Abstract: A polymer may be an absorbent polymer used for forming a so-called SAP. Through adjustment of materials applied to a cross-linking process for forming the SAP, and conditions of the cross-linking process, such a polymer may be formed even without using a so-called cross-linking agent or by minimizing its used amount, thereby exhibiting excellent absorption capacity. The polymer may be formed by cross-linking a biodegradable material, even without using the cross-linking agent or by minimizing the same, thereby exhibiting the maximum biodegradability of the material.

Abstract: A polymer composition may have excellent biodegradability and absorption capacity. The polymer composition may include a polysaccharide component. The polymer composition may have excellent biodegradability and absorption capacity by controlling the ratio of amylose in the polysaccharide component, the ratio of amylopectin in the polysaccharide component, and the molecular weight of the polysaccharide component.

Abstract: Provided is an antibacterial composition comprising at least one compound including a quaternary ammonium structure having an acrylate group or a methacrylate group, and having an antibacterial strength A of 90% or more against at least one strain selected from Gram-positive bacteria and Gram-negative bacteria, and an acute oral toxicity dose LD50 of 300 mg/Kg or more, where the antibacterial strength A equals (1?Asample/AReference)×100, where Asample equals an absorbance of an inoculated medium solution incubated with the antibacterial composition, and AReference equals an absorbance of an inoculated medium solution incubated without addition of the antibacterial composition.