52 results about "Anionic addition polymerization" patented technology

A catalyst system and a process for the bulk addition polymerization or of polycyclic olefins, such as norbornene, methylnorbornene, ethylnorbornene, butylnorbornene or hexylnorbornene, 1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonapthalene, 5,5'-(1,2-ethanediyl)bisbicyclo[2.2.1]hept-2-ene, and 1,4,4a,4b,5,8,8a,8b-octahydro-1,4:5,8-dimethanobiphenylene are disclosed. The catalyst includes an organonickel or organopalladium transition metal procatalyst and an activator compound. Polymerization can be carried out in a reaction injection molding process to yield thermoplastic and thermoset molded polymeric articles possessing high glass transition temperatures.

Embodiments in accordance with the present invention encompass compositions encompassing components A and B which respectively contain a procatalyst and an activator along with one or more monomers which undergo vinyl addition polymerization when both components are mixed together to form a substantially transparent film. The monomers employed therein have a range of refractive index from 1.4 to 1.8 and thus these compositions can be tailored to form transparent films of varied refractive indices. Accordingly, compositions of this invention are useful in various opto-electronic applications, including as coatings, encapsulants, fillers, leveling agents, among others.

The embodiments of the invention relate to a multifunctional lithiated amine-containing compound comprising at least two molecules of lithiated amine in a molecule of the compound. In one embodiment, the compound has a formula

where x is an integer of 1 or more, Q is (a) an element selected from the group consisting of O, S, N, P and Si or (b) an alkylene group having from 1 to 20 methylene groups, and R₁ and R₂ are the same or different and are selected from the group consisting of alkyls, cycloalkyls and aralkyls containing from 1 to 20 carbon atoms. In another embodiment, the compound comprises cyclic lithio amines and has a formula:

The invention discloses a terminal alkenyl unsaturated acid/ester polyoxyalkyl ether represented by formula (I), and a preparation method and a use thereof. All symbols in the formula (I) are defined in the specification. The preparation method of the terminal alkenyl unsaturated acid/ester polyoxyalkyl ether is characterized in that addition polymerization or block polymerization of a terminal alkenyl unsaturated acid/ester substrate and oxirane and/or epoxypropane is carried out at a temperature of 70-120DEG C under a pressure 0.1-0.6MPa in the presence of a catalyst and a polymerization inhibitor to directly obtain the terminal alkenyl unsaturated acid/ester polyoxyalkyl ether, and a molar ratio of the terminal alkenyl unsaturated acid/ester substrate to oxirane and/or epoxypropane is 1:5-80. The terminal alkenyl unsaturated acid/ester polyoxyalkyl ether can be used for synthesizing concrete water reducers. The preparation method reduces the process step, and avoids a separation operation in order to save raw materials and reduce the dirt emission.

Belonging to the technical field of polymer synthesis, the invention relates to a frustrated Lewis pair FLP catalyzed vinyl polar monomer living polymerization method. A vinyl polar monomer is adoptedas the monomer raw material for conjugate addition polymerization under the synergic catalysis of a frustrated Lewis pair, in terms of mole, Lewis acid is greater than Lewis base and smaller than themonomer, and the ratio of the monomer to the Lewis base is 20-3200:1, the reaction temperature is room temperature, and the reaction time is 30sec-24h. The method provided by the invention has the characteristics of easily available raw materials, convenient operation, mild reaction conditions, rapidity, high conversion rate, wide monomer adaptability and the like, also the catalyst dosage is small, and the initiation efficiency is close to 100%, therefore the method is living controlled polymerization, and can realize random copolymerization and block copolymerization between different polarmonomers.

A catalyst solution for the anionic polymerization of lactones and/or lactams comprises a salt of at least one compound of the general formula I

In this formula (I), R₁ is H or an aliphatic, cycloaliphatic or aromatic radical with 1 to 12 C atoms which can also have heteroatoms or hetero groups, the radical R₂, which is the same or different, is H, halogen, C₁–C₅-alkyl, ethoxy or wherein said solvation agent S comprises N-methylpyrrolidone, N-octylpyrrolidone, N-cyclohexylpyrrolidone, N-octylcaprolactam, tetrabutyl urea or mixtures thereof methoxy, and n=1, 2 or 3, and wherein the salt is dissolved in an aprotic solvation agent S.

The present invention relates to a method for terminating anionic polymerization using phosphate ester/water mixture, more particularly to a novel method for terminating anionic polymerization using phosphate ester/water mixture as a polymerization terminator in a living polymer solution prepared by the anionic polymerization, so that the polymerization can be terminated effectively, without coupling or discoloration and with less production of basic materials that affect the antioxidant, thereby enabling control of acidity without necessitating a further neutralization process.

The invention relates to a liquid initiator for carrying out anionic lactam polymerization. The liquid initiator contains a conversion product of isocyanate (1) with a protic compound (P) and a base (B) in an aprotic solvation agent (S).

The invention relates to a liquid initiator to be used in anionic lactam polymerization. Said liquid initiator contains a reaction product of carbodiimide with a protic compound and a base in an aprotic solvation agent.

A metal compound obtained by a process comprising the step of contacting, in a specific ratio, a compound represented by the formula M¹L¹_r, a compound represented by the formula R¹_s−1TH, and a compound represented by the formula R²_4−nJ(OH)_n; a catalyst component for addition polymerization comprising the metal compound; a catalyst for addition polymerization using the catalyst component; and a process for producing an addition polymer using the catalyst.

The present invention provides a polymer with new structure, its molecular structure and synthesis method have unique features. Said polymer is an amphiphilic macrocyclic polymer containing hydrophilic ring chain and oleophilic side chain. It is characterized by that said invention utilies the synthesis of a new type monomer GTEMPO containing epoxy unit to make anionic polymerization, and can introduce the functional group for regulating and controlling free radical polymerization onto cyclopolyether polymer chain to obtain cyclopolyether whose chain side has TEMOP, then utilizes active free radical polymerization to introduce the oleophilic side chain onto polyether ring, so that it can utilize ring side TEMPO to initiate styrene monomer to make controllable free radical polymerization. Said method can obtain new polymer with special structure.

A process for producing a cycloolefin addition polymer comprising addition-polymerizing a cycloolefin in the presence of a catalyst comprising a combination of a specific transition metal compound of Group 4 of the Periodic Table, with an organoaluminum oxy compound, and/or a compound capable of reacting with the Group 4 transition metal compound to form an ion pair. The specific group 4 transition metal compound preferably has a structure such that the group 4 transition metal is bonded to a cyclopentadienyl ring in an η¹ mode. The above-mentioned catalyst exhibits high activity for both of addition homopolymerization of a cycloolefin and addition copolymerization of a cycloolefin with an α-olefin.

The present invention relates to supported catalyst composition for an addition polymerization, a process to prepare the same and the use thereof in an addition polymerization, wherein the composition comprises: (A) a particulated, solid support material; (B) an activator which is an ammonium salt of a compatible, noncoordinating anion, A-, said anion, A- containing a remnant formed by reaction of a non-ionic Lewis acid and a moiety containing an active hydrogen; and (C) a Group 4 metal complex catalyst.

A contact product obtained by a process comprising the step of contacting a compound (a) represented by the formula, M¹L¹_r, a compound (b) represented by the formula, R¹_s-1T¹H, a compound (c) represented by the formula, R²_t-2T²H₂, and a nonionic surfactant (d) having no active hydrogen; a catalyst component for addition polymerization comprising said contact product; a catalyst for addition polymerization obtained by a process comprising the step of contacting said catalyst component with a compound of a metal selected from the group consisting of metals of the Groups 3 to 12 and Lanthanide Series of the Periodic Table, and optionally an organoaluminum compound; and a process for producing an addition polymer comprising the step of polymerizing an addition polymerizable monomer in the presence of said catalyst.