congratulatepampers and tampons hydrogelspity, that

KRB1 en. IV Ex. This particular combination of characteristics renders these hydrogel-forming polymers, when neutralized to a particular extent, especially useful as absorbents in absorbent structures and articles. Water-absorbing polymers having interstitial compounds, a process for their production, and their use. Year of fee payment : 4. The amount of hydrogel-forming polymer particles used in the absorbent structures herein can be most conveniently expressed in terms of a weight percentage of the absorbent structure. This method yields a rubbery continuous gel which is dried and ground to the desired particle size. Radiat Phys Chem — Cosmetics Development, manufacture and use of cosmetic materials, Kap. If glass beakers are used, they must be acid washed prior to use. Olefinically unsaturated carboxylic acid and carboxylic acid anhydride monomers include the acrylic acids typified by acrylic acid itself, methacrylic acid, ethacrylic acid, alpha-chloracrylic acid, alpha-cyano acrylic acid, beta-methyl-acrylic acid crotonic acid , alpha-phenyl acrylic acid, beta-acryloxy propionic acid, sorbic acid, alpha-chloro sorbic acid, angelic acid, cinnamic acid, p-chloro cinnamic acid, beta-styryl acrylic acid 1-carboxyphenyl butadiene-1,3 , itaconic acid, citraconic acid, mesaconic acid, glutaconic acid, aconitic acid, maleic acid, fumaric acid, tricarboxy ethylene and maleic acid anhydride.

This test is initiated by placing a 3 cm. Int J Pharm 1—2 — Eur J Pharm Biopharm 76 3 — This powder forms a hydrogel having a shear modulus of 4. The matrix may also be formed from a mixture of wood pulp fluff and the meltblown fibers discussed above. US Patent Since this time period, many synthetic SAPs have been made which are directly descended from these early materials.

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Coated water-swellable material comprising hydrogel-forming polymeric core and polymeric coating agent. One embodiment of a disposable diaper article according to the present invention is shown in the drawing. The water and contents of the funnel were separately purged with argon through submerged gas dispersion tubes for 1 hour at 25° C. It is preferred that these starch or cellulose materials be pretreated by heating in order to swell or gelatinize them. Water-absorbent resin composition, method of manufacturing the same, and absorbent article. Particle Size Distr. Polymer moieties such as polysaccharides, e. Absorbent article having improved absorption and retention capacity for proteinaceous or serous body fluids. Year of fee payment : For sulfonic acid-based hydrogel-forming polymers, a gravimetric procedure is employed. In the first place, the hydrogel-forming polymer compositions herein must have an initial extractable polymer content, i. To obtain larger quantities, the above quantities were scaled-up proportionately. As early as , carboxylic ion-exchange resins were known which swelled up to fold in sodium bicarbonate, as described in British patent , to Bayer.

Cellulose-Based Hydrogel for Personal Hygiene Applications | SpringerLink

• The time elapsing between the first fluid contact with the sample and the time when fluid disappears into the sample is measured with a stop watch.
• This hydrogel mass is usually formed from an agglomeration of swollen hydrogel particles which have unswollen particle dimensions less than microns.
• Again a DAT is utilized, as in Figure 12, except that the end of a 3" x
• Process of making absorbent structures and absorbent strutures produced thereby.
• Microbiol Rev 55 1 —

Year of fee payment : 4. Year of fee payment : 8. Year of fee payment : Effective date : The present invention relates to improved hydrogel-forming polymer compositions which can be used as absorbents in absorbent structures and absorbent articles such as diapers, sanitary napkins and the like. Such hydrogel-forming polymer compositions are substantially water-insoluble, slightly cross-linked, partially neutralized polymers which are prepared from unsaturated polymerizable, acid group-containing monomers and cross-linking agents. These hydrogel-forming polymer materials, upon imbibing fluids, form hydrogels. Such polymer materials have relatively high gel volume and relatively high gel strength as measured by shear modulus of the hydrogen which forms therefrom. Such polymer materials also contain relatively low levels of extractable polymer material which can be extracted therefrom by contact with synthetic urine. Preferred hydrogel-forming polymers having these characteristics can be prepared by polymerizing the acid group-containing monomers in their free acid form at relatively low monomer concentrations, preferably using relatively low polymerization temperatures. Absorbent structures and absorbent articles containing these dried hydrogel-forming polymer materials are also disclosed. This application is a reissue of Ser. This invention relates to improved hydrogel-forming polymer compositions and to a process for their preparation. Such hydrogel-forming polymers are those which, upon contacting fluids i. These hydrogel-forming polymer materials are useful as absorbents in absorbent structures which can be incorporated into absorbent articles such as disposable diapers, adult incontinence pads, sanitary napkins and the like. Water-insoluble hydrogel-forming polymers are materials which are capable of absorbing large quantities of fluids such as water and body waste and which are further capable of retaining such absorbed fluids under moderate pressures.

Personal hygiene product is an inseparable part of urban pampers and tampons hydrogels. It has given comfort, reliability, and flexibility to sick people, women, and children. The hygiene items containing superabsorbent polymer hydrogels for absorbing large amount of body fluids are the attractive inventions of modern science. The hydrogels swell and imbibe body fluids in the presence of hydrophilic functional groups in the polymeric backbone. Current trend of using acrylate-based superabsorbent in hygiene products is creating significant portion of urban garbage.

Pampers and tampons hydrogels. Cellulose-Based Hydrogel for Personal Hygiene Applications

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The same polymerization vessel as in Example XVI was charged with ml hexanes and 3. High performance super-absorbent material and absorbent devices containing the same.