BYK-161

Product Details

CasNo： 64742-46-7

Appearance： liquid

Delivery Time： 15 days

Packing： 25kg/drum

Purity： 99%

Basic Information

• Brand and Model: BYK, BYK-161
• Packaging Specifications: 25 kg/blue iron drum (suitable for laboratory research, small-batch trials, and procurement needs of small and medium-sized enterprises), 200 kg/blue iron drum (meets large-scale production requirements of factories, reducing unit packaging costs)
• Chemical Composition: High-molecular-weight block copolymer solution containing pigment-affinic groups (the block copolymer segments in the molecular structure have strong affinity with pigment surfaces, while achieving long-term stable dispersion through steric hindrance effects)

Product Characteristics

• Appearance and Physical Properties:Typically a pale yellow to amber transparent liquid with no irritating odor. Density is approximately 1.05 - 1.15 g/cm³ at 20℃, with a flash point >60℃, ensuring high safety during storage and transportation. It exhibits excellent compatibility with solvent-based coating systems (such as polyurethane, acrylic, and alkyd resins) and pigment concentrates, enabling rapid and uniform dispersion without stratification or flocculation.

• Core Functions

  1. Efficient Stabilization of Fine Pigments: It has strong affinity for ultra-fine carbon black (e.g., pigment carbon black) and organic pigments (e.g., phthalocyanine series, azo types). It can penetrate into pigment agglomerates, forming stable dispersion structures through anchoring effects and steric hindrance of block copolymers, preventing pigment re-aggregation during storage.
  2. Significant Viscosity Reduction: It can drastically reduce the viscosity of grinding pastes (by 30% - 50% compared to non-added systems), improving grinding efficiency and achieving finer pigment particle sizes (up to nano-scale dispersion). It also allows the system to accommodate higher pigment ratios, increasing color concentration without compromising fluidity.
  3. Compatibility with Special Systems: Particularly suitable for two-component polyurethane coatings (e.g., automotive refinish paints, high-end industrial paints) and baking systems (e.g., high-temperature curing coil coatings, original automotive paints). It does not react with resins during cross-linking curing or high-temperature baking, and does not affect coating performance (e.g., hardness, weather resistance, chemical resistance).
  4. Enhanced Coating Performance: Uniform and fine pigment particles after dispersion can improve coating gloss, color saturation, and weather resistance, reducing coating defects (e.g., pinholes, craters) caused by uneven pigment dispersion.

Application Fields

• Main Application Scenarios

  1. Solvent-Based Automotive Coatings: Including mid-coats and color coats of original equipment manufacturer (OEM) automotive paints, as well as automotive refinish paints. It disperses ultra-fine carbon black and organic pigments to ensure uniform body color and high gloss, meeting strict appearance requirements of high-end automobiles.
  2. Industrial Coatings: Suitable for high-end industrial protective paints (e.g., engineering machinery paints, precision instrument paints) and baking coatings (e.g., home appliance shell paints, metal coil paints). It solves dispersion challenges of fine-particle pigments and enhances coating decorativeness and protective performance.
  3. Pigment Concentrates: Used in preparing high-concentration organic pigment pastes and carbon black pastes, ensuring storage stability of pastes, simplifying downstream color-mixing processes, and reducing floating and blooming issues during color adjustment.

• Applicable Systems: Two-component polyurethane systems, baking-type solvent coatings (acrylic, polyester, amino resin systems), solvent-based pigment concentrates (with aromatic hydrocarbons or esters as solvent carriers).

Recommended Dosage and Usage Methods

• Recommended Dosage:Calculated based on the "total amount of organic pigments/carbon black" in the formula, the conventional addition level is 2% - 5% (added directly as purchased). For high-pigment carbon black or ultra-fine organic pigments, dosage can be increased to 5% - 8% to ensure sufficient dispersion stability.

• Usage Methods:

  1. Priority Addition During Grinding: Add BYK-161 with pigments, resins, and solvents into sand mills or high-speed dispersers. During grinding, the dispersant fully adsorbs onto pigment surfaces to form a stable dispersion layer, maximizing viscosity reduction and dispersion effects at this stage.
  2. Supplementary Addition During Paint Mixing: If system viscosity is too high or dispersion is insufficient after grinding, supplementary addition (not exceeding 20% of total dosage) can be made during paint mixing. After addition, stir at 1000 - 1500 r/min for 15 - 20 minutes to ensure complete integration with the system.

Storage and Transportation

• Storage Conditions: Store in a cool, dry, well-ventilated area at 5 - 35℃, avoiding direct sunlight (high temperatures may cause degradation of copolymer segments, affecting dispersion performance) and freezing (temperatures below 0℃ may cause stratification, which can be restored to uniformity after thawing and thorough stirring without affecting usability). Keep barrels tightly sealed to prevent solvent evaporation or impurity contamination.
• 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). Provide shade during summer transportation; no additional insulation is needed in winter (short-term low temperatures do not affect product performance).

Competitive Advantages

1. Specialized for Fine Pigments: Optimized for dispersing ultra-fine carbon black and organic pigments, with dispersion efficiency and stability far exceeding general-purpose dispersants, solving the industry pain point of "difficult dispersion and easy flocculation of fine pigments."
2. Compatibility with Special Systems: Excellent performance in two-component polyurethane and high-temperature baking systems, without interfering with curing reactions or compromising coating performance, filling the application gap of ordinary dispersants in such systems.
3. Balanced Viscosity Reduction and High Loading: While significantly reducing viscosity, it enables higher pigment loading, helping customers reduce raw material costs while ensuring performance, and enhancing product competitiveness.
4. Technical Support: BYK provides a professional technical team that can customize dispersion solutions based on customers' specific pigment types and system formulations, assisting in solving issues like uneven dispersion and abnormal viscosity, accelerating product development and mass production.