Water-Based Polyolefin Corrosion Inhibitors Based on Vinyl/Vinylidene Terminated Polyolefins

Patent metadata

Field	Value
Publication number	US-2016160071-A1
Application number	US-201514923060-A
Country	US
Kind code	A1
Filing date	Oct 26, 2015
Priority date	Dec 4, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

A corrosion inhibitor composition useful in pipes, pilings and hulls comprising the reaction product of a vinyl/vinylidene-terminated polyolefin having at least 14 carbon atoms and a polyamine having a molecular weight of at least 500 g/mole.

First claim

1 . A corrosion inhibitor composition comprising the reaction product of a vinyl/vinylidene-terminated polyolefin having a carbon number of at least 14 and a polyamine having a molecular weight of at least 500 g/mole.

2 . The corrosion inhibitor composition of claim 1 , wherein the vinyl/vinylidene-terminated polyolefin is first functionalized before reacting with the polyamine.

3 . The corrosion inhibitor composition of claim 2 , wherein the functionalization converts the vinyl/vinylidene-terminus into an aldehyde, a glycol, and/or a siloxane.

4 . The corrosion inhibitor composition of claim 1 , wherein the number average molecular weight (Mn) of the polyamine is within a range from 500 g/mole to 3000 g/mole.

5 . The corrosion inhibitor composition of claim 1 , wherein the number average molecular weight (Mn) of the vinyl/vinylidene-terminated polyolefin is within a range from 200 g/mole to 10,000 g/mole.

6 . The corrosion inhibitor composition of claim 1 , wherein the vinyl/vinylidene-terminated polyolefin is a vinyl/vinylidene-terminated atactic polypropylene or polyethylene, or mixture thereof.

7 . The corrosion inhibitor composition of claim 1 , wherein the polyamine comprises glycol subgroups in the backbone and/or side chains.

8 . The corrosion inhibitor composition of claim 7 , wherein the polyamine has the following general structure:

wherein the values of x, y and z can be, independently within a range of from 2 to 60, and wherein each R is, independently, selected from hydrogen and C1 to C10 alkyls, or C6 to C20 aryls or alkylaryls.

9 . The corrosion inhibitor composition of claim 1 , having a carbon number of greater than 25 carbons.

10 . The corrosion inhibitor composition of claim 1 , wherein the reaction product is a 1:1 molar ratio of a polyolefin block and a polyamine block, the polyolefin block having a number average molecular weight (Mn) within the range from 200 g/mole to 1000 g/mole.

11 . The corrosion inhibitor composition of claim 1 , formed by the process of:
a) reacting the vinyl/vinylidene-terminated polyolefin with a siloxane to form a siloxane functionalized vinyl/vinylidene-terminated polyolefin; b) reacting the siloxane functionalized vinyl/vinylidene-terminated polyolefin with a allyl-glycol to form a glycol-siloxane vinyl/vinylidene-terminated polyolefin; and c) reacting the glycol-siloxane vinyl/vinylidene-terminated polyolefin with the polyamine to form the corrosion inhibitor composition.

12 . The corrosion inhibitor composition of claim 1 , formed by the process of:
a) reacting the vinyl/vinylidene-terminated polyolefin with a hydroformylation agent to form an aldehyde-terminated polyolefin; and b) reacting the aldehyde-terminated polyolefin with a reducing agent and the polyamine to form the corrosion inhibitor composition.

13 . The corrosion inhibitor composition of claim 1 , wherein the polyamine the PA is a polyalkylimine represented by the following general formula: (—NHCH 2 CH 2 —) m [—N(CH 2 CH 2 NH 2 )CH 2 CH 2 —], wherein m is from 10 to 20,000, and n is from 20 to 2,000.

14 . The corrosion inhibitor composition of claim 1 , wherein the polyamine is a polyalkylimine having the following general structure:

wherein n has a value within the range from 2 to 60; and wherein the branching depicted in the structure can vary such that the value of a, b, and c can independently be within a range of from 0 to 10.

15 . A pipe coated at least on its interior with the corrosion inhibitor composition of claim 1 .

16 . The pipe of claim 15 , wherein the pipe exhibits a weight loss due to corrosion by acidic solution and carbon dioxide of less than 3.5 wt % a week.

Assignees

• Exxonmobil Chem Patents Inc

Inventors

• Luo Shuji
• Tsou Andy H
• Walker Elizabeth L
• Dierolf Marcia E
• Rodriguez George

Classifications

• C08L83/08

  containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen · CPC title

• B60C1/0016

  Compositions of the tread · CPC title

• C08G81/021

  Block or graft polymers containing only sequences of polymers of C08C or C08F · CPC title

• C08G77/26

  nitrogen-containing groups · CPC title

• C08G77/48

  in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms (C08G77/42 takes precedence) · CPC title