Low phosphorous low color polyamides
The present invention provides a low color polyamide composition comprising: a polyamide; a phosphorus-containing compound; and a carboxylic acid wherein the polyamide composition contains from 25 to 50 ppm phosphorus wherein the carboxylic acid is present at a concentration of from 1, 200 to 1,800...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The present invention provides a low color polyamide composition comprising: a polyamide; a phosphorus-containing compound; and a carboxylic acid wherein the polyamide composition contains from 25 to 50 ppm phosphorus wherein the carboxylic acid is present at a concentration of from 1, 200 to 1,800 ppm and is selected from the group consisting of acetic acid, propionic acid, benzoic acid, phthalic acid and succinic acid and wherein the polyamide composition has a yellowness index of from-4 to-9, and articles comprising the composition. The polyamide composition initially exhibits a low color and continues to exhibit a low color over time.
本发明提供低色度的聚酰胺组合物,它包括:聚酰胺;含磷化合物;和羧酸,其中该聚酰胺组合物含有25至50ppm磷,其中羧酸以1,200至1,800ppm的浓度存在,并且选自乙酸,丙酸、苯甲酸、邻苯二甲酸和琥珀酸,并且其中该聚酰胺组合物具有-4至-9的黄度指数,以及包含该组合物的制品。所述聚酰胺组合物最初显示出低色度和随着时间流逝继续显示出低色度。 |
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