ADDITOL® XW 6591

Water-dilutable, modified polyester-acrylate polymer primarily used as a grinding medium for color- and shading pigment pastes. Here are the key details from its technical datasheet:

Type:

• Water-dilutable, modified polyester-acrylate polymer.

Form of Delivery (f.o.d.):

• 34% in water (34WA), containing 6.5% butyl glycol.

Neutralization Agent:

• 2.5% dimethyl ethanolamine, as salt.

Tentative Product Data:

• Dynamic Viscosity: 100 - 3000 mPa.s (25 1/s; 23 °C)
• Non-Volatile Matter: 33 - 35%
• Acid Value: 15 - 30 mg KOH/g (form of delivery)
• pH-Value: 8.0 - 9.0 (10%)
• Colour/Appearance: Yellowish, clear to opaque

Special Properties and Use:

• Used for color- and shading pigment pastes.
• Compatible with various waterborne systems including air-drying and stoving alkyds, acrylic resins, UV-curing systems, PU dispersions, and plastic dispersions.
• Co-crosslinking in melamine and isocyanate curing systems.
• Offers excellent wetting power for both inorganic and organic pigments.
• Provides low thermo discoloration at high-temperature baking conditions.
• Compatible with a wide variety of water-dilutable binder systems without altering special characteristics.
• Improves leveling and gloss of coatings.

Processing:

• Can be used in pigment paste formulations in combination with other additives and pigments.

Storage:

• Storage stability in original containers at temperatures up to 25°C is at least 180 days.
• Water-containing products may freeze below 0°C but can be regenerated through warmth treatment at 40 - 50°C while stirring.

Distinguishing Features:

• Offers better chemical resistance and salt spray test results in final coatings compared to other waterborne grinding resins due to its co-crosslinking capability in melamine and isocyanate systems.

This information is subject to change based on further developments, and users are advised to conduct their own tests to ensure suitability for specific applications.