摘要:
The invention relates to an initiator composition and method for anionic polymerisation, comprising at least one alkali metal hydride, selected from LiH, NaH and KH and at least one organoaluminium compound. The invention further relates to a method for anionic polymerisation of styrol or dienyl monomers using said initiator composition.
摘要:
A method for the production of impact-resistant moulding materials by anionic polymerization of vinyl aromatic monomers in the presence of rubber in a continuously through-flown reactor cascade consisting of at least two reactors. The vinyl aromatic monomers are fed to the reactors of the reactor cascade in partial flows and an anionic initiator and rubber are fed to at least the first reactor. The reactor cascade consists of backmixed reactors.
摘要:
Disclosed is a continuous method for producing polyamides, the oligomers or mixtures thereof, optionally with other reaction products, by reacting aminonitriles or dinitriles and diamines or mixtures thereof, optionally along with additional polyamide-forming monomers and/or oligomers, with an aqueous medium comprising aqueous monomer extracts or oligomer extracts which are obtained when extracting the polymer with water during the production of polyamides. Said reaction is carried out in a reactor which has a vertical longitudinal axis and is penetrated essentially in the longitudinal direction. According to the inventive method, water and/or the aqueous medium is/are introduced into the reactor at least at two different points located along the vertical longitudinal axis thereof, the aqueous medium being introduced at least at one point.
摘要:
The invention relates to a polyamide, the main chain thereof containing a chemically bonded amine selected from the group consisting of 2-methyl-1,5-diaminopentane and 1-amino-2-R-cyclopent-1-ene, wherein R represents a functional group that can react with an amino group to form an amide group. The invention also relates to a method for producing one such polyamide, and to fibres, films and moulded bodies containing the same.
摘要:
The invention relates to a polyamide comprising a compound having at least one hydroxyl group, chemically bonded to the end of the polymer chain by means of an amide group, a method for production of such a polyamide, and fibres, films and moulded bodies comprising at least one such polyamide.
摘要:
The invention relates to a polyamide, the main chain thereof containing a chemically bonded N-alkyl lactam. The invention also relates to a method for producing one such polyamide, and to fibres, films and moulded bodies containing the same.
摘要:
The invention relates to a polyamide comprising a compound having at least one hydroxyl group, chemically bonded to the end of the polymer chain by means of an amide group, a method for production of such a polyamide, and fibres, films and moulded bodies comprising at least one such polyamide.
摘要:
The invention relates to a method for the distillative separation of ammonia and water from mixtures arising during the production of polyamides, said mixture containing a lactam and/or diamines and, optionally, an aminonitrile and/or dinitrile in addition to cyclopentanones as foreign substances. Said method consists of two steps: 1) the mixture is distilled at 11 - 35 bars, resulting in the production of water, ammonia and cyclopentanone as overhead products (K1), and water, lactam and/or diamines and, optionally, aminonitrile and/or dinitrile, as base products (S1), and 2) K1 is distilled at 11 - 35 bars, resulting in the production of ammonia and cyclopentanone as an overhead product, and water as a base product (S2).
摘要:
The invention relates to a method for producing polyamides, their oligomers or mixtures thereof, optionally containing other reaction products, by reacting aminonitriles or dinitriles and diamines or a mixture containing aminonitrile, dinitrile and diamine and optionally additional polyamide-forming monomers and/or oligomers with water in a reactor (1) with a vertical longitudinal axis. According to said method, the reaction product is exfiltrated from the sump in the reactor (1) and accumulated ammonia and optionally other accumulated low-molecular compounds and water are drawn off via the head (2). The invention is characterised in that the reactor (1) comprises at least two chambers (4) arranged in a longitudinal direction one above the other, that the chambers (4) are separated from one another by liquid-tight floors (5), that each chamber (4) is connected to the one (4) immediately below by a respective liquid overflow (6) and a liquid product stream is drawn off via the liquid overflow (6) of the lowest chamber (4), that the gas chamber (7) above the liquid level in each chamber (4) is connected to the respective chamber (4) lying immediately above it via one or several conduits (8), which open respectively into a gas diffuser (9) comprising orifices (11) for the discharge of gas below the liquid level. The reactor also comprises at least one respective deflector plate (12) positioned vertically around each gas diffuser (9), the upper end of said plate terminating below the liquid level and the lower end terminating above the liquid-tight floor (5) of the chamber (4), thus sub-dividing each chamber (4) into one or more compartments supplied with gas (13) and one or more compartments without gas (14).
摘要:
The invention relates to a method for producing polyamides, their oligomers or mixtures thereof, optionally containing other reaction products, by reacting aminonitriles or dinitriles and diamines or a mixture containing aminonitrile, dinitrile and diamine and optionally additional polyamide-forming monomers and/or oligomers with water in a reactor (1) with a vertical longitudinal axis. According to said method, the reaction product is exfiltrated from the sump in the reactor (1) and accumulated ammonia and optionally other accumulated low-molecular compounds and water are drawn off via the head (2). The invention is characterised in that the reactor (1) comprises at least two chambers (4) arranged in a longitudinal direction one above the other, that the chambers (4) are separated from one another by liquid-tight floors (5), that each chamber (4) is connected to the one (4) immediately below by a respective liquid overflow (6) and a liquid product stream is drawn off via the liquid overflow (6) of the lowest chamber (4), that the gas chamber (7) above the liquid level in each chamber (4) is connected to the respective chamber (4) lying immediately above it via one or several conduits (8), which open respectively into a gas diffuser (9) comprising orifices (11) for the discharge of gas below the liquid level. The reactor also comprises at least one respective deflector plate (12) positioned vertically around each gas diffuser (9), the upper end of said plate terminating below the liquid level and the lower end terminating above the liquid-tight floor (5) of the chamber (4), thus sub-dividing each chamber (4) into one or more compartments supplied with gas (13) and one or more compartments without gas (14).