CAS:63148-65-2

Polyvinyl butyral resin (PVB) is a solvent-based resin synthesized by acetalization reaction of polyvinyl alcohol (PVA ) and butyraldehyde under the action of coal catalyst     General characteristics The appearance of PVB is white spherical porous particles or powder, and its specific gravity is 1:1; but the filling density is only 0.20~0.35g/ml. Thermal properties The glass transition temperature (Tg) of PVB ranges from 50℃ for low overlap to 90℃ for high overlap; this glass transition temperature can also be adjusted to below 10℃ by adding an appropriate amount of plasticizer. Mechanical properties PVB has excellent film-forming properties and gives the coating film quite good properties such as warp strength, tear strength, abrasion resistance, elasticity, flexibility, gloss, etc.; it is especially used in bonding safety glass interlayers, making the glass have strong impact resistance and penetration resistance, and it is still not replaced by other materials. Chemical properties PVB coatings have good water resistance, resistance and oil resistance (resistance to aliphatic, mineral, animal and plant oils, but not castor oil). Because PVB contains high hydroxyl groups and has good dispersibility for pigments, it is widely used in printing inks and coatings. In addition, its chemical structure contains both hydrophobic acetal and acetate groups and hydrophilic hydroxyl groups, so PVB has good adhesion to glass, metal, plastic, leather and wood. Chemical Reaction Properties Any chemical that can react with secondary alcohols will also react with PVB. In a lot of PVB applications, it's common to mix it with thermosetting resins. This helps to strengthen the hydroxyl groups in PVB, making it more resistant to chemicals, solvents, and water. Depending on the type of thermosetting resin and how much you mix with PVB, you can create coatings with different features like hardness, toughness, and impact resistance. Safety Properties Pure PVB is non-toxic and harmless to the human body. In addition, ethyl acetate or alcohol can be used as solvents, so PVB is widely used in printing inks for food containers and plastic packaging in Europe and the United States. Storability Properties As long as PVB is not in direct contact with water, it can be stored for two years without affecting its quality; PVB needs to be stored in a dry and cool place and avoid direct sunlight. Avoid heavy pressure when storing PVB. Solubility Properties PVB dissolves in alcohol, ketones, esters, and some other solvents. The solubility in various solvents varies according to the functional group composition of PVB itself. Please refer to CCP PVB Solvent Solubility Table. Basically, alcohol solvents mix well, but methanol doesn’t blend as easily with substances that have a lot of acetal groups. The more acetal groups there are, the easier it is to mix with ketone and ester solvents. PVB has good solubility in alcohol ether solvents, like Cellosolve. It only partly mixes with aromatic solvents such as xylene and toluene, and it won’t mix at all with hydrocarbon solvents.   PVB (such as PVB SD-2) has good film-forming properties. The coating formed by PVB has excellent properties such as high transparency, elasticity, toughness, strength resistance, oil resistance, flexibility and low-temperature impact resistance.   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 & PVB SD-3) 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