Covestro Desmocoll® 540/4 Polyurethane Adhesive

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Covestro Desmocoll® 540/4 Polyurethane Adhesive
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	Predominantly linear hydroxyl polyurethane. Desmocoll® 540/4 is a flexible polyurethane with an extremely high crystallization rate and very low thermoplasticity. It is characterised by its high green strength and the heat resistance of the bonds. Desmocoll® 540/4 has outstanding adhesion on PVC substrates and high resistance to the most commonly used PVC plasticizers. Properties / Applications: Desmocoll® 540/4 is suitable for the formulation of adhesives for use on various materials, e.g. leather, rubber, textiles, wood, many plastics (including PU elastomers), plastic films and aluminum foils. Information provided by Covestro
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Physical Properties	Metric	English	Comments

Specific Gravity	1.20 g/cc	1.20 g/cc	DIN EN ISO 2811
Viscosity	1500 - 2100 cP	1500 - 2100 cP	15% in butanone-2 (MEK) at 23 °C, Haake; DIN EN ISO 3219/A.3

Processing Properties	Metric	English	Comments
Processing Temperature	15.6 °C	60.0 °F	activation temp; DIN EN 12961

Descriptive Properties
Content	<0.1%		Hydroxyl, DIN 53 240
Crystallization	10		[min], DIN 53 505
Heat resistance	80		[°C], ASTM D816
Hot tack life	4		[min], DIN EN 12961

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PCOVEST0290 / 202073

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