The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1993
Filed:
Jun. 03, 1992
Stuart P Darwen, Manchester, GB;
Daniel A Cornforth, Rochdale, GB;
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
This invention relates to a water compatible polyamine-epoxy adduct formed by the reaction of a polyamine with a mixture of a monoepoxide and polyepoxides, the monoepoxide being added in an amount to react with about 10 to 50% of the primary amino groups in said polyamine and the polyepoxides being added in an amount to react with from about 35 to 65% of the remaining primary amino groups. This invention also contemplates a water dispersible blend resin as an amine salt and comprises a water compatible polyamine-epoxy adduct and a resin compatible polyamine-epoxy adduct wherein the water compatible polyamine-epoxy adduct is as described above and the resin compatible polyamine-epoxy adduct is formed by reacting a polyamine with an aromatic monoepoxide, said aromatic monoepoxide reacted in an amount to provide from about 0.4 to 1 equivalents epoxide per primary amino group. The invention also pertains to a two component water epoxy coating composition comprising an aqueous dispersion of a blend of a water compatible polyamine-epoxy adduct, a resin compatible-polyamine-epoxy adduct and a polyepoxide resin emulsified therewith wherein the amount of polyepoxide resin in the coating composition is such that there is from about 0.5 to 1.5 equivalents epoxide per active hydrogen equivalent.