Selective ether cleavage synthesis of liquid crystals

Details Selective ether cleavage synthesis of liquid crystals Selective ether cleavage synthesis of liquid crystals

2006-12-12

2006-12-12

Wu, Shean C (Department: 1756)

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

C252S299010, C528S176000, C528S192000, C560S086000, C585S025000, C585S932000, C585S935000

Reexamination Certificate

active

07147800

ABSTRACT:
A method for making platform molecules comprising: reacting 4-alkoxy benzoyl chloride with R2-hydroquinone under first conditions effective to produce bis 1,4[4-alkoxy-benzoyloxy]-R2-phenylene comprising bis terminal alkoxy groups wherein R2is a bulky organic group; and, subjecting the bis 1,4[4-alkoxy-benzoyloxy]-R2-phenylene to second conditions effective to selectively cleave the bis terminal alkoxy groups to produce a solution comprising complexes comprising diphenolic platform molecules comprising bis terminal hydroxyl groups, the second conditions also being effective to precipitate the complexes out of the solution.

REFERENCES:
patent: 4099856 (1978-07-01), Weissflog et al.
patent: 4201856 (1980-05-01), Jackson Jr.
patent: 4215033 (1980-07-01), Bowen
patent: 4519936 (1985-05-01), Demus et al.
patent: 4539048 (1985-09-01), Cohen
patent: RE32073 (1986-01-01), Randklev
patent: 4588756 (1986-05-01), Bowen
patent: 4623738 (1986-11-01), Sugerman
patent: 4659751 (1987-04-01), Bowen
patent: 4663147 (1987-05-01), DePrince
patent: 4753652 (1988-06-01), Langer
patent: 4914221 (1990-04-01), Winkler et al.
patent: 4964911 (1990-10-01), Ibsen
patent: 4978640 (1990-12-01), Kelly
patent: 5024850 (1991-06-01), Broer
patent: 5030608 (1991-07-01), Schubert
patent: 5057018 (1991-10-01), Bowen
patent: 5064877 (1991-11-01), Nass
patent: 5073294 (1991-12-01), Shannon
patent: 5202053 (1993-04-01), Shannon
patent: 5276068 (1994-01-01), Waknine
patent: 5308886 (1994-05-01), Masuhara
patent: 5328947 (1994-07-01), Taguchi
patent: 5334625 (1994-08-01), Ibsen et al.
patent: 5372796 (1994-12-01), Wellinghoff
patent: 5401528 (1995-03-01), Schmidt
patent: 5472797 (1995-12-01), Yajima
patent: 5486548 (1996-01-01), Podszun
patent: 5502087 (1996-03-01), Tateosian
patent: 5556931 (1996-09-01), Imura
patent: 5563230 (1996-10-01), Hsu
patent: 5622648 (1997-04-01), Parri et al.
patent: 5624976 (1997-04-01), Klee et al.
patent: 5654471 (1997-08-01), Zahn
patent: 5663214 (1997-09-01), Okada
patent: 5670583 (1997-09-01), Wellinghoff
patent: 5676879 (1997-10-01), Heynderickx et al.
patent: 5695681 (1997-12-01), Siemensmeyer
patent: 5730601 (1998-03-01), Bowman
patent: 5804097 (1998-09-01), Delavier
patent: 5808108 (1998-09-01), Chappelow et al.
patent: 5811504 (1998-09-01), Shiota et al.
patent: 5833880 (1998-11-01), Siemensmeyer
patent: 5834532 (1998-11-01), Yamamoto
patent: 5852248 (1998-12-01), Chadwick
patent: 5859089 (1999-01-01), Qian
patent: 5865623 (1999-02-01), Suh
patent: 5871665 (1999-02-01), Coates
patent: 5886064 (1999-03-01), Rheinberger
patent: 5897885 (1999-04-01), Petticrew
patent: 5910273 (1999-06-01), Thiel
patent: 5911911 (1999-06-01), Keller
patent: 5955514 (1999-09-01), Huang
patent: 5989461 (1999-11-01), Coates
patent: 5998499 (1999-12-01), Klee
patent: 6022404 (2000-02-01), Ettlinger
patent: 6027816 (2000-02-01), Ono
patent: 6031015 (2000-02-01), Ritter
patent: 6060042 (2000-05-01), Schuhmacher
patent: 6087816 (2000-07-01), Volk
patent: 6090308 (2000-07-01), Coates
patent: 6117920 (2000-09-01), Jolliffe
patent: 6136225 (2000-10-01), Meyer
patent: 6144428 (2000-11-01), Schadt
patent: 6194481 (2001-02-01), Furman
patent: 6204302 (2001-03-01), Rawls
patent: 6217792 (2001-04-01), Parri
patent: 6217955 (2001-04-01), Coates
patent: 6258974 (2001-07-01), Wellinghoff
patent: 6291035 (2001-09-01), Verrall
patent: 6303050 (2001-10-01), Dannenhauer et al.
patent: 6335462 (2002-01-01), Etzbach
patent: 6410765 (2002-06-01), Wellinghoff
patent: 6414092 (2002-07-01), Coates
patent: 6417244 (2002-07-01), Wellinghoff
patent: 6649230 (2003-11-01), Seiberle
patent: 6695617 (2004-02-01), Wellinghoff
patent: 6696585 (2004-02-01), Wellinghoff
patent: 6699405 (2004-03-01), Prechtl et al.
patent: 6743936 (2004-06-01), Wellinghoff
patent: 2002/0013382 (2002-01-01), Furman
patent: 2002/0036285 (2002-03-01), Prechtl, et al.
patent: 2002/0177727 (2002-11-01), Wellinghoff
patent: 2003/0036609 (2003-02-01), Wellinghoff
patent: 2003/0055280 (2003-03-01), Wellinghoff
patent: 2003/0125435 (2003-07-01), Norling
patent: 2003/0168633 (2003-09-01), Wellinghoff
patent: 2004/0144954 (2004-07-01), Wellinghoff
patent: 2004/0199004 (2004-10-01), Wellinghoff
patent: 2181507 (1997-01-01), None
patent: 10016524 (2001-10-01), None
patent: 0159887 (1985-10-01), None
patent: 0 242 278 (1987-10-01), None
patent: 0722992 (1996-07-01), None
patent: 0754675 (1997-01-01), None
patent: 0 869 112 (1998-03-01), None
patent: 1142863 (2001-10-01), None
patent: 2297549 (1996-08-01), None
patent: 2330139 (1999-04-01), None
patent: 05178794 (1993-07-01), None
patent: 08-157597 (1996-06-01), None
patent: WO 79/01040 (1979-11-01), None
patent: WO 92/16183 (1992-10-01), None
patent: WO 93/22397 (1993-11-01), None
patent: WO 94/16129 (1994-07-01), None
patent: WO 94/24052 (1994-10-01), None
patent: WO 97/14674 (1997-04-01), None
patent: WO 98/31008 (1998-04-01), None
patent: WO 98/23580 (1998-06-01), None
patent: WO 99/17716 (1999-04-01), None
patent: WO 02/070543 (2002-09-01), None
Dewar, et al., Factors influencing the stabilities of nematic liquid crystals, J. Am. Chem. Soc., 97:23, 1975, pp. 6658-6666.
Ellsworth, et al., Mutually interpenetrating inorganic-organic networks. New Routes into nonshrinking sol-gel composite materials, J. Am. Chem. Soc., 1991, 113, pp. 2756-2758.
Galli, et al., Thermotropic Poly(ester-B-sulfide)s. A new polymer series containing the p-phenylene di(p-oxybenzoate) unit, Polymer Bulletin 21, pp. 563-569, 1989.
Hikmet, et al., Effect of the orientation of the ester bonds on the properties of three isomeric liquid crystal diacrylates before and after polymerization, Macromolecules, 1995, 28, 3313-3327.
Landry, et al., In situ polymerizatio of tetraethoxysilane in poly (methyl methacrylate): morphology and dynamic mechanical properties, Polymer, 1992, vol. 33, No. 7, 1486-1495.
Lee, et al., Phase behavior of liquid crystalline polymer/model compound mixtures: theory and experiment, Macromolecules 1994, 27, 3955-3962.
Node, et al., Hard acid and soft nucleophile system. 2.1 Demethylation of methyl ethers of alcohol and phenol with an aluminum halide-thiol system, J. Org. Chem., 1980, 45, 4275-4277.
Rittner, Nanostructured materials: a technical-market analysis, Business Communications Co., Inc.
Schmidt, et al., Organically modified ceramics and their applications, J. Non-Cryst. Sol. 121, 428-435, 1990.
Schmidt, et al., New Liquid Crystalline di-and tetra- acrylates for network formation, Liquid Crystals, 2001, vol. 28, No. 11, 1611-1621.
Wedler, et al., Vitrification in low-molecular-weight mesogenic compounds, J. Mater. Chem. 1991, 1(3), 347-356.
Wei, et al., Synthesis of New Organic-inorganic hybrid glasses, Chemistry of Materials, vol. 2, No. 4, 1990, 337-339.
Wellinghoff, et al., Tantalum Oxide-Polymer composites, The Int'l Symposium, Hyatt O'Hare Regency, Chicago, IL, USA, 1993, 141-154.
Choi, Rheological studies on sterically stabilized model dispersions of uniform colloidal spheres. II. Steady-shear viscosity, J. Colloid Interface Science., Sep. 1986, pp. 101-113, vol. 113(1), Academic Press, Inc.
Condon, Reduction of composite contraction stress through non-bonded microfiller particles, Dental Materials, Jul. 1998, pp. 256-260, vol. 14.
Hellwig, Influence of an incremental application technique on the polymerization of two light-activated dental composite filling materials, Dtsch. Zahnaerztl Z., 1991, pp. 270-273, vol. 46.
Hikmet, Anisotropic polymerization shrinkage behavior of liquid-crystalline diacrylates, Polymer, 1992, pp. 89-95, vol. 33(1), Butterworth-Heinemann Ltd.
Norling et al, Polymerizable nematic liquid crystal monomers for reduced shrinkage restorative resins, Proc. 17th Southern Biomed. Eng. Conf., 1998, p. 120.
Liu, Constant-volume polymerization of composites by addition of ammonia-modified montmorillonite, American Journal of Dentistry, Apr. 1990, pp. 44-50, vol. 3(2).
Millich, Elements of light-cured epoxy based dental polymer systems, J. Dent. Res., Apr. 1998, pp. 603-608, vol. 77(4).
Rawls et al, Low Shrinkage resins from liquid crystal diacrylate monomers, ACS Polymer Preprints, Sep. 1997, pp. 16

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