A modified conjugated diene-based polymer represented by Formula 1, wherein a terminal of a polymer chain is modified, and a method for preparing same are provided. By including a modifier derived unit having a specific structure, a beta value affecting cold flow may be reduced through controlling the degree of branch, and accordingly, the cold flow of a polymer may be efficiently controlled and a mooney viscosity increasing ratio may be improved.

The present invention concerns new precursors of recyclable cross-linked diene elastomers comprising at least one furanyl group along the chain and comprising chain-end units with furanyl groups, their use in the preparation of said recyclable elastomers and their process of preparation. The invention also concerns new recyclable cross-linked diene elastomers, their preparation process and their uses.

Provided are a terminally modified diene-based polymer having excellent mechanical properties, and also a method for producing the same. The terminally modified diene-based polymer is obtainable by allowing a diene-based polymer terminated with ketone or aldehyde groups to react with a heterocyclic compound that is a nitrogen-containing unsaturated five-membered ring or six-membered ring compound having a primary amine.

Provided are a terminally modified diene-based polymer having excellent mechanical properties, and also a method for producing the same. The terminally modified diene-based polymer is obtainable by allowing a diene-based polymer terminated with ketone or aldehyde groups to react with a heterocyclic compound that is a nitrogen-containing unsaturated five-membered ring or six-membered ring compound having a primary amine.

Provided are a terminally modified diene-based polymer having excellent mechanical properties and also a method for producing the same. The terminally modified diene-based polymer is obtainable by allowing a diene-based polymer terminated with ketone or aldehyde groups to react with an aminophosphonic acid compound represented by general formula (1) or (2):

##STR00001##

wherein in formulas (1) and (2), R.sub.1 and R.sub.4 each represent a C.sub.1-10 alkanediyl group, R.sub.2 and R.sub.3 may be the same or different and each represent hydrogen, a C.sub.1-3 alkyl group, or a phenyl group, R.sub.5, R.sub.6, R.sub.8, and R.sub.9 may be the same or different and each represent hydrogen, a C.sub.1-3 alkyl group, or a phenyl group, and R.sub.7 represents hydrogen or a hydroxyl group.

Provided are a terminally modified diene-based polymer having excellent mechanical properties and also a method for producing the same. The terminally modified diene-based polymer is obtainable by allowing a diene-based polymer terminated with ketone or aldehyde groups to react with an aminophosphonic acid compound represented by general formula (1) or (2):

##STR00001##

wherein in formulas (1) and (2), R.sub.1 and R.sub.4 each represent a C.sub.1-10 alkanediyl group, R.sub.2 and R.sub.3 may be the same or different and each represent hydrogen, a C.sub.1-3 alkyl group, or a phenyl group, R.sub.5, R.sub.6, R.sub.8, and R.sub.9 may be the same or different and each represent hydrogen, a C.sub.1-3 alkyl group, or a phenyl group, and R.sub.7 represents hydrogen or a hydroxyl group.

A method of producing a powder mass for a lithium battery, the method comprising: (a) providing a solution containing a sulfonated elastomer dissolved in a solvent or a precursor in a liquid form or dissolved in a solvent; (b) dispersing a plurality of particles of a cathode active material in the solution to form a slurry; and (c) dispensing the slurry and removing the solvent and/or polymerizing/curing the precursor to form the powder mass, wherein the powder mass comprises multiple particulates and at least a particulate comprises one or a plurality of particles of a cathode active material being encapsulated by a thin layer of sulfonated elastomer having a thickness from 1 nm to 10 μm, a fully recoverable tensile strain from 2% to 800%, and a lithium ion conductivity from 10.sup.−7 S/cm to 5×10.sup.−2 S/cm at room temperature.

A modified natural rubber has a branching degree of 0.40 to 0.70 and includes a linking structure represented by formula (C), the linking structure having been formed by allowing polyisoprene, having a structure represented by formula (A) and/or formula (B), to bind in the structure to an amino compound having two or more primary amino groups: ##STR00001##
wherein X represents a hydrogen atom or a methyl group, and Ps, which may be the same or different from each other, represent a polyisoprene unit;
W-(Q).sub.m  (C)
wherein W represents a residue obtained by removing amino end groups from the amino compound Q represents at least one selected from the group consisting of the following general formulae (Q-1) to (Q-4), and m represents 2 to 4; ##STR00002##
wherein *.sup.1 indicates binding to a carbon atom of a polyisoprene unit, and *.sup.2 indicates binding to a carbon atom of the residue represented by W.

A low viscosity polymer having a linear or branched backbone derived from farnesene monomers and at least one terminal-end functionalized with a hydroxyl group. This polymer may be further hydrogenated to reduce unsaturation and acrylated, such that it may be incorporated into a LOCA composition. The LOCA composition may be used in a laminated screen assembly, such as a touch screen, for electronic devices by adhering the LOCA composition between an optically transparent layer, such as a cover glass, and a display. The cured LOCA composition has a refractive index similar to the optically transparent layer. A method of making the low viscosity polymer for the LOCA composition includes anionically polymerizing farnesene monomers, quenching a living end of the polymer to provide the hydroxyl-terminated polymer; hydrogenating the hydroxyl-terminated polymer; and reacting the at least partially saturated hydroxyl-terminated polymer with at least one reagent to provide an acrylate terminated hydrogenated polymer.

A low viscosity polymer having a linear or branched backbone derived from farnesene monomers and at least one terminal-end functionalized with a hydroxyl group. This polymer may be further hydrogenated to reduce unsaturation and acrylated, such that it may be incorporated into a LOCA composition. The LOCA composition may be used in a laminated screen assembly, such as a touch screen, for electronic devices by adhering the LOCA composition between an optically transparent layer, such as a cover glass, and a display. The cured LOCA composition has a refractive index similar to the optically transparent layer. A method of making the low viscosity polymer for the LOCA composition includes anionically polymerizing farnesene monomers, quenching a living end of the polymer to provide the hydroxyl-terminated polymer; hydrogenating the hydroxyl-terminated polymer; and reacting the at least partially saturated hydroxyl-terminated polymer with at least one reagent to provide an acrylate terminated hydrogenated polymer.