Novel mesogenic amines and liquid-crystalline-side-group polymers incorporating same
Patent 5093471 Issued on March 3, 1992. Estimated Expiration Date: 
December 7, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 7, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3600060 3714120 3872050 Preparation of liquid crystal containing polymeric structure Liquid crystal devices Preparation of liquid crystal containing polymeric structure Liquid crystalline compositions Amine-substituted liquid crystal compositions Epoxy resin curing agents Encapsulated liquid crystal and method InventorAssigneeApplicationNo. 447582 filed on 12/07/1989US Classes:528/418, Reactant contains two or more rings each of said rings having a single oxygen and two carbon atoms252/299.01, LIQUID CRYSTAL COMPOSITIONS525/521, Solid polymer or SICP derived from at least one ketone reactant and at least one aldehyde or aldehyde derivative reactant528/117, Five-membered heterocyclic ring contains at least one nitrogen atom as a ring member528/118, Six-membered heterocyclic ring contains at least one nitrogen atom as a ring member528/119, Non-1,2-epoxy or nonphenolic reactant contains one or more nitrogen atoms528/121, Nitrogen reactant contains at least one amino-nitrogen atom528/124, Nitrogen reactant having at least one amino-nitrogen atom contains at least one aryl group528/406, Heterocyclic reactant contains at least two heterocyclic rings having oxygen, selenium or tellurium as ring members528/407, Reactant which is devoid of a heterocyclic ring containing oxygen, selenium or tellurium as ring atoms, contains at least one nitrogen atom528/422NITROGEN-CONTAINING REACTANTExaminersPrimary: Maples, John S.Assistant: Treanor, Richard Attorney, Agent or FirmForeign Patent References
International ClassesB32B 015/08B32B 003/12 C09K 019/52 AbstractNovel mesogenic amine curing agent for reactive monomers, such as epoxy resins and diisocyanates, comprises a mesogenic moiety, a primary amine, and a flexible alkyl spacer connected between the mesogenic moiety and the primary amine and wherein the alkyl spacer is a saturated, linear alkyl group having from about one to about twenty carbon atoms. Novel mesogenic amine has the formula: ##STR1## where M is --O--, ##STR2## or --CH2 --, where R is --NO2 or --CN, andwhere x is 1 to 20.Novel mesogenic amine has a labile group subject to cross-linking and the formula: ##STR3## where K is ##STR4## where L is ##STR5## where M is --o--, ##STR6## or --CH2 --, where Z is cinnamate, an alkene having from one to ten carbons, an isocyanate, an alkoxy, or an alcohol having from one to ten carbons,where T is a cyano, a nitro or an alkyl group having from about one to ten carbons, andwhere X is 1 to 20.Novel mesogenic amine has a cinnamate group subject to cross-linking and the formula: ##STR7## where R is --CN or --NO2 ; and where X is 1 to 20.Novel mesogenic amine has a formula: ##STR8## where R is --CN or --NO2 ; and where x is 1 to 20.Novel mesogenic amine has a formula: ##STR9## where R is --CN or --NO2 ; and where x is 1 to 20.Novel mesogenic amine has a formula: ##STR10## where M is --o--, ##STR11## --CH2 --; where T is --CN, --NO2 or C1-10 ;where A is a reactive group capable of cross-linking; andwhere x is 2 to 20.Reactive monomers having functionality of two or greater and mixtures thereof are cured with novel mesogenic amine curing agents or mixtures thereof.Novel liquid-crystalline-side-group polymers with side group comprises a mesogenic moiety and a flexible alkyl spacer connecting the mesogenic moiety to the polymer backbone, and method for preparation thereto.Blending of mesogenic amine curing agents and reactive monomers allow properties of the liquid crystal polymer to be tailored for specific applications, e.g., PCLC films.Other References
Field of SearchLIQUID CRYSTAL COMPOSITIONSReactant contains two or more rings each of said rings having a single oxygen and two carbon atoms NITROGEN-CONTAINING REACTANT Reactant which is devoid of a heterocyclic ring containing oxygen, selenium or tellurium as ring atoms, contains at least one nitrogen atom Heterocyclic reactant contains at least two heterocyclic rings having oxygen, selenium or tellurium as ring members Five-membered heterocyclic ring contains at least one nitrogen atom as a ring member Six-membered heterocyclic ring contains at least one nitrogen atom as a ring member Non-1,2-epoxy or nonphenolic reactant contains one or more nitrogen atoms Nitrogen reactant contains at least one amino-nitrogen atom Nitrogen reactant having at least one amino-nitrogen atom contains at least one aryl group | |
