Abstract: A polycarbonate composition having present therein particles of rubber grafted with an ethylenically unsaturated aromatic monomer and either acrylonitrile or methacrylonitrile, characterized in that the particles have an average size of from 20 to 300 nm before being blended with the polycarbonate and agglomerate during blending to form aggregates of average size 500 to 10,000 nm, and in that the composition can be injection moulded to produce a moulding wherein the aggregates substantially retain their identity and the moulding has a surface of matt appearance.

Abstract: The invention relates to a polyblend comprising from 20 to 80% of a polymer A and from 80 to 20% of a polymer B, based on the total weight of polymers A and B in the polyblend, and wherein:Polymer A is a copolymer of 35 to 65% of methyl methacrylate and 35 to 65% of styrene grafted on butadienestyrene rubber, methyl methacrylate being partially replaceable by an acrylic ester, and either methyl methacrylate or grafting styrene being partially replaceable by acrylonitrile; andPolymer B is a copolymer of from 20 to 60% of a vinylaromatic hydrocarbon monomer, from 20 to 60% of a C.sub.1 -C.sub.4 -alkyl acrylate or a C.sub.1 -C.sub.4 -alkyl methacrylate ester, and from 12 to 30% of maleic anhydride or maleimide or a N-substituted maleimide or a mixture of such maleic acid derivatives.The polyblends have heat resistance, transparency and impact strength.

Abstract: Molding compositions are prepared from blends of (A) a thermoplastic copolyetherester elastomer; and (B) an ABS or MBS polymer. Such blends have improved ductility and chemical resistance.

Abstract: Molding compositions are prepared from blends of (A) a thermoplastic copolyetherester elastomer; (B) a styrene maleic anhydride polymer; and (C) an ABS or MBS polymer. Component B, the styrene maleic anhydride polymer may optionally contain a termonomer such as methylmethacrylate or acrylonitrile and a rubber component.

Abstract: Molding compositions are prepared from blends of (A) a thermoplastic copolyetherester elastomer; (B) a styrene maleic anhydride polymer; (C) an ABS or MBS polymer; and (D) a nitrile rubber. Component B, the styrene maleic anhydride polymer may optionally contain a termonomer such as methyl-methacrylate or acrylonitrile and a rubber component.

Abstract: The tendency to crosslink of polymer compositions comprising polymer units derived from acrylonitrile and maleic anhydride is controlled by the use of boron compounds selected from boron oxide, boron acids and esters of boron acids.

Abstract: The tendency to crosslink of polymer compositions comprising polymer units derived from acrylonitrile and maleic anhydride is controlled by the use of an acid ester of a phosphorus acid.

Abstract: Styrene/maleic anhydride copolymers and their polyblends can be plasticized using an ester of an aromatic carboxylic acid, which may be halogenated, and a C.sub.10 to C.sub.24 alkyl alcohol having a melting point of at least 50.degree. C.

Abstract: Styrene/maleic anhydride polymers can be made more resistant to combustion by incorporation therein of minor amounts of polyvinyl chloride. The compositions can also comprise MBS, ABS and other flame retardant additives.

Abstract: Rubber modified copolymers of styrene and maleic anhydride can be blended with polyvinyl chloride and optional impact modifiers to produce compositions with advantageous properties.

Abstract: A tetrapolymer of .alpha.-methylstyrene, styrene, maleic anhydride and acrylonitrile is prepared by mass/suspension batch process without the need for staged late addition of monomers. The tetrapolymer is useful as a replacement for SAN as diluent in the preparation of ABS-type polymers.