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| Synthetic polymerization | Polyacrylic acids |
| Polyvinyl alcohol |
| Polyacrylonitrile |
| Polyacrylamide |
| Polyoxyethylene |
| Natural polymer modification | Starch | Starch grafted monobasic acid (such as starch grafted acrylonitrile and starch grafted acrylic acid,) |
| Starch grafted polyacid (starch grafted acrylic acid and acrylamide, starch grafted methyl acrylate and propylene alcohol, etc.) |
| Carboxymethylated starch |
| Phosphate esterified starch |
| Starch xanthate |
| Cellulose | Cellulose/acrylic polymer/montmorillonite super absorbent composite water retaining agent |
| Cellulose grafted acrylonitrile hydrolysate |
| Crosslinking of epichlorohydrin after carboxymethylation of cellulose |
| Hydroxypropyl cellulose |
| Xanthated cellulose |
| Humic acids | Cellulose-humic acid-acrylic acid water retaining agent
Humic acid-polyacrylic acid water retaining agent |
| Humic acid-acrylamide-acrylic water retaining agent |
| Humic acid-clay-polyacrylic acid water retaining agent |
| Humic acid-starch-polyacrylic acid water retaining agent |
| Other natural | Pectin |
| Chitosan |
| Agarose |
| Proteins (soybean protein, etc.) |
| Organic-inorganic composite | Kaolin/sodium alginate grafted acrylic acid and acrylamide composite water retaining agent |
| Organic bentonite/acrylic acid copolymer composite super absorbent water retaining agent |
| Mica powder polypropionic acid crosslinked water retaining agent |
| New water retaining agent | Bamboo fiber grafted potassium acrylate water retaining agent, bamboo fiber grafted acrylamide water retaining agent
Modified bamboo fiber water retaining agent |
| New seaweed biological water retaining agent (using seaweed and acrylic acid as raw materials) |
| Modified cotton stalk cellulose salt tolerant water retaining agent (with cotton stalk and acrylic acid as raw materials) |
| Aminoethyl chitosan-acrylic acid water retaining agent |
| Xanthate-humic acid-nitrogen (2-hydroxyethyl) ethylenediamine degradable water retaining agent |
Chitosan-citric acid-urea water retaining agent
Apple pomace water retaining agent |
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