MANUFACTURE OF BRANCHED POLYAMIDES
    92.
    发明公开
    MANUFACTURE OF BRANCHED POLYAMIDES 有权
    用于生产支化聚酰胺

    公开(公告)号:EP1015510A1

    公开(公告)日:2000-07-05

    申请号:EP98941202.8

    申请日:1998-09-03

    发明人: NG, Howard

    IPC分类号: C08G69/04 C08G69/28

    摘要: A multi-stage process for the manufacture of branched aliphatic polyamides is provided. The process comprises the steps, in sequence, of feeding to a reactor a slurry of at least one aliphatic dinitrile, and at least one aliphatic diamine, at least one of which is branched, in the presence of 0.05 to 2 % by weight of a phosphorous-containing compound, with the incremental addition of water, heating the slurry to a temperature of at least 270 °C while maintaining a pressure of at least 1.2 Mpa, venting water, ammonia and other volatile matter from the reactor while maintaining the temperature and pressure, maintaining the temperature for a further period of time while reducing the pressure to at least atmospheric pressure and then discharging the polyamide so formed. Polyamides made by this process are substantially the same as corresponding polyamides made by the conventional salt-strike process, and can be used in molding, coating and film applications. Examples of polyamides that can be made using this process include those formed from an admixture of adiponitrile and 2-methyl pentamethylene diamine, and from an admixture of 2-methyl glutaronitrile and hexamethylene diamine.

    PROCEDE D'EXTRACTION DE COMPOSES AMINES D'UN MILIEU LIQUIDE
    94.
    发明公开
    PROCEDE D'EXTRACTION DE COMPOSES AMINES D'UN MILIEU LIQUIDE 失效
    提取方法阿明化合物从液体介质

    公开(公告)号:EP0938366A1

    公开(公告)日:1999-09-01

    申请号:EP97943941.0

    申请日:1997-10-03

    摘要: The invention concerns a method for extracting by electrodialysis a compound comprising at least amine functions capable of protonation from a liquid medium. More particularly it concerns a method for extracting, and separating at least the monomers comprising amine functions capable of protonation from a liquid medium derived from the hydrolysis of polyamides. The method of extraction from a liquid medium consists in subjecting to protonation the amine function(s) of the compounds to be extracted by adjusting the pH of the medium and in separating the compounds by passing them through a cationic membrane under the effect of an electric current. The invention is particularly applicable in processes for the chemical stabilisation of polyamides such as the PA 66, PA 6.

    APPARATUS FOR PROCESSING MATERIALS
    96.
    发明授权
    APPARATUS FOR PROCESSING MATERIALS 失效
    设备材料加工

    公开(公告)号:EP0706420B1

    公开(公告)日:1998-08-19

    申请号:EP94920708.8

    申请日:1994-06-15

    IPC分类号: B01F7/24

    摘要: The present invention relates to an apparatus for processing materials, a process for mixing, finishing and de-volatizing polyamide to make 66 nylon and the 66 nylon made by this process. The apparatus comprises an agitator section (12) having an outlet (14) adjacent the bottom thereof; a transfer screw (20) disposed adjacent the outlet of the agitator section; a spiral ribbon (24) extending upwardly from the transfer screw; a ring (26) disposed vertically above the spiral ribbon, at least one baffle (32a, 32b) disposed vertically above the spiral ribbon and connected to the ring and a wall-wiping spur connected to the ring. Preferably, the apparatus has two baffles - an upper one (32a) for pumping the material downwardly and a lower one (32b) for pumping the material upwardly. The diameter of each baffle is preferably about 80 % of the diameter of the agitator section.

    Witterungsstabile Polyamide und Verfahren zu deren Herstellung
    98.
    发明公开
    Witterungsstabile Polyamide und Verfahren zu deren Herstellung 失效
    Witterungsstabile聚酰胺和Verfahren zu deren Herstellung

    公开(公告)号:EP0818491A2

    公开(公告)日:1998-01-14

    申请号:EP97111677.7

    申请日:1997-07-09

    申请人: EMS-INVENTA AG

    摘要: Die Erfindung betrifft witterungsstabile Polyamide und Verfahren zu deren Herstellung, wobei die Polymerisation bzw. Polykondensation der polyamidbildenden Komponenten (I) in Gegenwart von 0,02-0,7 Gew.-% 4-Amino-2,2,6,6-tetraalkylpiperidin (II), 0-0,5 Gew.-% eines aliphatischen oder cycloaliphatischen Diamins (III), welches eine primäre und eine tertiäre Aminogruppe trägt, und 0,02-0,7 Gew.-% eines in 4-Stellung zur OH-Gruppe funktionalisierten 2,6-Dialkyl-phenols (IV) der Formel
    worin R 1 und R 2 gleiche oder verschiedene Alkylreste mit 1 bis 6 C-Atomen sind, R 3 entweder ein Wasserstoffatom oder eine Methylgruppe ist, die funktionelle Gruppe A entweder eine freie Carboxylgruppe oder eine mit C 1 -C 4 -Alkoholen veresterte Carboxylgruppe oder eine primäre Aminogruppe darstellt, für x und y im Fall der Aminogruppe die Wertekombinationen (x = 2 / y = 1); (x = 2 / y = 0);
    (x = 1 / y = 0) und (x = 0 / y = 1) möglich sind und im Fall der freien oder veresterten Carboxylgruppe x und y zusätzlich jeweils 0 sein können,
    durchgeführt wird, und wobei sich die Mengen der Komponenten I bis IV zu 100 Gew.-% ergänzen, die Summe der Komponenten II, III und IV 0,05-1,3 Gew.-% beträgt und die Komponenten II, III und IV über Amidbindungen an die Polymerketten gebunden sind.
    Die Erfindung betrifft weiterhin witterungsstabile aus Lactamen, ω-Aminocarbonsäuren zugängliche Polyamide aus den vorgenannten Komponenten I, II, III, gegebenenfalls IV und 0,1 bis 1,2 Gew.-% einer Tri-, Tetra- oder Polycarbonsäure V sowie ein Verfahren zu deren Herstellung, wobei sich die Mengen der Komponenten I bis V zu 100 Gew.-% ergänzen, die Summe der Komponenten II, III, IV und V 0,2 bis 2,5 Gew.-% beträgt und die Komponenten II, III, IV und V über Amidbindungen an die Polymerketten gebunden sind.

    摘要翻译: 由内酰胺,ω-氨基羧酸,二羧酸和二胺或二酸/二胺盐生产耐候性,脂族和部分结晶或无定形部分芳族聚酰胺(PA),包括单体(I)在存在下的聚合或缩聚 (a)0.02-0.7重量%的4-氨基-2,2,6,6-四烷基哌啶(II),(b)0-0.5重量%(环)脂族二胺(III)。 和一个叔。 氨基,和(c)0.02-0.7重量%的式(IV)的4-官能化2,6-二烷基苯酚,其中R 1,R 2 = 1-6C烷基; R 3 = H或CH 3; A = COOH,COO(1-4C烷基)或基团。 氨基; 如果A =氨基,则x = 2和y = 1,或x = 2和y = 0,或x = 1和y = 0,或x = 0和y = 1; 如果A = COOH或酯化的COOH,x和y的相同组合是可能的,或x = y = 0。组分(I-IV)的总量= 100重量%,(II),(III )和(IV)= 0.05-1.3重量%,并且组分(II),(III)和(IV)通过酰胺键连接到聚合物链上。 还要求保护的是来自内酰胺或ω-氨基酸的类似的制备方法,其在上述(II),(III)和(IV)的存在下与(d)0.1-1.2重量%三 - ,四羧酸或多元羧酸(V),其中(II-V)的总量= 0.2-2.5重量%,并且这些组分通过酰胺键连接。 还要求的是通过这些方法获得的耐候性聚酰胺(PA)。

    VERFAHREN ZUM NACHKONDENSIEREN VON POLYKONDENSATEN, INSBESONDERE VON POLYAMID 6.6
    99.
    发明公开
    VERFAHREN ZUM NACHKONDENSIEREN VON POLYKONDENSATEN, INSBESONDERE VON POLYAMID 6.6 失效
    方法缩聚物的aftercondensing,特别是聚酰胺6.6

    公开(公告)号:EP0812338A1

    公开(公告)日:1997-12-17

    申请号:EP95940934.0

    申请日:1995-12-27

    IPC分类号: C08G69 C08G85 C08J3 C08J5

    摘要: The invention relates to a process for one-stage subsequent condensation of polycondensates, in particular of polyamide 6.6 granules in a fluidised bed reactor (1). During said process, a partial stream of a carrier gas, where nitrogen (N2) is used as the carrier gas, is removed at a temperature of 20-230 °C from the main stream and is conveyed in such a manner through a gas washing column (15) charged with water that the partial stream of conditioned carrier gas is returned with a point of condensation of 10-80 °C (100 % of relative humidity) into the main stream of the carrier gas. During the cooling phase of the granules, return of the partial stream of carrier gas is stopped. After cooling, the granules are removed and used directly in other applications. Said process achieves the designated viscosity and also a precisely defined level of humidity in the polymer, which level is important for further processing.