Special coating for automobile steering system structure

Abstract

The invention relates to the technical field of coatings, in particular to a special coating for an automobile steering system structure, which comprises an epoxy resin emulsion component and a curing agent component, and the weight part ratio of the component A to the component B is 3.5: 1; the epoxy resin emulsion comprises the following components: water, Ashlan cellulose, an AMP95 multifunctional additive, modified bentonite, a dispersing agent and a defoaming agent. The coating prepared by the invention can be applied to the surface of a sphere part and a pull rod in an automobile steering system structure, has the effects of rust prevention and attractiveness, meets the technical indexes provided by manufacturers in the aspects of salt mist resistance and adhesive force, and has the advantages of low cost and high practicability. During preparation, the waterborne epoxy resin emulsion is adopted, and the curing agent containing the drier is added after the epoxy resin is emulsified, so that the problem of low drying speed of a waterborne product can be solved, a film can be quickly formed when the environment temperature is 5 DEG C and the humidity is 80%, and the corresponding hardness and adhesive force requirements can be met.

Description

Technical Field

[0001] This invention relates to the field of coating technology, specifically to a special coating for automotive steering system structures. Background Technology

[0002] As a crucial transmission system in vehicles, the steering system is susceptible to fatigue and eventual component fracture if localized corrosion occurs. Therefore, the protective coating for the steering system requires high levels of weather resistance and corrosion resistance. This is especially true for off-road vehicle steering systems, which demand exceptional corrosion resistance after salt spray and weathering tests. For example, relevant international standards require a secondary salt spray test of at least 500 hours after a 1000-hour weathering test, with no significant discoloration, chalking, loss of gloss, or increased gloss, and no significant changes in mechanical properties after the test.

[0003] Currently, the industry primarily uses oil-based epoxy solutions, which have inherent advantages in drying speed and adhesion to substrates. However, while oil-based coatings possess high hardness, they are also brittle, prone to flaking during daily use. Furthermore, with the national push for water-based coatings, they are gradually becoming less environmentally friendly. Therefore, we have proposed a specialized coating for automotive steering system structures to address these issues. Summary of the Invention

[0004] The purpose of this invention is to provide a special coating for automotive steering system structures, which can provide rust prevention and aesthetic effects, and has excellent salt spray resistance and adhesion.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a special coating for automotive steering system structure, comprising an epoxy resin emulsion component and a curing agent component, wherein the weight ratio of component A to component B is 3.5:1;

[0006] The epoxy resin emulsion composition includes the following raw materials: 130kg-135kg water, 0.1kg-1kg Ashland cellulose, 0.05kg-0.2kg AMP95 multifunctional additive, 0.1kg-1kg modified bentonite, 10kg-15kg dispersant, 1kg-3kg defoamer, 50kg-70kg golden red titanium dioxide, 160kg-170kg precipitated barium sulfate, 40kg-60kg zinc sulfate, 350kg-360kg waterborne epoxy emulsion, 15kg-20kg black paste, 3kg-8kg anti-flash rust additive, 1kg-3kg waterborne leveling agent, 1kg-5kg waterborne wetting agent, 20kg-25kg DPnB film-forming aid, 20kg-22kg BCS film-forming aid, and 1kg-5kg polyurethane thickener;

[0007] The curing agent components include the following raw materials: 118kg-122kg of water-based curing agent, 110kg-120kg of water, and 1kg-3kg of drying agent.

[0008] Preferably, the epoxy resin emulsion component comprises the following raw materials: 131.1 kg water, 0.5 kg Ashland cellulose, 0.1 kg AMP95 multifunctional additive, 0.5 kg modified bentonite, 13.5 kg dispersant, 2 kg defoamer, 60 kg golden red titanium dioxide, 165 kg precipitated barium sulfate, 50 kg zinc sulfate, 352.1 kg waterborne epoxy emulsion, 18 kg black paste, 5 kg anti-flash rust additive, 2 kg waterborne leveling agent, 3 kg waterborne wetting agent, 5.6 kg DPnB film-forming aid, 21.1 kg BCS film-forming aid, and 3 kg polyurethane thickener;

[0009] The curing agent components include the following raw materials: 120.4 kg of water-based curing agent, 114.6 kg of water, and 2 kg of drying agent.

[0010] Preferably, the preparation method of component A includes the following steps:

[0011] S1: First, grind the Ashland cellulose, AMP95 multifunctional additive, modified bentonite, dispersant, defoamer, golden red titanium dioxide, precipitated barium sulfate and zinc sulfate in the raw materials to below 10μm;

[0012] S2. Add the ground Ashland cellulose, AMP95 multifunctional additive, modified bentonite, dispersant, defoamer, golden red titanium dioxide, precipitated barium sulfate and zinc sulfate to the mixture of waterborne epoxy emulsion, black paste, anti-flash rust additive, waterborne leveling agent, waterborne wetting agent, DPnB film-forming aid, BCS film-forming aid and polyurethane thickener and stir to mix.

[0013] Preferably, the curing agent component is mixed after the epoxy resin emulsion component has been emulsified.

[0014] Preferably, the amount of curing agent component added is calculated using the following formula: Curing agent amount = (0.65~0.85) × epoxy value × active hydrogen equivalent.

[0015] Preferably, in the calculation formula, the epoxy value = 100 ÷ epoxy equivalent, and the epoxy equivalent = 100% epoxy equivalent ÷ solid content.

[0016] Preferably, the water-based leveling agent is BYK-333 water-based leveling agent.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The coating prepared by this invention can be applied to the ball joint and tie rod surfaces in automotive steering systems, providing rust prevention and aesthetic benefits. Furthermore, it meets the manufacturer's technical specifications regarding salt spray resistance and adhesion. The coating is prepared using a water-based epoxy resin emulsion, with a curing agent containing a drier added after the epoxy resin emulsification. This overcomes the slow drying speed of water-based products and allows for rapid film formation even at an ambient temperature of 5°C and humidity of 80%, achieving the required hardness and adhesion. Attached Figure Description Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The technical solution provided by this invention is as follows:

[0021] A special coating for automotive steering system structure, comprising an epoxy resin emulsion component and a curing agent component, wherein the weight ratio of component A to component B is 3.5:1;

[0022] The epoxy resin emulsion composition includes the following raw materials: 130kg-135kg water, 0.1kg-1kg Ashland cellulose, 0.05kg-0.2kg AMP95 multifunctional additive, 0.1kg-1kg modified bentonite, 10kg-15kg dispersant, 1kg-3kg defoamer, 50kg-70kg golden red titanium dioxide, 160kg-170kg precipitated barium sulfate, 40kg-60kg zinc sulfate, 350kg-360kg waterborne epoxy emulsion, 15kg-20kg black paste, 3kg-8kg anti-flash rust additive, 1kg-3kg waterborne leveling agent, 1kg-5kg waterborne wetting agent, 20kg-25kg DPnB film-forming aid, 20kg-22kg BCS film-forming aid, and 1kg-5kg polyurethane thickener;

[0023] The curing agent components include the following raw materials: 118kg-122kg of water-based curing agent, 110kg-120kg of water, and 1kg-3kg of drying agent.

[0024] Specifically, the epoxy resin emulsion components include the following raw materials: 131.1 kg water, 0.5 kg Ashland cellulose, 0.1 kg AMP95 multifunctional additive, 0.5 kg modified bentonite, 13.5 kg dispersant, 2 kg defoamer, 60 kg golden red titanium dioxide, 165 kg precipitated barium sulfate, 50 kg zinc sulfate, 352.1 kg waterborne epoxy emulsion, 18 kg black paste, 5 kg anti-flash rust additive, 2 kg waterborne leveling agent, 3 kg waterborne wetting agent, 5.6 kg DPnB film-forming aid, 21.1 kg BCS film-forming aid, and 3 kg polyurethane thickener;

[0025] The curing agent components include the following raw materials: 120.4 kg of water-based curing agent, 114.6 kg of water, and 2 kg of drying agent.

[0026] Specifically, the preparation method of component A includes the following steps:

[0027] S1: First, grind the Ashland cellulose, AMP95 multifunctional additive, modified bentonite, dispersant, defoamer, golden red titanium dioxide, precipitated barium sulfate and zinc sulfate in the raw materials to below 10μm;

[0028] S2. Add the ground Ashland cellulose, AMP95 multifunctional additive, modified bentonite, dispersant, defoamer, golden red titanium dioxide, precipitated barium sulfate and zinc sulfate to the mixture of waterborne epoxy emulsion, black paste, anti-flash rust additive, waterborne leveling agent, waterborne wetting agent, DPnB film-forming aid, BCS film-forming aid and polyurethane thickener and stir to mix.

[0029] As can be seen from the above description, grinding can reduce the particle size of solid substances in raw materials, making the prepared coating more lubricating, and grinding before mixing makes the grinding effect even better.

[0030] Specifically, the curing agent component is mixed after the epoxy resin emulsion component is emulsified.

[0031] Specifically, the amount of curing agent component added is calculated using the following formula: Curing agent dosage = (0.65~0.85) × epoxy value × active hydrogen equivalent.

[0032] Specifically, in the calculation formula, the epoxy value = 100 ÷ epoxy equivalent, and the epoxy equivalent = 100% epoxy equivalent ÷ solid content.

[0033] Specifically, the water-based leveling agent is BYK-333 water-based leveling agent.

[0034] As can be seen from the above description, the BYK-333 water-based leveling agent has excellent substrate lubrication and leveling properties, good water solubility and oil solubility, and can also prevent the formation of defects such as pinholes and orange peel, while also improving the adhesion of the coating.

[0035] Embodiment 1 of the present invention is as follows:

[0036] A special coating for automotive steering system structure, comprising an epoxy resin emulsion component and a curing agent component, wherein the weight ratio of component A to component B is 3.5:1;

[0037] The epoxy resin emulsion components include the following raw materials: 131.1 kg water, 0.5 kg Ashland cellulose, 0.1 kg AMP95 multifunctional additive, 0.5 kg modified bentonite, 13.5 kg dispersant, 2 kg defoamer, 60 kg golden red titanium dioxide, 165 kg precipitated barium sulfate, 50 kg zinc sulfate, 352.1 kg waterborne epoxy emulsion, 18 kg black paste, 5 kg anti-flash rust additive, 2 kg BYK-333 waterborne leveling agent, 3 kg waterborne wetting agent, 5.6 kg DPnB film-forming aid, 21.1 kg BCS film-forming aid, and 3 kg polyurethane thickener;

[0038] The curing agent components include the following raw materials: 120.4 kg of water-based curing agent, 114.6 kg of water, and 2 kg of drying agent.

[0039] Among them, polyurethane thickeners mainly play a role in changing the rheological properties of the system, increasing viscosity, providing medium to high shear viscosity to improve construction, and providing low shear viscosity to avoid sagging.

[0040] Furthermore, the water-based curing agent used is Q69 water-based amine curing agent, a highly reactive water-based curing agent with a solid content of 51%. Q69 water-based amine curing agent, together with water-based epoxy resin, is designed to form an ultra-low VOC water-based epoxy coating with excellent gloss stability, which can meet various construction processes such as spraying and splattering.

[0041] Furthermore, in the preparation of epoxy resin emulsion, Ashland cellulose, AMP95 multifunctional additive, modified bentonite, dispersant, defoamer, golden red titanium dioxide, precipitated barium sulfate, and zinc sulfate in the raw materials are first ground to below 10μm; then, the ground Ashland cellulose, AMP95 multifunctional additive, modified bentonite, dispersant, defoamer, golden red titanium dioxide, precipitated barium sulfate, and zinc sulfate are added to a mixture of waterborne epoxy emulsion, black paste, anti-flash rust additive, waterborne leveling agent, waterborne wetting agent, DPnB film-forming aid, BCS film-forming aid, and polyurethane thickener and stirred and mixed.

[0042] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special coating for automotive steering system structures, characterized in that: It includes an epoxy resin emulsion component and a curing agent component, wherein the weight ratio of component A to component B is 3.5:1; The epoxy resin emulsion composition includes the following raw materials: 130kg-135kg water, 0.1kg-1kg Ashland cellulose, 0.05kg-0.2kg AMP95 multifunctional additive, 0.1kg-1kg modified bentonite, 10kg-15kg dispersant, 1kg-3kg defoamer, 50kg-70kg golden red titanium dioxide, 160kg-170kg precipitated barium sulfate, 40kg-60kg zinc sulfate, 350kg-360kg waterborne epoxy emulsion, 15kg-20kg black paste, 3kg-8kg anti-flash rust additive, 1kg-3kg waterborne leveling agent, 1kg-5kg waterborne wetting agent, 20kg-25kg DPnB film-forming aid, 20kg-22kg BCS film-forming aid, and 1kg-5kg polyurethane thickener; The curing agent components include the following raw materials: 118kg-122kg of water-based curing agent, 110kg-120kg of water, and 1kg-3kg of drying agent.

2. The special coating for automotive steering system structures according to claim 1, characterized in that: The epoxy resin emulsion component includes the following raw materials: Water 131.1 kg, Ashland cellulose 0.5 kg, AMP95 multifunctional additive 0.1 kg, modified bentonite 0.5 kg, dispersant 13.5 kg, defoamer 2 kg, golden red titanium dioxide 60 kg, precipitated barium sulfate 165 kg, zinc sulfate 50 kg, waterborne epoxy emulsion 352.1 kg, black paste 18 kg, anti-flash rust additive 5 kg, waterborne leveling agent 2 kg, waterborne wetting agent 3 kg, DPnB film-forming aid 5.6 kg, BCS film-forming aid 21.1 kg, polyurethane thickener 3 kg; The curing agent components include the following raw materials: 120.4 kg of water-based curing agent, 114.6 kg of water, and 2 kg of drying agent.

3. The special coating for automotive steering system structures according to claim 1, characterized in that: The preparation method of component A includes the following steps: S1: First, grind the Ashland cellulose, AMP95 multifunctional additive, modified bentonite, dispersant, defoamer, golden red titanium dioxide, precipitated barium sulfate and zinc sulfate in the raw materials to below 10μm; S2. Add the ground Ashland cellulose, AMP95 multifunctional additive, modified bentonite, dispersant, defoamer, golden red titanium dioxide, precipitated barium sulfate and zinc sulfate to the mixture of waterborne epoxy emulsion, black paste, anti-flash rust additive, waterborne leveling agent, waterborne wetting agent, DPnB film-forming aid, BCS film-forming aid and polyurethane thickener and stir to mix.

4. The special coating for automotive steering system structures according to claim 1, characterized in that: The curing agent component is mixed after the epoxy resin emulsion component is emulsified.

5. The special coating for automotive steering system structures according to claim 1, characterized in that: The amount of curing agent component added is calculated using the following formula: Curing agent dosage = (0.65~0.85) × epoxy value × active hydrogen equivalent.

6. The special coating for automotive steering system structures according to claim 5, characterized in that: In the calculation formula, the epoxy value = 100 ÷ epoxy equivalent, and the epoxy equivalent = 100% epoxy equivalent ÷ solid content.

7. The special coating for automotive steering system structures according to claim 1, characterized in that: The water-based leveling agent is BYK-333 water-based leveling agent.