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EP0070023A2
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Process for producing water-insoluble polymers of uniform shape
Assignee: Eneos Corp
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Filing: 1982-07-12
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Granted: —
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Expires: 2002-07-12
Abstract
Abstract A process for producing a water-insoluble polymer of uniform shape having high strength and a desired geometric form is disclosed. This process comprises the steps of dissolving or partially suspending in water (a) a water-soluble salt of alginic acid, (b) a hydrophilic, crosslinkable vinyl monomer having two or more radical-polymerizable vinyl groups per molecule, and (c) optionally a hydrophilic, radical-polymerizable vinyl monomer; bringing the resulting aqueous solution or suspension into contact with an aqueous solution capable of causing gelation of the water-soluble salt of alginic acid and thereby forming an water-insoluble gel of uniform shape; and subjecting the gel to radical polymerization to produce a water-insoluble polymer.
Inventors
- 👤 Ko Sakata
- 👤 Hirosuke Imai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 17:16
CPC Classifications
C; C12; C12N; C12N11/00; C12N11/02; C12N11/04; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A process for producing a water-insoluble polymer of uniform shape which comprises the steps of dissolving or partially suspending in water (a) a water-soluble salt of alginic acid, (b) a hydrophilic, crosslinkable vinyl monomer having two or more radical-polymerizable vinyl groups per molecule, and (c) optionally a hydrophilic, radical-polymerizable vinyl monomer; bringing the resulting aqueous solution or suspension into contact with an aqueous solution capable of causing gelation of the water-soluble salt of alginic acid and thereby forming a water-insoluble gel of uniform shape; and subjecting the gel to radical polymerization to produce a water-insoluble polymer.
Claim 2
Dependent Claim
96 words
A process for producing a water-insoluble polymer of uniform shape which comprises the steps of dissolving or partially suspending in water (a) a water-soluble salt of alginic acid, (b) a hydrophilic, crosslinkable vinyl monomer having two or more radical-polymerizable vinyl groups per molecule, and (c) optionally a hydrophilic, radical-polymerizable vinyl monomer; bringing the resulting aqueous solution or suspension into contact with an aqueous solution capable of causing gelation of the water-soluble salt of alginic acid and thereby forming a water-insoluble gel of uniform shape; and subjecting the gel to radical polymerization to produce a water-insoluble polymer.
Claim 3
Dependent Claim
38 words
A process as claimed in claim 1 wherein the ratio of the hydrophilic, crosslinkable vinyl monomer having two or more vinyl monomers per molecule to the hydrophilic, radical-polymerizable vinyl monomer is in the range of 0.05:0 to 0.05:100.
Claim 4
Dependent Claim
53 words
A process as claimed in claim 1 wherein the combined amount of the hydrophilic, crosslinkable vinyl monomer having two or more radical-polymerizable vinyl groups per molecule and the hydrophilic, radical-polymerizable vinyl monomer is in the range of 0.1 to 50% by weight based on the total amount of the aqueous solution or suspension.
Claim 5
Dependent Claim
33 words
A process as claimed in claim 1 wherein the concentration of the water-soluble salt of alginic acid in the aqueous solution or suspension is in the range of 0.1 to 20% by weight.
Claim 6
Dependent Claim
33 words
A process as claimed in claim 4 wherein the concentration of the water-insoluble salt of alginic acid in the aqueous solution or suspension is in the range of 0.5 to 10% by weight.
Claim 7
Dependent Claim
24 words
A process as claimed in claim 1 which further includes the step of adding a free radical initiator to the aqueous solution or suspension.
Claim 8
Dependent Claim
32 words
A process as claimed in claim 1 which further includes the step of removing the salt of alginic acid subsequently to the radical polymerization of the gel to produce a water-insoluble polymer.
Claim 9
Dependent Claim
24 words
A process as claimed in claim 1 which further includes the step of adding yeast or other microorganisms to the aqueous solution or suspension.
Claim 10
Dependent Claim
13 words
A water-insoluble polymer produced by the process of claim 1, 7, or 8.
References Cited (Backward Citations)
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