Back to results
US 4,303,559 AGranted
Process for the reutilization of paint sludges
AssigneeCentro Ricerche Fiat S.p.A.
InventorSergio Trost
Life of this patent
Estimating the term…
Abstract
Aqueous paint sludges containing thermosetting synthetic resins are converted into shaped articles by breaking the sludge into fragments, drying said fragments, grinding said fragments to a size not exceeding 0.6 mm, compacting the resulting particles and heating the resulting body to achieve agglomeration of the particles and thermosetting of the resin. The material thus obtained may be used as building or insulating components.
Claims14
A process for reclaiming aqueous paint sludge containing at least one synthetic thermosetting resin, which comprises the steps of:
- (a) breaking the sludge into particles to obtain distinct, semisolid fragments, of a size not exceeding 1 cm,
- (b) drying these fragments without substantially reducing the thermosetting properties of the resin present therein, to obtain dried fragments having a weight loss not greater than 20% after a heat treatment at 105.degree. C. for 2 hours,
- (c) grinding the dried fragments to obtain ground particles of a size not exceeding 0.6 mm,
- (d) compacting the particles to obtain a coherent, porous, gas-permeable solid, and
- (e) heating the solid to a temperature, and for a time, sufficient to agglomerate the particles and at least partially thermoset the resin contained in said particles.
2 more elements
Dependencies are inferred from the claim text.