14 results about "Vinylidene group" patented technology

The application discloses a kind of vinylidene acenaphthene double asymmetric alpha-diimine chemical intermediates and catalyst prepared from it, intermediate and the preparation method and application of catalyst. 2,4,6-tri-tert-butyl aniline is used as raw material, in the presence of catalyst, under the condition of 120 DEG C, the vinylidene acenaphthene double asymmetric alpha-diimine chemical intermediate with structure as shown in formula (I) is obtained.Compared with prior art, the application uses commercially available, low-cost and storage condition loose 2,4,6-tri-tert-butyl aniline instead of high-cost, storage harsh 2,4-di-tert-butyl aniline as reaction raw material, which effectively reduces the raw material procurement threshold and comprehensive production cost, and simplifies the storage condition.The raw material of the method is easy to obtain, low in cost, easy to operate, high in yield, and suitable for industrial scale-up production.

A compound of formula (I) wherein R1 is H or methyl, R2 and R3 are independently selected from H, C1-C4 alkyl, cycloalkyl and phenyl-C1- C4-alkyl, or R2 and R3, together with the carbon atom to which they are attached, form a C3-C6 carbocycle, R4 is H or C1-C4 alkyl, and A is C2-C7-alkylene is a suitable precursor for polyisocyanate-adducts and crosslinkers for obtaining isocyanate-free urethane-type polymers.

Described is a device for providing haptic stimuli to a body part of a user, the device comprising an actuating element configured to deform between a non-actuated state and an actuated state upon electrothermal activation, wherein the actuating element comprises a laminated structure including a flexible layer comprising liquid crystal elastomer (LCE); a conductive layer, electrically couplable to an electrothermal activator, and comprising an electrically conductive polymer; and an priming layer provided in between the flexible layer and the conductive layer and comprising an priming polymer, wherein the electrically conductive polymer derives from 3,4-ethylenedioxythiophene (EDOT) monomer units, while the priming polymer derives from vinyl or vinylidene monomer units. Also described is a method of manufacturing said device for providing haptic stimuli to a body part of a user.

This invention discloses a phenyl-modified vinylacenaphthene nickel catalyst, its preparation method, and its applications. The catalyst has the structural formula shown in Formula (I), where X is chlorine or bromine. The catalyst has a simple preparation process and, when used as a co-catalyst for ethylene polymerization, exhibits results contrary to conventional experimental observations: larger substituents lead to lower molecular weight, better flowability, and dispersibility in the polymerized product, showing broad application prospects in the elastomer field. Furthermore, the catalyst also exhibits good thermal stability and polymerization activity, demonstrating promising industrial application potential. Formula (I)

The invention relates to a graft polyarylether (‘PAE’) copolymer (P1), a process for preparing the graft PAE copolymer (P1) from a side-chain allyl / vinylene-functionalized PAE copolymer (P0) via free radical polymerisation with at least one betaine methacrylate or acrylate (B(m)A) vinyl monomer and optionally further with vinyl pyrrolidone (VP), and the use of the graft PAE copolymer (P1) in the preparation of an article, such as a membrane or a part thereof. The graft PAE copolymer (P1) comprises at least two types of recurring units, one of which having side-chain grafted poly(B(m)A) homopolymers or poly(B(m)A-VP) copolymers. The PAE copolymer (P0), from which the graft PAE polymer (P1) is prepared, may be an amorphous side-chain allyl / vinylene-functionalized polyaryletherketone or polyarylethersulfone copolymer.

The present invention relates to a process for preparing a polymer containing ethylene units and bearing at the end of the chain a 1-arylethenyl group, which process comprises the polymerization of a monomer selected from ethylene and a monomer mixture containing ethylene and a 1,3-diene in the presence of a catalytic system and a 1-methyl-1-arylethene, the catalytic system being based on a neodymocene borohydride and an organomagnesium compound.

The application discloses an unsymmetrical (alpha-diimine) nickel olefin catalyst based on a vinylidene acen as a skeleton, and a preparation method and application thereof. The structural formula of the catalyst is shown as formula (I), wherein X is chlorine or bromine. The catalyst has simple preparation process, and shows a result opposite to general rules when catalyzing ethylene polymerization, that is, a larger substituent group leads to a polymerization product with higher crystallinity. In addition, the catalyst also shows good thermal stability and polymerization activity, and has good industrial application prospect.

The invention belongs to the technical field of organic synthesis, and particularly relates to a 2, 3-dihydro-1H-pyrrole and polysubstituted pyrrole compound and a preparation method thereof. According to the invention, N-(4-vinylidenetetrahydrofuran-2-yl) amide is used as a reaction raw material, and 2, 3-dihydro-1H-pyrrole and polysubstituted pyrrole compounds can be prepared at normal temperature and normal pressure through a gold catalysis skeleton editing strategy. The preparation method provided by the invention has the advantages of simple operation, easy preparation of raw materials, mild reaction conditions, wide substrate range and easy industrial production. The 2, 3-dihydro-1H-pyrrole and polysubstituted pyrrole compound prepared according to the method provides a new thought for heterocyclic ring synthesis in organic synthesis and pharmaceutical chemistry, and has good industrial conversion prospects and economic benefits.

The present invention is directed at multibranched acid terminated oligomers of itaconic acid. Such multibranched acid terminated oligomers also contain six or more vinylidine groups providing unsaturations that can then be relied upon for subsequent Michael nucleophilic addition type reactions. The subject oligomers have particular use for treatment of damaged hair or skin.

A process for preparing a polyalpha-olefin (PAO) having a high vinylidene content (or total vinylidene and tri-substituted vinylene content) and a low vinyl and / or di-substituted vinylene content and a relatively low molecular weight, comprising contacting a feed containing C6-C 32 The feed of alpha-olefins is contacted with a catalyst system comprising an activator soluble in the non-aromatic hydrocarbon and a metallocene compound, typically a cyclopentadienyl-tetrahydro-s-indacenyl Group 4 transition metal compound.

The invention relates to a graft polyarylether (‘PAE’) copolymer (P1), a process for preparing the graft PAE copolymer (P1) from a side-chain allyl / vinylene-functionalized PAE copolymer (P0) via free radical reaction with vinyl pyrrolidone, and the use of the graft PAE copolymer (P1) in the preparation of an article, such as a membrane or a part thereof. The graft PAE copolymer (P1) comprises at least two types of recurring units, one of which having side-chain grafted poly(vinylpyrrolidone). The invention also relates to an amorphous side-chain allyl / vinylene-functionalized polyaryletherketone copolymer (P0).

Fuel composition comprising: (a) a gasoline base fuel suitable for use in a spark ignition internal combustion engine; and (b) a poly butene polymer, wherein the polybutene polymer has a number average molecular weight in the range from 200 to 10,000 g / mol and wherein greater than 30% of the polymer molecules in the poly butene polymer have a terminal vinylidene group; and (c) a tetraalkylethane compound having the formula (I): wherein Ar represents an aryl group and each X is independently selected from a hydrogen atom, substituted or unsubstituted, straight chain or branched C1-C12 alkyl group, (CH2)nOH or (CH2)nNH2, wherein n is in the range of 1 to 9, provided that at least one of the X groups in each CX3 group is a hydrogen atom. The fuel compositions of the present invention provide improved engine power and reduced burn duration.

The application discloses a large steric hindrance double asymmetric (alpha-diimine) nickel olefin catalyst based on a vinylidene acenaphthene quinone skeleton, and a preparation method and application thereof. A structural formula of the catalyst is shown as formula (I), wherein X is chlorine or bromine. The catalyst has a simple preparation process, and when the catalyst is used to catalyze ethylene polymerization under the action of a cocatalyst, the catalyst can be used to prepare ultrahigh molecular weight polyethylene without affecting a branching degree. In addition, the catalyst also has good thermal stability and polymerization activity, and has a good industrial application prospect.

The invention belongs to the technical field of organic synthesis, and particularly relates to N-(4-vinylidene tetrahydrofuran-2-yl) amide, a preparation method of the N-(4-vinylidene tetrahydrofuran-2-yl) amide, a derivative of the N-(4-vinylidene tetrahydrofuran-2-yl) amide and a preparation method of the derivative. According to the invention, the N-(4-vinylidene tetrahydrofuran-2-yl) amide compound can be prepared at normal temperature and normal pressure by taking substituted 2-butyne-1, 4-diol and an alkenyl amide reactant as raw materials and lewis acid as a catalyst. The preparation method provided by the invention is convenient to operate, simple and easily available in raw materials, mild in reaction conditions and suitable for industrial application and production. The N-(4-vinylidene tetrahydrofuran-2-yl) amide compound prepared according to the preparation method provided by the invention has relatively high yield and purity, is easy to derivatize, and has good application prospects and economic benefits in the fields of organic synthesis and drug research and development.