Polyurethane coatings for park decks - Desmodur® / Desmophen® meet highest standards

Highly frequented park deck surfaces are subject to extreme wind and weather conditions. Good elasticity and abrasion resistance can be obtained by application of a multilayer polyurethane coating based on products of the Desmodur® and Desmophen® range. This also prevents penetration of oils, brake fluid or de-icing salts, so it gives permanent protection to intensively used surfaces. In addition the formulation can be adapted to produce anti-slip properties, thus increasing safety of exterior park decks during rain.

Bayer MaterialScience has developed raw material systems and starting formulations for park deck coatings, which meet processing and wear-and-tear requirements in a perfect way:

• Long pot life
• Flexible even at low temperatures (-20°C)
• Curing at low temperatures (< 5°C)
• Abrasion resistant
• Waterproof
• Resistance against de-icing salts, oils and brake fluids
• Slip resistance
  

For any national and european regulation on the properties in function of the application and the build-up of the coating please refer to the European Organisation for Technical Approvals (EOTA)

Solvenfree binder systems:

	Type	Solids in %	% NCO or OH on solids	Viscosity mPas at 23°C	Characteristics
Desmophen® 1145	Polyester polyether polyol	100	7.1 OH	2950	Tough but elastic, good chemical resistant, wear resistant
Desmodur® E 15	TDI-prepolymere	100	4.4 NCO	7000	Highly wear resistant
Desmodur® VL 50	MDI polyisocyanate	100	32.5 NCO	23 (25°C)	Very elastic, self-leveling

For waterborn sealers:

Dispersions:

	Type	Solids in %	% OH content on solids	Viscosity mPas at 23°C	Characteristics
Bayhydrol® A 2457	Polyacrylate dispersion	41% in water	1.1	< 100	For waterthinnable two-component systems, sealings for mineral substrates and reaction resins (epoxy, polyurethane)
Bayhydrol® A 2542	Polyacrylate dispersion	50% in water	3.8	2300	For low VOC two-component systems, in combination with aliphatic polyisocyanates
Bayhydrol® A 2546	Polyacrylate dispersion	41% in water	1.7 (on supply form)	< 200	For waterthinnable two-component systems, sealings for mineral substrates and reaction resins (epoxy, polyurethane)
Bayhydrol® A 2646	Polyacrylate dispersion	50% in water/ Dowanol PnB / Triethanolamine (46 : 1,1 : 2,9)	3.8	2300	For low VOC two-component systems, in combination with aliphatic polyisocyanates
Bayhydrol® UH XP 2485	Polyester Polyurethane Dispersion	40% in water	0.2 (on supply form)	-	In combination with reactive resins (EP, PUR) in the formulation of water-reducible two-component coatings and sealers

Polyisocyanate crosslinker for waterbased dispersions:

	Type	Solids in %	% NCO content on solids	Viscosity mPas at 23°C	Characteristics
Bayhydur® XP 2451	Hydrophilic polyisocyanate	100	18.6	1200	hardener for water-reducible two-component coatings and sealers for mineral substrates and reactive resins (EP, PU); or as an additive to enhance the property profile of waterborne coatings systems
Bayhydur® XP 2547	Hydrophilic polyisocyanate	100	22.5	600	For low VOC two-component systems

For many applications additional or other products might be used. The product recommendation depends largely on the specific requirements in your particular application. Our experts can help you find the most suitable product.

A sample starting formulation for a crack-bridging parking deck coating material:

RR 5304

Two-component floor coating, highly elastic (Desmodur® E 15 / DMTDA hardener)

Typical coating system for parking deck:

Have a look at this detailed information:

Presentation "Waterborne, VOC-Free 2K-Polyurethane Systems for Flooring and Building Industry“