US4923976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing surface-active glycosides and the use of the glycosides in cosmetic, pharmaceutical and household products
Assignee: PRODUITS CHIMIQUES de la MONTAGNE NOIRE Ste
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Filing: 1982-10-28
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Granted: 1990-05-08
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Expires: 2002-10-28
Abstract
Abstract Surface active glycosides are made by reaction of monose or polyose with an alcohol in the presence of an acid catalyst composition containing acid catalyst and reducing agent; the color properties of the glycosodes so made makes them attractive for use in cosmetic, pharmaceutical and household products. Suitable reducing agents include phosphorous, hypophosphorous, sulphurous, hyposulphurous, nitrous and hyponitrous acids. Suitable catalysts include the known etherification catalysts.
Inventors
- 👤 Germaine Arnaudis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:40
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/662; A; A61; A61K; A61K47/00; A61K47/06; A61K47/26; A61K8/00; A61K8/18; A61K8/30; A61K8/60; A61K8/604; A61Q; A61Q19/00; C07; C07H; C07H15/00; C07H15/02; C07H15/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
A process for the preparation of surface active glycosides having improved color which comprises reacting a C 8 -C 18 fatty alcohol with an aldose or ketose in a mole ratio of from 1.25:1 to 4:1 in the presence of from 0.03 to 10% by weight, based on the weight of the aldose or ketose, of an acid catalyst composition comprising an acid catalyst useful in etherification reactions and an acid reducing agent or salt thereof.
Claim 2
Dependent Claim
76 words
A process for the preparation of surface active glycosides having improved color which comprises reacting a C 8 -C 18 fatty alcohol with an aldose or ketose in a mole ratio of from 1.25:1 to 4:1 in the presence of from 0.03 to 10% by weight, based on the weight of the aldose or ketose, of an acid catalyst composition comprising an acid catalyst useful in etherification reactions and an acid reducing agent or salt thereof.
Claim 3
Dependent Claim
17 words
The process as claimed in claim 1 wherein the aldose or ketose is hyrolyzed starch or cellulose.
Claim 4
Dependent Claim
19 words
The process as claimed in claim 1 which is carried out at a temperature of 80° to 130° C.
Claim 5
Dependent Claim
37 words
The process as claimed in claim 1 wherein the reducing agent is selected from the group consisting of the free acid form or water-soluble salts of phosphorous, hypophosphorous, sulfurous, hyposulfurous, nitrous and hyponitrous acid and mixtures thereof.
Claim 6
Dependent Claim
28 words
The process as claimed in claim 1 wherein fatty alcohol not consumed during the reaction is removed from the reacted mixture in the presence of the reducing agent.
Claim 7
Dependent Claim
30 words
The process as claimed in claim 1 wherein the aldose or ketose is selected from the group consisting of arabinose, galactose, glucose, mannose, ribose, xylose, saccharose, maltose, lactose and raffinose.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |