Arylalkyl silicone sulfonate-silicate copolymers
AssigneeBASF Wyandotte Corporation
InventorsPauls Davis, Joe C. Wilson
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Abstract
Novel arylalkyl silicone sulfonate-silicate copolymers are disclosed which are useful in inhibiting the corrosion of metals below sodium in the electromotive series that come in contact with aqueous liquids, especially aqueous alcohol solutions used as heat transfer media. Antifreeze concentrates and a process for inhibiting corrosion are also disclosed.
Claims13
A copolymer consisting essentially of from 0.1 to 99.9 parts by weight of at least one
- group member selected from the group consisting of at least one silicone sulfonate group member derived from silicone sulfonates having the formula:
- ##EQU3## wherein Z is selected from the group consisting of at least one of an hydrogen atom, an alkyl group, an aryl group and a group having any of the formulas:
- ##EQU4## wherein each of the groups represented by the above formulas are monovalent groups connected to R through a carbon to carbon linkage, R is a divalent or trivalent aryl group containing up to and including 10 carbon atoms, R' is an alkyl group, a is an integer of from 2 to 4, n is an integer of from 0 to 2, and M is a monovalent, divalent, or trivalent cation;
- and
- from 0.1 to 99.9 parts by weight of at least one silicate group member represented by the formula:
- ##EQU5## wherein X is a cation that forms a water-soluble silicate;
- d is the valence of the cation represented by X and has a value of at least one;
- and e has a value from 1 to 3 inclusive;
- said parts by weight of said groups in said copolymer being based upon 100 parts by weight of said copolymer.
An improved inhibited aqueous alcohol composition comprising water, an alcohol, and a corrosion inhibiting amount of a copolymer consisting essentially of from 0.1 to 99.9 parts by weight of at least one group member selected from the group consisting of at least one silicone sulfonate group member derived from silicone sulfonates having the formula:
- ##EQU6## wherein Z is selected from the group consisting of at least one of a hydrogen atom, an alkyl group, an aryl group and a group having any of the formulas:
- ##EQU7## wherein each of the groups represented by the above formulas are monovalent groups connected to R through a carbon-to-carbon linkage, R is a divalent or trivalent aryl group containing up to and including 10 carbon atoms, R' is an alkyl group, a is an integer of from 2 to 4, n is an integer of from 0 to 2, and M is a monovalent, divalent, or trivalent cation;
- and
- from 0.1 to 99.9 parts by weight of at least one silicate group member represented by the formula:
- ##EQU8## wherein X is a cation that forms a water-soluble silicate;
- d is the valence of the cation represented by X and has a value of at least one;
- and e has a value from 1 to 3 inclusive;
- said parts by weight of said groups in said copolymer being based upon 100 parts by weight of said copolymer.
Dependencies are inferred from the claim text.