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US 7,767,766 B2Granted
Method of manufacture of polyacrolein
AssigneeChemeq Ltd.
InventorMatthew Tilbrook
Life of this patent
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Abstract
A method of manufacture of soluble, microbiologically active and stable acrolein polymer comprising: (a) polymerising acrolein in the presence of base to form a polymer of acrolein; (b) dissolving the polymer of acrolein in an alcohol selected from monoalcohols and polyols optionally with addition of water to form an alcohol solution of the polymer of acrolein; (c) heating the alcohol solution of the polymer of acrolein; and (d) mixing base with the polymer of acrolein.
Claims19
A method of manufacture of a soluble, microbiologically active and stable acrolein polymer comprising the following steps in sequence:
- (a) polymerising acrolein in the presence of base to form a polymer of acrolein;
- (b) dissolving the polymer of acrolein in an alcohol selected from monoalcohols and polyols optionally with addition of water to form an alcohol solution of the polymer of acrolein, and providing a pH of no more than 7, wherein the polymer of acrolein is not subject to heating in air before dissolving in alcohol;
- (c) heating the alcohol solution of the polymer of acrolein of pH of no more than 7, to a temperature in the range of from 40 to 105° C., to react the polymer of acrolein with the alcohol;
- and (d) mixing base with the polymer of acrolein, wherein the polymer product of said method does not precipitate when further diluted by water by a factor of one in ten parts by volume.
1 more element
Dependencies are inferred from the claim text.