Containers and compositions for sealing them
AssigneeW. R. Grace & Co.-Conn.
InventorSteven A. C. White
Life of this patent
Estimating the term…
Abstract
A package formed of a wooden crate or pallet impregnated with a chlorinated phenol and/or anisole wood preservative, one or more bottles containing a potable material, such as beer, a cap on each bottle and a sealing gasket between the bottle and the cap. The gasket is formed of butyl rubber (20 to 80% by weight) and one or more thermoplastic polymers, preferably polyethylene (40 to 60% by weight).
Claims18
A package comprising a wood structure wherein the wood structure has been impregnated with a chlorinated substance, a bottle filled with a potable material, a cap and a sealing gasket between the bottle and the cap, wherein the gasket is formed of a thermoplastic composition that is a homogeneous blend of from about 20 to about 60% by weight of the composition of butyl rubber formed a copolymer of isoprene and butylene and has a Mooney viscosity (ML1+8 at 110.degree. C.) of below 50 and from about 40 to about 80% by weight of the composition of one or more thermoplastic polymers and wherein the thermoplastic composition is impermeable to chlorinated substances selected from the group consisting of chlorinated phenols, chlorinated anisoles and both.
A method of preventing the ingress of chlorinated substances into a potable material comprising forming a gasket of from about 20 to about 60% by weight of the composition of butyl rubber and from about 40 to about 80% by weight of the composition of one or more thermoplastic polymers, placing the gasket in a cap and sealing the cap to a body containing the potable material.
A package comprising a wood structure selected from the group consisting of pallets and crates wherein the wood has been impregnated with a chlorinated substance selected from the group consisting of chlorinated phenols, chlorinated anisoles and both, a bottle filled with potable material and that is formed of a body, a cap and a sealing gasket between the body and the cap, wherein the gasket is formed from a thermoplastic composition that is a homogeneous blend of about 20 to about 60% by weight of the composition of butyl rubber formed a copolymer of isoprene and butylene and has Mooney (ML1+8 at 110.degree. C.) of below 50 and from about 40 to about 80% by weight of the composition of a thermoplastic polymer.
A package comprising a wood structure selected from the group consisting of pallets and crates wherein the wood has been impregnated with a chlorinated wood preservative selected from the group consisting of chlorinated phenols, chlorinated anisoles or both, the package further comprising one or more bottles, the one or more bottles containing a potable material and being sealed by a cap containing a sealing gasket, the gasket being formed of a homogeneous blend of from about 20 to about 60% by weight of the blend of butyl rubber and from about 40 to about 80% by weight of the blend of one or more thermoplastic polymers.
Dependencies are inferred from the claim text.