Single-component paint for a sealing profile of a vehicle

Abstract

One-component coating for a sealing profile of a vehicle, comprising one or more of the following substances: a water-based polyurethane resin, a water-based polyacrylic resin, a water-based epoxy resin, a polyorganic silicone dispersion and a blocked isocyanate curing agent, further comprising a film-forming aid, further comprising the following components in the specified proportions: Water-based polyurethane resin 25-45% Water-based polyacrylic resin 20-30% Water-based epoxy resin 15-25% Polyorganic silicone dispersion 5-30% Blocked isocyanate curing agent 5-30% Film education aids 3-15%; and further comprising the following components in the specified proportions: wetting agent 0.1-2% Equalizing agent 0.1-2% Dispersing agent 0.1-3% Defoaming agent 0.1-2% Organosilicon 0.5-5% Organic fluorine 0.1-5% Color paste 1-5% Thickener 1-3% UV absorber 0.1-1%.

Description

Technical field

[0001] The invention relates to a paint for vehicles and in particular to a single-component paint for a sealing profile of a vehicle. State of the art

[0002] With the increasing prevalence of vehicles in Chinese society and households, diagnosing mechanical malfunctions during vehicle use is crucial to identifying their causes and implementing appropriate repairs. Various mechanical failures significantly impact driving safety and vehicle efficiency, and in severe cases, pose a serious threat to driver safety and the lives and property of others. Therefore, it is essential for both maintenance personnel and drivers to accurately analyze and diagnose the causes of mechanical vehicle failures to improve vehicle safety and efficiency, and to better meet production and service life requirements.

[0003] An abnormal noise is a relatively common mechanical failure in a car. When this type of failure occurs, the driver may hear a dull or sharp noise from the engine, or other parts may make a noise due to abnormal friction. Such abnormal noises sometimes occur alternately at a certain frequency or interval, or at times without any regularity.

[0004] According to statistics, approximately 70% of mechanical vehicle malfunctions involve an abnormal noise. Therefore, diagnosing mechanical vehicle malfunctions by listening is very practical. With prolonged vehicle use and accelerated wear of mechanical parts, the gaps between components increase during braking, often leading to unusual noises. By listening for these unusual noises, it's possible to determine if the vehicle is running smoothly. Based on the characteristics of the abnormal noise, such as whether it's continuous, regular, or intermittent, the location of the fault can generally be determined.

[0005] Generally, various parts, such as the guide grooves for car windows, door frames, trunks, or sunroofs, cause abnormal noises. To eliminate these noises, the common solution is to use plastic or rubber sealing profiles or sponge profiles to fill the gap and reduce the car's noise. However, reduction does not mean elimination. These dynamic abnormal noises still occur while driving, and the problem cannot be completely solved simply by using sealing profiles or sponge profiles.

[0006] German patent application DE 102 18 866 A1 discloses the use of an aqueous coating composition for the production of surface coatings for seals. Patent application CN 1 06 497 379 A describes a water-based, refractory, one-component coating. Content of the present invention

[0007] Therefore, the object of the present invention is to provide a one-component coating for a sealing profile of a vehicle that solves the problem of abnormal noises in the state of vehicle movement and can improve the feel of the coating surface and the sliding sensation.

[0008] The technical solutions are: The one-component coating for a vehicle sealing profile comprises one or more water-based polyurethane resins, a water-based polyacrylic resin, a water-based epoxy resin, a polyorganic silicone dispersion, and a blocked isocyanate curing agent.

[0009] The technical solution of the present invention is implemented in the form of a single component, and the blocked isocyanate curing agent is a latent curing method. One or more of the water-based polyurethane resins, water-based polyacrylic resins, and water-based epoxy resins are all water-based polymer emulsions, and preferably a combination of the three. The polymer latex particles of the three can interact to form a continuous resin film that can be latently cured with a blocked isocyanate curing agent, i.e., exhibits a certain degree of storage stability at room temperature in a single-component system consisting of this.

[0010] Polyorganosilicon dispersions are ultra-high molecular weight silicone polymers that can improve the feel and smoothness of painted surfaces. Commercially available polyorganosilicon dispersions include Dow Corning DC-51. These dispersions can reduce the coefficient of friction of the painted surface, prevent blockage, improve wear resistance, and also enhance the feel and slip resistance of the painted surface.

[0011] Furthermore, the one-component coating for a vehicle sealing profile includes a film-forming agent.

[0012] Water-based polyurethane resin, water-based polyacrylic resin, and water-based epoxy resin are all film-forming substances. The addition of film-forming aids can enhance the film-forming mechanism and significantly improve film-forming quality, including a significant improvement in adhesion and bond strength.

[0013] To improve film formation, adhesion, and bond strength, the preferred weight percentage of water-based polyurethane resin, water-based polyacrylic resin, water-based epoxy resin, polyorganosilicone dispersion, and film-forming aid is selected through testing. The percentage is selected as follows: Water-based polyurethane resin 25-45% Water-based polyacrylic resin 20-30% Water-based epoxy resin 15-25% Polyorganic silicone dispersion 5-30% Blocked isocyanate curing agent 5-30% Film education aids 3-15%, wherein the film-forming aid may preferably be dipropylene glycol butyl ether.

[0014] To enhance the performance and stability of the paint, additives can be selected to improve its properties. For example, one or more additives such as a wetting agent, leveling agent, dispersant, defoaming agent, organosilicon, organic fluorine, color paste, thickener, and UV absorber may be added. It may be preferable to include all additives. The one-component paint for a vehicle sealing profile also contains a wetting agent, leveling agent, dispersant, defoaming agent, organosilicon, organic fluorine, color paste, thickener, and UV absorber.

[0015] To improve the effectiveness of the aid, the respective weight proportions of the ingredients were tested in several trials. The proportion of the aid is as follows: wetting agent 0.1-2% Equalizing agent 0.1-2% Dispersing agent 0.1-3% Defoaming agent 0.1-2% Organosilicon 0.5-5% Organic fluorine 0.1-5% Color paste 1-5% Thickener 1-3% UV absorber 0.1-1%.

[0016] Of course, the UV absorber can also be replaced by an antioxidant. The organosilicon is a silicone resin or a silane adhesion promoter. The organic fluorine is a fluorine-containing olefin. The color paste is preferably black.

[0017] The manufacturing process of the single-component coating for a vehicle sealing profile includes the following steps: (1) Predispersing organosilicon, organic fluorine powder and water according to a predetermined number of revolutions and portions; (2) Then the water-based polyurethane resin, the water-based acrylic resin, the water-based epoxy resin and the polyorganosilicone dispersion are added in the correct order and stirred and dispersed in a mixing vessel; (3) Addition of film-forming agents, wetting agents, leveling agents, dispersing agents, defoaming agents, colour paste, thickening agents and UV absorbers for stirring and dispersing; (4) Add blocking isocyanate hardener and water, stir and disperse.

[0018] During application, the coating is sprayed onto a rubber substrate, such as glass guide grooves, door frame sponge profiles, trunk seal profiles, and sunroof seal profiles, etc., of a vehicle and baked on. Once the reaction is complete, the coating can eliminate the dynamic abnormal noise of the seal on the vehicle and can improve the feel and sliding sensation of the coated surface.

[0019] In this way, a coating is formed on the rubber substrate. After the water-based polyurethane resin, the water-based polyacrylic resin, the water-based epoxy resin, the blocked isocyanate curing agent, and the film-forming aid have been heated and formed into a film, the coating exhibits abrasion resistance, weather resistance, and good adhesion and bond strength. The polyorganic silicone dispersion smooths the coating surface and creates a smooth feel.

[0020] The addition of a wetting agent can reduce the surface tension of the rubber carrier material; the addition of an equalizing agent can increase the uniformity of the coating; dispersants increase the uniformity of the paint; the addition of an antifoaming agent can eliminate bubbles in the paint during stirring; the addition of organosilicon can improve the wear resistance of the paint; the addition of organic fluorine can reduce the surface tension of the paint; the addition of black color paste can further improve the weather resistance of the paint; the addition of thickeners can increase the density and viscosity of the paint; the addition of UV absorbers can further improve the weather resistance and stability of the coating.

[0021] The advantageous effects of the present invention are: After spraying the one-component coating for a sealing profile of a vehicle according to the present invention onto a rubber substrate, such as glass guide grooves, door frame sponge profiles, trunk sealing profiles, sunroof sealing profiles, etc., of a vehicle, and after curing and reaction, the noise level is tested. The test results are all recorded in the noise unit "SONE". By eliminating the abnormal noise that occurs during vehicle movement, the coating can improve the feel and sliding characteristics of the coated surface.

[0022] The one-component coating for a sealing profile of a vehicle according to the present invention is suitable for the field of surface coating of rubber seals for vehicles, including, but not limited to, sealing profiles for glass panes / sponge strips, coatings for sunroofs and coatings for sealing profiles for trunks of the vehicle. Detailed descriptions

[0023] The technical solution of the present invention is described below with reference to preferred embodiments, but the scope of protection claimed by the present invention is not limited thereto. Example 1

[0024] The single-component coating for a sealing profile of a vehicle of this embodiment consists of the following components and weight proportions: Water-based polyurethane resin 25% Water-based polyacrylic resin 20% Water-based epoxy resin 15% Polyorganic silicone dispersion 5% Blocked isocyanate curing agent 5% Film education aids 3% wetting agent 0.1% Equalizing agent 0.1% Dispersing agent 0.1% Defoaming agent 0.1% Organosilicon 0.5% Organic fluorine 0.1% Color paste 1% Thickener 1% UV absorber 0.1% Water Remaining quantity

[0025] The manufacturing process of a single-component coating for a vehicle sealing profile includes the following steps: (1) Predispersing organosilicon, organic fluorine powder and water according to a predetermined number of revolutions and portions; (2) Then the water-based polyurethane resin, the water-based acrylic resin, the water-based epoxy resin and the polyorganosilicone dispersion are added in the correct order and stirred and dispersed in a mixing vessel; (3) Addition of film-forming agents, wetting agents, leveling agents, dispersing agents, defoaming agents, colour paste, thickening agents and UV absorbers for stirring and dispersing; (4) Add blocking isocyanate hardener and water, stir and disperse. Example 2

[0026] Referring to Example 1, the one-component paint for a sealing profile of a vehicle in this example consists of the following components and weight proportions: Water-based polyurethane resin 28% Water-based polyacrylic resin 23% Water-based epoxy resin 17% Polyorganic silicone dispersion 8% Blocked isocyanate curing agent 8% Film education aids 5% wetting agent 0.5% Equalizing agent 0.4% Dispersing agent 0.4% Defoaming agent 0.3% Organosilicon 0.5% Organic fluorine 0.4% Color paste 2% Thickener 2% UV absorber 0.2% Water Remaining quantity Example 3

[0027] Referring to Example 1, the one-component paint for a sealing profile of a vehicle in this example consists of the following components and weight proportions: Water-based polyurethane resin 30% Water-based polyacrylic resin 22% Water-based epoxy resin 15% Polyorganic silicone dispersion 6% Blocked isocyanate curing agent 9% Film education aids 6% wetting agent 0.8% Equalizing agent 0.7% Dispersing agent 0.5% Defoaming agent 0.4% Organosilicon 0.4% Organic fluorine 0.6% Color paste 0.7% Thickener 1% UV absorber 0.2% Water Remaining quantity

[0028] The one-component coating produced in examples 1 to 3 above for a vehicle sealing profile was sprayed and baked onto a rubber substrate, such as glass guide grooves, door frame sponge profiles, trunk sealing profiles, and sunroof sealing profiles. After the reaction was complete, the volume of abnormal noise from the vehicle while in motion was tested. The test results are all recorded in the noise unit "SONE". By eliminating the abnormal noise that occurs during vehicle movement, the coating can also improve the feel and sliding characteristics of the coated surface.

Claims

[1] One-component coating for a sealing profile of a vehicle, comprising one or more of the following: a water-based polyurethane resin, a water-based polyacrylic resin, a water-based epoxy resin, a polyorganic silicone dispersion and a blocked isocyanate curing agent, further comprising a film-forming aid, further comprising the following components in the specified proportions: Water-based polyurethane resin 25-45% Water-based polyacrylic resin 20-30% Water-based epoxy resin 15-25% Polyorganic silicone dispersion 5-30% Blocked isocyanate curing agent 5-30% Film education aids 3-15%; and further comprising the following components in the specified proportions: wetting agent 0.1-2% Equalizing agent 0.1-2% Dispersing agent 0.1-3% Defoaming agent 0.1-2% Organosilicon 0.5-5% Organic fluorine 0.1-5% Color paste 1-5% Thickener 1-3% UV absorber 0.1-1%. [2] One-component coating for a sealing profile of a vehicle according to claim 1, characterized by that the film-forming aid is dipropylene glycol butyl ether. [3] One-component coating for a sealing profile of a vehicle according to claim 1, characterized by that organosilicon is a silicone resin or a silane adhesion promoter. [4] One-component coating for a sealing profile of a vehicle according to claim 1, characterized by, that organic fluorine is a fluorine-containing olefin. [5] One-component coating for a sealing profile of a vehicle according to claim 1, characterized by that the color paste is a black color paste. [6] One-component coating for a sealing profile of a vehicle according to claim 1, characterized by that the defoaming agent is an organosilicon defoaming agent or a mineral oil defoaming agent.