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US 2019/0338085 A1Published application
Universal Pigmentary Preparations For Colouring And Reenforcing Plastics
OwnerGiovanni BROGGIinventor
Life of this patent
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Abstract
The invention concerns a pigmentary preparation having universality of use in tinting plastics.
Claims29
A pigmentary preparation comprising:
- at least one dispersing-wetting agent selected from the group consisting of wax-based powdered processing additives with pigment-affinic groups, acidic polyester based additives with pigment-affinic groups, polyethers modified with groups of high pigment affinity, copolymers of styrene and polyethers, amides of maleic acid, amphiphilic copolymers, modified polyacrylate with groups of high pigment affinity, polyester based block copolymers, high molecular weight polyurethane polymers, polyester-polyamine-polyolefin terpolymers, and modified polysiloxanes with epoxy or urethane groups, the at least one dispersing-wetting agent having a melting point in the range 50-150° C.;
- and
- at least one pigmentary additive selected from the group consisting of inorganic pigments, organic pigments, carbon black and dyes, wherein
- the particle diameter D50 (by number) of the at least one pigmentary additive in the pigmentary preparation is the range from 0.5 to 3.5 μm, and
- the pigmentary preparation comprises at least 60% by weight of the at least one pigmentary additive with respect to the total weight of the pigmentary preparation.
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A method of manufacturing a pigment preparation, comprising:
- introducing into a mill apparatus at least one dispersing-wetting agent selected from the group consisting of wax-based powdered processing additive with pigment-affinic groups, acidic polyester based additive with pigment-affinic group, modified polyether with groups of high pigment affinity, copolymers of styrene and polyethers, amides of maleic acid, amphiphilic copolymers, modified polyacrylate with groups of high pigment affinity, polyester based block copolymer, and high molecular weight polyurethane, polyester-polyamine-polyolefin terpolymers, and modified polysiloxanes with epoxy or urethane groups, having said one dispersing-wetting agent a melting point in the range from 50-150° C., and at least one pigmentary additive selected from the group consisting of inorganic pigment, organic pigment, carbon black and dyes, the mill apparatus comprising at least two rotors;
- mixing and milling the dispersing-wetting agent and the at least one pigmentary additive with one another to form the pigmentary preparation, wherein the average peripheral speed of the mill apparatus is from 5-50 m/s;
- and
- recovering the pigmentary preparation, the pigmentary preparation comprising at least 60% by weight of the at least one pigmentary additive.
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Dependencies are inferred from the claim text.