Polyvinyl butyral resin (PVB)

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Polyvinyl butyral resin (PVB)

Polyvinyl butyral resin (PVB)

Overview

Polyvinyl butyral(PVB for short) is the product of acid catalysis of polyvinyl alcohol and butyraldehyde. Because PVB molecules contain long branched chains, they have good compliance, low glass transition temperature, and high tensile strength and impact strength. PVB has excellent transparency, good solubility, good light resistance, water resistance, heat resistance, cold resistance and film formation. It has high adhesion to materials such as glass and metal (especially aluminum). Therefore, it has been widely used in the manufacture of laminated safety glass, adhesives, ceramic paper, aluminum foil, electrical materials, FRP products, fabric treatment agents and other fields, and has become an indispensable synthetic resin material.

General properties

Product name: Polyvinyl butyral resin

CAS:63148-65-2

The appearance of polyvinyl butyral (PVB) resin is white spherical porosity particles or powder, and its specific gravity is 1:1; but the filling density is only 0.20~0.35g/ml.

Applications

PVB is widely used in adhesive safety glass interlayers, rust primers, baking paints, wood paints, printing inks, electronic ceramics and printed circuit board adhesives, metal-to-metal, metal-to-plastic adhesives, hot-melt adhesive modifiers, textile iron-dimensional waterproof processing, etc. New applications in various industries are constantly being developed.

Storage

PVB should be stored in a dry and cool place and avoid direct sunlight, and PVB should be stored to avoid heavy pressure. As long as PVB is not in direct contact with water, it can be stored for two years without affecting its quality.

Technical Data

Item SD-1 SD-2 SD-3 SD-4 SD-5 SD-6 SD-7
Appearance White powder
Viscosity/mPa·s   5~10 11~20 21~30 31~60 61~100 >100
Acetal/% 68~88 68~88 68~88 68~88 68~88 68~88 68~88
Acid value/(mg KOH/g) ≤4.0 4 2 2 1 1 1
Ash/% ≤0.10 0.1 0.08 0.08 0.1 0.1 0.1
Volatile Content/% ≤3.0 3 3 3 3 3 3
Polyvinyl butanol by mass/% ≥98.0 98 98 98 98 98 98

 

 

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