Abstract: A coating composition which comprises a dispersion in an aqueous medium of a dispersed vinyl polymer which is stabilized in dispersion by the presence of a stabilizer which is an epoxy resin, which has at least two hydrolyzable silane groups and at least one protonated or quaternised amine group.

Abstract: Curable partially plasticised (optionally particulate) compositions comprising partially crystalline polymers which can be made by for example a non-attritive method comprising heating a mixture of the polymer in a preferably moderate curable solvent for the polymer to a temperature above the melting point of the polymer when in the solvent and then cooling whereupon the polymer re-crystallizes from the mixture. Also the use of such compositions in coating and in coating formulation.

Abstract: This invention is a silica free curable composition comprisingA) A stable dispersion in an aqueous medium of a First Polymer having a weight average molecular weight of at least 50,000 which is insoluble in water and contains silane groups with hydrolyzable functionality.B) A solution or dispersion in the aqueous medium of a second polymer which has a number average molecular weight between 1,000 and 20,000 and at least two silane groups with hydrolyzable functionality. The non-volatile weight ratio of the first polymer to the second is 40:1 to 1:4.

Abstract: A process for forming a coating on a surface of a substrate which comprises;(i) applying a layer of a composition comprising a polymer phase, in which the polymer phase comprises a crystallisable polymer selected from polyesters, polyamides, and polycarbonates, in intimate admixture with a non-curable solvent for the crystallisable polymer, and,(ii) heating the applied layer to a temperature at least high enough to cause film formation.

Abstract: A curable composition comprising:a) an aqueous dispersion of a Polymer having a MWt of at least 50,000, which is insoluble in water and which contains silane groups;B) a solution or dispersion of a Polymer which has a MWt between 300 and 20,000, comprising at least two silane groups and also comprising covalently bonded cationic hydrophilic groups the ratio of the Polymer (A) to the Polymer (B) being in the range 40:1 to 1:4.

Abstract: A composition comprising a polymer in dispersion in a non-aqueous continuous diluent, in which the polymer phase comprises a crystallisable polymer, selected from polyesters, polycarbonates and polyamides, a curable solvent for the crystallisable polymer which is miscible with the continuous diluent, and optionally, an auxiliary solvent, and in which the curable solvent is at least partially reacted with the crystallisable polymer, so as to form a stabiliser for the dispersion.

Abstract: a composition comprising a polymer phase in dispersion in a non-aqueous continuous diluent in which the polymer phase comprises a crystallizable polymer, selected from polyesters, polyamides and polycarbonates, in intimate admixture with a curable solvent for the crystallizable polymer, a stabilizer and, optionally, an auxiliary solvent.

Abstract: A coating process in which a curable composition containing crystallizable polymer is provided on a surface and subsequently cured to produce a cured coating on the surface, wherein the process comprises(a) making a curable composition comprising a dispersion in a curable non-permanent solvent system of solid crystallizable polymer comprising amorphous zones containing entrapped solvent by forming a solution of the polymer and non-permanent curable solvent system at an elevated temperature and cooling the solution so obtained to cause liquid/solid phase separation of solid polymer, curable composition being made in situ on the surface or away from the surface,(b) introducing a curing agent reactable with the curable solvent system so as to be able to cure the system,(c) where the curable composition is made away from the surface, applying the curable composition to the surface and(d) subjecting the curable composition to conditions under which the solvent system cures to form the cured coating.

Abstract: A process for the application of a thin crystalline polypropylene coating to a surface which employs partially crystalline polypropylene particles which comprise zones of amorphous polypropylene containing entrapped moderate solvent. When heated particles flow and coalesce better than conventional polypropylene particles and so allow thinner coatings to be obtained. Also articles to which the coatings have been applied.

Abstract: A method of shaping a body of thermoformable material containing continuous filaments by selecting a thermoplastic polymeric material having a minimum forming temperature which is no less than, and is preferably greater than the minimum temperature at which the thermoformable material of the reinforced body can be formed, contacting at least one surface of the reinforced body with the thermoplastic material, heating the reinforced body and a body of the thermoplastic material to a temperature at which the thermoplastic can be formed and applying a differential pressure preferably of not greater than 10 atmospheres, between opposite sides of the assembly of thermoplastic body and thermoformable body to induce a desired shaping of the reinforced thermoformable body and cause rearrangement of the filaments relative to each other, and adhering the thermoplastic body to the thermoformable body.

Abstract: A method of producing a fibre reinforced structure by melt impregnation of continuous fibres with a thermoformable polymer melt comprising pre-wetting the filaments of the fibres with a composition containing a melt plasticizer for the thermoformable polymer, prior to introducing the pre-wetted fibres into the melt, optionally removing the plasticizer when the composition contains a polymer miscible with plasticizer to leave polymer coated filaments and introducing the pre-wetted filaments into a polymer melt, optionally a polymer melt containing a metal plasticizer for the melt and preferably removing the plasticizer from the composition by volatilization.The pre-wetted polymer coated filaments are useful materials as reinforcing fibres for use in processes other than direct melt impregnation. They can be used in the process known as film stacking impregnation or in processes involving initial impregnation using particulate polymers or alternatively in conventional extrusion compounding.

Abstract: A method of shaping a body of thermoformable material containing continuous filaments comprising selecting a shaping polymer material having a glass transition temperature which is greater than the glass transition temperature of the thermoformable material of the reinforced body, locating the reinforced thermoformable body between a pair of sheets of the selected shaping polymer, heating the assembly of reinforced body and shaping polymer sheets to a temperature at which the reinforced material can be formed and the shaping polymer can be stretched and applying a differential pressure preferably of not greater than 10 atmospheres, between opposite sides of the assembly of shaping polymer sheets and thermoformable body to induce a desired shaping of the reinforced thermoformable body and cause rearrangement of the filaments relative to each other.

Abstract: A method of increasing the molecular weight of a poly(aryl ether) comprising providing a mixture of (1) at least one polyaryl ether comprising polymer chains having end groups selected from groups of formula--Ar--X, preferably --Y--Ar--X and --Ar--OXand (2) a reagent having nucleophilic activity selected from (a) alkaline salts of Group I or Group II metals (as hereinafter defined) and (b) reagents have radicals --X and --OZ, reactive respectively with the end groups --Ar--OZ and --Ar--X, wherein when the end group is --Ar--X the reagent is either a difunctional reagent having either both end groups in the form of reactive --OZ groups or a difunctional reagent having one reactive --OZ group and one reactive --X group and when the end group is --Ar--OZ the reagent is a difunctional reagent having reactive end groups --X, and wherein Ar represents an arylene radical, preferably a phenylene radical, X is a monovalent radical capable of nucleophilic displacement from Ar, preferably selected from halogen, nitrile

Abstract: A crystallizable thermoplastic aromatic polyetherketone, the polymeric chain of which contains the repeat unit--Ar.sub.1 --CO--Ar.sub.2 --O--where Ar.sub.1 and Ar.sub.2 are aromatic radicals which may be the same or different and comprise at least one aromatic ring, the polymeric chains having terminal ionic groups --A--X, where A is an anion and X is a metal cation. The anion is preferably selected from sulphonate, carboxylate, sulphinate, phosphonate, phosphate, phenate and thiophenate and the cation is preferably alkali metal or alkaline earth metal. The products may be used in blends with other polyetherketones as a nucleant for the other polyetherketones.

Abstract: A method of increasing the molecular weight of a poly(aryl ether) comprising providing a mixture of (1) at least one polyaryl ether comprising polymer chains having end groups selected from groups of formula--Ar--X,preferably--Y--Ar--X and --Ar--OXand (2) a reagent having nucleophilic activity selected from (a) alkaline salts of Group I or Group II metals (as hereinafter defined) and (b) reagents have radicals --X and --OZ, reactive respectively with the end groups --Ar--OZ and --Ar--X, wherein when the end group is --Ar--X the reagent is either a difunctional reagent having either both end groups in the form of reactive --OZ groups or a difunctional reagent having one reactive --OZ group and one reactive --X group and when the end group is --Ar--OZ the reagent is a difunctional reagent having reactive end groups --X, and wherein Ar represents an arylene radical, preferably a phenylene radical, X is a monovalent radical capable of nucleophilic diplacement from Ar, preferably selected from halogen, nitrile (CN

Abstract: An extruded profiled section characterized in that it has been extruded from a composition comprising a blend of a linear polyamide, a linear polyester containing at least 80% by weight of ethylene terephthalate units and an inorganic fibrous filler wherein the composition contains 5 to 60% by weight of the composition of the filler and the weight ratio of polyamide to polyester is between 1:1 and 49:1, which composition preferably has a melt flow index of not greater than 2 measured according to ASTM-D1238 using a standard die of bore 2.096 mm, length 8 mm and a load of 2.16 kg at a temperature of 285.degree. C.A preferred composition for preparing the extruded profiled section comprises a blend in which the polyamide contains an excess of terminal amino groups, and preferably at least 20 g equivalents of terminal amino groups per 10.sup.6 g of polyamide, in excess of the carboxyl groups.

Abstract: An extruded profiled section characterized in that it has been extruded from a composition comprising a blend of a linear polyamide, a linear polyester containing at least 80% by weight of ethylene terephthalate units and an inorganic fibrous filler wherein the composition contains 5 to 60% by weight of the composition of the filler and the weight ratio of polyamide to polyester is between 1:1 and 49:1, which composition preferably has a melt flow index of not greater than 2 measured according to ASTM-D1238 using a standard die of bore 2.096 mm, length 8 mm and a load of 2.16 kg at a temperature of 285.degree. C.A preferred composition for preparing the extruded profiled section comprises a blend in which the polyamide contains an excess of terminal amino groups, and preferably at least 20 g equivalents of terminal amino groups per 10.sup.6 g of polyamide, in excess of the carboxyl groups.

Abstract: A fast crystallizing polyester wherein the polyester has an intrinsic viscosity of greater than 0.3 and at least 90 mole % of the repeating units of the polyester are residues obtained from aromatic diacids or hydroxyacids and aliphatic diols characterized in that at least some of the acid end groups of the polyester have the formula --Y.sup.- M.sup.+ where M is an alkaline metal ion and Y is an anion selected from carboxylate, sulphinate, phosphinate, phosphate, sulphonate, phosphite and borate ions, which ionized end groups have been produced during polymerization of the polyester by either:(a) copolymerizing units derived from materials of formula X--R--Y.sup.- M.sup.+ wherein X is a group capable of being polymerized onto the polyester chain, R is an aliphatic, cycloaliphatic or aromatic group, or(b) polymerizing the polyester in the presence of an alkaline metal salt or corresponding base,the concentration of groups of formula Y.sup.- M.sup.

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: Fast crystallizing polyester compositions obtained by reacting a polyester which is a block copolyester containing the repeating polymeric segments A and B wherein A is a polymeric segment of ethylene terephthalate units and B is a polymeric segment having a glass-transition temperature of less than 0.degree. C. and preferably less than -20.degree. C., the concentration of the segments of B being between 0.05 and 10 mole % preferably 0.1 to 5 mole % of the block copolyester, and an ionizable metal salt of an organic compound having at least one acidic proton using a concentration of ionizable metal salt which will convert at least 4% of the end groups of the polyester into carboxylate end groups but is insufficient to result in the melt degradation performance of the composition being substantially inferior to that of the polyester in the absence of the salt.