Abstract: A disulphimide group-containing acrylonitrile copolymer semi-permeable membrane which comprises:(A) from 99 to 50% by weight of acrylonitrile units;(B) from 1 to 50% by weight of units of an acrylonitrile-copolymerizable ethylenically unsaturated monomer containing one or two disulphimide groups; and(C) from 0 to 30% by weight of units of one or more other acrylonitrile-copolymerizable olefinically unsaturated monomer, the sum of the percentages amounts to 100.The semi-permeable membranes may be used in reverse osmosis and ultrafiltration.

Abstract: This invention relates to urethanes which contain at least one sulphonic acid group and at least two free OH-groups and to a process for the preparation thereof.

Abstract: The invention relates to semipermeable membranes with a water absorption capacity of from 4.5 to 11% by weight, preferably from 4.5 to 8% by weight, as measured on approximately 40.mu. thick symmetrical films at room temperature and at 65% relative air humidity, a throughflow of 130 to 200 l/m.sup.2 d for a desalination level of 94.6 to 99.5% and consisting of an aromatic heterocycle-containing copolyamide with a relative viscosity of .gtoreq.1.4, as measured on a 0.5% N-methyl pyrrolidone solution at a temperature of 20.degree. C.

Abstract: The invention relates to semipermeable membranes with a water absorption capacity of from 4.5 to 10% by weight preferably from 4.5 to 8% by weight as measured on approximately 40.mu. thick symmetrical films at room temperature and 65% relative air humidity, with a throughflow of at least 80 1/m.sup.2 d for a desalination level of at least 85% and consisting of a fully aromatic copolyamide with a relative viscosity of .gtoreq.1,4, as measured on a 0.5% N-methyl pyrrolidone solution at a temperature of 20.degree. C.

Abstract: The instant invention relates to dihydroxy carbamates containing sulphonic acid groups, and to a process for their production. They are obtained by the addition of bisulphites to unsaturated carbamates.

Abstract: The invention relates to antistatic polyamide compositions comprising a polyamide and as an antistatic agent from 0.1 to 20%, preferably from 1.5 to 15%, by weight based on the total weight of the composition of urethanes with ether groups. The urethanes with ether groups are stable in melts of aliphatic polyamides for prolonged periods at temperatures of up to about 300.degree. C. and filaments and fibers of such polyamides or woven fabrics, knitted fabrics, non-woven or pile fabrics produced from these filaments or fibers show outstanding antistatic properties.

Abstract: The invention relates to a process for the production of a stabilized crosslinkable copolymer of acrylonitrile which comprises copolymerizing at least 65% by weight of acrylonitrile with from 0.1 to 3% by weight of an N-methylol acyl ester of an ethylenically unsaturated carboxylic acid amide, optionally from 0.5 to 5% by weight of an N-methylol alkyl ether of an ethylenically unsaturated carboxylic acid amide and, optionally, at least one other copolymerizable comonomer in an aqueous medium in the presence of a redox catalyst and in the presence of at least one water-soluble compound containing a carboxylic acid amide group.

Abstract: The present invention relates to new polyether urethanes corresponding to the general formula ##STR1## and to a process for their production. The polyether urethanes are stable for prolonged periods at temperatures of up to approximately 300.degree. C in aliphatic polyamide melts, and polyamides containing urethanes of this kind, more especially filaments and fibers of such polyamides or woven fabrics, knitted fabrics, nonwovens or pile fabrics produced from these filaments or fibers, show excellent antistatic properties.

Abstract: The invention relates to a process for the production of dyed filaments from aromatic polyamides which are not modified with acid or basic groups.

Abstract: The invention relates to a process for the production of dyed filaments from aromatic polyamides which are modified with acid groups.

Abstract: The invention relates to a process for the production of stabilized, crosslinkable copolymers of acrylonitrile with N-methylol alkyl ethers of unsaturated carboxylic acid amides and optionally other comonomers by polymerizing in the presence of a stabilizer compound containing a carboxylic acid amide group such as amide, urea or lactam.

Abstract: The invention relates to a process for the production of dyed filaments of aromatic polyamides which have not been modified with acid or basic group.

Abstract: The invention relates to a process for the production of dyed filaments from aromatic polyamides which contain acid groups.

Abstract: The invention relates to a process for the production of crosslinkable polymers of acrylonitrile by polymerising acrylonitrile with a crosslinking component and optionally other comonomers in strongly polar organic solvents and in the presence of a peroxodisulphate and a 1,3-diketone as initiator system.

Abstract: The instant invention relates to dihydroxy sulphonates containing ether groups, and to a process for their production. They are obtained by the addition of bisulphites to (poly)alkoxylated dihydroxy alkenes.

Abstract: This invention relates to the production of spinnable solutions of acrylonitrile homopolymers or acrylonitrile copolymers in which the polymerization is conducted in an organic solvent containing a catalyst system comprising an acid, e.g., sulfuric acid, a peroxodisulfate, e.g., ammonium peroxodisulfate, and a 1,3-diketone, e.g., acetyl acetone. Polymers having a good natural color and high K-values are obtained in good yields.

Abstract: The instant invention relates to sulphonates containing ether groups and derived from dihydroxy alkane sulphonic acids, and to a process for their production. They are obtained by the addition of bisulphites to (poly)alkoxylated dihydroxy alkenes.

Abstract: High molecular weight aromatic copolyamides which contain a small proportion of structural units having 2,3-(1H,3H)-quinazoline dione rings are disclosed. The presence of quinazolinedione ring units in the copolyamide results in an increased moisture absorption capacity. By using small amounts of quinazoline dione units, the good physical properties of the corresponding quinazoline dione-free polyamide are substantially retained while the moisture absorption is significantly increased. Larger amounts of quinazoline dione units than contemplated (15 mol percent and more) do not improve the moisture absorption further and adversely affect the physical properties. The copolyamides are useful in textile applications in which the improved moisture absorption serves to make clothing prepared from such textiles more comfortable.

Abstract: The invention relates to shaped articles of acrylonitrile polymers which comprise as an antistatically active additive from 0.

Abstract: 2-METHYLENE PROPANE PHOSPHONIC ACID ESTERS AND THEIR COPOLYMERS WITH ACRYLONITRILE ARE THE OBJECTS OF THE INVENTION. The fibers produced from the copolymers are flame-resistant and show increased thermal stability, improved affinity for dyes and fastness to light. The copolymers of acrylonitrile and 2-methylene propane phosphonic acid esters - in addition to other comonomers - are produced by polymerizing the monomers in solution or - preferably - in an aqueous suspension or emulsion. Formed articles, such as fibres from said copolymers can be prepared by spinning a solution of the copolymer in an organic solvent p.i. in dimethyl formamide.