Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Maintaining environment nondestructive to metal
Patent
1979-09-24
1980-12-23
Richman, Barry S.
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Maintaining environment nondestructive to metal
252 73, 252 75, 252 76, 252 77, 252 781, 252 783, 252389R, 252396, 422 7, 422 17, C09K 1532, C23F 1106, C23F 1110
Patent
active
042410118
ABSTRACT:
This invention relates to single-phase antifreeze and coolant concentrates comprising an alcohol, a metal salt of a carboxysiloxane and an organic basic pH buffer and corrosion inhibitor comprising a hydroxybenzoic acid or mixtures thereof. The concentrates are preferably used as coolants either undiluted or upon dilution with about 25 to about 90 percent by weight of water based upon the total weight of the concentrate. The alcohol is preferably ethylene glycol. The coolant compositions are effective in providing protection against corrosion of all metals and alloys used in industrial heat exchangers and are especially effective in inhibiting the corrosion of aluminum internal combustion engine and radiator components.
REFERENCES:
patent: 2094564 (1937-09-01), Schenck et al.
patent: 2411676 (1946-11-01), Borghart
patent: 3203969 (1965-08-01), Pines et al.
patent: 3234144 (1966-02-01), Morehouse
Hirozawa Stanley T.
O'Brien Edward F.
Wilson Joe C.
BASF Wyandotte Corporation
Pierce Andrew E.
Richman Barry S.
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