .

Based on the above, the reinforced, toughened, wear-resistant and lightweight cast nylon composite material is composed of the following raw materials by mass: 100 parts of amide monomer, 0.1 to 3 parts of catalyst, 0.1 to 3 parts of activator, and elastomer toughening. 0.1 to 10 parts of a thin-walled hollow reinforcing agent, 0.01 to ⁵ parts of a thin-walled hollow reinforcing agent, and 0.01 to ⁵ parts of a lubricating and wear-resistant agent; One or a combination of hollow ceramic microbeads, hollow glass microbeads and hollow glass fibers with a diameter or diameter less than 95 μm.

Based on the above, the elastomer toughening agent is one or a combination of ethylene-octene copolymer (POE), ethylene propylene diene rubber (EPDM) and polyurethane elastomer (TPU).

Based on the above, the lubricant and wear-resistant agent is one or a combination of micron-scale graphite, graphene oxide and molybdenum disulfide.

Based on the above, the amide monomer is one or a combination of caprolactam and laurolactam.

Based on the above, the catalyst is one or a combination of sodium hydroxide, potassium hydroxide, sodium methoxide and sodium ethoxide.

Based on the above, the activator is one or a combination of diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI) or hexamethylene diisocyanate (HDI).

The present invention also provides a method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material, the specific steps comprising:

Mixing and heating in a vacuum environment, stirring the amide monomer, the thin-walled hollow reinforcing agent, the elastomer toughening agent, and the lubricating and anti-wearing agent to melt and mix to obtain a mixed material;

For prepolymerization, the vacuum state is first released, the weighed catalyst is added to the mixture material, and the catalytic prepolymerization reaction is carried out by heating and stirring in a vacuum environment to obtain a prepolymerization slurry; The activator is added to the polymerized slurry and stirred to obtain an activated prepolymerized slurry;

Casting The activated prepolymerized slurry is cast into a hot mold with a temperature of 165°C to 185°C, and after standing, constant temperature, cooling, and demolding, a reinforced, toughened, wear-resistant and lightweight cast nylon composite material is obtained.

Based on the above, the method for preparing a reinforced, toughened, wear-resistant and lightweight cast nylon composite material specifically includes the following steps:

Mixing: firstly add the amide monomer, the thin-walled hollow reinforcing agent, the elastomer toughening agent and the lubricating and anti-wearing agent into the mixing vessel, then vacuumize and heat in a vacuum environment, When the amide monomer is melted, stirring is performed at a rotating speed of 150 rpm to 250 rpm; when the temperature is raised to 120 ° C to 145 ° C, the temperature is kept for 15 min to 45 min to obtain a mixture;

In the prepolymerization, the vacuum state is first released, and the weighed catalyst is added to the mixture material, stirred in a vacuum environment, and heated to 135°C to 165°C for 15 to 45 minutes, and a catalytic prepolymerization reaction occurs to obtain a prepolymerized slurry; Then, the vacuum state is released, and an activator is added to the prepolymerized slurry for stirring to obtain an activated prepolymerized slurry;

Casting: Cast the activated prepolymerized slurry into a hot mold with a temperature of 165°C to 185°C, let it stand, keep the temperature constant, cool, and after demolding, obtain a reinforced, toughened, wear-resistant, and lightweight cast nylon composite material.

Wherein, the method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material further includes the steps of performing stress relief treatment and dimensional processing on the reinforced, toughened, wear-resistant and lightweight cast nylon composite material.

In the present invention, the casting nylon ring-opening polymerization mechanism is as follows:

Formation of lactam anion: At a temperature of 130°C to 140°C, the strong basic compound attacks the nitrogen atom of the amide group in the caprolactam molecule, replacing the hydrogen on the nitrogen atom to generate the lactam anion, and at the same time generate water;

Generation of amine anions: The lactam anion reacts with the monomer caprolactam to open the caprolactam ring to generate an active amine anion. Since the generated amine anion is in an unstable state due to its lack of conjugate stabilization, its activity is higher than that of lactam anion, and it can rapidly abstract a proton in the monomer caprolactam to form an acylated dimer and interact with the lactam anion. regeneration. Compared with caprolactam, the nitrogen atom of the cyclic amide in the acylated dimer is connected to the carbonyl group, which increases the electron deficiency of the amide bond, making the cyclic amide structure in the acylated dimer easily attacked by the nucleophilic lactam anion. Aggregates become the initiating active species necessary for polymerization.

Chain growth: The acylated dimer has extremely high activity and can continue to react with the lactam anion to open the ring of the acylated lactam to generate an amine anion, which then takes a proton on the monomer caprolactam to generate an acylated trimer The acylated trimer undergoes the same process to form the acylated tetramer. This cycle is carried out until the monomer caprolactam is consumed, and finally a polyamide polymer with an acylated lactam group at one end and a primary amino group at the other end is formed, and the ring-opening polymerization reaction of casting nylon is completed.

The reinforced, toughened and wear-resistant lightweight cast nylon composite material disclosed in the present invention is precisely in the process of ring-opening polymerization of amide monomer, adding thin-walled hollow reinforcing agent, elastomer toughening agent, lubricating and anti-wearing agent, in the catalyst and activation process. Under the action of the agent, the cast nylon is modified in situ, so that the thin-walled hollow reinforcing agent, elastomer toughening agent, lubricant and wear-resistant agent are embedded or dispersed into the polyamide with acylated lactam group at one end and primary amino group at the other end. In the polymer, an inseparable network structure is formed, thereby preparing a reinforced, toughened and wear-resistant lightweight cast nylon composite material with high strength, high wear resistance and low density, which overcomes the previous increase in strength while reducing toughness. Toughness reduces strength at the same time, or can not take into account the shortcomings of wear resistance. The test shows that the maximum tensile strength of the reinforced, toughened and wear-resistant lightweight cast nylon composite material can reach more than 100MPa, and the notched impact strength can reach more than 10kJ/m ² . In addition, after the thin-walled hollow reinforcing agent and the elastomer toughening agent are added to the matrix, the present invention not only does not increase the density of the composite material, but also reduces the weight of the composite material.

Detailed ways

The technical solutions of the present invention will be further described in detail below through specific embodiments.

Example 1

This embodiment provides a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following raw materials in parts by mass: 100 parts of ε-caprolactam, 2 parts of hollow glass microspheres with a density of 0.57 g/cm and a particle size ^of 95 μm , 3.5 parts of the ethylene-octene copolymer, 4.5 parts of micron graphite, 0.4 part of sodium methoxide, and 0.5 part of diphenylmethane diisocyanate.

This embodiment also provides a method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following steps:

Mixing Hollow glass microbeads, ethylene-octene copolymer, micron-grade graphite for lubricating and wear-resistant agent, and ε-caprolactam are added to the reactor in sequence, vacuumize, heat up, and start stirring when ε-caprolactam is melted; set the temperature At 125 ° C, the stirring speed is 180 rpm, and the constant temperature, vacuum, and stirring state are maintained for 25 minutes, and the moisture and volatile impurities in the raw materials are removed to obtain a mixed material;

The prepolymerization is released from the vacuum state of the reaction system. After adding sodium methoxide, the vacuum is quickly evacuated, and the temperature is slowly raised to 135 °C. slurry; then release the vacuum state of the reaction system, add diphenylmethane diisocyanate, and stir quickly to obtain an activated prepolymerized slurry;

Casting cast the activated prepolymerized slurry into a hot mold at 170°C, let it stand at a constant temperature for 30 minutes, take out the mold and the sample for natural cooling, and obtain a cast nylon product blank after demoulding;

After-treatment, the product blank is put into boiling water to boil for 3 hours, taken out and cooled to room temperature naturally, and the product blank is mechanically processed as required to finally obtain a reinforced, toughened, wear-resistant and lightweight cast nylon composite product.

Example 2

This embodiment provides a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following raw materials in parts by mass: 100 parts of laurolactam, a density of 0.63 g/cm ³ hollow ceramic microspheres with a particle size of 90 μm 5 parts, 2 parts of polyurethane elastomer, 2 parts of micron-sized molybdenum disulfide, 1 part of potassium hydroxide, and 1 part of hexamethylene diisocyanate.

This embodiment also provides a method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following steps:

Mix the hollow ceramic microbeads, polyurethane elastomer, micro-scale molybdenum disulfide, and laurolactam into the reactor in sequence, vacuumize, heat up, and start stirring when laurolactam is melted; set the temperature at 130°C , the stirring speed is at 200rpm, and the constant temperature, vacuum, and stirring state are maintained for 30min, and the moisture and volatile impurities in the raw materials are removed to obtain a mixed material;

The vacuum state of the reaction system is removed from the prepolymerization, and potassium hydroxide is added to quickly evacuated, and the temperature is slowly raised to 140 ° C, and the constant temperature, vacuum, and stirring state are maintained for 30 minutes to remove the trace moisture entrained in the catalyst, and fully catalyze the prepolymerization reaction to obtain Pre-polymerization slurry; release the vacuum state of the reaction system, add hexamethylene diisocyanate, stir quickly, and activate the pre-polymerization slurry;

Casting cast the activated prepolymerized slurry into a hot mold at 165°C, let it stand at a constant temperature for 35 minutes, take out the mold and the sample for natural cooling, and obtain a cast nylon product blank after demoulding;

After-treatment, the product blank is put into boiling water to boil for 3 hours, taken out and cooled to room temperature naturally, and the product blank is mechanically processed as required to finally obtain a reinforced, toughened, wear-resistant and lightweight cast nylon composite product.

Example 3

This embodiment provides a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following raw materials in parts by mass: 50 parts of ε-caprolactam, 50 parts of laurolactam, a density of 0.63 g/cm ³ and a diameter of 80 μm 1 part of hollow glass fiber, 9 parts of EPDM, 1 part of micron-sized graphene oxide, 1.5 parts of sodium ethoxide, 2 parts of toluene diisocyanate

This embodiment also provides a method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following steps:

Mixing Hollow glass fiber, EPDM rubber, micron-scale graphene oxide, ε-caprolactam, and laurolactam are added to the reactor in sequence, vacuumize, heat up, and start stirring when the amide monomer is melted; Set at 135°C, the stirring speed is 220rpm, the constant temperature, vacuum, and stirring state are maintained for 35min, the moisture and volatile impurities in the raw materials are removed, and the mixed material is obtained;

The prepolymerization is released from the vacuum state of the reaction system. After adding sodium ethoxide, the vacuum is quickly evacuated, and the temperature is slowly raised to 145 ° C. The constant temperature, vacuum, and stirring state are maintained for 25 minutes to remove the trace moisture entrained in the catalyst, and fully catalyze the prepolymerization reaction to obtain the prepolymerization. Slurry; release the vacuum state of the reaction system, add toluene diisocyanate, stir quickly, and activate the prepolymerized slurry;

Casting cast the activated prepolymerized slurry into a hot mold at 170°C, let it stand at a constant temperature for 40 minutes, take out the mold and the sample for natural cooling, and obtain a cast nylon product blank after demoulding;

After-treatment, the product blank is put into boiling water to boil for 3 hours, taken out and cooled to room temperature naturally, and the product blank is mechanically processed as required to finally obtain a reinforced, toughened, wear-resistant and lightweight cast nylon composite product.

Example 4

This embodiment provides a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following raw materials in parts by mass: 80 parts of ε-caprolactam, 20 parts of laurolactam, a density of 0.60 g/ ^cm3 , a particle size of 80 μm 4 parts of hollow glass microspheres, 4 parts of polyurethane elastomer, 3.5 parts of micron-sized molybdenum disulfide, 2 parts of sodium ethoxide, and 1.5 parts of diphenylmethane diisocyanate.

This embodiment also provides a method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following steps:

Mixing Hollow glass microbeads, polyurethane elastomers, micron-scale graphene oxide, ε-caprolactam, laurolactam are added to the reactor in sequence, vacuumize, heat up, and start stirring when the amide monomer is melted; set the temperature At 140 ° C, the stirring speed is 250 rpm, and the constant temperature, vacuum, and stirring state are maintained for 15 minutes, and the moisture and volatile impurities in the raw materials are removed to obtain a mixed material;

The prepolymerization is released from the vacuum state of the reaction system. After adding sodium ethoxide, the vacuum is quickly evacuated, and the temperature is slowly raised to 160 ° C. The constant temperature, vacuum, and stirring state are maintained for 25 minutes to remove the trace moisture entrained in the catalyst, and fully catalyze the prepolymerization reaction to obtain the prepolymerization. Slurry; release the vacuum state of the reaction system, add diphenylmethane diisocyanate, stir quickly, and activate the prepolymerized slurry;

Casting cast the activated prepolymerized slurry into a hot mold at 175° C., let it stand at a constant temperature for 40 minutes, take out the mold and the sample for natural cooling, and obtain a cast nylon product blank after demoulding;

After-treatment, put the product blank into boiling water for 3 hours, take it out and cool it to room temperature naturally, and perform mechanical processing such as turning, milling, grinding, and planing on the product blank according to the requirements, and finally obtain a reinforced, toughened, wear-resistant and lightweight cast nylon composite material. product.

Example 5

This embodiment provides a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following raw materials in parts by mass: 100 parts of laurolactam, 3 parts of hollow ceramic microbeads with a density of 0.59 g/cm ³ and a particle size of 95 μm , 8 parts of EPDM, 3 parts of micron graphite, 2.5 parts of potassium hydroxide, and 3 parts of toluene diisocyanate.

This embodiment also provides a method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following steps:

Mixing Hollow ceramic microbeads, EPDM rubber, micron graphite, and laurolactam are added to the reactor in sequence, vacuumize, heat up, and start stirring when laurolactam is melted; set the temperature at 145°C , the stirring speed is at 200 rpm, and the constant temperature, vacuum, and stirring state are maintained for 15 minutes, and the moisture and volatile impurities in the raw materials are removed to obtain a mixed material;

The prepolymerization is released from the vacuum state of the reaction system. After adding potassium hydroxide, the vacuum is quickly evacuated, and the temperature is slowly raised to 155 ° C. The constant temperature, vacuum, and stirring state are maintained for 20 minutes to remove the trace moisture entrained in the catalyst, and fully catalyze the prepolymerization reaction to release the reaction. When the system is in a vacuum state, add toluene diisocyanate, stir quickly, and activate the prepolymerized slurry;

Casting cast the activated prepolymerized slurry into a hot mold at 180°C, let it stand for 60 minutes at a constant temperature, take out the mold and the sample for natural cooling, and obtain a cast nylon product blank after demoulding;

After-treatment, the product blank is put into boiling water to boil for 3 hours, taken out and cooled to room temperature naturally, and the product blank is mechanically processed as required to finally obtain a reinforced, toughened, wear-resistant and lightweight cast nylon composite product.

Example 6

This embodiment provides a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following raw materials in parts by mass: 100 parts of ε-caprolactam, a density of 0.63 g/cm, 2.5 parts ^of hollow glass fibers with a particle size of 85 μm, 2.5 parts of ethylene -1 part of octene copolymer, 2.5 parts of micron-sized graphene oxide, 3 parts of sodium hydroxide, 2.5 parts of hexamethylene diisocyanate.

This embodiment also provides a method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following steps:

Mixing and adding hollow ceramic microbeads, ethylene-octene copolymer, micron-scale graphene oxide, and ε-caprolactam monomers to the reactor in sequence, vacuuming, heating and heating, and stirring after the ε-caprolactam monomer is melted; The temperature is set at 135 ° C, the stirring speed is at 190 rpm, and the constant temperature, vacuum, and stirring state are maintained for 130 minutes, and the moisture and volatile impurities in the raw materials are removed to obtain a mixed material;

The prepolymerization is released from the vacuum state of the reaction system. After adding sodium hydroxide, the vacuum is quickly evacuated, and the temperature is slowly raised to 160 ° C. The constant temperature, vacuum, and stirring state are maintained for 25 minutes to remove the trace moisture entrained in the catalyst, and fully catalyze the prepolymerization reaction to release the reaction. In the vacuum state of the system, add hexamethylene diisocyanate, stir quickly, and activate the prepolymerized slurry;

Casting cast the activated prepolymerized slurry into a hot mold at 185°C, let it stand at a constant temperature for 65 minutes, take out the mold and the sample for natural cooling, and obtain a cast nylon product blank after demoulding;

After-treatment, the product blank is put into boiling water to boil for 3 hours, taken out and cooled to room temperature naturally, and the product blank is mechanically processed as required to finally obtain a reinforced, toughened, wear-resistant and lightweight cast nylon composite product.

Example 7

This embodiment provides a reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following raw materials in parts by mass: 100 parts of ε-caprolactam, 0.63 g/cm in density, 0.1 part ^of hollow glass microspheres with a particle size of 80 μm, 0.5 part of ethylene-octene copolymer, 0.1 part of micron-sized molybdenum disulfide, 0.25 part of sodium hydroxide, and 0.1 part of toluene diisocyanate.

This embodiment also provides a method for preparing the reinforced, toughened, wear-resistant and lightweight cast nylon composite material, which specifically includes the following steps:

Mixing Hollow glass microspheres, ethylene-octene copolymer, micro-scale molybdenum disulfide, and ε-caprolactam monomer are added to the reactor in sequence, vacuumize, heat up, and start stirring when the ε-caprolactam monomer is melted; The temperature is set at 140 ° C, the stirring speed is at 220 rpm, and the constant temperature, vacuum, and stirring state are maintained for 30 minutes, and the moisture and volatile impurities in the raw materials are removed to obtain a mixed material;

The prepolymerization was released from the vacuum state of the reaction system. After adding sodium hydroxide, the vacuum was quickly evacuated, and the temperature was slowly raised to 155 ° C. The constant temperature, vacuum, and stirring state were maintained for 30 minutes to remove the trace moisture entrained in the catalyst, and fully catalyzed the prepolymerization reaction to release the reaction. When the system is in a vacuum state, add toluene diisocyanate, stir quickly, and activate the prepolymerized slurry;

Casting cast the activated prepolymerized slurry into a hot mold at 180°C, let it stand at a constant temperature for 65 minutes, take out the mold and the sample for natural cooling, and obtain a cast nylon product blank after demoulding;

After-treatment, the product blank is put into boiling water to boil for 3 hours, taken out and cooled to room temperature naturally, and the product blank is mechanically processed as required to finally obtain a reinforced, toughened, wear-resistant and lightweight cast nylon composite product.

Mechanical experimental data

Table 1 shows the tensile, notch impact and wear resistance test results of the reinforced, toughened and wear-resistant lightweight cast nylon composite materials prepared in Examples 1 to 7, respectively. It can be seen from Table 1 that the maximum tensile strength of the reinforced, toughened and wear-resistant lightweight cast nylon composites prepared from Examples 1 to 7 can reach more than 100MPa, and the maximum notched impact strength can reach more than 10kJ/ ^m2 . , The maximum friction coefficient can reach more than 0.8.

Table 1 Mechanical property test of composite materials prepared in Examples 1-7

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand: The specific embodiments of the invention are modified or some technical features are equivalently replaced; without departing from the spirit of the technical solutions of the present invention, all of them should be included in the scope of the technical solutions claimed in the present invention.

Claims (9)

1. a kind of activeness and quietness wearable lightweight cast nylon composite material, which is characterized in that it includes the raw material of following mass parts: 80 parts~110 parts of amide monomer, 0.1 part~3 parts of catalyst, 0.1 part~3 parts of activator, elastomer flexibilizer 0.1 part~10 Part, 0.01 part~5 parts of thin-walled hollow reinforcing agent, 0.01 part~5 parts of lubricating and wear-resisting agent；The thin-walled hollow reinforcing agent is density 0.57 g/cm³~0.63 g/cm³, the hollow ceramic microspheres, hollow glass micropearl and hollow glass of partial size or diameter less than 95 μm The combination of one or more of fiber.

2. activeness and quietness wearable lightweight cast nylon composite material according to claim 1, which is characterized in that it is by following The raw material of mass parts forms: 100 parts of amide monomer, 0.1 part~3 parts of catalyst, 0.1 part of activator~3 parts, elastomer flexibilizer 0.1 part~10 parts, 0.01 part~5 parts of thin-walled hollow reinforcing agent, 0.01 part~5 parts of lubricating and wear-resisting agent；The thin-walled hollow enhancing Agent is 0.57 g/cm of density³~0.63 g/cm³, partial size or diameter less than 95 μm of hollow ceramic microspheres, hollow glass micropearl and The combination of one or more of hollow glass fibre.

3. activeness and quietness wearable lightweight cast nylon composite material according to claim 1 or 2, which is characterized in that described Elastomer flexibilizer is the combination of one or more of ethylene-octene copolymer, ethylene propylene diene rubber and polyurethane elastomer.

4. activeness and quietness wearable lightweight cast nylon composite material according to claim 3, which is characterized in that the lubrication Anti-wear agent is the combination of one or more of micron order graphite, graphene oxide and molybdenum disulfide.

5. activeness and quietness wearable lightweight cast nylon composite material according to claim 4, which is characterized in that the amide Monomer is the compounding of one or both of caprolactam, lauric lactam.

6. activeness and quietness wearable lightweight cast nylon composite material according to claim 5, which is characterized in that the catalysis Agent is the combination of one or more of sodium hydroxide, potassium hydroxide, sodium methoxide and sodium ethoxide.

7. activeness and quietness wearable lightweight cast nylon composite material according to claim 6, which is characterized in that the activation Agent is the group of one or more of methyl diphenylene diisocyanate, toluene di-isocyanate(TDI) or hexamethylene diisocyanate It closes.

8. a kind of method for preparing the described in any item activeness and quietness wearable lightweight cast nylon composite materials of claim 1~7, Specific steps include:

Mixing heats under vacuum conditions, stirs the amide monomer, the thin-walled hollow reinforcing agent, the elastic body toughening Agent and the lubricating and wear-resisting agent carry out melting mixing, obtain mixed material；

Pre-polymerization is first released from vacuum state, the weighed catalyst is added in Xiang Suoshu mixed material, and under vacuum conditions Heating, stirring carry out catalysis prepolymerization reaction, obtain pre-polymerization slurries；Then after releasing vacuum state, add in Xiang Suoshu pre-polymerization slurries Enter activator and be stirred, obtains activation pre-polymerization slurries；

The activation pre-polymerization slurries are cast to temperature by casting, standing, constant temperature, cooling, Activeness and quietness wearable lightweight cast nylon composite material is obtained after demoulding.

9. the method according to claim 8 for preparing activeness and quietness wearable lightweight cast nylon composite material, feature exist In, this method specifically includes the following steps:

The amide monomer, the thin-walled hollow reinforcing agent, the elastomer flexibilizer are added in mixing into mixing vessel first With the lubricating and wear-resisting agent, vacuumize process is then carried out, and is heated under vacuum conditions, when the amide monomer melts When be stirred with the revolving speed of the rpm of 150 rpm~250；15 min~45 are kept the temperature when temperature is warming up to 120 DEG C~145 DEG C Min obtains mixed material；

Pre-polymerization is first released from vacuum state, and the weighed catalyst is added in Xiang Suoshu mixed material, stirs under vacuum conditions It mixes and is warming up to 135 DEG C~165 DEG C and carry out heat preservation 15min~45min generation catalysis prepolymerization reaction, obtain pre-polymerization slurries；Then Vacuum state is released again, and activator is added into the pre-polymerization slurries and is stirred, and obtains activation pre-polymerization slurries；

The activation pre-polymerization slurries are cast in the mold heat that temperature is 165 DEG C~185 DEG C by casting, standing, constant temperature, cooling, Activeness and quietness wearable lightweight cast nylon composite material is obtained after demoulding.