PVB
Polyvinyl butyral
CAS: 63148-65-2
Molecular Formula: C16H28O5
PVB - Names and Identifiers
PVB - Physico-chemical Properties
| Molecular Formula | C16H28O5 |
| Molar Mass | 300.395 |
| Density | 1.08 |
| Melting Point | 165-185°C |
| Water Solubility | insoluble |
| Solubility | Insoluble in water, soluble in ethanol, isopropanol, n-butanol, methoxypropanol, ethoxypropanol, diacetone alcohol; slightly soluble in esters and ketones; insoluble in aliphatic and aromatic hydrocarbons |
| Appearance | White powder |
| Color | White |
| Storage Condition | Room Temprature |
| Stability | Stable. Combustible. Dust may form explosive mixture with air. Incompatible with strong oxidizing agents. |
| Refractive Index | 1.485 |
| MDL | MFCD00084458 |
| Physical and Chemical Properties | Melting point 165-185°C density 1.08 refractive index 1.485 water-soluble insoluble |
| Use | Used as adhesives and coatings |
PVB - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 1 |
| RTECS | TR4955000 |
| HS Code | 39059990 |
PVB - Nature
Open Data Verified Data
The polyvinyl butyral is a hot-melt polymer compound in the form of white or yellowish powder particles. With high transparency, flexibility, high impact strength at low temperature, resistance to sun exposure, oxygen and ozone, wear resistance, resistance to inorganic acids and aliphatic hydrocarbons and other properties, and can and nitric acid fiber, phenolic, urea-formaldehyde, epoxy resins are mixed with the other phase to improve their performance. Soluble in alcohols, ethyl acetate, methyl ethyl ketone, cyclohexanone, methylene chloride and chloroform. It has good cold resistance and adhesion, and has good adhesion to metal, wood, ceramic, leather and fiber. Can be used for the intermediate layer and coating of safety glass.
Last Update：2024-01-02 23:10:35
PVB - Preparation Method
Open Data Verified Data
In industry, polyvinyl alcohol and butyraldehyde are used as raw materials, water is used as medium, hydrochloric acid is used as catalyst, and the temperature is gradually raised to 55 ℃ for condensation reaction, the catalyst was washed off with water, the residual acid was neutralized with alkali, and the product was obtained after drying. In addition, it is also useful to use butyraldehyde and polyvinyl acetate dissolved in an organic solvent. In the presence of an inorganic acid catalyst, polyvinyl acetate is hydrolyzed, followed by simultaneous condensation with butyraldehyde to obtain PVB, which is precipitated after adding water. The method for preparing PVB by the American Sha Winigan Kesin company and Mosanto Chem company is to obtain polyvinyl acetate by the polymerization of monomer vinyl acetate, and then heated in the presence of inorganic acid, hydrolyzed and filtered to obtain polyvinyl alcohol, after acetalization with butyraldehyde, water was added to precipitate PVB.
Last Update：2022-01-01 11:08:20
PVB - Introduction
Polyvinyl butyral is a synthetic resin formed by the condensation reaction of n-butyraldehyde and polyvinyl alcohol high-purity aqueous solution using reagent hydrochloric acid as a catalyst. It is a white powdery solid,
Last Update：2022-10-16 17:27:31
PVB - Use
Open Data Verified Data
It is mainly used for safety glass interlayer, adhesive, coating, etc. 1. The safety glass PVB is plasticized by butylene sebacate, extruded or cast into a transparent sheet, and then pressed with glass to obtain 2 or 5 layers of safety transparent glass. It is used as a windshield for cars and planes, and is resistant to water and aging. It can also be used at -60 °c. 2. The adhesive PVB contains hydroxyl, acetyl and aldehyde groups, which has high bonding performance. A- grade phenolic resin was added into PVB ethanol solution to make adhesive, which can bond metal, wood, leather, glass, fiber and ceramic. And can be made of glass fiber reinforced plastic, instead of steel, aluminum, copper and other non-ferrous metals. 3. Coating PVB not only good adhesion, but also good film-forming, wear resistance, widely used in coatings. Varnish and enamel of PVB with phenolic resins and fillers, used in the automotive industry as metal corrosion-resistant primer coatings. PVB is prepared in a mixed solvent of alcohol and ethyl acetate, which can be used as an anti-Coke coating for casting models, as well as marine ships and submarine hulls, the coating of the buoy of the water plane and the Derrick of the drilling machine immersed in the water. 4. Fiber treatment agent PVB water dispersion containing plasticizer, used as cotton fabric treatment agent, anti-shrinkage agent, wear agent, stiffness agent. Synthetic fiber and cotton fiber are sized with it to make a rain coat, a rain-proof mantle, etc., which is soft, wrinkle-free and resistant to sunlight. Porcelain with the film flower paper with it instead of ceramic flower paper, not only save the process, but also improve the quality of products, fired ceramic patterns bright color, smooth texture. 6. The PVB of the article is compounded with a synthetic rubber such as butadiene rubber, chloroprene rubber or isoprene rubber, and can be molded into an electromechanical part and a hose, a hard pipe, a bar and the like having a high impact toughness and a high elastic modulus.
Last Update：2022-01-01 11:08:21
PVB - Safety
Open Data Verified Data
paper plastic composite bag packaging, 25kg/bag, stored in a cool, ventilated and dry place, to prevent the sun and rain, away from the fire source, can be transported by non dangerous goods.
Last Update：2022-01-01 11:08:21
PVB - Molding Process
Open Data Verified Data
polyvinyl butyral as a plastic product application varieties are mainly film and sheet. The processing method is to knead PVB resin and dibutyl sebacate, and then use the flat head extruder extrusion, body temperature is generally 130~140 deg C, head temperature 140~150 deg C. The extruder is preferably a twin-screw extruder, pre-plasticized first, the pre-plasticized material is fed to the single-screw extruder for further plasticization, and the molded sheet is calendered by a hot roller with an adjustable gap temperature of 140 ° C, then, a PVB film having a uniform thickness was formed, and the film was subjected to a heat-setting treatment at 60 ° C. To shrink and then rolled.
Last Update：2022-01-01 11:08:21
PVB - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | made of safety glass for automotive, It is used to make safety glass, paint, and adhesive to make colorless transparent film. Adhesive. Fabric coating. Protective coatings. safety glass, used for automobile, ship window glass and high-rise building window glass, used as adhesives and coatings, colorless transparent film, fabric coating. Protective coatings. |
Last Update：2024-04-09 20:49:11
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Product Name: Polyvinyl butyral Request for quotation
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