EP0380254B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Form-in-place polysaccharide gels
Assignee: 3M Co
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Filing: 1990-01-19
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Granted: 1994-06-29
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Expires: 2010-01-19
Abstract
No abstract record available.
Inventors
- 👤 James E. C/O Minnesota Mining And Garbe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 05:10
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; A; A61; A61L; A61L26/00; A61L26/0009; A61L26/0023; A61L26/0061; A61L26/008; C08J3/24; C08J3/241; C08L; C08L5/00; C08L5/04; C08J2305/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A self-contained gel-forming article comprising: (1) a first chamber containing a first component comprising an aqueous solution of a water-soluble polysaccharide bearing pendant carboxylate groups having suspended therein particles of a water-insoluble di- or trivalent metal salt that will react with an acid to form a water-soluble metal salt, and that has a di- or trivalent metal ion capable of complexing with the pendant carboxylate groups of said water-soluble polysaccharide to form a water-insoluble polysaccharide gel; (2) a second chamber containing a second component comprising an aqueous solution of a water-soluble acid; and (3) a means connected to said first and second chambers for intermixing said first and second components without exposing said components to the atmosphere or to any external mixing devices.
Claim 2
Dependent Claim
36 words
The self-contained gel-forming article as recited in claim 1 wherein said first and second chambers are permanently separated and each of said first and second chambers have a discharge opening leading to a common mixing chamber.
Claim 3
Dependent Claim
28 words
The self-contained gel-forming article according to any preceding claim wherein said water-soluble polysaccharide is selected from ammonium, magnesium, potassium, sodium, lithium, rubidium, and cesium salts of alginic acid.
Claim 4
Dependent Claim
30 words
The self-contained gel-forming article according to any preceding claim wherein said water-insoluble di- or trivalent metal salt is selected from calcium carbonate, calcium phosphate dibasic, barium carbonate and zinc carbonate.
Claim 5
Dependent Claim
22 words
The self-contained gel-forming article according to any preceding claim wherein said water-soluble acid is selected from acetic, adipic, fumaric and lactic acids.
Claim 6
Dependent Claim
23 words
The self-contained gel-forming article according to any preceding claim wherein said second component further comprises water-soluble polysaccharide bearing pendant carboxylate groups dissolved therein.
Claim 7
Dependent Claim
50 words
The self-contained gel-forming article according to any preceding claim wherein said first component comprises a liquid component comprising a suspension of calcium carbonate particles in an aqueous solution of sodium alginate, and wherein said second component comprises a liquid component comprising an aqueous solution of sodium alginate and acetic acid.
References Cited (Backward Citations)
No citation records indexed.
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