Abstract: According to this invention, a process for producing fluorine containing polymer to obtain composite polymer electrolyte composition having excellent ion transport number, that is, ion transfer coefficient, for example, excellent transport number of lithium ion, is provided. A process for producing fluorine containing polymer comprising graft-polymerizing a molten salt monomer having a polymerizable functional group and a quaternary ammonium salt structure having a quaternary ammonium cation and anion, with a polymer having the following unit; —(CR1R2—CFX)— X means halogen atom except fluorine atom, R1 and R2 mean hydrogen or fluorine atom, each is same or different atom.

Abstract: According to this invention, a process for producing fluorine containing polymer to obtain composite polymer electrolyte composition having excellent ion transport number, that is, ion transfer coefficient, for example, excellent transport number of lithium ion, is provided. A process for producing fluorine containing polymer comprising graft-polymerizing a molten salt monomer having a polymerizable functional group and a quaternary ammonium salt structure having a quaternary ammonium cation and anion, with a polymer having the following unit; —(CR1R2—CFX)— X means halogen atom except fluorine atom, R1 and R2 mean hydrogen or fluorine atom, each is same or different atom.

Abstract: According to this invention, a process for producing fluorine containing polymer to obtain composite polymer electrolyte composition having excellent ion transport number, that is, ion transfer coefficient, for example, excellent transport number of lithium ion, is provided. A process for producing fluorine containing polymer comprising graft-polymerizing a molten salt monomer having a polymerizable functional group and a quaternary ammonium salt structure having a quaternary ammonium cation and anion, with a polymer having the following unit; —(CR1R2—CFX)— X means halogen atom except fluorine atom, R1 and R2 mean hydrogen or fluorine atom, each is same or different atom.

Abstract: According to this invention, a process for producing fluorine containing polymer to obtain composite polymer electrolyte composition having excellent ion transport number, that is, ion transfer coefficient, for example, excellent transport number of lithium ion, is provided. A process for producing fluorine containing polymer comprising graft-polymerizing a molten salt monomer having a polymerizable functional group and a quaternary ammonium salt structure having a quaternary ammonium cation and anion, with a polymer having the following unit; —(CR1R2—CFX)— X means halogen atom except fluorine atom, R1 and R2 mean hydrogen or fluorine atom, each is same or different atom.

Abstract: A water-absorbent resin of polyacrylic acid series characterized in that the resin has the crosslinked surface formed by reacting a powdery water-absorbent resin of polyacrylic acid series with an aluminum compound which can react with the powdery resin in the presence of polyhydric alcohol and water.

Abstract: In a suspension polymerization process of preparing styrenic polymer particles from a styrenic monomer and small particles of a styrenic polymer in a definite particle size range, styrenic polymer particles having a uniform particle size are obtained without the formation of fine polymer powders by simultaneously but separately dropwise adding to an aqueous suspension of the small particles of the styrenic polymer (1) a solution of 100-60% by weight of a suspension polymerization catalyst and 1-10% by weight of the styrenic monomer and (2) a solution of 0-40% by weight of the catalyst and 99-90% by weight of the styrenic monomer simultaneously but separately from each other.

Abstract: Styrenic polymer particles having a substantially uniform particle size are prepared by suspending styrenic polymer particles having particle sizes in a certain range in water to provide an aqueous suspension and after adding to the suspension a styrenic monomer, a suspension polymerization catalyst and a polymerization retarder in an amount of 1/200 to 1/15 mole per 1 mole of the catalyst, conducting the suspension polymerization. By conducting the polymerization in the presence of a foaming agent, one can produce foamable styrenic polymer particles having a substantially uniform particle size.

Abstract: In a suspension polymerization process of preparing styrenic polymer particles from a styrenic monomer and small particles of a styrenic polymer in a definite particle size range, styrenic polymer particles having a uniform particle size are obtained without the formation of fine polymer powders by simultaneously but separately dropwise adding to an aqueous suspension of the small particles of the styrenic polymer (1) a solution of 100 - 60% by weight of a suspension polymerization catalyst and 1 - 10% by weight of the styrenic monomer and (2) a solution of 0 - 40% by weight of the catalyst and 99 - 90% by weight of the styrenic monomer simultaneously but separately from each other.

Abstract: Styrenic polymer particles having a substantially uniform particle size are prepared by suspending styrenic polymer particles having particle sizes in a certain range in water to provide an aqueous suspension and after adding to the suspension a styrenic monomer, a suspension polymerization catalyst and a polymerization retarder in an amount of 1/200 to 1/15 mole per 1 mole of the catalyst, conducting the suspension polymerization. By conducting the polymerization in the presence of a foaming agent, one can produce foamable styrenic polymer particles having a substantially uniform particle size.

Abstract: Expandable ethylenically unsaturated polymer particles are produced by using in the process a suspension stabilizer comprising calcium carbonate particles having the surfaces thereof treated with resin acid. The method for the production of such expandable ethylenically unsaturated polymer particles from ethylenically unsaturated polymer particles includes suspending such particles in water and impregnating the particles with an organic expanding agent having a boiling point lower than the softening point of the polymer particles.

Abstract: A process for preparing expandable styrene polymer particles by using calcium hydroxide as a suspending agent to prevent agglomeration of styrene polymer particles during impregnation with an expanding agent. The process comprises preparing expandable styrene polymer particles from styrene polymer particles in water, wherein the expanding agent (which does not dissolve styrene polymer particles or slightly swells the particles and has a boiling point lower than the softening point of the particles) is added in the presence of the suspending agent and the particles being impregnated thereby.

Abstract: A process for preparing expandable styrene polymer particles by using magnesium oxide as a suspending agent to prevent agglomeration of styrene polymer particles during impregnation with an expanding agent. The process comprises preparing expandable styrene polymer particles from styrene polymer particles in water, wherein the expanding agent (which does not dissolve styrene polymer particles or slightly swells the particles, and has a boiling point lower than the softening point of the particles) is added in the presence of the suspending agent and the particles being impregnated thereby.