Name: Polyvinyl Butyral Adhesive Resin PVB-3000
Brand: Coatingsink
SKU: pvb-adhesive-film-resin
Availability: InStock

Question 1

What solvents are recommended for dissolving PVB-3000 in coating formulations?

Accepted Answer

PVB-3000 dissolves readily in lower alcohols (ethanol, n-propanol, isopropanol) and their blends with aromatic solvents (toluene, xylene) or ketones (MEK, cyclohexanone). A 10–15% solution in ethanol/toluene (1:1 by weight) is typical for wash primer and metal lacquer applications. Avoid pure water and pure aliphatic hydrocarbons, as PVB is insoluble in these media.

Question 2

How does the hydroxyl content of PVB-3000 affect crosslinking with isocyanates or melamines?

Accepted Answer

PVB-3000's hydroxyl content of 18–21% (expressed as PVA) provides active –OH groups that react with isocyanate (NCO/OH ratio 1.0–1.2 recommended) or melamine-formaldehyde crosslinkers. Higher hydroxyl content increases crosslink density, improving chemical resistance and cohesive strength. For wash primers, a stoichiometric NCO/OH ratio yields best adhesion to metal while retaining film flexibility.

Question 3

Can PVB-3000 be used as an interlayer resin in laminated safety glass?

Accepted Answer

PVB-3000 is formulated for adhesive films, lacquers, and cast laminating systems rather than the melt-extrusion process used in automotive windshield interlayers, which typically requires plasticized PVB pellets processed at 150–200°C. However, PVB-3000 is well-suited for solution-cast interlayer films, glass-fabric laminates, and structural glazing adhesives where solvent-based film casting is employed.

Butyralization Degree	78–82%
Residual Acetate Content	≤3%
Hydroxyl Content (as PVA)	18–21%
Glass Transition Temperature (Tg)	~72°C
Viscosity (10% in ethanol, 25°C)	2500–3500 mPa·s

Polyvinyl Butyral Adhesive Resin PVB-3000

Specifications

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