Non-stringy adhesive hydrophilic gels
First Claim
1. A non-stringy adhesive hydrophilic gel comprising a homogeneous mixture of water and at least one water-soluble polymer present at a concentration of at least about 7 percent by weight of said mixture, said water-soluble polymer having a weight average molecular weight of at least about 200 kD, which mixture had been exposed to a dose of radiant energy effective to provide a non-stringy hydrophilic gel which exhibits a sharp, substantially featureless force-displacement profile, has an Adhesion Energy Density (AED) of at least about 5 to less than about 50 g/cm and has a peak-force value of at least about 180 grams.
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Accused Products
Abstract
The non-stringy hydrogels of this invention are comprised of a homogeneous uniform mixture of water and at least one water-soluble high molecular weight polymer. Suitable mixtures may be derived from poly(ethylene oxide) and water or poly(vinyl pyrrolidone), a viscosity-enhancing hydrophilic polymer and water, and further, may optionally contain an effective amount of a water-soluble electrolyte to provide conductive non-stringy materials. These polymeric mixtures which are crosslinked by exposure to radiant energy provide gel-like solids which are sufficiently tacky and adhesive to adhere to the subjects'"'"' skin and yet are substantially non-stringy and non-aggressive such that contact with such hydrogels imparts less discomfort to the user. In addition, the consumer utilizing the products of this invention would not experience the objectionable sticky, stringy sensation associated with existing conductive adhesive gels.
159 Citations
51 Claims
- 1. A non-stringy adhesive hydrophilic gel comprising a homogeneous mixture of water and at least one water-soluble polymer present at a concentration of at least about 7 percent by weight of said mixture, said water-soluble polymer having a weight average molecular weight of at least about 200 kD, which mixture had been exposed to a dose of radiant energy effective to provide a non-stringy hydrophilic gel which exhibits a sharp, substantially featureless force-displacement profile, has an Adhesion Energy Density (AED) of at least about 5 to less than about 50 g/cm and has a peak-force value of at least about 180 grams.
- 26. A non-stringy adhesive hydrophilic gel comprising a homogeneous mixture of water and poly(ethylene oxide) (PEO) present at a concentration of at least about 7 percent by weight to less than about 35 percent by weight of said mixture, said PEO having a weight average molecular weight of about 500 kD to about 5,000 kD,
which mixture had been exposed to a dose of radiant energy, relative to the amount of said PEO present, within the area of the radiation dose versus PEO concentration curve whose upper and lower boundaries are defined substantially by the relationships NS(C) and A(C), respectively, - space="preserve" listing-type="equation">Upper Dose, NS(C)=2.039+0.1598C-8.183/C
space="preserve" listing-type="equation">Lower Dose, A(C)=1.245+0.0373C-3.908/Cin which C is the concentration of said PEO expressed as a weight fraction of said mixture, which dose is effective to provide a non-stringy hydrophilic gel which exhibits a sharp substantially featureless force-displacement profile, has an AED value of at least about 5 to less than about 50 g/cm and has a peak-force value of at least about 180 grams. - View Dependent Claims (31)
- 27. A non-stringy adhesive hydrophilic gel comprising a homogenous mixture of water, poly(vinyl pyrrolidone) (PVP) and a viscosity-enhancing hydrophilic polymer having a weight average molecular weight in excess of about 100 kD, said PVP having a weight average molecular weight of about 500 kD to about 2,000 kD and present at a concentration of at least about 6 percent to less than about 35 percent by weight of said mixture,
which mixture had been exposed to a dose of radiant energy, relative to the amount of said PVP present, within the area of the radiation dose versus PVP concentration curve whose upper and lower boundaries are defined substantially by the relationships NS(C) and A(C), respectively, - space="preserve" listing-type="equation">Upper Dose, NS(C)=1.122+0.099C-2.705/C
space="preserve" listing-type="equation">Lower Dose, A(C)=0.471+0.0256C-1.394/Cin which C is the concentration of said PVP expressed as a weight fraction of said mixture, which dose is effective to provide a non-stringy hydrophilic gel which exhibits a sharp substantially featureless force-displacement profile, has an AED value of at least about 5 to less than about 50 g/cm and has a peak-force value of at least about 180 grams. - View Dependent Claims (33)
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34. A dressing comprising a non-stringy adhesive hydrophilic gel, which gel comprises a homogeneous mixture of (i) water, (ii) at least one water-soluble polymer present at a concentration of at least about 7 percent by weight of said mixture and having a weight average molecular weight of at least about 200 kD, and (iii) at least one additive present at a concentration of about 0.001 percent to about 6 percent by weight of said mixture,
which mixture had been exposed to a dose of radiant energy effective to provide a non-stringy hydrophilic gel which exhibits a sharp substantially featureless force-displacement profile, has an AED value of at least about 5 to less than about 50 gm/cm and has a peak-force value of at least about 180 grams.
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45. An electrode comprising (a) a conductive non-stringy adhesive hydrophilic gel, which gel comprises a homogeneous mixture of (i) water, (ii) at least one water-soluble polymer present at a concentration of at least about 7 percent by weight of said mixture and having a weight average molecular weight of at least about 200 kD, and (iii) an amount of a water-soluble electrolyte effective to reduce the transverse electrical resistance of said gel to an impedance at 60 Hz of less than about 1,000 ohms,
which mixture had been exposed to a dose of radiant energy effective to provide a non-stringy hydrophilic gel which exhibits a sharp substantially featureless force-displacement profile, has an AED value of at least about 5 to less than about 50 gm/cm and has a peak-force value of at least about 180 grams; - and (b) a suitable conductive member, in intimate contact with said gel, to which may be connected external electrical apparatus.
- View Dependent Claims (46, 47, 48, 49, 50, 51)
Specification