The present invention relates to a method for preparing a superabsorbent polymer. The method for preparing a superabsorbent according to the present invention comprises the steps of: polymerizing a monomer composition into a superabsorbent polymer in a polymerization reactor; grinding the obtained superabsorbent polymer; and hydrolyzing the fine particles generated during the process and reusing the same for the monomer composition.

A method is disclosed for recycling broad goods material into a flaked feed material. The broad goods material includes reinforcement fibers and thermoplastic material. The recycling method includes applying heat and pressure to impregnate the reinforcement fibers at a filament level with the thermoplastic material to form an impregnated fiber material. The method also includes cooling the impregnated fiber material, and cutting the cooled impregnated fiber material into flakes to produce the flaked feed material.

Intended for the reuse of paint residues with granulometry below 10 micrometers, the particles of which cannot be electrostatically loaded in order to apply the paint, it consists in the inserting of the residues in sacks with porous walls, which, during a pre-compaction phase permits the through-exit of air contained between the paint particles, and the consequent compaction of the paint, subsequently subjecting said product to a second compaction phase, specifically pouring it into a hopper (1) in which screws (2) determine a forced circulation of the product towards a pair of compaction rollers (3), where the final compaction is produced, and which pour, through a hopper (6) into a mill (7), where the compacted product is ground, acquiring a granulated appearance, the same as the raw material used in the manufacturing of paint-powder, so that, in similar manner to this raw material, it can be subjected to the classical extrusion procedure for re-obtaining paint-powder, now with suitable particle size for its electrostatic loading.

Disclosed is that one coating system of aqueous intermediate-coating paint (20) can employ a plurality of colors of aqueous intermediate-coating paints and easily recycle them without color mixing problems. The method comprises spray-coating an article (50) with aqueous paint in a coating booth, recovering over-spray paint that has not applied on the article in a booth circulating water bath (5), carrying out spray-coating for a certain period of time followed by sending the content of the booth circulating water bath to a concentration tank (7) after finishing a certain term for coating, separating the content with a ultrafiltration device (9) into a concentrated paint having a desired concentration and a filtrate, storing the concentrated paint in a recovering tank (12) for re-using on desire, the spray-coating being conducted using at least two different achromatic color intermediate-coating paints having different lightness, the over-spray paint being recovered mixing together the different achromatic color intermediate-coating paints and subjected to concentration to form a concentrated paint, and the concentrated paint being either re-used as one of achromatic color intermediate-coating paints as it is, or being subjected to lightness adjustment to lower lightness and re-used as one of achromatic color intermediate-coating paints having lower lightness.

Lackierung von Automobilkarosserien mit einer Elektrotauch-Grundierung, einer zweiten Schicht mit einer Dicke von 10 bis 20 µm aus einem Gemisch aus handelsüblichem Basislack und einem Kompensationslack, der 40 bis 80 Gew.-% Bindemittel enthält, einer dritten Schicht aus einem wasserlöslichen Basislack und einer vierten Klarlackdeckschicht sowie Verwendung des wasserverdünnbaren Kompensationslackes in Mischung mit einem handelsüblichen Basislack zur Lackierung von Automobilkarosserien.

Process for recycling of powder coating waste, wherein powder coating waste is moved in a vessel rotating about a rotational axis inclined at an angle of 20 to 70 degrees to the horizontal and is thereby exposed to heat, until powder coating agglomerates with a size of 1 mm to 3 cm or 1 to 10 mm or powder coating pearls with a size of 1 to 10 mm are formed.

There is disclosed apparatus and method for recycling waste paint, for completely removing a bad smell generated in the course of drying up the waste paint and extracting a bad smell from a filler. The method for recycling waste paint comprises the steps of: shaping the waste paint into a cake of a predetermined thickness while removing water from the waste paint using centrifugal force of a dehydrator; drying up and dehydrating the cake-shaped waste paint at about 80°C∼300°C using a twin screw extruding method to remove water; drying up the waste paint dried up at the above step at about 100°C∼300°C using a vacuum dry method to remove remaining water; pulverizing the waste paint dried up by the vacuum dry method into minute powder; separating the pulverized waste paint based upon density; and collecting and discharging dust, vapor, and gas generated during the above steps.