PPG SigmaPrime 700, a universal epoxy anticorrosive primer, based upon pure epoxy technology. The primer system is suitable for Ballast Tanks, Decks, Topside, Superstructure and Hulls, with good adhesion to steel, galvanized steel and non-ferrous metals, curing at temperatures down to 5°C (41°F).

Features & Benefits

• Universal pure epoxy primer system suitable for Ballast Tanks, Decks, Topside, Superstructure and Hulls
• Good abrasion resistance for dedicated areas of application
• Good adhesion to steel, galvanized steel, non-ferrous metals
• Good flow and wetting properties
• Good water and corrosion resistance
• Cures at temperatures down to 5°C (41°F)
• Suitable for touching up of weld seams and damages of epoxy coatings during construction
• Excellent recoatability
• Can be overcoated with most alkyd-, chlorinated rubber-, vinyl-, epoxy- and two-component polyurethane coatings
• Compatible with well-designed cathodic protection systems
• Suitable on wet blast cleaned substrates (damp or dry)
• Used at Chandris Hellas, a ship management company based in Piraeus, Greece and specializes in the management and operation of oil tankers and bulk carriers, with a fleet deadweight capacity close to 4 million DWT tonnes.

Product Data

Universal epoxy anticorrosive primer, based upon pure epoxy technology

Notes:

• Mass Density (kg/l); Base 1,46 - 1,56 Hardener 0,96 - 0,99 Set 1,35 - 1,45
• Refer below for more details on spreading rate and film thickness, overcoating intervals and curing times

Surface Preparation

Recommended Substrate Conditions and Temperatures

Immersion exposure

• Steel or steel with not approved zinc silicate shop primer; blast cleaned (dry or wet) to ISO-Sa2½, blasting profile 30 - 75 µm (1.2 – 3.0 mils)
• Steel with approved zinc silicate shop primer; weld seams and areas of damaged shop primer or breakdown should be blast cleaned to ISO-Sa2½, blasting profile 30 - 75 µm (1.2 – 3.0 mils) or power tool cleaned to SPSS-Pt3
• Coated steel; hydrojetted to VIS WJ2L (blasting profile 30 – 75 µm (1.2 – 3.0 mils))
• Previous coat must be dry and free from any contamination

IMO-MSC.215(82) Requirements for Water Ballast Tanks and IMO-MSC.288(87) for Cargo tanks of Crude Oil Tankers (specified areas only)

• Steel; ISO 8501-3:2006 grade P2, with all edges treated to a rounded radius of minimum 2 mm (0.079 in) or subject to three pass grinding or at least equivalent process before painting
• Steel or steel with not approved zinc silicate shop primer; blast cleaned to ISO-Sa2½, blasting profile 30 - 75 µm (1.2 – 3.0 mils)
• Steel with approved zinc silicate shop primer; weld seams and areas of shop primer damage or break down should be blast cleaned to Iso-Sa 2½ blasting profile 30 – 75 µm (1.2 – 3.0 mils): [1] For shop primer with IMO type approval; no additional requirements; [2] For shop primer without IMO type approval; blast cleaned to ISO-Sa2 removing at least 70% of intact shop primer, blasting profile 30 – 75 µm (1.2 – 3.0 mils)
• Dust quantity on the surface to be coated must not exceed rating "1" for dust size class "3", "4" or "5" (ISO 8502-3-2017). Lower dust size classes (“1” and/or “2”) to be removed if visible without magnification.
• Previous coat must be dry and free from any contamination

Atmospheric exposure conditions

• Steel; blast cleaned to ISO-Sa2½, blasting profile 30 - 75 µm (1.2 – 3.0 mils) or according to ISO-St3
• Shop primed steel; pretreated to SPSS-Pt3
• Existing pipelines may have to be cleaned first by scraper pigs and solvents
• Galvanized steel must be sweep blasted or otherwise roughened
• Galvanized steel must be free from grease, salts and any contamination
• Previous coat must be dry and free from any contamination

Substrate Temperature & Application Conditions

• Substrate temperature during application and curing should be above 5°C (41°F)
• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point
• Relative humidity during application and curing should not exceed 85%

Application

Instructions for Use

Mixing ratio by volume: base to hardener 80:20 (4:1)

• The temperature of the mixed base and hardener should preferably be above 15°C (59°F), otherwise extra thinner may be required to obtain application viscosity
• Adding too much thinner results in reduced sag resistance and slower cure
• Thinner should be added after mixing the components

Induction Time

• None.

Air spray

Recommended thinner

• THINNER 91-92

Volume of thinner

• 0 - 10%, depending on required thickness and application conditions

Nozzle orifice

• 1.5 – 2.0 mm (approx. 0.060 – 0.079 in)

Nozzle pressure

• 0.3 - 0.4 MPa (approx. 3 - 4 bar; 44 - 58 p.s.i.)

Airless spray

Recommended thinner

• THINNER 91-92

Volume of thinner

• 0 - 15%, depending on required thickness and application conditions

Nozzle orifice

• Approx. 0.53 – 0.74 mm (0.021 – 0.029 in)

Nozzle pressure

• 15.0 MPa (approx. 150 bar; 2176 p.s.i.)

Brush/roller

Recommended thinner

• No extra thinner is necessary

Volume of thinner

• Up to 5% THINNER 91-92 can be added if desired

Cleaning Solvent

• 90-53.

Spreading Rate and Film Thickness

Note:

• Note: Max. dft: Dry Film Thickness of 2000 µm (80.0 mils) may occur occasionally (minor areas) where multiple overlapping is unavoidable (i.e. around scallops, corners, erection joint lines etc.). PPG/Rawlins Paints must be consulted (0113 2455450 / [email protected]) in case of DFT readings fall outside this recommendation.

Overcoating interval for DFT up to 160 µm (6.3 mils)

Notes:

• Surface should be dry and free from any contamination

Curing time for DFT up to 160 µm (6.3 mils)

Notes:

• Adequate ventilation must be maintained during application and curing (please refer to information sheets information sheet 1433 and Directives for Ventilation Practice (information sheet 1434)

Pot Life (at application viscosity)

Safety Precautions

• For paint and recommended thinners, see information sheets information sheet 1430, information sheet 1431 and the relevant Material Safety Data Sheets in the attachments section above
• This is a solvent-borne paint and care should be taken to avoid inhalation of spray mist or vapor, as well as contact between the wet paint and exposed skin or eyes

References

• Conversion Tables (information sheet 1410)
• Explanation to product data sheets (information sheet 1411)
• Safety Indicators (information sheet 1430)
• Safety in Confined Space and Health Safety, Explosion Hazard - Toxic Hazard (information sheet 1431)
• Safe Working in Confined Spaces (information sheet 1433)
• Directives for Ventilation Practice (information sheet 1434)
• Cleaning of Steel and Removal of Rust (information sheet 1490)
• Specification for Mineral Abrasives (information sheet 1491)
• Relative humidity - Substrate Temperature - Air Temperature (information sheet 1650)