Polymer material

Abstract

The invention relates to polymer materials and uses thereof. The present application can provide a polymer material having both excellent biodegradability and absorbability by using a polysaccharide component which can be effectively cross-linked without using a cross-linking agent which may adversely affect biodegradability or with minimal use of the related component. The invention also provides application of the polymer material.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0062381, dated May 20, 2022, the disclosure of which is incorporated herein by reference in its entirety.

[0002] The present invention relates to polymer materials and their uses. Background Art

[0003] Hydrogel polymers are generally defined as cross-linked hydrophilic polymers and are also referred to simply as hydrogels.

[0004] Such polymers can be used as materials called SAP (Super Absorbent Polymer). SAP is a material that can absorb tens to thousands of times its own weight of water. SAP is used in various applications, such as sanitary products such as sanitary products or diapers, medical products, household materials, agricultural materials, gardening materials, transportation materials, civil engineering and construction materials, materials related to electrical and electronic equipment, or water treatment agents.

[0005] The most widely used hydrogel polymers used as SAPs are polymers made from vinyl-based materials such as cross-linked polyacrylic acid.

[0006] Such a material is relatively inexpensive and has excellent water absorption capacity, but it causes various problems because it remains semi-permanently even after being discarded.

[0007] In order to solve such problems, various attempts have been made to manufacture SAP from so-called biodegradable materials.

[0008] However, materials known so far cannot form SAPs with balanced physical properties. For example, the most representative physical property required for SAP is absorption capacity, but in SAPs of biodegradable materials known so far, at least one of absorption capacity and biodegradability cannot be satisfactorily ensured, or in some cases, both physical properties cannot be ensured at appropriate levels.

[0009] For example, attempts have been made to manufacture absorbent materials using polysaccharides. Since polysaccharides are biodegradable, the absorbent materials are also biodegradable. In this technology, in order to form SAP, the polysaccharide must be cross-linked, wherein acrylate-based compounds or vinyl-based compounds are mainly used for such cross-linking. SAP cross-linked with such materials can ensure a certain degree of absorption capacity, but has the problem of reduced biodegradability. Therefore, if cross-linking is performed without using any cross-linking agent or while minimizing the amount used, absorption capacity and biodegradability can be ensured, but considering the cross-linking efficiency of the polysaccharide, this method is not easy. Summary of the invention

[0010] Technical issues

[0011] The present application aims to provide a polymer material capable of simultaneously ensuring excellent absorption capacity and biodegradability and use thereof.

[0012] Technical Solution

[0013] Among the physical properties mentioned in this specification, when the measurement temperature and / or pressure affect the value of the physical property, unless specifically mentioned otherwise, the relevant physical property means the physical property measured at room temperature and / or normal pressure.

[0014] In the present specification, the term room temperature is a natural temperature without heating or cooling, and may mean, for example, any temperature within a range of about 10°C to 30°C, or a temperature around 23°C or 25°C.

[0015] In the present specification, the term normal pressure refers to a pressure when it is not particularly reduced or increased, and may mean a pressure of about standard atmospheric pressure, for example, about 740 mmHg to 780 mmHg.

[0016] Among the physical properties mentioned in this specification, when measuring the physical property value affected by humidity, unless otherwise specified, the physical property means the physical property measured at natural humidity without special adjustment at the temperature and pressure of measurement.

[0017] In this specification, unless otherwise stated, the term alkyl or alkyl group means an alkyl or alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms. Such an alkyl or alkyl group can be linear, branched or cyclic. Such an alkyl or alkyl group can also be optionally substituted with one or more substituents.

[0018] In this specification, unless otherwise indicated, term alkylene or alkylene group means the functional group that is connected to other object by separating two hydrogen atoms from alkane, wherein it has the structure of separating two hydrogen atoms from the different carbon atoms of alkane.Such alkylene or alkylene group can be alkylene or alkylene group with 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms or 2 to 4 carbon atoms.Such alkylene or alkylene group can be linear, branched or cyclic.Such alkylene or alkylene group also can optionally replace through one or more substituents.

[0019] In this specification, unless otherwise indicated, the term alkylidene or alkylidene group means a functional group connected to another object by separating two hydrogen atoms from an alkane, wherein it has a structure that separates two hydrogen atoms from one carbon atom of an alkane. Such an alkylidene or alkylidene group can be an alkylidene or alkylidene group with 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms. Such an alkylidene or alkylidene group can be linear, branched or cyclic. Such an alkylidene or alkylidene group can also optionally be substituted through one or more substituents.

[0020] In the present application, the term hydrogel polymer material means an absorbent material comprising a cross-linked polymer. In the present specification, such a material may also be referred to simply as a hydrogel.

[0021] The absorbent materials described herein may exhibit at least one of moisture content, centrifuge retention capacity (CRC), and absorption capacity under pressure (AUP).

[0022] In the present specification, a biodegradable material means that the material can show the biodegradability specified in the present specification (measured according to KS M ISO 14851 standard).

[0023] The present application relates to polymer materials. The polymer material can be the above-mentioned absorbent material and at the same time a biodegradable material.

[0024] In this specification, the term polymer material means a material comprising a polymer. A polymer may mean a substance formed by connecting two or more units by covalent bonds. In an example, a polymer may mean a substance comprising a structure in which two or more units are connected by covalent bonds and having a certain level or greater molecular weight. The range of molecular weight is not limited, but in terms of weight average molecular weight (Mw), the molecular weight of the polymer may be about 500g / mol or greater. The upper limit of the weight average molecular weight is not particularly limited, for example, the weight average molecular weight of the polymer may be about 1,000,000g / mol or less. The weight average molecular weight is a value measured by GPC (Gel Permeation Chromatograph) using polystyrene as a calibration standard sample.

[0025] In one example, the weight ratio of the polymer in the polymer material can have a lower limit of about 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, 80 wt%, 85 wt%, 90 wt%, or 95 wt%, and an upper limit of about 100 wt%, 100 wt%, 98 wt%, 96 wt%, 94 wt%, 92 wt%, or 90 wt%. The weight ratio of the polymer can be in a range greater than or equal to, or greater than any of the above lower limits; in a range less than or equal to, or less than any of the above upper limits; or in a range less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits.

[0026] The polymer of the present application may be a polysaccharide component.

[0027] In this specification, the term polysaccharide component means a component composed of a polysaccharide in one molecule or a plurality of polysaccharides in two or more molecules. That is, the polysaccharide component contains only polysaccharides, but the polysaccharide contained in the polysaccharide component may have two or more molecules. When two or more molecules of polysaccharides are contained, the polysaccharides may be the same or different from each other.

[0028] In this specification, the term polysaccharide has a meaning known in the industry. Polysaccharides generally refer to polymer molecules in which two or more unit bodies are connected by covalent bonds. In one example, the covalent bonds connecting the unit bodies can be glycosidic bonds. Polysaccharides are polymer molecules, i.e. polymers, which can have a weight average molecular weight within the above range.

[0029] The unit body forming the polysaccharide can be a biomolecule composed of carbon, hydrogen and oxygen, or composed of carbon, hydrogen, oxygen and nitrogen. In this specification, the term biomolecule is interpreted as having the meaning commonly used in industry. Typically, as an example of a biomolecule in industry, monosaccharides such as glucose, galactose, fructose or xylose are known; disaccharides such as sucrose, lactose, maltose or trehalose; polyols such as sorbitol or mannitol; oligosaccharides such as maltodextrin, dextrin, raffinose, stachyose or oligofructose; and / or amino sugars such as glucosamine or N-acetylglucosamine; etc., but the types of biomolecules used in this application are not limited to the aforementioned.

[0030] If the polymer (eg, polysaccharide component) contained in the polymer material is in a cross-linked state and has absorption capacity, the relevant polymer material may be referred to as a hydrogel polymer material or a hydrogel.

[0031] In one example, the polymer material may be in a powder state formed through a grinding process or the like.

[0032] The polymer material may contain only the polysaccharide component as a polymer, or may contain other components in addition to the polysaccharide component. In the polymer material, the polysaccharide component may exist in a cross-linked state.

[0033] In the polymer material, examples of additional components that may be included together with the polysaccharide component are not particularly limited, but may be exemplified by a cross-linking agent that cross-links the polysaccharide or a polymer other than the polysaccharide, and the like.

[0034] In one example, the weight ratio of the polysaccharide component in the polymer material can have a lower limit of about 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, 80 wt%, 85 wt%, 90 wt%, 92 wt%, 94 wt%, 96 wt%, or 98 wt%, and an upper limit thereof can be about 100 wt%, 98 wt%, 96 wt%, 94 wt%, 92 wt%, or 90 wt%. The weight ratio can be in the range of greater than or equal to, or greater than any of the above lower limits; in the range of less than or equal to, or less than any of the above upper limits; or in the range of less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits.

[0035] The ratio of the polysaccharide component in the polymer material is not particularly limited, but the higher the ratio, the greater the biodegradability of the polymer material. In the present application, when a specific type of polysaccharide component is applied as the polysaccharide component, appropriate cross-linking can be performed without using a cross-linking agent that can reduce biodegradability or minimizing the amount used, and the cross-linked material can simultaneously exhibit excellent absorption capacity and biodegradability as desired.

[0036] When the polymer material is an absorbent material, the polymer material can exhibit a moisture content of about 40% to about 70% by weight. In another example, the moisture content can be about 45% by weight or more, 50% by weight or more, or about 55% by weight or more, or about 65% by weight or less, or about 60% by weight or less.

[0037] The moisture content is the content of moisture contained in the polymer material relative to the total weight of the polymer to be measured, which can be calculated by the weight of the polymer material containing moisture and the weight of the dried polymer material. For example, the moisture content can be calculated by the weight loss caused by the evaporation of moisture in the polymer material during the process of drying the polymer material in a crumb state by increasing the temperature thereof by infrared heating. The drying process for measuring the moisture content may include increasing the temperature from room temperature to about 50°C, and then performing vacuum drying for about 6 hours while maintaining 50°C. The polymer material may exhibit the moisture content before or after cross-linking.

[0038] When the polymer material is an absorbent material, the lower limit of the centrifuge retention capacity (CRC) of the polymer material according to EDANA (European Disposables and Nonwovens Association) method WSP 241.3 can be about 12g / g, about 13g / g, about 14g / g, about 15g / g, 16g / g, 17g / g, or 17.5g / g, and the upper limit thereof can be about 60g / g, 55g / g, 50g / g, 45g / g, 40g / g, 35g / g, 30g / g, 25g / g, 20g / g, 19g / g, or 18g / g. The centrifuge retention capacity can be in a range greater than or equal to, or greater than any of the above lower limits; in a range less than or equal to, or less than any of the above upper limits; or in a range less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits. The polymeric material may exhibit the centrifuge retention capacity before or after cross-linking.

[0039] When the polymeric material is an absorbent material, the polymeric material may have an absorption capacity under pressure (AUP) at 0.7 psi according to EDANA (European Disposables and Nonwovens Association) method WSP 242.3 of about 4 g / g, 6 g / g, 8 g / g, 10 g / g, 12 g / g, 14 g / g, 16 g / g, 18 g / g, 20 g / g, 22 g / g, 24 g / g, or about 26 g / g, and an upper limit thereof may be about 40 g / g, 38 g / g, 36 g / g, 34 g / g, or about 32 g / g. The absorption capacity under pressure may be in a range greater than or equal to, or greater than any of the above lower limits; in a range less than or equal to, or less than any of the above upper limits; or in a range less than or equal to, or less than any of the above upper limits while greater than or equal to, or greater than any of the above lower limits. The polymeric material may exhibit the absorption capacity under pressure before or after crosslinking.

[0040] If a polymeric material exhibits at least one of the properties of moisture content, centrifuge retention capacity and absorption capacity under pressure as described above, the relevant material may be qualified as an absorbent material.

[0041] The polymer material can exhibit excellent biodegradability. For example, the polymer material can be an absorbent material and a biodegradable material at the same time. For example, the lower limit of the biodegradability of the polymer material can be about 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 78%, 80%, 82%, 84%, 86%, or 88%, and its upper limit can be about 100%, 98%, 96%, 94%, 92%, 90%, or 88%. The biodegradability can be in a range greater than or equal to, or greater than any one of the above lower limits; in a range less than or equal to, or less than any one of the above upper limits; or in a range less than or equal to, or less than any one of the above upper limits and greater than or equal to, or greater than any one of the above lower limits. The polymer material can exhibit the biodegradability before or after cross-linking. The biodegradability is determined according to the KS M ISO 14851 standard. The biodegradability presents differently depending on the measurement method. For example, KS M ISO 14855-1 is a method for measuring biodegradability by carbon dioxide under composting conditions, where a higher level of biodegradability is measured for the same material compared to other measurement methods, but it cannot well represent the biodegradability of the material in the actual environment. KS MISO 14851 standard is a method for measuring the aerobic biodegradability of polymer materials in aqueous media (measuring the oxygen consumption of a closed breathing system), where the biodegradability of this method can well reflect the biodegradability characteristics of the material in the actual environment.

[0042] As described above, the polymer material of the present application can simultaneously exhibit excellent absorbency and biodegradability.

[0043] Such a material can be obtained by applying a polysaccharide component to be described below as a polysaccharide component. Generally, a polymer material based on polysaccharides has excellent biodegradability, but has low water absorption capacity and low crosslinking efficiency for application as an absorbent material. Therefore, generally, in order to form an absorbent material using a polysaccharide-based material, it is obtained by blending other components with the polysaccharide, rather than applying only the polysaccharide. However, in the present application, a polysaccharide component in which a specific type of functional group is introduced at a predetermined ratio is applied as a polysaccharide component. Such a polysaccharide component can be crosslinked without using a crosslinking agent that may adversely affect biodegradability or while applying a minimum amount, and can also be self-crosslinked, which is described below. Such a polysaccharide component can simultaneously exhibit excellent absorption capacity and biodegradability after crosslinking. The crosslinking mentioned in this specification means the primary crosslinking of the polysaccharide component without crosslinking. That is, if necessary, after crosslinking or self-crosslinking without using a crosslinking agent that may adversely affect biodegradability or while applying a minimum amount, the polysaccharide component can be further crosslinked. When further crosslinking is performed in this way, a crosslinking agent such as an acrylate series can also be used.

[0044] As described above, the polysaccharide is a polymeric substance in which two or more units are linked by a covalent bond such as a glycosidic bond, and representative known polysaccharides include starch, dextrin, or chitosan and the like.

[0045] In one example, when the polysaccharide is starch, the weight ratio of amylose to amylopectin in the relevant starch (amylose: amylopectin) can be in the range of about 1:99 to about 50:50. In this case, the functional groups described below can be introduced into amylose or amylopectin, or can be introduced into both. The reaction of introducing the functional groups described below can occur in both amylose and amylopectin, but when the content of amylopectin is greater than that of amylose, it may be more effectively modified.

[0046] For example, the starch may have a gelatinization temperature in the range of about 50°C to 90°C and a peak viscosity (BU) in the range of 50 to 1,000.

[0047] As the starch, any known starch may be applied without particular limitation, and for example, one or two or more types selected from potato starch, corn starch, rice starch, wheat starch, tapioca starch, and polymer starch may be applied.

[0048] Such polysaccharides may include at least two or more monosaccharide units connected by a covalent bond (e.g., a glycosidic bond). At this time, the monosaccharide unit may be exemplified by the above-mentioned biomolecules, and may be specifically exemplified by glucose, galactose, fructose, xylose, glucosamine, or N-acetylglucosamine, etc., but is not limited thereto.

[0049] Among the units contained in the polysaccharide, at least one may be a modified monosaccharide unit. The modified monosaccharide unit means a unit into which a functional group not existing in the original unit is introduced by chemical treatment.

[0050] In one example, the functional group introduced into the modified monosaccharide unit can be represented by Formula 1 below.

[0051] [Formula 1]

[0052]

[0053] In Formula 1, M1 is hydrogen or a metal. In Formula 1, when M1 is a metal, the O-M1 bond is an ionic bond.

[0054] The functional group of Formula 1 may be introduced into the unit body by bonding the oxygen atom on the left side of the above Formula 1 to the skeleton of the unit body.

[0055] In the functional group of Formula 1, the carbon-carbon double bond may exist in the polymer in a state in which the relevant double bond remains, or may exist in the polymer in a state in which the double bond participates in cross-linking.

[0056] In Formula 1, M1 is hydrogen or a metal. The type of the metal is not particularly limited, and it may generally be an alkali metal such as lithium, sodium, potassium or cesium. Such a metal may exist in the form of a cation.

[0057] In the polymer, a functional group in which M1 in the above formula 1 is hydrogen and a functional group in which M1 is a metal may coexist.

[0058] The functional group can be introduced by reacting the polysaccharide with an unsaturated dicarboxylic acid or its anhydride and substituting the hydroxyl group present in the unit body of the polymer with the functional group. Examples of the dicarboxylic acid or its anhydride can be exemplified by maleic acid or maleic anhydride, but are not limited thereto, and salts of maleic acid can also be applied.

[0059] The substitution rate of the functional groups of Formula 1 in the polysaccharide may be within a predetermined range. The lower limit of the substitution rate may be about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%, and the upper limit thereof may be 300%, 295%, 290%, 285%, 280%, 275%, 270%, 265%, 260%, 255%, 250%, 245%, 240%, 235%, 230%, 225%, 235%, 240%, 250%, 265%, 270%, 27 ... %, 180%, 175%, 170%, 165%, 160%, 155%, 150%, 145%, 140%, 135%, 130%, 125%, 120%, 115%, 110%, 105%, 100%, 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, or 40%. The substitution rate can be in the range of greater than or equal to, or greater than any of the above lower limits; in the range of less than or equal to, or less than any of the above upper limits; or in the range of less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits. Within the range of the substitution rate, cross-linking of the polysaccharide component can be effectively performed, and physical properties (for example, absorption capacity and / or biodegradability, etc.) of the resulting polymer material can be stably ensured.

[0060] In the present specification, the substitution rate is a value indicating the degree to which the hydroxyl groups present in each unit body contained in the polysaccharide are replaced by a predetermined functional group (for example, the functional group of the above formula 1), and is the average value of the degree of substitution of each unit body present in the polysaccharide. For example, if the unit body is a grape sugar (glucose) unit, there are three hydroxyl groups in the unit before modification, and therefore, if all hydroxyl groups are replaced by the functional group of formula 1, the substitution rate of the relevant unit is 300%. However, the substitution rate of the polysaccharide is the average value of the degree of substitution of each unit present in the polysaccharide, so that, for example, when the substitution rates of each unit in a polysaccharide containing 5 grape sugar (glucose) units are 100%, 0%, 200%, 300% and 100%, the substitution rate of the polysaccharide is 140%, which is an average value. Such a substitution rate can be obtained by the polysaccharide. 1 H NMR analysis. That is, since the hydroxyl groups and substituted functional groups present in the polysaccharide can be 1 H NMR analysis can be used for quantification, so the substitution rate can be determined and, if necessary, the molecular weight of the polysaccharide before modification can be taken into account. 1The substitution rate was calculated from the results of H NMR analysis. 1 H NMR analysis is a method for quantifying functional groups.

[0061] In one example, the unit body including the functional group of Formula 1 may be a unit body represented by Formula 2 below.

[0062] [Formula 2]

[0063]

[0064] In Formula 2, R1 may be a hydroxyl group, an amino group, or an alkylcarbonylamino group. In Formula 2, L1 may be an alkylene group or an alkylidene group. In Formula 2, M1 may be hydrogen or a metal.

[0065] If M1 in Formula 2 is a metal, the O-M1 bond in Formula 2 may be an ionic bond.

[0066] The specific type of the metal of M1 in Formula 2 is as described in Formula 1.

[0067] In Formula 2, specific types of the alkyl group, alkylene group or alkylidene group are the same as defined at the beginning of this specification.

[0068] As described in Formula 1, the carbon-carbon double bond of the functional group in Formula 2 may exist in the polymer in a state where the double bond remains, or may exist in the polymer in a state where the double bond participates in cross-linking.

[0069] In the polymer, a functional group in which M1 in the above formula 2 is hydrogen and a functional group in which M1 is a metal may coexist.

[0070] In Formula 2, when R1 is a hydroxyl group, the unit body may generally be a case where it is derived from a so-called glucose unit body; when R1 is an amino group, the unit body may generally be a case where it is derived from a so-called glucosamine unit body; and when R1 is an alkylcarbonylamino group, the unit body may represent a case where it is derived from N-acetylglucosamine.

[0071] In one example, the functional group introduced into the modified monosaccharide unit may also be, for example, a functional group represented by the following Formula 3.

[0072] [Formula 3]

[0073]

[0074] In Formula 3, L2 may be an alkylene group or an alkylidene group. In Formula 3, M2 may be hydrogen or a metal. In Formula 3, when M2 is a metal, the O-M2 bond may be an ionic bond.

[0075] In Formula 3, specific types of the alkylene group or the alkylidene group are the same as defined at the beginning of this specification.

[0076] The functional group of Formula 3 may be introduced into the unit body when L2 on the left side in the above Formula 3 is bonded to the skeleton of the unit body.

[0077] In Formula 3, M2 is hydrogen or a metal. The type of the metal is not particularly limited, and it may generally be an alkali metal such as lithium, sodium, potassium or cesium.

[0078] In polysaccharides, functional groups in which M2 in the above formula 3 is hydrogen and functional groups in which M2 is a metal may also coexist.

[0079] The functional group can be introduced by reacting the polysaccharide with an acetic acid chloride such as chloroacetate and substituting the hydroxyl group present in the unit body of the polymer with the functional group.

[0080] The lower limit of the substitution rate of the functional group of formula 3 in the polysaccharide can be about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%, and the upper limit can be 300%, 295%, 290%, 285%, 280%, 275%, 270%, 265%, 260%, 255%, 250%, 245%, 240%, %, 235%, 230%, 225%, 220%, 215%, 210%, 205%, 200%, 195%, 190%, 185%, 180%, 175%, 170%, 165%, 160%, 155%, 150%, 145%, 140%, 135%, 130%, 125%, 120%, 115%, 110%, 105%, 100%, 95%, 90%, 85%, 80%, 75%, or 70%. The substitution rate can be in the range of greater than or equal to, or greater than any of the above lower limits; in the range of less than or equal to, or less than any of the above upper limits; or in the range of less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits. Within the range of the substitution rate, the cross-linking of the polysaccharide component can be effectively performed, and the physical properties of the resulting polymer material (e.g., absorption capacity and / or biodegradability, etc.) can be stably ensured. The definition of the substitution rate is the same as that of the functional group in Formula 1, and it can also be determined by the polysaccharide. 1 Determined by H NMR analysis.

[0081] In one example, the unit body including the functional group of the above Formula 3 may be a unit body represented by the following Formula 4.

[0082] [Formula 4]

[0083]

[0084] In Formula 4, R2 may be a hydroxyl group, an amino group, or an alkylcarbonylamino group, L2 and L3 may each independently be an alkylene group or an alkylidene group, and M2 may be hydrogen or a metal.

[0085] In Formula 4, when M2 is a metal, the O-M2 bond may be an ionic bond. The specific type of the metal of M2 in Formula 4 is as described in Formula 3.

[0086] In Formula 4, specific types of the alkyl group, alkylene group or alkylidene group are the same as defined at the beginning of this specification.

[0087] In polysaccharides, functional groups in which M2 in the above formula 4 is hydrogen and functional groups in which M2 is a metal may also coexist.

[0088] In the polysaccharide component contained in the polymer material, the functional group of the above formula 1 and the functional group of the above formula 3 may also exist simultaneously. For example, in a polysaccharide present in one molecule, the functional group of the above formula 1 and the functional group of the above formula 3 may exist simultaneously, or the polymer material may also contain a polysaccharide in which the functional group of the above formula 1 exists and a polysaccharide in which the functional group of the above formula 3 exists simultaneously.

[0089] Therefore, in the polysaccharide contained in the polymer material, the unit body of the above formula 2 and the unit body of the above formula 4 may also exist simultaneously. For example, in a polysaccharide present in one molecule, the unit body of the above formula 2 and the unit body of the above formula 4 may exist simultaneously, or the polysaccharide in which the unit body of the above formula 2 exists and the polysaccharide in which the unit body of the above formula 4 exists may also be simultaneously contained in the polymer material.

[0090] In one example, the polymer material may include a polysaccharide component, which includes a modified monosaccharide unit containing a functional group of Formula 1 above (e.g., a modified monosaccharide unit of Formula 2 above) and a modified monosaccharide unit containing a functional group of Formula 3 above (e.g., a modified monosaccharide unit of Formula 4 above).

[0091] In the case where the polysaccharide in one molecule as above contains both the modified monosaccharide unit body containing the functional group of formula 1 and the modified monosaccharide unit body containing the functional group of formula 3, the lower limit of the substitution rate of the functional group of the above formula 1 in the polysaccharide may be about 10%, 15%, 20%, 25%, 30%, or 35%, and the upper limit thereof may be 300%, 295%, 290%, 285%, 280%, 275%, 270%, 265%, 260%, 255%, 250%, 245%, 240%, 235%, 230%. %, 225%, 220%, 215%, 210%, 205%, 200%, 195%, 190%, 185%, 180%, 175%, 170%, 165%, 160%, 155%, 150%, 145%, 140%, 135%, 130%, 125%, 120%, 115%, 110%, 105%, 100%, 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, or 40%. The substitution rate can be in the range of greater than or equal to, or greater than any of the above lower limits; in the range of less than or equal to, or less than any of the above upper limits; or in the range of less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits. Within the range of the substitution ratio, cross-linking of the polysaccharide can be efficiently performed, and physical properties (for example, absorption capacity and / or biodegradability, etc.) of the resulting polymer material can be stably ensured.

[0092] In the case where one molecule of polysaccharide contains both a modified monosaccharide unit body containing a functional group of Formula 1 and a modified monosaccharide unit body containing a functional group of Formula 3, the lower limit of the substitution rate of the functional group of Formula 3 may be about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, or 65%, and the upper limit thereof may be 300%, 295%, 290%, 285%, 280%, 275%, 270%, 265%, 260%, 255%, 256%, 267%, 278%, 280%, 281%, 282%, 283%, 284%, 286%, 287%, 288%, 289%, 290%, 291%, 292%, 293%, 294%, 295%, 296%, 297%, 298%, 299%, 200%, 2010, 2020, 2030, 2040, 2050, 2060, 2070, 2080, 2090, 2110, 2120, 2130, 2140, 2150, 2160, 2170, 2180, 2190, 2211 %, 180%, 175%, 170%, 165%, 160%, 155%, 150%, 145%, 140%, 135%, 130%, 125%, 120%, 115%, 110%, 105%, 100%, 95%, 90%, 85%, 80%, 75%, or 70%. The substitution rate may be in the range of greater than or equal to, or greater than any of the above lower limits; in the range of less than or equal to, or less than any of the above upper limits; or in the range of less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits. Within the range of the substitution ratio, cross-linking of the polysaccharide can be efficiently performed, and physical properties (for example, absorption capacity and / or biodegradability, etc.) of the resulting polymer material can be stably ensured.

[0093] In another example, the polymer material may include a polysaccharide component, which includes: a first polysaccharide, which includes a modified monosaccharide unit containing a functional group of Formula 1 above (for example, a modified monosaccharide unit of Formula 2 above); and a second polysaccharide, which includes a modified monosaccharide unit containing a functional group of Formula 3 above (for example, a modified monosaccharide unit of Formula 4 above).

[0094] In this case, the lower limit of the substitution rate of the functional group of the above formula 1 in the first polysaccharide may be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95% or more, and the upper limit thereof may be 300%, 295%, 290%, 285%, 280%, 275%, 270%, 265%, 260%, %, 255%, 250%, 245%, 240%, 235%, 230%, 225%, 220%, 215%, 210%, 205%, 200%, 195%, 190%, 185%, 180%, 175%, 170%, 165%, 160%, 155%, 150%, 145%, 140%, 135%, 130%, 125%, 120%, 115%, 110%, 105%, or about 100%. The substitution rate can be in the range of greater than or equal to, or greater than any of the above lower limits; in the range of less than or equal to, or less than any of the above upper limits; or in the range of less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits. Within the range of the substitution ratio, cross-linking of the polysaccharide can be efficiently performed, and physical properties (for example, absorption capacity and / or biodegradability, etc.) of the resulting polymer material can be stably ensured.

[0095] In the above case, the lower limit of the substitution rate of the functional group of the above formula 3 in the second polysaccharide can be about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, 105%, 110%, 115%, or 120%, and the upper limit thereof can be 300%, 295%, 290%, 285%, 280%, 275%, 270%, %, 265%, 260%, 255%, 250%, 245%, 240%, 235%, 230%, 225%, 220%, 215%, 210%, 205%, 200%, 195%, 190%, 185%, 180%, 175%, 170%, 165%, 160%, 155%, 150%, 145%, 140%, 135%, 130%, 125%, 120%, 115%, 110%, 105%, or about 100%. The substitution rate can be in the range of greater than or equal to, or greater than any of the above lower limits; in the range of less than or equal to, or less than any of the above upper limits; or in the range of less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits. Within the range of the substitution ratio, cross-linking of the polysaccharide can be efficiently performed, and physical properties (for example, absorption capacity and / or biodegradability, etc.) of the resulting polymer material can be stably ensured.

[0096] In the above case, in the polysaccharide component, the upper limit of the weight ratio of the second polysaccharide relative to 100 parts by weight of the first polysaccharide may be 4000 parts by weight, 3800 parts by weight, 3600 parts by weight, 3400 parts by weight, 3200 parts by weight, 3000 parts by weight, 2800 parts by weight, 2600 parts by weight, 2400 parts by weight, 2200 parts by weight, 2000 parts by weight, 1800 parts by weight, 1600 parts by weight, 1400 parts by weight, 1 200 parts by weight, 1000 parts by weight, 950 parts by weight, 900 parts by weight, 850 parts by weight, 800 parts by weight, 750 parts by weight, 700 parts by weight, 650 parts by weight, 600 parts by weight, 550 parts by weight, 500 parts by weight, 450 parts by weight, 400 parts by weight, 350 parts by weight, 300 parts by weight, 250 parts by weight, 200 parts by weight, 150 parts by weight, 100 parts by weight, 90 parts by weight, 80 parts by weight, 70 parts by weight The lower limit of the present invention can be about 200 parts by weight, 2800 parts by weight, 2600 parts by weight, 2400 parts by weight, 2200 parts by weight, 2000 parts by weight, 1800 parts by weight, 1600 parts by weight, 1400 parts by weight, 1200 parts by weight, 1000 parts by weight, 950 parts by weight, 900 parts by weight, 850 parts by weight, 800 parts by weight, 750 parts by weight, 1000 parts by weight, 1500 parts by weight, 1600 parts by weight, 1700 parts by weight, 1800 parts by weight, 1900 parts by weight, 2000 parts by weight, 2100 parts by weight, 2200 parts by weight, 2000 parts by weight, 2500 parts by weight, 2600 parts by weight, 2400 parts by weight, 2200 parts by weight, 2000 parts by weight, 1800 parts by weight, 1600 parts by weight, 1400 parts by weight, 1200 parts by weight, 1000 parts by weight, 950 parts by weight, 900 parts by weight, 850 parts by weight, 800 parts by weight, 750 parts by weight, The weight ratio may be in the range of greater than or equal to or greater than any one of the above lower limits; in the range of less than or equal to or less than any one of the above upper limits; or in the range of less than or equal to or less than any one of the above upper limits and greater than or equal to or greater than any one of the above lower limits. Within the range of the ratio, crosslinking of polysaccharides can be effectively carried out, and the physical properties (e.g., absorption capacity and / or biodegradability, etc.) of the resulting polymer material can be stably ensured.

[0097] The polymer material or polymers such as polysaccharide components can have an appropriate level of molecular weight. For example, in one example, the weight average molecular weight (Mw) of the polymer material or polymer can be in the range of about 500 g / mol to 1,000,000 g / mol. Within such a range, when necessary, the polymer material can be given a desired sufficient degree of crosslinking, and the obtained polymer material can stably exhibit desired properties (biodegradability and absorption capacity, etc.).

[0098] In one example, the polysaccharide can be included in the polymer material in a cross-linked state. The cross-linking of such a polysaccharide can be achieved by double bonds present in the functional group (e.g., the functional group of Formula 1 above). The cross-linking of such a polysaccharide can be achieved by the double bonds of the polysaccharide itself, or can be achieved by applying a so-called cross-linking agent.

[0099] In this case, the type of crosslinking agent applicable is not particularly limited. For example, in the production of crosslinked polyacrylic acid generally used as SAP, a crosslinking agent used as a so-called internal crosslinking agent, a crosslinking agent used as an external crosslinking agent, or both can be used.

[0100] As such a crosslinking agent, polyethylene glycol diacrylate, N,N'-methylenebisacrylamide, trimethylolpropane tri(meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene glycol (meth)acrylate, propylene glycol di(meth)acrylate, polypropylene glycol (meth)acrylate, butanediol di(meth)acrylate, butanediol di(meth)acrylate, diethylene glycol di(meth)acrylate, hexanediol (meth)acrylate, triethylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, dipentaerythritol pentaacrylate, glycerol tri(meth)acrylate, pentaerythritol tetraacrylate, triarylamine, ethylene glycol diglycidyl ether, propylene glycol, glycerol and / or ethylene carbonate and the like are known, and in the present application, if necessary, an appropriate crosslinking agent can be selected from the known crosslinking agents and used.

[0101] When such a crosslinking agent is applied, the ratio is not particularly limited, and a suitable ratio may be selected in consideration of a desired degree of crosslinking. For example, such a crosslinking agent may not be used, or may be used in the following ratio.

[0102] In an example, polysaccharide can be included in the polymer material in a self-crosslinking state. In this specification, the term self-crosslinking means that the polysaccharide component is crosslinked without using a separate crosslinking agent or is crosslinked using a minimum crosslinking agent, which is related to the above-mentioned primary crosslinking. That is, the polysaccharide component after self-crosslinking can be further crosslinked. This further crosslinking can be, for example, the surface treatment of the so-called self-crosslinking polysaccharide component.

[0103] By crosslinking in this way, a polymer material having both excellent absorption capacity and biodegradability can be provided. In the case of a general polysaccharide component, it has a low crosslinking efficiency, so that effective crosslinking cannot be achieved even when a crosslinkable functional group is introduced, but in the case of the present application, by applying the specific polysaccharide component as described above, self-crosslinking can be effectively performed.

[0104] The amount of the crosslinking agent when the minimum crosslinking agent is used is not particularly limited as long as it is adjusted to a level that does not adversely affect biodegradability. For example, the upper limit of the ratio of the crosslinking agent relative to 100 parts by weight of the polysaccharide component may be about 10 parts by weight, 9 parts by weight, 8 parts by weight, 7 parts by weight, 6 parts by weight, 5 parts by weight, 4 parts by weight, 3 parts by weight, 2 parts by weight, 1 part by weight, 0.5 parts by weight, 0.1 parts by weight, 0.05 parts by weight, 0.01 parts by weight, 0.005 parts by weight, or 0.001 parts by weight, and the lower limit thereof may be about 0 parts by weight. The ratio of the crosslinking agent may be in the range of less than or equal to, or less than any of the above upper limits; or in the range of less than or equal to, or less than any of the above upper limits and greater than or equal to, or greater than any of the above lower limits.

[0105] The method for performing self-crosslinking is not particularly limited. Self-crosslinking can be performed, for example, in the presence of an oxidizing agent such as ammonium persulfate or other initiators.

[0106] In the crosslinking environment, crosslinking or polymerization of the functional group of Formula 1 present in the polysaccharide component, and crosslinking or polymerization or grafting of free radicals generated by oxidation of the oxidant and the functional group of Formula 1 may be performed to perform crosslinking.

[0107] The polymer material can be used in various applications by simultaneously exhibiting excellent absorbency and biodegradability.

[0108] For example, the polymer material can be used as a sanitary product such as a diaper or sanitary napkin, or an absorbent material for other applications requiring absorption. If necessary, the polymer material can also be further cross-linked, surface treated or physically ground to improve the efficiency of being used as a sanitary product or absorbent material.

[0109] Therefore, the present application relates to absorbent materials or hygiene products (such as diapers, sanitary napkins, etc.) comprising the polymer material.

[0110] A specific method of forming an absorbent material or a sanitary product by applying the polymer material is not particularly limited, and for example, a method of forming an absorbent material or a sanitary product by applying an existing SAP may be used in the same manner.

[0111] Beneficial Effects

[0112] The present application can provide a polymer material having excellent biodegradability and absorption capacity and uses thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0113] Figures 1 to 3 To show the polysaccharide prepared in the preparation example 1 Graph of the H NMR analysis results. DETAILED DESCRIPTION

[0114] Hereinafter, the present application will be described in detail through examples and comparative examples, but the scope of the present application is not limited to the following examples.

[0115] 1. Evaluation of Centrifuge Retention Capacity (CRC)

[0116] Centrifugal retention capacity (CRC) is measured according to EDANA (European Disposables and Nonwovens Association) WSP 241.3. About 0.2g (W0) sample (polymer material) is placed in a nonwoven bag, sealed, and then immersed in a physiological saline solution. As a physiological saline solution, a NaCl aqueous solution with a concentration of 0.9 % by weight is used. Keep the immersed state about 30 minutes, use a centrifuge to remove water from the bag under the condition of 250G for 3 minutes, and then measure the quality (g, W2) of the bag. The same operation is performed to the same nonwoven bag without sample, and quality (g, W1) is measured.

[0117] CRC(g / g) is calculated by substituting the measurement result into the following equation A.

[0118] The evaluation was performed under constant temperature and humidity conditions (23°C ± 1°C, relative humidity: 50% ± 10%).

[0119] [Equation A]

[0120] CRC(g / g)={[W2(g)-W1(g)] / W0(g)}-1

[0121] 2. Measurement of biodegradability

[0122] Biodegradability is measured in the manner specified in the KS M ISO 14851 standard. Biodegradability varies depending on the measurement method. For example, KS M ISO 14855-1 is a method for measuring biodegradability by carbon dioxide under composting conditions, wherein the level of biodegradability measured for the same material is higher than that of other measurement methods, but in a practical environment, it cannot well represent the biodegradability of the material. The KS M ISO 14851 standard is a method for measuring the aerobic biodegradability of polymeric materials in aqueous media (measuring the oxygen consumption of a closed breathing system), wherein the biodegradability of the method well reflects the biodegradability characteristics of the material in a practical environment. The method for measuring biodegradability according to the KS M ISO14851 standard is known.

[0123] Preparation Example 1

[0124] A polysaccharide (modified starch) (Compound A) comprising a modified monosaccharide unit of the following formula A was prepared in the following manner. The modified monosaccharide unit of the following formula A is a monosaccharide unit into which a maleic acid group (wherein M1 in Formula 1 is a substituent of a hydrogen atom) is introduced.

[0125] [Formula A]

[0126]

[0127] 20g starch and 50mL water are added to 500mL RBF (Round Bottom Flask), stirred at room temperature (about 25°C), and then 50mL 2.0M NaOH solution is added thereto. As starch, potato starch is used. The mixture is further stirred for 2 hours to gelatinize it, about 100g maleic anhydride is added thereto, and reacted at 65°C for about 5 hours. After the reaction is completed, the temperature is lowered to room temperature (about 25°C), and acetone is added to generate a precipitate. The precipitate is recovered and dried in a vacuum drying oven at 40°C for one day to obtain a solid target product (Compound A). The substitution rate of the target product (Compound A) obtained can be measured by 1 HNMR analysis was performed. 1 H NMR analysis was performed at room temperature (about 25°C). 1 HNMR spectroscopy was performed, 1 The H NMR spectrometer consisted of a Varian Unity Inova (500 MHz) spectrometer with a triple resonance 5 mm probe. 1 In the H NMR analysis, Bruker's Avance Neo instrument was used. 50 mg of the obtained target product (Compound A) was mixed with 200 mg of a 30% DCl solution in D2O, and stirred at 50°C for about 1 hour to cause a hydrolysis reaction, and then the reaction was allowed to proceed. 1 H NMR analysis. The substitution rate of maleic acid groups on starch was determined by 1 Confirmed by H NMR analysis. Figure 1 The above compound A is shown 1 The results of H NMR analysis showed that the substitution ratio was about 98%.

[0128] Preparation Example 2

[0129] Starch (compound B) containing a modified monosaccharide unit of the following formula B was prepared in the following manner. The modified monosaccharide unit of the following formula B is a monosaccharide unit into which a functional group derived from sodium acetate (a substituent, wherein M2 in Formula 3 is sodium and L2 is a methylene group) is introduced.

[0130] [Formula B]

[0131]

[0132] 20g starch and 50mL water are added in 500mL RBF (round-bottomed flask), stir under room temperature (about 25 ℃), then add 50mL2.0M NaOH solution wherein.As starch, use the same starch as in Preparation Example 1.Mixture was further stirred 2 hours to make its gelatinization, add about 100g sodium monochloroacetate wherein, and reacted about 5 hours at 65 ℃.After reaction is completed, temperature is reduced to room temperature (about 25 ℃), and acetone is added to generate precipitate.Precipitate is reclaimed, and in vacuum drying oven, dry one day at 40 ℃ to obtain solid target product (Compound B).

[0133] The target product (Compound B) was subjected to the same reaction as in Preparation Example 1. 1 The results of H NMR analysis are shown in Figure 2 In. By Figure 2 The results in the literature determined that the substitution rate was about 120%.

[0134] Preparation Example 3

[0135] The starch (compound C) containing the modified monosaccharide units represented by formula A and formula B of both Preparation Example 1 and Preparation Example 2 was prepared in the following manner. 20g of starch and 50mL of water were added to a 500mL RBF (round bottom flask), stirred at room temperature (about 25°C), and then 50mL of 2.0M NaOH solution was added thereto. As starch, the same type as in Preparation Example 1 was used. The mixture was further stirred for 2 hours to gelatinize it, and about 14g of sodium monochloroacetate and about 10g of maleic anhydride were added thereto, and reacted at 65°C for about 5 hours. After the reaction was completed, the temperature was lowered to room temperature (about 25°C), and acetone was added to generate a precipitate. The precipitate was recovered and dried in a vacuum drying oven at 40°C for one day to obtain a solid target product (compound C). The target product (compound C) was subjected to the same method as in Preparation Example 1. 1 The results of H NMR analysis are shown in Figure 3 In. By Figure 3 The analysis results in the above determined that the substitution rate of the maleic acid group of the target product (Compound C) was about 37%, and the substitution rate of the functional group derived from sodium acetate was about 68%.

[0136] Example 1

[0137] 50mL distilled water, 2.5g of the compound (Compound A) of Preparation Example 1 and 0.5g of the compound (Compound B) of Preparation Example 2 were introduced into a 250mL RBF (round bottom flask), and the mixture was stirred in an oil bath at 35°C for 30 minutes or longer, so that Compound A and Compound B were fully dissolved in distilled water. Then, an initiator was introduced therein. As an initiator, about 0.03g of ammonium persulfate was introduced. After the initiator was introduced, the mixture was further stirred for about 4 hours at a temperature of about 70°C to carry out the crosslinking between Compound A and Compound B. After crosslinking, ethanol was introduced to precipitate the polymer material comprising the crosslinked polymer, and then dried overnight at 40°C in a vacuum drying oven after filtration to obtain the target polymer material.

[0138] Examples 2 to 4 and Comparative Examples 1 and 2

[0139] A polymer was prepared in the same manner as in Example 1, except that the amount of the compound introduced for polymerization was changed as in the following Table 1. In the following table, the unit of the content is g.

[0140] [Table 1]

[0141]

[0142] Comparative Example 3

[0143] 50 mL of distilled water, 2.5 g of the compound of Preparation Example 1 (Compound A), 0.5 g of the compound of Preparation Example 2 (Compound B), 6.8 mg of polyethylene glycol diacrylate (number average molecular weight: 575 g / mol), 0.24 mg of bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide and 3.6 mg of sodium persulfate were introduced into a 250 mL RBF (round bottom flask), and the mixture was stirred in an oil bath at 35° C. for 30 minutes or more, thereby fully dissolving Compound A and Compound B in distilled water. The mixture was irradiated with ultraviolet rays for 60 seconds (irradiation dose: 10 mV / cm 2 ), and then kept for about 2 minutes for cross-linking. After cross-linking, ethanol was introduced to precipitate a polymer material including a cross-linked polymer, and then after filtration, it was dried overnight in a vacuum drying oven at 40° C. to obtain a target polymer material.

[0144] The CRC and biodegradability measured for the polymers of Examples and Comparative Examples are summarized and described in Table 2 below.

[0145] [Table 2]

[0146]

[0147] As shown in the results of Table 2, the polymer materials according to the embodiments of the present application simultaneously exhibit excellent absorption characteristics and biodegradability. Comparative Example 1 is a case where only compound A is applied, and in this case, biodegradability is ensured to a certain extent, but the absorption characteristics are greatly reduced. Comparative Example 2 is a case where only compound B is applied, and both absorption capacity and biodegradability are reduced. Comparative Example 3 is a case where the same material as that of Example 1 is used but a method using an acrylate-based crosslinking agent is applied instead of a self-crosslinking method, and in this case, absorption capacity is ensured, but biodegradability is greatly reduced.

Claims

1. A polymer material comprising a polysaccharide component, wherein A centrifuge retention capacity of 13 g / g or greater according to EDANA method WSP 241.3, and The biodegradability according to KS M ISO 14851 standard is 70% or more. 2 . The polymer material according to claim 1 , wherein the polysaccharide component comprises a polysaccharide having modified monosaccharide units.

3. The polymer material according to claim 2, wherein the modified monosaccharide unit comprises a functional group of the following formula 1: [Formula 1] in, M 1 is hydrogen or a metal, and when M 1 When it is metal, OM 1 The bond is an ionic bond, and the carbon-carbon double bond in the above formula can form a cross-linked structure. 4 . The polymer material according to claim 3 , wherein the substitution rate of the functional group of Formula 1 in the polysaccharide is in the range of 10% to 300%.

5. The polymer material according to claim 2, wherein the modified monosaccharide unit is represented by the following formula 2: [Formula 2] in, R 1 is hydroxyl, amino, or alkylcarbonylamino, L 1 is an alkylene group or an alkylidene group, M 1 is hydrogen or a metal, and when M 1 When it is metal, OM 1 The bond is an ionic bond, and the carbon-carbon double bond in the above formula can react to form a cross-linked structure.

6. The polymer material according to claim 2, wherein the modified monosaccharide unit comprises a functional group of the following formula 3: [Formula 3] in, L 2 is an alkylene group or an alkylidene group, and M 2 is hydrogen or a metal, and when M 2 When it is metal, OM 2 The bond is an ionic bond. 7 . The polymer material according to claim 6 , wherein the substitution rate of the functional group of Formula 3 in the polysaccharide is in the range of 10% to 300%.

8. The polymer material according to claim 2, wherein the modified monosaccharide unit is represented by the following formula 4: [Formula 4] in, R 2 is hydroxyl, amino, or alkylcarbonylamino, L 2 and L 3 Each is independently an alkylene group or an alkylidene group, M 2 is hydrogen or a metal, and when M 2 When it is metal, OM 2 The bond is an ionic bond.

9. The polymer material according to claim 1, wherein the polysaccharide component comprises a polysaccharide comprising a modified monosaccharide unit having a functional group of the following formula 1 and a modified monosaccharide unit having a functional group of the following formula 3: [Formula 1] [Formula 3] in, M in Formula 1 1 is hydrogen or a metal, and when M 1 When it is metal, OM 1 The bond is an ionic bond, and the carbon-carbon double bond in the above formula can react to form a cross-linked structure, and L in Formula 3 2 is an alkylene group or an alkylidene group, and M 2 is hydrogen or a metal, and when M 2 When it is metal, OM 2 The bond is an ionic bond.

10. The polymer material according to claim 9, wherein the substitution rate of the functional group of Formula 1 in the polysaccharide is in the range of 10% to 300%, and the substitution rate of the functional group of Formula 3 is in the range of 10% to 300%.

11. The polymer material according to claim 1, wherein the polysaccharide component comprises a first polysaccharide comprising a modified monosaccharide unit having a functional group of the following formula 1; and a second polysaccharide comprising a modified monosaccharide unit having a functional group of the following formula 3: [Formula 1] [Formula 3] in, M in Formula 1 1 is hydrogen or a metal, and when M 1 When it is metal, OM 1 The bond is an ionic bond, and the carbon-carbon double bond in the above formula can react to form a cross-linked structure, and L in Formula 3 2 is an alkylene group or an alkylidene group, and M 2 is hydrogen or a metal, and when M 2 When it is metal, OM 2 The bond is an ionic bond.

12. The polymer material according to claim 11, wherein the substitution rate of the functional group of Formula 1 in the first polysaccharide is in the range of 10% to 300%, and the substitution rate of the functional group of Formula 3 in the second polysaccharide is in the range of 10% to 300%. 13 . The polymer material according to claim 11 , comprising 10 to 4000 parts by weight of the second polysaccharide relative to 100 parts by weight of the first polysaccharide. The polymer material according to claim 1 , wherein the polysaccharide is included in a cross-linked state.

15. The polymer material according to claim 1, wherein the polysaccharide is included in a self-crosslinked state. 16 . The polymer material according to claim 1 , comprising no cross-linking agent, or comprising 10 parts by weight or less of a cross-linking agent relative to 100 parts by weight of the polysaccharide component.

17. An absorbent material comprising the polymer material according to any one of claims 1 to 16.

18. A hygiene article comprising the polymer material according to any one of claims 1 to 16.

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