Free-flowing polyamide molding compounds and blends

US5102935A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Detlef Heinz · Krefeld, DE
• Harald Pielartzik · Pittsburgh, US
• Aziz El-Sayed · Leverkusen, DE
• Rolf-Volker Meyer · Krefeld, DE
• Martin Wandel · Dormagen, DE
• Peter-Roger Nyssen · Dormagen, DE

Key dates

• Filing date: Sep 5, 1989
• Grant date: Apr 7, 1992
• Expiry date: Sep 5, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L77/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to new, free-flowing polyamide molding compounds and blends, characterized in that they are prepared by mixing of polyamides known per se in the melt with low molecular weight, liquid-crystalline esters and/or ester amides corresponding to formula (I) and/or liquid-crystalline, oligomeric esters and/or ester amides corresponding to formula (II) and, optionally, other additives, at least one polymeric blending component being used as a further additive in the case of polyamide blends, and to the use of these liquid-crystalline (LC) additives I and/or II as flow promoters in polyamide molding compounds and blends and to a process for the production of the new polyamide molding compounds and blends. The invention also relates to the new oligomeric esters and/or ester amides corresponding to formula (II).