C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/152, 402/192
C08G 59/42 (2006.01) C08G 59/06 (2006.01) C08G 59/12 (2006.01)
Patent
CA 1205598
A B S T R A C T PROCESS FOR THE PREPARATION OF RESINOUS COMPOUNDS, COMPOUNDS PRODUCED THEREBY AND THEIR USE IN THERMOSETTING COATING COMPOSITIONS Carboxyl-containing resinous compounds, suitable for making water-dilutable thermosetting coating compositions after at least partial neutralization with a base, are prepared by a process wherein a non-acidic hydroxyl-containing resinous inter- mediate prepared by reacting at a temperature in the range 120 to 180°C in the presence of an esterification catalyst in one or more steps a) a diglycidyl ether of a dihydric phenol having an epoxy molar mass not exceeding 1100 with b) a monofunctional phenol, and c) dimerized unsaturated fatty acids in an epoxy phenolic or acidic equivalent ratio of a), b) and c) from x/2/(x-2) to (x + 0.1)/ 2/(x-2), wherein x is at least 4 for a diglycidyl ether having an epoxy molar mass from 400 to 1100 and x is at least 6 for a diglycidyl ether having an epoxy molar mass below 400, is reacted at a temperature not higher than 150°C with a carboxylic acid anhydride in an amount to produce a half-ester having an acid value in the range 5 to 80 mg KOH/g. Such resinous compounds when at least partially neutralized with a base and combined with a cross-linking compound are suitable for use in electrodeposition.
442400
Bekooij Jurrianus
Kooijmans Petrus G.
Raudenbusch Werner T.
Scholten Henricus P.h.
Stachowiak Stephen A.
Shell Canada Limited
Smart & Biggar
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