 Portland cement, process for preparing same, and compositions containing same |
| I claim: 1. A Portland cement composition comprising (1) dry powder of Portland cement, whose ... |
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| Rubber vulcanizates having improved hysteresis behavior |
| We claim: 1. Rubber vulcanizates produced from at least one rubber, a crosslinking agent, a filler, ... |
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| Ink jet recording having an ink with carbon black |
| Accordingly, it is an object of the present invention to solve the above-described problems of ... |
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| Conductive coating composition comprising pigment grade carbon |
| Now it has been found that a conductive coating composition which comprises: a) a pigment-grade ... |
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| EPDM, HNBR and Butyl rubber compositions containing carbon black products |
| OF THE INVENTION The present invention relates to a rubber composition prepared by the process ... |
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| Carbon black products for coloring mineral binders |
| The claimed invention is: 1. A mineral binder composition comprising a mineral binder and a carbon ... |
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| Dispersible carbonblack pellets |
| OF THE INVENTION The pellets of the present invention can be formed by agglomeration, either under ... |
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| Compositions of modified carbon products and amphiphilic ions and methods of using the same |
| What is claimed is: 1. A composition comprising a) an amphiphilic ion and b) a modified carbon ... |
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| Process for crosslinking |
| We claim: 1. A process for crosslinking comprising (a) introducing into a reactor, under ... |
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| Rubber composition and tire having tread thereof |
| What is claimed is: 1. A tire having a tread of a rubber composition comprised of the product of ... |
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Corrosion resistant coating for an iron-based part and method for applying same
| Details |
Inventors: Homi, Makoto;
Assignee: Tsubakimoto Chain Co. (Osaka, JP)
Primary Examiner: Thibodeau; Paul
Assistant Examiner: Kruer; Kevin R
Attorney, Agent or Firm: Dann, Dorfman, Herrell & Skillman, Skillman; Henry H.
A method for treating a fastening part made from an iron-based alloy comprising the steps of degreasing and blasting the part; coating the part with an epoxy resin undercoating; and applying another coating thereon as a finish coat. The epoxy resin undercoating comprises a mixture of a first composition comprising, in parts by weight, about 20-200 parts of a zinc dust, about 0.05-0.5 parts of a thermally expanding powder having micro capsules adapted to explode when heated to form voids in the coating, and provide limited porosity, and about 10 parts of a vehicle mainly composed of an epoxy resin and a second composition comprising, in parts by weight, about 0.2-2.5 parts of an epoxy type silane coupling agent and about 100 parts of the zinc dust. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of this invention will now be described.
The present invention relates to a method of surface treating a fastening part to provide a fastening part which is free from hydrogen embrittlement and which has improved corrosion resistance.
The method comprises the step of coating or painting the part with an epoxy resin undercoating containing zinc dust.
To paint the fastening part, standard techniques such as spray coating and dip coating can be employed.
Further, when dip coating is used, the part can be spun (i.
e.
, a "dip-spin" coating process) after impregnation in order to scatter any excess coating material through the use of centrifugal force.
The dip-spin coating process is capable of providing a coating of relatively uniform film thickness without coating unevenness and, accordingly, is the technique most generally used as the painting method for fastening parts.
According to the present invention, the epoxy resin undercoating comprises a mixture of a first composition comprising, in parts by weight, about 20-200 parts of a zinc dust, about 0.
05-0.
5 parts of a thermally expanding powder, and about 10 parts of a vehicle mainly composed of an epoxy resin and a second composition comprising, in parts by weight, about 0.
2-2.
5 parts of an epoxy type silane coupling agent based upon 100 parts of the zinc dust.
The vehicle mainly composed of an epoxy resin is formed of a bisphenol type epoxy resin and one hardener selected from the group consisting of a polyamine resin, a polyamide resin, an amino resin, or a combination of any two or more of said polyamine resin, said polyamide resin, and said amino resin.
The mixing ratio of bisphenol epoxy resin to hardener is not critical and, therefore, can be varied over a significant range while still providing the benefits of the present invention.
The bisphenol epoxy resin may comprise, for example, EPOTOHTO YD-134, EPOTOHTO YD-011, EPOTOHTO YD-014, and EPOTOHTO YD-017 (trade names manufactured by Toto Kasei Co
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Adhesives and Rubbers 
