Polymer materials

Patent metadata

Field	Value
Publication number	US-2023172496-A1
Application number	US-202217947603-A
Country	US
Kind code	A1
Filing date	Sep 19, 2022
Priority date	Jan 14, 2016
Publication date	Jun 8, 2023
Grant date	—

Abstract

Polyurethane material for indicating pH at a locus, preferably as indication of presence of microbes, comprising a polyurethane network having immobilised therein one or more hydrophilic copolymers, the or each said copolymer comprising:hydrophilic monomer; andindicating monomer, which provides an indication in response to a change in hydrophilic state of said hydrophilic monomer and/or copolymer;characterised in that the or each copolymer further comprises one or a plurality of ionisable groups or moieties or polymerisable monomers having one or more characteristic pKa values in the range 5 to 10 and which are responsive to pH at the locus in the range pH 5 to pH 10and in that hydrophilic state of hydrophilic copolymer is dependent on ionisation of said ionisable groups, moieties or monomers; kit and device comprising the material and process for preparation thereof; and use in detecting or sensing microbes or pH.

First claim

1 . Polyurethane material for indicating pH at a locus in the range pH 5 to pH 10, preferably as indication of presence of microbes, comprising a polyurethane network having immobilised therein one or more hydrophilic copolymers, the or each said copolymer comprising:
hydrophilic monomer; and one or a plurality of ionisable groups or moieties having one or more characteristic pKa values in the range 2 to 12; wherein hydrophilic state of hydrophilic copolymer is affected by ionisation of said ionisable groups or moieties; and wherein the or each said copolymer further comprises indicating monomer which provides indication of hydrophilic state of said hydrophilic copolymer.

2 - 24 . (canceled)

Assignees

• Smith & Nephew
• Univ Sheffield

Inventors

• Hicks John Kenneth
• Hoskins Richard
• Rimmer Stephen
• Mcculloch Dorothy

Classifications

• C08L2203/02

  for biomedical use · CPC title

• C08J9/0061

  characterized by the use of several polymeric components · CPC title

• C08G18/73

  acyclic · CPC title

• A61L15/42

  Use of materials characterised by their function or physical properties (liquid bandages A61L26/00) · CPC title

• A61F2013/00089

  Wound bandages (A61F2013/00361 takes precedence;) · CPC title