Secondary aspartic acid amide esters
Assignee3M Innovative Properties Company
InventorsRichard G. Hansen, Dean M. Moren, Mark D. Purgett
Life of this patent
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Abstract
New secondary amines are described which are prepared from inexpensive, commercially available raw materials, are stable at room temperature, and are reactive toward electrophiles. The secondary amines are prepared by the addition of one or more primary amines with one or more male (amide/ester) and fumar (amide/ester) Michael receptors. The above amines can be used as coreactants with aliphatic polyisocyanates for polyurea coatings. The novel secondary amines are also described as particularly useful as part of a two-part liquid pavement marking composition for pavement markings.
Claims18
A polyurea coating composition comprising
- a) a polyisocyanate component and
- b) an isocyanate-reactive component comprising at least one compound of the formula ##STR14## wherein i) X is alkyl, alkylene, aryl or arylene with a valency of n;
- ii) R.sub.1, R.sub.2, R.sub.4 and R.sub.5 are each independently selected from the group consisting of hydrogen, an alkyl group of 1 to 20 carbon atoms and an aryl group;
- iii) R.sub.3 is either alkyl or aryl;
- and
- iv) n is an integer greater or equal to one.
A two-part liquid pavement marking composition comprising:
- a) an amine component comprising one or more amines of the formula ##STR15## wherein i) X is alkyl, alkylene, aryl or arylene with a valency of n;
- ii) R.sub.1, R.sub.2, R.sub.4 and R.sub.5 are each independently selected from the group consisting of hydrogen, an alkyl group of 1 to 20 carbon atoms and an aryl group;
- iii) R.sub.3 is either alkyl or aryl;
- and
- iv) n is an integer greater or equal to one;
- and,
- b) one or more polyisocyanates.
Dependencies are inferred from the claim text.