摘要:
Water soluble polyester-imide prepolymers are prepared (1) having 5 to 60%, preferably at least 35%, of imide moieties, (2) an excess hydroxyl content in excess of 60% and preferably more than 100%, and (3) a number average molecular weight of 600-1300. To water solubilize the prepolymers formed, there are added amines, preferably tertiary amines. The products are useful as wire enamels. To enhance the thermoplastic flow of the enamel, there are added organic titanates.
摘要:
Water dispersible oil-modified polyesters and oil-free polyesters are formed by the reaction of aromatic dicarboxylic acids, aliphatic dicarboxylic acids and polyols to form the polyester. In oil-free polyesters, oils of the respective fatty acids are excluded but the other reactants are similar to those employed in the preparation of oil-modified polyesters.
摘要:
Polyester-imide resins are prepared which are soluble in non-phenolic solvents by incorporating a monoether of a diethylene glycol or triethylene glycol into the resin.
摘要:
An acrylonitrile-butadiene-styrene terpolymer is added to a phenol formaldehyde novolak to produce a mixture which materially increases the resistance to peelback as compared to the phenol formaldehyde novolak alone when used as a shell process foundry resin.
摘要:
A composition is prepared which is useful in wire enamel, comprising (1) a water soluble polyester which is a condensation product of (a) a tribasic carboxylic acid, (b) an aliphatic or aromatic dicarboxylic acid and (c) a dihydric alcohol, (2) hydroxylmethylated diacetone acrylamide as a crosslinking agent and a water soluble organic titanate.This application is a division of application Ser. No. 536,963, filed Dec. 27, 1974, now U.S. Pat. No. 3,974,115, which in turn is a continuation-in-part of application Ser. No. 311,701 filed Dec. 7, 1972.
摘要:
A hydrolytically stable heat curable composition useful as a hermetic varnish for electrical conductors is provided. It consists essentially of an aqueous solution of (1) an epoxy adduct which is the reaction product of(A) a glycidyl ether of a dihydric phenol,(B) aminobenzoic acid,(C) a water soluble organic solvent boiling about 150.degree. C., and(D) a water soluble amine,and (2) a water soluble phenolic cross-linking agent.
摘要:
Self-bondable polyamides are prepared by reacting an aromatic diisocyanate or diamine with a mixture of terephthalic acid and an aliphatic dibasic acid having at least 6 carbon atoms. These self-bondable amides can also be used as topcoats for wires having basecoats of another polymer, e.g. a polyester, polyester-imide, or polyamideimide.
摘要:
A tackifier system which includes the reaction product of oxirane bearing materials with alkyl phenol novolacs for elastomers of alpha-olefin polymers which are sulfur curable.
摘要:
A solderable polyurethane wire enamel composition comprising a mixture of a blocked isocyanate and polyesterimide resin wherein the ratio of isocyanate groups in the blocked isocyanate to hydroxyl groups in the polyesterimide resin is about 0.82:1 to about 5.7:1 and the hydroxyl to carboxylic acid ratio of the raw materials used in preparing the polyesterimide is about 1.4:1 to about 2.5:1.
摘要:
Self-bondable polyamides are prepared by reacting an aromatic diisocyanate or diamine with a mixture of terephthalic acid and an aliphatic dibasic acid having at least 6 carbon atoms. These self-bondable amides can also be used as topcoats for wires having basecoats of another polymer, e.g. a polyester, polyester-imide, or polyamide-imide.