Where to Buy High-Purity Phosphate Esters for Coatings?

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In the coatings industry, performance and purity go hand in hand — and phosphate esters are the unsung heroes that make paints smoother, more stable, and longer-lasting.

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You can buy high-purity phosphate esters for coatings directly from professional chemical manufacturers like Donghong Chemical, a trusted supplier specializing in AEO-3, NP-10, and TEP phosphate esters with ≥99% purity and low color for advanced coating formulations.

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Phosphate esters are multifunctional additives used as wetting agents, dispersants, and anti-corrosion agents in architectural, automotive, and industrial coatings. Choosing a high-purity supplier ensures not only consistent film performance but also regulatory compliance and long-term cost savings. Let’s explore where and how to source them safely.

Why High-Purity Phosphate Esters Matter in Coatings

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In every paint system, from waterborne emulsions to epoxy primers, purity determines chemical performance.

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Impurities and residual acids in phosphate esters can cause color instability, foaming, and metal corrosion. High-purity grades (≥99%) guarantee stable emulsification, film smoothness, and extended product shelf life.

Core Functions in Coatings:

Wetting Agent: Improves pigment dispersion and substrate adhesion.
Dispersant: Keeps pigments uniformly suspended.
Anti-Corrosion Additive: Forms a protective phosphate film on metal surfaces.
Leveling Agent: Enhances flow and gloss.
Plasticizer: Provides flexibility and durability to coating films.

Key Quality Indicators:

Parameter	Ideal Specification
Purity (%)	≥99
Acid Value (mgKOH/g)	≤0.3 (neutral), ≤150 (acidic)
Color (APHA)	≤30
Moisture (%)	≤0.1
pH (5% sol.)	6.0–7.0
Thermal Stability (°C)	≥120

When these parameters are met, phosphate esters deliver consistent, defect-free performance across coating applications.

Where to Buy High-Purity Phosphate Esters for Coatings

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Choosing the right supplier means ensuring both chemical precision and technical reliability.

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Here are the top sources and manufacturers specializing in high-purity phosphate esters suitable for industrial coating formulations.

1. Donghong Chemical (Guangdong, China)

Donghong Chemical is one of China’s leading producers of phosphate esters and surfactant additives for coatings, textiles, and lubricants.

Flagship Products for Coatings:

AEO-3 Phosphate Ester: Wetting and emulsification additive
NP-10 Phosphate Ester: Pigment dispersant and flow improver
TEP (Triethyl Phosphate): Flame retardant and plasticizer
P204 (2-Ethylhexyl Phosphate): Adhesion and corrosion control agent

Product Highlights:

Purity ≥99%, Acid Value ≤0.3 mgKOH/g
APHA Color ≤30 (water-clear appearance)
Strong acid/alkali resistance
Excellent thermal and oxidative stability
Fully REACH & ISO9001 certified

Application Fields:

Waterborne acrylic and epoxy coatings
Automotive and marine paints
Industrial metal primers and anti-corrosive systems
High-gloss decorative paints

Why Choose Donghong Chemical:
They provide custom formulations, sample support, and global export logistics. Each batch undergoes GC and IR verification for purity and performance consistency.

2. Wynca Chemical Group (Zhejiang, China)

Wynca Chemical produces organophosphorus compounds and silicone-modified phosphate esters used in high-performance coatings and adhesives.

Key Products:

Silicone phosphate esters for hybrid coating systems
Organosilane and silicone-based surfactants
Flame-retardant coating additives

Strengths:
Global export network, high R&D capacity, and sustainable production technologies for large-volume buyers.

3. Jiangsu Kolod Chemical Co., Ltd.

Known for its green and biodegradable phosphate esters, Kolod Chemical supplies surfactants and dispersants designed for environmentally friendly coatings.

Highlights:

Low-toxicity and APEO-free formulations
Excellent pH and UV stability
Certified under OEKO-TEX and ZDHC standards

Ideal for eco-label paints and low-VOC coating systems.

4. Guangzhou Lianxin Chemical Co., Ltd.

Lianxin Chemical focuses on nonylphenol-free phosphate esters and emulsion stabilizers for waterborne coatings.

Key Advantages:

NP-free, biodegradable products
Excellent pigment dispersion performance
Technical customization for coating manufacturers

They supply to textile, coating, and adhesive plants across Asia and South America.

5. Local Chemical Distributors and Authorized Resellers

If you prefer regional suppliers, look for authorized distributors representing certified manufacturers.
Before purchase:

Request a Certificate of Analysis (COA) and Technical Data Sheet (TDS).
Check the acid value, purity, and color index for every batch.
Confirm REACH and RoHS compliance for export-oriented coatings.

Dive Deeper: Recommended Phosphate Esters for Coatings

Product Name	Type	Function	Recommended Dosage (%)	Ideal Application
AEO-3 Phosphate Ester	Anionic surfactant	Wetting, emulsifying	0.5–1.0	Waterborne coatings
NP-10 Phosphate Ester	Amphiphilic surfactant	Pigment dispersion	0.3–0.8	Pigment pastes, epoxy paints
P204 (2-Ethylhexyl Phosphate)	Acidic monoester	Anti-corrosion, adhesion	0.5–1.0	Metal primers, marine coatings
TEP (Triethyl Phosphate)	Neutral triester	Flame retardant, plasticizer	0.5–1.5	PU coatings, high-temp paints
TBP (Tributyl Phosphate)	Neutral triester	Solvent, defoamer	0.3–0.8	Solvent-based coatings

All these products are tested for purity ≥99%, color ≤30 APHA, and acid value control to guarantee formulation consistency and storage stability.

How to Evaluate a Phosphate Ester Supplier

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Not all phosphate esters are produced to the same quality — supplier evaluation ensures long-term reliability.

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When choosing where to buy, check the following criteria:

Evaluation Aspect	What to Check	Why It Matters
Purity and Color	Verify APHA ≤30 and Purity ≥99%	Ensures clear coatings and low yellowing
Quality Certifications	ISO9001, ISO14001, REACH	Confirms international compliance
R&D and Customization	Capability for blending or pH adjustment	Allows formulation flexibility
Export Documentation	COA, MSDS, TDS provided	Ensures safety and traceability
Batch Consistency	GC, IR testing reports	Prevents performance variation

Donghong Chemical’s strict quality management system covers every stage — from esterification to packing — ensuring batch-to-batch uniformity and zero contamination.

Dive Deeper: Why Phosphate Esters Are Indispensable in Coating Formulations

1. Wetting and Leveling:
Reduce surface tension, allowing even coating film and improved adhesion.

2. Dispersing Power:
Stabilize pigments and fillers, preventing flocculation.

3. Corrosion Resistance:
Phosphate groups form a chemical bond with metal substrates, enhancing durability.

4. Compatibility:
Blend seamlessly with acrylics, alkyds, and polyurethane systems.

5. Eco-Performance:
Low VOC, APEO-free, and biodegradable — ideal for green coating formulations.

These properties make phosphate esters a vital ingredient in next-generation waterborne and solventborne coatings used in automotive, construction, and marine industries.

Why Choose Donghong Chemical as Your Supplier

Donghong Chemical provides:

High-purity phosphate esters (≥99%)
Custom surfactant blends for specialized coating needs
Global shipping and export documentation support
Technical consultation for formulation optimization

Core Strengths:

20,000-ton annual capacity
Fully automated esterification process
Closed-loop solvent recovery (>95% efficiency)
Compliance with REACH, RoHS, and OEKO-TEX standards

Conclusion: Buy From Certified Experts, Not Just Sellers

When purchasing high-purity phosphate esters for coatings, source from certified manufacturers with proven expertise in reaction control, purification, and global compliance.
Among all options, Donghong Chemical stands out for its precision production, consistent purity, and dedicated technical support.

Their AEO-3, NP-10, and TEP phosphate esters deliver exceptional wetting, dispersion, and anti-corrosion performance — helping coating manufacturers produce durable, eco-friendly finishes worldwide.

For bulk orders, technical data, or sample requests:

📧 Email: dohollchemical@gmail.com
📱 WhatsApp: +86 139 0301 4781

Donghong Chemical — Your trusted supplier of high-purity phosphate esters and coating additives for industrial, marine, and architectural applications worldwide.