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Bayhydur® XP 2655
Covestro (formerly Bayer MaterialScience) 科思创
Bayhydur® XP 2655 is an hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) used as the hardener for waterborne two-component polyurethane systems. Bayhydur® XP 2655 is a crosslinking agent for waterborne systems from which reliable incorporation and high chemical resistances are required. Despite its relatively low hydrophilia, this hardener can be easily dispersed in the aqueous phase, even at low shear forces such as are typically found in trade applications. Coatings formulated with the product yield films with high gloss and very low haze. The increase in viscosity during mixing that is typical for hydrophilized hardeners, in particular with ionically hydrophilized polyol dispersions, can be controlled by prethinning with water or slight amounts of organic cosolvent.
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Baybond® PU 403
Baybond® PU 403 nionic, non-ionic polyester urethane polymer, used as the filmforming component in glass fibre sizes. It becomes milky white when dispersed in water. This product has a non-volatile content (0.9-1.1g / 1h / 125°C, convection oven) of 39 ± 1, a flow time at 23°C, (4mmcup) of 11-18, and a pH value at 20°C (supply form) of 6.0-8.0.
Baybond® PU 405
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Baybond® PU 406
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