PVB WWW-A-30

Butvar brand resins generally are soluble in alcohols, glycol ethers, and certain mixtures of polar and nonpolar solvents. In general, Butvar B-98 (PVB Resin B-05SY) resin will show the same general compatibility characteristics as Butvar B-90 (PVB Resin B-02HX) and, therefore, should prove advantageous where physical and chemical properties of B-90 are desired but lower solution viscosities are necessary. The same is true for Butvar B-79 in relation to Butvar B-76.     The lower hydroxyl content of Butvar B-76 and Butvar B-79 permits solubility in a wider variety of organic solvents as compared to the other grades of Butvar. One notable exception, however, is the insolubility of Butvar B-76 and Butvar B-79 in methanol. All other types of Butvar contain sufficient hydroxyl groups to allow for solubility in alcohol and in hydroxyl-containing solvents. The presence of both butyral and hydroxyl groups permits solution in mixtures of alcohol and aromatics. Viscosities of Butvar resin solutions containing mixed solvents depend on the ratio of alcohol to aromatic. Viscosity curves for Butvar B-76, Butvar B-90, and Butvar B-98 in Graph 2 show minimum points in the general vicinity of 50% alcohol: 50% aromatic.     A common solvent for all of the Butvar resins is a combination of 60 parts toluene and 40 parts ethanol (95%) by weight. For compositions of Butvar, methyl alcohol will tend to give the lowest viscosity and, therefore, will permit the use of higher solids when used as a component of a solvent blend. When much more than 10% to 15% alcohol is used in a formulation for spray application, blushing may result. They are useful as starting points in the development of solvent blends for the other types.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

The different kinds of Butvar resins have their properties laid out in Tables 1 to 5. These resins come in various molecular weights and viscosities. Butvar 76 and Butvar 79 resins have less hydroxyl content compared to other Butvar options, which gives them better solubility.   Generally, when you swap butyral groups for acetate groups, you get a polymer that repels water better and can handle heat more without deforming. This change also boosts the polymer's strength and how well it sticks to different surfaces. The strong sticking power of polyvinyl butyral resins comes from their terpolymer structure. Since each molecule has a choice of three different functional groups on its surface, the likelihood of adhesion to a wide range of substrates is significantly increased.   Although polyvinyl butyral resins (PVB) are generally thermoplastic and soluble in a number of solvents, they can be crosslinked by heat and small amounts of mineral acid.Crosslinking often happens through transacetalization, but it can also be due to more complicated processes, like reactions between acetate or hydroxyl groups on nearby chains.   In practice, crosslinking of polyvinyl butyrals is achieved by reaction with various thermosetting resins such as phenolic, epoxy, urea, dicyanate, and melamine resins. The availability of functional hydroxyl groups in Butvar resins for this type of condensation is an important factor in many applications. Including even a small amount of Butvar resin in thermosetting compositions will significantly improve the strength, flexibility, and adhesion of the cured coating.     Polyvinyl butyral films are known for their great resistance to various substances like aliphatic hydrocarbons and different kinds of oils, except for castor and gypsum oils. They tolerate strong bases, but are sensitive to strong acids. However, when used as components of cured coatings, their resistance to acids, solvents and other chemicals is greatly increased. Butyral withstands temperatures up to 200°F for long periods with little color change.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

Polyvinyl butyral resin (PVB) is a white powder made from polyvinyl alcohol (PVAL) and butyraldehyde.  Polyvinyl butyral (PVB) is a white powder made from polyvinyl alcohol (PVA) and butyraldehyde. PVB is primarily used in the production of interlayer films for laminated glass , as well as in coatings  and adhesives.   Currently, global PVB resin production is concentrated in the United States, Western Europe, and Japan, with the U.S. being the largest producer and consumer. China started its PVB industry in the 1950s, but it didn't pick up pace until the breakthroughs in ceramic decals and vacuum aluminum plating during the Seventh Five-Year Plan from 1986 to 1990, which really kicked off growth in the sector. The primary use of PVB resin is as a high-viscosity raw material for PVB films, which serve as interlayers in safety glass. Additionally, it is widely used in coatings, adhesives, ceramic decals, and aluminum foil paper.   PVB films are essential for making safety and bulletproof glass.  These films are placed between regular glass to make safety glass. This type of glass is really strong, flexible, lets light in well, and can handle different weather. It helps stop glass from breaking when it's hit hard, making it safer. PVB-laminated safety glass is clear and resistant to water and aging, performing well even in very low temperatures.  It can also serve as a substitute for acrylic.   PVB has certain chemical groups that give it strong adhesive properties, making it great for various adhesives used in glass, metal, enamel, and labels.   More people are getting filter-tipped cigarettes as their living standards improve. To promote better health, officials are now making it a rule that all premium cigarettes must have filters. This means there's a big jump in the use of tipping paper and, as a result, more PVB adhesive is being used too.   PVB can be mixed with other resins to improve bonding, creating adhesives for a range of materials including wood, ceramics, metals, plastics, and leather.   Due to its high bond strength, cold resistance, oil resistance, wear resistance, and corrosion resistance, PVB (PVB Resin B-03HX & Butvar B-79) is widely used in wood coatings, metal coatings, metal primers, metal inks, foil coatings, vacuum metallization coatings, concrete coatings, waterproof coatings, leather coatings, and glossy surface protective coatings.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

Polyvinyl Butyral Resin (PVB) resin, a versatile and highly adaptable material, has found its way into a myriad of applications across various industries. Its unique properties, such as transparency, durability, and adhesion, make it an indispensable component in modern manufacturing and technology.   PVB resin is widely used as an interlayer material in the production of safety glass. This type of glass boasts exceptional transparency and high impact resistance, making it ideal for applications in the aerospace and automotive sectors. Whether it’s for airplane windows or car windshields, PVB resin-based safety glass ensures both clarity and durability, providing an extra layer of protection in high-stakes environments.   In the realm of protective coatings, PVB resin plays a crucial role in manufacturing anti-corrosion and anti-rust paints. These coatings are known for their strong adhesion, excellent water resistance, and ability to withstand harsh weather conditions. Additionally, PVB resin is used to create metal primers and cold-resistant paints, ensuring that structures and machinery remain intact and functional even in extreme environments.   PVB resin is a key ingredient in the production of vibrant decorative films, which can serve as an alternative to traditional ceramic decals. These films are not only visually appealing but also highly durable. In the PVB resin industry, it is also used to create molding compounds that can replace metals like steel and lead. Furthermore, PVB resin-based adhesives are widely employed for bonding materials such as wood, ceramics, metals, plastics, leather, and laminated composites, showcasing its versatility.   The textile industry benefits from PVB resin in the form of fabric treatment agents and yarn tubes, which enhance the quality and durability of textiles. In the food industry, PVB resin is used to produce non-toxic packaging materials, ensuring the safety and integrity of food products. Its non-toxic nature makes it an ideal choice for packaging sensitive items like tea and cigarettes, where odor retention is a concern.   In the paper industry, PVB resin is utilized as a paper treatment agent, improving the strength and quality of paper products. Additionally, it is used to create anti-shrinkage agents, stiffening agents, and other waterproof materials, further expanding its utility in industrial applications.   PVB resin’s solubility in alcohols and non-toxic nature make it a preferred choice in the printing industry. It is compatible with various printing techniques, including flexography, gravure, letterpress, screen printing, and heat transfer printing. Its ability to produce odor-free prints makes it suitable for packaging sensitive items like tea and cigarettes. Moreover, its cationic properties allow it to adhere strongly to glass surfaces, making it particularly effective for glass decoration through screen printing.   From enhancing the safety of vehicles and aircraft to revolutionizing the printing and packaging industries, PVB (Butvar B-76 & B-03HX) has proven to be a material of immense value. Its adaptability, combined with its eco-friendly and non-toxic characteristics, ensures that it will continue to play a pivotal role in shaping the future of technology and industry. As research and innovation progress, we can only expect to see even more groundbreaking applications of this remarkable material.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com