Abstract:
The invention relates to a device for producing moulded bodies from thermoplastic polymers, starting from monomers that form polymers of this type, in a discontinuous method. Said device comprises a) at least one reactor that is suitable for producing a thermoplastic polymer melt in a discontinuous process starting from monomers that form a polymer of this type, b) a network of pipes that is suitable for circulating the thermoplastic polymer melt and c) at least one device that is suitable for producing moulded bodies from a thermoplastic polymer melt. According to the invention, the reactor or reactors according to a) is/are connected to the network of pipes according to b) and the device or devices according to c) is/are connected to the network of pipes according to b). The invention also relates to a method for producing moulded bodies from thermoplastic polymers in a device of this type.
Abstract:
Polymeric material (I) comprising a) a polymer (II) having amide groups recurring in the polymer main chain and b) from 0.01 to 5% by weight, based on this polymer, of a titanium dioxide (III) having a median particle size d50 of up to 150 nm, and fibers, sheet materials and moldings comprising such a polymeric material.
Abstract:
An apparatus suitable for producing shaped bodies comprising thermoplastic polymers from monomers which form such polymers in a batch process comprises a) at least one reactor suitable for the batchwise preparation of a melt of a thermoplastic polymer from monomers which form such a polymer, b) a piping system suitable as circulation line for the melt of the thermoplastic polymer and c) at least one apparatus suitable for the production of shaped bodies from the melt of a thermoplastic polymer, wherein the reactor or reactors a) is/are connected to the piping system b) and the apparatus or apparatuses c) is/are connected to the piping system b), and an apparatus for producing shaped bodies comprising thermoplastic polymers in such an apparatus.
Abstract:
Polymeric material (I) comprising a) a polymer (II) having amide groups recurring in the polymer main chain and b) from 0.01 to 5% by weight, based on this polymer, of a titanium dioxide (III) having a median particle size d50 of up to 150 nm, and fibers, sheet materials and moldings comprising such a polymeric material.
Abstract:
The invention relates to a device for producing moulded bodies from thermoplastic polymers, starting from monomers that form polymers of this type, in a discontinuous method. Said device comprises a) at least one reactor that is suitable for producing a thermoplastic polymer melt in a discontinuous process starting from monomers that form a polymer of this type, b) a network of pipes that is suitable for circulating the thermoplastic polymer melt and c) at least one device that is suitable for producing moulded bodies from a thermoplastic polymer melt. According to the invention, the reactor or reactors according to a) is/are connected to the network of pipes according to b) and the device or devices according to c) is/are connected to the network of pipes according to b). The invention also relates to a method for producing moulded bodies from thermoplastic polymers in a device of this type.
Abstract:
1. A finely divided polymer dispersion which contains polymerized units of nitrogen-containing monomers, and is obtained by a two-stage polymerization reaction, wherein, in the first polymerization stage, a low molecular weight prepolymer, which has a viscosity of from 1.06 to 1.40 (measured in an Ubbelohde viscometer) in a 1% strength solution of a mixture of 99 parts by weight of dimethyl formamide and 1 part by weight of glacial acetic acid at 20 degrees C, is prepared in a water-miscible solvent, which may contain up to 15% by weight of water, in the manner of a solution copolymerization from a monomer mixture which contains (a) per mole of a nitrogen-containing monomer of the formula see diagramm : EP0051144,P13,F1 or see diagramm : EP0051144,P13,F3 where A is O or NH, B is Cn H2n , n being from 1 to 8, R**1 and R**2 are each Cm H2m+1 , m being from 1 to 4, R**3 is H or CH3 , X4 **- is OH**- , Cl**- , Br**- or CH3 -OSO3 H**- , and R**4 is Cm H2m+1 , m being from 1 to 4, (b) 2.5 to 10 moles of at least one nonionic, hydrophobic, ethylenically unsaturated monomer which, if it is polymerized on its own, forms a hydrophobic polymer, (c) 0.5 to 1.5 moles of an ethylenically unsaturated carboxylic acid or maleic anhydride, and (d) 0 to 7 moles of a nonionic, hydrophilic, ethylenically unsaturated monomer, the solution of the prepolymer is diluted with water in a weight ratio of from 1:3 to 1:50 and, in the second polymerization stage, 1 to 32 parts by weight of at least one nonionic, hydrophobic, ethylenically unsaturated monomer, which is the same as monomer (b) of the prepolymer, are polymerized per part by weight of the solution polymer in this polymer solution in the manner of an emulsion polymerization in the presence of a usual amount of a water-soluble polymerization initiator.
Abstract:
Polymeric material (I) comprising a) a polymer (II) having amide groups recurring in the polymer main chain and b) from 0.01 to 5% by weight, based on this polymer, of a titanium dioxide (III) having a median particle size d50 of up to 150 nm, and fibers, sheet materials and moldings comprising such a polymeric material.