Tayca MT-500HD Tio2 supplier

High performance transparent blue tone White pigment paste is hard to grind for special particle structure. Today we would like to share a standard preparation method to produce transparent blue tone White pigment paste with Kmeris micro nano titanium dioxide micro Titanium Dioxide RM-530L, which Is alternative to UV-TITAN L 530. Based on the key principle that nano-materials require thorough wetting and grinding to break down agglomerates and achieve optimal dispersion. The below formulation and process outlined below are suitable for most automotive refinish coatings and general industrial solvent-borne applications. The following formulation is recommended for general solvent-borne systems, particularly suitable for automotive refinish paints:     Component Function Weight Percentage Solvent (Butyl Acetate) Solvent / Diluent 13.5% Kmeris Nano-Titanium Dioxide Pigment 30.0% Dispersant KBS-F500/50 Wetting & Dispersing Agent 5.0% Acrylic Resin Binder / Film-Former 51.5% Total   100.0%   Remark:   BYK-180 can be used as a substitute for KBS-F500/50. When substituting, the dosage of BYK-180 should be adjusted based on its performance characteristics. Corresponding adjustments should be made to the solvent content to maintain the total formulation balance. Below are the Equipment and Materials for your reference.       Item Specification / Requirement Bead mill / Sand mill Horizontal or vertical sand mill Grinding media Zirconia beads, diameter 1.0 – 1.5 mm Bead filling ratio 70% – 80% of mill chamber volume Mixing vessel Suitable container for pre-mixing High-speed disperser For pre-dispersion prior to milling After preparing the raw material and equipment, next is the Preparation Procedure. Step 1: Pre-Mixing Weigh all formulation components according to the percentages listed above. Charge the solvent (butyl acetate) into a clean mixing vessel. Add the dispersant (KBS-F500/50 or BYK-180) and acrylic resin to the solvent, and mix thoroughly until homogeneous. Gradually add the Kmeris nano-titanium dioxide powder to the liquid mixture while stirring continuously. Continue stirring at moderate speed until all pigment particles are wetted and a uniform paste is formed. If available, use a high-speed disperser at 1,500–2,500 rpm for 10–15 minutes to achieve initial dispersion and break down large agglomerates. Step 2: Bead Milling (Grinding) Transfer the pre-mixed paste into the sand mill hopper or feed tank. Ensure the mill chamber is filled with zirconia beads (1.0–1.5 mm diameter) at a 70%–80% filling ratio. Start the mill and circulate the paste through the grinding chamber. Operate the mill in recirculation mode — continuously circulating the paste until the required fineness is achieved. Step 3: Fineness Inspection Periodically take samples from the circulating paste. Measure the particle fineness using a Heitman gauge / grindometer (fineness of grind gauge). Continue milling until the desired fineness specification is reached (typically ≤ 5–10 μm for nano-TiO₂ pigment pastes, or as per the specific end-use requirement). Step 4: Discharge and Filtration Once the target fineness is achieved, discharge the finished pigment paste from the mill. If necessary, filter the paste through a screen or filter bag to remove any oversize particles or worn beads. Process Parameters Summary     Parameter Recommended Value Pre-mixing speed 1,500 – 2,500 rpm Pre-mixing time 10 – 15 minutes Bead size 1.0 – 1.5 mm (zirconia) Bead fill ratio 70% – 80% Milling mode Recirculation (loop milling) Milling temperature Monitor and control below 45–50°C to avoid resin degradation Target fineness As specified (typically ≤ 5–10 μm) Quality Control Checks After preparation, the following quality parameters should be verified:     Parameter Test Method Acceptance Criteria Fineness of grind Grindometer (Heitman gauge) As per specification Viscosity Ford cup or rotational viscometer Within target range Solid content Oven drying method Matches formulation Color strength Spectrophotometer vs. standard Acceptable tolerance Storage stability 7-day / 30-day aging test No settling or viscosity drift Notes and Recommendations Wetting is critical: Nano-titanium dioxide has a high surface area and strong tendency to agglomerate. Ensure the dispersant is fully dissolved in the solvent system before adding the pigment. Temperature control: During milling, friction may cause temperature rise. Excessive heat can degrade the resin or alter the dispersion quality. Use a cooling water jacket if available and keep the mill temperature below 45–50°C. Bead filling ratio: Maintaining 70%–80% bead fill is essential for efficient grinding. Lower fill ratios reduce grinding efficiency, while higher ratios may cause excessive heat generation or mill blockage. Dispersant adjustment: When using BYK-180 as a replacement for KBS-F500/50, the optimal dosage may vary. It is recommended to conduct a small-scale trial to determine the optimum dispersant level before full-scale production. Solvent adjustment: Any change in dispersant type or dosage should be compensated by adjusting the solvent content to maintain the total formulation at 100%. Storage: Store the finished pigment paste in sealed containers, away from direct sunlight and heat sources, to prevent solvent evaporation and skin formation.