Battelle Development Corporation

USA As Represented by Secretary of the Navy

Other

Battelle Memorial Institute

Stephen D Rodgers

Richard J Dick

Vincent D McGinnis

Vincent Daniel McGinniss

Robert F Supcoe

Robert E Russell, Iii

Thomas Radakovich

Bernard R Appleman

An intumescent coating system and method therefor is disclosed for thermally protecting a substrate having a surface exposed to a flame environment. The coating system of the present invention is provided as having a having a first component which forms a rigid carbonific char foam having toughness and rigidity, and a second component which forms an insulative carbonific char foam having a density about half the density of the rigid carbonific foam to give insulation properties. The two foam components may be separately provided in a laminate-type arrangement as, respectively, an inner coating layer coated and cured on the surface of the substrate to form an inner film layer, and an outer coating layer coated and cured on the inner film layer to form an outer film layer. Alternatively, the two foams may be provided as being formed from components blended to comprise a single coating layer which is coated and cured on the surface of the substrate to form a film layer. In providing two foam components, one protecting the substrate from breakthrough and direct exposure to the flame environment, and the other insulating the substrate to protect it from conductive, radiant, and/or convective heating by the flame environment, the present invention affords a capability to offer flame retardancy at film thicknesses of less than 50 mils.

Thermally-protective intumescent coating method

The invention relates to room temperature-curable, non-emissive, flame-retardant coating compositions. The main resin for the coating compositions is a flame-retardant polymer selected from an air dryable flame-retardant polymer, a room-temperature curable mixture of a flame-retardant polymer and curing agent therefor, and mixtures thereof. The solvent for the coating composition is selected from water, a liquid, curable, non-flame promoting solvent and mixtures thereof. The novel liquid, curable, non-flame promoting solvent comprises a liquid polyhalogenated organic ring compound substituted with an air-dryable group.

Non-emissive, flame-retardant coating compositions

Room-temperature-curable, non-emissive, flame retardant coating compositions.

This invention provides an underwater antifoulant coating that is of a pa-like viscosity and is applied to an underwater surface by brush and comprises a mixture of multiple chlorinated and/or fluorinated waxes, an antifoulant biocide, and a fumed silica utilized as a thickener and produces a viscosity of about 26.75 poises at 25.degree. C., and a density of about 1.28.

Underwater applicable antifoulant paint composition

Disclosed is a non-emissive, flame-retardant coating composition comprising a flame-retardant polymer; a solvent selected from water and/or a liquid, curable, non-flame promoting polyhalogenated solvent containing air-dryable functionality; and, optionally, a non-emissive, non-flame promoting surface-active agent selected from: a cationic, non-emissive, non-flame promoting, curable polyhalogenated compound containing an air-dryable group and a cationic surface-active group; an anionic, non-emissive, non-flame promoting, curable polyhalogenated compound containing an air-dryable group and an anionic surface-active group; and a nonionic, non-emissive, non-flame promoting polyhalogenated compound containing a nonionic surface-active group. Also disclosed is a method for reducing the emissivity of a polyamine/polyamide hardener for an epoxy resin wherein volatile, mobile, low molecular weight amine components in the hardener are reacted preferentially with a trapping agent selected from an epoxy compound and an alpha-, beta-ethylenically unsaturated carbonyl compound. Further disclosed is a method for reducing the tendency to crystallize and to retard dispersion in water of a highly halogenated polyepoxide resin by forming an adduct between at least a fraction of said halogenated polyepoxide resin and a long chain aliphatic compound.

A modular antifouling tile is formed with a plurality of reservoirs that contain antifoulant which diffuses therefrom through the matrix of the coating. The coating matrix is preferably formed of an elastomeric material selected from the group of butyl and natural rubbers, neoprene, polybutylene, polyisoprene, polybutadiene, polysulfides, polyurethanes, vinyls, polyacrylonitriles, and copolymer blends thereof. Selected antifoulants that diffuse through a coating matrix of the abovementioned materials include tributyltin oxide and 2, 4, 5, 6-tetrachloroisophthalonitrile.

Antifouling tile containing antifoulant reservoirs for in situ

A polyisobutylene based acoustically transparent, camouflage antifouling nt for coating rubber substrates without adversely affecting the chemical stability and sound absorbing characteristics of such substrates. The composition essentially comprises, by weight, non-volatile ingredients including from about 2% to about 23% polyisobutylene polymer of molecular weight from about 81,000 to 99,000; from about 23% to about 29% rosin; from about 45% to about 57% tributyltin flouride and from about 9% to about 11% pigment.

Growing community of inventors

Bowie, MD, United States of America

Stephen D Rodgers