US 12,012,496 B2
Method for the manufacture of a colored polymer composition
Pieter Jan Antoon Janssen, Geleen (NL); Tamara Marijke Eggenhuisen, Geleen (NL); Abraham Johan Van Veen, Geleen (NL); and Joshua Arie Van Den Bogerd, Geleen (NL)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen Op Zoom (NL)
Appl. No. 17/059,651
Filed by SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
PCT Filed May 24, 2019, PCT No. PCT/EP2019/063507
§ 371(c)(1), (2) Date Nov. 30, 2020,
PCT Pub. No. WO2019/233791, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 18175962 (EP), filed on Jun. 5, 2018.
Prior Publication US 2021/0214519 A1, Jul. 15, 2021
Int. Cl. C08K 3/013 (2018.01); C08J 3/00 (2006.01); C08J 3/20 (2006.01); C08J 3/22 (2006.01); C08K 5/11 (2006.01); C08K 5/3472 (2006.01); C08K 5/524 (2006.01); C08L 69/00 (2006.01)
CPC C08K 3/013 (2018.01) [C08J 3/005 (2013.01); C08K 5/11 (2013.01); C08K 5/3472 (2013.01); C08K 5/524 (2013.01); C08L 69/00 (2013.01); B29K 2995/002 (2013.01); C08J 3/20 (2013.01); C08J 3/203 (2013.01); C08J 3/22 (2013.01); C08J 3/223 (2013.01); C08J 2369/00 (2013.01)] 8 Claims
 
1. A method for the manufacture of a colored polymer composition comprising a polymer, a release agent and a colorant, the method comprising the steps of
feeding a solid form of a release agent composition comprising said release agent and said colorant to a feed section of a melt mixing device, and
separately feeding said polymer to said melt mixing device and mixing said release agent composition and said polymer in said melt mixing device at a temperature above the melting temperature of said polymer, wherein
said colorant is a pigment, or a dye which is soluble in said release agent,
said polymer composition comprises polycarbonate, and
the release agent consists of penta-erythritol tetra stearate, glycerol monostearate, glycerol tristearate or a mixture thereof,
wherein the composition does not comprise carbon based pigments,
wherein the release agent composition comprises
 60 to 99 wt. % of the release agent based on the weight of the release agent composition;
0.001 to 0.1 wt. % of the colorant based on the weight of the release agent composition; and
0 to 40 wt. % of a UV stabilizer based on the weight of the release agent composition; and
wherein the polymer comprises 90 to 100 wt. % of a polycarbonate or a mixture of at least two aromatic polycarbonates based on the weight of the polymer.