CN114836081B

CN114836081B - Special lubricating wear-resistant coating for repairing automobile wiper rubber strip, and preparation method and application thereof

Info

Publication number: CN114836081B
Application number: CN202210204903.6A
Authority: CN
Inventors: 刘海彬; 何翔; 罗振宇; 贾喆豪; 毕宸洋; 魏鑫
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2023-07-18
Anticipated expiration: 2042-03-03
Also published as: CN114836081A

Abstract

The invention discloses a special lubricating wear-resistant coating for repairing an automobile windscreen wiper rubber strip, a preparation method and application thereof. The neoprene primer coating material comprises the following components in percentage by weight: 100 parts of neoprene, 3-5 parts of peroxide vulcanizing agent, 5-10 parts of cross-linking agent, 1-5 parts of carbon black, 1-3 parts of anti-aging agent and 300-400 parts of organic solvent. The epoxy resin surface coating material comprises the following components in percentage by weight: 100 parts of rubber modified epoxy resin, 5-15 parts of room temperature curing agent, 1-3 parts of accelerator, 7-30 parts of graphene-like molybdenum disulfide, 3-25 parts of graphite, 1-8 parts of metal oxide, 0.5-1.0 part of dispersing agent and 300-600 parts of organic solvent. The original wear surface of the wiper rubber strip is repaired by the neoprene priming material to form a new flat rubber surface, and then a layer of epoxy resin top coating material is coated, so that the wiper rubber strip has excellent cleaning effect and more excellent wear resistance.

Description

Special lubricating wear-resistant coating for repairing automobile wiper rubber strip, and preparation method and application thereof

Technical Field

The invention relates to an automobile wiper rubber strip repairing material, in particular to a preparation method and application of a special lubricating wear-resistant coating material for repairing an automobile wiper rubber strip.

Background

The wiper rubber strip is an important part which is arranged on a windshield of an automobile and used for cleaning rain, snow and dust on the windshield, and is one of important accessories of the automobile wiper system. Therefore, the quality of the wiper strip plays an important role in the running safety, and is listed as an automobile safety product in many countries such as japan, and the importance thereof is seen.

Most of the main materials for the wiper strip are rubber, including natural rubber, neoprene, ethylene propylene rubber and the like, and a few of the main materials are also elastomers. The rubber wiper strip is very easy to form uneven surfaces due to local abrasion in the daily use process, dust and rain and snow cannot be thoroughly removed, and potential safety hazards are formed.

Most automobile windscreen wiper rubber strips are worn out to different degrees to affect use after being used for more than one year, and the windscreen wiper rubber strips need to be replaced once even in half a year in a few rainy areas in the south. According to statistics, the current automobile conservation quantity in China breaks through 2.7 hundred million cars, and the automobile conservation quantity is in a continuous growing trend. Taking the specification of the service life of the windscreen wiper in the specification of a certain brand of automobile as an example, the windscreen wiper rubber strip needs to be replaced once to twice a year. Hundreds of millions of rubber wiper strips replaced each year are calculated at the frequency, which causes great resource waste and environmental pollution.

Many of the used rubber wiper strips are only worn locally, and the whole wiper strips are not aged and eliminated completely, so that the wiper strips can be used continuously after being repaired. At present, a special repair material for the wiper rubber strip is lacking in the market. Therefore, the repair material for the wiper adhesive tape is provided, the service life of the wiper adhesive tape is prolonged, and the repair material has important economic significance and application value.

The neoprene has excellent high elasticity, weather resistance, ozone resistance and heat resistance, and the polar chlorine atoms contained in the molecule thereof also increase the surface wettability of the neoprene. The neoprene can be matched with metal oxide vulcanizing agent, accelerator, cross-linking agent and the like to prepare neoprene adhesive, has excellent bonding effect with various materials such as rubber, plastic and the like, and is a potential repairing material for the wiper strip. However, there is still a hidden danger of poor wear resistance and durability after repairing the wiper with neoprene, so it is necessary to add a layer of surface-coating lubricating coating with excellent adhesion strength and excellent wear resistance on the basis of neoprene material.

The epoxy resin is a compound containing two or more epoxy groups in the molecule, has extremely high bonding strength and stability after curing, and is an excellent material for preparing the wear-resistant coating. However, the traditional epoxy resin has poor toughness after being cured, is easy to generate brittle fracture and easily fall off from the surface of the wiper rubber strip, and needs to be further toughened and modified and the bonding strength between the epoxy resin and chloroprene rubber is improved.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to overcome the defects in the prior art, provide a special lubricating wear-resistant coating for repairing an automobile wiper rubber strip, a preparation method and application thereof, and provide a lubricating wear-resistant coating for repairing, which consists of a prime coat and a surface coating double-layer structure, aiming at the uneven surface of the wiper rubber strip formed by local abrasion in the daily use process, and comprises the preparation method and application method thereof. The lubricating wear-resistant coating base coating material for repairing has good combination property and adhesion with the wiper rubber strip matrix material, and the surface coating material has good toughness, wear resistance and ageing resistance.

The main material of the repair base coat is neoprene, and the main material of the surface-coating lubricating wear-resistant coating is rubber toughened epoxy resin.

The low molecular weight polyamide is pre-embedded in the neoprene primer material, so that the low molecular weight polyamide is used as a cross-linking agent of neoprene on one hand, and the reactivity of the low molecular weight polyamide and the epoxy resin molecular chain reaction are reserved on the other hand. So that the cross-linked network structure of the bottom layer and the surface layer are connected with each other, and the bonding capability of the two is enhanced. The vulcanizing agent of neoprene is selected to be of the peroxide type, which reacts with the alpha-H atoms of neoprene, and the-Cl groups remain. And then, adding metal oxide into the epoxy resin surface coating material as solid filler, wherein on one hand, the strength and the wear resistance of the epoxy resin material are improved, and on the other hand, the metal oxide has the activity of reacting with-Cl groups in the chloroprene rubber base coating material, so that the crosslinked structure of the chloroprene rubber extends into an epoxy resin molecular chain, the binding force between the base coating and the surface coating is further improved, and the epoxy surface coating is prevented from being worn and shed in a large area under the long-term friction effect.

In order to achieve the aim of the invention, the invention adopts the following technical scheme:

a special lubricating wear-resistant coating for repairing an automobile wiper rubber strip is composed of two layers of structural materials of a chloroprene rubber base coating material and an epoxy resin top coating material; the chloroprene rubber primer coating material consists of chloroprene rubber, a vulcanizing agent, a cross-linking agent, carbon black, an anti-aging agent and an organic solvent; the epoxy resin surface coating material consists of rubber toughened epoxy resin, a curing agent, graphene-like molybdenum disulfide, graphite, metal oxide, a dispersing agent and an organic solvent. The automobile wiper rubber strip repairing coating material with good repairing property and frictional wear property realizes the size repair of the worn part of the wiper rubber strip.

Preferably, the neoprene primer coating material comprises the following components in percentage by weight: 100 parts of neoprene, 3-5 parts of peroxide vulcanizing agent, 5-10 parts of cross-linking agent, 1-5 parts of carbon black, 1-3 parts of anti-aging agent and 300-400 parts of organic solvent.

Preferably, in the neoprene primer material, the peroxide vulcanizing agent is 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide or 2, 4-dichloro benzoyl peroxide;

preferably, the cross-linking agent is a low molecular weight polyamide;

preferably, the anti-aging agent is 2, 6-di-tert-butyl-p-cresol;

preferably, the organic solvent is any one or a mixture of any two or more of toluene, solvent gasoline and ethyl acetate.

Preferably, the epoxy resin surface coating material forms an epoxy resin lubrication wear-resistant coating layer coating, and the material composition and the proportion are as follows: 100 parts of rubber modified epoxy resin, 5-15 parts of room temperature curing agent, 1-3 parts of accelerator, 7-30 parts of graphene-like molybdenum disulfide, 3-25 parts of graphite, 1-8 parts of metal oxide, 0.5-1 part of dispersing agent and 300-600 parts of organic solvent.

Preferably, in the epoxy resin topcoat material, the rubber modified epoxy resin employs at least one of KR202C, KR and KR309 modified with nitrile rubber, and KSR-1000 modified with silicone rubber;

preferably, the curing agent adopts at least one of diethylenetriamine, triethylenetetramine, ethylenediamine, hexamethylenediamine and m-phenylenediamine;

preferably, the metal oxide is at least one of zinc oxide and magnesium oxide;

preferably, the dispersant is calcium stearate;

preferably, the organic solvent adopts any one or a mixture of any two of acetone and methyl ethyl ketone.

In the neoprene formula, a peroxide vulcanizing agent reacts with alpha-H atoms on chloroprene to form a crosslinked structure, a-Cl group still remains, and the pre-buried low molecular weight polyamide is used as the crosslinking agent to further perfect a network structure. An epoxy layer is applied to the neoprene before it is fully crosslinked. At this time, the low molecular weight polyamide in the neoprene has reactivity with the epoxy resin molecules, while the-Cl groups have reactivity with the magnesium oxide and zinc oxide fillers in the epoxy resin. Thereby connecting the molecular networks of the two layers of materials and improving the binding force. The graphene-like molybdenum disulfide is a lubricating material similar to a graphene structure, has a layered structure of S-Mo-S covalent bond combination, and has relatively weak physical action between layers so that the graphene-like molybdenum disulfide is very easy to slide, and meanwhile, graphite is a self-lubricating material, and the lubricating and wear-resisting performances of the epoxy resin surface coating material are greatly improved by the synergistic effect of the graphene-like molybdenum disulfide and the self-lubricating material.

The invention relates to a preparation method of a special lubricating wear-resistant coating for repairing an automobile wiper rubber strip, wherein a neoprene primer coating material and an epoxy resin top coating material are both A, B bi-component materials;

the preparation of the chloroprene rubber primer material is specifically as follows:

firstly plasticating neoprene in an internal mixer for 5+/-1 min at the processing temperature of not lower than 90 ℃, then adding carbon black and an anti-aging agent, continuing plasticating for 5-10 min, putting the obtained product into a sealed reactor containing a solvent after plasticating, keeping the temperature at 40+/-5 ℃, and stirring for 15-20 min until the rubber is completely dissolved, wherein the obtained mixed glue solution is the component A of the neoprene primer material;

mechanically stirring a vulcanizing agent and a cross-linking agent of the chloroprene rubber in a closed container containing a solvent for 3-5 min, and uniformly mixing the mixture to obtain a component B of a chloroprene rubber primer material;

the preparation of the epoxy resin surface coating material comprises the following specific steps:

firstly, adding graphene-like molybdenum disulfide, graphite, metal oxide and a dispersing agent into an organic solvent according to a formula proportion of a top coating, and oscillating for at least 10min by an ultrasonic cleaner to obtain a premix; mechanically stirring a rubber modified epoxy resin matrix for 5-10 min under water bath heating at the temperature of not lower than 60 ℃, adding a premix of graphene-like molybdenum disulfide, graphite, metal oxide and a dispersing agent into the epoxy resin, and stirring in a high-speed shearing machine for 10-15 min to obtain a mixed solution which is the component A of the epoxy resin surface coating material;

stirring the normal-temperature curing agent and the accelerator of the epoxy resin in a closed container containing a solvent for 3-5 min, and mixing the mixture to obtain the component B of the epoxy resin surface coating material.

Preferably, the neoprene primer material is prepared specifically as follows:

firstly plasticating 100g neoprene in an internal mixer at a processing temperature of not lower than 90 ℃ for 5+/-1 min, then adding 1-5 g carbon black and 1-3 g anti-aging agent, continuing plasticating for 5-10 min, putting the mixture into a sealed reactor containing 270-380 g solvent after plasticating is completed, keeping the temperature at 40+/-5 ℃ and stirring for 15-20 min until the rubber is completely dissolved, and obtaining mixed glue solution which is the component A of the neoprene primer material;

mechanically stirring 3-5 g of vulcanizing agent of chloroprene rubber and 5-10 g of cross-linking agent in a closed container containing 20-70 g of solvent for 3-5 min, and uniformly mixing the mixture to obtain a component B of the chloroprene rubber primer material;

and storing the A, B component mixed liquid respectively for standby.

Preferably, the epoxy resin topcoat material is prepared specifically as follows:

firstly, adding 7-30 g of graphene-like molybdenum disulfide, 3-25 g of graphite, 1-8 g of metal oxide and 0.5-1 g of dispersing agent into 270-550 g of organic solvent according to the proportion of a surface coating formula, and oscillating for at least 10min by an ultrasonic cleaner to obtain a premix; then, mechanically stirring 100g of rubber modified epoxy resin matrix for 5-10 min under the water bath heating at the temperature of not lower than 60 ℃, then adding the premix into the epoxy resin, and stirring in a high-speed shearing machine for 10-15 min to obtain a mixed solution, namely the component A of the epoxy resin surface coating material;

stirring 5-15 g of normal temperature curing agent of epoxy resin and 1-3 g of accelerator in a closed container containing 30-100 g of solvent for 3-5 min, and mixing to obtain a mixed solution, namely the component B of the epoxy resin surface coating material;

and storing the A, B component mixed liquid respectively for standby.

The application of the special lubricating wear-resistant coating for repairing the automobile wiper rubber strip comprises the following steps:

(1) dismantling the worn wiper rubber strip, polishing by using sand paper, wiping by using acetone, and airing;

(2) the component B of the neoprene primer is added into the component A according to a proportion, and is stirred for 5 to 10 minutes to be fully dissolved and evenly mixed for standby;

(3) the component B of the epoxy resin surface coating material is added into the component A according to the proportion, and the mixture is stirred for 5 to 10 minutes to be fully and uniformly mixed for standby;

(4) coating the mixed chloroprene rubber primer material on the working surface of a wiper strip, scraping the coating by using a polytetrafluoroethylene scraping blade, standing at room temperature for 30-60 min to crosslink and solidify the coating, and repairing the abrasion and the pit of the working surface of the adhesive tape;

(5) when the neoprene is stood and solidified until the surface still has a little viscosity, the epoxy resin surface coating material is rapidly sprayed on the adhesive tape, the thickness of the coating is controlled to be 10-20 mu m, and the neoprene can be used after standing for 30-60 min at room temperature and naturally leveling and solidifying.

When the abrasion of the wiper rubber strip is serious, the using method comprises the following steps: an epoxy resin lubrication wear-resistant coating sprayed or scraped on the whole wiper rubber strip,

further, in order to ensure that the low molecular weight polyamide and the-Cl groups in the neoprene are still reactive, and the epoxy resin has not yet started to crosslink, the step (3) and the step (5) are completed simultaneously. Thereby ensuring that the underlying and facing materials can react with each other after the epoxy resin is applied to form a crosslinked network connection.

For the wiper adhesive tape which is used for a period of time but has no obvious abrasion, the using method of the wiper adhesive tape follows the part of the epoxy resin surface coating material in the steps (1), (3) and (5) to treat the adhesive tape, so that the cleaning effect of the wiper adhesive tape can be effectively improved, and the abrasion of the wiper adhesive tape can be delayed.

Compared with the prior art, the invention has the following obvious prominent substantive features and obvious advantages:

1. the lubricating wear-resistant coating is used for repairing the wiper rubber strip, solves the trouble caused by the fact that most people need to change due to slight wear of the wiper rubber strip, reduces the resource waste and the environmental pollution caused by the annual replacement of the rubber wiper rubber strip, and greatly saves the cost;

2. the invention is a new idea of lubricating wear-resistant coating consisting of a prime coating and a surface coating semi-interpenetrating double-layer structure; epoxy resin is adopted as a surface layer, so that a good wear-resisting effect is provided and the friction coefficient is reduced; the neoprene is adopted as the bottom layer, so that the bonding strength of the epoxy resin wear-resistant layer and the wiper rubber base material is improved, and the wear-resistant layer is prevented from falling off;

3. compared with the prior wiper rubber strip surface coating, the lubricating wear-resistant coating for repairing the wiper rubber strip has lower friction coefficient and better wear resistance, and can greatly prolong the service life of the wiper rubber strip; in addition, all materials are easy to obtain, the cost is relatively low, and the preparation method and the using method are simple and clear and are suitable for popularization and use; the method is simple and feasible, has low cost and is suitable for popularization and application.

Drawings

Fig. 1 is a schematic structural diagram of a semi-interpenetrating network formed by a neoprene primer coating material and an epoxy resin top coating material according to the present invention.

Fig. 2 is a schematic diagram of the use of the lubricating wear-resistant coating for repairing, which consists of a priming coating and a top coating double-layer structure, wherein (a) is a sectional view of a wear wiper rubber strip, (b) is the application of priming nitrile rubber, (c) is the application of top coating epoxy rubber, and (d) is the coating of the cured wiper rubber strip of the lubricating wear-resistant coating for repairing.

Detailed Description

The foregoing aspects are further described in conjunction with specific embodiments, and the following detailed description of preferred embodiments of the present invention is provided:

embodiment one:

in the embodiment, 100g of neoprene is plasticated in an internal mixer at the processing temperature of 90 ℃ for 5min, then 1g of carbon black and 1g of 2, 6-di-tert-butyl-p-cresol are added for further plastication for 5min, after the plastication is finished, the neoprene is put into a sealed reaction vessel containing 360g of mixed solvent of toluene and ethyl acetate, the temperature is kept at about 40 ℃, and stirring is carried out for 15-20 min until rubber is completely dissolved, so that the obtained glue solution is chlorine Ding Detu A component material. 3g of 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide and 5g of low molecular weight polyamide are mechanically stirred in a closed container filled with 40g of mixed solvent of toluene and ethyl acetate for 3-5 min and uniformly mixed, and the mixed solution is the component B of the chlorine Ding Detu material. And storing the A, B component mixed liquid respectively for standby.

7g of graphene-like molybdenum disulfide, 25g of graphite and 0.5g of calcium stearate are added into 270g of acetone organic solvent, and the mixture is uniformly mixed by oscillating for 10min through an ultrasonic cleaner. Then adding 100g of butyronitrile toughened epoxy resin KR202C and 8g of zinc oxide, and stirring in a high-speed shearing machine for 10min to obtain a mixed solution which is the component A of the epoxy surface coating material. 5g of m-phenylenediamine and 1g of NP-30 are stirred for 3 to 5 minutes in a closed container containing 30g of acetone solvent, and the mixture is the component B of the epoxy surface coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the worn wiper rubber strip, polishing by using sand paper, and wiping by using acetone for airing. And adding 4.8g of mixed solution of the component B of the chlorine Ding Detu material into 46.2g of mixed solution of the component A of the chlorine Ding Detu material, coating the mixed solution on the surface of a wiper rubber strip, ensuring the coating to be smooth by using a polytetrafluoroethylene wiper blade, and standing and curing for 60 minutes at room temperature.

3.6g of epoxy component B mixed solution is added into 41g of epoxy component A glue solution, and then the mixture is rapidly coated on the surface layer of the wiper rubber strip when chlorine Ding Detu material is still slightly sticky after standing and solidifying, so that the coating is ensured to be smooth, and the mixture is stood for 60min at room temperature and can be used after solidifying.

Example two

This embodiment is substantially the same as the first embodiment, and is characterized in that:

in the embodiment, 100g of neoprene is plasticated in an internal mixer at the processing temperature of 90 ℃ for 5min, then 5g of carbon black and 3g of 2, 6-di-tert-butyl-p-cresol are added for further plastication for 5min, after the plastication is finished, the neoprene is put into a sealed reaction vessel containing 270g of mixed solvent of toluene and gasoline, the temperature is kept at about 40 ℃, and stirring is carried out for 15-20 min until rubber is completely dissolved, thus obtaining the glue solution which is the component material of chlorine Ding Detu A. 5g of 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide and 10g of low molecular weight polyamide are mechanically stirred in a closed container filled with 30g of mixed solvent of toluene and ethyl acetate for 3-5 min and uniformly mixed, and the mixed solution is the component B of the chlorine Ding Detu material. And storing the A, B component mixed liquid respectively for standby.

30g of graphene-like molybdenum disulfide, 3g of graphite and 1g of calcium stearate are added into 500g of methyl ethyl ketone organic solvent, and the mixture is pre-mixed by oscillating for 10min through an ultrasonic cleaner. Then 100g of silicone rubber toughened epoxy resin KSR1000 and 1g of zinc oxide are added, and stirred in a high-speed shearing machine for 15min, and the obtained mixed solution is the component A of the epoxy surface coating material. 5g of diethylenetriamine and 1g of DMP-30 are stirred for 3-5 min and mixed in a closed container containing 100g of methyl ethyl ketone solvent, and the mixed solution is the component B of the epoxy surface coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the worn wiper rubber strip, polishing by using sand paper, and wiping by using acetone for airing. And adding 4.5g of mixed solution of the component B of the chlorine Ding Detu material into 37.8g of mixed solution of the component A of the chlorine Ding Detu material, coating the mixed solution on the surface of a wiper strip, ensuring the coating to be smooth by using a polytetrafluoroethylene wiper blade, and standing and curing for 60 minutes at room temperature.

Adding 10.6g of epoxy component B mixed solution into 63.5g of epoxy component A glue solution, then rapidly coating the glue solution on the surface layer of the wiper strip when chlorine Ding Detu material is still slightly sticky after standing and curing, controlling the thickness of the glue solution to be 10-20 mu m, ensuring the coating to be smooth, standing for 60min at room temperature, and mounting the glue solution after curing.

Example III

This embodiment is substantially the same as the above embodiment, and is characterized in that:

in the embodiment, 100g of neoprene is plasticated in an internal mixer at the processing temperature of 90 ℃ for 5min, then 3g of carbon black and 2g of 2, 6-di-tert-butyl-p-cresol are added for further plastication for 5min, after the plastication is finished, the neoprene is put into a sealed reaction vessel containing 300g of mixed solvent of toluene and ethyl acetate, the temperature is kept at about 40 ℃, and stirring is carried out for 15-20 min until rubber is completely dissolved, so that the obtained glue solution is chlorine Ding Detu A component material. 4g of 2, 4-dichloro benzoyl peroxide and 8g of low molecular weight polyamide are mechanically stirred for 3-5 min and uniformly mixed in a closed container containing 50g of mixed solvent of toluene and ethyl acetate, and the mixed solution is chlorine Ding Detu material B component. And storing the A, B component mixed liquid respectively for standby.

20g of graphene-like molybdenum disulfide, 15g of graphite and 1g of calcium stearate are added into 350g of acetone organic solvent, and the mixture is uniformly mixed by oscillating for 10min through an ultrasonic cleaner. Then adding 100g of nitrile rubber toughened epoxy resin KR208 and 4g of magnesium oxide, and stirring in a high-speed shearing machine for 10min to obtain a mixed solution which is the component A of the epoxy surface coating material. 10g of triethylene tetramine and 2g of DMP-30 are stirred for 3-5 min in a closed container containing 50g of acetone solvent, and the mixed solution is the component B of the epoxy face coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the worn wiper rubber strip, polishing by using sand paper, and wiping by using acetone for airing. 6.2g of chlorine Ding Detu material B component mixed solution is added into 40.5g of chlorine Ding Detu material A component glue solution, then the glue solution is coated on the surface of a wiper rubber strip, a polytetrafluoroethylene wiper blade is used for guaranteeing the coating to be smooth, and standing and curing are carried out for 60 minutes at room temperature.

Adding 6.2g of epoxy component B mixed solution into 49g of epoxy component A glue solution, then rapidly coating the glue solution on the surface layer of the wiper strip when chlorine Ding Detu material is still slightly sticky after standing and curing, controlling the thickness of the glue solution to be 10-20 mu m, ensuring the coating to be smooth, standing for 60min at room temperature, and mounting the glue solution after curing.

Example IV

in the embodiment, 100g of neoprene is plasticated in an internal mixer at the processing temperature of 90 ℃ for 5min, then 5g of carbon black and 2g of 2, 6-di-tert-butyl-p-cresol are added for further plastication for 5min, after the plastication is finished, the neoprene is put into a sealed reaction container containing 320g of solvent gasoline, the temperature is kept at about 40 ℃, and stirring is carried out for 15-20 min until the rubber is completely dissolved, thus obtaining the glue solution which is the chlorine Ding Detu A component material. 3g of 2, 4-dichloro benzoyl peroxide and 10g of low molecular weight polyamide are mechanically stirred for 3-5 min and uniformly mixed in a closed container filled with 30g of solvent gasoline, and the mixed solution is chlorine Ding Detu material B component. And storing the A, B component mixed liquid respectively for standby.

15g of graphene-like molybdenum disulfide, 20g of graphite and 0.7g of calcium stearate are added into a mixed solvent of 350g of methyl ethyl ketone and acetone, and the mixture is uniformly mixed by oscillating for 10min through an ultrasonic cleaner. Then adding 100g of nitrile rubber toughened epoxy resin KR309 and 8g of magnesium oxide, and stirring in a high-speed shearing machine for 10min to obtain a mixed solution which is the component A of the epoxy surface coating material. 15g of triethylene tetramine and 3g of DMP-30 are stirred for 3-5 min and mixed in a closed container containing 50g of mixed solvent of methyl ethyl ketone and acetone, and the mixed solution is the component B of the epoxy top coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the worn wiper rubber strip, polishing by using sand paper, and wiping by using acetone for airing. 4.3g of chlorine Ding Detu material B component mixed solution is added into 42.7g of chlorine Ding Detu material A component glue solution, then the glue solution is coated on the surface of a wiper rubber strip, a polytetrafluoroethylene wiper blade is used for guaranteeing the coating to be smooth, and standing and curing are carried out for 60 minutes at room temperature.

Adding 6.8g of epoxy component B mixed solution into 49g of epoxy component A glue solution, then rapidly coating the glue solution on the surface layer of the wiper strip when chlorine Ding Detu material is still slightly sticky after standing and curing, controlling the thickness of the glue solution to be 10-20 mu m, ensuring the coating to be smooth, standing for 40min at room temperature, and mounting the glue solution after curing.

Example five

in the embodiment, 100g of neoprene is plasticated in an internal mixer at the processing temperature of 90 ℃ for 5min, then 5g of carbon black and 1g of 2, 6-di-tert-butyl-p-cresol are added for further plastication for 5min, after the plastication is finished, the neoprene is put into a sealed reaction vessel containing 280g of toluene solvent, the temperature is kept at about 40 ℃, and stirring is carried out for 15-20 min until the rubber is completely dissolved, thus obtaining the glue solution which is the chlorine Ding Detu A component material. 5g of 2, 4-dichloro benzoyl peroxide and 10g of low molecular weight polyamide are mechanically stirred for 3-5 min and uniformly mixed in a closed container containing 70g of toluene solvent, and the mixed solution is chlorine Ding Detu material B component. And storing the A, B component mixed liquid respectively for standby.

7g of graphene-like molybdenum disulfide, 25g of graphite and 0.8g of calcium stearate are added into a mixed solvent of 420g of methyl ethyl ketone and acetone, and the mixture is uniformly mixed by oscillating for 10min through an ultrasonic cleaner. Then 100g of silicone rubber toughened epoxy resin KSR1000 and 1g of magnesium oxide are added, and stirred in a high-speed shearing machine for 10min, and the obtained mixed solution is the component A of the epoxy surface coating material. 15g of ethylenediamine and 2g of DMP-30 are stirred for 3-5 min and mixed in a closed container containing 80g of mixed solvent of methyl ethyl ketone and acetone, and the mixed solution is the component B of the epoxy top coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the worn wiper rubber strip, polishing by using sand paper, and wiping by using acetone for airing. 8.5g of chlorine Ding Detu material B component mixed solution is added into 38.6g of chlorine Ding Detu material A component glue solution, then the glue solution is coated on the surface of a wiper rubber strip, a polytetrafluoroethylene wiper blade is used for guaranteeing the coating to be smooth, and standing and curing are carried out for 60 minutes at room temperature.

9.7g of epoxy component B mixed solution is added into 55.4g of epoxy component A glue solution, then the mixture is rapidly coated on the surface layer of a wiper rubber strip when chlorine Ding Detu material is still slightly sticky after standing and curing, the thickness of the mixture is controlled to be 10-20 mu m, the coating is ensured to be smooth, the mixture is stood for 30min at room temperature, and the mixture can be used after curing.

Example six

in the embodiment, 100g of neoprene is plasticated in an internal mixer at the processing temperature of 90 ℃ for 5min, then 3g of carbon black and 3g of 2, 6-di-tert-butyl-p-cresol are added for further plastication for 5min, after the plastication is completed, the neoprene is put into a sealed reaction vessel containing 380g of ethyl acetate solvent, the temperature is kept at about 40 ℃, and stirring is carried out for 15-20 min until rubber is completely dissolved, thus obtaining glue solution which is chlorine Ding Detu A component material. 5g of 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide and 5g of low molecular weight polyamide are mechanically stirred in a closed container containing 20g of ethyl acetate solvent for 3 to 5min and uniformly mixed, and the mixed solution is the component B of the chlorine Ding Detu material. And storing the A, B component mixed liquid respectively for standby.

10g of graphene-like molybdenum disulfide, 20g of graphite and 1g of calcium stearate are added into 440g of methyl ethyl ketone solvent, and the mixture is uniformly mixed by oscillating for 10min through an ultrasonic cleaner. Then adding 100g of silicone rubber toughened epoxy resin KR309 and 3g of magnesium oxide, and stirring in a high-speed shearing machine for 10min to obtain a mixed solution which is the component A of the epoxy surface coating material. 5g of m-phenylenediamine and 1g of NP-30 are stirred for 3 to 5 minutes and mixed in a closed container containing 60g of methyl ethyl ketone solvent, and the mixed solution is the component B of the epoxy face coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the worn wiper rubber strip, polishing by using sand paper, and wiping by using acetone for airing. 3g of chlorine Ding Detu material B component mixed solution is added into 48.6g of chlorine Ding Detu material A component glue solution, then the mixture is coated on the surface of a wiper rubber strip, the coating is ensured to be flat by a polytetrafluoroethylene wiper blade, and the mixture is stood and solidified for 60 minutes at room temperature.

And adding 6.8g of epoxy component B mixed solution into 59.2g of epoxy component A glue solution, then rapidly coating the glue solution on the surface layer of the wiper strip when chlorine Ding Detu material is still slightly sticky after standing and curing, controlling the thickness of the glue solution to be 10-20 mu m, ensuring the coating to be smooth, standing for 60min at room temperature, and mounting the glue solution after curing.

Example seven

in the embodiment, 100g of neoprene is plasticated in an internal mixer at the processing temperature of 90 ℃ for 5min, then 5g of carbon black and 1g of 2, 6-di-tert-butyl-p-cresol are added for further plastication for 5min, after the plastication is finished, the neoprene is put into a sealed reaction vessel containing 350g of toluene solvent, the temperature is kept at about 40 ℃, and stirring is carried out for 15-20 min until the rubber is completely dissolved, thus obtaining the glue solution which is the chlorine Ding Detu A component material. 4g of 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide and 8g of low molecular weight polyamide are mechanically stirred in a closed container containing 50g of toluene solvent for 3-5 min and uniformly mixed, and the mixed solution is the component B of the chlorine Ding Detu material. And storing the A, B component mixed liquid respectively for standby.

10g of graphene-like molybdenum disulfide, 20g of graphite and 1g of calcium stearate are added into 440g of methyl ethyl ketone solvent, and the mixture is pre-mixed by oscillating for 10min through an ultrasonic cleaner. Then adding 100g of silicone rubber toughened epoxy resin KR309 and 1g of zinc oxide, and stirring in a high-speed shearing machine for 10min to obtain a mixed solution which is the component A of the epoxy surface coating material. 15g of m-phenylenediamine and 3g of NP-30 are stirred for 3 to 5 minutes in a closed container containing 60g of methyl ethyl ketone solvent, and the mixed solution is the component B of the epoxy face coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the worn wiper rubber strip, polishing by using sand paper, and wiping by using acetone for airing. And adding 6.2g of the mixed solution of the component B of the chlorine Ding Detu material into 45.6g of the mixed solution of the component A of the chlorine Ding Detu material, coating the mixed solution on the surface of a wiper strip, ensuring the coating to be smooth by using a polytetrafluoroethylene wiper blade, and standing and curing for 60 minutes at room temperature.

7.8g of epoxy component B mixed solution is added into 57.2g of epoxy component A glue solution, then the glue solution is rapidly coated on the surface layer of a wiper rubber strip when chlorine Ding Detu material is still slightly sticky after standing and curing, the thickness of the glue solution is controlled to be 10-20 mu m, the coating is ensured to be smooth, the glue solution is stood for 30min at room temperature, and the glue solution can be used after curing.

Example eight

in this example, 7g of graphene-like molybdenum disulfide, 3g of graphite and 0.5g of calcium stearate were added to 270g of acetone solvent, and the mixture was uniformly mixed by shaking for 10 minutes with an ultrasonic cleaner. Then adding 100g of silicone rubber toughened epoxy resin KSR1000 and 1g of zinc oxide, and stirring in a high-speed shearing machine for 10min to obtain a mixed solution which is the component A of the epoxy surface coating material. 10g of m-phenylenediamine and 1g of NP-30 are stirred for 3 to 5 minutes in a closed container containing 30g of acetone solvent, and the mixed solution is the component B of the epoxy surface coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the wiper rubber strip with the slightly worn surface, polishing by using sand paper, and wiping by using acetone for airing. Adding 4.1g of epoxy resin B component mixed solution into 38.2g of epoxy resin A glue solution, stirring uniformly, then rapidly spraying on the surface layer of the wiper strip, controlling the thickness to be 10-20 mu m, ensuring the coating to be flat, standing for 40min at room temperature, and mounting after solidification.

Example nine

in this example, 30g of graphene-like molybdenum disulfide, 25g of graphite and 1g of calcium stearate were added to 550g of a mixed solvent of acetone and ethyl acetate, and the mixture was uniformly mixed by shaking for 10 minutes with an ultrasonic cleaner. Then 100g of silicone rubber toughened epoxy resin KSR1000 and 8g of magnesium oxide are added, and stirred in a high-speed shearing machine for 15min, and the obtained mixed solution is the component A of the epoxy resin surface coating material. 15g of diethylenediamine and 2g of DMP-30 are stirred for 3-5 min and mixed in a closed container containing 50g of mixed solvent of acetone and ethyl acetate, and the mixed solution is the component B of the epoxy resin surface coating material. And storing the A, B component mixed liquid respectively for standby.

And (3) detaching the wiper rubber strip with the slightly worn surface, polishing by using sand paper, and wiping by using acetone for airing. Adding 6.7g of epoxy resin B component mixed solution into 71.4g of epoxy resin A component glue solution, stirring uniformly, spraying onto the surface layer of the wiper strip rapidly, controlling the thickness to be 10-20 mu m, ensuring the coating to be flat, standing for 30min at room temperature, and mounting after solidification.

The sliding friction coefficients of the wiper rubber strip with repaired abrasion and the wiper rubber strip without repaired abrasion in the embodiment are respectively measured under the working condition of water lubrication with glass, and the test conditions are as follows: the friction torque is 15N/m, the friction speed is 0.1m/s, the friction period is 800s, and the test result is as follows: (1) the friction coefficient of the abraded and unrepaired wiper rubber strip is 0.27; (2) the friction coefficients of the repaired wiper rubber strips in the first embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment and the eighth embodiment are 0.20-0.25, and the friction coefficients are 0.21, 0.23 and 0.25 respectively; (3) the friction coefficients of the repaired wiper strips in the second embodiment, the third embodiment, the fourth embodiment and the ninth embodiment are 0.18-0.20, and the friction coefficients are 0.20, 0.19 and 0.18 respectively. Therefore, the friction coefficient of the repaired wiper rubber strip is lower than that of the unrepaired wiper rubber strip, the lubricating effect is excellent, the surface coating of the repaired wiper rubber strip does not fall off in the friction period, and no obvious moisture remains in the grinding process.

In summary, the invention relates to a lubricating wear-resistant coating for repairing an automobile wiper strip and a preparation and use method thereof. The coating consists of a chloroprene rubber primer coating material and an epoxy resin surface coating material, wherein the chloroprene rubber primer coating material comprises the following components in parts by weight: the neoprene primer coating material comprises the following components in percentage by weight: 100 parts of neoprene, 3-5 parts of peroxide vulcanizing agent, 5-10 parts of cross-linking agent, 1-5 parts of carbon black, 1-3 parts of anti-aging agent and 300-400 parts of organic solvent; the epoxy resin surface coating material comprises the following components in parts by weight: 100 parts of rubber modified epoxy resin, 5-15 parts of room temperature curing agent, 1-3 parts of accelerator, 7-30 parts of graphene-like molybdenum disulfide, 3-25 parts of graphite, 1-8 parts of metal oxide, 0.5-1 part of dispersing agent and 300-600 parts of organic solvent. The invention provides a double-layer structure lubricating wear-resistant coating for repairing the wiper rubber strip, which can solve the trouble caused by slight wear of the wiper rubber strip, namely, the replacement of the wiper rubber strip, reduce the resource waste and environmental pollution caused by the replacement of the wiper rubber strip each year, and greatly save the cost.

The special lubricating wear-resistant coating for repairing the automobile wiper rubber strip consists of the neoprene primer coating material and the epoxy resin surface coating material, the original wear surface of the wiper rubber strip is repaired by the neoprene primer coating material to form a new flat rubber surface, and a layer of epoxy resin surface coating material is coated, so that the wiper rubber strip has excellent cleaning effect and excellent wear resistance again. The invention provides an unprecedented repair material for a wiper adhesive tape in the market, prolongs the service life of the wiper adhesive tape, and has important economic significance and application value.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above, and various changes, modifications, substitutions, combinations or simplifications made under the spirit and principles of the technical solution of the present invention can be made according to the purpose of the present invention, and all the changes, modifications, substitutions, combinations or simplifications should be equivalent to the substitution, so long as the purpose of the present invention is met, and all the changes are within the scope of the present invention without departing from the technical principles and the inventive concept of the present invention.

Claims

1. The utility model provides a special lubrication wear-resisting coating of car windscreen wiper rubber strip restoration which characterized in that:

the two-layer structure material consists of a chloroprene rubber primer material and an epoxy resin top-coating material;

the chloroprene rubber primer material consists of 100 parts of chloroprene rubber, 3-5 parts of 2, 5-dimethyl-2, 5-di-tert-butyl-hexane peroxide or 2, 4-dichloro-benzoyl peroxide, 5-10 parts of low molecular weight polyamide, 1-5 parts of carbon black, 1-3 parts of 2, 6-di-tert-butyl-p-cresol anti-aging agent, and 300-400 parts of mixture formed by any one or more than two of toluene, gasoline and ethyl acetate;

the epoxy resin surface coating material is prepared from 100 parts of at least one of KR202C, KR and KR309 modified by nitrile rubber and KSR-1000 modified by silicone rubber, 5-15 parts of at least one of diethylenetriamine, triethylenetetramine, ethylenediamine, hexamethylenediamine and m-phenylenediamine, 1-3 parts of accelerator, 7-30 parts of graphene-like molybdenum disulfide, 3-25 parts of graphite, 1-8 parts of at least one of zinc oxide and magnesium oxide, 0.5-1 part of dispersing agent calcium stearate and 300-600 parts of any one or a mixture of any two of acetone and methyl ethyl ketone.

2. A method for preparing a special lubricating wear-resistant coating for repairing an automobile wiper strip according to claim 1, which is characterized by comprising the following steps: the neoprene primer coating material and the epoxy resin top coating material are A, B bi-component materials; the preparation of the chloroprene rubber primer material is specifically as follows:

firstly plasticating neoprene in an internal mixer for 5+/-1 min at the processing temperature of not lower than 90 ℃, then adding carbon black and an anti-aging agent, continuing plasticating for 5-10 min, putting the obtained product into a sealed reactor containing a solvent after plasticating, keeping the temperature at 40+/-5 ℃, and stirring for 15-20 min until the rubber is completely dissolved, wherein the obtained mixed glue solution is the component A of the neoprene primer material; mechanically stirring a vulcanizing agent and a cross-linking agent of the chloroprene rubber in a closed container containing a solvent for 3-5 min, and uniformly mixing the mixture to obtain a component B of a chloroprene rubber primer material; the vulcanizing agent of the neoprene is selected from peroxide types, and 2, 5-dimethyl-2, 5-di-tert-butyl peroxyhexane or 2, 4-dichloro peroxybenzoyl is adopted; the cross-linking agent adopts low molecular weight polyamide;

firstly, adding graphene-like molybdenum disulfide, graphite, metal oxide and a dispersing agent into an organic solvent according to a formula proportion of a top coating, and oscillating for at least 10min by an ultrasonic cleaner to obtain a premix; mechanically stirring a rubber modified epoxy resin matrix for 5-10 min under water bath heating at the temperature of not lower than 60 ℃, adding a premix of graphene-like molybdenum disulfide, graphite, metal oxide and a dispersing agent into the epoxy resin, and stirring in a high-speed shearing machine for 10-15 min to obtain a mixed solution which is the component A of the epoxy resin surface coating material; the metal oxide is at least one of zinc oxide and magnesium oxide; the rubber modified epoxy resin matrix adopts at least one of KR202C, KR and KR309 modified by nitrile rubber and KSR-1000 modified by silicone rubber;

stirring the normal-temperature curing agent and the accelerator of the epoxy resin in a closed container containing a solvent for 3-5 min, and mixing the mixture to obtain a component B of the epoxy resin surface coating material; the normal temperature curing agent of the epoxy resin adopts at least one of diethylenetriamine, triethylenetetramine, ethylenediamine, hexamethylenediamine and m-phenylenediamine.

3. The method for preparing the special lubricating wear-resistant coating for repairing the automobile wiper strip according to claim 2, which is characterized by comprising the following steps:

mechanically stirring 3-5 g of vulcanizing agent of chloroprene rubber and 5-10 g of cross-linking agent in a closed container containing 20-70 g of solvent for 3-5 min, and uniformly mixing the mixture to obtain a component B of the chloroprene rubber primer material; and storing the A, B component mixed liquid respectively for standby.

4. The method for preparing the special lubricating wear-resistant coating for repairing the automobile wiper strip according to claim 2, which is characterized by comprising the following steps:

5-15 g of normal temperature curing agent of epoxy resin and 1-3 g of accelerator are stirred for 3-5 min and mixed in a closed container containing 30-100 g of solvent, and the mixed solution is the component B of the epoxy resin surface coating material.

5. The application of the special lubricating wear-resistant coating for repairing the automobile wiper strip according to claim 1, which is characterized in that when the worn wiper strip is repaired, the application method comprises the following steps: