Soluble polyesterimide resins
AssigneeGeneral Electric Company
InventorsDonald A. Bolon, Martin A. Byrne
Life of this patent
Estimating the term…
Abstract
Interaction of ethylene glycol with a preformed polyesterimide resin at elevated temperatures forms mixtures homogeneous and clear at room temperature and also soluble in non-polluting solvents, such as monoethers of glycols.
Claims15
A process for preparing a polyesterimide resin which is soluble in non-polluting solvents, such as monoalkyl ethers of a glycol which process comprises:
- (a) adding ethylene glycol to a preformed polyesterimide formed by reacting under esterimide resin forming conditions a reaction mixture comprising:
- (I) an imide-group-contributing component selected from the class consisting of
- (A) both (1) a diamine component and (2) an anhydride component including at least one (a) aromatic carboxylic acid anhydride containing at least one additional carboxylic group, said additional group being esterifiable and substantially non-imidizable, or (b) the corresponding acid thereof containing two imide-forming vicinal carboxylic groups in lieu of the anhydride group,
- (B) the carboxy functional polyimide reaction product of said diamine component and said anhydride component, and
- (C) mixtures of (A) above and (B) above;
- (II) an ester-group-contributing component comprising
- (D) at least one dihydric alcohol containing two esterifiable hydroxyl groups,
- (E) at least one polyhydric alcohol containingat least three esterifiable hydroxyl groups,
- (F) at least one lower dialkyl ester of a phthalic acid component selected from the group consisting of terephthalic acid, isophthalic acid, and mixtures of said acids;
- and (b) heating the mixture of ingredients in (a) at an elevated temperature and for a period of time sufficient to incorporate the ethylene glycol into the polyesterimide resin by transesterification, so that upon cooling to room temperature, a clear, homogeneous resinous composition is obtained which is soluble in the aforesaid monoether of a glycol.
A resinous composition comprising a preformed polyesterimide resin interacted with 2 to 10%, by weight, thereof ethylene glycol at elevated temperatures, said composition being homogeneous and clear at room temperature, and soluble at room temperature in a monoalkyl ether of a glycol.
A resinous composition comprising a preformed polyesterimide resin interacted with 2 to 10%, by weight, thereof ethylene glycol at elevated temperatures, said composition being homogeneous and clear at room temperature and soluble at room temperature in a monoalkyl ether of a glycol, wherein the preformed polyesterimide is the product of reaction of a mixture of ingredients comprising
- (I) an imide-group-contributing component selected from the class consisting of
- (A) both (1) a diamine component and (2) an anhydride component including at least one (a) aromatic carboxylic acid anhydride containing at least one additional carboxylic group, said additional group being esterifiable and substantially non-imidizable, or (b) the corresponding acid thereof containing two imide-forming vicinal carboxylic groups in lieu of the anhydride group,
- (B) the carboxy functional polyimide reaction product of said diamine component and said anhydride component, and
- (C) mixtures of (A) above and (B) above;
- (II) an ester-group-contributing component comprising
- (D) at least one dihydric alcohol containing two esterifiable hydroxyl groups,
- (E) at least one polyhydric alcohol containing at least three esterifiable hydroxyl groups,
- (F) at least one lower dialkyl ester of a phthalic acid component selected from the group consisting of terephthalic acid, isophthalic acid, and mixtures of said acids.
Dependencies are inferred from the claim text.