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US3888910A
Expired / Lapsed
US
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Surfactive material and its preparation
Assignee: Citrique Belge NV SA
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Filing: 1971-09-14
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Granted: 1975-06-10
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Expires: 1991-09-14
Abstract
Abstract Biodegradeable surface-active material, which when formulated into cleansing, e.g., detergent, compositions provides improved cleansing properties over conventional dispersing or cleansing agents, is obtained by forming esterifying an unsaturated polycarboxylic acid material or the corresponding sulfo-acid material with a mono- or poly-hydroxy containing non-ionic surfactant, and converting the resulting ester(or sulfo-ester), to the corresponding sulfonate salt, e.g. sodium sulforate salt, wherein said unsaturated polycarboxylic acid is the hydrolyzed reaction product of pyrolysing al alkali earth citrate at a temperature between 250*C to 400*C. Any carboxylic acid groups not esterified with the non-ionic surfactant, may be esterified with other esters, or converted into amides, amines or salts. The said acid material may be in the form of a complex ester with a polyhydroxy alcohol.
Inventors
- 👤 Fred Smeets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:14
CPC Classifications
C; C07; C07C; C07C309/00; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/19; C07C57/00; C07C57/02; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/334; C08G65/3344; C08G75/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
140 words
A BIODEGRADABLE SURFACE-ACTIVE COMPOUND PREPARED BY THE PROCESS COMPRISING THE STEPS OF: A. FORMING AN UNSATURATED POLYCARBOXYLIC ACID MATERIAL BY PYROLYZING AN ALKALINE EARTH CITRATE AT A TEMPERATURE BETWEEN 250* TO 400*C. FOR A PERIOD OF TIME UNTIL AN INCREASE IN TITRATABLE ALKALINITY OF THE REACTION MIXTURE IS OBTAINED AND UNTIL NOT MORE THAN 32% BY WEIGHT OF THE ALKALINE EARTH CITRATE REMAINS IN THE REACTION MIXTURE, AND HYDROLYZING THE MATERIAL THUS OBTAINED TO AN ACID, B. FORMING AN ESTER FROM THE SAID ACID MATERIAL BY REACTING AT LEAST ONE CARBOXYLIC ACID GROUP THEREOF WITH A MONOOR POLYHYDROXY-CONTAINING NON-IONIC SURFACTANT SELECTED FROM AT LEAST ONE C1 - C24 MONOHYDRIC OR POLYHYDRIC ALIPHATIC ALCOHOL AND A POLYALKOXYLATED ALKYL PHENOL, AND C. SULPHONATING THE DOUBLE BONDS OF THE UNSATURATED POLYCARBOXYLIC ACID EITHER BEFORE OR AFTER ESTERIFICATION TO FORM SODIUM SULPHONATE GROUPS THEREON.
Claim 2
Dependent Claim
140 words
A BIODEGRADABLE SURFACE-ACTIVE COMPOUND PREPARED BY THE PROCESS COMPRISING THE STEPS OF: A. FORMING AN UNSATURATED POLYCARBOXYLIC ACID MATERIAL BY PYROLYZING AN ALKALINE EARTH CITRATE AT A TEMPERATURE BETWEEN 250* TO 400*C. FOR A PERIOD OF TIME UNTIL AN INCREASE IN TITRATABLE ALKALINITY OF THE REACTION MIXTURE IS OBTAINED AND UNTIL NOT MORE THAN 32% BY WEIGHT OF THE ALKALINE EARTH CITRATE REMAINS IN THE REACTION MIXTURE, AND HYDROLYZING THE MATERIAL THUS OBTAINED TO AN ACID, B. FORMING AN ESTER FROM THE SAID ACID MATERIAL BY REACTING AT LEAST ONE CARBOXYLIC ACID GROUP THEREOF WITH A MONOOR POLYHYDROXY-CONTAINING NON-IONIC SURFACTANT SELECTED FROM AT LEAST ONE C1 - C24 MONOHYDRIC OR POLYHYDRIC ALIPHATIC ALCOHOL AND A POLYALKOXYLATED ALKYL PHENOL, AND C. SULPHONATING THE DOUBLE BONDS OF THE UNSATURATED POLYCARBOXYLIC ACID EITHER BEFORE OR AFTER ESTERIFICATION TO FORM SODIUM SULPHONATE GROUPS THEREON.
Claim 3
Dependent Claim
29 words
A compound as claimed in claim 1 wherein from 25 to 75% of the carboxylic acid groups of the unsaturated polycarboxylic acid are esterified with the said non-ionic surfactant.
Claim 4
Dependent Claim
25 words
A compound as claimed in claim 1, wherein all the carboxylic acid groups of the unsaturated polycarboxylic acid are esterifieD with the said non-ionic surfactant.
Claim 5
Dependent Claim
42 words
A compound as claimed in claim 1 wherein at least one of the carboxylic acid groups of the unsaturated polycarboxylic acid which are not esterified with the said non-ionic surfactant, is esterified with at least one C1 - C24 monohydric aliphatic alcohol.
Claim 6
Dependent Claim
39 words
A compound as claimed in claim 1 wherein at least one of the carboxylic acid groups of the unsaturated polycarboxylic acid which are not esterified with the said non-ionic surfactant, is esterified with at least one polyhydric aliphatic alcohol.
Claim 7
Dependent Claim
19 words
A compound as claimed in claim 5, wherein the said polyhydric alcohol is glycol, glycerol, or a sugar alcohol.
Claim 8
Dependent Claim
42 words
A compound as claimed in claim 1, wherein the said polyalkoxylated alkyl phenol is a polyethoxylated alkyl phenol wherein the alkyl side chain(s) each contain 6 to 14 carbon atoms, and wherein the ethoxy chain contains from 2 to 50 ethoxy groups.
Claim 9
Dependent Claim
18 words
A compound as claimed in claim 1, wherein the said non-ionic surfactant is an alkoxylated aliphatic monohydric alcohol.
Claim 10
Dependent Claim
29 words
A compound as claimed in claim 8, wherein the said alkoxylated aliphatic monohydric alcohol is an ethoxylated C8-C24 alcohol, the ethoxy chain containing from 2 to 50 ethoxy groups.
Claim 11
Dependent Claim
68 words
A product as claimed in claim 1, wherein the said unsaturated polycarboxylic acid is esterified with a polyhydroxy alcohol whereby a complex ester is formed, the said esterification with the said polyhydroxy alcohol being carried out before, during or after the esterification with the said non-ionic surfactants, and before, during or after the conversion of the remaining carboxylic acid group(s) if any to form modified carboxylic acid groups.
Claim 12
Dependent Claim
38 words
The product of claim 1, wherein the said unsaturated polycarboxylic acid of step (1) is sulfonated across the double bonds of the polycarbocylic acid prior to forming the ester of step (1) and step (2) is correspondingly eliminated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |