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US 5,331,022 AGranted
Method for the reduction of radon load in closed spaces
AssigneeHesco AG, Industrieconsulting & Industrievertretungen
InventorsLudwig Jochmann, Josef Hess
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Abstract
For the reduction of the radon load in enclosed spaces, an aqueous, solvent and softener-free dispersion of a vinylidene chloride-acrylate-copolymer is applied to the boundary surfaces of the room and left to dry. The dispersion contains also a nonionic surfactant on a base of alkylphenolethoxylate with a proportion of 10 mole ethylene oxide, a vinyl pyrrolidone-copolymer and a defrothing agent.
Claims7
A method of reducing a radon load in a space bounded by surfaces, said method comprising the steps of:
- (a) providing a composition consisting essentially of
- a vinylidene chloride-acrylate copolymer dispersion in water,
- an alkylphenolethoxylate nonionic surfactant containing 10 moles of ethylene oxide per mole of the alkylphenolethoxylate,
- a thickening agent selected from the group which consists of
- a vinyl pyrrolidone copolymer, and
- a diurethane solution in a water/propylene glycol/isopropanol mixture, and
- a defrothing agent;
- (b) applying said composition to said boundary surfaces;
- and
- (c) allowing said composition to dry on said surfaces.
7 more elements
Dependencies are inferred from the claim text.