Vectra

Vectra

Vectra is an aromatic polyester condensate derived from 2,6-dihydroxynaphthalene. It is used in various applications such as manufacturing door panels, package trays, and other automotive components. Vectra LCP resin provides high stiffness in thin wall sections and a low coefficient of thermal expansion, making it suitable for use in high-temperature environments. Additionally, Vectra has a high LOI value, making it a flame-retardant material.From: Plastics Technology Handbook [2017], Impact properties of thermoplastic composites [2018], Thermoplastic Materials [2019], Synthesis and properties of wholly aromatic phosphorus-containing thermotropic liquid crystal copolyesters with excellent fibre formation ability [2021]

Polymers in Special Uses

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Published in Manas Chanda, Plastics Technology Handbook, 2017

Manas Chanda

A second range of LCPs were introduced by Hoechst Celanese under the trade name Vectra. Vectra is an aromatic polyester condensate derived from 2,6-dihydroxynaphthalene. Its main advantages are its fast cycling and ease of processing, the melt temperature for both injection and extrusion grades being typically about 285°C.

A sustainable preparative-scale chemo-enzymatic synthesis of 6-hydroxy-5,7-dimethoxy-2-naphthoic acid (DMNA) from sinapic acid

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Published in Green Chemistry Letters and Reviews, 2022

Amandine L. Flourat, Nour Zeaiter, Erwan Vallée, V. P. Thinh Nguyen, Sami Fadlallah, Florent Allais

6-Hydroxy-5,7-dimethoxy-2-naphthoic acid (DMNA) was first assumed as a natural product found in the alkaline extract of the heartwood of Ulmus thomasii Sarg (Figure 1) (7). However, the natural occurrence of this compound is questionable due to the observation of Charlton and Lee who suggested that DMNA is an oxidized product of SA under strongly alkaline conditions (8). Interestingly, the structure of DMNA shows a high similarity to that of 6-hydroxy-2-naphthoic acid (NA) (Figure 1), a petroleum-based chemical commonly used for the production of the high-value-added liquid crystal polymer Vectra® (9–11). Moreover, the antimicrobial activity of some DMNA analogs has been reported (12, 13). Considering the aforementioned data, we believe that DMNA could be a potential renewable building block for biobased chemicals and materials that can replace other NA analogs issued from limited fossil resources.

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Polymers in Special Uses

A sustainable preparative-scale chemo-enzymatic synthesis of 6-hydroxy-5,7-dimethoxy-2-naphthoic acid (DMNA) from sinapic acid