초록 ▼

The present invention relates to a water-absorbing particulate composition comprising water-absorbing polymer particulate structure comprising partly neutralized, crosslinked polyacrylate, a surface crosslinking agent and a compound of the structure I in which R1, R2, R3 and R4 can be identical or

The present invention relates to a water-absorbing particulate composition comprising water-absorbing polymer particulate structure comprising partly neutralized, crosslinked polyacrylate, a surface crosslinking agent and a compound of the structure I in which R1, R2, R3 and R4 can be identical or different and in each case represent a hydrogen atom, a halogen atom, a C1- to C4-hydrocarbon group or a hydroxyl group, R5 represents a hydrogen atom, a C1- to C4-hydrocarbon group or an acetyl group, n represents an integer chosen from the group consisting of 1, 2 or 3 and Mn+ represents an n-valent metal cation or an H+ cation. In addition, the present invention also relates to a process for the preparation of a water-absorbing composition, the water-absorbing composition obtainable by this process, a composite, a process for the production of a composite, the composite obtainable by this process, and products, such as hygiene articles.

대표청구항 ▼

1. A water-absorbing particulate composition comprising (a) water-absorbing polymer particulate structure wherein the water-absorbing polymer comprises partly neutralized, crosslinked sodium polyacrylate comprising from 0.01 to 2.5 wt % of one or more crosslinking agents based on the weight of the w

1. A water-absorbing particulate composition comprising (a) water-absorbing polymer particulate structure wherein the water-absorbing polymer comprises partly neutralized, crosslinked sodium polyacrylate comprising from 0.01 to 2.5 wt % of one or more crosslinking agents based on the weight of the water-absorbent polymer wherein the sodium polyacrylate is neutralized to from 50 to 60 mol %, (b) a surface crosslinking agent wherein the water-absorbing polymer particulate structures have an inner region and an outer region surrounding the inner region, the outer region having a higher degree of crosslinking than the inner region due to the surface crosslinking agent, (c) 1 wt % of zinc salicylate in the form of a powder and (d) a binder to attach and immobilize the zinc salicylate to the surface of the water-absorbing particulate composition wherein the binder is selected from thermoplastic hot melt adhesives, hydrophilic water-soluble polymer or water, and wherein the water-absorbing particulate composition have an average particle size according to ERT-420.2.02 of from 150 μm to 600 μm and the water-absorbing particulate composition comprises at least 75 wt % of the particles, based on the total weight of the water-absorbing particulate composition, have a particle size in the range of 300 to 600 μm and wherein the water-absorbing particulate composition has (β1) a retention determined according to ERT 441.2-02 of from 25 g/g to 50 g/g; and (β2) an absorption (determined for the entire particle size fraction in the case of particles) against a pressure of 0.7 psi (50 g/cm2) to ERT 442.2-02 of at least 15 g/g; wherein the water-absorbing particulate composition has an odor-binding effect of delay of release of ammonia of at least 17 hours and a surface tension of at least 60 mN/m. 2. The water-absorbing composition according to claim 1, wherein the internal crosslinking agent is selected from N,N′-methylenebisacrylamide, polyethylene glycol di(meth)acrylates, triallylmethylammonium chloride, tetraallylammonium chloride, allylnonaethylene glycol acrylate prepared with 9 mol of ethylene oxide per mol of acrylic acid, polyethylene glycol 300 diacrylate or allyloxypolyethylene glycol acrylate. 3. The water-absorbing composition according to claim 2, wherein the internal crosslinking agent is selected from polyethylene glycol 300 diacrylate or allyloxypolyethylene glycol acrylate. 4. The water-absorbing composition according to claim 2, wherein the post-crosslinking agent is selected from diethylene glycol, triethylene glycol, polyethylene glycol, glycerol, polyglycerol, propylene glycol, diethanolamine, triethanolamine, polyoxypropylene, oxyethylene-oxypropylene block copolymers, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, trimethylolpropane, pentaerythritol, polyvinyl alcohol, sorbitol, 1,3-dioxolan-2-one (ethylene carbonate), 4-methyl-1,3-dioxolan-2-one (propylene carbonate), 4,5-dimethyl-1,3-dioxolan-2-one, 4,4-dimethyl-1,3-dioxolan-2-one, 4-ethyl-1,3-dioxolan-2-one, 4-hydroxymethyl-1,3-dioxolan-2-one, 1,3-dioxan-2-one, 4-methyl-1,3-dioxan-2-one, 4,6-dimethyl-1,3-dioxan-2-one and 1,3-dioxolan-2-one. 5. The water-absorbing composition according to claim 1, wherein the zinc salicylate is contacted with the water-absorbing polymer structures in an amount within a range from about 0.1 to about 5% by weight, based on the total weight of the water-absorbing polymer structures. 6. The water-absorbing composition according to claim 1, wherein the post-crosslinking agent is selected from 1,3-dioxolan-2-one. 7. A composite comprising a water-absorbing composition according to claim 1, and a substrate. 8. A liquid-absorbing hygiene article comprising the water-absorbing composition according to claim 1. 9. A water-absorbing composition particulate obtainable by a process comprising the process steps of: i) providing a water-absorbing polymer particulate structure comprising partly neutralized crosslinked sodium polyacrylate comprising from 0.01 to 2.5 wt % of one or more crosslinking agents based on the weight of the water-absorbent polymer wherein the internal crosslinking agent is selected from N,N′-methylenebisacrylamide, polyethylene glycol di(meth)acrylates, triallylmethylammonium chloride, tetraallylammonium chloride, allylnonaethylene glycol acrylate prepared with 9 mol of ethylene oxide per mol of acrylic acid, polyethylene glycol 300 diacrylate or allyloxypolyethylene glycol acrylate and wherein the sodium polyacrylate is neutralized to from 50 to 60 mol %;ii) postcrosslinking the water-absorbing polymer structure with a surface crosslinking agent wherein the water-absorbing polymer structures have an inner region and an outer region surrounding the inner region, the outer region having a higher degree of crosslinking than the inner region due to the surface crosslinking agent;iii) contacting the surface crosslinked water-absorbing polymer structure of step ii) with a binder and 1 wt % of zinc salicylate in the form of a powder wherein the binder attaches and immobilize the zinc salicylate to the surface of the water-absorbing particulate composition wherein the binder is selected from thermoplastic hot melt adhesives, hydrophilic water-soluble polymer or water, and wherein process step iii) can be performed before, during or after process step ii) wherein the water-absorbing particulate composition have an average particle size according to ERT-420.2.02 of from 150 μm to 600 μm and the water-absorbing particulate composition comprises at least 75 wt % of the particles, based on the total weight of the water-absorbing particulate composition, have a particle size in the range of 300 to 600 μm and wherein the water-absorbing particulate composition has (β1) a retention determined to ERT 441.2-02 of from 25 g/g to 50 g/g; and (β2) an absorption (determined for the entire particle size fraction in the case of particles) against a pressure of 0.7 psi (50 g/cm2) to ERT 442.2-02 of at least 15 g/g; wherein the water-absorbing particulate composition has an odor-binding effect of delay of release of ammonia of at least 17 hours and a surface tension of at least 60 mN/m. 10. A process for producing a water-absorbing particulate composition, comprising the process steps of: i) providing a water-absorbing polymer particulate structure wherein the water-absorbing polymer comprises partly neutralized, crosslinked sodium polyacrylate comprising from 0.01 to 2.5 wt % of one or more crosslinking agents based on the weight of the water-absorbent polymer wherein the sodium polyacrylate is neutralized to from 50 to 60 mol %;ii) postcrosslinking the water-absorbing polymer particulate structure with a surface crosslinking agent wherein the water-absorbing polymer structures have an inner region and an outer region surrounding the inner region, the outer region having a higher degree of crosslinking than the inner region due to the surface crosslinking agent;iii) contacting the water-absorbing polymer particulate structure with a binder and 1 wt % of zinc salicylate in the form of a powder wherein the binder attaches and immobilize the zinc salicylate to the surface of the water-absorbing particulate composition wherein the binder is selected from thermoplastic hot melt adhesives, hydrophilic water-soluble polymer or water, and wherein process step iii) can be performed before, during or after process step ii) wherein the water-absorbing particulate composition have an average particle size according to ERT-420.2.02 of from 150 μm to 600 μm and the water-absorbing particulate composition comprises at least 75 wt % of the particles, based on the total weight of the water-absorbing particulate composition, have a particle size in the range of 300 to 600 μm and wherein the water-absorbing particulate composition has (β1) a retention determined to ERT 441.2-02 of from 25 g/g to 50 g/g; and (β2) an absorption (determined for the entire particle size fraction in the case of particles) against a pressure of 0.7 psi (50 g/cm2) to ERT 442.2-02 of at least 15 g/g; wherein the water-absorbing particulate composition has an odor-binding effect of delay of release of ammonia of at least 17 hours and a surface tension of at least 60 mN/m. 11. The process according to claim 10, wherein the internal crosslinking agent is selected from N,N′-methylenebisacrylamide, polyethylene glycol di(meth)acrylates, triallylmethylammonium chloride, tetraallylammonium chloride, allylnonaethylene glycol acrylate prepared with 9 mol of ethylene oxide per mol of acrylic acid, polyethylene glycol 300 diacrylate or allyloxypolyethylene glycol acrylate. 12. The process according to claim 10, wherein the internal crosslinking agent is selected from polyethylene glycol 300 diacrylate or allyloxypolyethylene glycol acrylate. 13. The process according to claim 10, wherein the-post-crosslinking agent is selected from diethylene glycol, triethylene glycol, polyethylene glycol, glycerol, polyglycerol, propylene glycol, diethanolamine, triethanolamine, polyoxypropylene, oxyethylene-oxypropylene block copolymers, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, trimethylolpropane, pentaerythritol, polyvinyl alcohol, sorbitol, 1,3-dioxolan-2-one (ethylene carbonate), 4-methyl-1,3-dioxolan-2-one (propylene carbonate), 4,5-dimethyl-1,3-dioxolan-2-one, 4,4-dimethyl-1,3-dioxolan-2-one, 4-ethyl-1,3-dioxolan-2-one, 4-hydroxymethyl-1,3-dioxolan-2-one, 1,3-dioxan-2-one, 4-methyl-1,3-dioxan-2-one, 4,6-dimethyl-1,3-dioxan-2-one and 1,3-dioxolan-2-one.