The invention is directed to a polypropylene composition, to a three-dimensional article comprising said polypropylene composition, and to the use of said composition for automotive articles. The polypropylene composition of the invention comprises: 40-90% by total weight of the composition of a polymer blend comprising polypropylene having a melt flow index as measured according to ISO 1133 at 230° C. and 2.16 kg of 2.0-100 g/10 min; 5-25% by total weight of the composition of one or more plastomers; 0.5-25% by total weight of the composition of mineral filler selected from the group consisting of phyllosilicates, mica or wollastonite; and 0.2-4% by total weight of the composition of glass fibres having an average fibre diameter in the range of 5-30 μm.

A two-component coating composition contains (1) a paint base component comprising (A) at least one polycarbonate diol, (B) at least one hydroxyl-containing acrylate resin, polyester resin and/or polyester acrylate resin having a hydroxyl number of 75 to 500 mg KOH/g, and (C) at least one filler modified with at least one organosilane, and (2) a hardener component comprising (D) at least one organic polyisocyanate, where the coating composition has a viscosity of 50 to 2000 mPa.Math.s at a shear stress of 1000 l/s and a temperature of 23° C. and a proportion of organic solvents of 100 to 350 g/L.

A two-component coating composition contains (1) a paint base component comprising (A) at least one polycarbonate diol, (B) at least one hydroxyl-containing acrylate resin, polyester resin and/or polyester acrylate resin having a hydroxyl number of 75 to 500 mg KOH/g, and (C) at least one filler modified with at least one organosilane, and (2) a hardener component comprising (D) at least one organic polyisocyanate, where the coating composition has a viscosity of 50 to 2000 mPa.Math.s at a shear stress of 1000 l/s and a temperature of 23° C. and a proportion of organic solvents of 100 to 350 g/L.

A silica sol dispersed in a nitrogen-containing solvent and a silica-containing resin composition containing a nitrogen atom-containing polymer. A silica sol including silica particles containing aluminum atoms and having an average primary particle diameter of 5 to 100 nm, the silica particles being dispersed in a nitrogen-containing solvent, wherein the aluminum atoms are bonded to the surfaces of the silica particles in an amount in terms of Al.sub.2O.sub.3 of 800 to 10,000 ppm/SiO.sub.2. The silica particles are bonded to a silane compound or a hydrolysate of the silane compound. The nitrogen-containing solvent is an amide solvent. The nitrogen-containing solvent is dimethylacetamide, dimethylformamide, N-methylpyrrolidone, or N-ethylpyrrolidone. The insulating resin composition includes the silica sol and a nitrogen-containing polymer. The nitrogen-containing polymer is polyimide, polyamide, polyamic acid, polyamideimide, polyetherimide, or polyesterimide. An insulation-coated conductor wire produced by insulation coating of a conductor wire with the insulating resin composition.

This disclosure describes polymerization processes and processes for quenching polymerization reactions using reactive particulates, such as amorphous silica, as quenching agents, typically in solution or bulk polymerization processes.

This disclosure describes polymerization processes and processes for quenching polymerization reactions using reactive particulates, such as amorphous silica, as quenching agents, typically in solution or bulk polymerization processes.

Provided is a method for preparing a modified filler. The method includes in sequence providing an acidified aqueous slurry of an untreated inorganic filler which has not been previously dried; an emulsifier material; and a hydrophobating agent having the following structural formula (I):
R.sub.a.sup.−M-X.sub.(4−a)  (I)
wherein: R is C.sub.6 to C.sub.22 alkyl, M is silicon, titanium or zirconium, X is OR′ or halogen, R′ is C.sub.1 to C.sub.4 alkyl, and a is 1;
washing and/or filtering the acidified aqueous slurry to obtain a modified filler; and, optionally, drying the modified filler. Polymeric compositions and articles also are provided.

Provided is a method for preparing a modified filler. The method includes in sequence providing an acidified aqueous slurry of an untreated inorganic filler which has not been previously dried; an emulsifier material; and a hydrophobating agent having the following structural formula (I):
R.sub.a.sup.−M-X.sub.(4−a)  (I)
wherein: R is C.sub.6 to C.sub.22 alkyl, M is silicon, titanium or zirconium, X is OR′ or halogen, R′ is C.sub.1 to C.sub.4 alkyl, and a is 1;
washing and/or filtering the acidified aqueous slurry to obtain a modified filler; and, optionally, drying the modified filler. Polymeric compositions and articles also are provided.

A functionalized graphene oxide nitrile rubber and A tooth-scar-free tooth block is provided. The functionalized graphene oxide nitrile rubber comprises the following components in parts by weight: 100-140 parts of nitrile rubber, 30-90 parts of a functionalized graphene oxide nitrile rubber masterbatch, 1.8-2.52 parts of a vulcanizing agent, 1.2-1.68 parts of a vulcanization accelerator, 5-7 parts of a vulcanization activator, 17-23.8 parts of a plasticizer, 2-2.8 parts of antioxidant, 59-86.6 parts of a filler, 0.1-0.14 parts of a curing agent, and 2-2.8 parts of dichlorophenol. The functionalized graphene oxide nitrile rubber above has excellent mechanical properties, a wide applicable temperature range and strong stability in use, and can be prepared into a tooth-scar-free tooth block.

A functionalized graphene oxide nitrile rubber and A tooth-scar-free tooth block is provided. The functionalized graphene oxide nitrile rubber comprises the following components in parts by weight: 100-140 parts of nitrile rubber, 30-90 parts of a functionalized graphene oxide nitrile rubber masterbatch, 1.8-2.52 parts of a vulcanizing agent, 1.2-1.68 parts of a vulcanization accelerator, 5-7 parts of a vulcanization activator, 17-23.8 parts of a plasticizer, 2-2.8 parts of antioxidant, 59-86.6 parts of a filler, 0.1-0.14 parts of a curing agent, and 2-2.8 parts of dichlorophenol. The functionalized graphene oxide nitrile rubber above has excellent mechanical properties, a wide applicable temperature range and strong stability in use, and can be prepared into a tooth-scar-free tooth block.