Mazda Motor Corporation

Nippon Paint Compnay, Ltd.

Yoshio Tanimoto

Tadamitsu Nakahama

Takakazu Yamane

Toshiki Takahashi

Makoto Aizawa

Masataka Matsui

Toshiaki Aono

Akemi Muraoka

Tsuneo Kishimoto

Tatsuto Fukushima

Shunji Masuda

Toshifumi Ogasawara

Hiroyuki Uemura

Kazuhiko Kobayashi

Hajime Tanigami

There is provided a process to recover phthalic anhydride from a plastic material which contains a phthalate ester as a plasticizer comprising the steps of: (a) heating the plastic material so that the plastic material is gasified to produce a first product, (b) contacting the first product with alumina catalyst so that the product is catalytically cracked to produce a first catalytically cracked product comprising phthalic anhydride; and (c) recovering phthalic anhydride from the first catalytically cracked product.

Process of recovering useful material through cracking of plastic

There is provided a process to recover phthalic anhydride from a plastic material which contains a phthalate ester as a plasticizer comprising the steps of:

Process for recovering phthalic anhydride and hydrogen chloride from

The coating method contains a spraying step in which a paint is sprayed at least on a coating substrate extending in an upward and downward direction to a film thickness thicker than causing sages of the sprayed paint. The coating substrate on which the paint is sprayed is rotated about the horizontal axis while the sprayed paint is dried until it does not sag any more. The coating apparatus includes a carriage conveying the coating substrate arranged to run along the conveying direction, and the carriage is provided with a supporting base for supporting the coating substrate rotatively about the horizontal axis. One embodiment for rotating the substrate supported by the supporting base is a spring that is disposed on the carriage to rotate the substrate by means of a restoring force produced by the spring. On the passage for conveying the carriage is disposed a force storing mechanism for storing the restoring force in the spring that released the restoring force. Another embodiment therefor is a combination of a chain disposed along the conveying passage for the carriage with a sprocket disposed on the carriage. The sprocket is engagable with the chain and operatively coupled to the coating substrate. By disposing the chain in a fixed manner, on the one hand, the substrate is cause to rotate as the carriage is being conveyed. By dividing the chain, on the other, the substrate is caused to rotate while the conveyance of the carriage is suspended.

Coating method in coating line and coating apparatus therefor

A method of obtaining hydrocarbon oil from waste plastic material or waste rubber material, comprising the steps of: subjecting the waste plastic material or the waste rubber material to thermal cracking so as to obtain a thermal cracking product; liquefying the thermal cracking product into a liquefied product; causing a liquid phase cracking reaction of the liquefied product under action of a catalyst on the liquefied product so as to produce a cracking product; and cooling the cracking product so as to obtain the hydrocarbon oil, and an apparatus used for carrying out the method.

Method of obtaining hydrocarbon oil from waste plastic material or waste

Waste plastics are heated so as to be thermally decomposed and produce a vapor product containing oil and gas components. The vapor product is brought into contact with a solid acid catalyst containing a hydrochloric acid as a decomposing activator to be cracked so as to recover a low boiling point hydrocarbon oil.

Method of and apparatus of producing low boiling point hydrocarbon oil

A method for repairing the surface of a coating involves the step of rubbing a compound having a Vickers hardness of above Hv 2,000 g/mm.sup.2 on the surface of the coating with a buff at a uniform surface pressure ranging from 2 to 20 g/cm.sup.2. This method permits the repair of scratched or scraped coating surfaces to produce coating surfaces of high quality without causing fade on the surfaces.

Method for repairing a coating surface

The coating method contains a spraying step in which a paint is sprayed at least on a coating substrate extending in an upward and downward direction to a film thickness thicker than causing sags of the sprayed paint. The coating substrate on which the paint is sprayed is rotated about the horizontal axis while the sprayed paint is dried until it does not sag any more. The coating apparatus includes a carriage conveying the coating substrate arranged to run along the conveying direction, and the carriage is provided with a supporting base for supporting the coating substrate rotatively about the horizontal axis. One embodiment for rotating the substrate supported by the supporting base is a spring that is disposed on the carriage to rotate the substrate by means of a restoring force produced by the spring. On the passage for conveying the carriage is disposed a force storing mechanism for storing the restoring force in the spring that released the restoring force. Another embodiment therefor is a combination of a chain disposed along the conveying passage for the carriage with a sprocket disposed on the carriage. The sprocket is engageable with the chain and operatively coupled to the coating substrate. By disposing the chain in a fixed manner, on the one hand, the substrate is caused to rotate as the carriage is being conveyed. By dividing the chain, on the other, the substrate is caused to rotate while the conveyance of the carriage is suspended.

Coating a rotating vehicle body

A highly reflective surface coating on a substrate is formed by a coating method in a coating line. A paint is sprayed on the substrate in a viscosity of 18 seconds or lower when measured by means of Ford Cup #4 at 20.degree. C. in a film thickness thicker than a thickness at which the paint sags, the paint containing a solvent or solvents, having a boiling point as high as 110.degree. C. or lower in an amount of 50% by weight or higher. After completion of the spraying, a coat of the paint is dried by a drying step including sequential setting and baking steps. The substrate is held in an ambient temperature during the setting step which is lower than the ambient temperature during the baking step, and the rotation of the substrate in the drying step being carried out about its horizontal axis at a speed which is high enough to rotate the substrate from a vertical position to a horizontal position before the paint coated thereon substantially sags due to gravity yet which is low enough so as to cause no sagging as a result of centrifugal force, thereby allowing the coat formed thereon to achieve a substantially sagless state. This coating method prevents the paint from swelling on an edge portion of the substrate forming a mass, whereby a coat surface is provided with a high degree of flatness.

Coating method

A method for repairing a high solid metallic coating on car bodies which involves applying at the area to be repaired an undercoat composition based on the same coating composition as used in the baked high solid metallic coating and with specified amounts of melamine resin and isocyanate compound added, the melamine resin having imino and methylol groups and the sum of the imino groups and methylol groups per triazine ring being 2.3 to 3.3, applying onto the undercoat a two-package urethane clear top coat composition on a wet-on-wet basis and finally drying the coats at 80.degree. C. or less.

Method for repairing a high-solid metallic coating

In a coating, line a first substrate such as a vehicle body, made of a steel plate, is coated separately from a second substrate made of a different material including a plastic, such as vehicle parts, i.e., bumpers and so on, and the parts are assembled with the vehicle body. The vehicle body and parts are coated separately to form each a highly reflective surface coating. The coating is implemented by a spraying step for spraying the paint on them to form a coat; and a drying step for drying the coat. The paint is sprayed in the spraying step in a film thickness which is thicker than a thickness at which the paint sags on a surface extending at least upwardly and downwardly. And the coat on each of the substrates is dried in the drying step while being rotated about its horizontal axis for a period of time ranging at least from before the paint starts sagging to until the paint achieves a substantially sagless state, rotation of the substrate being carried out at a speed which is high enough to rotate the substrate from a vertical position to a horizontal position before the paint coated thereon substantially sags due to gravity yet which is low enough so as to cause no sagging as a result of centrifugal force.

Method for coating and assembling substrates of different

In the coating method containing a coating step for coating a substrate with a paint and a drying step for drying the paint coated thereon, the paint is sprayed on a side extending in an up-and-downward direction and a side extending a horizontal direction in the coating step in such a manner that it is coated in a given film thickness on the horizontally extending side and in a film thickness on the up-and-downwardly extending side, which is thicker than its sagging limit thickness in which it sags. The coating is effected such that the coating on the up-and-downwardly extending side is finished at the same time as or subsequent to the coating on the horizontally extending side. In the drying step, the substrate is rotation about its horizontal axis extending in a horizontal and longitudinal direction of the substrate during a period of time from before the paint sags to until it is cured to a sagless state. The rotation of the substrate is carried out at a speed which is high enough to reverse its vertical position to its horizontal position before the paint sags due to gravity yet which is low enough to cause no sagging as a result of centrifugal force.

Disclosed is a coating method involving a coating step step and a drying step, in which the substrate is sprayed with a paint on its surface extending substantially upwardly and downwardly with the paint to form a coat in a thickness thicker than a thickness at which the paint starts sagging in the coating step and the coat formed on the substrate is dried at the drying step by rotating the substrate about its axis extending in a substantially horizontal and longitudinal direction of the substrate for a period of time ranging from the time when the paint coated starts sagging on the surface of the substrate extending substantially upwardly and downwardly to the time when the paint of the coated formed thereon achieves a substantially sagless state, the rotation of the substrate sprayed with the paint thereon being carried out at a speed which is high enough to rotate the substrate from a vertical position to a horizontal position before the paint coated thereon substantially sags due to gravity yet which is low enough so as to cause no sagging as a result of centrifugal force; and a cooling step for cooling the coat formed by spraying the substrate with the paint is provided immediately after the coating step yet before the drying step.

A highly reflective surface coating is formed by spraying a paint on a substrate as a vehicle body in a thickness thicker than a thickness at which the paint sags and rotating the substrate about its horizontal axis at a speed between a lower limit and an upper limit in order to cause no sagging until the paint sprayed is cured to a sagless state. Before the paint is sprayed in that thickness, an edge portion of the substrate is lowered than other portions thereof, thus preventing a mass of the paint from swelling on a top coat at its edge portion and providing a good appearance on the surface coating. The lowering of the edge portion thereof is effected by lowering the substrate itself without any coat or by spraying the edge portion in a film thickness thinner than the other portion thereof. The coat sprayed with a paint containing a volatilizable solvent may be dried through sequential setting and baking steps, while a powder paint sprayed may be baked without setting. The paint containing such a solvent may cause sagging in both the setting and baking steps or only in the setting step. The sagging is prevented by rotating the substrate during the time when the paint is sagging.

A coating method contains a coating step for spraying the surface of a coating substrate paint with a paint and a drying step for drying the paint coated thereon. The paint coated on the substate is then caused to flow or sag artificially within the coat in the drying step by application of an action from the outside at least in one of the coating and drying steps, namely, by heating or vibrating the paint coated thereon. During the flowing or sagging of the paint artificially, the substrate is rotated about its axis extending substantially horizontally in a longitudinal direction of the substrate at a speed which is high enough to rotate the substrate before the paint coated thereon substantially sag due to gravity yet which is low enough so as to cause no sagging as a result of centrifugal force.

The coating method includes the intercoating step for spraying the intercoating paint over a substrate after undercoating, the intercoat drying step for drying the intercoat on the substrate, the overcoating step for spraying the overcoating paint over the dried intercoat on the substrate, and the overcoat drying step for drying the overcoat. In the intercoating step, the intercoating paint is sprayed in such an amount as causing sag, that is, in an amount beyond its sagging threshold value. In the intercoat drying step, the substrate is rotated about its horizontal and longitudinal axis to dry the intercoat.

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Hiroshima, Japan

Yoshio Tanimoto