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Daily Quiz (33)


Which of the following polyurethane types tend to yellow in sunlight?


What type of polyurethane yellows and chalks in direct sunlight?


True or false: Oil-modified urethanes, or uralkyds, are chemically curing materials.


True or false: Aromatic polyurethanes are designed mainly for indoor applications.


True or false: High-performance polyurethanes, polyaspartics, polysiloxanes, and fluoropolymers are best bets to retain gloss and color for long periods in atmospheric exposure.


True or false: Direct-to-metal polyurethane coatings are available in waterborne formulations.


Which of the following isocyanates is used in polyurethane coatings?


True or false: A uralkyd is a moisture-cured polyurethane.


True or false: Closed-cell, spray-applied polyurethane foam can be used as insulation but not as an air barrier.


True or False: Common factory-applied finishes over hot-dipped galvanized steel include polyester, acrylic, fluoropolymer, plastisol, and polyurethane.


Scrubbable waterborne polyurethanes for use on walls in hospitals are available in a matte finish.


Which of the following polyurethane types tends to yellow in sunlight?


In coatings, “American process” and “French process” refer to the creation of what material?


True or false: A zinc silicate primer is classified as an organic zinc-rich primer.


True or false: Aromatic polyurethanes exhibit better weathering properties than aliphatic polyurethanes.


Polyurethanes are formed by the reaction of an isocyanate with a hydroxyl-containing substance. What is another name for this hydroxyl-containing substance?


What is the relationship between a polyol and a polyalcohol?


TDI and MDI are two types of what coating ingredient?


What resin chemistry is suitable for development of coatings that can be successfully applied to stucco?


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


What type of isocyanates contribute to strong UV resistance in polyurethane coatings?


True or false: Aliphatic polyurethanes exhibit gloss and color retention better than aromatic polyurethanes.


An oil-modified polyurethane is sometimes called by what name?


True or false: Aliphatic polyurethanes tend to retain color and gloss better than aromatic polyurethanes.


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


True or false: Polyurethanes were developed about 75 years ago by Dr. Otto Bayer and colleagues at IG Farben in Germany.


A variation on polyurethane coating chemistry that allows for faster curing times and higher film builds has what name?


True or false: Single-component polyurethane coatings are always waterborne.


Which of the following polyurethane types tends to yellow in sunlight?


True or false: Polyurethanes formulated with aromatic polyisocyanates tend to have very strong weathering capabilities.


True or false: Aromatic polyurethanes tend to retain gloss and color better than aliphatic polyurethanes


True or false: A clear polyurethane used to seal a coated concrete surface should exhibit maximum turbidity.


True or false: Polyurethane topcoats usually have good abrasion resistance.


 
 
   

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Dow Polyurethane Systems
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