Pressure sensitive conductive adhesive having hot-melt properties and biomedical electrodes using same

A pressure-sensitive adhesive, adhesive technology, applied in the direction of acid copolymer adhesives, polyether adhesives, adhesive types, etc., can solve problems such as difficult drying steps, achieve less residual monomers, The effect of high application speed and reduced manufacturing cost

Inactive Publication Date: 2003-03-12
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are generally slow and include difficult drying steps due to the thickness of the electrode material

Method used

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  • Pressure sensitive conductive adhesive having hot-melt properties and biomedical electrodes using same
  • Pressure sensitive conductive adhesive having hot-melt properties and biomedical electrodes using same
  • Pressure sensitive conductive adhesive having hot-melt properties and biomedical electrodes using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0172] Two solutions were prepared, the aqueous solutions containing:

[0173] 7.7gKCl;

[0174] 84.3g deionized water;

[0175] 51g glycerin;

[0176] 70.2 g acrylic acid (AA); and

[0177] 11.2 g β-carboxyethyl acrylate (CEA);

[0178] The non-aqueous solution contains:

[0179] 31.7 g isooctyl acrylate (IOA);

[0180] 0.215gCBr 4 ,and

[0181] 0.429 g VAZ064 Thermal Initiator (DuPont, Wilmington, DE).

[0182] The two solutions were mixed in a bottle, and then the bottle was placed in a 60° C. laundrometry for 24 hours. The polymer was then mixed with 0.68 g of PEI in a Brabender mixer at 60-75°C for about 40 minutes. The final percent water is calculated by weighing a piece of sample, followed by heating at 90°C, and weighing the sample again. The final composition within the sample is shown in Table 1.

Embodiment 2-5

[0184] Additional samples of several similar examples with variations were prepared. However, when mixed with PEI in a Brabender mixer, surfactants, Brij TM 97 The amount of surfactant (polyoxyethylene (10) oleyl ether, available from ICI) was varied. The mixing condition in the mixer was still 60-75°C for about 40 minutes. The samples appeared to be colloidal structural adhesives. The final compositions of Examples 2-5 are shown in Table 1 below.

Embodiment 6

[0186] In Example 6, a solution was prepared containing:

[0187] 53 g IOA;

[0188] 76.1gAA;

[0189] 3gβCEA;

[0190] 0.2 g isooctyl thioglycolate (IOTG);

[0191] 0.195 g Irg184;

[0192] 20g glycerin; and

[0193] 48g PEG400.

[0194] The solution appeared as a clear single phase. About 18 g of the above solution was added to a bag made of ethylene-vinyl acetate copolymer containing about 6% vinyl acetate. Ten bags containing the same solution were placed in a 16°C water bath. With an intensity of 3.5mWatt / cm 2 The polymerization was carried out under ultraviolet light; the dwell time under the light was 10 minutes.

[0195] After polymerization, the bags were either opaque or transparent depending on the percentage of glycerol / PEG400. Next, the bags were mixed in a Brabender mixer with a solution consisting of 15% w / w Brij 97, 2.35% PEI and 2% KCl in water at 95-65°C for about 1.5 hours. Again it was shown that a polymer colloid structured adhesive was formed. ...

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Abstract

A skin-compatible, hot-melt processible, pressure sensitive adhesive is disclosed. A thermo-reversible cross-linking is achieved, permitting advantages in processibility and the reduction of waste.

Description

field of invention [0001] The present invention relates to an electrically conductive pressure sensitive adhesive having hot melt properties (or which can be hot melt processed) suitable for use as an ionically conductive pressure sensitive adhesive for biomedical electrodes. background of the invention [0002] Biomedical electrodes are used in diagnosis and therapy, including ECG monitoring and diagnosis, electrosurgery, iontophoresis (electrical enhancement) transdermal delivery, and defibrillation. In their most basic form, these electrodes have a conductive medium that contacts the mammalian skin and an electrical connection that interacts between the conductive medium and the electrodiagnostic, therapeutic or electrosurgical device. [0003] The conductive medium used in these electrodes is usually an ionically conductive binder or gel. The conductive adhesive composition for bonding biomedical electrodes to the skin and forming an electrical connection between the sk...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K9/70A61B5/0408A61F13/02A61L15/44C08L71/02C08L79/02C09J129/10C09J133/02C09J133/08C09J133/24C09J139/00C09J139/02C09J139/08C09J171/02C09J179/02C09J201/00
CPCC08L71/02A61B5/04087C09J133/02C09J2201/606C08L79/02Y10T428/1462C08L2666/02C09J2301/302A61B5/259
Inventor 王丹黎P·A·斯塔克A·I·埃弗拉尔茨
Owner 3M INNOVATIVE PROPERTIES CO
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