Abstract: The present invention produces chlorinated vinyl chloride resin from which hydrogen chloride can easily be removed and having little coloring as a molded article. Also, chlorinated vinyl chloride resin from which hydrogen chloride can easily be removed and excellent in heat resistance and thermal stability can be produced using a process for preparing chlorinated vinyl chloride resin by gas-solid contact chlorination which is excellent in simplicity of after treatment and facility costs. Chlorination is conducted rapidly and evenly by exposing vinyl chloride resin powder in a fluidized state with light from a light source located outside the powder layer, while supplying chlorine to the powder layer, by using devices such as a rotary reactor or stirring type reactor.

Abstract: A polymer is produced by feeding a polymerization initiator, a cationically polymerizable monomer component and a catalyst continuously to a flow-through stirring vessel reactor to thereby allow the living polymerization to initiate and feeding a reaction solution from said flow-through stirring vessel reactor to a flow-through tubular reactor continuously to thereby allow the living polymerization to proceed, said reaction solution having a conversion rate of said cationically polymerizable monomer component of not less than 1% by weight to less than 90% by weight.

Abstract: A powdery resin composition having excellent ordinary temperature and low temperature powder characteristics, in particular, excellent blocking resistance, and comprising 100 parts by weight of a graft copolymer which contains a rubber as a trunk polymer and which is obtained by emulsion polymerization using a higher fatty acid salt, 0.1 to 10 parts by weight of a crosslinked polymer of 30 to 60% by weight of methyl methacrylate, 65 to 35% by weight of an aromatic vinyl monomer, 0.1 to 25% by weight of a crosslinking monomer and 0 to 30% by weight of other copolymerizable monomer, and 0.1 to 10 parts by weight of a lubricant. According to the present invention, powder characteristics in low temperature storage of conventional graft copolymers containing a large amount of a rubber, which have been used as impact modifier for vinyl chloride resins, can be remarkably improved.

Abstract: The present invention thus provides a process for producing (D) a chlorinated hydrocarbon compound of the general formula (2): CnR1mHk(CR2R3Cl)j  (2) [wherein n is an integer of 1 to 12, m and k each independently is an integer of 0 to 25, j is an integer of 1 to 10; R1 represents an atom selected from the group consisting of chlorine, bromine, iodine, oxygen, nitrogen, sulfur and phosphorus and, when m is 2 or more, the two or more R1 groups may be the same or different, the group CnR1mHk having a valence of j does not contain any tertiary carbon-hydrogen bond; and R2 and R3 each independently represents a saturated aliphatic hydrocarbon group containing 1 to 5 carbon atoms or a group derived therefrom by substitution of a halogen atom or atoms for some hydrogen atom or atoms thereof and not containing a tertiary carbon-hydrogen bond],which process comprises adding (C) a protic acid to a mixture of (A) a compound of the general formula: CnR1mHk(CHR2R3)j  (1) [wherein m

Abstract: A process for producing organic polymers having silicon containing groups in high yields comprises hydrosilylating a polymer having unsaturated groups with a hydrosilicon compound. This process includes keeping the polymer and a solvent in an inert gas environment and introducing oxygen into the reactor just before starting the hydrosilylation reaction.

Abstract: Processes for the isolation of a telechelic isobutylene polymer in a non-aqueous system to prevent the generation of waste water having a solvent dissolved therein and processes for the preparation of a telechelic isobutylene polymer having more advantageous unsaturated groups. A process for the isolation of an isobutylene polymer includes a cationic polymerization reaction in a non-aqueous system in the presence of a catalyst MX.sub.n wherein M represents a metallic atom and X may be the same or different and represents a halogen atom or a monovalent hydrocarbon group. The process comprises conducting the cationic polymerization reaction, conducting a ligand exchange reaction of said catalyst, and then removing a component containing M.

Abstract: An isobutylene is polymerized in the presence of an aromatic initiator and a catalyst under the conditions that either a chlorinated hydrocarbon or an aromatic hydrocarbon is used singly or in admixture with an aliphatic hydrocarbon so that the reaction solution has a dielectric constant of 1 to 5 and a solubility parameter of 7.5 to 9.0.

Abstract: An apparatus for powder falling type gas-solid contacting operation which comprises a hopper for feeding solid particles, a fluidizing bunker wherein the fed particles are fluidized by introduction of a fluidizing gas, a standpipe provided between the hopper and the bunker for feeding the particles from the hopper to the bunker, the lower end of the standpipe being located in the bunker, and a vertical gas-solid column connected to the bottom of the bunker for bringing the particles falling down from the bunker into contact with a gas countercurrently, in which a vertical tube is provided in the bunker so as to surround at least the lower end part of the standpipe and extend to a position below the lower end of the standpipe, whereby the height of the fluidized bed of the particles in the bunker is stably kept constant and the particles are fed from the bunker to the gas-solid column at a constant rate.

Abstract: A method for producing dichloroethane (EDC) by reacting ethylene and chlorine in a liquid reaction medium composed mainly of EDC at a temperature of not less than the boiling point of EDC measured at ordinary pressure, characterized by leading the vapor of the reaction medium generated in a reactor from the top of the reactor to a heat exchanger so as to recover and utilize the latent heat resulting from condensation of the vapor in the heat exchanger. According to the present invention, high heat utilization efficiency can be attained with advantages as compared with conventional EDC production methods.

Abstract: A method for producing dichloroethane (EDC) from ethylene and chlorine in high selectivity, yield and efficiency and in high safety wherein the unreacted ethylene and oxygen included in an exhaust gas discharged from a reactor are prevented from forming an explosive gas mixture by diluting the exhaust gas with a dichloroethane vapor.