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اوردو
Polyvinyl Butyral（PVB）
Polyvinyl Butyral (PVB) is a product of the condensation of polyvinyl alcohol and butyraldehyde under acid catalysis. Due to the long branched chains in PVB molecules, they have good flexibility, low glass transition temperature, and high tensile strength and impact resistance. PVB has excellent transparency, good solubility, good resistance to light, water, heat, cold, and film formation. It contains functional groups that can undergo various reactions such as saponification of phthalein groups, acetylation of hydroxyl groups, sulfonation, etc. It has high adhesion to materials such as glass and metals (especially aluminum). Therefore, it has been widely used in the manufacturing of laminated safety glass, adhesives, ceramic paper, aluminum foil, electrical materials, fiberglass products, fabric treatment agents, and other fields, becoming an indispensable synthetic resin material
Melting point: 165-185 ℃
Density: 1.08g/cm3
Refractive index: 1.488 (20 ℃)
Water absorption rate: no longer extra than 0.4%
Softening temperature: 60-65 ℃
Glass transition temperature: 66-84 ℃ (varies relying on diploma of polymerization)
Solubility: Soluble in most natural solvents such as alcohols/ketones/ethers/esters, insoluble in carbon hydrocarbon solvents [2]
Application Editing
1. The organized movie is used as a interlayer fabric for making protection glass, which has excellent transparency and excessive have an impact on strength, and is extensively used in the aviation and car fields.
2. Used for manufacturing anti-corrosion coatings, steel base coatings with robust rust resistance, adhesion, and water resistance, as nicely as bloodless resistant coatings.
3. Used to manufacture skinny movie floral paper with vivid patterns, which can exchange ceramic floral paper. The resin enterprise is used to manufacture strain plastics that change non-ferrous metals such as metal and lead, and can be blended into a range of adhesives. Widely used for bonding wood, ceramics, metals, plastics, leather, laminated materials, etc.
4. Used for manufacturing material cure marketers and yarn tubes. The meals enterprise is used to manufacture non-toxic packaging materials.
5. The paper enterprise is used to manufacture paper processing agents. In addition, it can additionally be used to manufacture anti shrinkage agents, hardeners, and different water-resistant materials.
6. It can be used for flexographic printing, gravure printing, embossing, display screen printing, and warmth switch printing in the printing industry. Due to its solubility in alcohols and non-toxicity, the printed merchandise do now not depart any residual odors, and can be used for packaging touchy to odors in the meals industry, such as tea/cigarettes. Due to the cationic nature of the resin, it has tremendous adhesion to glass surfaces with sturdy anions, making it specially appropriate for ornamental display screen printing on glass panels.
