USA As Represented by Secretary of the Navy

Other

Science Applications International Corporation

Geo-centers, Inc.

The Government of the United States of America, As Represented by the

Robert F Brady, Jr

Ronald R Price

Joel M Schnur

Paul E Schoen

Walter J Dressick

Daniel Zabetakis

Ann E Mera

Dana Leamann

Bor-Sen Chiou

Alan S Rudolph

Jacque H Georger, Jr

Gregory T Pawlikowski

Mary A Testoff

Allison M Sikes

James D Adkins

Larry W Kraft

The present invention provides microwave attenuating, filled composite materials which contain a polymer or ceramic matrix and metallic tubules and processes for making the same and devices which contain such materials.

Microwave-attenuating composite materials, methods for preparing the same, intermediates for preparing the same, devices containing the same, methods of preparing such a device, and methods of attenuating microwaves

The invention herein pertains to a method for reducing adhesion of marine organisms to a substrate and an article that is a substrate having thereon a solid coating of a fluorinated polyurethane elastomer. The elastomer is tough and has antifouling and release properties in reference to marine organisms. The method includes the steps of providing a liquid mixture of the fluorinated polyurethane elastomer, applying the elastomer mixture to said substrate, and curing the elastomer mixture to a solid coating of the fluorinated polyurethane elastomer, the elastomer having surface energy (which is a function of fluorine content) of 15-30 milli J/m , Young's modulus of elasticity of 2-15 MPa, and fluorine content of 3-25%.

Robust nontoxic antifouling elastomers

Tubules which contain an active agent in their lumen and compositions containing such microtubules are effective for providing a slow, controlled release of the active agent. Such microtubules are useful in the production of coating compositions for the protection of surfaces coming into contact with water, adhesive resins for the production of laminated wood products, and devices for dispensing pesticides.

Method of controlled release and controlled release microstructures

A robust, nontoxic, antifouling coating and bulk material and process for king the same are disclosed. The antifouling coating comprises a basecoat formed typically from a polyol and a poiyiisocyanate wherein a molar excess of poiyiisocyanate is typically used. A topcoat is formed on the basecoat by reacting the basecoat with aliphatic branched or unbranched mono-alcohol or polyol.

Robust, nontoxic, antifouling polymer

A cross-linked pipelining network polymer composition for the in situ rehabilitation of pipes is formed. The polymer composition comprises at least one liquid epoxy resin and an effective amount of a liquid curing agent blend comprising an aliphatic polyamine, an aliphatic imidazoline, and an aliphatic amidoamine. The polymer composition may further comprise a pigment, a diluent and/or a viscosity controlling agent.

Epoxy pipelining composition and method of manufacture

A robust, nontoxic, antifouling coating and process for making the same are isclosed. The antifouling coating comprises a basecoat formed typically from a polyol and a polyiisocyanate wherein a molar excess of polyiisocyanate is typically used. A topcoat is formed on the basecoat by reacting the basecoat with aliphatic branched or unbranched diol.

Controlled release microstructures

This invention is directed to a thermoplastic polymer that is solid at room temperature and which expands on further polymerization, to form a crosslinked polymer, and to a process for preparing the polymer and the crosslinked polymer. In a preferred embodiment the polymer is prepared by polymerizing 10-90 but preferably 20-80 mole percent of a lower alkyl acrylic monomer containing a spirobislactone moiety, 10-90 but preferably 20-80 mole percent of a lower alkyl acrylic monomer containing an epoxide moiety, and 0.1-5 but preferably 0.5-1 mole percent of a lower alkyl acrylic monomer containing a functional moiety chosen from primary amino, secondary amino, mercaptan, and hydroxyl groups which can initiate crosslinking with the spirobislactone moiety. The crosslinked polymer is devoid of a spirobislactone carbonyl absorption band and is insoluble in conventional organic solvents.

Spirobislactone acrylate polymers

Bislactone curing agents are used to cure and copolymerize with epoxy-based esins. Preferably, the copolymerization is performed using a tertiary amine catalyst. During cure, the bislactone ring opens and expands. The use of bislactones as curing agents for epoxy-based resins avoids the shrinkage and accompanying stresses which occur when epoxy-based resins are cured conventionally. The novel bislactone cured epoxy-based polymers according the present invention are less prone to failure than are conventional epoxy-based polymers. In a further embodiment, the epoxy is copolymerized with a novel bislactone monomer having at least one trifluoromethyl group. The resulting fluorinated copolymer has a reduced surface energy.

Bislactone curing agents for epoxy resins and polymers obtained therefrom

A coating composition contains an effective amount of between 5 and 70 percent by weight of metalized tubules which are or which encapsulate a composition known to have an antifouling effect or known to possess antimicrobial, herbicidal algaicidal or pesticidal (biocidal) properties. When the coating composition is applied to a surface to be protected, a toxic surface environment is formed. The tubules can be used alone or the tubules can contain in the hollow core a secondary or co-biocidal agent or mixtures of these agents. When desired, the metal coating layer metalizing the tubule can be a non-biocidal metal. In those cases, protection is provided by the biocidal agent carried in the core.

Coating and composition containing lipid microstructure toxin dispensers

A nonskid coating formulation comprising, by weight, 3 to 8% amine resins, to 13% epoxy resins, 17 to 22% pigments, fillers, and thickeners, 10 to 20% solvents and 39 to 56% aggregates.

Growing community of inventors

Gaithersburg, MD, United States of America

Robert F Brady, Jr