PVB

Base Information

• Chemical Name: PVB
• CAS No.: 63148-65-2
• Molecular Formula: C16H28O5
• Molecular Weight: 0
• Hs Code.: 39059990
• Mol file: 63148-65-2.mol

Synonyms:B 33305;B 51S;BL 1;BR 80(polyacetal);BX 55Z;Bakelite XYHL;Butacite;Butacite BE 1028;Butvar;Butvar 9VB;Butvar B 73;Butvar B 79;Butvar B 90;Butvar B 98;Butvar D 510;Butvel;Butyral (polymer);Butyral resins;Butyrals;Ceramo TB 13;Denka 6000C;Denka Butyral;Denka Butyral 2000;Denka Butyral 2000-2;Denka Butyral3000K;Denka Butyral 3001;Denka Butyral 300K;DenkaButyral 400-1;Denka Butyral 4000-2;Denka Butyral 5000;Denka Butyral6000AP;Denka Butyral 6000C;Denka Butyral K 3000;Denka Butyral KY 24;Denka PVB 3000-1;Ecocite G;Ecocite H;Ferro 75001;HS 3Z;Hipol B 30;IVL 1;K 2841;K 2903;K 323MTP;KA;KA (polyacetal);KS 23Z;KW 10;LA (acetal);LL 145;Mowital 30HH;Mowital 45BH;Mowital 60HH;Mowital B 18S;Mowital B 30;Mowital B 60H;Mowital B 60HH;Mowital B 70H;Mowital B 70HH;Mowitop;PSH 1;PSh (vinyl polymer);PVB;PVB 2000L;PVB 300;PVB 4000-1;PVL 212;Pioloform BL 16;Pioloform BL18;Pioloform BS;Pioloform LL 4150;Polyvinyl Butyral resin;

Chemical Property of PVB

Chemical Property:

• Appearance/Colour: White powder
• Melting Point: 165-185°C
• Refractive Index: 1.485
• PSA: 18.46000
• Density: 1.08
• LogP: 1.93800
• Water Solubility.: insoluble

Purity/Quality:

98%Min ^*data from raw suppliers

Polyvinyl butyral ^*data from reagent suppliers

Safty Information:

• Pictogram(s): 36/37/38:
• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36-24/25

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Uses: The main application of poly(vinyl butyral) is as interlayers in safety glass laminates. In this application, a pure (colourless, light-stable) product with high hydroxyl content (for good adhesion) is required. Such material is preferably prepared from poly(vinyl alcohol) rather than directly from poly(vinyl acetate). In a typical process, completely hydrolysed poly(vinyl alcohol) is suspended in ethanol and then butyraldehyde and a small quantity of sulphuric acid (catalyst) are added. The mixture is heated at 800℃ for 6 hours. Water is then added to the product with rapid agitation and the poly(vinyl butyral) is precipitated as granules, which are washed with alkali and dried. Poly(vinyl butyral) is generally softer than poly(vinyl formal) with lower softening point, hardness and tensile strength. In commercial polymers the hydroxyl content exerts a major influence on the solubility characteristics. Most grades are soluble in alcohols, glycol ethers and dioxan and as the hydroxyl content decreases the polymers become more soluble in ketones and esters. Poly(vinyl butyral) used in safety glass generally has 78-80% butyral content, 18-19% hydroxyl content and less than 2% acetate content. For this application the polymer is plasticized with an ester such as dibutyl sebacate to the extent of about 30 parts of plasticizer per 100 parts of polymer; the compound is then sheeted by calendering. To produce safety glass, the sheet is placed between two pieces of glass and the laminate is then bonded under heat and pressure.