Polyvinyl Butyral (PVB) resin is a water-insoluble thermoplastic polymer known for its excellent binding and film-forming properties. It dissolves readily in a wide range of organic solvents and shows good compatibility with many other polymers. With superior elasticity and optical transparency, PVB suits diverse industrial uses. Both high- and low-viscosity grades are available, with glass transition temperatures tailored to specific applications. Stability can be further enhanced via cross-linking. As a result, PVB serves as a key binder in paints, primers, adhesives, metal powders, and ceramics, as well as an interlayer in laminated safety glass, making it indispensable across multiple industries. Field of Application: Wash Primer PVB-based "wash primer" is widely used on metal surfaces such as storage tanks, ships, aircraft, bridges, dam locks, and electronic appliances. Compared to conventional materials, it offers superior corrosion protection, better adhesion, faster drying, and easier application. Strong anchoring is achieved through a complex interaction of synthetic resin, pigments, phosphoric acid, and metal ions.   Foil Coatings Applying PVB solution onto metal foils (e.g., aluminum, brass, tin, lead, iron) improves mechanical strength, moisture resistance, and printability. Adhesion can be further enhanced by stoving at up to ~140°C.   Wood Paints PVB is widely used in wood sealers and topcoats, imparting toughness, flexibility, and impact resistance. Common blends include PVB with phenolic resins, shellac, or nitrocellulose. As a knot sealer, it prevents terpene and resin bleeding.   Leather Paints Combined with nitrocellulose and plasticizers, PVB provides excellent adhesion, high elongation, and crack prevention while maintaining leather flexibility.   Stoving Paints Blends of PVB with phenolic, melamine, or urea resins are ideal for stoving paints. Adding 5–25% PVB to phenolic resin transforms a brittle film into one with good flexibility, excellent leveling, a pinhole-free surface, and improved alkali resistance.   Powder Coatings PVB blended with epoxy resins improves edge covering and prevents pulverization.   Adhesives PVB-phenolic mixtures bond metal, glass, leather, wood, fabric, paper, and more. After solvent removal, surfaces are heated and pressed together. Typical curing: 160°C for 15–30 minutes.   Printed Circuit Board Adhesives A PVB-phenolic blend meets key PCB adhesive requirements: high peel strength, blister resistance, and good dielectric properties, ideal for bonding phenolic prepregs to copper foil.   Printing Inks PVB is used in gravure, letterpress, and flexographic inks, offering flexibility, strong adhesion, and toughness.   Hot-Melt Adhesives Fusing PVB with plasticizers and fluxing resins produces hot-melt adhesives that form tough, clear films with good adhesive strength.   Ceramic Binders In ceramic electronic components, PVB acts as a binder, providing ...

ISO certification is a credential sought after by any mission-driven and forward-looking company. Following a rigorous audit of the international standardized quality management system, SUNMAN has now fully embraced rule-of-law and science-based management. This significantly improves our operational efficiency and product yield, while rapidly enhancing our economic and social performance. As a result, customer trust in us has been strengthened, which plays a key role in increasing our market share. Obtaining quality system certification serves as a green pass for international trade. For SUNMAN, as China's "One-stop Solution Provider for Ink and Coating", this is a critical step forward. We are dedicated to providing resins, additives, and professional technical services to the coating, printing industries. With this ISO certification, we see major opportunities to enhance our corporate image, internal management, operations, and international trade exchanges. Going forward, we will continue to provide you with more professional and higher-quality services.

Since March 2026, escalating geopolitical conflicts in the Middle East and shipping disruptions in the Strait of Hormuz have sharply pushed up international crude oil prices. On March 9, WTI crude exceeded $110 per barrel, while Brent crude approached $115 per barrel. Rising oil prices have driven up downstream chemical costs across the board. Prices of most chemical products saw broad increases recently, with acrylic acid surging 106% within ten days and 123.6% over the year. PTA currently stands at 7,000 yuan/ton, up 2,000 yuan/ton from early 2026. Core Coatings Raw Materials Rise Across the Board The price hikes have created a cascading effect across the chemical industry chain. Data shows that since early 2026, epoxy resin has risen 7,000–8,000 yuan/ton, curing agent cumulative increases have exceeded 10,000 yuan/ton, and chemical matting agents have surged 20,000 yuan/ton. Titanium dioxide, pigments, and other key materials have also seen significant increases. The powder coatings industry has also been severely impacted. Among polyester resin raw materials, TMA has risen approximately 17,000 yuan/ton (over 100%), while ethylene glycol and isophthalic acid have increased 40% and over 30%, respectively. Epoxy resin raw materials bisphenol A and epichlorohydrin have risen over 40% and nearly 15% from the beginning of the year. Industry experts note that resins account for 60%–80% of coating formulation costs, making it impossible for companies to absorb external price pressures internally. Ink Industry Faces Greater Pressure Global ink giant Sun Chemical announced price increases for nitrocellulose-containing products in Latin America, effective immediately. Nitrocellulose, a key component in solvent-based printing inks, has seen supply tighten sharply as European defense spending priorities divert industrial supplies to military applications. Following Sun Chemical, Hubergroup also announced price increases due to supply chain disruptions and rising energy costs. On the raw materials front for inks, both resins and solvents have seen sharp price increases, with solvent costs rising the most and facing particularly tight supply. Key resin binders have posted steep price gains, while solvent prices — including acetates and aromatics — have continued to climb, with some products becoming increasingly difficult to source. The broad-based surge in raw material costs has further intensified cost pressures on ink manufacturers. Coatings Companies Forced to Raise Prices On March 13, Nippon Paint issued a price adjustment notice, with increases to be implemented in batches starting April 1. Looking ahead, industry insiders generally expect raw material prices to remain high in the short term. Geopolitical uncertainty continues to ferment, with no significant signs of relief in the Strait of Hormuz's navigability. If the conflict becomes prolonged, Qatar's Energy Minister has warned that oil prices could even surge to $150 per barrel. From a fundamenta...