The discussions will cover four product areas: Water-based coatings and varnishes Customized coating solutions for specific applications Whether the project involves printing, textiles, cookware, bakeware or other industrial coating applications, the aim is to understand the production requirements and agree on practical next steps for product evaluation. Meeting dates October 22-24, 2026 Email sales@sinogracechem.com

Why Do Your Exterior Coatings Keep Failing? Are Your Binders and Additives Compatible? Uneven color in stone effect coatings, unwanted gelling during storage of multicolor paints, rain streaks on elastomeric finishes, and excessive aggregate loss during spraying—these problems can affect both coating quality and application efficiency. When trouble shooting, it is important to check how well the emulsion binder works with the additives in the formulation. Why Does Binder–Additive Compatibility Matter? The emulsion binder forms the coating film and influences adhesion, water resistance, and weathering performance. Additives are used in smaller amounts, but play essential roles in pigment dispersion, viscosity control, and foam management. These ingredients need to work together within the complete formulation to achieve consistent storage stability, application performance, and film properties. Four Common Problems—and What to Check 1. Patchy or uneven color Check pigment dispersion and compatibility between the binder and additives. In cool or humid conditions, pay particular attention to temperature, humidity, and drying time. 2. Excessive thickening during storage Poor interaction between the binder and thickening system can cause viscosity to rise during storage, making the coating difficult to apply. Tracking viscosity over time can help identify when the problem develops. 3. Rain streaks on the coating surface Rain exposure before the film has dried sufficiently can extract and redistribute water-soluble ingredients, leaving visible streaks. Both formulation composition and drying conditions should be evaluated. 4. Excessive spatter and aggregate loss Review the binder, thickening system, overall formulation, and spray settings together. Application trials are essential for confirming whether an adjustment improves performance. Published Research: Same Binder, Different Results A study published in PCI in 2021 compared three formulations made with the same binder. Films were dried at 25°C and 50% relative humidity, then evaluated for surfactant leaching. Surfactant leaching resistance ratings: 1–5, with 5 being best. Formulations using the same binder After 2 hours of drying After 4 hours After 24 hours Formulation 1 1 1 1 Formulation 2 5 5 5 Formulation 3 4 4 5 Source: Understanding Surfactant Leaching in Architectural Coatings*, Figure 13, PCI, 2021 Under these test conditions, the coatings showed different resistance to surfactant leaching despite using the same binder, highlighting the importance of evaluating the complete formulation. Three Steps to Selecting Binders and Additives Step 1: Start with the application. Stone effect coatings, multicolor paints, and elastomeric exterior paints have different requirements. Identify the main performance issue before selecting materials. Step 2: Check compatibility in the formulation. Keep a reference formulation and change one ingredient or dosage at a time. Compare viscosity, storage stabilit...

SINOGRACE CHEMICAL | High-Solid-Content Waterborne PU Resin for Textiles PF-402 1. Product Overview PF-402 is a solvent-free, non-yellowing, polyester-based waterborne polyurethane (PU) resin. It is designed for textile printing, flocking, glitter printing, fabric lamination, and PET heat transfer printing applications. With high solid content, excellent flexibility, and good resistance to washing and solvent wiping, PF-402 is suitable for textile finishing processes requiring durable coatings and strong adhesion. 2. Key Benefits High Solid Content for Thick Applications With a solid content of 60±1%, PF-402 is suitable for thick-film and machine printing applications. Its high solid content helps reduce drying demands and improve production efficiency. It can also be used in PET heat transfer printing ink systems. Good Wash and Solvent Resistance Finished prints, heat transfer designs, and laminated fabrics exhibit good resistance to washing and solvent wiping, helping reduce coating peeling and edge lifting during subsequent processing. Excellent Flexibility and Mechanical Strength PF-402 offers a tensile strength of over 40 kg/cm² and elongation at break above 800%. Its flexible film helps accommodate stretching and bending, making it suitable for elastic fabrics, denim, and other stretchable textiles. Designed for Textile Compliance Requirements The product features very low reported levels of organic solvents and formaldehyde, with NPEO and the specified eight heavy metals controlled according to product specifications. It is designed to support textile processing applications subject to domestic and international restricted-substance requirements. Compliance should be verified against the applicable test reports and market standards. 3. Technical Specifications Parameter Typical Value Viscosity 300–1,800 cP pH 8 ± 1 Solid Content 60 ± 1% 100% Modulus 20 ± 8 kg/cm² Tensile Strength >40 kg/cm² Elongation at Break >800% Organic Solvent Content Approximately 0% Formaldehyde Content Approximately 0% Eight Specified Heavy Metals 0% as stated in the product specification NPEO Content 0% as stated in the product specification Note: Values are typical product specifications and should be confirmed against the latest technical data sheet and test reports. 4. Applications PF-402 is suitable for: Textile printing on nylon, polyester, elastic fabrics, and denim Glitter printing and flocking Fabric bonding and lamination Thick-film and machine printing PET heat transfer printing inks 5. Recommended Use To improve film strength, adhesion, and durability, a suitable crosslinker may be added after compatibility testing. Isocyanate crosslinker: 2–5% Aziridine crosslinker: 0.5–1% Addition levels are indicative. Actual dosage should be optimized according to the crosslinker type, formulation, substrate, and processing conditions. Please follow the crosslinker supplier’s safety instructions. 6. Packaging and Storage Packaging: 120 kg per drum Storage: Sto...

Low Initial Tack in Water-Based PSAs: When Should You Add a Rosin Tackifier Dispersion? A label lifts at the edges shortly after application. A tape bonds well to cardboard but peels easily from plastic packaging. When adhesive manufacturers encounter these problems, they need to check the substrate and processing conditions, as well as whether the formulation provides enough tack and peel strength. Water-based rosin tackifier dispersions are commonly used in water-based adhesives. When the base polymer forms a film properly but does not provide the required adhesion, a compatible tackifier dispersion can help adjust its performance. What Is the Difference Between Low Tack, Low Peel Strength, and Poor Holding Power? Customers may describe all three as “poor adhesion,” but each calls for a different approach. Problem Property to Check Role of the Tackifier Dispersion Labels lift immediately and require repeated pressing Initial tack A suitable tackifier can improve adhesion after brief contact Tape peels off easily after application Peel strength Can improve peel adhesion to the target substrate Labels or tape slip under a sustained load Holding power and cohesive strength Adding more tackifier alone may not solve the problem; the base polymer and overall formulation need to be checked Initial tack describes how readily the adhesive bonds after brief contact. Peel strength measures the force required to remove a label or tape. Holding power describes the adhesive’s ability to resist movement under a sustained load. Identifying which property is insufficient helps guide formulation changes. How Does a Water-Based Rosin Tackifier Dispersion Work? Water-based rosin tackifier dispersions are produced by dispersing rosin or modified rosin resin in water through an emulsification process. When blended with a compatible base polymer dispersion, they change the viscoelastic properties of the dried adhesive film, affecting its behavior during contact, bonding, and peeling. They are mainly used to improve tack and peel adhesion in self-adhesive labels, packaging tapes, and other water-based pressure-sensitive adhesives. Certain rosin ester dispersions are used to improve tack and peel adhesion to polyethylene and cardboard in acrylic and carboxylated SBR adhesive formulations. However, a tackifier cannot solve every bonding problem. Surface contamination, insufficient coating weight, or incomplete drying should be addressed first. When Should You Consider Adding One? One situation is when the adhesive forms a film properly, but labels do not stick readily after application and tack test results fall below requirements. Another is when the adhesive performs well on paper but provides insufficient peel strength on the customer’s plastic packaging. A third is when developing a new label or tape adhesive and the base polymer alone cannot provide the required tack. If the main problem is slippage under load, bond failure at elevated temperatures, or adhesive res...