Water-based polyurethane anti-corrosion coating

Water   Based   Poly   Urethane   Ester   Top   Coat

I. Product Introduction ：

Water-based polyurethane topcoat is an environmentally friendly high-performance coating, primarily composed of water-based polyurethane resin, functional fillers, decorative pigments, additives, and other components. Its features include excellent weather resistance, strong color and gloss retention, strong adhesion, high decorativeness, and resistance to various solvents and corrosive media.

II. Product Features:

1. Water-based and Environmentally Friendly: Water-based polyurethane topcoat uses water as a thinner, has no irritating odor, is non-flammable and non-explosive, causes no air pollution, and poses no harm to the environment and human health.

2. High Weather Resistance: The paint film of this topcoat has good weather resistance in outdoor environments, can long-term resist UV radiation, and will not chalk, discolor, or lose gloss.

3. Strong Color and Gloss Retention: The paint film of water-based polyurethane topcoat has good color and gloss retention properties, is not prone to discoloration or loss of gloss, and can maintain the decorative effect of the coating for a long time.

4. Strong Adhesion : The paint film has strong adhesion, firmly bonds with the primer or intermediate coat, and is not easy to peel off.

5. High Decorativeness: Water-based polyurethane topcoat can be formulated in various colors, has high film gloss, good fullness, and excellent decorative effect.

6. Resistance to various solvents, corrosive media, etc.: The component coating of water-based polyurethane topcoat has high crosslinking density, strong corrosion resistance of the paint film, can resist erosion from most solvents, acids, alkalis, salts, and other solvents, and provides strong protection to the substrate.

Water-based polyurethane topcoat features water-based environmental friendliness, high weather resistance, strong color and gloss retention, strong adhesion, high decorativeness, and resistance to various solvents and corrosive media, making it an excellent water-based topcoat. Its paint film possesses good gloss, fullness, hardness, abrasion resistance, impact resistance, chemical resistance, and anti-corrosion properties, effectively protecting the substrate and extending its service life.

III. Technical Specifications ：

IV. Scope of Application ：

Firstly, waterborne polyurethane topcoat is often used for coating various metal surfaces, such as steel structures, bridges, ships, petrochemical equipment, etc. Its paint film has excellent weather resistance, corrosion resistance, wear resistance, and impact resistance, which can effectively protect metal substrates, extend their service life, and give them a good appearance and decorative effect.

Secondly, waterborne polyurethane topcoat is also suitable for surface coating of materials such as wood and plastic. On wooden products like furniture, doors and windows, and flooring, waterborne polyurethane topcoat can provide a tough, glossy paint film, enhancing the product's aesthetics and durability. At the same time, it also has excellent water resistance, stain resistance, and scrub resistance, making daily cleaning and maintenance convenient.

In addition, waterborne polyurethane topcoat can also be applied in some special occasions, such as floor coatings, automotive coatings, etc. In floor coatings, waterborne polyurethane topcoat has good wear resistance, compression resistance, and slip resistance, making it suitable for industrial workshops, garages, hospitals, and other places. In automotive coatings, waterborne polyurethane topcoat can provide a paint film with high gloss and high fullness, making the car's appearance more brilliant and long-lasting.

In summary, waterborne polyurethane topcoat is widely used in coating various materials and occasions due to its non-toxic and environmentally friendly nature, tough paint film, high gloss, good adhesion, wear resistance, compression resistance, corrosion resistance, oil resistance, and water resistance. Its application fields are continuously expanding, and market demand is also steadily growing.

Waterborne polyurethane topcoat can be applied to the surface coating of indoor and outdoor metal, wood, plastic, and other materials, such as steel structure bridges, iron towers, ships, petrochemical equipment, storage tanks, pipelines, building exterior walls, aluminum alloy doors and windows, etc.

V. Construction Process and Steps:

Preparation Before Construction:

1. Environmental Requirements: Ensure the construction environment is clean, dry, well-ventilated, and at a suitable temperature. Avoid working in harsh environments such as high temperature, high humidity, or strong wind. The ambient temperature during construction should be controlled between 5-35 ℃, and humidity should not exceed 85%。

2. Substrate Treatment: Select appropriate treatment methods based on the substrate material and surface condition, such as sanding, rust removal, cleaning, etc., to ensure the substrate surface is flat, free of oil stains, and dust-free.

3. Coating Interval: Determine appropriate coating intervals based on the coating type and substrate condition to avoid issues like lifting or sagging between coats.

4. Stir Evenly: Before use, the paint should be thoroughly stirred to avoid sedimentation, stratification, and other phenomena.

5. Preparation of Construction Tools: Prepare necessary tools such as spray guns, rollers, and brushes, ensuring they are clean and free of oil stains.

Paint Preparation:

1. Inspect Paint: Check if the packaging of the waterborne polyurethane topcoat is intact, without damage or leakage, and confirm information such as paint model, color, and production date.

2. Dilute Paint: According to construction needs, mix the waterborne polyurethane topcoat evenly with the thinner according to the specified dilution ratio. Be careful to avoid excessive thinner which can lead to paint sagging, poor drying, and other problems.

3. Filter Paint: Use a fine filter screen to filter the prepared paint, removing impurities, particulate matter, etc., to ensure paint quality.

Construction Operation:

1. Application Method: Select an appropriate application method based on the substrate material and surface condition, such as spraying, rolling, or brushing, to ensure uniform and complete coverage of the paint.

2. Number of Coats: Determine the appropriate number of coats based on construction requirements and paint performance. Generally, at least two coats are required to ensure that the coating thickness, gloss, etc., meet the requirements.

3. Construction Interval: Strictly control the interval time between each coat according to the requirements in the paint's instructions, to avoid issues such as poor drying or wrinkling of the coating.

  Primer Application: After stirring the primer evenly, follow the principle of difficult-to-easy: first use a spray gun to coat corners and edges, then use a brush or roller to uniformly coat large areas. After the primer application is complete, check if the coating is uniform and without missed spots.

  Intermediate Coat Application: After the primer is dry, apply the intermediate coat. The method for applying the intermediate coat is the same as for the primer, paying attention to maintaining uniform coating thickness.

  Topcoat Application: After the intermediate coat is dry, apply the topcoat. The topcoat application should ensure the coating is smooth, flat, free of bubbles, sagging, and other defects.

Construction Quality Inspection and Acceptance:

1. Appearance Inspection: Check if the coating surface is flat, smooth, free of bubbles, sagging, missed spots, and other defects.

2. Thickness Measurement: Use a coating thickness gauge to measure the coating thickness, ensuring it meets construction requirements.

3. Gloss Measurement: Use a gloss meter to measure the coating gloss, ensuring it meets design requirements.

4. Hardness Measurement: Use a hardness tester to measure the coating hardness, ensuring it meets usage requirements.

VI. Storage and Safety Protection ：

Storage Instructions and Precautions:

1. Store in a cool, dry place, away from direct sunlight and high temperatures.

2. Keep packaging containers sealed to prevent moisture and impurities from entering.

3. Use the product as soon as possible after opening to avoid prolonged exposure to air.

4. Keep away from fire, no smoking.

Safety Measures and Environmental Protection Requirements:

1. During construction, wear protective clothing, gloves, and glasses to avoid direct contact with skin and eyes.

2. Ensure good ventilation in the construction environment to avoid prolonged inhalation of paint volatile substances.

3. After construction, dispose of waste paint and packaging containers properly, in accordance with local environmental protection requirements.

4. In case of paint leakage or contamination, take immediate measures for cleanup and disposal.