초록 ▼

The invention can comprise a thermoplastic fuel tank or container having a vapor barrier comprising a cyclodextrin composition. A modified cyclodextrin that is chemically modified with substituents that increase the compatibility of the cyclodextrin material in the fuel container material can be use

The invention can comprise a thermoplastic fuel tank or container having a vapor barrier comprising a cyclodextrin composition. A modified cyclodextrin that is chemically modified with substituents that increase the compatibility of the cyclodextrin material in the fuel container material can be used. The improved fuel container obtains substantial barrier properties from the interaction between the cyclodextrin material in the fuel container materials with the fuel vapor permeant materials. The cyclodextrin in the fuel tank walls complexes or entraps fuel vapor that permeates through the materials making up the tank and are held within the tank material preventing the permeant fuel vapor from passing through the tank into the environment. The fuel vapor permeant can comprise a variety of well known materials including aliphatic and aromatic hydrocarbons, oxygenates such as tertiary butyl methyl ether, ethanol, methanol, and other combustible liquid fuel materials.

대표청구항 ▼

[ We claim:] [1.] A thermoplastic fuel tank for use in a motor vehicle, having improved fuel vapor barrier properties, the tank comprisinga shell having at least two layers: (a) a first layer comprising a structural thermoplastic material; and(b) a second layer comprising a thermoplastic film compri

[ We claim:] [1.] A thermoplastic fuel tank for use in a motor vehicle, having improved fuel vapor barrier properties, the tank comprisinga shell having at least two layers: (a) a first layer comprising a structural thermoplastic material; and(b) a second layer comprising a thermoplastic film comprising a continuous thermoplastic web having dispersed in the web, an effective fuel vapor barrier amount of a modified cyclodextrin having pendent moieties or substituents that render the cyclodextrin compatible with the thermoplastic polymer; rein the cyclodextrin is free of an inclusion complex compound and cooperates with the thermoplastic web to provide barrier properties.