Ciba-geigy Corporation

John A Gannon

Joseph Stephen Puglisi

Vincent Brytus

Robert C Nelson

Kwan Ting Shen

Marianne Di Benedetto

Kenneth L Payne

John P Seymour

Coating compositions containing a polyfunctional glycidyl ether of sorbitol cured at ambient temperature with polyamidoamine hardeners exhibit unexpectedly high resistance to loss of gloss when exposed to weathering conditions. The cured product also have good mechanical and chemical properties.

Method of coating with polyglycidyl ether of sorbitol and polyamidoamine

Advanced epoxy resins prepared by the reaction of diglycidyl ethers of di-secondary alcohols and dihydric phenols, said advanced resins being heat curable with suitable curing agents to afford cured coating compositions exhibiting a variety of excellent physical properties and performance characteristics.

Advanced resins from diglycidyl ethers of di-secondary alcohols and

A polyglycidyl derivative of an aromatic diamine, aminophenol, or polyphenol and a diglycidyl ether of a bisphenol are reacted with a bisphenol, in the presence of a catalyst at elevated temperature, to yield a reaction product wherein each glycidyl group is effectively endcapped with a moiety containing a free hydroxyl group. The ratio of equivalents of polyglycidyl compound to diglycidyl compound is 1 to 4 to 1 to 1, and of bisphenol to total glycidyl compounds is 1.8 to 1 to 2.4 to 1. Said product is useful for curing solid epoxy resins. The epoxy resins cured by said product have a dense crosslinked network resulting in concomitant superior coating properties especially chemical resistance while maintaining good flexibility.

Hydroxyl terminated polyfunctional epoxy curing agents

Advancement catalysts selected from the group consisting of formylmethylenetriphenylphosphorane and its phosphonium halide salt precursors, e.g., formylmethyltriphenylphosphonium chloride, confer high reactivity and selectivity on epoxy resin advancement reactions. Advanced epoxy resins are useful in the perparation of coatings of high quality.

Advancement catalysts for epoxy resins

A liquid adduct is prepared from the reaction of an amine, a polyepoxide compound with a functionality greater than 2, and, optionally, a diglycidyl ether of bisphenol A and/or the hydrogenated equivalent thereof, an accelerator or a suitable solvent; said reaction continuing until no active epoxy groups are available. The adducts are useful as curing agents for epoxy resins in both room temperature and heat cured applications to produce protective coatings of superior properties.

Adducts from amines and di- and polyepoxides

An improved process for preparing with the aid of organic cosolvents water-dilutable, heat-curing coating compositions comprises (a) reacting an aromatic polyglycidyl ether with a polyethylene glycol in the presence of 10 to 30% of a polyhydric phenol, (b) adding an aminoplast curing agent, and (c) diluting with water to give a stable aqueous or aqueous organic composition. The process gives compositions which are useful in preparing coatings for a wide variety of substrates.

Process for preparing water-dilutable, heat-curing epoxy resin coating

A process for preparing water-dilutable, heat-curing coating compositions comprises (a) reacting an aromatic polyglycidyl ether with a polyethylene glycol in the presence of 0 to 20% of a polyhydric phenol, (b) adding an aminoplast curing agent, and (c) diluting with water to give a stable aqueous composition. The process gives compositions which are useful in preparing coatings for a wide variety of substrates obviating the need for organic solvents with their inherent costs and environmental hazards.

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Danbury, CT, United States of America

John A Gannon