Polyureas made from aminocrotonates

A method comprising:

• reacting a polyisocyanate with a compound having the formula:
• wherein R1 is an organic group;
• wherein R2 is an aliphatic group;
• wherein R3 is an aliphatic group;
• wherein all the polyisocyanates taking part in the reaction are at least 50 mol % aromatic polyisocyanates;
• and
• wherein the reaction forms urea groups from the isocyanate groups of the polyisocyanate and the NH groups of the compound.

A compound having the formula:

• wherein R1 is —(CH(CH3)—CH2—O)x—CH2—CH(CH3)—, —(CH(CH3)—CH2—O)x—(CH2—CH2—O)y—(CH(CH3)—CH2—O)z—CH2—CH(CH3)—, or —(CH2)x—O—CH2—CH2—O—(CH2)x—;
• wherein x, y, and z are nonnegative integers;
• wherein R is —H or —CH2—CH3;
• wherein R2 is an aliphatic group or oxyaliphatic group;
• and
• wherein R3 is an aliphatic group.

A compound having the formula:

• wherein R is —H or —CH2—CH3;
• wherein n, x, y, and z are nonnegative integers;
• wherein R2 is an aliphatic group or oxyaliphatic group;
• and
• wherein R3 is an aliphatic group.