C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/34
C09K 15/04 (2006.01) C09K 5/00 (2006.01) C09K 5/20 (2006.01) C23F 11/12 (2006.01)
Patent
CA 1055244
CORROSION INHIBITED ANTIFREEZE COMPOSITION AND PROCESS FOR INHIBITING THE CORROSION OF SOLDER ALLOYS The Abstract of the Disclosure A novel antifreeze composition is provided which comprises a water soluble liquid alcohol freezing point depressant and an inhibitor. The freezing point depressant is preferably at least one water soluble alcohol containing from 1 to 4 carbon atoms inclusive and from 1 to 4 hydroxy groups inclusive such as ethylene glycol. The inhibitor comprises at least one substance selected from the group consisting of (a) compounds corresponding to the following structural formula: Image wherein R1 is an alkylene radical containing from zero to 12 carbon atoms inclusive, R2 is an alkyl radical containing from 1 to 10 carbon atoms inclusive and R3 is an alkylene radical containing from 1 to 12 carbon atoms inclusive, and (b) the mono- and di-metal salts, the mono- and di-ammonium salts, and the mono-and di-amides of compounds corresponding to the above structural formula. The presently preferred inhibitor comprises 1-carboxy-2- hexyl-5-(7-carboxyheptyl)-cyclohex-3-ene, or the mono- and di-metal salts, ammonium salts, and amides thereof. The inhibitor also aids in solublizing antifoam agents. The invention further provides a process for inhibiting the corrosion of solder alloys which employs the novel antifreeze composition of the invention.
237384
Compton John W.
Dutton Daniel R.
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