US 11,702,514 B2
Universal pigmentary preparations for colouring and reenforcing plastics
Giovanni Broggi, Milan (IT)
Appl. No. 16/344,029
Filed by Giovanni Broggi, Milan (IT)
PCT Filed Oct. 27, 2017, PCT No. PCT/EP2017/077554
§ 371(c)(1), (2) Date Apr. 23, 2019,
PCT Pub. No. WO2018/078072, PCT Pub. Date May 3, 2018.
Claims priority of application No. 102016000109323 (IT), filed on Oct. 28, 2016.
Prior Publication US 2019/0338085 A1, Nov. 7, 2019
Int. Cl. C09D 7/45 (2018.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01); C09D 7/65 (2018.01); C09D 17/00 (2006.01); C08J 3/22 (2006.01); C08J 3/20 (2006.01); C08K 3/013 (2018.01); C08K 5/00 (2006.01)
CPC C08J 3/226 (2013.01) [C08J 3/203 (2013.01); C09D 7/45 (2018.01); C09D 7/68 (2018.01); C09D 7/69 (2018.01); C09D 17/003 (2013.01); C09D 17/008 (2013.01); C08J 2300/22 (2013.01); C08J 2355/02 (2013.01); C08J 2391/06 (2013.01); C08J 2400/22 (2013.01); C08J 2455/02 (2013.01); C08K 3/013 (2018.01); C08K 5/0041 (2013.01)] 18 Claims
 
1. A dry-milled 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, 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 70% by weight of the at least one pigmentary additive with respect to the total weight of the pigmentary preparation,
and wherein the pigmentary preparation is in the form of a) a free-flowing powder having particles with D20 of at least 0.8 microns and D90 up to 5 microns when measured in by a laser particle size analyzer in the dry state at a pressure of 3.5 bar or b) microgranules having granules with D20 of at least 10 microns and D90 up to 1000 microns when measured in a laser particle size analyzer in the dry state at a pressure of 3.5 bar.