AMERCOAT 450S aliphatic polyurethane topcoat 450 S

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Introduction

A two-component aliphatic polyurethane topcoat.

Key properties

• High weathering performance, with particularly good colour and gloss retention.
• In marine atmospheres and various other atmospheric environments, the coating provides good protection.
• Surface does not readily accumulate dust - easy to clean.
• Hard, tough, flexible and abrasion-resistant.
• Suitable for curing over a wide temperature range.

Colour and gloss

• Various colours in RAL and BS colour charts.
• High gloss

Basic data at 20 °C (68 °F)

Parameters after mixing

UK PG 6/23(92) Appendix 3: maximum 386.0 g/L (approx. 3.2 lb/US gal).

Maximum time: unlimited.

Curing agent: at least 24 months; store in a dry and cool environment.

Notes

• See supplementary parameters — recoat interval table.
• See supplementary parameters table — curing time table.

Recommended substrate condition and temperature

• The final performance quality of the coating depends on the quality of the preceding surface preparation, roughly proportional. Refer to the curing parameters of the compatible primer and intermediate coat

and other technical application requirements. For certain epoxy coatings, before overcoating with this product, verify the surface has no amine bloom and other defects, is clean and dry with all contaminants removed. In addition, both primer and intermediate coat must comply with the minimum and maximum overcoating interval requirements of each product. For aged epoxy coatings, surface abrading/roughening is required. For unknown old coatings of uncertain nature, it is recommended to test-apply a small patch area before full overcoating.

Substrate temperature and application conditions

• During application, ensure the surface temperature is between Celsius 0 °F (Fahrenheit 32 °C) and Celsius 50 °F (Fahrenheit 122 °C).
• During application, the substrate surface temperature must be maintained at least 3 °C (5 °F) above the dew point.
• During application and curing, the ambient temperature shall be controlled between 0 °C (32 °F) and 50 °C (122 °F).
• The ambient relative humidity during application shall not exceed 85%.

Instructions for use

Mixing ratio by volume: base : curing agent = 80 : 20

• Add the curing agent to the base component and stir continuously until the two components are thoroughly mixed and fully homogeneous.
• Ensure the mixed paint temperature of the base and curing agent is above 10 °C (50 °F); otherwise, additional thinner may be required to bring the paint viscosity

adjust to a state suitable for site application.

• Thinner shall be added only after the two components are mixed.
• Excessive thinning generally reduces the sag resistance of the wet film.

Induction Time

Not required.

Air spray

Airless spray (single-feed pump)

Brush/roller

Self-recoat

Curing time table for a coating at 50 µm (2.0 mils) dry film thickness

Notes

• Adequate and continuous ventilation must be maintained during application and curing of the coating.
• The coating must not be exposed to rain or surface condensation too early, otherwise its colour and gloss may change.

Pot life after mixing (at suitable application viscosity)

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.

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.

The PPG logo, and all other PPG marks are property of the PPG group of companies. All other third-party marks are property of their respective owners.