The present invention is directed to a Method for decolorizing a colored synthetic and/or not-synthetic polar-polymer material, comprising the steps:
exposing the colored synthetic and/or not-synthetic polar-polymer material to a polar solvent at a temperature of about ≥ 30 °C to about ≤ 200 °C,
wherein the polar solvent comprises and/or is exposed to at least one polar decoloring agent for absorbing and/or adsorbing chemical modification of the color from the colored synthetic and/or not-synthetic polar-polymer material;
wherein the colored synthetic and/or not-synthetic polar-polymer material to be decolorized comprises:
- at least one organic aromatic coloring agent having a molecular weight Mw in the range of about ≥ 250 g/mol to about ≤ 550 g/mol, wherein the organic aromatic coloring agent is not a chemical reactive organic aromatic coloring agent that forms a chemical covalently bound;
i) at least one synthetic and/or not-synthetic polar-polymer having a Mw of about ≥ 1000 g/mol, or
ii) at least one synthetic and/or not-synthetic non-polar-polymer having a Mw of about ≥ 1000 g/mol; wherein the synthetic and/or not-synthetic non-polar-polymer comprises in addition:
- at least one synthetic and/or not-synthetic polar-polymer having a Mw of about ≥ 1000 g/mol, and/or
- at least one synthetic and/or not-synthetic polar-oligomer having a Mw of about ≥ 600 g/mol and < 1000 g/mol, and/or
- at least one synthetic and/or not-synthetic polar-additive having a Mw of about ≥ 70 and < 600 g/mol;
wherein the polar-additive is selected different to the organic aromatic coloring agent having a molecular weight Mw in the range of about ≥ 250 g/mol to about ≤ 550 g/mol.
本发明涉及一种使有色合成和/或非合成极性聚合物材料脱色的方法,包括以下步骤:
将有色合成和/或非合成极性聚合物材料暴露于极性溶剂中,温度约≥30 ℃至约≤200 ℃、
其中极性溶剂包括和/或接触到至少一种极性脱色剂,用于吸收和/或吸附有色合成和/或非合成极性聚合物材料的
化学改性颜色;
其中待脱色的有色合成和/或非合成极性聚合物材料包括
- 至少一种有机芳香族
着色剂,其分子量 Mw 在约≥ 250 g/mol 至约≤ 550 g/mol 范围内,其中有机芳香族
着色剂不是形成
化学共价结合的
化学反应性有机芳香族
着色剂;
i) 至少一种合成和/或非合成极性聚合物,其 Mw 约≥ 1000 g/mol,或
至少一种合成和/或非合成非极性聚合物,其 Mw 约≥ 1000 g/mol;其中合成和/或非合成非极性聚合物还包括
- 至少一种 Mw 约≥ 1000 g/mol 的合成和/或非合成极性聚合物,和/或
- 至少一种合成和/或非合成极性异构体,其 Mw 约≥ 600 克/摩尔且 < 1000 克/摩尔,和/或
- 至少一种合成和/或非合成极性添加剂,其 Mw 约≥ 70 和 < 600 g/mol;
其中所选的极性添加剂不同于分子量 Mw 在约≥ 250 克/摩尔至约≤ 550 克/摩尔范围内的有机芳香
着色剂。