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Polyurethane raw materials for decorative gravel and terrazzo coatings

The application of a decorative gravel or terrazzo floor fixed with a coating resin can be a challenge due to the fact, that film thicknesses of 3-10mm are rather common and proper drying and crosslinking still need to be achieved. In addition, the usual properties such as good adhesion and compatibility with anhydrous materials and fast curing speeds are also required. The polyurethane raw materials of Bayer MaterialScience meet these challenges and still allow enough formulation flexibility.

Select products:

	Type	Solids in %	% NCO or OH on solids	Viscosity mPas at 23°C	Characteristics
Desmophen® VP LS 2249/1	Polyester polyol	100	15.5 OH	1900	For high-quality tough and weather resistant coatings and the bonding of decorative gravel
Desmodur® VL 50	MDI- polyisocyanate	100	32.5 NCO	23 (25°C)	For very elastic self-leveling systems
Desmodur® N 3200	HDI biuret	100	23.0 NCO	2500	Good chemical and weather resistance, very good gloss
Desmodur® E 23	MDI prepolymer	100	15.4 NCO	1800	For moisture curing one-component coatings

Examples of starting formulations:

RR 5355	Decorative gravel (Desmodur® N 3200)

RR 5366	One -component polyurethane synthetic resin mortar, moisture-curing, open-pored, for use as a repair or leveling mortar (Desmodur® E 23)