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. 08, 1980
Filed:
Feb. 02, 1979
Manfred Schmidt, Krefeld, DE;
Dieter Freitag, Krefeld, DE;
Hermann Fries, Bergisch-Gladbach, DE;
Erich Esch, Leverkusen, DE;
Bayer Aktiengesellschaft, , DE;
Abstract
The invention relates to a process for the preparation of boron-containing phenol/formaldehyde resins be reacting diphenylol alkane novolaks with unsaturated fatty acids or fatty acid esters and boron compounds, characterized in that diphenylol alkane novolaks having a molecular weight of from 400 to 1600 are reacted with from 15 to 35 parts by weight of an unsaturated fatty acid or its esters, accompanied by the azeotropic removal of water, and then with from 20 to 100 parts by weight of a boric acid trialkyl ester containing from 1 to 4 carbon atoms per alkyl group or with 14 to 72 parts by weight of a boric acid alkyl ester anhydride of the general formula (RO).sub.2 B--O--B--(OR).sub.2 with 1 to 4 carbon atoms per alkyl group R or with from 10 to 50 parts by weight, preferably from 15 to 20 parts by weight of boron trioxide or with from 18 to 90 parts by weight, preferably from 25 to 36 parts by weight of boric acid in the presence of a C.sub.1 -C.sub.4 alcohol.