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 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 a polyamide by converting a mixture containing a monomer that comprises a nitrile group and at least one additional functional group that is capable of forming a carboxamide group, in addition to water in the presence of titanium dioxide, which acts as the catalyst. Said method is characterised in that the titanium dioxide has a BET surface area ranging between 5 and 35 m2/g, determined by means of a volumetric process according to a multipoint method, as per the German standard DIN 66 131.
摘要:
The invention relates to a method of producing polyamides in an aqueous reaction mixture that contains a nitrile, selected from 6-aminocapronitrile and adipodinitrile. The inventive method is characterized by using a nitrile through which, in its liquid state, a gas that is inert with respect to the nitrile, was led.
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:
Disclosed is a method for producing polyamides and the oligomers or mixtures thereof, optionally with additional reaction products, by reacting a reaction mixture containing monomers that comprise CN groups or -CONH2 groups, other optional polyamide-forming monomers and/or oligomers, and water in a device. Said method is characterized in that the surfaces of the device, which enter in contact with the reaction mixture, are entirely or partly made of a material that is selected among a group comprising: a) an austenitic steel containing 15 to 25 percent by weight of chromium, 3 to 35 percent by weight of nickel, 0 to 10 percent by weight of molybdenum, and other optional alloy components, the balance being made up of iron and the percentages by weight being in relation to a); b) a duplex steel containing 20 to 30 percent by weight of chromium, 3 to 10 percent by weight of nickel, 0 to 5 percent by weight of molybdenum, and other optional alloy components, the balance being made up of iron and the percentages by weight being in relation to b); and c) a basic nickel alloy containing 12 to 25 percent by weight of chromium, 12 to 20 percent by weight of molybdenum, and other optional alloy components, the balance being made up of nickel and the percentages being in relation to c). Also disclosed are devices that are used in or intended for such a method.
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 method for the production of polyamides from amino nitriles and water, (1) by reacting aminonitriles with water at a temperature of 180 - 350 DEG C and a pressure of 30 - 120 bar adjusted in such a way that in addition to a liquid phase, a gaseous phase is also present in the first reaction step; (2) relaxation of the reaction mixture obtained in the first reaction step via an evaporator zone or adiabatically with removal of water and ammonia in a second reaction step and (3) post-condensation in the second reaction step at a pressure 0.1 mbar to 5 bar at a temperature of 230 - 320 DEG C.
摘要:
The invention relates to a continuous method for producing a polyamide by reacting at least one aminonitrile with water. Said method comprises the following steps: (1) at least one aminonitrile is reacted with water in the presence of an organic liquid diluting agent at a temperature of 90 to 400 °C and a pressure of 0.1 to 35 x 106 Pa in a stream tube containing a Brönsted acid catalyst selected from a beta-zeolite, phyllosilicate, or titanium dioxide catalyst consisting of 70 to 100 wt. % of anatase and 0 to 30 wt. % of rutile, in which up to 40 wt. % of the titanium dioxide can be replaced by tungsten oxide, in order to obtain a reaction mixture, (2) the reaction mixture is further reacted at a temperature of 150 to 400 °C and a pressure which is lower than the pressure in step 1, in the presence of a Brönsted acid catalyst selected from a beta-zeolite, phyllosilicate, or titanium dioxide catalyst consisting of 70 to 100 wt. % anatase and 0 to 30 wt. % rutile, in which up to 40 wt. % of the titanium dioxide can be replaced by tungsten oxide, the temperature and the pressure being chosen in such a way that a first gas phase and a first liquid phase or a first solid phase or a mixture of a first solid phase and a first liquid phase is obtained, the first gas phase being separated from the first liquid phase or first solid phase or the mixture of the first liquid phase and first solid phase, and (3) the first liquid phase or the first solid phase or the mixture of the first liquid phase and first solid phase is mixed with a gaseous phase or a liquid phase containing water, at a temperature of 150 to 370 °C and a pressure of 0.1 to 30 x 106 Pa, in order to obtain a product mixture.
摘要:
The invention relates to a method for producing a polymer. Said method is characterized as follows: a) a mixture (I) containing 6-aminocapronitrile and water is converted into a mixture (II) containing caprolactam, ammonia, water, high boilers and low boilers in the presence of a catalyst; then b) the ammonia is removed from mixture (II) to obtain a mixture (III) containing caprolactam, water, high boilers and low boilers; subsequently c) the water is completely or partially eliminated from mixture (III) to obtain a mixture (IV) containing caprolactam, high boilers and low boilers; and finally d) mixture (IV) is subjected to a polymerization reaction. The invention also relates to a polymer obtained according to said method, to its use in the production of fibres, flat material and moulded bodies that are obtained using a polymer of this type.