Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
1999-01-28
2001-10-02
Le, Hoa T. (Department: 1773)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C428S405000
Reexamination Certificate
active
06296938
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a reinforcing material compounded in a polymer like rubber or synthetic resin.
BACKGROUND OF THE INVENTION
Conventionally, a compounding material has been added to a polymer like rubber or synthetic resin so as to improve its physical characteristics of tensile strength, rigidity modulus, hardness, elasticity, frictional coefficient, or etc. Such compounding material is called as a reinforcing compounding material. For these reinforcing materials, there has been used carbon, light hydroxycalcium carbonate, silicon oxide, colloidal calcium carbonate, or etc. Recently, an increasing amount of a polymer material like synthetic rubber in industrial application has increased need of carbon black, silica (white carbon) and clay as a reinforcing material compounded in the polymer.
Such increasing need of reinforcing compounding materials like carbon black has kept them in a higher price. This has restricted that products made of a polymer material like rubber or synthetic resin with the reinforcing materials become lower in production cost.
SUMMARY OF THE INVENTION
The present invention aims to eliminate such disadvantage. That is, an object of the present invention is to provide a reinforcing material, which has a reinforced strength not less than known reinforcing materials such as carbon black, with a lower cost.
For achieving the object, the inventor of this application has made a research and found that a natural zeolite, which has been surface-treated by a silane coupling agent, has a reinforcing strength not less than the known reinforcing materials like carbon black. This led to the present invention.
That is, a reinforcing compounding material according to the invention includes a zeolite that has been surface-treated by a silane coupling agent.
The zeolite may be a natural zeolite.
The zeolite may have a grain diameter not more than 6 &mgr;m.
The zeolite may be a pre-dried zeolite.
The silane coupling agent may have a chemical formula described hereunder:
R—Si(OR′)
3
,
in which R is one selected among amino-, vinyl-, epoxy-, mercapto-, chlorine-, and methacryl-; R′ is one selected among methyl-, ethyl-, and &bgr;-methoxyethyl-.
The silane coupling agent may be a &agr;-aminopropyltriethoxysilane.
REFERENCES:
patent: 3928270 (1975-12-01), South, Jr.
patent: 4740538 (1988-04-01), Sekutowski
patent: 4828954 (1989-05-01), Hashimoto et al.
patent: 5034222 (1991-07-01), Kellett et al.
patent: 5891235 (1999-04-01), Suzuki et al.
patent: 6027817 (2000-02-01), Otsuki et al.
Armstrong Westerman Hattori McLeland & Naughton LLP
Le Hoa T.
Yazaki -Corporation
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