Abstract: Aromatic polyetherketones and/or sulphones are produced by heating a halophenol of formula ##STR1## where X = halogen and is ortho or para to Q; Q = --CO-- or --SO.sub.2 --, Ar = an aromatic radical, with about 1/2 mole of a granular alkali metal carbonate per mole of halophenol in the presence of N-methyl pyrrolidone, dimethyl sulphone or an aromatic sulphone solvent at 200.degree.-400.degree. C.

Abstract: Aromatic polymers containing benzenoid groups and oxygen atoms in the polymer chains are made by the action of an alkali metal hydroxide on a dihalogeno-benzenoid compound in which each halogen atom is activated by an inert electron-attracting group such as --SO.sub.2 --.

Abstract: New aromatic polymers comprising units of the formula ##STR1## and copolymers comprising such units or other units such as ##STR2## The new polymer may be made from the alkali metal salt of a halophenol of the formula ##STR3##

Abstract: A solid surface is coated with an adhesive composition comprising an aromatic polysulphone which has a reduced viscosity of at least 0.3 and which contains at least 0.2 (desirably 0.5 to 3.5) hydroxyl groups per 100 polymer repeat units and has been heated at 330.degree. C to 450.degree. C in the presence of oxygen.

Abstract: A process for the preparation of aromatic polyketones and copolyketone/sulphones (ketone to sulphone content 75/25 to 100/0 having high molecular weight comprises heating dialkali metal salt of a bisphenol containing ketone linking groups with equimolar or slight molar excess of dihalobenzenoid compound having halogen atoms activated by a ketone or sulphone linking group in the presence of certain diaryl sulphones at 250.degree. to 400.degree. C.

Abstract: A novel amorphous thermoplastic aromatic polysulphone is provided consisting of repeating units having the formula ##STR1##

Abstract: A polyamide comprising repeating units having the structure I ##STR1## in which A is a bivalent aliphatic, cycloaliphatic or araliphatic residue containing at least 4 carbon atoms.

Abstract: A solid surface is coated with an adhesive composition comprising an aromatic polysulphone which has a reduced viscosity of at least 0.3 and which contains at least 0.2 (desirably 0.5 to 3.5) hydroxyl groups per 100 polymer repeat units and has been heated at 330.degree. to 450.degree.C in the presence of oxygen.

Abstract: Compounds of the formula ##SPC1##Where X is ##SPC2##Or a group having the formula ##SPC3##In which m takes the value 1, 2 or 3 and where Q is fluorine, chloride, bromine or a hydroxyl group or alkali metal salt thereof. Compounds are also provided having the formula ##SPC4##Where Z is a hydrogen atom or a hydroxyl group (or alkali metal salt thereof) where Q is a hydroxyl group (or alkali metal salt thereof).

Abstract: Phenol precursors are provided having the formula (Q'ZQO).sub.m Y in which Q is a bivalent aromatic radical, Q' is a univalent aromatic radical or the moiety of a bivalent aromatic radical, Z is --SO.sub.2 --, --SO--, --CO-- or --CH.sub.2 --, Y is --CO-- or --POCl.sub.2 and m is an integer having the value 1 when Y is --POCl.sub.2 and the value 2 when Y is --CO--.

Abstract: New aromatic polymers comprising units of the formula ##SPC1##And copolymers comprising such units or other units such as ##SPC2##The new polymer may be made from the alkali metal salt of a halophenol of the formula ##SPC3##

Abstract: A method for the preparation of aromatic thiols which comprises reacting a benzenoid compound having at least one halogen atom activated by an inert electron-attracting group with an alkali metal disulphide in stoichiometric proportion of from 1.0 to 2.0 moles per gram atom of activated halogen to be replaced.

Abstract: A process for the preparation of aromatic sulphone copolymers in which a polyaryl sulphone containing repeat units --Ar--SO.sub.2 -- (where Ar is a bivalent aromatic residue which may vary from unit to unit in the polymer chain and at least some of the Ar units have an aromatic ether or thioether group in the polymer chain ortho or para to at least one --SO.sub.2 -- group) is caused to react with an alkali metal salt of at least one halophenol or halothiophenol or with essentially equimolar quantities of an alkali metal salt of at least one dihydric phenol or thiophenol and at least one dihalobenzenoid compound, in which the halogen atoms are activated by an electron-attracting group.

Abstract: aromatic polymers having phenylene groups linked by oxygen atoms, ketone groups and sulphone groups, that is etherketone/sulphone copolymers, containing 40 to 90 and preferably 50 to 80, mole % of the repeat units ##STR1## and correspondingly 10 to 60, particularly 20 to 50, mole % of repeat units ##STR2## where Q and Q' are --SO.sub.2 -- or --CO--, the number of --SO.sub.2 -- groups being 3 to 25% of the total number of --SO.sub.2 -- and --CO-- groups are disclosed. Such copolymers are made more cheaply than the similar copolymers of U.K. Pat. No. 1,414,422 yet exhibit improved properties of a somewhat reduced melting point, owning to the incorporation of sulphone linkages in the polymer chain, thus providing greater latitude over processing temperatures. Preferably from 10 to 20% of the total sulphone and ketone linkages in the copolymers are sulphone linkages. The disclosed copolymers are particularly suitable for wire insulation where the polymer has to retain its properties at high service temperatures.

Abstract: halophenols of formula ##STR1## where X = halogen, are made by condensation of a compound ##STR2## where Z is OH or halogen with a phenol in the presence of anhydrous HF as a catalyst. The compound ##STR3## where X = F, may be made in situ by the reaction of ##STR4## with an alkali metal nitrite in anhydrous HF.