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US3637523A
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Esters of glycerol and polyhydric alcohol copolymers useful as emulsifying agents and process for their production
Assignee: SCM Corp
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Filing: 1968-09-12
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Granted: 1972-01-25
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Expires: 1988-09-12
Abstract
Abstract This invention relates to a class of emulsifying agents which have been found to be particularly useful in food and bakery products. Basically, the emulsifying agents are esters of a copolymer of glycerin and a polyhydric alcohol other than glycerin. The polyhydric alcohol employed can have from two to six carbon atoms in the molecular structure. The mole ratio of glycerin to polyhydric alcohol is from about 0.1:1 to 10:1. The esters are produced generally by reacting the copolymer with a carboxylic acid or carboxylic acid radical donating compound which has from eight to 22 carbon atoms and, preferably, the acid radical donated is a fatty acid radical.
Inventors
- 👤 James Harwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:51
CPC Classifications
C; C09; C09K; C09K23/00; C09K23/34; Y; Y10; Y10S; Y10S516/00; Y10S516/905; Y10S516/917; Y10S516/918
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
The emulsifying agent claim 1, wherein the ratio of glycerin to polyhydric alcohol is between about 1:1 to 4:1 moles glycerin per mole of polyhydric alcohol, the molecular weight of the copolymers being between about 200-1,000 and the degree of esterification is about one ester group per four hydroxyl groups.
Claim 2
Dependent Claim
21 words
The emulsifying agents claim 1, wherein said polyhydric alcohol is propylene glycol and said fatty acid has from 15-20 carbon atoms.
Claim 3
Dependent Claim
21 words
The emulsifying agent of claim 2, wherein said polyhydric alcohol is sorbitol and said fatty acid has from 15-20 carbon atoms.
Claim 4
Dependent Claim
116 words
The process for producing an emulsifying agent which comprises the steps of: forming copolymers of glycerin and at least one polyhydric alcohol other than glycerin selected from the group consisting of aliphatic and cyclic saturated aliphatic alcohols having from two to six carbon atoms, the ratio of glycerin to polyhydric alcohol being from about 0.1:1 to 10:1 moles glycerin per mole of polyhydric alcohol by polymerizing glycerin and said polyhydric alcohol, said copolymers having a molecular weight of between about 100 and 5,000; and esterifying said copolymers with a fatty acid having from eight to 22 carbon atoms producing esterified copolymers having from about one-half to two ester groups per four hydroxyl groups in said copolymers.
Claim 5
Dependent Claim
72 words
The process of claim 5, wherein said forming is at a temperature between 180* - 300* C. in the presence of an alkali metal hydroxide catalyst, said ratio of glycerin to polyhydric alcohol is between about 1:1 to 4:1, said molecular weight is between about 200- 1,000 and said esterification is about one ester group per four hydroxyl groups in said copolymers, and said polymerization and said esterification are carried out simultaneously.
Claim 6
Dependent Claim
23 words
The process of claim 6, wherein said polyhydric alcohol is sorbitol and said fatty acid has from 15-20 carbon atoms in the structure.
Claim 7
Dependent Claim
24 words
The process of claim 6, wherein said polyhydric alcohol is propylene glycol and said fatty acid has from 15-20 carbon atoms in the structure.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |