Claims
- 1. A substrate structure coated with at least one layer of the polyimide composition comprising recurring units ##STR6## wherein Ar is at least one tetravalent aromatic nucleus; R is a divalent hydrocarbon radical; R.sub.1 is a monovalent hydrocarbon radical; m and n are each at least one; and x is 1 to about 50.
- 2. A multilayer structure comprising at least one substrate coated with one or more layers of the polyimide composition of claim 1.
- 3. A substrate coated with at least one layer of the polyamic acid composition comprising recurring units ##STR7## wherein Ar is at least one tetravalent aromatic nucleus; R is a divalent hydrocarbon radical; R.sub.1 is a monovalent hydrocarbon radical; r and s are at least one; y is 1 to about 50; R.sub.2 and R.sub.3 are independently selected from halogen, --OH, and --OR.sub.4; and R.sub.4 is an alkyl group of 1 to 4 carbon atoms.
- 4. A multilayer structure comprising at least one substrate coated with one or more layers of the polyamic acid composition of claim 3.
Parent Case Info
This is a division of Ser. No. 491,436, filed 3-9-90.
US Referenced Citations (4)
Divisions (1)
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Number |
Date |
Country |
Parent |
491436 |
Mar 1990 |
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