Process for the preparation of boron-containing...

Details Process for the preparation of boron-containing... Process for the preparation of boron-containing...

C - Chemistry, Metallurgy

08

G

402/7.2

C08G 8/32 (2006.01) C08G 8/28 (2006.01) C08L 21/00 (2006.01)

Patent

CA 1123144

PROCESS FOR THE PREPARATION OF BORON- CONTAINING PHENOL/FORMALDEHYDE RESIMS Abstract of the Disclosure The invention relates to a process for the preparation of boron-containing phenol/formaldehyde resins be react- ing diphenylol alkane novolaks with unsaturated fatty acids or fatty acid esters and boron compounrs, characteris- ed 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 tri- alkyl 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)2 B-O-B - (OR)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 C1-C4 alcohol. Le A 18 700

320886

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