Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1983-12-12
1984-10-23
Kight, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
528110, 5281113, 523414, 524901, C09D 352, C09D 358, C09D 540
Patent
active
044789858
ABSTRACT:
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 intermediate prepared by reacting at a temperature in the range 120.degree. to 180.degree. 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.degree. C. with a carboxylic acid anhydride in an amount to produce a half-ester having an acid value in the range 15 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.
REFERENCES:
patent: 4331574 (1982-05-01), Bekooij et al.
Bekooij Jurrianus
Kooijmans Petrus G.
Raudenbusch Werner T.
Scholten Henricus P. H.
Stachowiak Stephen A.
Faringer Norris E.
Kight John
Moore M. L.
Shell Oil Company
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