Raychem Limited

3l & T, Inc.

Other

Salutron, Inc.

Chang, Rong J.

Rong Jong Chang

Linas Mazeika

Keith Dawes

Lester T Toy

John A Midgley

Thomas Ying-Ching Lo

Erling Hansen

Matt Spalding

David D Nyberg

Edward A Cydzik

Peter M Godfrey

John W Hoffman

William L Betts, Iii

Surjit Gill

Edita Rojasova

Tuan Nguyenquang

Mario A Gutierrez

An ultrasonic monitor implemented on a PCB includes a transmission medium. The transmission medium may be biocompatible and implemented as an oil-based transmission medium, a gel pad, or a combination thereof. Ultrasonic signals are transmitted between the ultrasonic monitor and a living subject through the transmission medium. An air gap is formed in the PCB underneath transducer elements to provide for more efficient signal transmission. The entire ultrasonic monitor may be encapsulated in plastic, a transmission medium, or both to provide water resistant properties.

Ultrasonic monitor with a biocompatible oil based transmission medium

An ultrasonic monitor implemented on a PCB includes a gel pad comprised of a gel layer and a membrane layer. Ultrasonic signals are transmitted between the ultrasonic monitor and a living subject through the gel pad. An air gap is formed in the PCB underneath transducer elements to provide for more efficient signal transmission. These features provide for a low power, low cost, more efficient ultrasonic monitor. The entire ultrasonic monitor may be encapsulated in plastic, a gel, or both to provide water resistant properties.

Ultrasonic monitor for measuring blood flow and pulse rates

A single component sag-free liquid ebonite composition having silane coupling agents selected to chemically bond and convert liquid unsaturated rubber to alkoxy functionality, to consume and scavenge moisture originally present in the mixture, and to react with sulfur during vulcanization. The single component liquid ebonite composition is moisture activated and is particularly useful for coating applications in protecting metal from corrosion and chemical attack. In some embodiments, the liquid ebonite composition having a total mass percentage of 100 is mainly composed of liquid unsaturated rubber, sulfur, a vulcanization activator, a vulcanization accelerator, a first silane, a second silane, and a third silane. With the right reactive functional group, the third silane can replace the first or second silane. In some embodiments, the liquid ebonite composition includes a catalyst, carbon black, fillers, additives, and a diluent or solvent.

Moisture activated single-component ebonite composition

Overall, ebonite coatings or elastomeric linings are not recommended for direct immersion in sulfuric acid with higher than 65% concentration. By blending a chemical resistant epoxy resin to an ebonite coating, the resulting epoxy ebonite composition can be employed in more severe environment such as direct immersion in &#x3e;65% sulfuric acid. In particular, the present invention provides a blend of an epoxy coating with an ebonite coating with a mix ratio of 95/5 to 5/95, the resulting epoxy ebonite composition of which has greatly increased adhesion to steel and excellent resistance to undercut corrosion when subjected to salt spray. The epoxy ebonite composition according to the present invention can be used as coatings, adhesives, encapsulants or sealants and is particularly useful as industrial coatings that are subject to wide temperature variations, salt contamination or chemical attack.

Epoxy ebonite compositions

A liquid ebonite mixture for coating includes two reactive components. The first component contains first unsaturated polymers having first functional groups capable of reaction at ambient condition either with or without a catalyst, a vulcanization agent, and a vulcanization activator. The second component contains second unsaturated polymers having second functional groups that will react with the first functional groups at ambient temperature. The first and the second unsaturated polymers must contain sufficient unsaturated backbones to allow vulcanization with the vulcanization agent. In addition, the second unsaturated polymers must be thermodynamically compatible with the first unsaturated polymers so that macroscopic phase separation will not occur and the vulcanization can happen homogeneously through out the coating. The first and second components further include first and second viscosity reducers, which have viscosity lower than the first and the second unsaturated polymers, for adjusting the viscosity of the liquid ebonite mixture. Furthermore, a thixotropic agent, a reinforcing agent, a vulcanization activator, a vulcanization accelerator, a solubilizer for vulcanization agent, and a catalyst also can be added into the mixture. Liquid ebonite mixture of the present invention is sprayable, and a coating formed by this liquid ebonite mixture sets up quickly without sagging and has low tackiness that allows easy handling and inspection.

Quick set ebonite composition

Cavity sealing article

This invention provides a planar sealing article including: (a) a driver including a crosslinked foamable polymer, and (b) a sealer including an uncrosslinked foamable polymer in intimate contact with the driver and surrounding the driver in the plane of the article, the sealer having a plurality of apertures therethrough. The sealing article is especially adapted for forming a seal between a plurality of substrates and a bounded opening through which the plurality of substrates pass.

Sealing article

A cavity sealing article for use in a longitudinally extending cavity defined by cavity walls, the cavity having a cross-section within the cavity walls which is to be sealed at a predetermined location, comprises: (a) a driver comprising a crosslinked foamable polymer, the driver having a size, shape, and expansion ratio on foaming such that, when foamed within the cross-section of the cavity at the predetermined location, it substantially but incompletely occupies the cross-section of the cavity; and (b) a sealer comprising an uncrosslinked foamable polymer in intimate contact with the driver and surrounding the driver in the cross-section of the cavity, the sealer having a size, shape, and expansion ratio on foaming such that, when the cavity sealing article as a whole is foamed, the foamed sealer is forced into intimate and sealing contact with the cavity walls.

Cavity sealing article and method

An elastomer has a modulus intermediate between that of a conventional rubber and a gel. The elastomer includes (a) between 20 and 45 parts by weight of a semicrystalline elastomer having between 1 and 15% crystallinity and (b) between 80 and 55 parts by weight of a compatible liquid elastomer having a number-average molecular weight of between 1,500 and 8,500. The elastomer's modulus is sufficiently high to enable it to be fabricated into handleable articles, but is sufficiently low so that it provides effective sealing of substrates it covers without the need for introducing a separate sealing material such as a mastic or adhesive.

Low modulus elastomer

A planar cavity sealing article comprises:

The invention provides for a method of molding an elastomeric material which avoids longitudinal mold lines and an improved molding composition as well as molded parts for hybrid insulators and the like.

Molding methods, track resistant silicone elastomer compositions and

Molding methods, track resistant silicone elastomer compositions, and

A tracking and erosion resistant composition includes (a) 100 parts by weight of organopolysiloxane; (b) between 1 and 15 parts by weight of magnesium oxide; (c) between 15 and 45 parts by weight of zinc oxide and (d) between 5 and 40 parts by weight of iron oxide.

Tracking and erosion resistant composition

The invention relates to novel gelloid composition comprising a crosslinked non-silicone polymer having an olefinic unsaturated content of less than 10 mole percent and having dispersed therein a liquid in an amount of from about 20% to about about 95% by weight based on the weight of the liquid and polymer and from 0 to 0.3 volume fraction of a filler, said cross-linked polymer

Method of making heat stable polymeric gelloid composition

A method for covering a substrate comprising the steps of: positioning over the substrate an assembly including a recoverable elastomeric sleeve and a mandrel upon which the sleeve is mounted under tension in an expanded condition such that upon release of the tension the sleeve tends to assume a smaller cross-sectional dimension and thereupon cover the substrate; the mandrel having a generally tubular configuration and defining a series of spaced apart, substantially longitudinal projections extending radially outwardly, the sleeve being in substantial contact with the longitundinal projections; and, withdrawing the mandrel from the sleeve by sliding the mandrel longitudinally away from the sleeve while maintaining its position over the workpiece, the sleeve thereby progressively assuming a smaller cross-sectional dimension to cover the substrate as the mandrel is progressively withdrawn. The substrate may be a high voltage termination or cable splice, and the mandrel may include a medial annular transverse tearline enabling breaking and separation of the mandrel into two segments for facilitating withdrawal from, and recovery of, the sleeve. A lubricating agent may be placed between the longitudinal projections. The sleeve may be provided with end segments which avoid contact with the lubricating agent and which are unfolded following release of the sleeve onto the substrate thereby to seal the ends thereof.

Growing community of inventors

Fremont, CA, United States of America

Rong Jong Chang