摘要:
The present invention provides a composition for a medical material or a hygiene material, which contains a large amount of an organic liquid component, has sufficient flexibility and can retain shape. The present invention provides a gel composition for a medical material or a hygiene material, which contains a liquid rubber component having a functional group capable of crosslinking reaction in a molecule and 90 parts by weight or above and 1250 parts by weight or below of an organic liquid component relative to 100 parts by weight of the rubber component, which gel composition is crosslinked.
摘要:
The present invention provides a medical adhesive and a medical adhesive tape or sheet superior in the fixing performance, particularly perspiration-resistant fixing, which shows low skin irritation and suitable adhesive strength. The present invention provides a medical adhesive containing a water-dispersed copolymer obtained by copolymerizing 100 parts by weight of a monomer mixture containing (meth)acrylic acid alkyl ester and 0.005-2 parts by weight of a silane monomer copolymerizable with the ester, and an organic liquid component compatible with the copolymer; a medical adhesive containing a water-dispersed copolymer obtained by copolymerizing a monomer mixture containing (meth)acrylic acid alkyl ester and a silane monomer copolymerizable with the ester, and an organic liquid component compatible with the copolymer, wherein the gel fraction after crosslinking of the copolymer is 40-80 wt %, and the weight average molecular weight of a sol component after crosslinking is not less than 300000; and a medical adhesive tape or sheet having the medical adhesive at least on one surface of a support.
摘要:
Mixed-metal-oxide (MMO) coated precious-metal tape is installed directly on concrete surfaces using an electrically conductive adhesive, thereby obviating the need for slots, holes, cementitious grout or additional concrete. The electrically conductive adhesive is preferably formed by disposing mixed-metal-oxide (MMO) coated precious-metal particles in an adhesive layer. The tape anodes may be installed on the concrete surfaces including a shallow concrete cover or congested reinforcing steel without developing an electrical short circuit between the anode and the reinforcing steel. Overall the invention provides for quick and low cost installation on many concrete structures. Interconnections between the tape anodes and bare metal distribution elements may be made with conductive adhesive or spot welding.
摘要:
An anode configured for the cathodic protection of reinforced concrete structures and underground metallic structures against corrosion comprises a hollow, mixed-metal-oxide (MMO) coated form, the form having a wall with intentional gaps therethrough. A humectant is disposed in the hollow form, and a conduit between the hollow form and an ambient environment enables gasses produced by the form to escape to the environment while allowing the humectant to be periodically moistened with water or a high pH buffer solution. The form may be composed of titanium, tantalum, zirconium, niobium or alloys thereof, and the MMO coatings may be composed of titanium, tantalum, iridium, ruthenium, palladium, cobalt or mixtures thereof. The form may be a coiled wire or strip, a perforated tube, or other structure having gaps between the interior of the form and the surrounding concrete or soil.
摘要:
A corrosion control system for an above-ground storage tank having a steel bottom plate comprises a sacrificial anode disposed under and spaced apart from the steel bottom plate in a backfill material, and wherein the backfill material has a pH high enough to cause a substantial passivation of the surface of the steel plate facing the sacrificial anode while substantially preventing the passivation of the sacrificial anode. In the preferred embodiment the backfill material has a pH of 10 or greater and the sacrificial anode is in the form of a plate or mesh composed of aluminum or an alloy thereof. Alternatively the sacrificial anode may be composed of zinc or an alloy thereof. The backfill material further includes soda ash, trisodium phosphate or other high alkaline chemicals to raise the pH. The backfill material also preferably includes a moisture retention material such as zeolite to maintain a minimum of moisture content of 10 percent or greater.
摘要:
Mixed-metal-oxide (MMO) coated precious-metal tape is installed directly on concrete surfaces using an electrically conductive adhesive, thereby obviating the need for slots, holes, cementitious grout or additional concrete. The electrically conductive adhesive is preferably formed by disposing mixed-metal-oxide (MMO) coated precious-metal particles in an adhesive layer. The tape anodes may be installed on the concrete surfaces including a shallow concrete cover or congested reinforcing steel without developing an electrical short circuit between the anode and the reinforcing steel. Overall the invention provides for quick and low cost installation on many concrete structures. Interconnections between the tape anodes and bare metal distribution elements may be made with conductive adhesive or spot welding.
摘要:
Systems and methods are disclosed for detecting the presence of water on or in pipelines, tanks, equipment and other structures, including insulated structures which may be subject to corrosion under insulation, or CUI. Two dissimilar, spaced-apart metals are coupled at least indirectly to a structure to be monitored, and apparatus for detecting a potential difference between the two dissimilar metals, thereby indicating that water is present as an electrolyte. In CUI applications, at least one of the dissimilar metals is attached to, or embedded within, a water-absorbing insulator or other material coupled to or surrounding the structure. The water-absorbing material may be provided in the form of a tape attached to the surface of a metal component fanning the structure. In some embodiments, the structure to be monitored may itself incorporate a ferrous metal component which is used as one of the dissimilar metals.
摘要:
Provided is a patch having good adhesion property, which stably maintains the quality for a long time.A patch containing a support and an adhesive layer formed on at least one surface of the support, wherein the adhesive layer contains an elastomer having a structure of the formula I: wherein P1 and P2 are each independently hydrogen, a hydroxy group or an organic group.
摘要:
The present invention aims to provide a patch and a patch preparation that do not require an acrylic polymer, and are capable of maintaining a large amount of an organic liquid component in an adhesive layer.The present invention provides a patch containing a support and an adhesive layer provided on at least one surface of the support, wherein the adhesive layer contains a synthetic rubber component other than polyisobutylene and solid at 25° C., a liquid rubber component having a crosslinkable functional group in a molecule, and an organic liquid component, the adhesive layer is crosslinked, and the liquid rubber component is contained in a proportion of less than 30 wt % relative to the total weight of the synthetic rubber component solid at 25° C. and the liquid rubber component.
摘要:
This invention resides in corrosion control of electrical cables associated with cathodic protection systems. In the preferred embodiment the cable is in the form of passive metals chosen for electrolysis-corrosion-resistance, including titanium, tantalum, niobium, zirconium, nickel, or alloys thereof. Small diameters may be used to make the cable flexible. The wires may be bare or enclosed insulator materials for easy handling. The invention which is applicable to the “impressed current” and “sacrificial anode” methods, is particularly advantageous in situations where the cable/structure is embedded deep in soil or concrete, and cannot be easily repaired or replaced if any damage occurs.