초록

A mixed polymer network made from reacting a carboxyalkyl cellulose and a synthetic water-soluble polymer with a crosslinking agent.

대표청구항 ▼

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. A composition, obtained by reacting a carboxyalkyl cellulose, a carboxyalkyl lignin and a synthetic water-soluble polymer with a crosslinking agent, wherein the water-soluble polymer c

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. A composition, obtained by reacting a carboxyalkyl cellulose, a carboxyalkyl lignin and a synthetic water-soluble polymer with a crosslinking agent, wherein the water-soluble polymer comprises a polymer having carboxylic acid or carboxylic acid derivative substituents, wherein the crosslinking agent reacts with at least one of the carboxyalkyl cellulose or water-soluble polymer. 2. The composition of claim 1, wherein the ratio of carboxyalkyl cellulose to water-soluble polymer is from about 50:50 to about 95:5 weight/weight. 3. The composition of claim 1, wherein the carboxyalkyl cellulose is selected from the group consisting of carboxymethyl cellulose and carboxyethyl cellulose. 4. The composition of claim 1, wherein the carboxyalkyl cellulose is derived from an unbleached or lightly bleached cellulose. 5. The composition of claim 4, wherein the unbleached or lightly bleached cellulose has a kappa value of from about 1 to about 65. 6. The composition of claim 1, wherein the water-soluble polymer having carboxylic acid substituents is selected from the group consisting of a polyacrylic acid, a polymaleic acid, a polyaspartic acid, a copolymer of acrylic acid and acrylamide, a copolymer of acrylic acid and maleic acid, a copolymer of maleic acid and itaconic acid, and mixtures thereof. 7. The composition of claim 1, wherein the polymer having carboxylic acid derivative substituents is a polyacrylamide. 8. The composition of claim 1, wherein the crosslinking agent is selected from the group consisting of a diol, a diamine, an aminol, and mixtures thereof. 9. The composition of claim 1, wherein the crosslinking agent is selected from the group consisting of an aldehyde, a dialdehyde, a dialdehyde sodium bisulfite addition product, a dihalide, a diene, a diepoxide, a haloepoxide, a dicarboxylic acid, a polycarboxylic acid, a polyoxazoline functionalized polymer, a polyvalent cation, a polycationic polymer, and mixtures thereof. 10. The composition of claim 1, wherein the water-soluble polymer is selected from the group consisting of polyacrylic acid, polyacrylamide, and mixtures thereof. 11. The composition of claim 1 having a Free Swell Capacity of at least about 45 g/g. 12. The composition of claim 1 having a Centrifuge Capacity of at least about 10 g/g. 13. The composition of claim 1 having an Absorbency Under Load value of at least about 20 g/g. 14. A composition obtained by a method comprising: (a) treating a carboxyalkyl cellulose, a carboxyalkyl lignin and a synthetic water-soluble polymer with a crosslinking agent to provide a reaction mixture, wherein the crosslinking agent reacts with at least one of the carboxyalkyl cellulose or water-soluble polymer and wherein the water-soluble polymer comprises a polymer having carboxylic acid or carboxylic acid derivative substituents; and (b) crosslinking the reaction mixture to provide the composition. 15. The composition of claim 14, wherein the ratio of carboxyalkyl cellulose to water-soluble polymer is from about 50:50 to about 95:5 weight/weight. 16. The composition of claim 14, wherein the carboxyalkyl cellulose is selected from the group consisting of carboxymethyl cellulose and carboxyethyl cellulose. 17. The composition of claim 14, wherein the synthetic water-soluble polymer is selected from the group consisting of a polyacrylamide, a polyacrylic acid, a polymaleic acid, a polyaspartic acid, a copolymer of acrylic acid and acrylamide, a copolymer of acrylic acid and maleic acid, a copolymer of maleic acid and itaconic acid, and mixtures thereof. 18. The composition of claim 14, wherein the crosslinking agent is selected from the group consisting of a diol, a diamine, an aminol, an aldehyde, a dialdehyde, a dialdehyde sodium bisulfite addition product, a dihalide, a diene, a diepoxide, a haloepoxide, a dicarboxylic acid, a polycarboxylic acid, a polyoxazoline functionalized polymer, a polyvalent cation, a polycationic polymer, and mixtures thereof. 19. A composition, obtained by the reaction of a carboxyalkyl cellulose, a carboxyalkyl lignin and a synthetic water-soluble polymer having carboxylic acid or carboxylic acid derivative substituents with two crosslinking agents, wherein each crosslinking agent reacts with at least one of the carboxyalkyl cellulose or water-soluble polymer.