Boron-containing, quaternary ammonium salt-containing resin compositions
AssigneePPG Industries, Inc.
InventorsJoseph F. Bosso, Marco Wismer
Life of this patent
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Abstract
Synthetic resins which are water-dispersible resins, containing boron and chemically-bound quaternary ammonium base salts, can be dissolved or dispersed in water to provide aqueous coating compositions. The resins are derived from epoxy group containing organic materials and are essentially epoxy group free. When dispersed or dissolved in water, the boron-containing, quaternary ammonium salt-containing resins can be applied to a wide variety of different substrates by electrodeposition, and will deposit on the cathode to provide coatings of unique properties.
Claims20
An ungelled, water-dispersible composition suitable for use in electrodeposition comprising:
- A. an essentially epoxy group-free, quaternary ammonium salt-containing resin comprising the reaction product of:
- 1. an organic epoxide having a 1,2-epoxide equivalent of at least about 1, and
- 2. an amine acid salt,
- i. said amine acid salt reacted with said organic epoxide at a temperature of at least room temperature, said temperature being sufficient to form quaternary ammonium salt groups,
- ii. said amine acid salt reacted with said epoxide in an amount sufficient to form quaternary ammonium salt groups and an essentially epoxy group-free composition, this being accomplished by reacting at least a stoichiometric amount of the amine salt with the organic epoxide, or by post reacting the organic epoxide-amine salt reaction product to remove residual epoxy groups;
- and
- B. boron in the form of boric acid, a boron ester, or other compound of boron which forms boric acid in aqueous medium;
- said boron being present in an amount sufficient to harden an electrodeposited film.
An aqueous dispersion suitable for use in electrodeposition comprising:
- A. an essentially epoxy group-free, quaternary ammonium salt-containing resin comprising the ungelled reaction product of:
- 1. an organic epoxide having a 1,2-epoxide equivalent of at least about 1, and
- 2. an amine acid salt,
- i. said amine acid salt reacted with the organic epoxide at at least room temperature, said temperature being sufficient to form quaternary ammonium salt groups,
- ii. said amine acid salt reacted with said organic epoxide in an amount sufficient to form quaternary ammonium salt groups and an essentially epoxy group-free composition, this being accomplished by reacting at least a stoichiometric amount of amine salt with the organic epoxide, or by post reacting the organic epoxide-amine salt reaction product to remove residual epoxy groups;
- and
- B. boric acid.
Dependencies are inferred from the claim text.