摘要:
The present invention relates to water-swellable, hydrophilic polymer compositions which can be prepared by free-radical (co)polymerization of one or more hydrophilic monomers in the presence of starch and/or chemically modified starch, wherein a free-radical initiator which forms three or more free radical sites per molecule is used.
摘要:
The present invention relates to hydrophilic, highly swellable hydrogels which are coated with non-reactive, water-insoluble film-forming polymers.
摘要:
The present application relates to a process for the preparation of porous, hydrophilic, highly swellable hydrogels, which comprises freeze-drying hydrophilic, highly swellable hydrogels which have been swollen with water.
摘要:
The present invention relates to the use of surfactants for improving the drying properties of hydrophilic, highly swellable hydrogels in the course of drying with the aid of contact dryers.
摘要:
The present invention relates to novel hydrophilic swellable addition polymers comprising improved odor control, a process for their preparation and their use for absorbing aqueous fluids and a process for screening superabsorbents.
摘要:
The present invention relates to novel hydrophilic swellable addition polymers comprising improved odor control, a process for their preparation and their use for absorbing aqueous fluids and a process for screening superabsorbents.
摘要:
The present invention relates to novel hydrophilic swellable addition polymers comprising improved odor control, a process for their preparation and their use for absorbing aqueous fluids and a process for screening superabsorbents.
摘要:
The invention relates to hydrogels capable of absorbing aqueous fluids, which hydrogels are produced by polymerization of olefinically unsaturated carboxylic acids or their derivatives. The hydrogels are characterized in that before, during or after the polymerization reaction and before drying a silicic acid alkali salt of the general formula (I) M2O×nSiO2 is added to the polymerization reaction mixture. In said formula M is an alkali metal and n is a number between 0.5 and 4. The hydrogel obtained in this way is then dried at an elevated temperature. The invention also relates to a method for producing said hydrogels and to their use for absorbing aqueous fluids.
摘要翻译:本发明涉及能够吸收含水流体的水凝胶,该水凝胶是通过烯属不饱和羧酸或其衍生物的聚合制备的。 水凝胶的特征在于,在聚合反应之前,之中或之后,在干燥之前,将通式(I)的M 2 O x nSiO 2的硅酸碱金属盐加入到聚合反应混合物中。 在所述式中,M是碱金属,n是0.5-4之间的数。然后在升高的温度下将这样得到的水凝胶干燥。 本发明还涉及一种生产所述水凝胶的方法及其用于吸收含水流体的用途。
摘要:
Hydrogel-forming polymers which have: (i) a Saline Flow Conductivity of at least 40×10−7 cm3s/g; (ii) an AUL 0.7 psi (4826.5 Pa) of at least 20 g/g; and (iii) a Frangibility Index of at least 60%, are useful in hygienic articles such as incontinence briefs for adults and diapers for infants.
摘要翻译:具有以下特征的水凝胶形成聚合物:(i)至少40×10 -7 cm 3 / g的盐水流动电导率;(ii)至少20g / g的AUL 0.7psi(4826.5Pa); 和(iii)至少60%的易碎指数,可用于卫生用品,如成人尿失禁者和婴儿尿布。
摘要:
Water-swellable hydrophilic polymers are prepared by neutralization of the acidic hydrogel having a degree of neutralization of 0-40 mol % to an ultimate degree of neutralization of 60-85 mol % by mixing with a neutralizing agent in a mincer comprising a system of screw, rotating blade, restricted flow zone and breaker plate, wherein the mincer has a power output of from 1000 to 6000 Wh/m3 the hydrogel passes through a zone having-an energy dissipation density of from 400 to 800 W/1 of mixing volume the average residence time of the hydrogel in the mincer is from 5 to 30 seconds the breaker plate has an open area of from 20 to 40%.