Powdered grafted cellulose
AssigneePersonal Products Company
InventorsPronoy K. Chatterjee, Graham K. Morbey
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Abstract
A selected powdery form of a graft copolymer containing hydrophilic chains provides a highly moisture-absorbent media which is suitable for use in absorbent bodies, particularly those used for absorbing body exudates such as catamenial devices, diapers, wound dressings, surgical sponges, incontinence pads and the like. The powdered form of said copolymers is useful alone or in combination with other absorbent materials in making up the absorbent bodies.
Claims13
An absorbent body comprising cellulose particles having grafted thereon hydrophilic chains of the general formula:
- ##STR4## wherein R.sup.1 and R.sup.2 are selected from the group consisting of hydrogen and alkyl having 1 to 4 carbon atoms, X and Y are selected from the group consisting of --OH, --O(alkali metal), and --NH.sub.2, wherein m is an integer having a value of 0 to about 5000, n is an integer having a value of 0 to about 5000, the sum of all m and n groups is at least 500, p is an integer having a value of 0 to 1, and q is an integer having a value of 1 to 4;
- the individual particles of said grafted cellulose having an arithmetic average size of about 70 to about 500 microns;
- said grafted cellulose comprising from about 5 to about 50% by weight based on the weight of the absorbent body.
A catamenial device comprising an absorbent body of cellulose fibers and cellulose particles having grafted thereon hydrophilic chains of the general formula:
- ##STR5## where R.sup.1 and R.sup.2 are selected from the group consisting of hydrogen and alkyl having 1 to 4 carbon atoms, X and Y are selected from the group consisting of --OH, --O(alkali metal), and --NH.sub.2, wherein m is an integer having a value of 0 to about 5000, n is an integer having a value of 0 to about 5000, the sum of all m and n groups is at least 500, p is an integer having a value of zero to 1, and q is an integer having a value of 1 to 4;
- the individual particles of said grafted cellulose having an arithmetic average size of about 70 to about 500 microns;
- said grafted cellulose comprising from about 5 to about 50% by weight based on the weight of the absorbent body.
Dependencies are inferred from the claim text.