Imino acids and resins derived therefrom
AssigneeThe P. D. George Company
InventorDaniel J. Lange
Life of this patent
Estimating the term…
Abstract
This invention relates to imino dicarboxylic acids (IDA) of the general formulae ##STR1## and ##STR2## where IS A MOIETY, PREFERABLY AROMATIC, R is a moiety, preferably aliphatic, and to resins derived from such acids. Such resins, which may vary widely, are illustrated by polyesters, poly(ester-amides), poly (ester-imides), poly(ester-imide-amides), etc. In the preferred embodiment such resins contain tris (hydroxyethyl) isocyanurate. The preferred IDA, which is derived from trimellitic anhydride (TMA) and glycine, has the following idealized formula ##STR3## and IS THE PREDOMINANT DICARBOXYLIC ACID EMPLOYED IN SUCH RESINS.
Claims15
A resin which is a polyester of
- A. a dicarboxylic acid component which is a preformed iminodicarboxylic acid of the formula ##STR37## or ##STR38## where Z and Z' are aromatic moieties, the indicated ##STR39## group attached to Z being attached to an aromatic ring of Z, the ##STR40## groups linking an N to Z or Z' each being attached to an aromatic ring in Z or Z' and being present in a 5 membered imide ring and the moiety R being divalent aliphatic, the N and COOH moieties attached to R being attached to carbons of R, and of a polyhydric alcohol component which is at least one of
- B. a glycol component, and
- C. a polyol component containing at least three esterifiable hydroxyl groups, and any further components of said resin being
- D. the imide or imide-amide of
- D.sub.1. an aromatic diamine and
- D.sub.2. an aromatic tricarboxylic or aromatic tetracarboxylic acid, of the formulae, respectively, ##STR41## , and ##STR42## two of the COOH groups of the acid (a) and each of the COOH groups of each of the two pairs of such groups of the acid (b) being attached to adjacent carbons of a benzene ring of the Z" and Z'" moieties, respectively, Z" and Z'" being aromatic moieties,
- where (A) and at least one of (B) and (C) and (D) are the sole polymer forming components of said resin and only the components (A) and at least one of (B) and (C) are required to be present as polymer forming components.
Dependencies are inferred from the claim text.