Poly(9,9'-spirobisfluorenes), their production and their use

US6380445B1 · kind B1 · utility

Assignee

• Vantico Inc. · US

Inventors

• Ralf-Roman Rietz · Kobe, JP
• Wolfgang Wernet · Ludwigshafen, DE

Key dates

• Filing date: May 9, 2000
• Grant date: Apr 30, 2002
• Expiry date: May 9, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Soluble poly(bis-9,9′-fluorenes) comprise identical or different structural repeating units of the formula I, wherethe two R1s are, independently of one another, H, C1-C18alkyl, C6-C14aryl, C7-C15aralkyl, C1-C18alkoxy, R2—(O—CnH2n)m—O—, C1-C18alkylthio, C1-C18dialkylamino, —C(O)OH, —C(O)O—C1-C18alkyl, —C(O)—N(C1-C18alkyl)2, —SO3H, —SO3—C1-C18alkyl, —SO2—N(C1-C18alkyl)2, C1-C17alkyl-C(O)—O— or C1-C17alkyl-C(O)—, R2 is H or C1-C12alkyl, n is from 2 to 6 and m is from 1 to 12.The polymers can be used either alone or in admixture with at least one additional fluorophore whose absorption band overlaps the emission band (fluorescent emission) of the polymer of the formula I as active radiative layer for light-emitting diodes, VDUs and display elements.