Claims
- 1. A method of using a resin for breaking oil-water emulsions, where the resin is obtained from a compound of the formula 1in whichX is —NHR1, —COOH or —CONHR2, in which R1 is H, C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl, C7-C30-alkylaryl or —COR2 R2 is H, C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl or C7-C30-alkylaryl, Y is in the ortho, mets or pars position relative to X, and is a radical of the formulae 2 to 5in whichR3 is C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl, C7-C30-alkyaryl R4 is —OR3, —NR6R7 or —R5 R5 is C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl or C7-C30-alkylaryl R6 has the same meaning as given for R3, or is —COR3, but is independent of R3, R7 has the same meaning as given for R3, or is —COR3, but is independent of R3, where, by performing the steps A) or B) with formula 1 and the resin is obtained from performing steps A) and B), which can be carried out in any order, of A) reaction with an aldehyde of the formula 6 R8—CHO (6), where R8 is H, C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl or C7-C30-alkylaryl, and B) alkoxylation with a C2-C4-alkylene oxide in molar excess, such that a resulting alkoxylate has a degree of alkoxylation of from 1 to 100 alkylene oxide units per —OH or —NH group, and the resin has a molecular mass of from 250 to 100,000 units; the method comprising adding the resin to an oil-water emulsion.
- 2. A resin obtained from a compound of formula 1in whichX is —NHR1, in which R1 is H, C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl, C7-C30-alkylaryl Y is in the ortho, meta or para position relative to X, and is a radical of formula 2 —O—R3 (2) in whichR3 is C1-C30-alkyl, C2-C30-alkylaryl, C6-C18-aryl, C7-C30-alkylary where, by performing the steps A) or B) with formula 1 end the resin is obtained from performing steps A) and B), which can be carried out in any order, of A) reaction with an aldehyde of the formula 6 R8—CHO (6), where R8 is H, C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl or C7-C30-alkylaryl, and B) alkoxylation with a C2-C4-alkylene oxide in molar excess, such that a resulting alkoxylate has a degree of alkoxylation of from 1 to 100 alkylene oxide units per —OH or —NH group, and the resin has a molecular mass of from 250 to 100,000 units.
- 3. The resin as claimed in claim 2, which has been condensed using formaldehyde.
- 4. The resin as claimed in claim 2, which, on average, has been ethoxylated with from 2 to 50 ethoxy units per free NH group.
Priority Claims (1)
Number |
Date |
Country |
Kind |
19916946 |
Apr 1999 |
GB |
|
Parent Case Info
This divisional of application Ser. No. 09/549,015, filed Apr. 14, 2000, now U.S. Pat. No. 6,465,525.
US Referenced Citations (17)
Foreign Referenced Citations (3)
Number |
Date |
Country |
24 45 873 |
Apr 1976 |
DE |
1 060 140 |
Aug 1977 |
DE |
0 078 975 |
Aug 1983 |
EP |