摘要:
A superabsorbent polymer comprising a delayed absorption superabsorbent polymer having a free water absorbency property of absorbing less than about 3 grams of aqueous saline per gram of superabsorbent polymer in about 6 seconds, for a full particle size distribution of superabsorbent polymer ranging from about 40 micrometers to about 890 micrometers.
摘要:
A web of superabsorbent polymer and fiber made by an in situ neutralization, wet-laid process, wherein the degree of neutralization of the superabsorbent polymer is partial, preferably less than about 80 mol %. The web exhibits an excellent centrifuge retention capacity property, as compared to prior webs of superabsorbent polymer and cellulosic fiber made by in situ neutralization, wherein the degree of neutralization is total, such as 100 mol % or more.
摘要:
A process for producing an absorbing polymer structure (Pa) including the steps of obtaining a treated absorbing polymer structure (Pb) by increasing the absorption under load at a load of 0.3 or 0.9 psi (AUL) compared to an untreated absorbing polymer structure (Pu) by a first treatment of an outer region of the untreated absorbing polymer structure (Pu) and reducing the AUL compared to the treated polymer structure (Pb) by a second treatment of an outer region of the treated absorbing polymer structure (Pb). Such absorbing polymer structure (Pa) may be used in a composite and may be used in foams, moulded articles, fibers, sheets, films, cables, sealing materials, liquid-absorbing hygiene articles, carriers for plant growth-regulating and fungal growth-regulating agents, packaging materials and soil additives or building materials.
摘要:
The present invention relates to superabsorbent cross-linked polymers for watery liquids, which are built-up of partially neutralized monomers having monoethylenlcally unsaturated acid groups, optionally further monomers copolymerizable therewith, as well as polymers optionally suitable as graft basis, and which can be manufactured by using a cross-linker/monomer combination of CH.sub.2 .dbd.CHR.sup.6 --CO--(OCHR.sup.3 --CHR.sup.3).sub.z O--CH.sub.2 --CHR.sup.6 .dbd.CH.sub.2 CH.sub.2 .dbd.CHR.sup.6 --R.sup.5 --(OCHR.sup.3 --CHR.sup.3).sub.v OR.sup.4R.sup.1 --�O(CHR.sup.3 --CHR.sup.3 O).sub.u --CO--R.sup.2 !.sub.x, and/or di- or triallylamine and/or bisacrylamide with R.sup.1 : multivalent C2-10-alkyl, R.sup.2 : linear or branched C2-10-alkenyl, R.sup.3 : H, CH.sub.3, C.sub.2 H.sub.5, R.sup.4 : H, linear or branched C1-10-alkyl, R.sup.6 : CO, CH.sub.2 R.sup.8 : H, CH.sub.3 x: 2-6 u: 0-15 V: 1-45 z: 3-20 As compared with the state of the art, the polymers according to the present invention have an improved combination of the properties retention, liquid absorption under pressure at 63 g/cm.sup.2 and soluble contents, moreover, they have an Increased permeability of the gel layer for watery liquids, a high suction rate, and a high swelling pressure. The polymers are used as absorbents for water and watery liquids in constructions for the absorption of body fluids, In electricity or light-conducting cables, and in plant raising.
摘要:
The invention relates to aqueous dispersions of water soluble polymers, formed by polymerization of a mixture A of various monomer components (a1, a2, and possibly a3) in the presence of a polymeric dispersant D; wherewith the mixture A is comprised of the following different monomera1 (in the amount of 99-70 wt. %), comprised of at least one water soluble monomer,a2 (in the amount of 1-30 wt. %), comprised of at least one hydrophobic monomer, and (possibly)a3 (in the amount of 0-20 wt. %), comprised of at least one amphipathic monomer, wherewith in each instance the sum of the amounts of a1, a2, and a3 is 100%;and wherewith the water soluble polymers have a mean molecular weight M.sub.w (gravimetric mean) of at least 10.sup.6 Dalton.
摘要:
A process for producing an absorbing polymer structure (Pa) including the steps of obtaining a treated absorbing polymer structure (Pb) by increasing the absorption under load at a load of 0.3 or 0.9 psi (AUL) compared to an untreated absorbing polymer structure (Pu) by a first treatment of an outer region of the untreated absorbing polymer structure (Pu) and reducing the AUL compared to the treated polymer structure (Pb) by a second treatment of an outer region of the treated absorbing polymer structure (Pb). Such absorbing polymer structure (Pa) may be used in a composite and may be used in foams, moulded articles, fibers, sheets, films, cables, sealing materials, liquid-absorbing hygiene articles, carriers for plant growth-regulating and fungal growth-regulating agents, packaging materials and soil additives or building materials.
摘要:
A process for producing an absorbing polymer structure (Pa) including the steps of obtaining a treated absorbing polymer structure (Pb) by increasing the absorption under load at a load of 0.3 or 0.9 psi (AUL) compared to an untreated absorbing polymer structure (Pu) by a first treatment of an outer region of the untreated absorbing polymer structure (Pu) and reducing the AUL compared to the treated polymer structure (Pb) by a second treatment of an outer region of the treated absorbing polymer structure (Pb). Such absorbing polymer structure (Pa) may be used in a composite and may be used in foams, moulded articles, fibers, sheets, films, cables, sealing materials, liquid-absorbing hygiene articles, carriers for plant growth-regulating and fungal growth-regulating agents, packaging materials and soil additives or building materials.
摘要:
An aqueous, low-viscosity, water-soluble polymeric dispersion containing a polymer (A) is prepared by copolymerizing monomers:(a1) 99 to 70 weight % of at least one water-soluble monomer,(a2) 1 to 30 weight % of at least one hydrophobic monomer and,(a3) 0 to 20 weight % of at least one amphiphilic monomer, which monomers constitute 100 weight % of the polymers forming material which polymer (A) has an average molecular weight M.sub.W (mean weight) of at least 5.times.10.sup.5 Dalton, said process comprising:a first step i) of reacting said monomer ingredients in an aqueous dispersion in the presence of at least one polymeric dispersing agent (D) thereby preparing a dispersion of polymer (A); and a second step ii) of adding at least one polymeric dispersion agent (D), in an aqueous solution, to the dispersion.
摘要:
The present invention relates to a particulate superabsorbent polymer composition which absorbs water, aqueous liquids, and blood, and a process to make the superabsorbent polymers, wherein a superabsorbent polymer is surface treated with a neutralized multivalent metal salt solution having a pH value similar as that of human skin. The present invention also relates to particulate superabsorbent polymer composition having high Gel Bed Permeability and high Absorbency Under Load.
摘要:
The present invention relates to a particulate superabsorbent polymer composition which absorbs water, aqueous liquids, and blood, and a process to make the superabsorbent polymers, wherein a superabsorbent polymer is surface treated with a neutralized multivalent metal salt solution having a pH value similar as that of human skin. The present invention also relates to particulate superabsorbent polymer composition having high Gel Bed Permeability and high Absorbency Under Load.