摘要:
A method for reducing the amount of aliphatic solvent needed for maintaining aminoalkyllithium initiators in solution comprising the step of combining at least one aminoalkyllithium compound with a second, dissimilar lithioamine.
摘要:
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Z--O--C(R.sup.1 R.sup.2 R.sup.3) wherein M is an alkali metal; Z is a branched or straight chain hydrocarbon group which contains 3-25 carbon atoms, optionally containing aryl or substituted aryl groups; and R.sup.1, R.sup.2, and R.sup.3 are independently selected from hydrogen, alkyl, substituted alkyl groups containing lower alkoxy, lower alkylthio, and lower dialkylamino groups, aryl or substituted aryl groups containing lower alkoxy, lower alkylthio, and lower dialkylamino groups, and their employment as initiators in the anionic polymerization of olefin containing monomers in an inert, hydrocarbon solvent comprising reacting an omega-protected-1-haloalkyl with lithium metal dispersion having a particle size between 10 and 300 millimicrons in size, at a temperature between 35.degree. and 130.degree. C. in an alkane solvent containing 5 to 10 carbon atoms.
摘要翻译:一种制备以下一般结构的单官能醚引发剂的烃溶液的方法:M-Z-O-C(R 1 R 2 R 3)其中M为碱金属; Z是含有3-25个碳原子的支链或直链烃基,任选含有芳基或取代的芳基; 并且R 1,R 2和R 3独立地选自氢,烷基,含有低级烷氧基,低级烷硫基和低级二烷基氨基的取代烷基,含有低级烷氧基,低级烷硫基和低级二烷基氨基的芳基或取代芳基, 作为在惰性烃溶剂中含烯烃单体的阴离子聚合中的引发剂,包括使ω-保护的1-卤代烷基与尺寸为10-300毫微米的锂金属分散体在35℃和130℃之间的温度下反应 在含有5至10个碳原子的烷烃溶剂中。
摘要:
Disclosed are compounds suitable for use as raw materials which enable cis-olefin compounds useful as physiologically active substances such as the sex pheromones of various insects, or as intermediates for the synthesis thereof to be prepared on an industrial scale at a reasonable cost, and processes for the preparation of cis-olefin compounds by using the same. For this purpose, novel compounds (i.e., 1-halo-cis-3-tetradecenes) of the general formula (I) CH.sub.3 (CH.sub.2).sub.9 CH.dbd.CH(CH.sub.2).sub.2 X (I) wherein X is a halogen atom, are used as raw materials for the preparation of cis-olefin compounds.
摘要:
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Q.sub.n --Z--OA(R.sup.1 R.sup.2 R.sup.3) wherein M is defined as an alkali metal, selected from the group consisting of lithium, sodium and potassium, Q is a saturated or unsaturated hydrocarbyl group derived by incorporation of a compound selected from the group consisting of conjugated diene hydrocarbons and alkenylsubstituted aromatic hydrocarbons; Z is a branched or straight chain hydrocarbon group which contains 3-25 carbon atoms, optionally containing aryl or substituted aryl groups; A is an element selected from carbon and silicon; R.sup.1, R.sup.2, and R.sup.3 are independently selected from hydrogen, alkyl, substituted alkyl groups containing lower alkyl, lower alkylthio, and lower dialkylamino groups, aryl or substituted aryl groups containing lower alkyl, lower alkylthio, and lower dialkylamino groups, and n is an integer from 1 to 5, monofunctional ethers produced by the process, use of the initiators in a polymerization process and polymers produced by the polymerization process.
摘要翻译:一种制备以下一般结构的单官能醚引发剂的烃溶液的方法:M-Qn-Z-OA(R1R2R3)其中M定义为碱金属,选自锂,钠和钾,Q 是通过引入选自共轭二烯烃和烯基取代的芳族烃的化合物衍生的饱和或不饱和烃基; Z是含有3-25个碳原子的支链或直链烃基,任选含有芳基或取代的芳基; A是选自碳和硅的元素; R 1,R 2和R 3独立地选自氢,烷基,含有低级烷基,低级烷硫基和低级二烷基氨基的取代烷基,含有低级烷基,低级烷硫基和低级二烷基氨基的芳基或取代芳基,n是 1至5的整数,通过该方法产生的单官能醚,在聚合方法中使用引发剂和通过聚合方法制备的聚合物。
摘要:
Disclosed is a dichroic crystal including at least one member selected from the group consisting of phtharocyanine, a phtharocyanine derivative, phtharocyanine with a central metal introduced therein, a phtharocyanine derivative with a central metal introduced therein, and iodine. It is precipitated when the iodine is added to a solution containing the member, and it includes the iodine in a form of I.sub.3.sup.- and I.sub.5.sup.- ions. It not only has a high dichroic property but also superb heat resistance and weatherability, so that it is applicable to suspended particles display devices used in severe environments.
摘要:
An anionic polymerization initiator includes a carbon-lithio salt of the adduct of a cyclic secondary amine with a conjugated diene. A method of preparing an anionic polymerization initiator includes reacting an excess of a cyclic secondary amine with a conjugated diene to form an adduct; and, reacting the adduct with an organolithium compound. A method of preparing a polymer includes forming a solution of one or more anionically polymerizable monomers in a hydrocarbon solvent; and, polymerizing the monomer with an anionic polymerization initiator comprising a carbon-lithio salt of the adduct of a cyclic secondary amine with a conjugated diene. A functionalized polymer includes the termination product of a living polymer having the general formula AYLi, wherein A is a functional group derived from an anionic polymerization initiator; and, Y is a divalent polymer radical; wherein the anionic polymerization initiator is a carbon-lithio salt of the adduct of a cyclic secondary amine with a conjugated diene.
摘要:
A process for preparing easily separable solutions of organolithium compounds comprising the steps of reacting lithium metal, in the form of cast or extruded ingots or pieces cut therefrom, with an organo halide in mole ratios ranging from 3:1 to 20:1 in a solvent selected form a group of liquid hydrocarbons, alkyl ethers, and mixtures thereof under an inert atmosphere for one to ten hours with moderate stirring, cooling the resulting product, and separating the solution of the organolithium compound from the reacted lithium metal and by-product lithium chloride in the reactor.
摘要:
An anionic polymerization initiator includes a carbon-lithio salt of the adduct of a cyclic secondary amine with a conjugated diene. A method of preparing an anionic polymerization initiator includes reacting an excess of a cyclic secondary amine with a conjugated diene to form an adduct; and, reacting the adduct with an organolithium compound. A method of preparing a polymer includes forming a solution of one or more anionically polymerizable monomers in a hydrocarbon solvent; and, polymerizing the monomer with an anionic polymerization initiator comprising a carbon-lithio salt of the adduct of a cyclic secondary amine with a conjugated diene. A functionalized polymer includes the termination product of a living polymer having the general formula AYLi, Wherein A is a functional group derived from an anionic polymerization initiator; and, Y is a divalent polymer radical; wherein the anionic polymerization initiator is a carbon-lithio salt of the adduct of a cyclic secondary amine with a conjugated diene.
摘要:
The reaction of 2,2-difluorobenzo-1,3-dioxole with (a) an alkali metal or an alkali metal compound and then (b) a compound R.sup.1 -Z.sup.1 in which Z.sup.1 is a leaving group, or with an aldehyde produces compounds of formula I ##STR1##
摘要:
A precursor used in an MOCVD reactor for production of thin films of certain metal oxides is stabilized by introducing a ligand into the precursor during the precursor synthesis and thereby protecting the precursor from premature oxidation, nucleation, and decomposition.