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paint and coatings manufacturing: POLYURETHANE RESINS

Versatile Polyurethanes

A lightweight rail system in Germany that uses Covestro’s Pasquick PUR coatings.
POLYURETHANES (PURs) are highly versatile polymers.
Whether they are 2K (a polyol plus an isocyanate) or single
(1K) materials, it is possible to formulate them with a broad
range of viscosities and protective properties. claims a very high coefficient of friction, for antislip prop-
This ensures that they have multiple uses in floor cover- erties, as well as excellent sandability. Areas of application
ings, coatings for cabinets and other wood items, and a include wood, plastics, OPVs, paints, and additives for
range of industrial protective layers. In particular, their gloss reduction.
scuff-resistance, tolerance of chemical attack and general Elastocoat is a spraying system from BASF that can be
durability mean they can last for years without the need used for the reliable and lasting protection of all surfaces
for replacement. such as wood, concrete, bitumen, or steel. The high-
Despite the fact that PUR coatings have been in use for pressure spraying system can be applied to virtually all
60 years, there are still opportunities to tweak their properties. substrates with a corresponding primer.
Modern control over formulations during the production While other materials take a long time to through-harden,
process has extended their versatility, and also allowed some BASF says Elastocoat is tack-free in just a few seconds and
measure of exploration into new capabilities. cures fully in two hours. With these properties, it is the
Alberdingk Boley, Inc. offers its PUR-MATT 970 as a recommended solution for many challenges.
hard, inherent matte polyurethane dispersion. This can be Complicated roof penetrations, skylights, or air-condi-
used in super-matte floor coatings, varnishes or paints. tioning shafts are trouble-spots for leaks. Elastocoat seals
The company says this dispersion can “overcome the the affected areas. Like a liquid film, Elastocoat adapts itself
disadvantages of conventional matting agents.” evenly over the surface geometry of a roof and, BASF says,
The solids content is 34 to 36 percent, and the pH value covers it seamlessly and durably.
varies between 7.0 and 9.0. Viscosity is 20 to 2000 mPas, After preparation of the surface, the polyurea system
and the MFFT is approximately 30 deg. C. is sprayed onto the roof. It covers and seals vertical
It features high optical transparency on dark substrates areas and cures in a few seconds. It is load-bearing after
and produces a hard but flexible film. The company one hour.

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