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AssigneeOptatech Corporation
InventorsHans Kricheldorf, Andreas Gerken
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A thermotropic main-chain liquid crystalline homo- or copolymer forming a liquid crystalline phase and containing an aromatic monomer with functional groups in ortho- or meta-position. The polymer exhibits both isotropic and anisotropic properties. The present invention also provides a method for the preparation of the present polymers as well as a method of increasing the melt-processibility of polyester-based liquid crystalline polymers comprising the step of incorporating into the polymers 1 to 30 mol-% of, e.g., a ortho-substituted monomer with hydroxyl and/or carboxylic groups.
A thermotropic main-chain liquid crystalline homo- or copolymer forming a liquid crystalline phase, having therein an aromatic monomer with at least one functional group in ortho-position, said polymer is produced by the transesterification of a polyester selected from the group consisting of poly(ethylene terephthalate), poly(butylene terephthalate), poly(ethylene naphthalate), poly(butylene naphthalate), poly(trimethylene terephthalate), poly(trimethylene naphthalate), poly(cyclohexane dimethanolterephthalate) and/or poly(cyclohexane dimethanolnaphthalate) and having entanglements, increased melt strength and isotropic and anisotropic properties, said aromatic monomer being selected from the group consisting of at least one of acetylsalicylic acid, diacetylated catechol, or a derivative thereof.
A method of increasing the melt-processibility of a polyester-based liquid crystalline polymer comprising:
Dependencies are inferred from the claim text.