摘要:
The present invention provides a novel liquid crystalline polyester comprising structural units represented by the following general formulae A, B, C and D : or and where X and Y are each independently H, Cl, Br or an alkyl group having 1 to 4 carbon atoms, the molar ratio of A/B is in the range from 49/1 to 20/30 and that of C/D is in the range from 10/40 to 45/5.
摘要:
Des copolyesters aptes à la mise en oeuvre par fusion et présentant une stabilité thermique améliorée sont préparés à partir de 1,4-butanediol, de faibles quantités d'acide trans-4,4'-stilbénédicarboxylique et d'un acide dicarboxylique choisi parmi l'acide téréphtalique, l'acide isophtalique, et des mélanges de ceux-ci. Sont également décrites des compositions renfermant ce polyester et divers autres polymères, retardateurs de flamme, charges et agents de renforcement.
1) a pair of substrates including a first transparent substrate having thereon a transparent electrode and a polymeric alignment layer, and a second transparent substrate having thereon a transparent electrode and a polymeric alignment layer; 2) a ferroelectric liquid crystal material disposed between the pair of substrates; and 3) at least one of the first or second substrates further comprising a color filter array; and wherein the polymeric alignment layer is a crosslinked polyester which is derived from 1,4-phenylene bis(2-acrylic acid) and at least one aliphatic glycol that does not contain any aromatic dibasic acid component.
摘要:
The present invention concerns the use of a compound having the following formula (I): for the preparation of a polymer. The present invention also concerns the polymers obtained from the polymerization of compound of formula (I), and their processes of preparation.
摘要:
An object of the present invention is to provide a lubricant which has excellent lubrication performance and is able to exhibit excellent lubrication performance even when under extreme pressure conditions.The present invention relates to a complex polyester composition containing polyester obtained by condensing polyhydric alcohol having at least two hydroxyl groups, a dicarboxylic acid having 44 carbon atoms, and monohydric alcohol. Further, the present invention relates to a lubricant composition containing the complex polyester composition, and a lubricant and a production method for a complex polyester composition.
摘要:
Novel, fusible, liquid crystalline polyesters having lateral propargyloxy groups which undergo self-crosslinking in the liquid crystal phase at above their melting point are described. The polyesters are based on 2,5-bis (propargyloxy) terephtalic acid and 4,4'-dihydroxybiphenyl. The novel fusible polyesters may be used, for example, for materials having reinforcing properties.
(a) einen Polyester enthaltend wiederkehrende Struktureinheiten der Formel (I) worin Z für einen Rest der Formeln (IIa)-(IIh) steht worin Y für eine direkte Bindung, C₁-C₂₀-Alkylen, Phenylen, -CH₂-C₆H₄-CH₂-, Cyclopentylen oder Cyclohexylen steht und R₁ und R₂ unabhängig voneinander Wasserstoff, Methyl oder Ethyl bedeuten, mit der Massgabe, dass R₁ und R₂ nicht gleichzeitig Wasserstoff sind, und (b) eine unter Einwirkung von aktinischer Strahlung säurebildende Substanz,
bilden eine hochempfindliche Positiv-Photoresist-Formulierung mit hohem Auflösungsvermögen, die für die DUV-Lithographie und insbesondere zur Herstellung von integrierten Schaltkreisen geeignet ist.