摘要:
The present invention relates to a process for reducing water carry-over during the production of polyolefin films or polyolefin tapes which are passed through a waterbath, where the polyolefin formulation comprises polyolefin waxes. The results are that less water is carried over and that the products have higher quality and better processing properties.
摘要:
Aromatic copolyamides are described, which are soluble in organic amide solvents. The polymers are composed to at least 95 mol % of repeat structural unitsA: --OC--AR--CO--B: --HN--Ar'--NH--C: --HN--Ar"--NH-- ##STR1## in the combinations A+B+C+D, or A+C+D+E and up to 5 mol % of m-bond-containing structural units F and/or G derived from aromatic dicarboxylic acids (F') and/or from aromatic diamines (G'), the sum total of the mole fractions of structural units A+F and the sum total of the mole fractions of the structural units of B+C+D+E+G being essentially the same, --Ar-- and --Ar'-- are divalent aromatic radicals whose C--N valence bonds are in a para-position or in a similar coaxial or parallel position and which may be substituted by one or two inert radicals, such as lower alkykl or halogen, ##STR2## is a trivalent aromatic radical which after removal of the --SO.sub.2 R group has the same meaning as --Ar-- or --Ar'-- or else is the structural unit ##STR3## wehre X is --O--, --NHCO--, --SO.sub.2 -- or --CO--, --R is lower alkyl and--R' is lower alkyl or alkoxy,and the proportions of the diamine components B, C, D and E are within the following limits:B: 25-47.5 mol %C: 7.5-30 molD: 45-67.5 mol andE: 20-40 mol.
摘要翻译:描述了芳族共聚酰胺,其可溶于有机酰胺溶剂。 聚合物由至少95摩尔%的重复结构单元A组成:-OC-AR-CO-B:-HN-Ar'-NH-C:-HN-Ar“-NH- 组合A + B + C + D或A + C + D + E和高达5摩尔%的由芳族二羧酸(F')衍生的含有M键的结构单元F和/或G的组合 和/或来自芳族二胺(G'),结构单元A + F的摩尔分数和B + C + D + E + G的结构单元的摩尔分数之和的总和基本相同 ,Ar-和-Ar'-是其CN价键处于对位或相似同轴或平行位置并且可被一个或两个惰性基团如低级烷基或卤素取代的二价芳族基团, 是一种三价芳族基团,除去-SO 2 R基后,与-Ar-或-Ar'具有相同的含义,或者是结构单元,其中X是-O-,-NHCO-, - SO 2 - 或-CO-,-R是低级烷基,-R'是低级烷基或烷氧基, 二胺成分B,C,D和E在以下限度内:B:25-47.5摩尔%C:7.5-30摩尔D:45-67.5摩尔,E:20-40摩尔。
摘要:
The present invention relates to a process for reducing water carry-over during the production of polyolefin films or polyolefin tapes which are passed through a waterbath, where the polyolefin formulation comprises polyolefin waxes. The results are that less water is carried over and that the products have higher quality and better processing properties.
摘要:
In a sealing element for a movable roof section of a vehicle which seal element includes a pocket delimited by a sealing wall of the sealing element and is open toward one side for receiving cables, a cable guide channel is formed on the inside of the sealing wall so as to be accessible by way of the open side of the pocket and a sealing lip extends over the open side of the pocket and forms, between the outside of the sealing wall and the sealing lip, a seal channel for receiving a part of the movable roof section when the movable roof section is closed.
摘要:
A process for the preparation of a polyolefin wax by polymerization or copolymerization of olefins or diolefins in suspension and in the presence of a catalyst. The process utilizes a metallocene and a cocatalyst, wherein the metallocene is a compound of the formula I ##STR1## in which M.sup.1 is a metal of group IVb, Vb or VIb of the Periodic Table of Elements, R.sup.1 and R.sup.2 are identical or different and are a hydrogen atom, a C.sub.1 -C.sub.10 -alkyl group, a C.sub.1 -C.sub.10 -alkoxy group, a C.sub.6 -C.sub.10 -aryl group, a C.sub.6 -C.sub.10 -aryloxy group, a C.sub.2 -C.sub.10 -alkenyl group, a C.sub.7 -C.sub.40 -arylalkyl group, a C.sub.7 -C.sub.40 -alkylaryl group, a C.sub.8 -C.sub.40 -arylalkenyl group or a halogen atom and R.sup.3 and R.sup.4 are identical or different and are a mononuclear or polynuclear hydrocarbon radical which may form a sandwich structure with the central atom M.sup.1, low-boiling hydrocarbons having 3 or 4 carbon atoms or low-boiling halogenated hydrocarbons are used as suspending agents and the heat of reaction is removed by evaporative cooling.
摘要:
The structure of the aromatic copolyether amide which can be processed as a thermoplastic comprises recurring units of the formulae --CO--Ar.sup.1 --CO-- (A), --NH--Ar.sup.1 --O--Ar.sup.1 --X--Ar.sup.1 --O--Ar.sup.1 --NH (B) and --NH--Ar.sup.2 --NH-- (C) in which Ar.sup.1 denotes a divalent, unsubstituted or substituted aromatic radical having 6 carbon atoms which is linked in the p-position, X represents a 2,2-propylidene link and Ar.sup.2 is identical with Ar.sup.1 or is Ar.sup.1 which is linked in the m-position, or is the --Ar.sup.1 --Z--Ar.sup.1 -- group in which Z is a direct bond or is a radical --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --SO.sub.2 --, --CO--, --O--, --CH.dbd.CH--, --CO--NH-- or --O--Ar.sup.1 --O-- or the radical ##STR1## in which R represents hydrogen or a branched or unbranched alkyl radical having 1-4 carbon atoms. The proportion of units (A) and of the sum of units (B) and (C) is each 100 mol-%, the proportion of units (C) being up to 50 mol-% and, if Z represents --SO.sub.2 --, up to 75 mol-%. The Staudinger index [.eta.] of the copolyether amide is in the range from 50 to 1000 cm.sup.3 /g, and the value of the glass transition temperature is above 200.degree. C. The copolyether amide is prepared by a low-temperature solution, solid, interface or melt condensation process. The moldings produced therefrom in the form of filaments, wires, films and other moldings are obtained by processing the pulverulent copolyether amides or their solutions.
摘要:
The invention relates to a hydraulic drive system used for the covers of vehicle openings, in particular for vehicle roofs with a construction that can be opened. In said system, the actuator that is designed to displace the cover is supplied with a bulk current, whose target value is determined in accordance with the control path of the actuator, which is in correlation with the controlled displacement of the cover and whose actual value is detected when supplied to the actuator by means of a bulk current sensor. The bulk current is adjusted to compensate for differences between the actual and target values.
摘要:
The invention relates to a hydraulic drive system used for the covers of vehicle openings, in particular for vehicle roofs with a construction that can be opened. In said system, the actuator that is designed to displace the cover is supplied with a bulk current, whose target value is determined in accordance with the control path of the actuator, which is in correlation with the controlled displacement of the cover and whose actual value is detected when supplied to the actuator by means of a bulk current sensor. The bulk current is adjusted to compensate for differences between the actual and target values.
摘要:
The invention is directed to a polymer and pigment composition utilizing a polyolefin wax produced by metallocene catalysis as a pigment dispersing auxiliary.
摘要:
In a vehicle roof support and operating arrangement by which a vehicle roof top can be moved between closed and open positions while supported on a component carrier which also supports a roof top operating mechanism and which is connected to the vehicle body, the component carrier includes a front transverse frame member, a rear transverse frame member and two side frame members extending between, and interconnecting, the front and rear transverse frame members so as to form a closed rigid support frame reinforcing the vehicle body.