Daily Quiz (47)


Jerome Curran investigated pull-off strength when looking at polysiloxane alternatives to polyurethane systems used at:


In a JPCL article, Dudley Primeaux concludes that this type of coating holds up both elastomeric and appearance properties when exposed to ultraviolet light.


True or false: Aliphatic polyurea coatings provide UV stability both for their elastomeric properties and also for color and gloss retention.


True or false: When used as reflective roof coatings, polyureas provide more heat resistance than polysiloxanes.


True or false: The ability to wet the substrate upon application is one of the weakest performance properties of polyurea coatings.


True or false: The first large-scale application of polyurea coatings was on the Morgan Whyalla Pipeline in Australia.


True or false: Among reflective roof coatings, polyureas have the most heat resistance, according to a D+D article.


True or false: In atmospheric weathering exposures, aromatic polyureas perform much better than aliphatic polyureas in retaining elastomeric properties.


True or false: Polyaspartic coatings cure more slowly than polyureas.


True or false: Polyurea coatings are among the three most commonly specified generic coating types for spray foam roofing.


True or false: A polysiloxane coating is a version of the larger generic class of polyureas.


True or false: Aromatic polyureas formulated as thick-film elastomers lose a significant portion of their elastomeric properties when subject to atmospheric exposure for long periods.


True or false: A polyurea coating material showed excellent performance in a five-year inspection of a lining system on a potable water tank bottom that had suffered significant soil-side corrosion in Melbourne, Australia.


True or false: Aliphatic polyurea coatings achieve good color and gloss retention in UV exposure but their elastomeric properties degrade quickly in UV exposure.


True or false: According to a D+D article, you can drive on a polyurea-coated floor or use a coated product within 12 hours of application.


What is another name for aliphatic polyurea?


ASTM has three specifications for elastomeric coatings to be used over spray polyurethane foam roofing. Which of the following generic types is not included?


True or false: Wet film thickness gages are inadequate for measuring thickness of fast-set polyurea coatings.


True or false: According to a recent D+D In Depth article, spray-applied polyurea roof coating can be walked on within 10 seconds after application.


True or false: Polyurea coatings require use of low-voltage holiday detectors for continuity testing.


True or false: One of the main strengths of polyureas is their ability to wet out a substrate.


True or false: The installed cost of thick-film resinous coating systems, such as high-build epoxies and polyureas, on concrete floors ranges from $3.50 to $7.00 per square foot, according to a recent D+D In Depth article.


True or false: Polyaspartic coatings cure more quickly than polyureas.


True or false: Among the performance properties of polyureas, according to a JPCL article by Mike O’Donoghue and Vijay Datta, tolerance of low-temperature application is the weakest.


True or false: Aliphatic polyurea coatings provide UV stability for their elastomeric properties but not for color and gloss retention.


Among the performance properties of polyureas, according to a JPCL article by O’Donoghue and Datta, which of the following is the weakest?


True or false: Aromatic polyureas formulated as thick-film elastomers retain a significant portion of their elastomeric properties when subject to atmospheric exposure for long periods.


Which of the following coating types is a hybrid polyurea?


True or false: According to a recent D+D article, the hybrid polyurea coating called polyaspartic has a pot life of up to two hours.


True or false: Another name for a polyaspartic coating is a hybrid polyurea.


True or false: Aliphatic polyureas do not have good color and gloss retention.


True or false: The working time or gel time of a polyurea coating is generally 10 seconds or less.


True or false: A polysiloxane is an aliphatic polyurea.


True or false: A polyaspartic coating is an aliphatic polyurea.


True or false: One system used to repair cracked concrete in a secondary containment structure was a geotextile coated with polyurea.


What is another name for an aliphatic polyurea coating?


Among the performance properties of polyureas, according to a recent JPCL article by O’Donoghue and Datta, which of the following is the weakest?


True or false: Aromatic polyureas formulated as thick-film elastomers retain a significant portion of their elastomeric properties when subject to atmospheric exposure for long periods.


A polyaspartic coating is a version of what larger generic class?


True or false: The main difference in properties between a polyurethane and a polyurea is the amount of hydrogen bonding.


Which of the following coating types might also be classified as a hybrid polyurea?


What is the alpha-numeric designation of the recently published SSPC standard describing recommended best practice in applying plural component polyureas and polyurethanes?


Which of the following is a hybrid polyurea?


What is one main difference between aromatic and aliphatic polyureas?


True or false: According to testing reported by Dudley Primeaux, properly formulated aliphatic polyurea coatings provide UV stability for their elastomeric properties but not for color and gloss retention.


True or false: Polyurea coatings tend to be slow-curing materials.


What organization authorizes and issues the label "Pure Polyurea" to distinguish the pure forms of the product from hybrid polyurea-polyurethane products?


 
 
   

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