초록 ▼

Valves connected to dip tubes in conventional pressurized “aerosol”-type containers for dispensing materials which react or cure upon dispensing (e.g. moisture-curable polyurethanes), are protected against premature failure by introducing a small amount of dry, inert gas into the dip-tube shortly af

Valves connected to dip tubes in conventional pressurized “aerosol”-type containers for dispensing materials which react or cure upon dispensing (e.g. moisture-curable polyurethanes), are protected against premature failure by introducing a small amount of dry, inert gas into the dip-tube shortly after charging the container. The gas (e.g. nitrogen) acts as a barrier to prevent contact between the product in the container and the valve mechanism prior to use of the product. Preventing such contact avoids premature hardening of product in the valve mechanism caused by reaction of product with moisture.

대표청구항 ▼

An improved article of the aerosol type comprising a pressurized container comprising a mosture curable product to be dispensed, a liquified gas propellant, valve means associated with a dip tube for dispensing said product, and a sufficient amount of inert gas positioned in said dip tube between sa

An improved article of the aerosol type comprising a pressurized container comprising a mosture curable product to be dispensed, a liquified gas propellant, valve means associated with a dip tube for dispensing said product, and a sufficient amount of inert gas positioned in said dip tube between said product and said valve means to act as a barrier to prevent migration of said product to said valve means during shipment and storage of said article.