Anionic polymers composed of dicarboxylic acids and uses thereof

a technology of dicarboxylic acid and anionic polymer, which is applied in the field of anionic polymers composed of dicarboxylic acids, can solve the problems of significant limitation in use, affecting the application, and reducing the utility of the polymer,
US20030194492A1Inactive Publication Date: 2003-10-16SPECIALTY FERTILIZER PROD LLC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SPECIALTY FERTILIZER PROD LLC
Publication Date
2003-10-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and / or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.
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Description

[0001] This is a divisional of application Ser. No. 09 / 799,210, filed Mar. 5, 2001, which is hereby incorporated by reference herein.BACKGROUND OF INVENTION

[0002] 1. Field of the Invention

[0003] The present invention is broadly concerned with novel substantially biodegradable and substantially water soluble anionic polymers and derivatives thereof which have significant utility in agricultural applications, especially plant nutrition and related areas. More particularly, the invention is concerned with such polymers, as well as methods of synthesis and use thereof, wherein the preferred polymers have significant levels of anionic groups. The most preferred polymers of the invention include recurring polymeric subunits made up of dicarboxylic (e.g., maleic acid or anhydride, itaconic acid or anhydride, and other derivatives thereof monomers. The polymers may be applied directly to the ground adjacent growing plants, complexed onto ions, applied directly to seeds, and / or mixed with or...

Claims

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