EZHOU ANJEKA TECHNOLOGY CO.,Ltd

Anjeka Experimental Report (No.: 20260323) Anjeka Experiment Item: Dispersant Testing Experiment Category: Testing of Dispersant Performance in Acrylic Water-Based Flexographic Ink and Paint Coating Carbon Black – Dispersibility and Stability Evaluation Experimenter: Technical Department Date of Submission: March 2026 1. Experimental Objective The customer's sample slurry is an acrylic-based system using Cabot 300 carbon black with a carbon black content of 50%. The target carbon black content is 35%. Before sample preparation, the slurry must be thoroughly homogenized. 2. Experimental Protocol After sample preparation, the following requirements must be met: Zahn cup viscosity: 12–18 s (corresponding to rotational viscometer reading of 200–300 mPa·s) No wetting agent required Fineness:

Technical Background: Challenges for PU Flooring in Tropical Climates   In tropical regions like Southeast Asia, high humidity and temperature pose severe technical challenges for Polyurethane (PU) flooring applications. The reaction between moisture and isocyanate components easily generates $CO_{2}$ bubbles, which, combined with the high viscosity of solvent-free systems, makes micro-bubbles difficult to escape naturally. If not effectively managed, the cured coating will exhibit defects such as pinholes, craters, or even delamination, severely impacting project acceptance.   Silicone-Free Defoamers: The Key to Inter-coat Adhesion For self-leveling floors and anticorrosive coatings, the choice of defoamer is critical. While silicone-based defoamers are efficient, they often cause fisheyes or reduce recoat adhesion in multi-layer applications. ANJEKA-5520, a 100% active content silicone-free polymer defoamer, provides a more reliable alternative.   100% Active Content: Free of diluents, ensuring effectiveness in high-viscosity resins even at minimal dosages. Silicone-free Structure: Eliminates fisheye defects associated with traditional silicone products, ensuring excellent recoatability and bonding reliability. Physical Consistency: Maintains a density of $0.80-1.10 g/cm3 at 23 ˚ C, allowing for easy and uniform dispersion in formulations.   Processing Guide: Handling High Shear and Storage Stability In industrial production, ANJEKA-5520 demonstrates excellent process adaptability. For manufacturers in Southeast Asia, long-term product stability is key to reducing after-sales complaints. Incorporation: For optimal performance, adding the defoamer prior to the grinding stage is recommended. If added later, sufficient shear force must be applied to ensure proper dispersion. Storage Stability: The product remains stable for up to 12 months, resisting separation or precipitation. Temperature Control: Despite the hot climate in SEA, if exposed to low temperatures below 5 ˚ C during transit, turbidity may occur; simply heating to 20˚ C and mixing thoroughly restores clarity without affecting active performance.   For PU flooring professionals in Southeast Asia, ANJEKA-5520 not only addresses the pain point of micro-bubbles on-site but also reduces production complexity through its stable physical parameters (recommended dosage of 0.1-1.0%). Whether in high-speed mixing, roller coating, or casting, it ensures the ultimate integrity of the coating.

Anjeka Experimental Report     Study on the storage stability of ceramic ink     Experimental project: Study on the storage stability of ceramic ink Experimental category: Dispersant, anti settling agent testing Experimenter: Product Application Engineer Xinzhong Zhai   Abstract:Ceramic inks were prepared using Anjikang dispersants 6042A and 6042B, anti-settling agents 4311, 4360, 6701, 972, and bentonite. The stability of the ceramic inks was evaluated by measuring the particle size, viscosity, centrifugal sedimentation rate, and sedimentation rate after thermal storage, as well as the hard settling rate. The experimental results indicate that the white oil-based ceramic ink prepared with Anjeka 6042B dispersant exhibits the best storage stability. Keywords: dispersant, anti settling agent, particle size, viscosity, centrifugal precipitation rate1.   1.Objective Ceramic inks were prepared using different formulations incorporating Anjeka dispersants 6042A and 6042B, anti-settling agents 4311, 4360, 6701, 972, and bentonite. The stability of the ceramic inks prepared with different formulations was investigated by evaluating particle size, viscosity, centrifugal sedimentation rate, as well as sedimentation rate and hard settling rate after thermal storage. 2. Experimental Protocol Reagents: Ceramic colorant (encapsulated red, Guose), dispersants Anjeka 6042A and Anjeka 6042B, anti-settling agents Anjeka 4311, Anjeka 4360, Anjeka 6701, 972, bentonite, white oil, cocoate, isopropyl laurate, ceramic pigment, and Mirui ceramic ink sample. Instruments: Centrifuge (Model 80-2B, Jiangsu Jinyi Instrument Technology Co., Ltd.), nanoparticle size analyzer (Model BeNano 90, Dandong Bettersize Instruments Co., Ltd.), oscillating disperser, rotational digital viscometer, ultrasonic disperser, oven. Preparation of Ceramic Ink White oil No. 10, cocoate, and dispersant were mixed in a certain proportion until homogeneous. The ceramic colorant was then added and mixed thoroughly. Zirconia beads (0.3 mm diameter) in an amount three times the mass of the slurry were added, and the mixture was placed in an oscillating disperser for dispersion. Thermal Storage The inks were stored in an oven at 50°C for 72 hours. Testing Methods Particle Size Measurement of Ceramic Colorant in Ink: The ground slurry was diluted 10,000 times with white oil. The particle size of the colorant in the diluted ink was measured using a nanoparticle size analyzer. Centrifugal Sedimentation Rate: The inks were centrifuged at 3000 rpm for either 5 minutes or 10 minutes as specified. Viscosity: The viscosity of the inks was measured at 15°C using a rotational viscometer.   3. Experimental Formulations and Methods 3.1 Effect of Different Dispersants and Dosages on Centrifugal Sedimentation Rate Table 1. Experimental Formulations for Different Dispersants and Dosages Raw Material 1# 2# 3# 4# 5# 6# Supplier White Oil 42.5 43.35 44.2 42.5 43.35 44.2 Guose Cocoate 7.5 7.65 7.8 7.5 7.65 7.8 Mirui Dispersant 6042A 5 4 3       Anjeka Dispersant 6042B       5 4 3 Anjeka Encapsulated Red 45 45 45 45 45 45 Guose   3.1.1 Experimental Results and Discussion After 8 hours of oscillating grinding, the particle size, viscosity, and centrifugal sedimentation rate were measured. The results are shown in Table 3. Table 3. Particle Size, Viscosity, and Centrifugal Sedimentation Rate   1# 2# 3# 4# 5# 6# Z-Average Particle Size（nm) 225.54 369.99 275.08 295.26 273.09 292.15 Viscosity（mpa.s) 291.9 551. 1 4340 52.64 421. 1 6076 Centrifugal Sedimentation Rate%（5min) 13. 12 13.48 21.30 5.36 12.39 21.36 Centrifugal Sedimentation Rate%（10min) 17. 11 24.18 32.44 7.69 17.29 26.28  

1. Viscosity Reduction Effect Prepare a water-based resin-free pigment paste and compare the viscosity reduction performance of different dispersants. 2. Effect on Gloss Add the resin-free pigment paste into different resin systems (water-based alkyd resin, styrene-acrylic emulsion, polyurethane dispersion, and epoxy emulsion) to prepare finished paints. Apply the paints on test panels using a drawdown bar. After drying, measure the gloss. 3. Effect on Blistering After Water Immersion After the coated panels are dried, immerse them in water for 7 days. Observe and record the blistering area on the panel surface. 4. Effect on Adhesion After Water Immersion After water immersion, perform a cross-cut test on the coated panels using a cross-cut tester, followed by tape pull-off. Observe and record the area of coating detachment.   Water-Based Resin-Free Pigment Paste Testing     Water-Based Resin-Free Pigment Paste Formulations Carbon Black Paste Titanium Dioxide Paste (R996) Material 6072 6208 578 Material 6072 6208 578 Water 50.9 50.9 50.9 Water 20.7 20.7 20.7 Propylene Glycol 2 2 2 Neutralizer DMEA 0.2 0.2 0.2 Dispersant 17.1 17.1 17.1 Dispersant 4.1 4.1 4.1 Carbon Black MA100 30 30 30 Titanium Dioxide R996 75 75 75 Total 100 100 100 Total 100 100 100   Preparation Method After preparing the formulations, add an equal amount of glass beads. Place the mixture in a shaker and shake for 2 hours.   Fineness (μm)                                                                 6072                             578                               6208 Water-Based Resin-Free White Paste                            ≤15                               ≤15                                ≤15 Water-Based Resin-Free Black Paste                             ≤15                              ≤15                                 ≤15   In both black and white resin-free pigment pastes, Anjeka6072 achieved lower viscosity compared to 6208 and 578, indicating superior viscosity reduction capability.   Water-Based Resin-Free Gray Paste Formulation   6072 578 6208 Water-Based Resin-Free White Paste 10 10 10 Water-Based Resin-Free Black Paste 1 1 1   Preparation of Gray Paste The gray paste was prepared by mixing the white paste and black paste in a ratio of 10:1 (white : black) until a homogeneous mixture was achieved.   Gray Paint Formulation   6072 578 6208 water-based resin 64 64 64 Water 3 3 3 Water-Based Resin-Free Gray Paste   33 33 33   Mix the water-based resin, water, and gray paste in proportion until homogeneous to obtain the gray paint. Apply the paint on a sanded tinplate panel at a wet film thickness of 200 μm.   Gloss Test After Panel Drying Conclusion Anjeka 6072 exhibits gloss performance comparable to 6208 and superior to 578 across different resin systems, with the exception of the styrene-acrylic emulsion system, where it performs slightly less favorably than Xianchuang 578. Overall, Anjeka 6072 has a minimal impact on gloss.   Panel Performance Test After 7 Days of Water Immersion   Water-Based Alkyd Resin System   6072 578 6208 Blistering Area 20% 20% 20%         Cross-Cut Adhesion Test           Detachment Area

EZHOU ANJEKA TECHNOLOGY CO.,Ltd                                          professional additive manufaturer Experimental Record Form Experiment Name:  Viscosity Comparison of 6911A in Various Resin Systems & Silica Powder Temperature/Humidity:   Client:    / Applicant:Mr. Chen Experimental Date: March 23, 2026     objective: Color paste formula   Aluminum oxide,   boron nitride magnesium hydroxide         828 resin 30 22.85 30         solvent 15 36 15 Dimethyl: Butanol 4:1   dispersant 0.2 0.15 0.2         powder material 54.8 41 54.8         total 100 100 100         Experimental Method Stir at 2000 rpm for 15 minutes Test results alumina   6910A 6911A 26013002 26013003       Viscosity moa.s/8℃ 8299 553.3 4209 664       60 ℃ thermal storage for 1 day   6910A 6911A 26013002 26013003       Viscosity moa.s/10℃ 1992 774.3 2213 2435       Settlement situation Slight Soft Sedimentation Slight Soft Sedimentation Slight Soft Sedimentation Slight Soft Sedimentation         boron nitride   6910A 6911A 26013002 26013003       Viscosity moa.s/8℃ 8521 9738 6861 8299       60 ℃ thermal storage for 1 day   6910A 6911A 26013002 26013003       Viscosity moa.s/10℃ 10734 10070 8521 9849       Settlement situation no settlement Settlement 1/9   Settlement 1/7 Settlement 1/8         magnesium hydroxide   6910A 6911A 26013002 26013003       Viscosity moa.s/8℃ 110.7 774.6 332 553       60 ℃ thermal storage for 1 day   6910A 6911A 26013002 26013003       Viscosity moa.s/10℃ 553.3 553 110 664       Settlement situation Hard Settlement Hard Settlement Hard Settlement Hard Settlement       Conclusion For alumina systems, 6911A delivers the optimal viscosity reduction effect, exhibits the lowest viscosity after thermal storage, and ensures consistent anti-sedimentation performance across the board. In boron nitride systems, 6910A provides a moderate viscosity reduction effect while boasting the best overall stability of all tested additives. For magnesium hydroxide systems, 6910A achieves the most significant viscosity reduction; however, all tested formulations show poor anti-sedimentation performance after thermal storage.

EZHOU ANJEKA TECHNOLOGY CO.,Ltd                                                                       professional additives manufacturer Test Record Sheet Experiment Name: Anti-Sedimentation Test of Alcohol-Soluble Polyurethane Resin Pearl Paint Temperature/Humidity: 19/51 Customer: YunnanApplicant:  Ye Kai Experiment Date: March 15, 2026     Objective: To evaluate and select suitable additives for the customer's pearlescent paint system, using ethanol as the thinning solvent, such that the resulting mixture exhibits no visible stratification or settling within a 30-minute timeframe. Color paste formulation ① Alcohol soluble polyurethane resin 10 ② Alcohol soluble polyurethane resin 10 ③ Alcohol soluble polyurethane resin 10 ④ Alcohol soluble polyurethane resin 10 pearlescent powder 10 pearlescent powder 10 4330 polyethylene wax slurry 5 4320 polyamide wax slurry 2.5 Anjeka 6860 0.3 Anjeka 6881 0.3 pearlescent powder 10 pearlescent powder 10 isopropanol 10 isopropanol 10 isopropanol 10 isopropanol 10 ethanol 69.7 ethanol 69.7 ethanol 65 ethanol 67.5                                 Experimental Method 1. Formulation 1: Add 6860 dispersant and stir until homogeneous. 2. Formulation 2: Add 6881 dispersant and stir until homogeneous. 3. Formulation 3: First, mix 4330 with the resin and disperse at high speed until the fineness reaches

Selecting the right defoamer is a critical, yet often challenging, decision for formulators in the coatings, inks, and adhesives industries. The choice between silicone defoamers and non-silicone (polymer-based) defoamers can significantly impact not only foam control but also final film properties like adhesion, gloss, and recoatability. Making the wrong choice can lead to devastating defects such as crawling, cratering (fish eyes), and silicon contamination. This technical guide will demystify the key differences, advantages, limitations, and optimal application scenarios for each type, empowering you to make an informed selection for your specific system.   1. Understanding the Core Chemistry: How They Work Both types function by entering and destabilizing the foam lamella, but their base chemistry dictates their behavior. Silicone Defoamers (Organic Silicone Defoamers): Typically based on polydimethylsiloxane (PDMS) oils, often compounded with hydrophobic silica. They are highly surface-active and insoluble in most coating systems. Their low surface tension allows them to spread rapidly over the foam film, displacing the stabilizing surfactants and causing bubble collapse. They are renowned for their powerful, persistent defoaming and antifoaming action, especially against microfoam. Non-Silicone Defoamers (Polymer Defoamers): These are usually based on hydrophobic polymers, mineral oils, or polyethers. They work primarily by a mechanism of “bridging” the foam film or by entering the lamella and promoting drainage. They are generally designed for better compatibility within the host system, minimizing the risk of surface defects associated with low surface tension materials. 2. The Great Trade-off: Efficacy vs. Compatibility The selection often revolves around balancing raw defoaming power with the risk of side effects. When Silicone Defoamers Excel (And Their Risks): Pros: Superior defoaming efficiency, especially in high-viscosity systems, water-based coatings, and emulsions. Excellent long-term foam inhibition. Effective at low dosage. Cons: High risk of causing surface defects like craters or crawling due to extreme surface tension reduction. Can lead to poor intercoat adhesion (recoatability). May cause water spotting or affect gloss uniformity. Compatibility must be rigorously tested. When Non-Silicone Defoamers Are the Safer Choice (And Their Limits): Pros: Generally offer much higher system compatibility. Drastically lower risk of inducing crawling or cratering. Usually do not interfere with adhesion or recoatability. Ideal for clear coats and systems where surface perfection is paramount. Cons: Defoaming strength, particularly against persistent microfoam, can be lower than silicone types. May require higher addition levels. Performance can be more system-specific. 3. Application-Based Selection Guidelines Here’s a practical framework to guide your choice based on your formulation and process: Choose a Silicone Defoamer If Your Priority Is: Maximum Defoaming Power: In thick paste adhesives, sealants, high-solids coatings, or textured paints where foam is severe. Aqueous Systems: Many general-purpose waterborne industrial coatings and architectural paints where the risk of silicone-related defects is manageable. Process Foam: Controlling foam in mixing tanks, during pumping, or filling operations. Opt for a Non-Silicone Defoamer If Your Priority Is: Surface Perfection: In automotive topcoats, high-gloss industrial finishes, wood coatings, or any application where craters are unacceptable. Critical Adhesion/Recoatability: In can coatings, coil coatings, plastic substrates, or multi-layer systems where intercoat adhesion is vital. Specific Chemistries: In epoxy systems, UV-curable formulations, and some polyurethane systems, where silicone compatibility is notoriously problematic. (At Anjeka, for instance, we often recommend a non-silicone defoamer like Anjeka 5530 for epoxy systems to ensure flawless results). Predictable Compatibility: When formulating a new system and you need a “safer” first option to minimize defect risks during development. 4. Beyond the Binary: Advanced Considerations and Synergies The choice isn't always either/or. Advanced formulating involves deeper nuances: Modified Silicones: Some defoamers use modified silicone polymers that offer a middle ground—better compatibility than traditional PDMS while retaining strong defoaming characteristics. Synergy with Other Additives: Often, the root cause of surface defects is a combination of foam and poor wetting. An effective strategy is to combine a carefully selected defoamer (silicone or non-silicone) with a powerful wetting and leveling agent. For example, using a wetting agent like Anjeka 7411 can compensate for surface tension gradients and work synergistically with the defoamer to achieve a perfectly flat, defect-free film. Testing is Non-Negotiable: Regardless of the guideline, compatibility testing is essential. Evaluate not only initial foam knockdown but also long-term stability, film clarity, gloss, and adhesion after full cure. 5. Anjeka’s Perspective: Providing the Right Tool for the Job At Anjeka, we believe in providing a comprehensive toolbox. We offer a full spectrum of both high-performance silicone defoamers (e.g., Anjeka 5680A for powerful action) and specialized non-silicone defoamers (e.g., Anjeka 5530 for epoxy, Anjeka 5053 for PU/Acrylic). Our technical data, including results on viscosity stability and thermal storage tests, helps customers validate performance in their specific applications. Our goal is not to sell one type over the other, but to partner with you to select the most effective and safe defoaming solution that aligns with your formulation goals, process conditions, and end-product requirements.

On the path to pursuing high-performance coatings and composites, formulation engineers often battle a series of "stability" issues: Why do meticulously formulated colors consistently fall short of the desired gloss and saturation? High system viscosity severely impacts application efficiency and final leveling. In complex multi-component resin systems, phase separation acts like a ticking time bomb, threatening product uniformity and reliability. In high-end carbon fiber composites, fiber wetting directly determines the strength and quality of the final product. These seemingly independent pain points collectively point to the core need for precise control over the interactions between components within a system. Today, we focus on a wetting and dispersing agent that can multi-dimensionally enhance system stability – Anjeka Anjeka-6976, and see how it becomes the "all-around stabilizer" in formulations.   I. The Guardian of Color's Soul: Ending Pigment Flocculation, Unleashing Ultimate Performance Pigment flocculation is the root cause of defects such as floating/flooding, reduced gloss, insufficient tinting strength, and uneven color in paint films. Anjeka-6976 effectively deflocculates and stabilizes pigment particles through a unique steric hindrance stabilization mechanism. It not only breaks down pigment agglomerates, resulting in finer particle size distribution for higher gloss and enhanced color strength, but also simultaneously improves the transparency of transparent pigments and the hiding power of opaque pigments. More importantly, it imparts the same charge to the surfaces of different pigments. The resulting electrostatic repulsion, combined with steric hindrance, effectively prevents co-flocculation when multiple pigments are blended, ensuring pure color appearance without floating/flooding in complex pigment systems.This means that whether pursuing deep blackness in automotive coatings or vibrant saturation in industrial coatings, Anjeka-6976 can help you stably present the color soul required by the design.   II. The Efficient Engine of Flowability: Solving the High Viscosity Dilemma, Enhancing Processing Efficiency High viscosity not only increases energy consumption and reduces production efficiency but also affects spray atomization, leveling, and final film thickness consistency. Anjeka-6976 demonstrates outstanding viscosity reduction capability. In coatings and adhesive systems, it significantly reduces grinding paste viscosity, improves flow properties, and allows you to increase pigment content in color pastes, thereby enhancing formulation solids or economic benefits. In the production of thermoplastic plastic masterbatches, its viscosity reduction effect is equally significant, imparting more ideal Newtonian flow characteristics to the grinding paste, helping to improve processing torque, increase output efficiency, optimize melt flow rate (MVR), and enhance dispersion quality. Choosing Anjeka-6976 is equivalent to installing a "flowability engine" for your production process, making material handling smoother and the processing window wider.   III. The Stabilizing Pillar of System Uniformity: Preventing Phase Separation, Ensuring Long-Term Stability In composite material systems like unsaturated polyesters, phase separation can occur between resins and additives or different polymers due to compatibility issues, leading to product stratification, inconsistent performance, or even failure. Anjeka-6976 plays the role of a "compatibility promoter" and "stabilizer" in this field. It effectively prevents phase separation of different thermoplastic plastics in various unsaturated polyesters, particularly suitable for low-VOC formulations with strict requirements. By adding a small amount of Anjeka-6976 (0.3-1% based on resin amount), the uniformity and storage stability of complex resin systems can be greatly enhanced, laying a solid foundation for reliable processing in SMC/BMC and other processes and the consistency of final product performance.   IV. The Strength Foundation of Composites: Optimizing Carbon Fiber Wetting, Empowering High-End Manufacturing Whether the excellent performance of carbon fibers can be fully realized in composites largely depends on the degree of wetting and encapsulation by the resin matrix. Poor wetting leads to weak interfacial bonding, becoming stress concentration points and affecting the mechanical properties of the product. Anjeka-6976 is recommended for improving carbon fiber wetting. In processes such as SMC (Sheet Molding Compound) and pultrusion, adding Anjeka-6976 at 0.5-1% based on fiber content can promote rapid and thorough resin impregnation of carbon fiber bundles, reducing interfacial defects, thereby enhancing processing reliability and ultimately obtaining composite products with higher strength and superior performance.   From imparting stunning color and gloss to coatings to ensuring the robust and reliable structure of composites, stability is the golden rule throughout. Anjeka Anjeka-6976 wetting and dispersing agent, with its unique "multifunctional" advantage, provides you with a comprehensive stability solution spanning the coating and composite material fields.   If you are currently facing: Poor pigment dispersion, insufficient gloss, color floating/flooding? Excessively high system viscosity, affecting application and production efficiency? Complex resin formulations, concerned about phase separation during storage or use? Difficulty in wetting carbon fiber composites, needing improved interfacial strength?   The Anjeka technical team is always ready to support you: Obtain Detailed Technical Information: Gain an in-depth understanding of the product characteristics and application guidelines of Anjeka-6976. Apply for Free Samples: Conduct verification tests for your specific system and personally experience its stabilizing effects. Technical Consultation and Formulation Optimization: Our application engineers can provide one-on-one technical support to assist in solving complex stability challenges.