Complete Formulation Guide for Water-Based Architectural Emulsion Paint

Q: What binder is best for exterior emulsion paint in the GCC climate?

Pure Acrylic Emulsion offers the best UV resistance and durability for exterior applications in the GCC, where UV intensity and temperatures are extreme. Styrene Acrylic Emulsion is a cost-effective alternative for most standard applications. For premium facade paints in coastal UAE or Saudi Arabia, Pure Acrylic is recommended.

Q: What TiO2 grade should I use for architectural emulsion paint in Saudi Arabia?

Rutile grade TiO2 is recommended for exterior paints due to superior UV resistance and durability. Anatase grade is suitable for interior paints where UV is not a concern and cost optimisation is a priority. Both grades are available from Raykem in bags and supersacks.

Q: What VOC limits apply to emulsion paints sold in Saudi Arabia?

SASO regulations define VOC limits for architectural coatings. Interior flat paints typically have a 50 g/L VOC limit and interior non-flat paints 150 g/L. Always verify current SASO standards as they are periodically updated. Low-VOC formulations using water-based coalescents are increasingly specified in Saudi Arabia.

Water-based architectural emulsion paint is the dominant coating product across the GCC residential and commercial construction sector. With Saudi Arabia's Vision 2030 housing programmes driving unprecedented construction activity and the UAE's ongoing building boom, demand for quality emulsion paint raw materials has never been stronger. This guide provides a practical formulation framework for paint manufacturers and R&D chemists working in the region.

Core Raw Materials for Emulsion Paint

A standard interior or exterior emulsion paint consists of four functional components: binder (emulsion polymer), hiding/extender pigments, water, and additives. Understanding the role and dosage of each is essential to producing a stable, high-performance product.

1. Binder — Emulsion Polymer

The binder is the most critical component determining film performance. For the GCC market, the most commonly used binders are:

Styrene Acrylic Emulsion — the standard for interior and exterior paints. Offers good durability, scrub resistance, and exterior weatherability at a competitive cost. Suitable for temperatures up to 50°C+ encountered across the GCC.
Pure Acrylic Emulsion — premium exterior grade with superior UV resistance and colour retention. Preferred for facade paints on high-value projects or coastal environments (Abu Dhabi, Jeddah).
VAM Veova Emulsion — cost-effective interior paint binder with good alkali resistance on fresh plaster — ideal for the high-pH walls common in new Saudi residential construction.

View Raykem's emulsion polymer range →

2. Hiding Pigment — Titanium Dioxide (TiO2)

TiO2 is the primary source of opacity and whiteness in emulsion paint. The GCC market predominantly uses Rutile grade TiO2 (higher durability, better UV resistance) for exterior applications and Anatase grade for interior paints where UV exposure is not a concern and the lower price point matters. Typical dosage is 15–22% by weight of the total formulation.

3. Extender Pigments

Extenders reduce TiO2 loading (cost management) and contribute to specific properties:

Calcium Carbonate (ground) — primary extender, improves film build at low cost
Kaolin (China Clay) — improves washability and provides film structure
Talc — reduces gloss, improves anti-sag properties in textured products
Mica — provides flatting effect and improves scrub resistance

Typical Interior Emulsion Paint Formulation

The following is a starting point formulation for a mid-sheen interior emulsion paint suitable for the GCC market. All percentages are by weight of total batch.

Raw Material	Function	% by weight
Water (deionised)	Carrier medium	25–30%
Dispersing Agent	Pigment wetting and dispersion	0.3–0.5%
Defoamer (mineral or silicone)	Prevents foam during production and application	0.1–0.3%
TiO2 (Rutile or Anatase)	Primary hiding pigment	15–20%
Calcium Carbonate (extender)	Extender pigment, cost reduction	15–25%
Kaolin (China Clay)	Film structure, washability	5–10%
Styrene Acrylic Emulsion (50% solids)	Film-forming binder	20–28%
Acrylic Thickener (ASE/HASE)	Viscosity, sag resistance, storage stability	0.3–0.8%
In-can Biocide (BIT/MIT)	Preservative against microbial growth in can	0.05–0.15%
Film Biocide (DCOIT/OIT)	Anti-mould protection in exterior films (GCC climate)	0.1–0.2%
Coalescent / Film Forming Aid	Ensures film formation at low temperatures	0.5–1.5%

Manufacturing Process Order

The sequence of addition is critical for paint production quality. A recommended process order for the pigment grind stage is:

Add water to the dispersion vessel
Add dispersing agent under slow agitation
Add defoamer
Add TiO2 gradually under high-speed dispersion
Add extenders (calcium carbonate, kaolin) under dispersion
Disperse to target Hegman fineness (≥5 for standard, ≥6 for premium)
Let-down: reduce speed and add emulsion polymer
Add pre-diluted thickener
Add biocides (in-can and film)
Adjust pH to 8.5–9.0 with ammonia solution
Check and adjust viscosity, pH, and TiO2 spreading rate

GCC Market Considerations

Formulating emulsion paints for the GCC requires specific attention to the region's climate and application conditions. Exterior paints must resist UV degradation, chalking, and microbiological growth in the humid coastal zones of the UAE and Saudi Arabia. Interior paints must dry quickly in air-conditioned environments while remaining stable during transportation in ambient temperatures exceeding 45°C. Additionally, SASO (Saudi Standards, Metrology and Quality Organization) regulations define VOC limits for architectural coatings — formulators targeting the Saudi market should ensure compliance with current SASO standards.

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