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:
Jan. 05, 1993
Filed:
Mar. 21, 1990
Hans Graff, deceased, late of Schlangenbad, DE;
Robert Graff, heir, Bensheimf, DE;
Adam Has, Mainz-Kastel, DE;
Wolfgang Hesse, Taunusstein, DE;
Hoechst AG, , DE;
Abstract
The invention relates to a binder (A) which contains hydroxyl groups and carboxyl groups, the latter optionally in neutralized form, wherein the binder (A) is essentially composed of a mixture of polyalkylidenepolyphenols (B) having average degrees of condensation of 2.3 to 8.0 and average molecular weights M.sub.n of 250 to 1,000, these polyalkylidenepolyphenols (B) containing phenolic OH groups and carboxyl groups, and polyaddition products (C) containing structural units (d) which are derived from epoxide compounds (D) which on average contain at least two (1,2-)epoxide groups per molecule, the structural units (d) having an average molecular weight M.sub.n of 600 to 10,000, and containing structural units (b) which are derived from the polyalkylidenephenols (B), and these polyaddition products (C) have average molecular weights M.sub.n of at least 1,100. Coating preparations which contain this binder (A) are suitable in particular for the internal coating of containers for the food industry, this coating having, in particular, very low release of harmful substances and good resistance to sterilization temperatures.