Southwest Research Institute

Electric Power Research Institute Incorporated

Micro Flo Company

William A McMahon

Donald J Mangold

Robert E Lyle, Jr

Chel W Lew

Keith L Branly

Bruce S Bernstein

William W Harlowe, Jr

David A Trujillo

Nollie F Swynnerton

The present invention provides an apparatus and method for controlled release of a fumigant into a wooden structure to prevent decay of that structure. According to the present invention, a fumigant in an ampule or container is inserted into the wooden structure. The ampule or container is made of a polymeric material that does not react with the fumigant, but having walls which are permeable to the fumigant such that, when inserted into the wooden structure, the rate of release of the fumigant through the walls of the ampule is slow enough to continuously treat and arrest decay of the wooden structure, particularly decay caused by fungi, over extended periods of time (i.e., 1, 5, 7, 10, 15, 20 or 30 years). The rate of release of the fumigant can be controlled by the type of fumigant, the shape of the container, the specific polymer used to make the container, and by the thickness of the container wall.

Controlled release ampule containing a fumigant

Controlled fumigation of wooden structures

Microcapsules are prepared by encapsulating a core material with a capsule shell wall containing glutaraldehyde crosslinked gelatin and at least one water soluble plasticizer that reduces the permeability of the crosslinked gelatin. Optionally, the capsule shell wall also contains a feeding deterrent that dissuades accidental ingestion of the microcapsule. Upon exposing the microcapsules to water, the plasticizer is removed making the shell wall permeable whereby the encapsulated core material is released. Materials such as insecticides, herbicides, plant growth regulating agents, and fungicides may be encapsulated and released at a controlled location, time and rate.

Controlled release microcapsules

Microcapsules are prepared by encapsulating a core material with a capsule shell wall containing glutamldehyde crosslinked gelatin and at least one water soluble plasticizer that reduces the permeability of the Crosslinked gelatin. Optionally, the capsule shell wall also contains a feeding deterrent that dissuades accidental ingestion of the microcapsule. Upon exposing the microcapsules to water, the plasticizer is removed malting the shell wall permeable whereby the encapsulated core material is released. Materials such as insecticides, herbicides, plant growth regulating agents, and fungicides may be encapsulated and released at a controlled location, time and rate.

A radioprotective agent consisting essentially of 3-(3'-aminoalkyl)-2-arylthiazolidine or a pharmacologically acceptable salt thereof having the formula: ##STR1## wherein R is a NH.sub.2 R' or XNHR' radical in which R' is a C.sub.2 to C.sub.4 alkyl group and X is a C.sub.1 to C.sub.3 alkyl group and Ar is an aromatic aldehyde moiety; or a pharmacologically acceptable salt thereof.

Radioprotective agents and their method of manufacture

A polymeric decontamination composition comprising a polymeric reaction product resulting from the reaction of a polyvinylbenzyl halide and a monomeric amine admixed with an alkali metal hydroxide solution capable of swelling said polymeric reaction product and the method of making the composition.

Swelled polymeric decontamination composition

A polymeric chemical warfare agent decontamination composition comprising a polymeric quaternary pyridinium salt resulting from the reaction of a polyvinylbenzyl salt and a di(C.sub.l -C.sub.n alkyl) aminopyridine wherein n is 20 or higher, and the method of making such pyridinium salt is disclosed wherein the reaction product is a polymer of the formula: ##STR1## wherein R is a C.sub.1 to C.sub.20 or higher alkyl group.

Growing community of inventors

San Antonio, TX, United States of America

William A McMahon