Compositions: coating or plastic – Coating or plastic compositions – Leak stopping
Reexamination Certificate
2000-07-11
2001-07-24
Brunsman, David (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Leak stopping
C106S164400, C106S166100, C106S187100, C106S203200, C523S166000, C524S034000, C524S035000, C524S039000
Reexamination Certificate
active
06264732
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a puncture preventive sealant filled in a sealant chamber defined in a tube adjacently to an air chamber.
2. Description of Related Art
Japanese Patent Laid-open No. Sho 50-72303 discloses a technique in which a sealant containing a fiber component is enclosed in a tire tube of an automobile for repairing damage to the tube. For example, if the tube is pierced by a nail or the like, the sealant prevents leakage of air from the tube. This sealant contains short-fibers and a fine crystal powder of cellulose in a liquid polymer or an aqueous solution, wherein the ratio of the fine crystal powder of cellulose is set to be larger than that of the short-fibers for suppressing the flow of the short-fibers in the tube.
The above-described sealant has been developed from the viewpoint of an extensive flow of a sealant in a tube, and has been configured wherein the content of the fine crystal powder of cellulose is set to be larger than that of the short-fibers for suppressing the flow of the short-fibers in the tube. Such a sealant, however, has a problem since the fine crystal powder of cellulose is produced by processing cellulose fibers and thereby it is higher in cost than the cellulose fibers, with a result that the increased content of the fine crystal powder of cellulose leads to a significantly increased cost.
SUMMARY AND OBJECTS OF THE INVENTION
In view of the foregoing, the present invention has been made, and an object of the present invention is to provide a sealant capable of reducing the content of cellulose fibers for suppressing the cost of the sealant while keeping a high sealing performance of the cellulose fibers.
According to the present invention, there is provided a puncture preventive sealant filled in a sealant chamber defined in a tube adjacent to an air chamber, the sealant includes a fiber component contained in a solvent, wherein the fiber component includes synthetic fibers and cellulose fibers which are mixed in such a mixing ratio that the content of the cellulose fibers is smaller than that of the synthetic fibers.
According to the present invention, there is provided a puncture preventive sealant wherein the content of the synthetic fibers is in a range of from 75 to 90 wt %, and the content of the cellulose fibers is in a range of from 25 to 10 wt %.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 4137206 (1979-01-01), Kent
patent: 4256158 (1981-03-01), Chautard et al.
patent: 4867792 (1989-09-01), Ronlan
patent: 5226958 (1993-07-01), Bowman et al.
patent: 5772747 (1998-06-01), Turner et al.
Tanaka Akiko
Yamagiwa Toshio
Birch & Stewart Kolasch & Birch, LLP
Brunsman David
Honda Giken Kogyo Kabushiki Kaisha
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