Composition For Preparing A Polymeric Foam
US-2015376361-A1 · Dec 31, 2015 · US
Water-absorbing polymer particles with high free swell rate and high permeability
US9738769B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9738769-B2 |
| Application number | US-201313763029-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 8, 2013 |
| Priority date | Feb 15, 2012 |
| Publication date | Aug 22, 2017 |
| Grant date | Aug 22, 2017 |
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Abstract
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A process for producing water-absorbing polymer particles with high free swell rate and high permeability by polymerization of an aqueous monomer solution or suspension to give an aqueous polymer gel, wherein a thermal blowing agent essentially free of inorganic acid anions is mixed into the polymer gel, and subsequent thermal drying of the polymer gel.
First claim
Opening claim text (preview).
The invention claimed is: 1. Water-absorbing polymer particles having a centrifuge retention capacity (CRC), a free swell rate (FSR), and a permeability (SFC) which meet the conditions FSR (g/gs)≧0.01·CRC (g/g)−0.08 and SFC (10 −7 ·cm 3 s/g)≧11000·exp(−0.18·CRC(g/g)). 2. Water-absorbing polymer particles according to claim 1 , wherein the water-absorbing polymer particles have a centrifuge retention capacity (CRC) of at least 26 g/g. 3. Water-absorbing particles according to claim 2 , wherein the water-absorbing polymer particles have a free swell rate (FSR) of at least 0.2 g/gs. 4. Water-absorbing particles according to claim 2 , wherein the water-absorbing polymer particles have a permeability (SFC) of at least 80×10 −7 cm 3 s/g. 5. Water-absorbing particles according to claim 3 , wherein the water-absorbing polymer particles have a permeability (SFC) of at least 80×10 −7 cm 3 s/g. 6. Water-absorbing polymer particles according to claim 1 , wherein the water-absorbing polymer particles have a free swell rate (FSR) of at least 0.2 g/gs. 7. Water-absorbing polymer particles according to claim 1 , wherein the water-absorbing polymer particles have a permeability (SFC) of at least 80×10 −7 cm 3 s/g. 8. A hygiene article comprising water-absorbing polymer particles according to claim 1 .
Assignees
Inventors
Classifications
organic · CPC title
Making expandable particles · CPC title
of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen · CPC title
Homopolymers or copolymers of acrylic acid esters · CPC title
- C08J9/06Primary
by a chemical blowing agent · CPC title
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- What does patent US9738769B2 cover?
- A process for producing water-absorbing polymer particles with high free swell rate and high permeability by polymerization of an aqueous monomer solution or suspension to give an aqueous polymer gel, wherein a thermal blowing agent essentially free of inorganic acid anions is mixed into the polymer gel, and subsequent thermal drying of the polymer gel.
- Who is the assignee on this patent?
- Basf Se
- What technology area does this patent fall under?
- Primary CPC classification C08J9/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 22 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).