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US 9,850,379 B2Granted
Gels and hydrogels
OwnerNaihong Li, Michael C. Williamsinventors
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Abstract
Gels and gel-containing materials, including hydrogels, are described. A gel can be formed by blending polyacrylic acid (PAA) and a polyglycol, such as polytetramethylene ether glycol (PTMEG) at room temperature and, in some cases, without using a catalyst. The blend material can be used to form soft or hard materials, films and particles. The blend material can be combined with vinyl monomers and polymerize to form a hydrogel. The hydrogel can have a high mechanical strength and high water absorbency.
Claims33
A hydrogel comprising:
- a first polymeric material having polyacrylic acid;
- a second polymeric material comprising polytetramethylene ether glycol;
- and
- one or more species having a vinyl functionality.
1 more element
A gel, comprising:
- a first polymeric material having polyacrylic acid;
- and
- a second polymeric material comprising polytetramethylene ether glycol, wherein the first polymeric material is hydrogen-bonded to the second polymeric material.
A three-dimensional gel formed from:
- a first polymeric material comprising polyacrylic acid;
- and
- a second polymeric material comprising a polyglycol having —O(CH2)n− units,
- where n is a number greater than or equal to 3,
- wherein the first polymeric material is hydrogen-bonded to the second polymeric material.
2 more elements
Dependencies are inferred from the claim text.