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A marking composition for placing a temporarily visible mark on a surface. The composition includes a paint base and a pigmented colorant. The pigmented colorant is dispersed within the paint base, and has characteristics that cause the mark to progressively become substantially invisible upon expos

A marking composition for placing a temporarily visible mark on a surface. The composition includes a paint base and a pigmented colorant. The pigmented colorant is dispersed within the paint base, and has characteristics that cause the mark to progressively become substantially invisible upon exposure to UV light. Additives, such as UV absorbers and anti-oxidants may be included to alter the rate at which the mark becomes invisible. The pigmented colorant may be a dispersion of dyed melamine-toluenesulfonamide-formaldehyde polymer in a mixture of alkyl based resins and aliphatic hydrocarbons. The colorant may be about 2 to 30 parts by weight of the composition.

대표청구항 ▼

A marking composition for placing a temporarily visible mark on a surface. The composition includes a paint base and a pigmented colorant. The pigmented colorant is dispersed within the paint base, and has characteristics that cause the mark to progressively become substantially invisible upon expos

A marking composition for placing a temporarily visible mark on a surface. The composition includes a paint base and a pigmented colorant. The pigmented colorant is dispersed within the paint base, and has characteristics that cause the mark to progressively become substantially invisible upon exposure to UV light. Additives, such as UV absorbers and anti-oxidants may be included to alter the rate at which the mark becomes invisible. The pigmented colorant may be a dispersion of dyed melamine-toluenesulfonamide-formaldehyde polymer in a mixture of alkyl based resins and aliphatic hydrocarbons. The colorant may be about 2 to 30 parts by weight of the composition. downstream portions of the hose for maintaining the vacuum in the chamber, a first vacuum source for applying vacuum to the vacuum chamber acting along the outer side of the hose, and a second vacuum source for applying a vacuum acting on the inner side of the hose. 16. A device for degassing plastic melts comprising a melt nozzle which has an inlet connection for connecting to a melt supply and a melt outlet opening, a degassing chamber defined by substantially gas-impermeable walls which communicates with a vacuum source and which opens into a discharge opening for a sealed connection to a melt processing system, the melt outlet opening of the nozzle extending into the degassing chamber, the melt outlet opening of the nozzle being configured as a slit of a length which is a multiple of its width, the slit communicating over its entire periphery with the vacuum source.