Abstract: Acylation or sulphonylation of aromatic compounds, one of which is selected from aromatic carboxylic and sulphonic acids and esters and anhydrides thereof, using an aluminosilicate catalyst having acidic sites.

Abstract: A crystalline polyarylether capable of being shaped into fibers or films or moulded or used as a matrix in composites, contains repeating units Ph'.sub.n, Ar.sup.1 and Ar.sup.2 connected by ether linkages, whereinPh' is 1,3 or 1,4-phenylene optionally substituted with 0 to 4 methyl or chloro groups,n is an integer from 1 to 4Ar.sup.1 is Ph[CO[Ph'CO].sub.x Ph].sub.ywhereinx=0 or 1y=1 or 2Ph is 1,4-phenylene optionally substituted with 0 to 4 methyl or chloro groups, andAr.sup.2 is [Ph.sub.n SO.sub.2 ].sub.v Ph'.sub.wwherein u, v and w are integers from 1 to 4; said units being in the relative molar proportions:______________________________________ Ph'.sub.n 40 to 60% Ar.sup.1 92 to 50% of the total of Ar1 and Ar.sup.2. and Ar.sup.

Abstract: Polymer blends containing (i) 0.2-95% by weight of a high molecular weight .beta.-hydroxybutyric acid homo- or copolymer and (ii) a polymer containing at least 25% by weight of chlorine or nitrile groups, such as chlorinated polyethylene, polyvinyl chloride, or a high acrylonitrile resin.In small quantities the .beta.-hydroxybutyric acid polymer acts as a processing aid for the chlorine or nitrile containing polymer.In larger quantities the properties of the .beta.-hydroxybutyric acid polymer or the chlorine or nitrile containing polymer are improved.

Abstract: A polymer composition in the form of a film which composition comprises a compatible blend of an alkylene oxide polymer such as polyethylene oxide and an aromatic polyethersulphone.

Abstract: An opaque or translucent molecularly oriented film made from a composition comprising at least one linear polyester (preferably polyethylene terephthalate) and 0.5-100% by weight based on polyester of at least one olefine polymer, wherein said composition contains at least one carboxylated polyolefine in an amount of 0.05-50% by weight based on olefine polymer. The composition used for the film is preferably formed by precompounding the olefine polymer and carboxylated olefine and then mixing with the polyester.

Abstract: A solid transition metal compound is ground with an organo-sulphur compound which is a defined aromatic sulphone, sulphonamide or sulphide such as diphenylsulphone, N,N-diethyl-4-phenoxy benzenesulphonamide or phenoxathiin. A Lewis Acid such as titanium tetrachloride can be present during the grinding operation. Alternatively there may be present, during the grinding, an oxidizing agent capable of generating tetravalent titanium in the presence of titanium trichloride, for example carbon tetrachloride or gaseous oxygen. The grinding can be effected in a ball-mill or a vibrating mill. The materials may be added during the grinding and the temperature may be varied during the grinding. A liquid which is a solvent for the organo-sulphur compound or complexes thereof with aluminum chloride may be present during a part of the grinding.

Abstract: A reaction product of a transition metal compound, for example titanium tetrachloride, and an organo-compound of a non-transition metal, for example an aluminium dialkyl halide, is treated with a sulphur containing organic compound, in an amount of up to 2.00, preferably up to 1.50 molar relative to the transition metal compound. The mixture is heated to a temperature in the range from 60.degree. C. up to 160.degree. C. Before treating with the sulphur compound, the reaction product can be heated to a temperature of up to 160.degree. C. The Lewis Base compound is a sulphone, a sulphonamide or a fused-ring heterocyclic compound such as phenoxathiin. The product obtained can be used as a component of an olefine polymerization catalyst.

Abstract: A transition metal product, for example a titanium trichloride material, is obtained by milling a solid transition metal compound with a carboxylic acid or an ester thereof, for example methylmethacrylate and contacting with an organo-Lewis Base such as an amine, an organo-phosphorus compound or a sulphone derivative. The organo-Lewis Base may be milled with the transition metal compound or may be added to the transition metal compound as a solution in an inert liquid. The product can be used as a component of an olefine polymerization catalyst.