Abstract: A vinyl halide paste polymer of low viscosity may be produced by adding a sulphosuccinate emulsifier to the polymer latex after microsuspension polymerisation but before isolation. This gives a polymer which can be made into a paste in known fashion.

Abstract: A process for producing olefins by contacting an olefinic feedstock with a rhenium-heptoxide/gamma-alumina disproportionation catalyst.

Abstract: Unsaturated polyester resin based filling compounds contain as accelerator a tertiary amine derived from meta-carboxy aniline.

Abstract: A heat treated catalyst composition containing antimony and to which has been added an oxide or compound of molybdenum or tungsten in an amount such as to provide from 0.05 to 1.0 atom % of molybdenum or tungsten present, is further promoted by addition of an oxide or compound of uranium and/or vanadium in an amount such as to provide from 0.005 to 0.5 atom % of uranium or vanadium present.

Abstract: Antimony containing catalysts are promoted by addition of small quantities of molybdenum from 0.5 to 1.0 atom%. Preferred compositions to be promoted contain antimony together with tin together with copper and/or iron and/or titanium.

Abstract: Aqueous microsuspension polymerization of vinyl halides in which monomer-soluble surfactant is dissolved in the monomer before it is brought into contact with the aqueous phase.

Abstract: Peroxy compounds having the structural unit: ##EQU1## are useful for the production of monomers such as caprolactam which in turn may be polymerized to give useful polymers such as Nylon 6.

Abstract: Isophorone is produced by feeding a mixture comprising 65 to 85% w/w acetone, 35 to 15% w/w water and 0.7 to 0.3% w/w potassium hydroxide to an intermediate point in a reaction column, operating at elevated pressure, at such a rate as to maintain an acetone/water azeotrope reflux having a potassium hydroxide concentration in the range 300 to 1000 ppm within the reaction column, passing from the bottom of the column a fraction containing isophorone to a hydrolysis column also operating at elevated pressure wherein acetone is separated overhead and returned to the reaction column, removing the fraction containing water, isophorone and high-boiling compounds from the bottom of the hydrolysis column, and thereafter recovering the isophorone from the bottom fraction.

Abstract: In a microsuspension polymerization of vinyl halide monomer additional monomer is added during the polymerization.

Abstract: The present invention relates to novel halogenated derivatives of esters of linear C.sub.8 alcohols and aliphatic dicarboxylic acids and a process for the preparation of such compounds.

Abstract: The present invention relates to novel halogenated derivatives of esters of linear C.sub.8 alcohols and a process for the preparation of such compounds.

Abstract: A rhenium heptoxide supported on alumina catalyst is prepared by digesting the alumina support with an aqueous solution of ammonium phosphate, ammonium dihydrogen phosphate or diammonium hydrogen phosphate at a temperature in the range ambient to the boiling point of the solution, separating the treated alumina by for example sieving and loading the treated alumina with between 1 and 15% by weight of rhenium heptoxide. The catalyst prepared in this manner is active for the disproportionation of olefinic hydrocarbons.

Abstract: A process for the preparation of moulded articles by the compression moulding at elevated temperatures in matched metal moulds of moulding compounds based on thermosettable unsaturated polyester resins, where at least one of the filler materials in the moulding compounds has a particle diameter greater than the width of flash channel of the mould used in order to enable moulded articles of improved surface finish to be produced.

Abstract: Process for polymerizing ethylene or mixtures of ethylene with other 1-olefins by contacting the monomer with a titanium modified catalyst that has been pretreated with a hydrocarbon other than the hydrocarbon used as polymerization diluent.

Abstract: Carboxyl terminated polychloroprene is produced by polymerizing chloroprene in the presence of a peroxide initiator having two carboxyl groups. The chloroprene is brought into contact initially with all the peroxide initiator employed. Compositions containing the carboxyl terminated polychloroprene are also disclosed.

Abstract: Production of acrylonitrile by ammoxidation of propylene using as catalyst an oxide composition containing antimony, uranium and titanium together with copper, iron and/or vanadium.

Abstract: Vinyl halide is homopolymerized under suspension conditions with additional vinyl halide being added after the pressure drop with polymer being recovered only after the polymerisation is completed.

Abstract: Process for the preparation of a free-flowing powdered rubber by treating a rubber with an aqueous dispersion of an anti-tack agent and suspending the rubber in powdered form in a stream of gas (e.g. air), removing at least part of the water and subsequently treating the powdered rubber with a dusting material.

Abstract: A vinyl halide paste polymer of low viscosity may be produced by adding an alkaryl sulphonate emulsifier to the polymer latex after polymerisation but before isolation. This gives a polymer which can be made into a paste in known fashion.

Abstract: A process for the preparation of unsaturated polyester resin based sheet moulding compounds in which the compound is matured by including a gelling agent for the copolymerisable monomer in the resin matrix and subjecting the sheet moulding compound to a temperature sufficient to cause the gelling agent to gel the copolymerisable monomer without activating the polymerisation initiator.