DESC:WE CLAIM

1. A plant nutrient carrying super water absorbent polymer product comprising a grafted co-polymer and a sulfur containing compound linked to the grafted co-polymer, the grafted co-polymer comprising at least one polyglucosyl polymer chain linked to the at least one acrylic acid or acrylate polymer chain and a cross linking agent.

2. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the at least one polyglucosyl polymer chain being present in an amount in a range of 18% to 90% by weight of the grafted co-polymer; the cross linking agent being present in an amount in a range of 0.1 to 10 % by weight of the grafted co-polymer; and a remaining amount of the grafted co-polymer being the at least one acrylic acid or acrylate polymer chain, the polyglucosyl polymer chain being a modified starch.

3. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, comprises un-modified hydroxyapatite nanoparticles having a size in the range of 1 to 30 nm and/or a modified hydroxyapatite nanoparticles having a size in the range of 1 to 60 nm being present in an amount of about 1 to 10% by weight of super water absorbent polymer.

4. The plant nutrient carrying super water absorbent polymer as claimed in claim 3, wherein the modified starch is selected from a group comprising an enzymatically modified starch, dextrinised starch, an acid treated starch, an alkali treated starch, a bleached starch, an oxidized starch, mono-starch phosphate, di-starch phosphate, phosphated di-starch phosphate, acetylated distarch phosphate, starch acetate, hydroxypropyl starch, hydroxypropyl distarch phosphate, starch sodium octenyl succinate, acetylated oxidized starch, and starch aluminum octenyl succinate.

5. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the cross-linkers include methylene bis-acrylamide (MBA) or Trimethylolpropane triacrylate (TMPTA) or Trimethylolpropane ethoxylate triacrylate (EO-TMPTA), polyethylene glycol diacrylate (PEGDA).

6. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the acrylic acid or acrylate polymer chain comprises acrylic acid monomer and a neutralizing agent, the acrylic acid monomer neutralized to an extent of 40% to 90% by the neutralizing agent.

7. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the sulfur containing compound being an acrylamidoalkanesulfonic acid of formula I:

wherein R1 being hydrogen or a lower alkyl radical and each of R1, R2, R3, R4, R5 and R6 being individually hydrogen or a hydrocarbon radical.

8. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the acrylamidoalkanesulfonic acid of formula I being 2-acrylamido-2-methyl-1 propanesulfonic acid.

9. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the acrylamidoalkanesulfonic acid of formula I being present in an amount ranging from 5 to 20 wt.% of the acrylic acid or acrylate polymer chain.

10. A process for preparing the plant nutrient carrying super water absorbent polymer product as claimed in claim 1, said process comprising: mixing at least one acrylic acid or acrylate monomer, a polyglucosyl polymer, a cross-linking agent and a sulfur containing compound under a polymerizing condition to obtain the plant nutrient carrying super water absorbent polymer product.
,CLAIMS:WE CLAIM

1. A plant nutrient carrying super water absorbent polymer product comprising a grafted co-polymer and a sulfur containing compound linked to the grafted co-polymer, the grafted co-polymer comprising at least one polyglucosyl polymer chain linked to the at least one acrylic acid or acrylate polymer chain and a cross linking agent.

2. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the at least one polyglucosyl polymer chain being present in an amount in a range of 18% to 90% by weight of the grafted co-polymer; the cross linking agent being present in an amount in a range of 0.1 to 10 % by weight of the grafted co-polymer; and a remaining amount of the grafted co-polymer being the at least one acrylic acid or acrylate polymer chain, the polyglucosyl polymer chain being a modified starch.

3. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, comprises un-modified hydroxyapatite nanoparticles having a size in the range of 1 to 30 nm and/or a modified hydroxyapatite nanoparticles having a size in the range of 1 to 60 nm being present in an amount of about 1 to 10% by weight of super water absorbent polymer.

4. The plant nutrient carrying super water absorbent polymer as claimed in claim 3, wherein the modified starch is selected from a group comprising an enzymatically modified starch, dextrinised starch, an acid treated starch, an alkali treated starch, a bleached starch, an oxidized starch, mono-starch phosphate, di-starch phosphate, phosphated di-starch phosphate, acetylated distarch phosphate, starch acetate, hydroxypropyl starch, hydroxypropyl distarch phosphate, starch sodium octenyl succinate, acetylated oxidized starch, and starch aluminum octenyl succinate.

5. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the cross-linkers include methylene bis-acrylamide (MBA) or Trimethylolpropane triacrylate (TMPTA) or Trimethylolpropane ethoxylate triacrylate (EO-TMPTA), polyethylene glycol diacrylate (PEGDA).

6. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the acrylic acid or acrylate polymer chain comprises acrylic acid monomer and a neutralizing agent, the acrylic acid monomer neutralized to an extent of 40% to 90% by the neutralizing agent.

7. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the sulfur containing compound being an acrylamidoalkanesulfonic acid of formula I:

wherein R1 being hydrogen or a lower alkyl radical and each of R1, R2, R3, R4, R5 and R6 being individually hydrogen or a hydrocarbon radical.

8. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the acrylamidoalkanesulfonic acid of formula I being 2-acrylamido-2-methyl-1 propanesulfonic acid.

9. The plant nutrient carrying super water absorbent polymer as claimed in claim 1, wherein the acrylamidoalkanesulfonic acid of formula I being present in an amount ranging from 5 to 20 wt.% of the acrylic acid or acrylate polymer chain.

10. A process for preparing the plant nutrient carrying super water absorbent polymer product as claimed in claim 1, said process comprising: mixing at least one acrylic acid or acrylate monomer, a polyglucosyl polymer, a cross-linking agent and a sulfur containing compound under a polymerizing condition to obtain the plant nutrient carrying super water absorbent polymer product.