Corrosion inhibitor for cellulosic insulation
AssigneeThe Sherwin-Williams Company
InventorAnthony P. Wagener
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Abstract
This invention relates to a process for limiting the corrosive nature of cellulosic insulation which has been treated with a fire-retardant composition, by applying to the insulation an effective amount of an aqueous corrosion inhibiting solution. The corrosion inhibiting solution comprises an amine or alkali metal salt of an aromatic triazole, and an amine or alkali metal salt of an organic phosphate ester acid.
Claims11
A process for limiting the corrosive nature of cellulosic insulation which has been treated with a fire-retardant composition, by applying to the insulation an effective amount of an aqueous corrosion inhibiting solution which comprises:
- (a) about 1.0 to about 99 parts water;
- (b) about 0.01 to about 10 parts of at least one amine or alkali metal salt of an aromatic triazole;
- (c) about 1 to about 99 parts of at least one amine or alkali metal salt of an organic phosphate ester acid;
- wherein the acid is selected from the group of acids having the formulas:
- ##STR3## wherein R is alkyl from 1 to about 20 carbons or alkylaryl from 7 to about 30 carbons, or aryl;
- n is an integer from 1 to 50, x is an integer from 1 to 50 and y is an integer from 1 to 50.
An insulating material having fire-retardant and corrosion inhibiting characteristics wherein said material comprises:
- (a) about 50 to 100 parts cellulose insulation;
- (b) about 5 to 40 parts fire-retardant selected from the group consisting of borax, boric acid, aluminum salts and ammonium salts;
- (c) about 0.1 to about 5 parts of a corrosion inhibitor, wherein said corrosion inhibitor comprises (i) about 0.01 to about 10 parts of at least one amine or alkali metal salt of a triazole;
- and (ii) about 1 to about 99 parts of at least one amine or alkali metal salt of an organic phosphate ester acid;
- wherein the acid is selected from the group of acids having the formulas:
- ##STR4## wherein R is alkyl from 1 to about 20 carbons or alkylaryl from 7 to about 30 carbons, or aryl;
- n is an integer from 1 to 50, x is an integer from 1 to 50 and y is an integer from 1 to 50.
Dependencies are inferred from the claim text.