Claims
- 1. A composition for inhibiting the corrosion of metals in highly acidic environments comprising the polyamidoamine condensation reaction product of:
- (a) 20-80 wt. % of a mixture containing
- (1) 20-80 wt. % of a copolymer formed by reacting 1-99 wt. % of .alpha.-methyl styrene reacted in a polymerization reaction with 99-1 wt. % of a member selected from the group consisting of acrylic acid, methacrylic acid, and combinations thereof; and
- (2) 80-20 wt. % of a member selected from the group consisting of rosin, C.sub.23 -C.sub.24 modified rosins, C.sub.8 -C.sub.20 fatty acids, C.sub.9 -C.sub.22 modified fatty acids, and combinations thereof; with
- (b) 80-20 wt. % of a polyamine.
- 2. The composition of claim 1 comprising the polyamidoamine condensation reaction product of:
- (a) 30-70 wt. % of a mixture containing
- (1) 20-80 wt. % of a copolymer formed by reacting 20-80 wt. % of .alpha.-methyl styrene reacted in a polymerization reaction with 80-20 wt. % of a member selected from the group consisting of acrylic acid, methacrylic acid, and combinations thereof; and
- (2) 80-20 wt. % of a member selected from the group consisting of rosin, C.sub.23 -C.sub.24 modified rosins, C.sub.8 -C.sub.20 fatty acids, C.sub.9 -C.sub.22 modified fatty acids, and combinations thereof; with
- (b) 70-30 wt. % of a polyamine.
- 3. The composition of claim 1 wherein the fatty acid has a molecular weight in the range of 200-350.
- 4. The composition of claim 1 wherein the modified fatty acid has a molecular weight in the range of 270-470.
- 5. The composition of claim 1 wherein the rosin has a molecular weight in the range of 300-350.
- 6. The composition of claim 1 wherein the modified rosin has a molecular weight in the range of 370-470.
- 7. The composition of claim 1 wherein the copolymer has a molecular weight in the range of 1,000-10,000.
- 8. The composition of claim 1 wherein the polyamine has a molecular weight in the range of 60-1,000.
- 9. The composition of claim 1 wherein the polyamine is selected from the group consisting of aminoethylethanolamine, aminoethylpiperazine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, bis-aminopropylamine, pentamethylenediamine, hydroxyethylpiperazine, bis-hexamethylenetriamine, homologs, and combinations thereof.
- 10. The composition of claim 1 dispersed in a solvent selected from the group consisting of ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, and combinations thereof.
Parent Case Info
This application is a divisional application of my commonly assigned, allowed U.S. patent application Ser. No. 08/499,113 filed Jul. 6, 1995, entitled "Polyamine Condensates of Styrene-Acrylic Acid Copolymers as Corrosion Inhibitors", now U.S. Pat. No. 5,516,826; which is a continuation-in-part of my commonly assigned U.S. patent application Ser. No. 08/403,054 filed Mar. 13, 1995, entitled "Polyamine Condensates of Styrene-Acrylic Acid Copolymers as Corrosion Inhibitors", now abandoned.
US Referenced Citations (22)
Divisions (1)
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499113 |
Jul 1995 |
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Continuation in Parts (1)
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403054 |
Mar 1995 |
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