The Dow Chemical Company

Dow Global Technolgoies LLC

Marsha L Langhorst

David H Bank

Jun Jason Cai

Kevin J Bouck

Abhijit A Namjoshi

Richard Baumer

Weijun Wang

Jun Cai

The present invention provides thermosetting resin pre-impregnated or infused fiber materials or prepregs comprising a thermosetting resin mixture and a fiber material component of a heat resistant fiber, such as carbon fiber, having an areal weight of from 500 to 3,000 g/m2 having a coating of from 0.5 to 4 phr of a latent, particulate curative or solid curative, preferably, dicyandiamide, wherein the prepregs are infused with a thermosetting resin mixture comprising (a) at least one liquid epoxy resin, and (b) a hardener and/or a catalyst, as well as methods of making the same. The prepregs of present invention enables the simple provision of lightweight composites having consistent resin cure throughout.

Catalyst-doped sizing agent for preparation of high areal weight fiber shelf-stable prepreg or molding compound intermediates

A sample of a volatile chemical component-containing liquid is segmented in stream flow with a gas with the volatile components partitioning or separating into the two phases, the gas then being separated from the stream and the volatile components therein analyzed for identification and concentration.

Method and apparatus for analyzing volatile chemical components in a

A multicapillary gas chromatography column comprising a bundle of single capillary columns each of which have essentially the same internal diameter and which are coated with essentially the same thickness of essentially the same stationary phase so that each column has essentially the same standard retention factor. A method of producing such a column is to cut a single fused silica capillary column into a number of essentially equal lengths and then to bundle the lengths together. Each bundle end can then be inserted into, for example, a graphite ferrule and then the multicapillary column can be conventionally installed into a gas chromatograph. The multicapillary column of the invention has the injection, detection and sample capacity advantages of a relatively large diameter capillary column with the speed and resolving power of a relatively narrow diameter capillary column.

Multicapillary gas chromatography column

A device for separating water vapor from a sample of air has been developed. The device utilizes a water permeable membrane to separate the water vapor from an air stream containing other vapors, for example, organic vapors. The device is applicable, for example, in industrial hygiene applications to reduce or change humidity in an air stream prior to collection of organics on a sorbent tube.

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Midland, MI, United States of America

Marsha L Langhorst