The present invention relates to a process for the separation of enantiomers or resolution of racemic mixtures using high surface area core-shell polymer beads. The present invention further relates to a core-shell functionalized polymer comprising a core which comprises copolymer made from monomers selected from non-aromatic acrylate, ethylene dimethacrylate and divinyl-benzene, a shell which comprises monomers selected from glycidyl ethers of methacrylate and a chiral selector selected from tartaric acid derivatives and amino acids.

The present invention relates to a process for the separation of enantiomers or resolution of racemic mixtures using high surface area core-shell polymer beads. The present invention further relates to a core-shell functionalized polymer comprising a core which comprises copolymer made from monomers selected from non-aromatic acrylate, ethylene dimethacrylate and divinyl-benzene, a shell which comprises monomers selected from glycidyl ethers of methacrylate and a chiral selector selected from tartaric acid derivatives and amino acids.

The present invention provides a process for producing a conjugated diene polymer, the process including a production step of producing a conjugated diene polymer solution containing a conjugated diene polymer and a solvent, and a devolatilization step of heating the conjugated diene polymer solution while conveying the conjugated diene polymer solution with an apparatus having rotary twin screws, thereby devolatilizing the solvent, in which a motor current value of the screw in the devolatilization step and a motor current value of the screw under no load satisfy a predetermined relational expression.

The present invention provides a process for producing a conjugated diene polymer, the process including a production step of producing a conjugated diene polymer solution containing a conjugated diene polymer and a solvent, and a devolatilization step of heating the conjugated diene polymer solution while conveying the conjugated diene polymer solution with an apparatus having rotary twin screws, thereby devolatilizing the solvent, in which a motor current value of the screw in the devolatilization step and a motor current value of the screw under no load satisfy a predetermined relational expression.

A resin composition, comprising the following components: (a) a thermal-curable resin system, which has a dielectric loss (Df) of not higher than 0.004 at 10 GHz; and (b) an alkenyl phenoxy phosphazene component, wherein the amount of the component (b) is 1 wt % to 30 wt % based on the total weight of the resin system (a) and the component (b).

Provided are: a rubber composition for treads which contains a diene rubber in the rubber component and can simultaneously achieve blowing resistance during dry running, wet grip performance and abrasion resistance; and a pneumatic tire including a tread formed from the rubber composition for treads. The rubber composition contains: a diene rubber including styrene-butadiene rubber; zinc dithiophosphate; an inorganic filler including at least one selected from the group consisting of: a compound of the formula: mM.xSiO.sub.y.zH.sub.2O wherein M represents at least one metal selected from the group consisting of Al, Mg, Ti, Ca, and Zr, or an oxide or hydroxide of the metal, m represents an integer of 1-5, x represents an integer of 0-10, y represents an integer of 2-5, and z represents an integer of 0-10; magnesium sulfate; and silicon carbide, and having a BET value of 5-120 m.sup.2/g and a linseed oil absorption of 30-80 mL/100 g; and sulfur, wherein, per 100 parts by mass of the diene rubber, there are 0.2-15 parts by mass of the zinc dithiophosphate, 1-70 parts by mass of the inorganic filler, and less than 2.5 parts by mass of zinc oxide.

Provided are: a rubber composition for treads which contains a diene rubber in the rubber component and can simultaneously achieve blowing resistance during dry running, wet grip performance and abrasion resistance; and a pneumatic tire including a tread formed from the rubber composition for treads. The rubber composition contains: a diene rubber including styrene-butadiene rubber; zinc dithiophosphate; an inorganic filler including at least one selected from the group consisting of: a compound of the formula: mM.xSiO.sub.y.zH.sub.2O wherein M represents at least one metal selected from the group consisting of Al, Mg, Ti, Ca, and Zr, or an oxide or hydroxide of the metal, m represents an integer of 1-5, x represents an integer of 0-10, y represents an integer of 2-5, and z represents an integer of 0-10; magnesium sulfate; and silicon carbide, and having a BET value of 5-120 m.sup.2/g and a linseed oil absorption of 30-80 mL/100 g; and sulfur, wherein, per 100 parts by mass of the diene rubber, there are 0.2-15 parts by mass of the zinc dithiophosphate, 1-70 parts by mass of the inorganic filler, and less than 2.5 parts by mass of zinc oxide.

A highly saturated nitrile rubber composition obtained by mixing 7 to 40 wt % of a carboxyl group-containing highly saturated nitrile rubber (A1) containing 15 to 60 wt % of α,β-ethylenically unsaturated nitrile monomer units and 1 to 60 wt % of α,β-ethylenically unsaturated dicarboxylic acid monoester monomer units and having an iodine value of 120 or less, 10 to 78 wt % of a highly saturated nitrile rubber (A2) containing α,β-ethylenically unsaturated nitrile monomer units in 15 to 60 wt %, having a content of α,β-ethylenically unsaturated dicarboxylic acid monoester monomer units of 0.9 wt % or less, and having an iodine value of 120 or less, and 15 to 50 wt % of a polyester resin (B) at a temperature of a melting point of the polyester resin (B) or more is provided.

A highly saturated nitrile rubber composition obtained by mixing 7 to 40 wt % of a carboxyl group-containing highly saturated nitrile rubber (A1) containing 15 to 60 wt % of α,β-ethylenically unsaturated nitrile monomer units and 1 to 60 wt % of α,β-ethylenically unsaturated dicarboxylic acid monoester monomer units and having an iodine value of 120 or less, 10 to 78 wt % of a highly saturated nitrile rubber (A2) containing α,β-ethylenically unsaturated nitrile monomer units in 15 to 60 wt %, having a content of α,β-ethylenically unsaturated dicarboxylic acid monoester monomer units of 0.9 wt % or less, and having an iodine value of 120 or less, and 15 to 50 wt % of a polyester resin (B) at a temperature of a melting point of the polyester resin (B) or more is provided.

A resin composition is provided, wherein polymer particles are dispersed in a matrix of an ethylene-vinyl alcohol copolymer and the polymer particles have a sea-island structure, and one of a sea component and an island component has a glass transition temperature of 30° C. or more and the other has a glass transition temperature of −10° C. or less. The resin composition has high gas barrier properties and is also excellent in impact resistance, particularly impact resistance at low temperatures.