Bayer Aktiengesellschaft

Plumley and Tyner

Eduard Radlmann

Gunther Nischk

Gunter Lorenz

Heinz Schaffner

Ulrich Reinehr

Jurgen Schramm

Claus-Rudiger Bernert

Dieter Arlt

Ludwig Bruns

Geert Christoph

Hans-Georg Gelhaar

Peter Hoffmann

Gunther Schnuchel

Klaus-Rudiger Bernert

Gunter Nischk

The invention relates to a process for the production of filaments and fibres having a moisture absorption of at least 7% and a water retention capacity of at least 25% by dry-spinning an acrylonitrile copolymer, containing more than 50 mval of carboxyl groups from a solvent, which contains 5 to 50% by weight of a compound with properties defined herein, washing the compound added to the solvent out of the freshly spun filaments and fibres and partly or completely converting the carboxyl groups into the salt form. The invention further relates to dry-spun filaments and fibres having a core and sheath structure, comprising a fibre-forming acrylonitrile copolymer having more than 50 mval of carboxyl and carboxylate groups and having a moisture absorption capacity of at least 7% and a water retention capacity of at least 25%.

Synthetic filaments and fibres with high moisture absorption and water

The invention relates to a process for the production of crosslinked fibres or filaments by spinning an acrylonitrile copolymer containing at least 20 mVal of carboxyl groups per kg of polymer together with a polyoxazoline in a polar organic solvent and thereafter crosslinking at temperatures of from 120 to 190.degree. C. The invention also relates to crosslinked acrylonitrile fibres and filaments obtainable by this process.

Crosslinked acrylonitrile copolymers

The invention is related to novel polycaprolactam filaments and fibres capable of being deeply dyed with acid dyes to give dye finishes with extreme fastness to light, characterized by the fact that they consist of physical mixtures of unmodified polycaprolactam and a basic polycaprolactam containing structural units corresponding to the formula: ##STR1## in which R represents an alkylene radical with 4 to 12 carbon atoms and x is an integer from 1 to 5, have relative solution viscosities of from 2.9 to 3.5 (as measured on solutions of 1 g of non-extracted polyamide in 100 ml of cresol at 25.degree. C) and contain free amino groups in a concentration range from 60 to 180 millivals per kg of polymer mixture.

Deep-dyeing polycaprolactam fibres and filaments

High molecular weight polyesters from terephthalic acid and 1,4 cyclohexane dimethanol, containing in polycondensed form a polytetrahydrofurane diol Fibers and filaments produced from these polyesters can be dyed carrier-free.

Terephthalic acid copolyesters which can be dyed in the absence of

The invention relates to a process for the production of solutions of substantially water-insoluble complex antimony compounds in polar organic solvents by esterifying an .alpha.-hydroxy polycarboxylic acid with a polyol, reacting an excess of the esterification product with an antimony oxide in a polar organic solvent and reacting the free carboxylic groups with a monoisocyanate.

Solutions of new antimony complexes

The invention relates to solutions of complex antimony compounds substantially insoluble in water which are produced by reacting antimony oxides with .alpha.-hydroxy carboxylic acids and further reaction with monoisocyanates as well as a process for the production of these solutions. The solutions according to the invention may be added to solutions of acrylonitrile polymers and copolymers and they improve the non-inflammability of shaped articles produced thereof.

Solutions of new complex antimony compounds

The invention relates to polyamide compositions of high-molecular weight, linear aliphatic polyamides with reduced surface resistance which are produced by solvent-free condensation of salts of aliphatic diamines and aliphatic dicarboxylic acids and/or of lactams and in which polyester amides which have been obtained by condensation of dicarboxylic acids or their derivatives, diols and primary-secondary aliphatic diamines are homogeneously distributed.

Antistatic polyamide compositions

The invention relates to flame-proof copolymers of acrylonitrile and vinyl or vinylidene halide which contain from 0.1 to 5 % by weight of antimony in form of a water-insoluble amide-group containing antimony complex compound.

Substantially non-inflammable acrylonitrile polymers containing antimony

The invention relates to a composition of matter which comprises A) from 95 to 99.9 % by weight of a copolymer of acrylonitrile, a vinyl and/or vinylidene halide and, optionally, at least one other copolymerisable compound; and B) from 0.1 to 5 % by weight of a substantially water-insoluble complex antimony compound containing amide groups, the complex antimony compound being obtainable by esterifying an .alpha.-hydroxy polycarboxylic acid with a polyol, reacting the esterification product with an antimony oxide in a polar organic solvent adding a monoisocyanate to the resulting solution in such a quantity that the free carboxyl groups are converted into the corresponding amide groups, and a process for the production of these compositions of matter.

Substantially non-inflammable acrylonitrile copolymers containing

The invention relates to novel permanently antistatic polyamide compositions comprising an aliphatic polyamide and from 0.5 to 40 % by weight, based on the polyamide composition, of a polyalkylene oxide obtained by the copolymerisation of mono-epoxides with di- or tri-epoxides.

Permanently antistatic polyamide compositions

This invention relates to antistatic compositions of high molecular weight linear aliphatic polyamides which are stabilized against yellowing due to the action of heat. These polyamides which may be formed into films or fibers, are prepared by the solvent-free condensation of salts of aliphatic diamines with aliphatic dicarboxylic acids and/or lactams and contain homogeneously distributed therein a composition of one or more polyoxyalkylene compounds and tertiary amides or diamides, having at least one tertiary amide group.

Antistatic polyamide compositions which are stabilized against yellowing

The invention relates to high molecular weight polycaprolactams containing monomeric units of the general formulae (I) and (II): ##EQU1## in which: M is an alkali metal; and

Polyamide concentrates containing sulphonate groups

This invention relates to a process for the preparation of a polycaprolactam which can be dyed with basic dyes and worked up from the melt to form products such as fibers or foils. The polycaprolactams contain structural elements of the formulae ##SPC1## Wherein

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Dormagen, Germany

Eduard Radlmann