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US 2003/0158473 A1Published application
Bioadhesive compositions and biomedical electrodes containing them
AssigneeFirst Water Limited
InventorsHugh Semple Munro, Mohammed Yasin
Life of this patent
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Abstract
Bioadhesive Compositions which comprise a hydrophobic polymer wherein the concentration of the polymer at the surface of the adhesive is greater than its concentration in the bulk of the adhesive are described; and biomedical electrodes, fixation products and wound dressings containing them.
Claims22
A bioadhesive composition comprising:
- (a) an aqueous plasticiser, and
- (b) a copolymer of:
- a first hydrophilic unsaturated water-soluble monomer, which has the formula
- 4
- wherein R1 is an optionally substituted hydrocarbon moiety, R2 is hydrogen or an optionally substituted methyl or ethyl group, and M is hydrogen or a cation, and
- a second hydrophilic unsaturated water-soluble monomer, which has the formula
- 5
- wherein R5 is hydrogen or an optionally substituted methyl or ethyl group, R6 is hydrogen or a cation and R7 is an optionally substituted alkylene moiety of 1 to 4 carbon atoms, and
- a cross-linking agent;
- the composition having:
- (i) a water activity in the range of 0.4 to 0.9;
- (ii) an elastic modulus at 1 rad/s in the range of 700 to 15,000 Pa;
- (iii) an elastic modulus at 100 rad/s in the range of 2000 to 40,000 Pa;
- (iv) a viscous modulus at 1 rad/s in the range of 400 to 14,000 Pa;
- (v) a viscous modulus at 100 rad/s in the range of 1000 to 35,000 Pa;
- wherein the viscous modulus is less than the elastic modulus in a frequency range of 1 to 100 rad/s.
13 more elements
Dependencies are inferred from the claim text.