BYK-108

Product Details

CasNo： 64742-46-7

Appearance： liquid

Delivery Time： 15 days

Packing： 25kg/drum

Purity： 99%

Basic Information

• Brand and Model: BYK, BYK-108
• Packaging Specifications: 25 kg/blue iron drum (suitable for small-batch trials, laboratory research, or medium-small enterprise needs), 190 kg/blue iron drum (meets large-scale production requirements of factories, reducing unit packaging costs)
• Chemical Composition: Hydroxyl-functional carboxylic acid ester containing pigment-affinic groups (molecular structure features both polar adsorption sites of hydroxyl groups and solvent compatibility of carboxylic acid esters, balancing pigment wetting and system stability)

Product Characteristics

• Appearance and Physical Properties:Typically a colorless to pale yellow transparent liquid with no irritating odor. Density is approximately 0.95 - 1.05 g/cm³ at 20℃, with a flash point higher than conventional solvent-based additives (>60℃), minimizing fire risks during storage and transportation. As a solvent-free additive, it contains no volatile organic compounds (VOCs), complying with environmental regulations. It exhibits excellent solubility in esters, alcohol ethers, aliphatic hydrocarbons, and other solvents, enabling rapid and uniform mixing with solvent-based coating and ink systems without stratification, precipitation, or turbidity.

• Core Functions

  1. Efficient Wetting and Dispersion: Pigment-affinic groups (hydroxyl and carboxylic ester groups) in the molecule form strong adsorption with pigment surfaces (e.g., hydroxyl groups of inorganic pigments, polar groups of organic pigments), quickly breaking down pigment agglomerates into fine, stable particles. This enhances pigment tinting strength and hiding power while reducing pigment consumption.
  2. Anti-floating and Blooming: Specifically for high-solids coatings (solids content >60%) or aromatic-free eco-friendly architectural coatings, it balances migration rates of different pigments (e.g., titanium dioxide, calcium carbonate, organic colorants). This prevents "color stratification" and "blooming" after application, ensuring uniform coating color—especially suitable for colorless transparent or light-colored coatings with high appearance requirements.
  3. Solvent-free Environmental Compatibility: Its solvent-free nature allows direct use in eco-friendly systems like high-solids coatings and aromatic-free coatings, eliminating the need for additional solvent ratio adjustments. This avoids coating shrinkage and pinholes caused by solvent evaporation while meeting EU REACH, China GB 18581, and other environmental standards.
  4. Enhanced System Stability: Hydroxyl functional groups interact weakly with coating resins (e.g., alkyd, acrylic, polyurethane resins), improving compatibility between dispersions and resins. This extends the storage shelf life of coatings, inks, and pigment concentrates (reducing pigment sedimentation risks within 3-6 months).

Application Fields

• Main Application Scenarios

  1. Architectural Coatings: Primarily used in high-solids architectural coatings (e.g., high-solids acrylic exterior wall paints) and aromatic-free eco-friendly interior wall paints. It solves blooming issues in light-colored coatings and is compatible with colorless transparent topcoats, ensuring coating transparency and gloss.
  2. Industrial Coatings: Suitable for metal industrial paints (e.g., anti-rust paints for construction machinery) and leather coatings (e.g., solvent-based leather finishes for sofas and luggage). It enhances coating weather resistance and adhesion while preventing uneven coating performance caused by pigment sedimentation.
  3. Printing Inks: Covers gravure printing (e.g., plastic film packaging), flexographic printing (e.g., paper packaging, label printing), and screen printing (e.g., metal nameplates, glass printing). It ensures uniform color on various substrates, reducing printing defects like blockages and color differences.
  4. Pigment Concentrates: Used in preparing high-concentration pigment pastes (e.g., color masterbatches, coating pastes) to improve paste stability. This ensures easy dispersion and no floating when pastes are mixed with base coatings, simplifying downstream color-mixing processes.

• Applicable Systems: Solvent-based coatings (alkyd, acrylic, polyurethane resin systems), solvent-based printing inks (polyamide, nitrocellulose resin systems), and pigment concentrates (solvent-based carriers).

Recommended Dosage and Usage Methods

• Recommended Dosage:Calculated based on the "total pigment amount" in the formula, the conventional addition level is 0.5% - 3% (added directly as purchased). For high-solids coatings or difficult-to-disperse pigments (e.g., nano-pigments, carbon black), dosage can be increased to 3% - 5%. For pigment concentrates, dosage may be adjusted to 5% - 8% of pigment weight to ensure paste stability.

• Usage Methods:

  1. Priority Addition During Grinding: Add BYK-108 with pigments, solvents, and part of the resin into grinding equipment (e.g., sand mills, high-speed dispersers). During grinding, it fully adsorbs onto pigment surfaces to form a stable dispersion layer, maximizing wetting and dispersion efficiency.
  2. Supplementary Addition During Paint/Ink Mixing: If slight pigment agglomeration or floating occurs after grinding, a small supplementary amount (not exceeding 20% of total dosage) can be added during mixing. After addition, stir at 800 - 1200 r/min for 10 - 15 minutes to ensure full integration with the system.

Storage and Transportation

• Storage Conditions: Store in a cool, dry, well-ventilated area at 5 - 40℃, avoiding direct sunlight (high temperatures may cause slight molecular chain degradation, affecting dispersion performance) and freezing (temperatures below 0℃ may cause mild turbidity, which clears after thawing and thorough stirring without affecting usability). Keep barrels tightly sealed to prevent dust or moisture intrusion.
• Shelf Life: 60 months under the above storage conditions (counted from the production batch date).
• Transportation Requirements: Transport as a "non-hazardous chemical." Avoid severe collisions and inversion during transportation (to prevent leakage from damaged blue iron drums). Protect from prolonged sunlight in summer; no additional insulation is needed in winter (short-term low temperatures do not affect product performance).

Competitive Advantages

1. Balanced Environmental Performance and Efficacy: As a solvent-free dispersant, it meets VOC restrictions in environmental regulations without sacrificing dispersion performance. It is especially suitable for eco-friendly coating/ink systems like high-solids and aromatic-free formulations, solving the industry challenge of "balancing environmental compliance and performance."
2. Broad Application Range: Covers architecture, industry, leather, printing, and other fields, compatible with gravure, flexographic, and screen printing processes. This eliminates the need for changing dispersants across different scenarios, reducing customer procurement and formula adjustment costs.
3. Strong Compatibility with High-Solids Systems: Designed for high-solids coatings (high solids content, low solvent levels, and high dispersion difficulty), it efficiently wets and disperses pigments, avoiding dispersion failure due to insufficient solvents and ensuring application and appearance performance of high-solids coatings.
4. Technical Support: BYK provides dedicated technical team support, offering customized dosage plans based on customers' specific formulations (e.g., pigment types, resin systems) and assisting with on-site issues like uneven dispersion or floating/blooming, shortening customers' product development cycles.