PPG NOVAGUARD 4801 Two-component Glass-flake-reinforced (Linear) Phenolic Vinyl Ester Coating

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Introduction

A two-component glass flake reinforced (linear) phenolic vinyl ester coating.

Key properties

• A high-performance special coating for newbuild projects or anti-corrosion of old steel structures.
• Under high-temperature environments, the coating still has excellent chemical resistance.
• Excellent acid resistance (various inorganic and organic acids).
• Good resistance to a wide range of solvents.
• Suitable for high-temperature immersion environments.

Colour and gloss

• White.
• Flat.

Basic data 20 °C (68 °F)

Parameters after mixing

0.5 m²/L at 1500 µm (21 ft²/US gal at 60.0 mils).

Notes

• Due to different environmental conditions and its specific reaction mechanism, the film shrinkage after curing may be up to 20%.
• If the storage temperature changes frequently between cold and hot, the effective shelf life will usually be shortened.
• See the supplementary data sheet — theoretical spreading rate versus dry film thickness table.
• See supplementary parameters — recoat interval table.
• See supplementary parameters table — curing time table.

Recommended substrate condition and temperature

Bare steel

• Bare steel: abrasive blast clean to Sa 2½ per ISO 8501-1 or SP10 per SSPC, roughness 50–75 µm (2.0–3.0 mils).

Substrate Temperature

• During application and curing, the substrate temperature should be above 10 °C (50 °F)
• During application and curing, the substrate temperature must be at least 3 °C (5 °F) above the dew point.

Instructions for use

Mixing ratio by volume: Base : Initiator = 49:1

• A violent exothermic reaction will occur between the base component and the initiator; therefore, strictly control and precisely mix according to the specified ratio, and never deviate.
• Use an air-driven mixer at medium speed to stir the base component separately and mix it uniformly in the drum beforehand.
• When adding the initiator, keep stirring the base continuously.
• Mix thoroughly before application.

Application

• Never add any thinner to vinyl ester glass flake 4801 at any time.
• Never stop stirring during the initiator addition.
• Never over-add the initiator at any time.

Notes

• The pot life basically depends on the surface temperature.

Airless spray (single-feed pump)

• Airless high-pressure spray pump with a pressure ratio of 45:1 or higher, leather fittings or PTFE seals, remove the liquid filter, 10 mm (0.375 in) nylon-lined hose, 0.6–1.5 mm (0.024–0.059 in) large-bore rotary cleaning nozzle.
• Recommended standard nozzle: bore 0.75–0.85 mm, fan angle 45°.
• The nozzle bore size and fan angle vary with the structure and shape of the workpiece.
• Adjust pressure (approx. 200 atm) according to hose length and working conditions.

Cleaning solvent

• THINNER 50-02

Supplementary parameters

Film thickness and theoretical spreading rate

Overcoating time for a coating with a dry film thickness of 1000 µm (4.0 mils)

Notes

• In high-temperature environments or prolonged sunlight exposure, the maximum overcoating interval will be significantly shortened.
• Overcoating beyond the maximum overcoating interval will significantly reduce intercoat adhesion with the subsequent coat.
• Do not use styrene to restore the surface activity of this product's coating, otherwise intercoat adhesion may be damaged.
• Before recoating, ensure the surface is clean, dry and free of all contaminants.

Curing time for a 1500 µm (60.0 mil) dry film thickness

Notes

• Adequate and continuous ventilation must be maintained during application and curing of the coating.

Safety Precautions

• Improper use and handling may harm health and cause fire or explosion; see the relevant safety precautions in the product data sheet/application guide and Material Safety Data Sheet.
• Although solvent-free, the coating must be handled with care; avoid inhaling spray mist and contact of uncured paint with skin and eyes.
• The initiator component of this kit is independently canned in a small polyethylene bottle, and can only be mixed with the coloured base component before use.
• The initiator component is a peroxide, very reactive; therefore it is flammable and thermally unstable, and can accelerate its own decomposition reaction.
• It is also a strong oxidizer, reacting violently with some organic chemicals.
• Keep the product packaging intact, and strictly control the ambient temperature within preset limits, and prevent contact/contamination with surrounding items and materials; minimize the on-site storage of the initiator - only enough for the current work at hand.
• Waste from this product should be handled with special care; consult PPG's field technical representative for more information.

Worldwide applicability

Although PPG Protective & Marine Coatings is committed to providing completely consistent products to users worldwide, from time to time it may be necessary to make minor adjustments to specific products to comply with local/national regulations or environmental requirements. In the following cases, use the corresponding alternative version of the product data sheet instead.

Reference information

• Guide | NOVAGUARD 4701 & 4801 | Application manual
• Information sheet | Explanation of product data sheets

Quality guarantee

PPG warrants (1) that it has good title to the product, (2) that the product quality conforms to the relevant technical quality specifications in force at the date of manufacture of the product, and (3) that the supplied product is free of lawful claims by third parties for infringement of US patent rights. The above warranties are limited to those given by PPG and other express or implied warranties required by applicable laws and regulations for transactions and commercial practice; any abuse contrary to the stated conditions, and any other warranty for special purposes or uses, are excluded, and PPG shall be free from liability. To claim under this warranty, the buyer must notify PPG in writing within five (5) days of discovering the quality defect, and the date must be within the product's valid storage period or within one (1) year from delivery of the product to the buyer. If the buyer fails to notify PPG of the defect as required above, this will prejudice the buyer's right to obtain compensation under this warranty from PPG!

Limitation of liability

In all cases, PPG shall not be liable for any indirect, special, incidental or consequential loss of any kind arising from or in connection with the use of this product (whether based on negligence, strict liability or tort). The information in this product data sheet is based on laboratory tests we believe to be reliable, and is provided for guidance only. PPG may revise this information at any time as experience accumulates and product development progresses. All recommendations and advice concerning the use of this product, whether in technical documents, in response to an enquiry or otherwise, are given to the best of our knowledge and are believed to be reliable. Our products and related information are provided for industrial users possessing the necessary knowledge and practical skills, and it is the end user's responsibility to determine whether the product is suitable for the specific use. The buyer, having performed such evaluation, proceeds entirely at its own risk. The quality and condition of the substrate on site, and the many other factors affecting product use and application, are beyond PPG's control. Therefore, PPG accepts no liability for any loss, injury or damage arising from the use of the information in this product data sheet (unless otherwise provided in a written agreement). Different application environments, changes to the application process or extrapolation of the reference data may result in failure to achieve the expected coating quality. This product data sheet supersedes all previous versions. The buyer is responsible for confirming that the data sheet in hand is the latest version before using the product. The latest version is published on the official website of PPG Protective & Marine Coatings: www.ppgpmc.com. In case of discrepancy between the Chinese version and the original English version of the product data sheet, the English original shall prevail.

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