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1. WO1992017424 - ENDUITS AMELIORES COMPRENANT DES POLYMERES CARBOXYLES, NEUTRALISES ET RETICULES PAR VOIE IONIQUE ET DE MANIERE COVALENTE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS :

1. A composite comprising:

(a) a substrate; and

(b) a polymeric coating adhered to at least one surface of said substrate, said polymer coating having a thickness of about 1 to about 100 micrometers, wherein said polymer coating comprises an ionically and covalently crosslinked neutralized carboxylated polymer having a carboxylate content of about 5 to about 300 meq . per 100 grams of said covalently crosslinked neutralized carboxylated polymer.

2. The composite according to claim 1 wherein said carboxylate groups are neutralized with an ammonium or metal counterion.

3. The composite according to claim 2 wherein the carboxylate groups are at least 20 mole percent neutralized.

4. The composite according to claim 1 wherein the substrate is a fertilizer.

5. The composite according to claim 4 wherein the substrate is urea.

6. The composite according to claim 1 wherein the substrate is a nutrient.

7. The composite according to claim 1 wherein the substrate is a pesticide.

8. A composition according to claim 1 wherein said ionically and covalently crosslinked neutralized carboxylated polymer is characterized by the structure:

R
I
(CH -CH2}X- - (CH2-C)y- I
C=0
I
0-M+

wherein y is about 0.1 to about 30 mole percent, and x+y equals 100 mole percent; R is hydrogen or a methyl or an ethyl group; wherein M+ is selected from the group consisting of ammonium, amine counterions and metal counterions, preferably those selected from the group consisting of lead, antimony, zinc, tin and Groups IA, IB, IIA and IIB of the Period Table of Elements.

9. A method for treating seeds or plants which comprises placing in close proximity thereto a composite comprising (i) a substrate selected from the group consisting of fertilizers, pesticides, herbicides, nutrients and mixtures thereof, and (ii) a polymeric coating adhered to at least a portion of the surface of the substrate, said coating having a thickness of about 1 to 100 micrometers and comprising an ionically and covalently crosslinked, neutralized carboxylated polymer having a carboxylate content of about 5 to about 300 meq./lOO grams of said carboxylated polymer.

10. The method of claim 9 wherein the substrate comprises a fertilizer.