Shell Oil Comapny

Other

John A Lopez

Ronald S Bauer

Christopher W Uzelmeier

Darrell R Word

Ingo Cyliax

Michael Caisse

Rod Sorenson

The instrument utilizes at least one electromagnetic signal transmitter and at least one electromagnetic signal receiver with the receiver detecting a receiver signal responsive to the transmitter signal and indicative of subterranean details adjacent to the instrument. The instrument is attachable to a tow vehicle for transport and includes a GPS antenna and tags data gathered by the instrument with GPS position information. The instrument is formed in modular sections which can be removably attached for collapsing into a smaller space and to allow for flexible configuration of the instrument in various different ways. A wheeled carriage is provided to carry the instrument over the ground. Antennas for the transmitter and receiver, as well as circuitry and cooling systems are all provided to supply the instrument with high resolution and a clear signal indicative of the position and characteristics of subterranean details of interest.

Electromagnetic subterranean imaging instrument

A composition is provided comprising an epoxy resin, a nitroparaffin and a sulfonic acid. The presence of the sulfonic acid retards gellation of nitroparaffin-containing epoxy compositions intended for use in water-dispersible coating formulations cured with modified polyamine resins.

Stabilization of epoxy/nitroparaffin solutions

A composition is provided comprising an epoxy resin, a nitroparaffin and a sulfonic acid. The presence of the sulfonic acid retards gellation of nitroparaffin-containing epoxy resin compositions intended for use in water-dispersible coating formulations cured with modified polyamine resins.

The present invention is directed to storage-stable precatalyzed polyepoxides containing a catalytic amount of an ammonium salt and to a process for preparing higher molecular weight polyepoxides by reacting the precatalyzed polyepoxide with a polyhydric phenol or polymeric fatty acid.

Stable precatalyzed saturated epoxy resin compositions

Vinyl esters exhibiting reduced viscosity are prepared by esterifying at least 90% of the pendant hydroxyl groups of a vinyl ester prepared by reacting an epoxy resin with an ethylenically unsaturated carboxylic acid with a fatty acid or rosin acid.

Low viscosity vinyl ester resins

A precatalyzed, elevated temperature storage-stable epoxy composition is described wherein the catalyst composition is a mixture of a phosphonium halide and an alkali metal salt of a hydroxide or halide. The preparation of higher molecular weight fusion products wherein the precatalyzed epoxy composition is reacted with a polyhydric phenol is also described.

Storage-stable precatalyzed polyepoxide compositions

Stable, high-solids, low-temperature baking compositions are prepared by first reacting an epoxy resin with a polymeric fatty acid, and then reacting the resulting condensate with more than 2% by weight of a strong acid, and adding a curing amount of an amino-containing resin.

Growing community of inventors

Houston, TX, United States of America

John A Lopez