Patent EP0210642A2 successfully refreshed from Google Patents.
EP0210642A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surfactants derived from succinic acid
Assignee: Raffineria Olii Lubrificanti "rol" SpA
•
Filing: 1986-07-29
•
Granted: —
•
Expires: 2006-07-29
Abstract
Abstract Surfactants derived from succinic acid having the general formula: R-An-OOC-CH2-CH2-COOR<1> (I) wherein: R<1> is H, a metal ion, -NH4, a cation of an organic amine base or a group having the formula: -An-R (II) wherein A is an oxyethylene group -CH2-CH2O-, n is a number from 1 to 20 and R is a C8-C20 alkyl group.
Inventors
- 👤 Luigi Turchini
- 👤 Salvatore Garlisi
- 👤 Aurelio Albanini
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:13
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/04; C11D1/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
Esters of succinic acid, having the general formula: R-A n -OOC-CH₂-CH₂-COOR¹ (I) wherein: R¹ is a hydrogen atom, a metal ion, an ammonium group, the cation of an organic amine base or a group having the formula: -A n -R (II) wherein A is an oxyethylene group -CH₂-CH₂-O-, n is a number from 1 to 20 and R is a C₈-C₂₀ alkyl group.
Claim 2
Dependent Claim
63 words
Esters of succinic acid, having the general formula: R-A n -OOC-CH₂-CH₂-COOR¹ (I) wherein: R¹ is a hydrogen atom, a metal ion, an ammonium group, the cation of an organic amine base or a group having the formula: -A n -R (II) wherein A is an oxyethylene group -CH₂-CH₂-O-, n is a number from 1 to 20 and R is a C₈-C₂₀ alkyl group.
Claim 3
Dependent Claim
33 words
Esters according to claim 1, wherein, in the -A n -R group (II), n is a number from 4 to 10 and R is an alkyl group containing 10 to 16 carbon atoms.
Claim 4
Dependent Claim
18 words
Esters according to claim 1, wherein R¹ is a metal ion, an ammonium group or an amine cation.
Claim 5
Dependent Claim
11 words
Esters according to claim 1, wherein R¹ is -A n -R.
Claim 6
Dependent Claim
76 words
A process for the preparation of esters having the formula (I) according to claim 1, which comprises esterifying succinic acid with an aliphatic polyoxyethylated alcohol having the formula: R-A n -OH (III) wherein R, A and n have the meaning given in claim 1, at temperatures of from 150 to 190°C, under continuous removal of the reaction water and, optionally, converting the product obtained into a salt with a metal base or ammonium or an amine.
Claim 7
Dependent Claim
27 words
A process according to claim 5, wherein the base is selected from sodium, potassium, magnesium or ammonium hydroxide, sodium or potassium carbonate or bicarbonate, triethanolamine or monoethanolamine.
Claim 8
Dependent Claim
25 words
Cosmetic and detergent compositions containing one or more esters of succinic acid having the formula (I) according to any one of claims 1 to 4.
Claim 9
Dependent Claim
18 words
Use of the esters of formula I according to any one of claims 1 to 4 as surfactants.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.