6 results about "Telechelic polymer" patented technology

A method for preparing a telechelic polymer, the method comprising (i) providing a dilithium initiator prepared by reacting dialkenyl compound with an alkyl lithium compound; (ii) combining the dilithium initiator and conjugated diene monomer to form a reactive difunctional diene oligomer; (iii) introducing the difunctional diene oligomer and additional diene monomer; (iv) allowing the additional diene monomer to polymerize and form a polymer having first and second reactive ends; and (v) reacting the first and second reactive ends with a functionalizing agent to thereby form a telechelic diene polymer.

The present invention relates to telechelic polymers of formula Z1-POLY-Z2, wherein the term "POLY" denotes a polymer chain comprising 1,3-diene units, ethylene units and cyclic units 1,2-cyclohexane units, Z1 and Z2 denote groups comprising a functionality, Z1 and Z2 are identical, said polymers having a macrostructure defined by a polydispersity of less than 1.5 or a number average molecular weight of more than 10000 g / mol.

The invention provides a high-performance asphalt modifier as well as a preparation method and application thereof, and relates to the technical field of pavement materials. The high-performance asphalt modifier is prepared from 30 to 38 parts of an epoxy-terminated telechelic polymer; 22 to 30 parts of a hydroxyl-terminated telechelic polymer; 15 to 23 parts of a blocked polyurethane prepolymer; 2-6 parts of a tertiary amine structure-containing auxiliary agent with warm mixing and catalytic curing effects; 9 to 16 parts of a diluent; and 2-6 parts of a vulcanizing agent. According to the modifier, the telechelic polymer and the closed prepolymer are utilized to construct an epoxy / polyurethane cross-linked network, and the vulcanizing agent is supplemented for reinforcement, so that the comprehensive pavement performance such as high and low temperature and fatigue resistance of asphalt is comprehensively improved while the normal-temperature storage stability is guaranteed. The auxiliary agent containing the tertiary amine structure not only can catalyze rapid curing of a network, but also endows the asphalt with an excellent warm mixing effect, so that the construction temperature and energy consumption are remarkably reduced, and the paving quality in a low-temperature environment is effectively guaranteed.

A telechelic polymer of formula Z1-POLY-Z2 is provided. The term “POLY” denotes a polymer chain comprising units of a 1,3-diene, ethylene units and cyclic units, 1,2-cyclohexane units, Z1 and Z2 denoting a group containing a function, Z1 and Z2 being identical. The polymer has a macrostructure defined by a dispersity of less than 1.5 or by a number-average molar mass of greater than 10 000 g / mol.

A catalytic system based on at least one rare-earth metallocene and an organomagnesium reagent as co-catalyst of formula RB—(Mg—RA)m—Mg—RB is provided. According to the formula, RB comprises a benzene nucleus substituted with the magnesium atom. One of the carbon atoms of the benzene nucleus ortho to the magnesium is substituted with a methyl, an ethyl or an isopropyl or forms a ring with the carbon atom which is its closest neighbour and which is meta to the magnesium. The other carbon atom of the benzene nucleus ortho to the magnesium is substituted with a methyl, an ethyl or an isopropyl. RA is a divalent aliphatic hydrocarbon-based chain, optionally interrupted with one or more oxygen or sulfur atoms or with one or more arylene groups. The m is a number greater than or equal to 1, preferably 1. The catalytic system allows the synthesis of dienic and / or ethylenic telechelic polymers.

A catalytic system based on at least one rare-earth metallocene and as co-catalyst an organomagnesium reagent of formula X—Mg—RA—Mg—X is provided. In the formula, RA is a divalent aliphatic hydrocarbon-based chain, optionally interrupted with an oxygen atom, a sulfur atom or with an arylene group, and X is a halogen atom. The catalytic system allows the synthesis of dienic and / or ethylenic telechelic polymers.